1. The utility model provides a be used for nodular underground continuous wall festival portion to extrude including the construction equipment who becomes the groove which characterized in that: including crowded frame (2), be used for with lift by crane equipment be connected and will crowded frame (2) of expanding send into jib (3) to the groove of working (1) and connect and expand between frame (2) and jib (3) and be used for ordering about crowded frame (2) of expanding around jib (3) axis pivoted rotation power supply (4), crowded frame (2) of expanding includes two crowded pole (5) that expand each other at intervals and connect in two crowded flexible power supply (6) of level between expanding pole (5), the shape cooperation underground continuous wall festival cell body of crowded pole (5) of expanding, the flexible power supply of level (6) can order to two crowded pole (5) of expanding and keep away from or be close to the removal in opposite directions.

2. The construction device for segmental extruding and grooving of the underground diaphragm wall as claimed in claim 1, wherein: the extruding and expanding rod (5) comprises an upper inclined rod (16), a middle vertical rod (17) and a lower inclined rod (18), one end of the upper inclined rod (16) departing from the extruding and expanding rod (5) is hinged to the rotary power source (4), the middle vertical rod (17) and the upper inclined rod (16) or the rotary axis of the lower inclined rod (18) are perpendicular to the axis of the hanging rod (3), the rotary axis of the middle vertical rod (17) and the upper inclined rod (16) is parallel to the rotary axis of the middle vertical rod (17) and the lower inclined rod (18), the end parts of the two lower inclined rods (18) departing from the middle vertical rod (17) are hinged to each other, and the rotary axes of the two lower inclined rods (18) are parallel to the rotary axis of the middle vertical rod (17) and the upper inclined rod (16); the lower inclined rod (18) is detachably connected with the middle vertical rod (17).

3. The construction device for segmental extruding and grooving of the underground diaphragm wall as claimed in claim 2, wherein: two be connected with between lower down the bracing (18) articulated position and the flexible power supply of level (6) and assist crowded elastic reset mechanism (22) that expands frame (2) and reset fast, elastic reset mechanism (22) can dismantle with the flexible power supply of level (6) and be connected.

4. The construction device for segmental extruding and grooving of the underground diaphragm wall as claimed in claim 1, wherein: the horizontal telescopic power source (6) comprises a first jack (20) and a second jack (21), and the first jack (20) and the second jack (21) are distributed at intervals along the axis of the middle vertical rod (17).

5. The construction device for segmental extrusion-drawing grooving of the segmental underground diaphragm wall as claimed in claim 4, wherein: the first jack (20) and the second jack (21) are both bidirectional hydraulic jacks.

6. The construction device for segmental extruding and grooving of the underground diaphragm wall as claimed in claim 1, wherein: the rotary power source (4) comprises a bearing plate (7) fixedly connected to the bottom end of the suspender (3), a driving motor (8) fixedly connected to the upper surface of the bearing plate (7), and a connecting column (9) penetrating through one side of the bearing plate (7) departing from the suspender (3); an output shaft of the driving motor (8) penetrates through the bearing plate (7) and is fixedly connected with a driving gear (11); the top of spliced pole (9) is rotated and is connected on accepting board (7), coaxial fixedly connected with driven gear (12) on spliced pole (9), driven gear (12) mesh with drive gear (11) mutually, the equal fixedly connected with hinge lug (13) of bottom lateral wall of spliced pole (9), hinge lug (13) are provided with two along spliced pole (9) symmetry, go up down tube (16) and hinge lug (13) one-to-one setting, wear to be equipped with hinge pin (15) on hinge lug (13), and the axis of hinge pin (15) is perpendicular, the axis of jib (3), hinge pin (15) pass hinge lug (13) and with wear to locate on down tube (16).

