A precast pile support structure for foundation pit

Abstract

The present application discloses a precast pile support structure for foundation pits, belonging to the field of foundation pit support. It includes pile columns, and an insertion column for improving the settlement resistance of the pile columns is provided at the bottom of the pile columns. A receiving groove for accommodating soil is formed in the insertion column, and an inclined surface is provided around the edge of the receiving groove of the insertion column. A support plate for preventing the pile columns from tilting is provided on the side wall of the pile columns, and an anchor rod is provided on the side wall of the pile column away from the support plate. A plug rod for connecting with the anchor rod is provided on the pile column, and a connecting rod for connecting with an adjacent pile column is provided on the pile column. A first sliding groove for slidingly cooperating with the connecting rod is formed in the pile column. A stability enhancing assembly for improving stability is provided on the pile column, and a first driving assembly for driving the support plate to move is provided on the pile column. The present application has the effects of improving the settlement resistance of the precast piles for foundation pits and preventing the precast piles from shifting.

Description

Technical Field

[0001] The present application relates to the field of foundation pit support, and particularly relates to a precast pile support structure for foundation pits. Background Art

[0002] A foundation pit is an earth pit excavated at the designed position of the foundation according to the base elevation and the foundation plane size. The foundation pit is a temporary project, and its function is to provide a space for the masonry operation of the foundation to be carried out at the designated position according to the design. In order to prevent the deformation of the soil mass on the slope of the foundation pit, construction workers will set precast piles around the foundation pit to support the soil mass of the foundation pit.

[0003] In the related art, the precast piles set in the foundation pit are inserted into the bottom of the foundation pit, and anchor bolts are used to limit the offset of the precast piles in the direction of the foundation pit. This setting method of the precast piles has poor shear resistance and poor settlement resistance. In a foundation pit with soft soil, the precast piles will have a certain offset. Summary of the Invention

[0004] In order to improve the settlement resistance of the precast piles in the foundation pit and prevent the precast piles from shifting, the present application provides a precast pile support structure for foundation pits.

[0005] A precast pile support structure for foundation pits provided by the present application adopts the following technical solutions:

[0006] A precast pile support structure for foundation pits includes a pile column. An insertion column for improving the settlement resistance of the pile column is arranged at the bottom of the pile column. A receiving groove for accommodating soil is formed in the insertion column. An inclined surface is arranged around the edge of the receiving groove of the insertion column. A support plate for preventing the pile column from tilting is arranged on the side wall of the pile column. An anchor rod is arranged on the side wall of the pile column away from the support plate. A plug rod for connecting with the anchor rod is arranged on the pile column. A connecting rod for connecting with an adjacent pile column is arranged on the pile column. A first sliding groove for slidingly cooperating with the connecting rod is formed in the pile column. A stability component for improving stability is arranged on the pile column. A first driving component for driving the support plate to move is arranged on the pile column.

[0007] By adopting the above technical solution, the operator first sets the anchor rod inside the side wall of the foundation pit slope. When the operator uses the hammering method to insert the pile column and the inserted column into the bottom surface of the foundation pit, part of the soil enters the receiving groove under the extrusion action. The soil entering the receiving groove can improve the stability of the inserted column and the pile column. After reaching the predetermined depth, the first driving component drives the support plate to move and abut against the bottom surface of the foundation pit, providing a certain lateral support force for the pile column, thereby improving the stability of the pile column. The insertion rod is inserted into the anchor rod and connected to the anchor rod. By providing the receiving groove, the support plate and the anchor rod, when the pile column and the inserted column extend into the soil layer at the bottom of the foundation pit, the soil entering the receiving groove can increase the contact surface between the pile column and the soil, improve the anti-settlement ability of the pile column, and the support plate and the anchor rod can improve the stability of the pile column and prevent the pile column from shifting.

[0008] Preferably, the stabilizing component includes an insertion rod which slidably penetrates through the inserted column. A second chute for slidably cooperating with the insertion rod is formed in the inserted column. Anti-slip lines are provided on the insertion rod, and a second driving component for driving the insertion rod to move is provided on the inserted column.

[0009] By adopting the above technical solution, after the pile column and the inserted column are inserted into the foundation pit, the second driving component drives the insertion rod to move. The insertion rod moves and penetrates out of the inserted column, and the insertion rod continues to penetrate deep into the bottom of the foundation pit, increasing the distance that the pile column and the inserted column extend into the soil and improving the stability of the pile column and the inserted column.

