1. The utility model provides an automatic change device of confirming soil body fracture toughness which characterized in that: the compact tensile test structure comprises a fracture toughness testing structure (1), a formed soil body (2) and a compact tensile test sample compacting and manufacturing structure (3), wherein the compacting and manufacturing structure (3) of the compact tensile test sample fixedly connected to one side of the fracture toughness testing structure (1) is formed, and the formed soil body (2) is fixedly connected to the inner sides of the two ends of the fracture toughness testing structure (1).

2. The apparatus of claim 1, wherein the apparatus is configured to automatically determine fracture toughness of a soil body: the fracture toughness test structure (1) comprises a matching support frame (4), a positioning weight carrying plate (5), a control panel (6), a positioning anti-falling locking column (7), a first test locking structure (8), a test end carrying plate (9), a movable guide detection structure (10) and a second test locking structure (11), wherein the positioning weight carrying plate (5) is welded at the top end of one end of the matching support frame (4), the control panel (6) is fixedly connected to one side of the positioning weight carrying plate (5), the positioning anti-falling locking column (7) is welded at the inner side of the positioning weight carrying plate (5), the first test locking structure (8) is clamped at the outer side of the positioning anti-falling locking column (7), one end of the first test locking structure (8) is connected with one end of a formed soil body (2) in a clamping manner, and the test end carrying plate (9) is welded at the top end of the other end of the matching support frame (4), the inboard of test end loading board (9) is rotated and is connected with and moves and lead detection structure (10), the one end joint that moves and lead detection structure (10) has second test locking structure (11), the one end of second test locking structure (11) is connected with the other end joint of shaping soil body (2).

3. The apparatus of claim 2, wherein the apparatus is configured to automatically determine fracture toughness of the earth mass, and further comprising: the structure of first test locking structure (8) and the structure of second test locking structure (11) are the same completely, first test locking structure (8) and second test locking structure (11) are all including adorning locking ring (12), location carry on piece (13), extend bracing piece (14), locking claw locating piece (15), built-in locating piece (16) and power take off block (17), the one end welding of adorning locking ring (12) has location carry on piece (13), the one end welding of location carry on piece (13) has extension bracing piece (14), the one end welding of extension bracing piece (14) has locking claw locating piece (15), the week side of locking claw locating piece (15) is fixed with three built-in locating piece (16).

4. The apparatus of claim 3, wherein the apparatus is further configured to determine the fracture toughness of the earth mass by: first test locking structure (8) and second test locking structure (11) still include power take off piece (17), first motor (18), toggle gear axle (19), linkage rack (20) and press from both sides tight locking lever (21), the one end welding of built-in locating piece (16) has power take off piece (17), screw fixedly connected with first motor (18) are passed through to one side of power take off piece (17), the output fixedly connected with toggle gear axle (19) of first motor (18), the one end meshing of toggle gear axle (19) is connected with linkage rack (20), linkage rack (20) and the inboard sliding connection of built-in locating piece (16), the top welding of linkage rack (20) has tight locking lever (21).

5. The apparatus of claim 4, wherein the apparatus is further configured to determine the fracture toughness of the earth mass by: the movable guide detection structure (10) comprises a wire passing wheel (22), a first torque supporting rod (23), a linkage ring (24), a reinforced pulling wire (25), a linkage carrying block (26), a direction dividing guide wire (27), a placing plate (28), a counterweight guiding column (29) and a balancing weight (30), wherein the first torque supporting rod (23) is welded at two ends of the wire passing wheel (22), the first torque supporting rod (23) is rotatably connected with the test end carrying plate (9), the reinforced pulling wire (25) is wound on the outer side of the wire passing wheel (22), the linkage ring (24) is fixedly connected with one end of the reinforced pulling wire (25), the linkage ring (24) is fixedly connected with a locking ring (12) at the position of the second test locking structure (11), the linkage carrying block (26) is fixedly connected with the bottom end of the other end of the reinforced pulling wire (25), and the placing plate (28) is connected with the bottom end of the linkage carrying block (26) through the direction dividing guide wire (27), balance weight guide columns (29) are welded on two sides of the upper surface of the placing plate (28), and a plurality of balance weight blocks (30) are connected to the outer sides of the balance weight guide columns (29) in a sliding mode.

