A green support structure for deep foundation pit

Abstract

The present invention discloses a green support structure for a deep foundation pit, and relates to the technical field of foundation pit support, including retaining piles attached to the inner side wall of the foundation pit and pulling piles buried in the soil foundation outside the foundation pit, the upper end of the retaining pile is connected with the upper end of the pulling pile by a pulling rod, and also includes: a push plate, which is arranged on the side wall of the pulling pile close to one side of the retaining pile, and its lower end is hinged with the pulling pile; a collar, which is arranged in the pulling pile for lifting and lowering, and its outer side is movably connected with the inner side of the push plate through a connecting rod; a driving assembly, which is arranged in the pulling pile and is used to drive the collar to lift. The present invention drives the collar to descend in the pulling pile through the driving assembly, and then drives the connecting rod to move, and the connecting rod pushes the upper end of the push plate to move toward the outside of the pulling pile, that is, the upper end of the push plate is extended to the outside of the pulling pile by a certain angle, because the push plate can abut against the inner wall of the soil foundation where the pulling pile is buried and correct the displacement of the pulling pile in the opposite direction of the position of the foundation pit, thereby also restoring the retaining pile to a vertical state, ensuring the construction safety in the foundation pit.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a green support structure for a deep foundation pit. Background Art

[0002] The SMW method uses a multi-axis drilling and mixing machine to drill to a certain depth on site, while spraying cement-based strengthening agents at the drill bit to repeatedly mix and stir with the foundation soil. Overlapping construction is adopted between each construction unit, and then H-shaped steel or steel plates are inserted as stress reinforcement materials before the cement-soil mixture hardens. When the cement hardens, a continuous, complete, and seamless underground wall with a certain strength and rigidity is formed. It is mainly used for the support of deep foundation pits.

[0003] Patent document CN102644286A disclosed a deep foundation pit support structure on the announcement date of August 22, 2012, and its technical solution includes: soil nail retaining piles attached to the side wall of the foundation pit, a water-stopping support row of piles with one end embedded in the soil below the foundation pit is arranged on the outside of the soil nail retaining piles, a horizontal anti-lateral crown beam is arranged in the middle of the water-stopping support row of piles, and an anti-lateral reinforcement row of piles is arranged below the anti-lateral crown beam. Its beneficial effect is that by attaching the soil nail retaining piles to the side wall of the foundation pit for retaining soil, the water-stopping support row of piles can prevent water seepage of the pile body while supporting the soil nail retaining piles, and the anti-lateral reinforcement row of piles is arranged on the outside of the water-stopping support row of piles to further support the soil nail retaining piles and the water-stopping support row of piles, which can effectively ensure the strength of the support structure and provide better quality and safer protection for the deep foundation pit.

[0004] As in the prior art of the above-mentioned patent, SMW method piles are usually used as inner supports for foundation pits. In order to enhance the stability of the supports, outer supports are usually provided and connected by tie rods and other connecting structures. However, during a long period of use, the inner supports may tilt due to stress, which may also cause the outer supports to shift position. Therefore, a green support structure for deep foundation pits is urgently needed to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a green supporting structure for a deep foundation pit to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A green supporting structure for a deep foundation pit comprises retaining piles attached to the inner wall of the foundation pit and pulling piles buried in the soil foundation outside the foundation pit, wherein the upper ends of the retaining piles and the pulling piles are connected via pulling rods, and further comprises: a push plate, which is arranged on the side wall of the pulling pile close to one side of the retaining pile, and whose lower end is hinged to the pulling pile; a collar, which is arranged in the pulling pile for lifting and lowering, and whose outer side is movably connected to the inner side of the push plate via a connecting rod; and a driving assembly, which is arranged in the pulling pile and is used to drive the collar to lift and lower so as to adjust the expansion angle of the upper end of the push plate toward the outer side of the pulling pile.

[0008] Preferably, the driving assembly includes a first screw rotatably arranged inside the pile, the first screw externally threadedly is sleeved with a first threaded sleeve, the sleeve is rotatably sleeved on the outside of the first threaded sleeve, and the first threaded sleeve is provided with a limiting assembly for limiting its own rotation relative to the sleeve, and the limiting assembly cancels the limiting effect when the sleeve descends to the lowest position of the lifting stroke.

