A foundation pit support structure for wall-up and pile-down construction

Abstract

This invention relates to the field of building support structure technology. The invention discloses a foundation pit support structure for upper wall and lower pile construction, comprising a reinforcing cage. The reinforcing cage has symmetrically arranged locking pipes on both sides, located within placement grooves. Several horizontal reinforcing bars are evenly spaced within the reinforcing cage, with both ends extending into adjacent placement grooves. Each horizontal reinforcing bar has a reinforcing locking device attached to the outer wall of the locking pipe at both ends. A connecting damping device is located at the center of the reinforcing cage. Limiting frames are symmetrically arranged on both sides of the connecting damping device at the top of the reinforcing cage, and grouting pipes are located within the limiting frames. Through the operation of the reinforcing locking device and the connecting damping device, this invention provides further support to the inner walls of the grooves on both sides of the reinforcing cage when the locking pipes are pulled out, and further solidifies the concrete within the reinforcing cage when the grouting pipes are pulled out, thus greatly improving the strength and stability of the retaining structure.

Description

Technical Field

[0001] This invention relates to the field of building support structure technology, specifically to a foundation pit support structure for upper wall and lower pile construction. Background Technology

[0002] With the continuous development of cities, the utilization rate of underground space is getting higher and higher, and the construction of the retaining structure of underground space is also receiving more and more attention. Among various retaining structures, continuous walls are highly efficient, have a short construction period, reliable quality, and high economic benefits. Continuous walls are no longer simply used as anti-seepage and waterproof walls or deep foundation pit retaining walls, but are also walls that can withstand greater loads, making them more efficient and improving stability.

[0003] In existing technologies, workers typically place reinforcing cages and grouting pipes at intervals within the slots of a guide wall, then pour concrete into the reinforcing cages to form a diaphragm wall within the guide wall. After placing the reinforcing cages, workers usually place interlocking pipes at both ends of the cages to prevent water seepage and to prevent the slots from collapsing. After the concrete is poured, the interlocking pipes and grouting pipes are pulled out to form a continuous diaphragm wall. However, when the interlocking pipes are pulled out, a brief gap forms between the side of the reinforcing cage and the inner wall of the slot, making it easy for the inner wall of the slot to collapse before the concrete has fully solidified, resulting in insufficient retaining strength. At the same time, when the grouting pipes are pulled out, gaps also form between the concrete within the reinforcing cage, resulting in insufficient compaction of the concrete within the reinforcing cage, thus affecting the stability of the diaphragm wall and causing low stability. Therefore, a device is needed that can further support the inner walls of the slots on both sides of the reinforcing cage when the interlocking pipes are pulled out and further solidify the concrete within the reinforcing cage when the grouting pipes are pulled out to avoid insufficient retaining strength and low stability. Summary of the Invention

[0004] The purpose of this invention is to provide a foundation pit support structure for upper wall and lower pile construction, to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a foundation pit support structure for upper wall and lower pile construction, comprising a reinforcing cage, wherein locking pipes are symmetrically arranged on both sides of the reinforcing cage and located in placement grooves, wherein a plurality of horizontal reinforcing bars are equidistantly arranged in the reinforcing cage, and both ends of the horizontal reinforcing bars extend into adjacent placement grooves, wherein each end of the horizontal reinforcing bar is provided with a reinforcing locking device attached to the outer wall of the locking pipe, wherein a connecting damping device is provided at the center of the reinforcing cage, wherein limiting frames are symmetrically arranged on both sides of the connecting damping device and located at the top of the reinforcing cage, wherein a grouting pipe is provided in the limiting frame and the side end of the grouting pipe is located on the connecting damping device, wherein the reinforcing locking device comprises an extension support component and a trigger component, wherein the extension support component is disposed on one end of the horizontal reinforcing bar, and the trigger component is disposed within the extension support component.