6. The apparatus of claim 1, wherein the apparatus is configured to automatically determine fracture toughness of a soil body: compact tensile sample hit real structure (3) including making interior tubulation (31), automatic upset shaping ejection of compact structure (32) and reciprocal automation and hit real structure (33), a preparation through-hole has been seted up to the inboard of making interior tubulation (31), the automatic upset shaping ejection of compact structure (32) of bottom fixedly connected with of making interior tubulation (31), the reciprocal automation of the top fixedly connected with of making interior tubulation (31) hits real structure (33).

7. The apparatus of claim 6, wherein the apparatus is further configured to determine the fracture toughness of the earth mass by: the automatic overturning forming discharging structure (32) comprises an built-in limiting block (34), an extending carrying plate (35), a second motor (36), a second torque supporting rod (37), an L-shaped driving block (38) and a sealing bottom plate (39), wherein the built-in limiting block (34) is welded at one end of a manufactured built-in pipe (31), the extending carrying plate (35) is welded at one side of the built-in limiting block (34), the second motor (36) is fixedly connected at one side of the extending carrying plate (35), the second torque supporting rod (37) is fixedly connected at the output end of the second motor (36), the second torque supporting rod (37) is rotatably connected with the built-in limiting block (34), the L-shaped driving block (38) is fixedly connected at the outer side of the second torque supporting rod (37), and the sealing bottom plate (39) is fixed at one end of the L-shaped driving block (38), the sealing bottom plate (39) is positioned at the bottom end of the manufactured inner installation pipe (31).

8. The apparatus of claim 7, wherein the apparatus is configured to automatically determine fracture toughness of the earth mass: reciprocal automatic compaction structure (33) are including adorning fixed dress bracing piece (40), hydraulic piston cylinder (41), supplementary year piece (42), third motor (43), eccentric stirring board (44), cooperation push guide block (45) and compaction push pedal (46), the both sides fixedly connected with on built-in pipe (31) top of making adorns bracing piece (40), fix dress bracing piece (40) are close to the bottom of making built-in pipe (31) one side and pass through screw fixedly connected with hydraulic piston cylinder (41), the supplementary year piece (42) of output fixedly connected with of hydraulic pressure (41), one side wherein supplementary year piece (42) are kept away from one side of making built-in pipe (31) and are passed through screw fixedly connected with third motor (43), the eccentric stirring board (44) of output fixedly connected with of third motor (43), the opposite side supplementary year piece (42) are close to one side of making built-in pipe (31) and are rotated with another eccentric stirring board (44) And the bottom ends of the two eccentric shifting plates (44) are rotatably connected with a matching pushing and guiding block (45), the bottom end of the matching pushing and guiding block (45) is fixedly connected with a compaction push plate (46), and the compaction push plate (46) is in clearance fit with the preparation through hole.

9. Use of an apparatus for automated determination of fracture toughness in earth masses, as claimed in any one of the preceding claims, characterized by the following steps:

the first step is as follows: placing the detected clay inside a preparation through hole of a preparation inner tube (31);

secondly, the following steps: starting a reciprocating automatic compaction structure (33) to automatically and efficiently perform reciprocating pressurization on the clay in the preparation through hole, so that the detected clay is extruded and pressed into a formed soil body (2);

the third step: the bottom end of the manufactured inner loading pipe (31) is opened by starting the automatic overturning forming discharging structure (32), and the formed soil body (2) is led out;

the fourth step: clamping one end of the formed soil body (2) with a first test locking structure (8), clamping the other end of the formed soil body (2) with a second test locking structure (11), and forming a reserved groove at the top end of the formed soil body (2) so as to obtain a reserved length a of fracture toughness;

and a sixth step: at the moment, a plurality of balancing weights (30) are sequentially slid and pressed upwards at the position of a balancing weight guide column (29) to form pulling on the formed soil body (2) until the formed soil body (2) is fractured, so that the average stress sigma of the whole section of the fracture toughness is calculated;

the seventh step: measuring the fracture width of the formed soil body (2) after fracture, thereby calculating the W of fracture toughness;

eighth step: and calculating a specific numerical value of the fracture toughness of the formed soil body (2) by using a formula.

