1. A capping beam structure, comprising:

the bent cap comprises a bent cap body, wherein a first channel is formed in the bent cap body and extends along the length direction of the bent cap body;

the stop block is internally provided with a second channel, and the second channel extends along the length direction of the cover beam main body; and

and the locking reinforcing steel bar is used for penetrating through the first channel and the second channel so as to detachably lock the stop block at one end of the cover beam main body in the length direction.

2. The capping beam structure of claim 1 wherein the stop is provided at both ends of the capping beam body in the length direction.

3. The capping beam structure of claim 2 wherein the locking reinforcing bars are disposed through the first passage, the second passage of one block and the second passage of the other block to detachably lock the two blocks to both ends of the capping beam body in the length direction.

4. A capping beam structure as claimed in any one of claims 1 to 3 wherein the locking bar is provided with two fasteners;

the two fasteners are detachably connected to two ends of the locking reinforcing steel bar respectively, and the stop block and the cover beam main body are located between the two fasteners in the length direction so as to prevent the stop block from being separated from the cover beam main body along the length direction.

5. The capping beam structure of claim 1 wherein the capping beam body is provided with a placement groove on an end surface in the length direction;

the placing groove is provided with a first abutting surface;

the stop block is provided with a first side face and a second side face which are opposite to each other in the length direction, the stop block is partially accommodated in the accommodating groove, the first side face is abutted to the first abutting face in the length direction, and the second side face is flush with the end face of the cover beam main body.

6. The capping beam structure of claim 5 wherein the placement channel further has a second abutment surface;

the terminal surface of bent cap main part the second support to the face, the first support to the face with the upper surface of bent cap main part links to each other in proper order, the bottom of dog support to lean on in the second supports to the face.

7. The capping beam structure of claim 5 wherein the first abutment surface and the end surface of the capping beam body are each provided with a shear keyway.

8. A pier, comprising:

pier studs; and

the capping beam structure of any one of claims 1 to 7 which is erected on the pier stud, the capping beam body being attached to the pier stud.

9. A method of splicing a capping beam, adapted for use in a capping beam structure as claimed in any one of claims 1 to 7, the method comprising:

removing the stop block on the main body of the bent cap;

and connecting the bent cap extension section to one end of the bent cap main body after the stop block is removed.

10. The method of splicing together a capping beam as claimed in claim 9, wherein a third channel is formed in the extension of the capping beam extending in the length direction;

the one end of connecting the bent cap extension section in the bent cap main part after dismantling the dog includes:

the locking reinforcing steel bars are arranged in the first channel and the third channel in a penetrating mode;

connecting two fasteners to two ends of the locking reinforcing steel bar respectively in a detachable manner, so that the cover beam extension section and the cover beam main body are positioned between the two fasteners in the length direction, and the cover beam extension section is prevented from being separated from the cover beam main body in the length direction;

tensioning prestressed reinforcement between the capping beam extension and the capping beam body to secure the capping beam extension to the capping beam body;

removing the fastener;

and removing the locking reinforcing steel bars.

Background

With the leap-type development of bridge construction and road construction in China in recent years, the beam bridge is widely applied. The bridge pier of the bridge comprises a cover beam and a pier stud, the cover beam is erected on the pier stud, and the bridge deck of the bridge is placed on the cover beam. At present, the development of the full-prefabricated integration of the existing beam bridge is a trend, and the construction and construction are carried out by widely adopting prefabricated and standardized bridge components. However, in order to meet both the traffic development requirement and the initial investment scale, part of bridges or urban viaducts need to be built in stages and widened in the later stage, so that the piers need to be widened to meet the construction requirement. However, the bridge pier in the prior art is limited by the construction environment when the bridge is widened in the later period, and is not beneficial to implementation, high in construction difficulty, and more in field construction processes and required auxiliary equipment, so that the construction period is not shortened, and the construction cost is not reduced.

Disclosure of Invention

The embodiment of the application provides a bent cap structure, a pier and a method for splicing the bent caps, and aims to solve the problems that the construction difficulty of the existing pier is large and the construction cost is high when the existing pier is widened in the later period.