[0005] Preferably, the extension support assembly includes a connecting frame, the side end of which is fixedly connected to the end of a horizontal reinforcing bar. The connecting frame is hollow and has a through-hole at the end away from the horizontal reinforcing bar. A supporting reinforcing bar is slidably disposed inside the connecting frame. The end of the supporting reinforcing bar away from the through-hole is movably connected to the inner side wall of the connecting frame via a tension spring. The supporting reinforcing bar is hollow and has an open end near the through-hole. A movable member is disposed inside the supporting reinforcing bar, and the end of the movable member away from the through-hole is fixedly connected to the inner side wall of the supporting reinforcing bar. An S-shaped elastic member is fixedly connected to the side of the movable member near the through-hole. A protrusion is fixedly connected to the top of the S-shaped elastic member. The top of the protrusion passes through the top of the supporting reinforcing bar through a slot and abuts against the inner wall of a locking groove opened at the top of the connecting frame.

[0006] Preferably, the triggering component includes a retaining plate, the top of which is fixedly connected to the bottom of an S-shaped elastic element. A moving groove is provided on the retaining plate, and the bottom of the moving groove is inclined. A trigger element is slidably disposed on the end of the supporting steel bar near the through-hole. A slope block is fixedly connected to the side end of the trigger element near the retaining plate. The slope end of the slope block abuts against the inclined surface at the bottom of the moving groove. The side end of the slope block is movably connected to the side wall of the supporting steel bar through a compression spring. An activation block is fixedly connected to the side end of the locking tube. Openings for the activation block to pass through are provided on both the upper and lower sides of the connecting frame. The end of the trigger element away from the retaining plate is arc-shaped and flush with the side end of the through-hole of the supporting steel bar. When the activation block moves into the connecting frame through the opening, the side end of the activation block can abut against the arc-shaped surface of the trigger element.

[0007] Preferably, the end of the connecting frame near the locking tube is set with an arc opening.

[0008] Preferably, the connecting damping device includes a connecting component and an unlocking vibration component. The connecting component is disposed inside the reinforcing cage, and the unlocking vibration component is disposed on the connecting component. The connecting component includes longitudinal reinforcing bars, and there are two longitudinal reinforcing bars. The two longitudinal reinforcing bars are symmetrically disposed at the center of the reinforcing cage and are respectively located at the side end of a limiting frame. The upper and lower ends of the longitudinal reinforcing bars are respectively fixedly connected to the reinforcing cage. A connecting bar is fixedly connected to the adjacent side of the two longitudinal reinforcing bars. The two connecting bars are arranged in a figure-eight shape, and the adjacent ends of the two connecting bars are hinged. The hinged ends of the two connecting bars are located at the center of the entire reinforcing cage.

[0009] Preferably, the unlocking vibration assembly includes two fixing plates. The top of each fixing plate is fixedly connected to the bottom of each connecting rib. The adjacent ends of the two fixing plates are movably connected by a return spring. Each connecting rib has a through groove at its top, which is inclined toward the hinge of the connecting rib. An inclined clamping plate is slidably provided in the through groove. The top of the inclined clamping plate is fixedly connected to the side end of the grouting pipe through a connecting plate.

[0010] Preferably, the inner wall of the limiting frame is covered with a damping pad.

[0011] Preferably, a waterproof seal is laid on the outside of the lock tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] In this invention, when using this device, the operator first vertically places the reinforcing cage and interlocking pipes into the groove of the guide wall. The interlocking pipes installed on both sides of the reinforcing cage prevent water seepage into the groove, thus avoiding interference with concrete pouring, and provide support to both sides of the groove's inner wall. Then, the operator adjusts the distance between the bottom end of the grouting pipe and the bottom of the groove within the limiting frame to facilitate concrete injection. During the adjustment process, the connecting damping device is activated, providing a tensioning force towards the center on both sides of the reinforcing cage. Concrete is then poured into the reinforcing cage through the grouting pipe. After pouring, the interlocking pipes on both sides of the reinforcing cage are pulled out. During the pulling out of the interlocking pipes, a trigger component drives the extension support component at the end of each horizontal reinforcing bar, thereby driving the extension support component at the bottommost horizontal reinforcing bar to... The process involves sequentially moving the grouting pipe upwards, providing further support to the gaps between the rebar holes and the inner wall of the slot during the removal of the locking pipe. This prevents the inner wall of the slot from collapsing before the concrete has fully solidified, thus increasing the strength of the retaining wall. Simultaneously, when the grouting pipe is pulled out, the integrated shock-absorbing device causes slight vibration of the entire rebar cage, resulting in shaking of the concrete inside the cage and further coagulation. This prevents the concrete at the insertion point of the grouting pipe from being insufficiently filled after its removal, which could affect the stability of the continuous wall formation and improve overall stability. Therefore, this method achieves the effect of further supporting the inner walls of the slot on both sides of the rebar cage when the locking pipe is pulled out and further coagulating the concrete inside the rebar cage when the grouting pipe is pulled out, thus avoiding insufficient retaining wall strength and low stability.