Background

Under the elastoplasticity condition, when the stress field intensity factor increases to a certain critical value, the crack is destabilized and expanded to cause the material fracture, the stress field intensity factor of this critical or destabilizing expansion is fracture toughness, and the corresponding detection device is needed for detecting the fracture toughness of the soil body conveniently, however, the existing device is inconvenient for automation in the using process to detect the fracture toughness of the soil body, and lacks the corresponding structural design made by standardized high-efficiency compaction of the detected soil body.

Disclosure of Invention

The invention aims to provide a device for automatically determining the fracture toughness of a soil body and a using method thereof, which aim to solve the existing problems: the existing device is inconvenient to automatically detect the fracture toughness of the soil body in the using process.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic change device of confirming soil body fracture toughness, includes fracture toughness test structure, shaping soil body and compact tensile sample's the compaction and make the structure, the compaction and make the structure of one side fixedly connected with compact tensile sample of fracture toughness test structure, the inboard fixedly connected with shaping soil body at fracture toughness test structure both ends.

Preferably, the fracture toughness testing structure comprises a matching support frame, a positioning weight support plate, a control panel, a positioning anti-falling locking column, a first testing locking structure, a testing end support plate, a movable guide detection structure and a second testing locking structure, wherein the top end of one end of the matching support frame is welded with the positioning weight support plate, one side of the positioning weight support plate is fixedly connected with the control panel, the inner side of the positioning weight support plate is welded with the positioning anti-falling locking column, the outer side of the positioning anti-falling locking column is clamped with the first testing locking structure, one end of the first testing locking structure is connected with one end of a formed soil body in a clamping manner, the top end of the other end of the matching support frame is welded with the testing end support plate, the inner side of the testing end support plate is rotatably connected with the movable guide detection structure, and one end of the movable guide detection structure is clamped with the second testing locking structure, and one end of the second test locking structure is connected with the other end of the formed soil body in a clamping manner.

Preferably, the structure of the first test locking structure is identical to that of the second test locking structure, the first test locking structure and the second test locking structure respectively comprise a mounting locking ring, a positioning carrying block, an extension supporting rod, a locking claw positioning block, an internally-mounted positioning block and a power output block, the positioning carrying block is welded at one end of the mounting locking ring, the extension supporting rod is welded at one end of the positioning carrying block, the locking claw positioning block is welded at one end of the extension supporting rod, and the three internally-mounted positioning blocks are fixed on the peripheral side face of the locking claw positioning block.

Preferably, first test locking structure and second test locking structure still include power take off piece, first motor, toggle gear axle, linkage rack and press from both sides tight locking lever, the one end welding of built-in locating piece has the power take off piece, the first motor of screw fixedly connected with is passed through to one side of power take off piece, the output fixedly connected with toggle gear axle of first motor, the one end meshing of toggle gear axle is connected with the linkage rack, the inboard sliding connection of linkage rack and built-in locating piece, the top welding of linkage rack has the tight locking lever of clamp.

Preferably, the movable guide detection structure comprises a wire passing wheel, a first torque supporting rod, a linkage ring, a reinforced pulling wire, a linkage carrying block, a branch guiding wire, a placing plate, a counterweight guiding column and a counterweight block, the two ends of the wire passing wheel are welded with first torque supporting rods which are rotationally connected with the test end lapping plate, a reinforced pulling wire is wound on the outer side of the wire passing wheel, one end of the reinforced pulling wire is fixedly connected with a linkage ring, the linkage ring is fixedly connected with a matching locking ring at the second test locking structure, the bottom end of the other end of the reinforced pull wire is fixedly connected with a linkage carrying block, the bottom end of the linkage carrying block is connected with a placing plate through a branch guide line, both sides of the upper surface of the placing plate are welded with counterweight guide posts, the outside sliding connection of counter weight guide post has a plurality of balancing weights, the weight of balancing weight is ten kilograms.