In a first aspect, an embodiment of the present application provides a capping beam structure, including a capping beam main body, a stopper, and a locking reinforcement; a first channel is formed in the bent cap main body and extends along the length direction of the bent cap main body; a second channel is formed in the stop block and extends along the length direction of the cover beam main body; the locking reinforcing steel bar is used for penetrating through the first channel and the second channel, so that the stop block can be detachably locked at one end of the cover beam main body in the length direction.

In the technical scheme, the first channel and the second channel are respectively arranged in the cover beam main body and the stop block, so that the locking reinforcing steel bars can be detachably connected to the cover beam main body after penetrating through the first channel and the second channel, and the detachable connection between the stop block and the cover beam main body is realized. Adopt the bent cap structure of this kind of structure when the later stage is widened, be convenient for demolish the dog on the one hand, the engineering time has been saved, and easy operation, on the other hand provides reservation and convenient interim consolidation condition when the later stage is widened for the bent cap structure, so that the bent cap structure can be paid on the bent cap main part with the part that needs widen detachably ground lock through locking the reinforcing bar, thereby can reduce required auxiliary assembly when the bent cap structure is under construction in the later stage, and reduced the construction degree of difficulty of bent cap structure when the later stage is widened, and then be favorable to shortening construction cycle and reducing engineering cost.

In addition, the bent cap structure provided by the embodiment of the application also has the following additional technical characteristics:

in some embodiments, the stop is provided at both ends of the bent cap body in the length direction.

In the technical scheme, the stop blocks of the structure are arranged at the two ends of the cover beam main body in the length direction, so that the two ends of the cover beam main body can be widened in the later period, and more widening requirements of the cover beam structure in the later-period construction can be met.

In some embodiments, the locking reinforcing bars are used for being arranged in the first channel, the second channel of one block and the second channel of the other block in a penetrating mode, so that the two blocks can be detachably locked at two ends of the cover beam main body in the length direction respectively.

In the technical scheme, the two ends of the locking reinforcing steel bars are respectively penetrated and arranged in the second channels of the two check blocks positioned at the two ends of the cover beam main body, so that the two check blocks and the cover beam main body are detachably connected through the same locking reinforcing steel bar, and the cover beam structure adopting the structure has higher stability and is convenient for construction.

In some embodiments, two fasteners are arranged on the locking reinforcing steel bar; the two fasteners are detachably connected to two ends of the locking reinforcing steel bar respectively, and the stop block and the cover beam main body are located between the two fasteners in the length direction so as to prevent the stop block from being separated from the cover beam main body along the length direction.

In the technical scheme, the both ends of the reinforcing bar are detachably connected with the fasteners respectively, and the stopper and the bent cap main body are located between the two fasteners in the length direction of the bent cap main body, so as to detachably lock the stopper on the bent cap main body, that is to say, the fastener is connected to the two ends of the reinforcing bar respectively after penetrating through the first channel and the second channel, so as to limit the stopper and the bent cap main body between the two fasteners, so as to prevent the stopper from breaking away from the bent cap main body along the length direction of the bent cap main body, and further realize that the stopper is detachably locked on the bent cap main body, so as to widen the temporary anchoring structure in construction in later stage.

In some embodiments, the end face of the bent cap main body in the length direction is provided with a placing groove; the placing groove is provided with a first abutting surface; the stop block is provided with a first side face and a second side face which are opposite to each other in the length direction, the stop block is partially accommodated in the accommodating groove, the first side face is abutted to the first abutting face in the length direction, and the second side face is flush with the end face of the cover beam main body.

In the technical scheme, the placing groove is formed in the end face of the cover beam main body in the length direction, the stop block is placed in the placing groove, the second side face of the stop block is arranged to be flush with the end face of the cover beam main body, the cover beam structure with the structure is convenient to construct the stop block, the locking reinforcing steel bars are arranged in the second channel of the stop block in a penetrating mode, the stop block is locked on the cover beam main body, and the cover beam is beneficial to guaranteeing that the appearance of the cover beam is neat and attractive.

In some embodiments, the placement channel further has a second abutment surface; the terminal surface of bent cap main part the second support to the face, the first support to the face with the upper surface of bent cap main part links to each other in proper order, the bottom of dog support to lean on in the second supports to the face.

In above-mentioned technical scheme, the standing groove still has the second that supplies the bottom of dog to lean on and leans on the face to be favorable to improving the structural stability and the bearing capacity of dog. In addition, the terminal surface of bent cap main part, the second lean on face, the first upper surface that leans on face and bent cap main part to link to each other in proper order and form cascaded structure to make the bent cap structure can provide good concatenation face when the later stage is widened, the bent cap structure that adopts this kind of structure is favorable to improving the bearing capacity that shears of the part of widening when the later stage is widened.