[0014] In this invention, after the worker finishes pouring concrete and pulls out the locking tube, the activation clip at the side end of the locking tube sequentially passes through the opening of each horizontal rebar side-end connecting frame, and moves upward from the bottommost connecting frame opening to the outside of the rebar cage. Each time the activation clip passes through an opening of a connecting frame, the arc-shaped surface of the trigger element creates a certain squeezing force on the trigger element, causing it to move towards the locking plate. This causes the sloped end of the ramp block to abut against the inner bottom of the moving groove. During this movement, the locking plate moves downward and simultaneously compresses the spring. The movable part causes the supporting rebar to be squeezed against the inner side wall of the connecting frame through the tension spring. As the locking plate moves downward, the protrusion slides downward along the inner wall of the slot, thus limiting the movement direction of the locking plate. When the top of the protrusion moves below the locking groove, the activation clip... The S-shaped elastic element and movable element release the restriction on the tension spring and simultaneously drive the supporting steel bar to pop out through the through-hole, so that one end of the supporting steel bar abuts against the inner wall of the guide wall slot. This provides further support to the gap formed between the steel bar hole and the inner wall of the slot during the removal of the locking pipe, thereby avoiding the possibility of the inner wall of the slot collapsing before the concrete has fully solidified, improving the retaining strength. Furthermore, the sequential pop-out design can prevent a certain amount of concrete from being brought out when the grouting pipe is pulled out, further preventing concrete overflow. It effectively blocks the concrete brought out when the grouting pipe is pulled out to a certain length below the supporting steel bar. After the grouting pipe and the activation block are away from the connecting frame, the trigger element returns to the inside of the supporting steel bar through the compression spring, thereby avoiding the problem of insufficient support force provided by the supporting steel bar due to the hollow setting of the supporting steel bar, further improving stability.

[0015] In this invention, the arc-shaped opening allows the side end of the connecting frame to better fit the side end of the locking tube, and when the locking tube is pulled out, the locking tube can always move along the side end of the connecting frame. This provides a limit while allowing the locking tube to trigger each extension support component, thus improving the stability of the device operation.

[0016] In this invention, when workers adjust the position of the grouting pipe using a limiting frame according to the groove depth, the grouting pipe is controlled to move closer to the bottom of the groove. This causes the inclined clamping plate on the connecting plate to move downwards within the through groove. This, in turn, causes the two connecting bars, with their hinge points as the base, to move closer together at their far ends, creating a resisting force on the connecting bars. This causes the two longitudinal reinforcing bars to bend, thereby providing a tension force towards the center on both sides of the reinforcing cage. Furthermore, the deeper the groove, the greater the distance the grouting pipe descends, resulting in a greater tension force. This tension force is maintained until the concrete pouring is completed. After the two grouting pipes are pulled out, the restraining force on the connecting bars is released. The two connecting bars are then reset by the return spring, thus restoring the bent longitudinal steel bars. During the restoration, the entire steel cage vibrates. The vibration intensity varies according to the tension force, thus adapting to different depths of slotting. This causes the concrete inside the steel cage to shake, further solidifying the concrete. This prevents the concrete inside the steel cage from being insufficiently filled at the insertion point of the grouting pipes after they are pulled out, which would affect the stability of the continuous wall and improve its stability.

[0017] In this invention, by setting a damping pad, the friction between the surface of the grouting pipe and the inner wall of the limiting frame is increased when the worker moves the grouting pipe through the limiting frame, so that the grouting pipe moves more smoothly and the position of the grouting pipe is more stable, thereby further improving the stress stability of the connecting rib.