The two ends of the formed soil body are respectively connected with a first test locking structure and a second test locking structure, a first motor is controlled to start to rotate clockwise in the connection process to drive a toggle gear shaft to rotate, the linkage rack is driven to move under the toggle of the toggle gear shaft and under the guide of an internally-installed positioning block by utilizing the meshing of the toggle gear shaft and the linkage rack, so that the displacement towards the formed soil body is formed, the end part of the formed soil body is clamped, at the moment, the first test locking structure is fixedly connected with a positioning anti-dropping locking column to form a fixed limit for one end of the formed soil body, at the moment, the number of counter weights is sequentially increased at the top end of a placing plate to obtain the downward pressing stress, and the pull of one end of the formed soil body is formed by utilizing the matching of a diversion guide line, a linkage carrying block, a reinforced pull line and a linkage ring and the connection of the linkage ring and the second test locking structure, make the shaping soil body pull open certain reservation groove, stop increasing the quantity of balancing weight this moment, accomplish the measurement to the reservation groove height, follow-up quantity that continues to increase the balancing weight again forms bigger atress, until the shaping soil body is broken, utilizes the conversion formula of weight and stress, obtains full section average stress to accomplish the measurement to width behind the fracture of shaping soil body.

Preferably, compact tensile sample hit real structure of making including making interior tubulation, automatic upset shaping ejection of compact structure and reciprocal automatic hit real structure, the inboard of making interior tubulation is seted up one and is highly for forty centimeters, and the diameter is twenty centimeters's preparation through-hole, the automatic upset shaping ejection of compact structure of bottom fixedly connected with of making interior tubulation, the reciprocal automatic structure of hitting of top fixedly connected with of making interior tubulation.

Preferably, automatic change upset shaping ejection of compact structure includes built-in stopper, extends to take support plate, second motor, second torque bracing piece, L type area driving block and sealing bottom plate, the one end welding of making built-in pipe has built-in stopper, the welding of one side of built-in stopper has the extension to take support plate, the one side of extending to take support plate is through screw fixedly connected with second motor, the output end fixedly connected with second torque bracing piece of second motor, the second torque bracing piece rotates with built-in stopper to be connected, the outside fixedly connected with L type area driving block of second torque bracing piece, the one end of L type area driving block is fixed with sealing bottom plate, sealing bottom plate is located the bottom of making built-in pipe.

Preferably, the reciprocating automatic compaction structure comprises a fixed-loading supporting rod, a hydraulic piston cylinder, an auxiliary loading block, a third motor, an eccentric shifting plate, a matched pushing and guiding block and a compaction pushing plate, wherein the fixed-loading supporting rods are fixedly connected to two sides of the top end of the manufactured inner pipe, the bottom end, close to one side of the manufactured inner pipe, of each fixed-loading supporting rod is fixedly connected with the hydraulic piston cylinder through a screw, the output end of each hydraulic piston cylinder is fixedly connected with the auxiliary loading block, one side, far away from the side of the manufactured inner pipe, of each auxiliary loading block on one side is fixedly connected with the third motor through a screw, the output end of the third motor is fixedly connected with the eccentric shifting plate, one side, close to the manufactured inner pipe, of each auxiliary loading block on the other side is rotatably connected with the other eccentric shifting plate, the bottom ends of the two eccentric shifting plates are rotatably connected with the matched pushing and guiding block, and the bottom end of the matched pushing and guiding block is fixedly connected with the compaction pushing plate, the compaction push plate is in clearance fit with the preparation through hole.