7. A method of constructing a segmental underground diaphragm wall according to any one of claims 2 to 6, wherein: the method comprises the following steps of S1, excavating a construction groove (1);

s2, reaming and grooving construction, S2-1, performing extrusion and expansion work on the bottom end of the construction groove (1), disassembling and separating the lower inclined rod (18) and the middle vertical rod (17), sequentially connecting the rotary power source (4) and the extrusion and expansion frame (2) to the suspender (3), sending the extrusion and expansion frame (2) to the bottom end of the construction groove (1) by hanging the suspender (3), starting the horizontal telescopic power source (6), enabling the two middle vertical rods (17) to be away from each other until the two middle vertical rods are abutted against the groove wall of the construction groove (1), and then starting the rotary power source (4);

s2-2, performing squeezing and expanding work on the middle part of the construction groove (1), starting a horizontal telescopic power source (6) to enable two middle vertical rods (17) to approach to each other until the distance between the two middle vertical rods (17) is smaller than the width of the construction groove (1); then lifting the suspender (3), taking the squeezing and expanding device out of the construction groove (1), installing a lower inclined rod (18) at the bottom end of a middle vertical rod (17), then hoisting the squeezing and expanding frame (2) into the middle part of the construction groove (1), starting a horizontal telescopic power source (6), and then starting a rotary power source (4);

s2-3, measuring the squeezed groove wall, and calibrating the measured section shape with a design drawing;

s2-4, repeating the steps S2-1, S2-2 and S2-3N times, wherein N is more than two and is an integer;

s3, pouring the reinforced concrete in the construction groove (1), putting down a reinforcement cage of the underground continuous wall, and then pouring the concrete.

8. The method for constructing a segmental underground diaphragm wall as claimed in claim 7, wherein: in the steps S2-1 and S2-2, the rotary power source (4) drives the expanding frame (2) to rotate back and forth around the axis of the suspender (3), and the angle of the back and forth rotation is larger than 180 degrees and smaller than 210 degrees.

Background

At present, the segmental underground diaphragm wall is gradually popularized to other anti-pulling and anti-floating engineering fields due to the excellent engineering characteristics of the segmental underground diaphragm wall.

Before the construction of the segmental underground diaphragm wall, a construction groove needs to be formed in a soil body zone on the ground, and then groove expanding construction is carried out on the corresponding segmental position of the construction groove. And finally, pouring reinforced concrete to form the segmental underground continuous wall.

The existing section grooving construction of the segmental underground diaphragm wall generally adopts a section excavating and cutting technology, the excavating and cutting technology can only be applied to soil bodies with better soil quality and stronger bearing capacity, and the soil bodies at the positions of the segments are easy to collapse by adopting the excavating and cutting technology aiming at the soil bodies in weak soil areas.

Therefore, the inventors consider that: the construction means of the sections of the existing segmental underground continuous wall is limited, and a simple and effective construction device and method for extruding and expanding the sections are needed to be provided.

Disclosure of Invention

In order to reduce the probability of collapse of the sections of the underground continuous wall, the application provides a construction method of the segmental underground continuous wall and a section extruding and expanding groove forming device thereof.

In a first aspect, the present application provides a construction apparatus for segmental extruding-scraping grooving of a segmental diaphragm wall.

The utility model provides a construction equipment that is used for crowded grooving of drawing together of nodular underground continuous wall festival portion, its include crowded expand the frame, be used for with lift by crane equipment and will crowd and expand the frame and send into the jib of construction inslot and connect and expand between frame and the jib and be used for ordering about crowded expansion frame around jib axis pivoted rotation power supply, crowded expansion frame includes two crowded expansion rod that separate each other and connects the flexible power supply of level between two crowded expansion rod, the shape cooperation underground continuous wall festival portion cell body of crowded expansion rod's shape, the flexible power supply of level can order about two crowded expansion rod and keep away from or be close to the removal in opposite directions.

Through the technical scheme, the extrusion and expansion frame extends into the construction groove through the hanging rod, the extrusion and expansion rod is abutted to the groove wall of the construction groove through the horizontal telescopic power source, then the rotary power source is started, the extrusion and expansion frame rotates, the extrusion and expansion rod extrudes the soil body of the construction groove wall while rotating, after extrusion and expansion for many times, the soil body of the groove wall corresponding to the construction groove becomes compact, the step of soil cutting is reduced, and the section of the segmental underground diaphragm wall is formed.