[0010] Preferably, the second driving component includes a sliding rod which slidably cooperates with the inner side wall of the receiving groove. The sliding rod penetrates into the pile column. A third chute for slidably cooperating with the sliding rod is formed in the pile column. The first chute and the receiving groove are both communicated with the third chute. The sliding rod can abut against the connecting rod. A first rack is provided on the side wall of the sliding rod close to the insertion rod, a second rack is fixedly connected to the insertion rod, and a first spur gear is provided in the inserted column. The first rack and the second rack are both meshed with the first spur gear.

[0011] By adopting the above technical solution, when the operator uses the hammering method to insert the pile column and the inserted column into the bottom surface of the foundation pit, part of the soil enters the receiving groove under the extrusion action, and the sliding rod moves. The movement of the sliding rod causes the first rack to move. The movement of the first rack causes the first spur gear to rotate. The rotation of the first spur gear causes the second rack to move. The movement of the second rack causes the insertion rod to move, and the insertion rod moves and penetrates deep into the foundation pit, thereby improving the stability of the pile column and the inserted column.

[0012] Preferably, a clamping block is slidably inserted through the sliding rod. A fourth sliding groove for slidably cooperating with the clamping block is formed in the sliding rod. A buffer spring is fixedly connected to the end of the clamping block located in the fourth sliding groove. The end of the buffer spring away from the clamping block is fixedly connected to the inner end wall of the fourth sliding groove. A slot for inserting and cooperating with the clamping block is formed in the pile column.

[0013] By adopting the above technical solution, when the sliding rod continuously moves under the push of the soil, during the movement of the sliding rod, the clamping block is always in contact with the inner side wall of the third sliding groove under the action of the buffer spring. When the clamping block moves to the position of the slot, the buffer spring pushes the clamping block to move, and the clamping block moves and inserts into the slot. At this time, the sliding block will not slide out of the third sliding groove.

[0014] Preferably, the first driving assembly includes a sliding seat and a first lead screw. The sliding seat is slidably arranged on the side wall of the pile column close to the support plate. The sliding seat is hinged to the support plate. The first lead screw is rotatably installed in the pile column. The first lead screw passes through the sliding seat. The first lead screw is in threaded cooperation with the sliding seat. A worm gear is fixedly sleeved at the end of the first lead screw. A worm is rotatably installed on the pile column. The worm is meshed with the worm gear.

[0015] By adopting the above technical solution, after the operator inserts the pile column into the soil layer, the operator rotates the worm. The rotation of the worm causes the worm gear to rotate. The rotation of the worm gear causes the first lead screw to rotate. The rotation of the first lead screw causes the sliding seat to move. The movement of the sliding seat causes the support plate to move and abut against the bottom surface of the foundation pit.

[0016] Preferably, an adjusting assembly for adjusting the support angle is arranged on the support plate. The adjusting assembly includes a sleeve and a second lead screw. A mounting seat is hinged on the sliding seat. The sleeve is hinged to the support plate. One end of the second lead screw is rotatably connected to the mounting seat. The other end of the second lead screw penetrates into the sleeve. The second lead screw is in threaded cooperation with the sleeve.

[0017] By adopting the above technical solution, when the support plate moves to the bottom of the foundation pit, in order to fit with the bottom surface of the foundation pit and improve the support strength of the support plate, the operator rotates the second lead screw. The rotation of the second lead screw causes the second lead screw to extend outside the sleeve, and the support angle of the support plate changes.

[0018] Preferably, a third driving assembly for driving the insertion rods to move is arranged in the pile column. The third driving assembly includes a sleeve and a wire reel. The sleeve is rotatably installed in the pile column. The wire reel is fixedly sleeved on the sleeve. A traction rope is wound around the wire reel. The end of the traction rope away from the wire reel is fixedly connected to the sliding seat. A plurality of the insertion rods are all arranged in the pile column. The insertion rods penetrate into the sleeve. The insertion rods are in threaded cooperation with the sleeve. A fixing assembly for connecting with the anchor rod is arranged on the insertion rods.