[0018] In this invention, a waterproof seal is installed to prevent water seepage into the steel cage when workers pour concrete into it, thus avoiding affecting the concrete pouring and ensuring the quality of the continuous wall. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a partial three-dimensional structural diagram of the present invention. Figure 1 ;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the locking tube and the reinforcing locking device in this invention;

[0023] Figure 5 This is a partial three-dimensional structural diagram of the reinforcement and locking device in this invention;

[0024] Figure 6 This is a schematic diagram of the deployed state of the reinforcing and locking device in this invention;

[0025] Figure 7 This is a cross-sectional view of the connecting frame and supporting steel bars in this invention;

[0026] Figure 8 This is a cross-sectional view of the supporting steel bars in this invention;

[0027] Figure 9 This is a partial three-dimensional structural diagram of the present invention. Figure 2 ;

[0028] Figure 10 This is a three-dimensional structural diagram of the grouting pipe and the connecting damping device in this invention;

[0029] Figure 11 This is a partial three-dimensional structural diagram of the shock absorption device in this invention;

[0030] Figure 12 for Figure 11 Enlarged schematic diagram of region A in the middle.

[0031] In the diagram: 1. Reinforcing cage; 2. Locking pipe; 3. Placement groove; 4. Horizontal reinforcing bar; 5. Reinforcing locking device; 51. Extension support assembly; 511. Connecting frame; 512. Through opening; 513. Supporting reinforcing bar; 514. Tension spring; 515. Moving part; 516. S-shaped elastic element; 517. Protrusion; 518. Slot; 519. Locking groove; 52. Trigger assembly; 521. Card plate; 522. Moving groove; 523. 524. Trigger; 525. Slope block; 526. Compression spring; 527. Activation block; 528. Opening; 6. Connecting damping device; 61. Connecting assembly; 611. Longitudinal reinforcement; 612. Connecting reinforcement; 62. Unlocking vibration assembly; 621. Fixing plate; 622. Reset spring; 623. Through groove; 624. Angled clamping plate; 625. Connecting plate; 7. Limiting frame; 8. Grouting pipe; 9. Damping pad; 10. Waterproof seal. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 12The present invention provides a technical solution comprising a reinforcing cage 1, wherein locking tubes 2 are symmetrically arranged on both sides of the reinforcing cage 1 and located in placement grooves 3, and a plurality of horizontal reinforcing bars 4 are equidistantly arranged inside the reinforcing cage 1, with both ends of the horizontal reinforcing bars 4 extending into adjacent placement grooves 3 respectively. Each horizontal reinforcing bar 4 has a reinforcing locking device 5 attached to the outer wall of the locking tube 2 at both ends. A connecting damping device 6 is provided at the center inside the reinforcing cage 1, and limiting frames 7 are symmetrically arranged on both sides of the connecting damping device 6 and located at the top of the reinforcing cage 1. A grouting pipe 8 is provided inside the limiting frame 7. The reinforcing locking device 5 includes an extension support assembly 51 and a trigger assembly 52. ​​The extension support assembly 51 is arranged on one end of the horizontal reinforcing bar 4, and the trigger assembly 52 is arranged inside the extension support assembly 51.

[0034] In this embodiment, as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the extension support assembly 51 includes a connecting frame 511. The side end of the connecting frame 511 is fixedly connected to the end of the horizontal reinforcing bar 4. The connecting frame 511 is hollow, and a through-hole 512 is provided at the end of the connecting frame 511 away from the horizontal reinforcing bar 4. A supporting reinforcing bar 513 is slidably disposed inside the connecting frame 511. The end of the supporting reinforcing bar 513 away from the through-hole 512 is movably connected to the inner side wall of the connecting frame 511 via a tension spring 514. The supporting reinforcing bar 513 is hollow and rests against... One end near the through opening 512 is open. The supporting steel bar 513 has a movable part 515 inside, and the side of the movable part 515 away from the through opening 512 is fixedly connected to the side wall inside the supporting steel bar 513. An S-shaped elastic part 516 is fixedly connected to the side of the movable part 515 near the through opening 512. A protrusion 517 is fixedly connected to the top of the S-shaped elastic part 516. The top of the protrusion 517 passes through the top of the supporting steel bar 513 through the slot 518 and abuts against the inner wall of the locking groove 519 opened at the top of the connecting frame 511.