Preferably, the squeezing and expanding rod comprises an upper inclined rod, a middle vertical rod and a lower inclined rod, one end of the upper inclined rod, which is far away from the squeezing and expanding rod, is hinged with a rotary power source, the middle vertical rod and the upper inclined rod or the rotary axis of the middle vertical rod and the lower inclined rod are both perpendicular to the axis of the hanging rod, the rotary axes of the middle vertical rod and the upper inclined rod are parallel to the rotary axis of the middle vertical rod and the rotary axis of the lower inclined rod, the end parts, which are far away from the middle vertical rod, of the two lower inclined rods are hinged with each other, and the rotary axes of the two lower inclined rods are parallel to the rotary axes of the middle vertical rod and the upper inclined rod; the lower inclined rod is detachably connected with the middle vertical rod.

Through above-mentioned technical scheme, montant back of the body or in opposite directions removal in the flexible power supply drive of level, go up down the down tube and centering montant mutually takes place to rotate, then rotate under the power supply of rotating orders about, crowd the last down tube that draws together the pole, well montant and down the down tube when rotating, form and link two sections for the cylindrical cell body in the middle part of the round platform stake to can make the both ends of festival all be the face of slope. The lower oblique rods of the two squeezing rods are hinged with each other, and the two squeezing rods form a whole body, so that the probability that the bottom ends of the squeezing rods are suspended and deformed and inclined is reduced.

Preferably, an elastic reset mechanism for assisting the squeezing and expanding frame to reset quickly is connected between the hinged position of the lower inclined rod and the horizontal telescopic power source, and the elastic reset mechanism is detachably connected with the horizontal telescopic power source.

Through above-mentioned technical scheme, elasticity resets and can be extruded and produce the reaction when the flexible power supply of level orders about two montants and keeps away from in opposite directions. When the horizontal telescopic power source drives the two vertical rods to approach each other, the elastic reset piece stretches and assists the squeezing and expanding frame to reset and deform quickly.

Preferably, the horizontal telescopic power source comprises a first jack and a second jack, and the first jack and the second jack are distributed at intervals along the axis of the middle vertical rod.

Through the technical scheme, the first jack and the second jack can form the rectangular frame with the two middle vertical rods, so that the stability of the end parts of the two middle vertical rods is improved, and the stability of the expansion frame during rotation is improved.

Preferably, the first jack and the second jack are both bidirectional hydraulic jacks.

Through above-mentioned technical scheme, two-way hydraulic jack compares one-way hydraulic jack, and montant is in opposite directions or back of the body removal in the order that can be faster improves the efficiency of construction.

Preferably, the rotary power source comprises a bearing plate fixedly connected to the bottom end of the suspender, a driving motor fixedly connected to the upper surface of the bearing plate, and a connecting column penetrating through the bearing plate and deviating from one side of the suspender; an output shaft of the driving motor penetrates through the bearing plate and is fixedly connected with a driving gear; the top of spliced pole is rotated and is connected on accepting the board, coaxial fixedly connected with driven gear on the spliced pole, driven gear meshes with drive gear mutually, the equal fixedly connected with hinge lug of bottom lateral wall of spliced pole, hinge lug are provided with two along the spliced pole symmetry, go up down the down tube and set up with hinge lug one-to-one, wear to be equipped with articulated round pin on the hinge lug, and the axis of articulated round pin is perpendicular, the axis of jib, articulated round pin pass hinge lug and with wear to locate on the down tube.

In another aspect, the present application provides a method of constructing a segmental underground diaphragm wall.