[0019] By adopting the above technical solution, during the movement of the sliding seat, the sliding seat pulls the traction rope to move. The movement of the traction rope causes the wire reel to rotate. The rotation of the wire reel causes the sleeve to rotate. The rotation of the sleeve causes the insertion rods to move and insert into the anchor rods that have been preset in the slope. When the insertion rods are inserted into the anchor rods, the fixing assembly connects the insertion rods and the anchor rods.

[0020] Preferably, the fixing assembly includes a fixing rod. The fixing rod penetrates into the insertion rod. A fifth sliding groove for slidably cooperating with the fixing rod is arranged in the insertion rod. A return spring is arranged on the end of the fixing rod located in the fifth sliding groove. The insertion rod penetrates out of the pile column and into the anchor rod. Card slots for plugging and cooperating with the fixing rod are arranged on both the sleeve and the anchor rod.

[0021] By adopting the above technical solution, when the sleeve rotates to cause the insertion rod to move, the fixing rod contracts into the fifth sliding groove and compresses the return spring at this time. When the insertion rod is inserted into the anchor rod and the fixing rod is aligned with the card slot, the return spring pushes the fixing rod to move so that both ends of the fixing rod are inserted into the card slots on the sleeve and the anchor rod respectively, connecting the anchor rod and the insertion rod together.

[0022] Preferably, a fourth driving assembly for driving the adjacent sleeves to rotate is arranged on the sleeve. The fourth driving assembly includes pulleys. Pulleys are fixedly sleeved on both the sleeve and the adjacent sleeve. A transmission belt is wound around the pulleys.

[0023] By adopting the above technical solution, during the movement of the sliding seat, the sliding seat pulls the traction rope to move. The movement of the traction rope causes the wire reel to rotate. The rotation of the wire reel causes the sleeve to rotate. The rotation of the sleeve causes the insertion rods to move and insert into the anchor rods that have been preset in the slope. At the same time, the rotation of the sleeve causes the pulley to rotate. The rotation of the pulley causes the other pulley to rotate through the transmission belt. At the same time, a plurality of insertion rods move simultaneously. The operator can set the corresponding number of insertion rods and anchor rods according to the engineering needs.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. By setting the receiving groove, the support plate, and the anchor rod, when the pile column and the inserted column penetrate into the soil layer at the bottom of the foundation pit, the soil entering the receiving groove can increase the contact surface between the pile column and the soil, improving the anti-settlement ability of the pile column. The support plate and the anchor rod can enhance the stability of the pile column and prevent the pile column from shifting.

[0026] 2. By setting the adjustment component, when the support plate moves to the bottom of the foundation pit, the operator can rotate the second lead screw. The rotation of the second lead screw causes the second lead screw to extend outside the sleeve, changing the support angle of the support plate, so that the support plate fits the bottom surface of the foundation pit, improving the support strength of the support plate.

[0027] 3. By setting the fourth driving component, during the movement of the sliding seat, a single sleeve can drive multiple sleeves to rotate simultaneously, enabling multiple insertion rods to be connected to multiple anchor rods at the same time, improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic structural diagram of a precast pile support structure for a foundation pit according to an embodiment of the present application.

[0029] Figure 2 FIG. is a schematic structural diagram of the third driving component according to an embodiment of the present application.

[0030] Figure 3 FIG. is a schematic structural diagram of the insertion rod according to an embodiment of the present application.

[0031] Figure 4 FIG. is a schematic structural diagram of the stability component according to an embodiment of the present application.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 1. Pile column; 11. Inserted column; 111. Receiving groove; 12. Support plate; 13. Anchor rod; 14. Insertion rod; 15. Connecting rod; 151. First chute; 2. Stability component; 21. Inserting rod; 211. Second chute; 22. Sliding rod; 221. Third chute; 23. First rack; 24. Second rack; 25. First spur gear; 26. Block; 261. Fourth chute; 262. Slot; 27. Buffer spring; 3. First driving component; 31. Sliding seat; 32. First lead screw; 321. Long slot; 33. Worm gear; 34. Worm; 4. Adjustment component; 41. Sleeve; 42. Second lead screw; 43. Mounting seat; 44. Pulley; 45. Transmission belt; 5. Third driving component; 51. Sleeve; 52. Reel; 53. Towing rope; 54. Fixed rod; 541. Fifth chute; 542. Card slot; 55. Return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0035] An embodiment of the present application discloses a retaining structure of precast piles for foundation pits. Refer to Figure 1 , a retaining structure of precast piles for foundation pits includes pile columns 1.