[0035] The triggering component 52 includes a retaining plate 521, the top of which is fixedly connected to the bottom of an S-shaped elastic member 516. A moving groove 522 is provided on the retaining plate 521, the bottom of which is sloped. A trigger member 523 is slidably mounted on one end of the supporting steel bar 513 near the through opening 512. A ramp block 524 is fixedly connected to the side end of the trigger member 523 near the retaining plate 521. The ramp end of the ramp block 524 abuts against the sloped bottom of the moving groove 522. The side end of 24 is movably connected to the side wall inside the supporting steel bar 513 via a compression spring 525. The side end of the locking tube 2 is fixedly connected to an activation block 526. The upper and lower sides of the connecting frame 511 are provided with openings 527 through which the activation block 526 passes. The end of the trigger 523 away from the card plate 521 is arc-shaped and flush with the side end of the through opening 512 of the supporting steel bar 513. When the activation block 526 moves into the connecting frame 511 through the opening 527, the side end of the activation block 526 can abut against the arc-shaped surface of the trigger 523.

[0036] After the workers finish pouring the concrete and pull out the locking tube, the activation clip on the side of the locking tube will sequentially pass through the opening 527 of the connecting frame 511 on the side of each horizontal steel bar 4, and move upwards from the bottom opening 527 of the connecting frame 511 to the outside of the steel cage 1. Each time the activation clip passes through the opening 527 of a connecting frame 511, the arc-shaped surface of the trigger 523 creates a certain squeezing force on the trigger 523, thereby moving the trigger 523 towards the clamping plate 521, thus increasing the slope. The sloping end of the block 524 abuts against the inner bottom of the moving groove 522. During the movement, it drives the clamping plate 521 to move downward and simultaneously compresses the compression spring 525. The movable part 515 drives the supporting steel bar 513 to press against the inner side wall of the connecting frame 511 through the tension spring 514. During the downward movement of the clamping plate 521, it simultaneously drives the protrusion 517 to slide downward along the inner wall of the slot 518, thereby limiting the movement direction of the clamping plate 521. When the top of the protrusion 517 moves to the locking groove 519... When the lower part is reached, the S-shaped elastic element 516 and the movable element 515 release the restriction on the tension spring 514, and simultaneously drive the supporting steel bar 513 to pop out through the through hole 512, so that one end of the supporting steel bar 513 abuts against the inner wall of the slot 518 of the guide wall. This provides further support to the gap formed between the steel bar hole and the inner wall of the slot 518 during the removal of the locking tube 2, thereby avoiding the possibility of the inner wall of the slot 518 collapsing before the concrete has fully solidified, improving the retaining strength, and through sequential springing... The design effectively prevents concrete from spilling out when the grouting pipe 8 is pulled out, thus preventing concrete overflow. It also effectively blocks the concrete below the supporting steel bar 513 when the grouting pipe 8 is pulled out to a certain length. After the grouting pipe 8 and the activation block 526 move away from the connecting frame 511, the trigger 523 returns to the inside of the supporting steel bar 513 through the compression spring 525, thereby avoiding the problem of insufficient support force provided by the supporting steel bar 513 due to the hollow setting of the supporting steel bar 513, and further improving stability.

[0037] In this embodiment, as Figure 4 As shown, the side end of the connecting frame 511 near the locking tube 2 is set with an arc. The arc setting allows the side end of the connecting frame 511 to fit better against the side end of the locking tube 2, and when the locking tube 2 is pulled out, the locking tube 2 can always move along the side end of the connecting frame 511. While providing a limit, it also allows the locking tube 2 to trigger each extension support component 51, improving the stability of the device operation.

[0038] In this embodiment, as Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the connecting damping device 6 includes a connecting component 61 and an unlocking vibration component 62. The connecting component 61 is disposed inside the reinforcing cage 1, and the unlocking vibration component 62 is disposed on the connecting component 61. The connecting component 61 includes two longitudinal reinforcing bars 611. The two longitudinal reinforcing bars 611 are symmetrically arranged at the center of the reinforcing cage 1 and are respectively located at the side end of a limiting frame 7. The upper and lower ends of the longitudinal reinforcing bars 611 are respectively fixedly connected to the reinforcing cage 1. A connecting bar 612 is fixedly connected to the adjacent side of the two longitudinal reinforcing bars 611. The two connecting bars 612 are arranged in a figure-eight shape and the adjacent ends of the two connecting bars 612 are hinged. The hinged end of the two connecting bars 612 is located at the center of the entire reinforcing cage 1.