A construction method of a segmental underground diaphragm wall comprises the following steps of S1, excavating a construction groove; s2, reaming to form a groove, S2-1, performing extrusion and expansion work at the bottom end of the construction groove, disassembling and separating the lower inclined rod and the middle vertical rod, sequentially connecting a rotary power source and an extrusion and expansion frame to the suspension rod, feeding the extrusion and expansion frame to the bottom end of the construction groove through the suspension rod, starting a horizontal telescopic power source, enabling the two middle vertical rods to be away from each other in a back-to-back mode until the two middle vertical rods abut against the groove wall of the construction groove, and then starting the rotary power source; s2-2, performing squeezing and expanding work on the middle part of the construction groove, starting a horizontal telescopic power source to enable two vertical rods to approach each other until the distance between the two vertical rods is smaller than the width of the construction groove; then lifting the hanging rod, taking the extruding and expanding device out of the construction groove, mounting a lower inclined rod at the bottom end of the middle vertical rod, then hanging the extruding and expanding frame into the middle of the construction groove, starting a horizontal telescopic power source, and then starting a rotary power source; s2-3, measuring the squeezed groove wall, and calibrating the measured section shape with a design drawing; s2-4, repeating the steps S2-1, S2-2 and S2-3N times, wherein N is more than two and is an integer; and S3, pouring the reinforced concrete in the construction groove, lowering a reinforcement cage of the underground continuous wall, and then pouring the concrete.

Through the technical scheme, the segmental underground continuous wall is formed by construction, the step of soil cutting construction is saved, and the segments of the segmental underground continuous wall can be conveniently, safely formed in the region with soft soil texture.

Preferably, in the steps S2-1 and S2-2, the rotary power source drives the companding frame to rotate back and forth around the axis of the hanging rod, and the angle of the back and forth rotation is larger than 180 degrees and smaller than 210 degrees.

Through above-mentioned technical scheme, reduced the flexible power source pipeline of level or the probability that the pipeline takes place to twine and damage.

In summary, the present application has at least one of the following effects:

1. the squeezing and expanding frame is driven to abut against the wall of the construction groove by a horizontal telescopic power source and rotates under the drive of a rotary power source, so that the corresponding wall of the construction groove is squeezed and expanded to form a section, the soil body of the section is more compact due to the squeezing action because the soil cutting step is reduced, and the soil body of the section has better stability and safety performance;

2. the construction forms the segmental underground continuous wall, saves the step of soil cutting construction, and ensures that the segment of the segmental underground continuous wall can be conveniently, safely formed in the region with soft soil quality.

3. The probability that the pipeline or the pipeline of the horizontal telescopic power source is wound and damaged is reduced.

Drawings

FIG. 1 shows a construction groove with a bottom section and a middle section.

FIG. 2 is a schematic view of the overall structure of the extruding-expanding slot forming device according to the embodiment of the present application.

Fig. 3 is an enlarged schematic structural view of a rotary power source according to an embodiment of the present application.

Fig. 4 is a schematic structural view of the hinged connection of the upper diagonal rod and the middle vertical rod of the embodiment of the application.

Fig. 5 is a schematic structural view of the hinged connection of two lower inclined rods according to the embodiment of the application.

Fig. 6 is a schematic structural diagram of an elastic return mechanism according to an embodiment of the present application.

Fig. 7 is a schematic overall structure diagram of the telescopic rod of the embodiment of the present application.

Description of reference numerals:

1. constructing a slot; 2. extruding and expanding frames; 3. a boom; 4. a source of rotational power; 5. extruding and expanding rods; 6. a horizontal telescopic power source; 7. a bearing plate; 8. a drive motor; 9. connecting columns; 10. a connecting bolt; 11. a drive gear; 12. a driven gear; 13. a hinge ear; 14. a hinge hole; 15. a hinge pin; 16. an upper diagonal rod; 17. a middle vertical rod; 18. a lower diagonal rod; 19. a polished rod bolt; 20. a first jack; 21. a second jack; 22. an elastic reset mechanism; 23. a telescopic rod; 24. a return spring; 25. a first mounting plate; 26. a second mounting plate; 27. an outer loop bar; 28. an inner slide bar; 29. a sliding groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

Referring to fig. 1, the groove wall of the construction groove 11 of the segmental underground diaphragm wall is grooved to form segments, which generally include a bottom segment and a middle segment, the cross section of the bottom segment is rectangular and trapezoidal at the top end of the rectangle, and the cross section of the middle segment is rectangular and trapezoidal at the vertical two ends of the rectangle.

Referring to fig. 2, the construction device for extruding and scraping the sections of the segmental underground diaphragm wall into the groove comprises an extruding and expanding frame 2, a hanging rod 3 which is used for being connected with a hoisting device and sending the extruding and expanding frame 2 into the construction groove 1, and a rotating power source 4 which is connected between the extruding and expanding frame 2 and the hanging rod 3 and is used for driving the extruding and expanding frame 2 to rotate around the axis of the hanging rod 3.