[0036] Refer to Figure 1 and Figure 2 , there are two pile columns 1, the pile columns 1 are vertically arranged, and the bottom ends of the pile columns 1 are fixedly connected with inserting columns 11. The cross-sections of the pile columns 1 and the inserting columns 11 are both rectangular, and inclined surfaces are arranged around the four sides of the inserting columns 11.

[0037] Refer to Figure 1 and Figure 2 , a first driving assembly 3 is arranged on the pile column 1, and the first driving assembly 3 includes a sliding seat 31 and a first lead screw 32. The sliding seat 31 is slidably arranged on the outer side wall of the pile column 1, a long groove 321 is formed in the pile column 1 along its height direction, the cross-section of the long groove 321 is rectangular, and the sliding seat 31 is in sliding fit with the inner side wall of the long groove 321.

[0038] Refer to Figure 1 and Figure 2 , the first lead screw 32 is vertically penetrated through the pile column 1, the first lead screw 32 penetrates into the long groove 321, the first lead screw 32 is rotatably connected with the inner bottom surface of the long groove 321, the first lead screw 32 passes through the sliding seat 31, and the first lead screw 32 is in threaded fit with the sliding seat 31.

[0039] Refer to Figure 1 and Figure 2 , the top end of the first lead screw 32 passes through the top surface of the pile column 1, and a worm gear 33 is fixedly sleeved on the end wall of the first lead screw 32 located at the top of the pile column 1. A worm 34 is penetrated through the top surface of the pile column 1, the worm 34 is rotatably connected with the pile column 1, and the worm 34 is meshed with the worm gear 33.

[0040] Refer to Figure 1 and Figure 2 , a support plate 12 is hinged at the bottom of the sliding seat 31, and an adjustment assembly 4 is arranged on the sliding seat 31. The adjustment assembly 4 includes a sleeve 41 and a second lead screw 42. The sleeve 41 is obliquely arranged on the top surface of the support plate 12, and the bottom end of the sleeve 41 is hinged with the top surface of the support plate 12. The second lead screw 42 is penetrated into the sleeve 41, and the second lead screw 42 is in threaded fit with the sleeve 41. An installation seat 43 is hinged at the top end of the sliding seat 31, and the end of the second lead screw 42 far away from the sleeve 41 penetrates into the installation seat 43, and the second lead screw 42 is rotatably connected with the installation seat 43.

[0041] Refer to Figure 1 and Figure 2 , anchor rods 13 are arranged on the side wall of the pile column 1 far away from the support plate 12, and two anchor rods 13 are arranged on a single pile column 1. Two inserting rods 14 are penetrated through a single pile column 1, and the inserting rods 14 are in sliding fit with the pile column 1.

[0042] Referring to Figure 1 and Figure 2 , a third driving component 5 is arranged in the pile column 1. The third driving component 5 includes a sleeve 51 and a wire reel 52. Two sleeves 51 are arranged in a single pile column 1. The two sleeves 51 are arranged at intervals along the height direction of the pile column 1. The sleeve 51 is rotatably installed in the pile column 1. The sleeve 51 is sleeved on the insertion rod 14. The sleeve 51 is in threaded cooperation with the insertion rod 14. A limiting block is fixedly connected to the end of the insertion rod 14 located outside the sleeve 51. A limiting groove is formed in the pile column 1. The limiting block is in sliding cooperation with the inner side wall of the limiting groove.

[0043] Referring to Figure 1 and Figure 2 , a single wire reel 52 is arranged in the pile column 1. The wire reel 52 is fixedly sleeved on the upper sleeve 51. A towing rope 53 is wound around the wire reel 52. The end of the towing rope 53 away from the wire reel 52 penetrates into the long groove 321. The end of the towing rope 53 located in the long groove 321 is fixedly connected to the sliding seat 31.