[0009] Preferably, the limiting assembly includes a first convex ring and a second convex ring which are coaxially fixed on the first threaded sleeve, the first convex ring and the second convex ring are respectively arranged on the upper and lower sides of the sleeve, a limiting ring is arranged on the lower side of the second convex ring which is elastically rotatably connected to the first threaded sleeve, the second convex ring and the limiting ring are both provided with grooves matching the connecting rod, and the upper ends of the second convex ring and the limiting ring are provided with chamfers with smooth transitions.

[0010] Preferably, an anchor is movably provided on the pull pile, one end of which can extend through the pull pile away from the side wall of the retaining pile, and a linkage component for driving the anchor to move is provided in the pull pile, and the linkage component is driven by the driving component after the ring descends to the lowest position of the lifting stroke.

[0011] Preferably, the side wall of the pulling pile is provided with a through hole for the anchor to pass through, the inner top surface and the inner bottom surface of the through hole are provided with elastic clamping blocks, and the anchor is arranged between the two elastic clamping blocks.

[0012] Preferably, the linkage assembly includes a swivel column rotatably arranged in the pulling pile, a turntable is coaxially fixedly sleeved on the swivel column, a sliding column is slidably connected to the turntable via a gradual sliding groove, and the sliding column is connected to one end of the anchor piece that remains in the pulling pile.

[0013] Preferably, a linkage shaft is rotatably arranged inside the pulling pile, the lower end of the first threaded sleeve is coaxially fixedly connected to a first gear, the upper end of the linkage shaft is coaxially fixedly connected to a second gear that meshes with the first gear, the lower end of the linkage shaft is coaxially fixedly connected to a third gear, and the upper end of the rotary column is coaxially fixedly connected to a fourth gear that meshes with the third gear.

[0014] Preferably, the slide column is hingedly connected to the anchor, the slide column can be raised and lowered relative to the turntable, and the lower end of the linkage shaft is provided with a pressing component for pressing down the upper end of the slide column when the anchor extends to the maximum length of the pile pulling.

[0015] Preferably, a sliding sleeve is slidably arranged in the gradual sliding groove, the sliding sleeve is axially movably sleeved on the sliding column, and an elastic member is connected between the sliding sleeve and one end of the sliding column in the same direction.

[0016] Preferably, the pressing assembly includes a second screw rod coaxially connected to the lower end of the linkage shaft, the lower end of the second screw rod is threadedly sleeved with a second threaded sleeve, the lower end of the second threaded sleeve is fixedly connected with a pressure block that is movably arranged in the pull pile, and when the anchor is close to extending to the maximum length of the pull pile, the upper end of the sliding column is corresponding to the lower side of the pressure block.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] When the pulling pile of the deep foundation pit green support structure is affected by the inclination of the retaining pile and deviates toward the foundation pit direction, the driving assembly drives the collar to descend in the pulling pile, thereby driving the connecting rod to move. The connecting rod pushes the upper end of the push plate to move toward the outside of the pulling pile, that is, the upper end of the push plate is extended to the outside of the pulling pile at a certain angle. Since the push plate can abut against the inner wall of the soil foundation where the pulling pile is buried and correct the deviation of the pulling pile in the opposite direction of the foundation pit, the retaining pile is restored to a vertical state, thereby ensuring the construction safety in the foundation pit.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of a front cross-sectional structure of a push plate in a folded state provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a front cross-sectional structure of a push plate in an expanded state provided by an embodiment of the present invention;

[0024] Figure 3 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 The embodiment of the present invention provides Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 5 A schematic diagram of an overall three-dimensional structure provided by an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the internal three-dimensional structure of a pull pile provided by an embodiment of the present invention;

[0028] Figure 7 The embodiment of the present invention provides Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0029] Figure 8 The embodiment of the present invention provides Figure 6 Schematic diagram of the enlarged structure at D in the middle.