In some embodiments, the first abutment surface and the end surface of the cap beam body each define a shear keyway.

In above-mentioned technical scheme, through set up on the first terminal surface that leans on face and bent cap main part and supply shear force key male shear force keyway to can widen for the later stage of bent cap structure and provide the reservation, need not to reset shear force keyway, and then be favorable to reducing the construction degree of difficulty and reducing the work procedure.

In a second aspect, an embodiment of the present application further provides a pier, including a pier stud and the capping beam structure; the bent cap structure is erected on the pier stud, and the bent cap main body is connected to the pier stud.

In the technical scheme, the pier with the bent cap structure is convenient for widening construction in the later period, reduces the construction difficulty of the pier when widening in the later period, saves construction time, can reduce auxiliary equipment required in later period construction, and is favorable for shortening construction period and reducing construction cost when widening in the later period.

In a third aspect, an embodiment of the present application further provides a method for splicing a capping beam, including:

removing the stop block on the main body of the bent cap;

and connecting the bent cap extension section to one end of the bent cap main body after the stop block is removed.

In addition, the splicing method of the bent cap provided by the embodiment of the application also has the following additional technical characteristics:

in some embodiments, a third channel is formed in the lid beam extension extending in the length direction;

the one end of connecting the bent cap extension section in the bent cap main part after dismantling the dog includes:

the locking reinforcing steel bars are arranged in the first channel and the third channel in a penetrating mode;

connecting two fasteners to two ends of the locking reinforcing steel bar respectively in a detachable manner, so that the cover beam extension section and the cover beam main body are positioned between the two fasteners in the length direction, and the cover beam extension section is prevented from being separated from the cover beam main body in the length direction;

tensioning prestressed reinforcement between the capping beam extension and the capping beam body to secure the capping beam extension to the capping beam body;

removing the fastener;

and removing the locking reinforcing steel bars.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a bridge pier provided in an embodiment of the present application;

fig. 2 is a sectional view of the pier shown in fig. 1;

fig. 3 is a partially enlarged view of a portion a of the pier shown in fig. 2;

fig. 4 is a cross-sectional view of the body of the capping beam structure of fig. 2;

fig. 5 is a flowchart of a method for splicing the capping beams according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a widened bridge pier provided in the embodiment of the present application;

fig. 7 is a sectional view of the widened pier shown in fig. 6;

fig. 8 is a partially enlarged view of the widened pier shown in fig. 7 at a point B;

fig. 9 is a flowchart of a step S200 of the method of splicing the capping beam shown in fig. 5;

figure 10 is a cross-sectional view of the lid beam extension of figure 7;

fig. 11 is a flowchart of a method for splicing the capping beams according to some embodiments of the present disclosure.

Icon: 100-bridge pier; 10-pier stud; 20-capping beam construction; 21-a capping beam body; 211 — a first channel; 212-a first steel tube; 213-placing grooves; 2131-a first abutting surface; 2132-a second abutting surface; 214-shear key slot; 22-a stop block; 221-a second channel; 222-a second steel tube; 23-locking reinforcing steel bars; 24-a fastener; 200-widened bridge pier; 30-bent cap extension section; 31-a third channel; 32-a third steel tube; 33-shear key.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Examples

The embodiment of the application provides a pier, it can improve present pier and be subject to the construction environment when the later stage is widened, is unfavorable for implementing, and the construction degree of difficulty is high, and the auxiliary assembly of site operation process and needs is more to be unfavorable for shortening the construction cycle and reducing engineering cost scheduling problem, the following concrete structure that combines the figure to describe in detail the pier.

As shown in fig. 1, the pier 100 includes a pier stud 10 and a capping structure 20. The bent cap structure 20 is erected on the pier stud 10, and the bent cap main body 21 is connected to the pier stud 10.

Illustratively, the pier 100 is a portal pier structure, the number of the pier studs 10 is two, the two pier studs 10 are arranged at intervals along the length direction of the capping beam structure 20, and the capping beam structure 20 is erected on the two pier studs 10.