The detected soil body is placed in a preparation through hole at the position of a prepared inner filling pipe, the sealing bottom plate completes the sealing of the interior of the preparation through hole, the hydraulic piston cylinder is controlled to drive the auxiliary carrying block to move downwards until the compaction push plate reaches the top end of the preparation through hole, the torque output driving of the eccentric shifting plate is completed by the third motor, the eccentric design of the eccentric shifting plate is utilized, the eccentric shifting plate has the highest point and the lowest point in the rotating process, the matched pushing and guiding block and the compaction push plate are driven to complete the reciprocating lifting and hammering, so that the soil body is extruded and compacted in the preparation through hole, under the condition of one end of compaction, the hydraulic piston cylinder is used to push the auxiliary carrying block to drive the compaction push plate to be far away from the interior of the preparation through hole, the vacant part in the preparation through hole is added into a certain soil body, and finally the torque output to the second torque supporting rod is completed by controlling the second motor after the size requirement of the formed soil body is met, the second torque support rod is connected with the L-shaped driving block, so that the L-shaped driving block is driven by the second torque support rod to rotate, the sealing bottom plate is driven to complete angle adjustment, the sealing bottom plate and the preparation through hole are blocked and cancelled, the third motor is controlled to stop torque output, and the compaction push plate is driven by the hydraulic piston cylinder to complete extrusion and derivation of a formed soil body formed inside the preparation through hole.

A use method of the environment monitoring data acquisition device is used for any one of the above steps, and comprises the following steps:

the first step is as follows: placing the detected clay inside a preparation through hole of the prepared inner filling pipe;

secondly, the following steps: starting a reciprocating automatic compaction structure to automatically and efficiently perform reciprocating pressurization on the clay in the preparation through hole, so that the detected clay is extruded and pressed into a formed soil body;

the third step: the bottom end of the manufactured inner filling pipe is opened by starting the automatic overturning molding discharging structure, and the molded soil body is led out;

the fourth step: clamping one end of the formed soil body with the first test locking structure, clamping the other end of the formed soil body with the second test locking structure, and forming a reserved groove at the top end of the formed soil body, so as to calculate the reserved length a of the fracture toughness;

and a sixth step: at the moment, a plurality of balancing weights are sequentially slid and pressed upwards at the balancing weight guide column to form pulling on the formed soil body until the formed soil body is broken, so that the average stress sigma of the whole section of the fracture toughness is calculated;

the seventh step: measuring the fracture width of the formed soil body after fracture, thereby calculating the W of the fracture toughness;

eighth step: and calculating a specific numerical value of the fracture toughness of the formed soil body by using a formula.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the device, through the design of the fracture toughness testing structure, the device is convenient for carrying out automatic detection clamping on the manufactured soil body, and the fracture toughness of the soil body to be detected is obtained through the design of the whole structure;

2. according to the invention, through the design of compacting and manufacturing the structure of the compact tensile sample, the device is convenient for compacting and manufacturing the standard detection soil body with high efficiency and automation of soil, so that the detection efficiency and the detection standard degree of fracture toughness are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a side view of the present invention in its entirety;

FIG. 3 is a schematic view of a partial structure of a fracture toughness test structure according to the present invention;

FIG. 4 is a schematic partial structural view of a first test lock structure and a second test lock structure of the present invention;

FIG. 5 is a schematic view of a partial structure of a motion-guided detection structure according to the present invention;

FIG. 6 is a schematic view of a portion of a compacted structure of a compact tensile specimen according to the present invention;

FIG. 7 is a schematic view of a partial structure of an automatic inverted forming discharging structure according to the present invention;

FIG. 8 is a schematic view of a part of the reciprocating automated compaction apparatus according to the present invention;

FIG. 9 is a schematic diagram of the detection principle of the present invention.