[0030] Description of reference numerals:

[0031] 1. Retaining pile; 2. Pull pile; 3. Pull rod; 4. Push plate; 5. Ring; 6. Connecting rod; 7. First screw; 8. First threaded sleeve; 9. First convex ring; 10. Second convex ring; 11. Limiting ring; 12. Slot; 13. Anchor; 14. Through port; 15. Elastic clamp; 16. Rotary column; 17. Turntable; 18. Gradient slide; 19. Sliding column; 20. Linkage shaft; 21. First gear; 22. Second gear; 23. Third gear; 24. Fourth gear; 25. Sliding sleeve; 26. Elastic member; 27. Second screw; 28. Second threaded sleeve; 29. ​​Pressing block. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] See also Figure 1-8A green supporting structure for a deep foundation pit provided by an embodiment of the present invention comprises a retaining pile 1 attached to the inner wall of the foundation pit and a pulling pile 2 buried in the soil foundation outside the foundation pit, wherein the upper end of the retaining pile 1 is connected to the upper end of the pulling pile 2 by a pulling rod 3, and further comprises: a pushing plate 4, which is arranged on the side wall of the pulling pile 2 close to the retaining pile 1, and the lower end of which is hinged to the pulling pile 2; a collar 5, which is movably arranged in the pulling pile 2 for lifting, and the outer side of which is movably connected to the inner side of the pushing plate 4 by a connecting rod 6; a driving assembly, which is arranged in the pulling pile 2 for driving the collar 5 to lift and lower so as to adjust the expansion angle of the upper end of the pushing plate 4 toward the outer side of the pulling pile 2.

[0034] Specifically, the retaining pile 1 is maintained in a vertical position during actual use; the pulling pile 2 is in a vertical position or the upper end is inclined at a certain angle away from the foundation pit during actual use; the pulling pile 2 may preferably be a rectangular square pile; the retaining pile 1 is preferably an SMW method pile, which forms a support for the side wall of the foundation pit and serves as a water-stop curtain. The upper end of the retaining pile 1 is connected by a connecting beam; during the construction process, before the retaining pile 1 is finalized, a steel section is inserted to help stabilize it. After finalization, the steel section can be pulled out for reuse, thereby achieving the purpose of saving materials and improving economic benefits; the pull rod 3 is preferably U-shaped, and a bolt head is anchored at the upper end of the connecting beam at the upper end of the retaining pile 1, the bent part of the pull rod 3 is sleeved on the outside of the bolt head, and the upper end is tightly crimped with a fastener screwed to the bolt head, and the two ends of the pull rod 3 extend to the upper end of the pulling pile 2, and the upper end of the pulling pile 2 is provided with a hole seat to connect the two ends of the pull rod 3 and fasten it by another set of fasteners. When the push plate 4 is retracted close to the pulling pile 2, it is flush with the corresponding side wall of the pulling pile 2, and the lower end of the push plate 4 is arranged close to the lower end of the pulling pile 2; in actual use, the side wall of the pulling pile 2 on which the push plate 4 is arranged is arranged opposite to the retaining pile 1; the axial direction of the collar 5 is parallel to the length direction of the pulling pile 2; the two ends of the connecting rod 6 are hinged to the collar 5 and the push plate 4 respectively; the height of one end of the connecting rod 6 connected to the collar 5 is higher than the other end, and then when the collar 5 descends, the horizontal distance between the two ends of the connecting rod 6 is enlarged, and the upper end of the push plate 4 is extended outward from the pulling pile 2, and when the collar 5 rises, the horizontal distance between the two ends of the connecting rod 6 is reduced, and the upper end of the push plate 4 is retracted into the pulling pile 2. In actual use of the present technical solution, when the pulling pile 2 is affected by the inclination of the retaining pile 1 and deviates toward the foundation pit, the driving assembly drives the collar 5 to descend in the pulling pile 2, thereby driving the connecting rod 6 to move. The connecting rod 6 pushes the upper end of the push plate 4 to move toward the outside of the pulling pile 2, that is, the upper end of the push plate 4 is extended to the outside of the pulling pile 2 by a certain angle. Since the push plate 4 can abut against the inner wall of the soil foundation where the pulling pile 2 is buried and correct the deviation of the pulling pile 2 in the opposite direction of the foundation pit, the retaining pile 1 is restored to a vertical state, thereby ensuring the construction safety in the foundation pit.

[0035] Compared with the prior art, a deep foundation pit green support structure proposed in an embodiment of the present invention drives the ring 5 to descend in the pile 2 through the driving assembly when the pile 2 is affected by the inclination of the retaining pile 1 and deviates toward the foundation pit direction, thereby driving the connecting rod 6 to move. The connecting rod 6 pushes the upper end of the push plate 4 to move toward the outside of the pile 2, that is, the upper end of the push plate 4 is extended to the outside of the pile 2 at a certain angle. Since the push plate 4 can abut against the inner wall of the soil foundation where the pile 2 is buried and correct the deviation of the pile 2 in the opposite direction of the foundation pit, the retaining pile 1 is also restored to a vertical state, thereby ensuring the construction safety in the foundation pit.