The pier column 10 and the capping beam structure 20 can be manufactured in a cast-in-place mode, and can also be of a prefabricated structure, namely a prefabricated concrete structure (prefabricated concrete structure), which is called as a prefabricated structure for short, the pier column 10 and the capping beam structure 20 adopting the structure can better meet the requirements of green construction on land saving, energy saving, material saving, water saving, environmental protection and the like, the negative effects on the environment are reduced, including noise reduction, dust raising prevention, environmental pollution reduction, clean transportation, field interference reduction, water saving, electricity saving, material saving and other resources and energy sources, and the sustainable development principle is followed.

In this embodiment, as shown in fig. 2 and 3, the capping beam structure 20 includes a capping beam main body 21, a stopper 22, and a locking bar 23. A first channel 211 is formed in the mantle body 21, the first channel 211 extending in the length direction of the mantle body 21. The stopper 22 has a second passage 221 formed therein, and the second passage 221 extends in the longitudinal direction of the bent main body 21. The locking reinforcing bar 23 is arranged in the first channel 211 and the second channel 221 in a penetrating mode, so that the stop block 22 can be detachably locked at one end of the cover beam main body 21 in the length direction.

The detachable connection between the stopper 22 and the main body 21 of the bent cap is realized by respectively arranging the first channel 211 and the second channel 221 in the main body 21 of the bent cap and the stopper 22 so that the stopper 22 can be detachably connected to the main body 21 of the bent cap after the locking reinforcing steel bar 23 is arranged in the first channel 211 and the second channel 221 in a penetrating way. When the capping beam structure 20 adopting the structure is widened at the later stage, on one hand, the stop block 22 is convenient to remove, the construction time is saved, the operation is simple, on the other hand, a reserved and convenient temporary consolidation condition is provided for the capping beam structure 20 when the capping beam structure is widened at the later stage, so that the capping beam structure 20 can detachably lock the part needing to be widened on the capping beam main body 21 through the locking reinforcing steel bars 23, the auxiliary equipment required when the pier 100 is constructed at the later stage can be reduced, the construction difficulty of the pier 100 when the pier 100 is widened at the later stage is reduced, and the construction period and the extension cost of the pier 100 are favorably shortened when the pier 100 is widened at the later stage.

A first steel pipe 212 extending along the length direction of the main body 21 is embedded in the main body 21, and a pipe cavity of the first steel pipe 212 is a first channel 211. A second steel pipe 222 extending in the longitudinal direction of the bent main body 21 is embedded in the stopper 22, and a pipe cavity of the second steel pipe 222 is a second passage 221. The first channel 211 and the second channel 221 having such a structure are easy to implement and have high structural stability.

Illustratively, two layers of first steel pipes 212 are embedded in the bent cap main body 21 in the height direction of the bent cap main body 21, and each layer of first steel pipes 212 is provided with a plurality of first steel pipes 212 arranged at intervals in the width direction of the bent cap main body 21. Similarly, two layers of second steel pipes 222 are embedded in the block 22, and the second steel pipes 222 are in one-to-one correspondence with and are communicated with the first steel pipes 212. In other embodiments, the first steel pipe 212 provided in the bent main body 21 may be one, three, four, or five layers, or the like, and of course, only one first steel pipe 212 may be provided.

Further, as shown in fig. 2 and 3, the bent main body 21 is provided with stoppers 22 at both ends in the longitudinal direction thereof. Both ends on bent cap main part 21 length direction all are provided with the dog 22 of this kind of structure to be favorable to the later stage to widen the both ends of bent cap main part 21, with the demand of widening more in satisfying bent cap structure 20 construction later stage.

The locking reinforcing bars 23 are arranged in the first channel 211, the second channel 221 of one stopper 22 and the second channel 221 of the other stopper 22, so that the two stoppers 22 can be detachably locked at two ends of the main body 21 of the bent cap in the length direction.

The two ends of the locking reinforcing steel bar 23 penetrate through the second channels 221 of the two stop blocks 22 at the two ends of the bent cap main body 21 respectively, so that the two stop blocks 22 and the bent cap main body 21 are detachably connected through the same locking reinforcing steel bar 23, and the bent cap structure 20 adopting the structure is high in stability and convenient to construct.

Illustratively, the lock reinforcement 23 is finish-rolled deformed steel.