[0044] Referring to Figure 2 and Figure 3 , a fixing component is arranged on the insertion rod 14. The fixing component includes a fixing rod 54. Two fixing rods 54 are arranged on a single insertion rod 14. The two fixing rods 54 are symmetrically arranged along the axis of the insertion rod 14. A fifth sliding groove 541 is formed in the insertion rod 14 along its length direction. The cross section of the fifth sliding groove 541 is rectangular. The fixing rod 54 is arranged in the fifth sliding groove 541. The fixing rod 54 is in sliding cooperation with the inner side wall of the fifth sliding groove 541.

[0045] Referring to Figure 2 and Figure 3 , a plurality of return springs 55 are arranged on the side wall of the fixing rod 54 close to the adjacent fixing rod 54. The plurality of return springs 55 are uniformly arranged along the length direction of the fixing rod 54. Insertion blocks are arranged at both ends of the fixing rod 54. The insertion blocks penetrate out of the insertion rod 14. Card slots 542 are formed at the ends of the anchor rod 13 and the sleeve 51 close to each other. The insertion blocks on the insertion rod 14 are in insertion cooperation with the card slots 542.

[0046] Referring to Figure 2 , a fourth driving component is arranged on the sleeve 51. The fourth driving component includes a pulley 44. Two pulleys 44 are arranged on a single pile column 1. The two pulleys 44 are respectively fixedly sleeved on the two sleeves 51. A transmission belt 45 is wound around the two pulleys 44.

[0047] Referring to Figure 2 and Figure 4, a connecting rod 15 is horizontally inserted into the pile column 1, and the end of the connecting rod 15 away from the pile column 1 penetrates into the adjacent pile column 1. The pile column 1 is provided with a first sliding groove 151 along its width direction, and the connecting rod 15 is slidably matched with the inner side wall of the first sliding groove 151.

[0048] Refer to Figure 4 , a stabilizing component 2 is arranged on the inserting column 11, and the stabilizing component 2 includes an inserting rod 21. Four inserting rods 21 are vertically arranged in a single inserting column 11, and the four inserting rods 21 are respectively located in the middle of the four sides of the inserting column 11. The inserting column 11 is provided with a second sliding groove 211 along its height direction, and the inserting rod 21 is slidably matched with the inner side wall of the second sliding groove 211.

[0049] Refer to Figure 4 , a receiving groove 111 is arranged in the middle of the inserting column 11 along its height direction, and the cross section of the receiving groove 111 is rectangular. A second driving component is arranged on the inserting column 11, and the second driving component includes a sliding rod 22. The sliding rod 22 fits with the receiving groove 111, and the sliding rod 22 is slidably matched with the inner side wall of the receiving groove 111. The sliding rod 22 is vertically arranged, the top end of the sliding rod 22 penetrates into the pile column 1, the pile column 1 is provided with a third sliding groove 221 along its height direction, the cross section of the third sliding groove 221 is rectangular, the third sliding groove 221 is communicated with the receiving groove 111, and the sliding rod 22 is slidably matched with the inner side wall of the third sliding groove 221.

[0050] Refer to Figure 4 , a first rack 23 is fixedly connected to the end of the sliding rod 22 located in the receiving groove 111. Four first racks 23 are arranged on a single sliding rod 22, and the four first racks 23 are respectively located in the middle of each side of the sliding rod 22. A first straight gear 25 is rotatably installed in the inserting column 11, and the first straight gear 25 is rotatably connected to the inner side wall of the second sliding groove 211. Second racks 24 are fixedly connected to the top ends of the inserting rods 21, the first straight gear 25 corresponds to the second racks 24 one by one, and the first straight gear 25 meshes with the second racks 24. The first rack 23 penetrates into the second sliding groove 211, the first rack 23 meshes with the first straight gear 25, and the first rack 23 corresponds to the first straight gear 25 one by one.

[0051] Refer to Figure 4 , a clamping block 26 is horizontally inserted into the end of the sliding rod 22 located in the third sliding groove 221. Two clamping blocks 26 are arranged on a single sliding rod 22, and the two clamping blocks 26 are symmetrically arranged along the axis of the sliding rod 22. A fourth sliding groove 261 is arranged on the sliding rod 22, the cross section of the fourth sliding groove 261 is rectangular, and the clamping block 26 is slidably matched with the inner side wall of the fourth sliding groove 261. A buffer spring 27 is fixedly connected to the end of the clamping block 26 located in the fourth sliding groove 261, and the end of the buffer spring 27 away from the clamping block 26 is fixedly connected to the inner end wall of the fourth sliding groove 261.