In the figure: 1. a fracture toughness test structure; 2. forming a soil body; 3. compacting the compact tensile sample to form a structure; 4. assembling a support frame; 5. positioning a weight carrying plate; 6. a control panel; 7. positioning the anti-drop locking column; 8. a first test locking structure; 9. a test end is provided with a loading plate; 10. a motion-guided detection structure; 11. a second test locking structure; 12. assembling a locking ring; 13. positioning the carrying block; 14. extending the support rod; 15. a locking claw positioning block; 16. a positioning block is arranged in the shell; 17. a power output block; 18. a first motor; 19. a gear shaft is shifted; 20. a linkage rack; 21. clamping the locking bar; 22. a wire passing wheel; 23. a first torque support rod; 24. a link ring; 25. reinforcing the pulling wire; 26. a linkage carrying block; 27. a direction-guiding line; 28. placing the plate; 29. a counterweight guide post; 30. a balancing weight; 31. manufacturing an internal pipe; 32. automatically turning, molding and discharging the material; 33. a reciprocating automatic compaction structure; 34. a limiting block is arranged in the shell; 35. extending the carrying plate; 36. a second motor; 37. a second torque support bar; 38. an L-shaped driving block; 39. sealing the bottom plate; 40. fixing a supporting rod; 41. a hydraulic piston cylinder; 42. an auxiliary mounting block; 43. a third motor; 44. an eccentric toggle plate; 45. a pushing guide block is matched; 46. and (5) compacting the push plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The first embodiment is as follows:

please refer to fig. 1-2:

the utility model provides an automatic change device of confirming soil body fracture toughness, includes fracture toughness test structure 1, the compaction of shaping soil body 2 and compact tensile sample and makes structure 3, and the compaction of one side fixedly connected with compact tensile sample of fracture toughness test structure 1 makes structure 3, and the inboard fixedly connected with shaping soil body 2 at fracture toughness test structure 1 both ends.

Please refer to fig. 3-5:

the fracture toughness test structure 1 comprises a matching support frame 4, a positioning weight loading plate 5, a control panel 6, a positioning anti-falling locking column 7, a first test locking structure 8, a test end loading plate 9, a movable guide detection structure 10 and a second test locking structure 11, wherein the top end of one end of the matching support frame 4 is welded with the positioning weight loading plate 5, one side of the positioning weight loading plate 5 is fixedly connected with the control panel 6, the inner side of the positioning weight loading plate 5 is welded with the positioning anti-falling locking column 7, the outer side of the positioning anti-falling locking column 7 is clamped with the first test locking structure 8, one end of the first test locking structure 8 is connected with one end of a formed soil body 2 in a clamping manner, the top end of the other end of the matching support frame 4 is welded with the test end loading plate 9, the inner side of the test end loading plate 9 is rotatably connected with the movable guide detection structure 10, one end of the movable, one end of the second test locking structure 11 is connected with the other end of the formed soil body 2 in a clamping manner;

the structure of the first test locking structure 8 is completely the same as that of the second test locking structure 11, the first test locking structure 8 and the second test locking structure 11 both comprise an assembly locking ring 12, a positioning carrying block 13, an extension supporting rod 14, a locking claw positioning block 15, an internally-installed positioning block 16 and a power output block 17, the positioning carrying block 13 is welded at one end of the assembly locking ring 12, the extension supporting rod 14 is welded at one end of the positioning carrying block 13, the locking claw positioning block 15 is welded at one end of the extension supporting rod 14, and the three internally-installed positioning blocks 16 are fixed on the peripheral side surface of the locking claw positioning block 15;

the first test locking structure 8 and the second test locking structure 11 further comprise a power output block 17, a first motor 18, a toggle gear shaft 19, a linkage rack 20 and a clamping lock rod 21, wherein the power output block 17 is welded at one end of the built-in positioning block 16, the first motor 18 is fixedly connected to one side of the power output block 17 through a screw, the toggle gear shaft 19 is fixedly connected to the output end of the first motor 18, one end of the toggle gear shaft 19 is connected with the linkage rack 20 in a meshed mode, the linkage rack 20 is connected with the inner side of the built-in positioning block 16 in a sliding mode, and the clamping lock rod 21 is welded at the top end of the linkage rack 20;