Optionally, two fasteners 24 are provided on the locking rebar 23. Two fastening pieces 24 are detachably attached to both ends of the locking bar 23, respectively, and the stopper 22 and the capping body 21 are positioned between the two fastening pieces 24 in the length direction of the capping body 21 to prevent the stopper 22 from being separated from the capping body 21 in the length direction of the capping body 21. The both ends of the reinforcing bar 23 are connected with the fasteners 24 respectively detachably, and the stopper 22 and the bent cap main body 21 are located between two fasteners 24 in the length direction of the bent cap main body 21, so as to lock the stopper 22 on the bent cap main body 21 detachably, that is, the fastener 24 is connected after the first channel 211 and the second channel 221 are respectively penetrated and arranged at the both ends of the reinforcing bar 23, so as to limit the stopper 22 and the bent cap main body 21 between two fasteners 24, so as to prevent the stopper 22 from breaking away from the bent cap main body 21 along the length direction of the bent cap main body 21, and further realize that the stopper 22 is locked on the bent cap main body 21 detachably, so as to be used as a temporary anchoring structure for later-stage widening construction.

Illustratively, the fasteners 24 are nuts screwed on the ends of the locking reinforcing bars 23, and the nuts at the two ends of the locking reinforcing bars 23 can be screwed to make the two nuts abut against the end surfaces of the corresponding stoppers 22, so that the two stoppers 22 abut against the two ends of the bent cap body 21, respectively, to realize the detachable locking of the two stoppers 22 on the bent cap body 21.

It should be noted that, in other embodiments, the capping beam structure 20 may also be another structure, for example, the stopper 22 and the two ends of the locking reinforcing bar 23 are provided with a hole for inserting the locking pin, after the locking reinforcing bar 23 is inserted into the first channel 211 and the second channel 221 of the two stoppers 22, the stopper 22 can be limited from being separated from the capping beam body 21 along the length direction of the capping beam body 21 by inserting the locking pin into the stopper 22 and the locking reinforcing bar 23, so as to detachably lock the two stoppers 22 to the capping beam body 21.

Optionally, first bonding pieces are arranged between the two stoppers 22 and the capping beam main body 21, so that on one hand, the connection strength between the stoppers 22 and the capping beam main body 21 is improved, and on the other hand, a connection gap between the stoppers 22 and the capping beam main body 21 can be eliminated.

Illustratively, the first adhesive is epoxy mortar convexly disposed between the stopper 22 and the capping beam body 21.

In this embodiment, as shown in fig. 3 and 4, the capping beam main body 21 is provided with placing grooves 213 on both end surfaces in the length direction thereof, the placing grooves 213 are used for accommodating the stoppers 22, and the placing grooves 213 penetrate through the upper surface of the capping beam main body 21. The placement groove 213 has a first abutment surface 2131. The stopper 22 has a first side surface and a second side surface opposite to each other in the longitudinal direction, the stopper 22 is partially accommodated in the accommodating groove 213, the first side surface abuts against the first abutting surface 2131 in the longitudinal direction of the lintel main body 21, and the second side surface is flush with the end surface of the lintel main body 21.

By arranging the placing groove 213 on the end surface of the main body 21 in the length direction of the bent cap, so as to place part of the stopper 22 in the placing groove 213, the upper end of the stopper 22 extends out of the upper surface of the main body 21 of the bent cap, and the second side surface of the stopper 22 is arranged to be flush with the end surface of the main body 21 of the bent cap, the bent cap structure 20 adopting the structure is convenient for constructing the stopper 22 on one hand, so as to penetrate the locking reinforcing steel bar 23 into the second channel 221 of the stopper 22 and lock and attach the stopper 22 on the main body 21 of the bent cap, and on the other hand, the appearance of the bent cap is ensured to be neat and beautiful.

Wherein the placement groove 213 further has a second abutment surface 2132. The end surface of the main body 21 of the bent cap, the second abutting surface 2132, the first abutting surface 2131 and the upper surface of the main body 21 of the bent cap are connected in sequence, and the bottom end of the stop 22 abuts against the second abutting surface 2132. The placement groove 213 further has a second abutting surface 2132 against which the bottom end of the stopper 22 abuts, thereby contributing to the improvement of the structural stability and the load-bearing capacity of the stopper 22. In addition, the terminal surface of the bent cap main body 21, the second abutting surface 2132, the first abutting surface 2131 and the upper surface of the bent cap main body 21 are sequentially connected to form a stepped structure, so that a good splicing surface can be provided when the bent cap structure 20 is widened at the later stage, the widened part can be lapped with the placing groove 213, and the bent cap structure 20 adopting the structure is beneficial to improving the shearing resistance and bearing capacity of the widened part when the bent cap structure 20 is widened at the later stage.