[0052] Refer to Figure 4, a slot 262 is formed on the inner side wall of the third sliding groove 221. The cross-section of the slot 262 is rectangular. The clamping block 26 is slidably engaged with the inner side wall of the slot 262, and the clamping blocks 26 correspond to the slots 262 one by one. The third sliding groove 221 communicates with the first sliding groove 151. The end of the sliding rod 22 located in the first sliding groove 151 abuts against the bottom surface of the connecting rod 15.

[0053] The implementation principle of the precast pile support structure for foundation pits in the embodiment of the present application is as follows: First, the operator sets the anchor rod 13 inside the side wall of the foundation pit slope. When the operator uses the hammering method to insert the pile column 1 and the insertion column 11 into the bottom surface of the foundation pit, part of the soil enters the receiving groove 111 under the extrusion action. The soil entering the receiving groove 111 can improve the stability of the insertion column 11 and the pile column 1. After reaching the predetermined depth, the operator rotates the worm 34. The rotation of the worm 34 causes the worm wheel 33 to rotate. The rotation of the worm wheel 33 causes the first lead screw 32 to rotate. The rotation of the first lead screw 32 causes the sliding seat 31 to move. The movement of the sliding seat 31 causes the support plate 12 to move and abut against the bottom surface of the foundation pit.

[0054] During the movement of the sliding seat 31, the sliding seat 31 pulls the traction rope 53 to move. The movement of the traction rope 53 causes the wire reel 52 to rotate. The rotation of the wire reel 52 causes the sleeve 51 to rotate. The rotation of the sleeve 51 causes the insertion rod 14 to move and insert into the anchor rod 13 that has been preset in the slope. After the insertion rod 14 is inserted into the anchor rod 13, the fixing component connects the insertion rod 14 and the anchor rod 13.

[0055] During the movement of the sliding seat 31, the sliding seat 31 pulls the traction rope 53 to move. The movement of the traction rope 53 causes the wire reel 52 to rotate. The rotation of the wire reel 52 causes the sleeve 51 to rotate. The rotation of the sleeve 51 causes the insertion rod 14 to move and insert into the anchor rod 13 that has been preset in the slope. At the same time, the rotation of the sleeve 51 causes the pulley 44 to rotate. The rotation of the pulley 44 causes the other pulleys 44 to rotate through the transmission belt 45, and multiple insertion rods 14 move simultaneously. The operator rotates the second lead screw 42. The rotation of the second lead screw 42 causes the second lead screw 42 to extend outside the sleeve 41, and the support angle of the support plate 12 changes; by providing the receiving groove 111, the support plate 12 and the anchor rod 13, when the pile column 1 and the insertion column 11 extend into the soil layer at the bottom of the foundation pit, the soil entering the receiving groove 111 can increase the contact surface between the pile column 1 and the soil, improve the anti-settlement ability of the pile column 1, and the support plate 12 and the anchor rod 13 can improve the stability of the pile column 1 and prevent the pile column 1 from shifting.

[0056] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A precast pile retaining structure for foundation pits, characterized in that: It includes a pile column (1). An insertion column (11) for improving the anti-settlement ability of the pile column (1) is provided at the bottom of the pile column (1). A receiving groove (111) for accommodating soil is formed in the insertion column (11). The insertion column (11) is provided with an inclined surface around the edge of the receiving groove (111). A support plate (12) for preventing the pile column (1) from tilting is provided on the side wall of the pile column (1). An anchor rod (13) is provided on the side wall of the pile column (1) away from the support plate (12). A plugging rod (14) for connecting with the anchor rod (13) is provided on the pile column (1). A connecting rod (15) for connecting with an adjacent pile column (1) is provided on the pile column (1). A first sliding groove (151) for slidably cooperating with the connecting rod (15) is formed in the pile column (1). A stabilizing assembly (2) for improving stability is provided on the pile column (1). A first driving assembly (3) for driving the support plate (12) to move is provided on the pile column (1).

2. The precast pile retaining structure for foundation pit according to claim 1, characterized in that: The stabilizing assembly (2) includes a plugging rod (21). The plugging rod (21) slidably penetrates into the insertion column (11). A second sliding groove (211) for slidably cooperating with the plugging rod (21) is formed in the insertion column (11). The plugging rod (21) is provided with anti-slip lines. A second driving assembly for driving the plugging rod (21) to move is provided on the insertion column (11).