[0036] As the preferred technical scheme of this embodiment, the driving assembly includes a first screw rod 7 rotatably arranged in the pile pulling 2, the first screw rod 7 is externally threadedly sleeved with a first threaded sleeve 8, the collar 5 is rotatably sleeved on the outside of the first threaded sleeve 8, and the first threaded sleeve 8 is provided with a limit assembly for limiting its own rotation relative to the collar 5. The limit assembly cancels the limiting effect when the collar 5 descends to the lowest position of the lifting stroke. Specifically, the axial direction of the first screw rod 7 is parallel to the length direction of the pile pulling 2; the upper end of the first screw rod 7 rotates to penetrate the pile pulling 2 and is connected to an operating panel; when the limit assembly keeps limiting the relative rotation of the first threaded sleeve 8 and the collar 5, when the first screw rod 7 rotates, the first threaded sleeve 8 and the first screw 7 undergo a threaded feeding effect and move axially, thereby driving the collar 5 to move up and down; when the limit assembly cancels limiting the relative rotation of the first threaded sleeve 8 and the collar 5, the first threaded sleeve 8 can rotate synchronously with the first screw 7.

[0037] As a preferred technical solution of this embodiment, the limiting assembly includes a first convex ring 9 and a second convex ring 10 which are coaxially fixedly sleeved on the first threaded sleeve 8. The first convex ring 9 and the second convex ring 10 are respectively arranged on the upper and lower sides of the collar 5. A limiting ring 11 which is elastically rotatably connected to the first threaded sleeve 8 is arranged on the lower side of the second convex ring 10. A groove 12 matching the connecting rod 6 is arranged on the second convex ring 10 and the limiting ring 11. The upper ends of the second convex ring 10 and the limiting ring 11 are provided with a smoothly transitioned chamfer. Specifically, the first convex ring 9 and the second convex ring 10 limit the upper and lower sides of the collar 5 so that the collar 5 Synchronous with the axial movement of the first threaded sleeve 8; the limiting ring 11 is sleeved on the outside of the first threaded sleeve 8, and the inner ring is coaxially connected to the first threaded sleeve 8 through a coil spring, thereby elastically limiting the rotation of the limiting ring 11 relative to the first threaded sleeve 8; under the elastic rotation of the limiting ring 11, the groove 12 on the second convex ring 10 and the groove 12 on the limiting ring 11 maintain a tendency of misalignment and separation; and in actual use, when the push plate 4 is close to the pulling pile 2, the second convex ring 10 and the groove 12 on the limiting ring 11 overlap up and down, and at this time the angle of the connecting rod 6 can just be embedded in the groove 12, thereby limiting The rotation of the collar 5 relative to the second convex ring 10, that is, the rotation of the collar 5 relative to the first threaded sleeve 8 is limited, and the rotation of the limit ring 11 relative to the second convex ring 10 is also limited; when the collar 5 is lowered to the lowest position of the lifting stroke, the angle change caused by the connecting rod 6 pushing the push plate 4 can just move out of the second convex ring 10 and the groove 12 on the limit ring 11, thereby canceling the relative rotation between the limiting collar 5 and the first threaded sleeve 8, and canceling the rotation of the limit ring 11 relative to the second convex ring 10, that is, the limit ring 11 elastically rotates so that the groove 12 on it is aligned with the groove 12 on the second convex ring 10 The slot 12 is misaligned; the gently transitioning chamfers set at the upper ends of the second convex ring 10 and the limiting ring 11 are just consistent with the angle at which the connecting rod 6 tilts out of the slot 12 when the collar 5 drops to the lowest position, and are parallel to the lower side of the connecting rod 6. Therefore, after the limiting ring 11 elastically rotates through the above process, the connecting rod 6 is restricted to the outside of the second convex ring 10 and the limiting ring 11 and cannot move back, that is, when the first screw rod 7 is subsequently reversed, the first threaded sleeve 8 still reverses with the first screw rod 7, and no thread feeding effect occurs, that is, the collar 5 will not be driven to rise, and the push plate 4 will not be pulled to close.