The squeezing and expanding frame 2 comprises two squeezing and expanding rods 5 which are spaced from each other and a horizontal telescopic power source 6 which is connected between the two squeezing and expanding rods 5, the shapes of the squeezing and expanding rods 5 are matched with the shape of a section groove body of the underground diaphragm wall, and the horizontal telescopic power source 6 can drive the two squeezing and expanding rods 5 to move away from or approach to each other.

The squeezing and expanding frame 2 is sent into the construction groove 1 through the hanging rod 3, the squeezing and expanding rod 5 is enabled to be abutted against the corresponding groove wall of the construction groove 1 through the horizontal telescopic power source 6, so that the squeezing and expanding rod 5 applies load to the soil body of the groove wall of the construction groove 1 to enable the soil body to be subjected to plastic deformation, then the rotating power source 4 is started, the squeezing and expanding frame 2 is enabled to rotate, and the squeezing and expanding rod 5 can extrude the soil body of the groove wall of the construction groove 1 when rotating.

After the two extruding and expanding rods 5 are driven to move back and forth and abut against the soil body by the aid of the horizontal telescopic power source 6 for multiple times, and then the extruding and expanding rods 5 are driven to rotate by the aid of the rotating power source 4, sections of the segmental underground continuous wall are gradually formed, and the soil body on the side walls of the sections becomes compact. Compared with the joint construction of the related technology, the step of cutting soil is reduced, and the generation of dregs caused by soil cutting is reduced, so that the joint construction of the joint-shaped underground diaphragm wall is safer, more convenient and more economic.

Referring to fig. 2 and 3, the rotary power source 4 includes a receiving plate 7 fixedly connected to the bottom end of the boom 3, a driving motor 8 connected to the receiving plate 7, a connecting post 9 connected to the receiving plate 7, and a linkage member connected between an output shaft of the driving motor 8 and the connecting post 9. The drive motor 8 is a servo motor.

The bearing plate 7 is horizontally arranged, and the middle part of the upper surface of the bearing plate 7 is coaxially welded and fixed with the suspender 3. The driving motor 8 is fixedly connected to the upper surface of the bearing plate 7, and an output shaft of the driving motor 8 vertically penetrates through the bearing plate 7. Bear driving motor 8 through accepting board 7, can reduce driving motor 8 and directly receive the vertical load of crowded frame 2 transmission that expands to guarantee driving motor 8's life.

The spliced pole 9 is coaxial to be rotated and is inlayed and locate the lower surface of accepting board 7, and top lateral wall a week fixedly connected with of spliced pole 9 rotates the turn-ups, and spliced pole 9 corresponds the setting with jib 3 is coaxial.

The bottom end side wall of the connecting column 9 is also fixedly connected with two hinge lugs 13, the hinge lugs 13 are radially arranged along the connecting column 9, a through hinge hole 14 is formed in each hinge lug 13, and the axis of each hinge hole 14 is perpendicular to the connecting column 9.

The linkage component comprises a driving gear 11 coaxially and fixedly connected to the bottom end of the output shaft of the de-driving motor 8 and a driven gear 12 coaxially and fixedly connected to the peripheral side wall of the connecting column 9, and the driving gear 11 is meshed with the driven gear 12.

Referring to fig. 2 and 4, the expanding rod 5 comprises an upper inclined rod 16, a middle vertical rod 17 and a lower inclined rod 18 which are connected in sequence from top to bottom, and the upper inclined rod 16, the middle vertical rod 17 and the lower inclined rod 18 are all tube bodies with rectangular cross sections.

The top ends of the two upper inclined rods 16 are correspondingly attached to the two hinge lugs 13 one by one, hinge pins 15 penetrate through the upper inclined rods 16, the hinge pins 15 coaxially penetrate through the hinge holes 14, and the hinge pins 15 are matched with the hinge holes 14.