3. A foundation pit precast pile support structure according to claim 2, characterized in that: The second driving assembly includes a sliding rod (22). The sliding rod (22) slidably cooperates with the inner side wall of the receiving groove (111). The sliding rod (22) penetrates into the pile column (1). A third sliding groove (221) for slidably cooperating with the sliding rod (22) is formed in the pile column (1). The first sliding groove (151) and the receiving groove (111) are both communicated with the third sliding groove (221). The sliding rod (22) can abut against the connecting rod (15). A first rack (23) is provided on the side wall of the sliding rod (22) close to the plugging rod (21). A second rack (24) is fixedly connected to the plugging rod (21). A first spur gear (25) is provided in the insertion column (11). The first rack (23) and the second rack (24) are both meshed with the first spur gear (25).

4. A foundation pit precast pile support structure according to claim 3, characterized in that: A block (26) slidably penetrates through the sliding rod (22). A fourth sliding groove (261) for slidably cooperating with the block (26) is formed in the sliding rod (22). A buffer spring (27) is fixedly connected to the end of the block (26) located in the fourth sliding groove (261). The end of the buffer spring (27) away from the block (26) is fixedly connected to the inner end wall of the fourth sliding groove (261). A slot (262) for plugging and cooperating with the block (26) is formed in the pile column (1).

5. The precast pile retaining structure for foundation pit according to claim 1, characterized in that: The first driving component (3) includes a sliding seat (31) and a first lead screw (32). The sliding seat (31) is slidably arranged on the side wall of the pile column (1) close to the support plate (12). The sliding seat (31) is hinged to the support plate (12). The first lead screw (32) is rotatably installed in the pile column (1). The first lead screw (32) passes through the sliding seat (31) and is in threaded cooperation with the sliding seat (31). A worm gear (33) is fixedly sleeved at the end of the first lead screw (32). A worm (34) is rotatably installed on the pile column (1), and the worm (34) meshes with the worm gear (33).

6. A foundation pit precast pile support structure according to claim 5, characterized in that: An adjusting component (4) for adjusting the support angle is arranged on the support plate (12). The adjusting component (4) includes a sleeve (41) and a second lead screw (42). A mounting seat (43) is hinged on the sliding seat (31). The sleeve (41) is hinged to the support plate (12). One end of the second lead screw (42) is rotatably connected to the mounting seat (43), and the other end of the second lead screw (42) penetrates into the sleeve (41) and is in threaded cooperation with the sleeve (41).

7. A foundation pit precast pile support structure according to claim 5, characterized in that: A third driving component (5) for driving the insertion rod (14) to move is arranged in the pile column (1). The third driving component (5) includes a sleeve (51) and a wire reel (52). The sleeve (51) is rotatably installed in the pile column (1). The wire reel (52) is fixedly sleeved on the sleeve (51). A traction rope (53) is wound around the wire reel (52). The end of the traction rope (53) away from the wire reel (52) is fixedly connected to the sliding seat (31). A plurality of insertion rods (14) are all arranged in the pile column (1). The insertion rods (14) penetrate into the sleeve (51) and are in threaded cooperation with the sleeve (51). A fixing component for connecting with the anchor rod (13) is arranged on the insertion rod (14).

8. A foundation pit precast pile support structure according to claim 7, characterized in that: The fixing component includes a fixing rod (54). The fixing rod (54) penetrates into the insertion rod (14). A fifth chute (541) for slidably cooperating with the fixing rod (54) is arranged in the insertion rod (14). A return spring (55) is arranged at the end of the fixing rod (54) located in the fifth chute (541). The insertion rod (14) penetrates out of the pile column (1) and into the anchor rod (13). Card slots (542) for inserting and cooperating with the fixing rod (54) are respectively arranged on the sleeve (51) and the anchor rod (13).

9. A foundation pit precast pile support structure according to claim 7, characterized in that: A fourth driving component for driving the adjacent sleeve (51) to rotate is arranged on the sleeve (51). The fourth driving component includes a pulley (44). Pulleys (44) are fixedly sleeved on the sleeve (51) and the adjacent sleeve (51), and a transmission belt (45) is wound around the pulleys (44).

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