Further, the first abutting surface 2131 and the end surface of the cap beam main body 21 are both provided with a shear key groove 214. Through set up on the terminal surface that supports face 2131 and bent main part 21 at first, supply shear force key groove 214 that shear force key 33 inserted to can widen for the later stage of bent structure 20 and provide the reservation, need not to reset shear force key groove 214, and then be favorable to reducing the construction degree of difficulty and reducing the construction process.

In addition, an embodiment of the present application further provides a method for splicing a capping beam, which is applicable to the capping beam structure 20 described above, and as shown in fig. 5 and fig. 6, the method for splicing the capping beam includes:

s100: the stop 22 on the main body 21 of the bent cap is removed;

s200: the capping extension 30 is attached to the end of the capping body 21 where the stop 22 is removed.

Fig. 6 is a schematic structural diagram of the widened pier 200, and after the stopper 22 is removed, the bent cap extension 30 is spliced with the bent cap main body 21 to widen the pier 100. The one end that the bent cap extension 30 and bent cap main part 21 splice is cascaded structure to make the part overlap joint of bent cap extension 30 in standing groove 213, this kind of structure is favorable to improving the shear-resistant bearing capacity of bent cap extension 30.

In this embodiment, as shown in fig. 7 and 8, a plurality of third channels 31 extending in the length direction are formed in the capping beam extension 30, and the third channels 31 correspond to the first channels 211 arranged on the capping beam main body 21 one to one.

Illustratively, the capping beam extension 30 is a prefabricated structure.

Illustratively, a plurality of third steel pipes 32 extending along the length direction of the bent cap main body 21 are embedded in the bent cap extension 30, and the lumens of the third steel pipes 32 are third channels 31.

Further, as shown in fig. 9, S200: attaching the bent cap extension 30 to the bent cap body 21 at the end where the stopper 22 is removed includes:

s210: the locking reinforcing steel bar 23 is arranged in the first channel 211 and the third channel 31 in a penetrating way (as shown in fig. 7);

s220: detachably connecting two fasteners 24 to both ends of the locking bar 23, respectively, so that the capping extension 30 and the capping body 21 are located between the two fasteners 24 in the length direction, to prevent the capping extension 30 from being separated from the capping body 21 in the length direction (as shown in fig. 8);

s230: tensioning prestressed reinforcement between the capping beam extension 30 and the capping beam main body 21 to fasten the capping beam extension 30 to the capping beam main body 21;

s240: removing the fasteners 24;

s250: the locking bar 23 is removed (as shown in fig. 6).

As shown in fig. 8 and 10, two shear keys 33 are convexly arranged at one end of the bent cap extension 30 spliced with the bent cap main body 21, the shear keys 33 correspond to the shear key slots 214 arranged at one end of the bent cap main body 21 one by one, and each shear key 33 is inserted into one shear key slot 214, so that the phenomenon of longitudinal displacement between the bent cap extension 30 and the bent cap main body 21 is prevented, and the shear bearing capacity of the bent cap extension 30 is improved.

Illustratively, the prestressed reinforcement is finish-rolled deformed steel bar.

Further, as shown in fig. 9, at S250: after removing the locking bar 23, S200 further includes:

s260: slurry is poured into the third channel 31 and the first channel 211 to block the third channel 31 and the first channel 211.

Illustratively, the slurry is one of epoxy mortar or concrete, and the like.

In some embodiments, as shown in fig. 11, at S200: before the bent cap extension 30 is connected to the end of the bent cap main body 21 after the stopper 22 is removed, the splicing method further comprises the following steps:

s300: a second adhesive is applied between the lid beam extension 30 and the lid beam body 21.

That is, before the capping extension 30 is completed with the capping body 21, a second adhesive is provided on an interface between the capping extension 30 and the capping body 21 to improve the coupling strength of the capping extension 30 with the capping body 21.

Illustratively, the second adhesive is epoxy mortar.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.