One side of the top end of the middle vertical rod 17 is attached to one side of the bottom end of the upper inclined rod 16, and one side of the top end of the lower inclined rod 18 is attached to one side of the bottom end of the middle inclined rod. Polished rod bolts 19 are further arranged at two ends of the middle vertical rod 17 in a penetrating mode, the axis of each polished rod bolt 19 is parallel to the hinge pin 15, each polished rod bolt 19 is further arranged at the bottom end of the upper inclined rod 16 in a penetrating mode or at the top end of the lower inclined rod 18 in a penetrating mode, the middle vertical rod 17 is hinged to the upper inclined rod 16 through the polished rod bolts 19, the polished rod bolts 19 between the lower inclined rods 18 and the middle vertical rod 17 are disassembled, and the middle vertical rod 17 can be disassembled and separated from the lower inclined rod 18.

The lower inclined rod 18 and the middle vertical rod 17 are disassembled, so that the interference of the lower inclined rod 18 to the soil body at the bottom end of the construction groove 1 is reduced when the sections at the bottom end of the construction groove 1 are constructed, the integrity of the construction groove 1 in the construction of the sections at the bottom end is guaranteed, and the adaptability of the extruding and drawing grooving device to the shapes of the sections at different positions is improved.

Referring to fig. 2 and 5, the ends of the two lower inclined rods 18, which are away from the middle vertical rod 17, are hinged through polished rod bolts 19.

Referring to fig. 2 and 6, the horizontal telescopic power source 6 comprises a first jack 20 and a second jack 21 which are arranged along the axis of the middle vertical rod 17 at intervals, the first jack 20 is higher than the second jack 21, the first jack 20 and the second jack 21 are both bidirectional hydraulic jacks, the end of a piston rod of the first jack 20 is fixedly connected with the top end side wall of the middle vertical rod 17, and the end of a piston rod of the second jack 21 is fixedly connected with the bottom end side wall of the middle vertical rod 17.

Elastic reset mechanisms 22 are connected between the first jack 20 and the bearing plate 7 and between the second jack 21 and the hinged connection positions of the two lower inclined rods 18.

Referring to fig. 6 and 7, the elastic reset mechanism 22 includes a telescopic rod 23 and a reset spring 24 sleeved on the telescopic rod 23, one end of the telescopic rod 23 is fixedly connected with a first mounting plate 25, and the other end is provided with a second mounting plate 26. The axis of the telescopic rod 23 is parallel to the hanger rod 3, the telescopic rod 23 comprises an outer sleeve 27 and an inner slide rod 28, one end of the outer sleeve 27 is provided with a slide groove 29 arranged along the axis of the outer sleeve 27, and the inner slide rod 28 is slidably connected in the slide groove 29 and is matched with the slide groove 29.

First mounting panel 25 is laminated with the bottom one side of spliced pole 9 or the lower surface of second jack 21, wears to be equipped with connecting bolt 10 on the first mounting panel 25, and connecting bolt 10 passes the first mounting panel 25 at place and stretches into in first jack 20 or the second jack 21.

Referring to fig. 5 and 6, the second mounting plate 26 is connected to the upper surface of the first jack 20 or the polished rod bolts 19 of the two lower inclined rods 18, and the connecting bolt 10 is also inserted into the second mounting plate 26 on the upper surface of the first jack 20.

The second mounting plate 26 on the two lower inclined rods 18 is fixedly connected with the bolt head of the polished rod bolt 19 between the two lower inclined rods 18 in a welding mode.

The return spring 24 has both ends abutting between the first mounting plate 25 and the second mounting plate 26, respectively. When the piston rods of the first jack 20 and the second jack 21 are retracted, the return spring 24 is in an extended state.

When the piston rods of the first jack 20 and the second jack 21 extend out and the middle vertical rod 17 moves away from the ends of the first jack 20 and the second jack 21, the return spring 24 is extruded and deformed and generates a corresponding reaction force until the end of the inner sliding rod 28 abuts against the bottom of the sliding groove 29, so that the return spring 24 is limited to be continuously compressed, the frequent limiting state of the return spring 24 is reduced, and the service life of the return spring 24 is prolonged. The reaction force generated by the compression of the return spring 24 can provide an assisting force when the piston rods of the first jack 20 and the second jack 21 are retracted, so as to assist the quick deformation and return of the expanding frame 2.