[0039] The unlocking vibration assembly 62 includes two fixing plates 621. The top of each fixing plate 621 is fixedly connected to the bottom of each connecting rib 612. The adjacent ends of the two fixing plates 621 are movably connected by a return spring 622. Each connecting rib 612 has a through groove 623 at its top. The through groove 623 is inclined toward the hinge of the connecting rib 612. An inclined clamping plate 624 is slidably provided in the through groove 623. The top of the inclined clamping plate 624 is fixedly connected to the side end of the grouting pipe 8 through a connecting plate 625.

[0040] When the workers adjust the position of the grouting pipe 8 according to the depth of the groove 518 using the limiting frame 7, by controlling the grouting pipe 8 to move closer to the bottom of the groove 518, the inclined clamping plate 624 on the connecting plate 625 moves downward in the through groove 623. This causes the two connecting bars 612 to move closer together with their ends far apart, forming a resisting force on the connecting bars 612. This causes the two longitudinal steel bars 611 to bend, thereby providing a tension force towards the center on both sides of the steel cage 1. At the same time, the deeper the groove 518, the greater the distance the grouting pipe 8 descends, resulting in a greater tension force. When the concrete is poured... After completion, when the two grouting pipes 8 are pulled out, the restraining force on the connecting bar 612 is unlocked. Through the reset spring 622, the two connecting bars 612 are reset, thereby restoring the bent longitudinal steel bar 611. During the restoration, the entire steel cage 1 vibrates. The vibration intensity varies according to the tension force, thus adapting to different depths of the slot 518. This causes the concrete inside the steel cage 1 to shake, further solidifying the concrete inside the steel cage 1. This prevents the concrete at the insertion position of the grouting pipe 8 from being insufficiently filled after the grouting pipe 8 is pulled out, which would affect the stability of the continuous wall formation and improve the stability.

[0041] In this embodiment, as Figure 2As shown, the inner wall of the limiting frame 7 is covered with a damping pad 9; by setting the damping pad 9, the friction between the surface of the grouting pipe 8 and the inner wall of the limiting frame 7 is increased when the worker moves the grouting pipe 8 through the limiting frame 7, so that the grouting pipe 8 moves more smoothly and the position of the grouting pipe 8 is more stable, further improving the stress stability of the connecting rib 612.

[0042] In this embodiment, as Figure 1 As shown, a waterproof seal 10 is laid on the outside of the locking pipe 2; the waterproof seal 10 prevents water from seeping into the steel cage 1 when workers pour concrete into it, thus affecting the concrete pouring and ensuring the quality of the continuous wall.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit support structure for wall-up and pile-down construction, characterized by: The utility model relates to a reinforced cage (1) both sides symmetry is equipped with lock pipe (2) and is located in the placement groove (3), a plurality of horizontal steels (4) are equipped with in the reinforced cage (1) equidistance, and the both ends of horizontal steel (4) respectively extend to the adjacent placement groove (3) in, and the both ends of each horizontal steel (4) are equipped with respectively the reinforcing locking device (5) that fits in the outer wall of lock pipe (2), reinforcing locking device (5) includes extension support subassembly (51) and trigger subassembly (52), extension support subassembly (51) sets up on the both ends of horizontal steel (4), trigger subassembly (52) sets up in extension support subassembly (51); The utility model relates to a reinforced cage (1) both sides symmetry is equipped with lock pipe (2) and is located in the placement groove (3), a plurality of horizontal steels (4) are equipped with in the reinforced cage (1) equidistance, and the both ends of horizontal steel (4) respectively extend to the adjacent placement groove (3) in, and the both ends of each horizontal steel (4) are equipped with respectively the reinforcing locking device (5) that fits in the outer wall of lock pipe (2), reinforcing locking device (5) includes extension support subassembly (51) and trigger subassembly (52), extension support subassembly (51) sets up on the both ends of horizontal steel (4), trigger subassembly (52) sets up in extension support subassembly (51); The extension support subassembly (51) includes the link frame (511), the side end fixed connection of link frame (511) is in the end of horizontal steel (4), link frame (511) is hollow and is equipped with the through -going mouth (512) in the end of link frame (511) away from horizontal steel (4), the support steel (513) of sliding of link frame (511) is equipped with, the end of support steel (513) away from through -going mouth (512) is with the side wall inside link frame (511) swing joint through the tensile spring (514), support steel (513) is hollow, the end of support steel (513) near through -going mouth (512) is open setting, the movable element (515) of support steel (513) is equipped with and movable element (515) side end away from through -going mouth (512) with the side wall in support steel (513) fixed connection, the side of movable element (515) near through -going mouth (512) is fixedly connected with S type elastic part (516), the top of S type elastic part (516) is fixedly connected with the lug (517), the top of lug (517) passes through the top of support steel (513) through the slot (518) and is located in the locking groove (519) inner wall that the top of link frame (511) is set up and touches, The trigger component (52) comprises a clamping plate (521), the top of the clamping plate (521) is fixedly connected with the bottom of the S-shaped elastic piece (516), a moving groove (522) is formed in the clamping plate (521), the inner bottom of the moving groove (522) is provided in a slope, a trigger piece (523) is slidably arranged in one end of the support steel bar (513) close to the through hole (512), a slope block (524) is fixedly connected with the side end of the clamping plate (521) close to the trigger piece (523), the slope end of the slope block (524) is provided in abutment with the slope of the inner bottom of the moving groove (522), the side end of the slope block (524) is movably connected with the side wall in the support steel bar (513) through a compression spring (525), the side end of the lock port pipe (2) is fixedly connected with an activation block (526), the upper and lower sides of the connection frame (511) are both provided with an opening (527) through which the activation block (526) passes, one end of the trigger piece (523) away from the clamping plate (521) is provided in an arc shape and flush with the side end of the through hole (512) of the support steel bar (513), when the activation block (526) moves into the connection frame (511) through the opening (527), the side end of the activation block (526) can abut on the arc surface of the trigger piece (523).