[0038] In another embodiment of the present invention, an anchor 13 is movably provided on the pull pile 2, one end of the anchor 13 can penetrate and extend out of the side wall of the pull pile 2 away from the retaining pile 1, and a linkage assembly for driving the anchor 13 to move is provided in the pull pile 2, and the linkage assembly is driven by the driving assembly after the collar 5 is lowered to the lowest position of the lifting stroke. Specifically, after the upper end of the pull pile 2 deviates toward the foundation pit, the pull rod 3 is subjected to the pulling force in the direction of the foundation pit, and there is an upward component force, so that the pull pile 2 has an upward floating deviation, thereby affecting the positioning function of the pull pile 2. The anchor 13 can extend from the side wall of the pull pile 2 to be inserted and anchored deep in the soil foundation, thereby stabilizing the pull pile 2 and preventing the pull pile 2 from floating deviation; the linkage assembly is driven by the driving assembly after the collar 5 is lowered to the lowest position of the lifting stroke, so that the extension of the anchor 13 occurs after the deviation of the pull pile 2 is corrected.

[0039] As a preferred technical solution of this embodiment, a through hole 14 is provided on the side wall of the pulling pile 2 for the anchor 13 to pass through, and elastic clamping blocks 15 are provided on the inner top surface and the inner bottom surface of the through hole 14, and the anchor 13 is arranged between the two elastic clamping blocks 15. Specifically, the through hole 14 is opened horizontally; an arc-shaped convex surface is provided on the side close to the two elastic clamping blocks 15, and the distance between the closest points matches the thickness of the anchor 13; the anchor 13 can slide out of the through hole 14 from between the two elastic clamping blocks 15; the anchor 13 can also swing up and down at both ends of the axis with the part passing through the through hole 14 as the axis, and during this swinging process, the two elastic clamping blocks 15 can undergo elastic deformation to achieve adaptation.

[0040] As a preferred technical solution of this embodiment, the linkage assembly includes a rotating column 16 rotatably arranged in the pile 2, a turntable 17 is coaxially fixedly sleeved on the rotating column 16, and a sliding column 19 is slidably connected to the turntable 17 through a gradual sliding groove 18. The sliding column 19 is connected to one end of the anchor 13 that is kept in the pile 2. Specifically, the axial direction of the rotating column 16 is colinear or parallel to the axial direction of the first screw 7; there are preferably two turntables 17, which are symmetrically arranged on the upper and lower sides of the anchor 13; one end of the gradual sliding groove 18 is arranged close to the center of the turntable 17, and the other end is close to the side of the turntable 17 The sliding column 19 is provided with an edge, and the distance between the two ends relative to the axis of the turntable 17 changes smoothly; the sliding column 19 moves radially and with the anchor 13; the rotating column 16 drives the turntable 17 to rotate, so that the sliding column 19 moves relatively in the gradual sliding groove 18, and when the sliding column 19 moves from one end close to the axis of the turntable 17 to the other end in the gradual sliding groove 18, the sliding column 19 pushes the anchor 13 to extend outward from the pulling pile 2, and when the sliding column 19 moves from one end away from the axis of the turntable 17 to the other end in the gradual sliding groove 18, the sliding column 19 pulls the anchor 13 to retract into the pulling pile 2.

[0041] As the preferred technical solution of this embodiment, a linkage shaft 20 is provided for rotation in the pile pull 2, a first gear 21 is coaxially fixedly connected to the lower end of the first threaded sleeve 8, a second gear 22 meshing with the first gear 21 is coaxially fixedly connected to the upper end of the linkage shaft 20, a third gear 23 is coaxially fixedly connected to the lower end of the linkage shaft 20, and a fourth gear 24 meshing with the third gear 23 is coaxially fixedly connected to the upper end of the rotating column 16. Specifically, the axial direction of the linkage shaft 20 is parallel to the axial direction of the first screw 7; the axial length of the first gear 21 is less than the axial length of the second gear 22, and when the first gear 21 moves axially with the first threaded sleeve 8, the first gear 21 is always meshed with the second gear 22. When the collar 5 descends to the lowest position, the rotation of the first screw 7 drives the first threaded sleeve 8 to rotate, the first threaded sleeve 8 drives the first gear 21 to rotate, the first gear 21 drives the second gear 22, the second gear 22 drives the third gear 23 to rotate through the linkage shaft 20, the third gear 23 drives the fourth gear 24, and the fourth gear 24 drives the rotating column 16 to rotate. The first screw rod 7 drives the ring 5 to rotate when it descends and drives the rotating column 16 to rotate so that the anchor 13 extends out of the side wall of the pulling pile 2, and its rotation direction remains unchanged. That is, after the push plate 4 is unfolded to correct the position of the pulling pile 2, the anchor 13 is extended out of the pulling pile 2 to be anchored in the soil foundation.