the movable guide detection structure 10 comprises a wire passing wheel 22, a first torque supporting rod 23, a linkage ring 24, a reinforced pulling wire 25, a linkage carrying block 26, a branch guiding wire 27, a placing plate 28, a counterweight guiding column 29 and a counterweight block 30, wherein the first torque supporting rod 23 is welded at two ends of the wire passing wheel 22, the first torque supporting rod 23 is rotatably connected with a test end carrying plate 9, the reinforced pulling wire 25 is wound at the outer side of the wire passing wheel 22, the linkage ring 24 is fixedly connected with one end of the reinforced pulling wire 25, the linkage ring 24 is fixedly connected with a mounting locking ring 12 at a second test locking structure 11, the linkage carrying block 26 is fixedly connected with the bottom end of the other end of the reinforced pulling wire 25, the placing plate 28 is connected with the bottom end of the linkage carrying block 26 through the branch guiding wire 27, the counterweight guiding columns 29 are welded at two sides of the upper surface of the placing plate 28, and a plurality of counterweight blocks 30 are slidably connected with the outer sides of the counterweight guiding columns 29, the weight of the counterweight 30 is ten kilograms;

the two ends of the formed soil body 2 are respectively connected with the first test locking structure 8 and the second test locking structure 11, the first motor 18 is controlled to start to rotate clockwise in the connection process, the toggle gear shaft 19 is driven to rotate, the linkage rack 20 is driven to move towards the formed soil body 2 under the toggle of the toggle gear shaft 19 and under the guide of the built-in positioning block 16 by utilizing the engagement of the toggle gear shaft 19 and the linkage rack 20, so that the end part of the formed soil body 2 is clamped, at the moment, the first test locking structure 8 is fixedly connected with the positioning anti-falling locking column 7 to form a fixed limit for one end of the formed soil body 2, at the moment, the quantity of the counter weights 30 is sequentially increased at the top end of the placing plate 28, so that the downward pressure stress is obtained, and the connection between the linkage ring 24 and the second test locking structure 11 is utilized by utilizing the matching of the direction dividing guide line 27, the linkage carrying block 26, the reinforced pulling line 25 and the linkage ring 24, thus, one end of the formed soil body 2 is pulled, so that the formed soil body 2 is pulled to a certain reserved groove, the increase of the number of the balancing weights 30 is stopped at the moment, the measurement of the height of the reserved groove is completed, the number of the balancing weights 30 is continuously increased subsequently, larger stress is formed until the formed soil body 2 is broken, the full-section average stress is obtained by using a conversion formula of weight and stress, and the measurement of the width of the formed soil body 2 after the formed soil body 2 is broken is completed;

please refer to fig. 6-8:

the compacting and manufacturing structure 3 for the compact tensile sample comprises a manufactured inner tubulation 31, an automatic overturning and forming discharging structure 32 and a reciprocating automatic compacting structure 33, wherein a preparation through hole with the height of forty centimeters and the diameter of twenty centimeters is formed in the inner side of the manufactured inner tubulation 31, the bottom end of the manufactured inner tubulation 31 is fixedly connected with the automatic overturning and forming discharging structure 32, and the top end of the manufactured inner tubulation 31 is fixedly connected with the reciprocating automatic compacting structure 33;

the automatic overturning molding discharging structure 32 comprises an internal limiting block 34, an extension loading plate 35, a second motor 36, a second torque supporting rod 37, an L-shaped driving block 38 and a sealing bottom plate 39, wherein the internal limiting block 34 is welded at one end of the manufactured internal pipe 31, the extension loading plate 35 is welded at one side of the internal limiting block 34, the second motor 36 is fixedly connected to one side of the extension loading plate 35 through a screw, the second torque supporting rod 37 is fixedly connected to the output end of the second motor 36, the second torque supporting rod 37 is rotatably connected with the internal limiting block 34, the L-shaped driving block 38 is fixedly connected to the outer side of the second torque supporting rod 37, the sealing bottom plate 39 is fixed to one end of the L-shaped driving block 38, and the sealing bottom plate 39 is positioned at the bottom end of the manufactured internal;