2. The foundation pit support structure for wall-on-pile construction of claim 1, wherein: The side end of the connection frame (511) close to the lock port pipe (2) is provided in an arc shape.

3. The foundation pit support structure for wall-on-pile construction of claim 1, wherein: The center of the steel reinforcement cage (1) is provided with a connection damping device (6), the two sides of the connection damping device (6) are symmetrically provided with limiting frames (7) and located at the top of the steel reinforcement cage (1), the limiting frames (7) are provided with grouting pipes (8) therein, the connection damping device (6) comprises a connection assembly (61) and an unlocking vibration assembly (62), the connection assembly (61) is arranged in the steel reinforcement cage (1), the unlocking vibration assembly (62) is arranged on the connection assembly (61), the connection assembly (61) comprises longitudinal steel bars (611), the longitudinal steel bars (611) are provided in two, the two longitudinal steel bars (611) are symmetrically arranged at the center of the steel reinforcement cage (1) and respectively located at the side end of one limiting frame (7), the upper and lower ends of the longitudinal steel bars (611) are respectively fixedly connected with the steel reinforcement cage (1), the side adjacent to the two longitudinal steel bars (611) is fixedly connected with connecting bars (612), the two connecting bars (612) are provided in a spread shape and the ends adjacent to the two connecting bars (612) are hinged, the ends of the two connecting bars (612) hinged to each other are located at the center of the steel reinforcement cage (1).

4. The foundation pit support structure for wall-on-pile construction of claim 3, characterized in that: The unlocking vibration assembly (62) comprises fixed plates (621), two fixed plates (621) are arranged, the top of each fixed plate (621) is fixedly connected with the bottom of each connecting rib (612), the adjacent end of the two fixed plates (621) is movably connected through a reset spring (622), the top of each connecting rib (612) is provided with a through groove (623), the through groove (623) is arranged obliquely towards the hinge of the connecting rib (612), and the oblique clamping plate (624) is slidably arranged in the through groove (623); the top of the oblique clamping plate (624) is fixedly connected with the side end of the grouting pipe (8) through a connecting plate (625).

5. The foundation pit support structure for wall-on-pile construction of claim 3, wherein: The inner wall of the limiting frame (7) is paved with damping pads (9).

6. The foundation pit support structure for wall-on-pile construction of claim 1, wherein: The outer side of the lock port pipe (2) is paved with a waterproof sealing strip (10).

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