[0042] In another embodiment of the present invention, the slide column 19 is hingedly connected to the anchor 13, and the slide column 19 can be raised and lowered relative to the turntable 17. The lower end of the linkage shaft 20 is provided with a pressing component for pressing down the upper end of the slide column 19 when the anchor 13 is extended to the maximum length of the pile 2. Specifically, the lifting and lowering movement of the slide column 19 allows the anchor 13 to swing up and down; the setting of the pressing component presses down the slide column 19 when the anchor 13 is extended to the maximum length of the pile 2, so that the part of the anchor 13 extending out of the pile 2 swings upward, thereby applying downward force to the pile 2 through the reaction force, thereby strengthening the possibility of preventing the pile 2 from floating upward.

[0043] As the preferred technical solution of this embodiment, a sliding sleeve 25 is slidably arranged in the gradual sliding groove 18, and the sliding sleeve 25 is axially movably sleeved on the sliding column 19, and an elastic member 26 is connected between the sliding sleeve 25 and one end of the sliding column 19 in the same direction. Specifically, flanges are arranged at both ends of the sliding sleeve 25 to just fit in the upper and lower sides of the turntable 17, so that the sliding sleeve 25 can only move radially along the gradual sliding groove 18; the elastic member 26 can preferably be a spring, which is sleeved on the end of the sliding column 19, and the two ends are respectively connected to the sliding column 19 and the sliding sleeve 25, so that the height of the sliding column 19 relative to the turntable 17 is elastically limited, and under this limitation, the anchor 13 can keep moving in the direction perpendicular to the side wall of the pulling pile 2; when the sliding column 19 can be elastically raised and lowered, the end of the anchor 13 extending out of the pulling pile 2 can swing up and down, and then when encountering some hard stones in the soil foundation, the anchor 13 can passively avoid it to continue to be inserted.

[0044] As the preferred technical scheme of this embodiment, the pressing assembly includes a second screw rod 27 coaxially connected to the lower end of the linkage shaft 20, the lower end of the second screw rod 27 is threadedly sleeved with a second threaded sleeve 28, and the lower end of the second threaded sleeve 28 is fixedly connected with a pressure block 29 which is movably arranged in the pile 2 for lifting and lowering. When the anchor 13 approaches the maximum length of the pile 2, the upper end of the sliding column 19 is arranged corresponding to the lower side of the pressure block 29. Specifically, when the linkage shaft 20 is driven and the anchor 13 is extended outward through transmission, it also drives the second screw rod 27 to rotate, so that the second threaded sleeve 28 has a threaded feeding effect with it, and then the second threaded sleeve 28 drives the pressure block 29 to descend. When the anchor 13 approaches the maximum length of the pile 2, the upper end of the sliding column 19 corresponds to the lower side of the pressure block 29, and then the pressure block 29 presses down the sliding column 19, thereby causing the end of the anchor 13 extending out of the pile 2 to gradually tilt upward, thereby generating a reaction force with the soil foundation, applying downward force to the pile 2, thereby strengthening the possibility of preventing the pile 2 from floating upward.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A green support structure for a deep foundation pit, comprising a retaining pile (1) attached to the inner wall of the foundation pit and a pull pile (2) buried in the soil foundation outside the foundation pit, wherein the upper end of the retaining pile (1) is connected to the upper end of the pull pile (2) through a pull rod (3), characterized in that: Also includes: A push plate (4), which is arranged on the side wall of the pull pile (2) close to the retaining pile (1), and the lower end of which is hinged to the pull pile (2); A sleeve ring (5) is arranged in the pull pile (2) for lifting and lowering, and its outer side is movably connected to the inner side of the push plate (4) through a connecting rod (6); A driving assembly, which is arranged in the pulling pile (2) and is used to drive the collar (5) to rise and fall so as to adjust the angle at which the upper end of the push plate (4) is deployed toward the outside of the pulling pile (2); The driving assembly comprises a first screw (7) rotatably arranged in the pulling pile (2), the first screw (7) being externally threadedly sleeved with a first threaded sleeve (8), the collar (5) being rotatably sleeved on the outside of the first threaded sleeve (8), the first threaded sleeve (8) being provided with a limiting assembly for limiting its own rotation relative to the collar (5), the limiting assembly canceling the limiting effect when the collar (5) descends to the lowest position of the lifting stroke; The limiting assembly comprises a first convex ring (9) and a second convex ring (10) which are coaxially fixedly sleeved on a first threaded sleeve (8); the first convex ring (9) and the second convex ring (10) are respectively arranged on the upper and lower sides of the sleeve ring (5); a limiting ring (11) which is elastically rotatably connected to the first threaded sleeve (8) is arranged on the lower side of the second convex ring (10); a groove (12) matching the connecting rod (6) is arranged on the second convex ring (10) and the limiting ring (11); and a smoothly transitioned chamfer is arranged on the upper ends of the second convex ring (10) and the limiting ring (11).