The application relates to an implementation principle of a construction device for extruding and drawing sections of a segmental underground continuous wall into grooves, which comprises the following steps: through lengthening, hang and send jib 3, will connect and send into construction groove 1 with crowded rotary power source 4 and the crowded frame 2 that expands in 3 bottoms of jib, when crowded frame 2 that expands is located suitable height, start the flexible power supply 6 of level, order about two crowded pole 5's well montant 17 back of the body and keep away from the removal mutually to make well montant 17 to butt in construction groove 1's cell wall.

Then, the driving motor 8 is started, so that the linkage component drives the connecting column 9 to rotate, the two middle vertical rods 17 rotate, acting force is applied to the soil body on the wall of the construction groove 1 while the middle vertical rods 17 rotate, the corresponding positions gradually form sections, soil cutting operation is reduced, the soil body of the sections is compacted due to extrusion, the compactness of the soil body around the sections is improved, and the safety performance and the stability performance of the sections are improved.

A construction method of a segmental underground diaphragm wall comprises the following steps of S1, excavating a construction groove 1, and excavating the construction groove 1 on the ground according to a design drawing.

And S2, reaming to form grooves.

S2-1, extruding and expanding the bottom end of the construction tank 1, disassembling a polished rod nut between the lower inclined rod 18 and the middle vertical rod 17, separating the lower inclined rod 18 and the middle vertical rod 17, connecting the bearing plate 7 to the suspender 3, sending the extruding and expanding frame 2 to the bottom end of the construction tank 1 through lengthening and hanging the suspender 3, starting the horizontal telescopic power source 6, enabling the two middle vertical rods 17 to be away from each other until the two middle vertical rods abut against the wall of the construction tank 1, enabling the middle vertical rod 17, the upper inclined rod 16 and the lower inclined rod 18 not to be completely embedded into soil on the wall of the construction tank 1, and then starting the driving motor 8 to enable the middle vertical rod 17, the upper inclined rod 16 and the lower inclined rod 18.

And S2-2, performing extrusion and expansion work in the middle of the construction tank 1. The method comprises the steps of starting a horizontal telescopic power source 6, enabling two middle vertical rods 17 to approach to each other in opposite directions until the distance between the two middle vertical rods 17 is smaller than the width of a construction groove 1, then lifting a hanging rod 3, taking out an extruding and expanding device from the construction groove 1, installing a lower inclined rod 18 at the bottom end of the middle vertical rod 17, then hanging an extruding and expanding rod 5 into the middle of the construction groove 1, starting the horizontal telescopic power source 6, and then starting a rotary power source 4.

In step S2-2 and step S2-3, the driving motor 8 drives the connecting column 9 to rotate back and forth, and the angle of the back and forth rotation is 180-210 degrees. In the implementation of the application, the connecting column 9 is rotated by 180 degrees by the pioneer, and then the connecting column is rotated by 180 degrees in the reverse direction, so that the probability of winding the oil supply pipelines of the first hydraulic jack and the second hydraulic jack is reduced.

S2-3, measuring the squeezed groove wall. And (4) measuring the shape of the joint by adopting a sonar detection device and calibrating the joint with a design drawing.

And S2-4, repeating the steps S2-1, S2-2 and S2-3N times, wherein N is more than two and is an integer, until the formed node shape is matched with the shape size on the design drawing.

Through crowded precision that expands, calibration many times, improve crowded precision that expands to crowded the expanding will compress corresponding soil body at every turn, make the festival portion soil body of crowded position that expands more closely knit, thereby reduce the probability that festival portion soil body collapses.

And S3, pouring the reinforced concrete in the construction groove 1, lowering a reinforcement cage of the underground continuous wall, and then pouring the concrete.

The implementation principle of the construction method of the segmental underground continuous wall is as follows: the construction of the segmental underground diaphragm wall is realized through the construction steps, the segmental soil cutting construction is reduced, and the construction safety performance of extruding and expanding grooves is guaranteed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.