the reciprocating automatic compaction structure 33 comprises a fixed carrying support rod 40, a hydraulic piston cylinder 41, an auxiliary carrying block 42, a third motor 43, an eccentric shifting plate 44, a matched pushing guide block 45 and a compaction pushing plate 46, wherein the two sides of the top end of the manufactured inner pipe 31 are fixedly connected with the fixed carrying support rod 40, the bottom end of one side of the fixed carrying support rod 40, which is close to the manufactured inner pipe 31, is fixedly connected with the hydraulic piston cylinder 41 through a screw, the output end of the hydraulic piston cylinder 41 is fixedly connected with the auxiliary carrying block 42, one side of the auxiliary carrying block 42, which is far away from the manufactured inner pipe 31, is fixedly connected with the third motor 43 through a screw, the output end of the third motor 43 is fixedly connected with the eccentric shifting plate 44, one side of the other side of the auxiliary carrying block 42, which is close to the manufactured inner pipe 31, is rotatably connected with the other eccentric shifting plate 44, the bottom ends of the two eccentric shifting plates 44 are rotatably connected with, the compaction push plate 46 is in clearance fit with the prepared through hole.

The detected soil body is placed in the prepared through hole at the position of the prepared internally-installed pipe 31, the sealing bottom plate 39 finishes sealing the inside of the prepared through hole, the hydraulic piston cylinder 41 is controlled to drive the auxiliary carrying block 42 to move downwards until the compaction push plate 46 reaches the top end of the prepared through hole, the third motor 43 finishes torque output driving on the eccentric shifting plate 44, the eccentric design of the eccentric shifting plate 44 is utilized, the eccentric shifting plate 44 has the highest point and the lowest point in the rotating process, so that the matching derivation block 45 and the compaction push plate 46 are driven to finish reciprocating lifting hammer pressing, the soil body is extruded and compacted in the prepared through hole, under the condition of one end compaction, the hydraulic piston cylinder 41 is utilized to push the auxiliary carrying block 42 to drive the compaction push plate 46 to be far away from the inside of the prepared through hole, the vacant part in the prepared through hole is added into a certain soil body, and finally the size requirement of the formed soil body 2 is met, the torque output of the second torque supporting rod 37 is completed by controlling the second motor 36, the connection between the second torque supporting rod 37 and the L-shaped driving block 38 is utilized, the L-shaped driving block 38 is driven by the second torque supporting rod 37 to rotate, the sealing bottom plate 39 is driven to complete angle adjustment, the sealing bottom plate 39 and the preparation through hole are not blocked, the third motor 43 is controlled to stop torque output at the moment, and the compaction push plate 46 is driven by the hydraulic piston cylinder 41 to complete extrusion and derivation of the formed soil body 2 prepared inside the preparation through hole.

Example two:

the use method of the device for automatically determining the fracture toughness of the soil body is used for the above embodiment and comprises the following steps:

the first step is as follows: by placing the clay to be detected inside the preparation through-hole of the preparation inner tube 31;

secondly, the following steps: starting the reciprocating automatic compaction structure 33 to perform automatic efficient reciprocating pressurization on the clay in the preparation through hole, so that the detected clay is extruded into a formed soil body 2;

the third step: the bottom end of the manufactured inner filling pipe 31 is opened by starting the automatic overturning molding discharging structure 32, and the molded soil body 2 is led out;

the fourth step: clamping one end of the formed soil body 2 with the first test locking structure 8, clamping the other end of the formed soil body 2 with the second test locking structure 11, and forming a reserved groove at the top end of the formed soil body 2 so as to calculate the reserved length a of the fracture toughness;

and a sixth step: at the moment, a plurality of balancing weights 30 are sequentially slid and pressed upwards at the balancing weight guide column 29 to form pulling on the formed soil body 2 until the formed soil body 2 is fractured, so that the full-section average stress sigma of fracture toughness is obtained;

the seventh step: measuring the fracture width of the formed soil body 2 after fracture, thereby calculating the W of fracture toughness;

eighth step: according to the formulaAnd calibrating the shape parameter ya/w by adopting finite element numerical calculation, and then calculating the specific numerical value of the fracture toughness of the formed soil body 2 according to actual test data.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.