2. The deep foundation pit green support structure according to claim 1 is characterized in that: An anchor (13) is movably provided on the pulling pile (2), one end of the anchor (13) can penetrate and extend out of the pulling pile (2) away from the side wall of the retaining pile (1), and a linkage component for driving the anchor (13) to move is provided in the pulling pile (2), and the linkage component is driven by the driving component after the collar (5) descends to the lowest position of the lifting stroke.

3. The deep foundation pit green support structure according to claim 2 is characterized in that: The side wall of the pulling pile (2) is provided with a through hole (14) for the anchor (13) to pass through, the inner top surface and the inner bottom surface of the through hole (14) are provided with elastic clamping blocks (15), and the anchor (13) is arranged between the two elastic clamping blocks (15).

4. The deep foundation pit green support structure according to claim 2 is characterized in that: The linkage assembly comprises a rotating column (16) rotatably arranged in the pulling pile (2), a rotating disk (17) coaxially fixedly sleeved on the rotating column (16), a sliding column (19) slidably connected to the rotating disk (17) via a gradual sliding groove (18), and the sliding column (19) is connected to one end of the anchor (13) so as to remain in the pulling pile (2).

5. The deep foundation pit green support structure according to claim 4 is characterized in that: A linkage shaft (20) is rotatably arranged inside the pile pulling (2); the lower end of the first threaded sleeve (8) is coaxially fixedly connected to a first gear (21); the upper end of the linkage shaft (20) is coaxially fixedly connected to a second gear (22) meshing with the first gear (21); the lower end of the linkage shaft (20) is coaxially fixedly connected to a third gear (23); and the upper end of the rotary column (16) is coaxially fixedly connected to a fourth gear (24) meshing with the third gear (23).

6. The deep foundation pit green support structure according to claim 5 is characterized in that: The slide column (19) is hingedly connected to the anchor (13), and the slide column (19) can be raised and lowered relative to the turntable (17). The lower end of the linkage shaft (20) is provided with a pressing component for pressing down the upper end of the slide column (19) when the anchor (13) extends to the maximum length of the pulling pile (2).

7. The deep foundation pit green support structure according to claim 6 is characterized in that: A sliding sleeve (25) is slidably arranged in the gradual sliding groove (18), and the sliding sleeve (25) is axially movably sleeved on the sliding column (19). An elastic member (26) is connected between one end of the sliding sleeve (25) and the sliding column (19) in the same direction.

8. The deep foundation pit green support structure according to claim 6 is characterized in that: The pressing assembly comprises a second screw rod (27) coaxially connected to the lower end of the linkage shaft (20); the lower end of the second screw rod (27) is threadedly sleeved with a second threaded sleeve (28); the lower end of the second threaded sleeve (28) is fixedly connected with a pressing block (29) which is movably arranged in the pulling pile (2) for lifting; when the anchor (13) is close to extending the pulling pile (2) to its maximum length, the upper end of the sliding column (19) is arranged corresponding to the lower side of the pressing block (29).

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