A hanging foot pile three-dimensional cooperative support instability prevention and control structure

Abstract

The application discloses a kind of foot pile three-dimensional cooperative support instability prevention and control structures, belong to foundation pit supporting engineering technical field, including first, second foundation pile assembly being oppositely arranged in the inside of foundation pit, it is connected through scalable first protective structure between adjacent foundation piles, it is connected through space cross truss type second protective structure between corresponding foundation piles across foundation pit, and the top end of foundation pile is fixed with crown beam, and the bottom end is fixed with support structure.The first protective structure contains telescopic rod and supporting assembly, which can adapt to different foundation pile spacing;Second protective structure forms a three-dimensional cooperative stress system;Support structure is embedded in soil by connecting ring and connecting rib and connecting anchor to realize double fixation.The application solves the problems of poor adaptability, weak anti-instability ability, complicated installation and other problems of traditional structure, has the advantages of stable structure, strong adaptability, convenient construction, reliable bearing, and is suitable for various foundation pit supporting engineering.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support engineering technology, and in particular to a three-dimensional collaborative support structure for preventing instability caused by suspended piles. Background Technology

[0002] In foundation pit construction, suspended pile support is widely used in complex geological conditions such as soft soil and sand due to its advantages of convenient construction and controllable cost. However, traditional suspended pile support structures have the following technical defects: The transverse protective structures between adjacent piles are mostly fixed-length connecting rods, which cannot be adjusted according to the pile spacing, resulting in poor adaptability and insufficient connection stability, making them prone to loosening. The collaborative support structures for piles spanning the foundation pit are mostly unidirectionally arranged support rods, lacking a three-dimensional, cross-shaped collaborative force-bearing design, resulting in weak overall resistance to lateral displacement and instability. The connection between the bottom of the piles and the bottom of the foundation pit is mostly achieved through simple casting and fixing, lacking multiple limiting and interlocking structures, resulting in limited bearing capacity and making them prone to settlement or tilting during foundation pit excavation. The clamping components of the protective structures are cumbersome to install, have low positioning accuracy, and cannot quickly achieve a firm connection with the piles, affecting construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a structurally stable, highly adaptable, and well-coordinated structure for preventing instability in suspended pile support.

[0004] To achieve the above objectives, the present invention provides a three-dimensional collaborative support structure for preventing instability of suspended piles, comprising a first pile assembly and a second pile assembly arranged opposite to each other on the inner side of the foundation pit. The first pile assembly includes a plurality of vertically parallel first piles, and the second pile assembly includes a plurality of vertically parallel second piles. Adjacent first piles and adjacent second piles are fixedly connected by a first protective structure, and the first piles and corresponding second piles are fixedly connected by a second protective structure. The top ends of the first piles and the second piles are fixedly connected to the lower surface of the cap beam, and the bottom ends are fixedly connected to the support structure at the bottom of the foundation pit.

[0005] Preferably, the first protective structure includes a telescopic rod, which is composed of an inner tube and an outer tube coaxially assembled. The top end of the inner tube passes through the central opening at the bottom end of the outer tube and extends into the interior of the outer tube, and the inner tube and the outer tube form an axial telescopic fit.

[0006] Preferably, a limiting block is symmetrically fixed at the top of the outer surface of the inner tube, and a limiting groove adapted to the limiting block is vertically opened on the inner wall of the outer tube along the axial direction. The limiting block is embedded in the limiting groove and forms an axial sliding fit to limit the relative circumferential rotation of the inner tube and the outer tube.

[0007] Preferably, the outer tube has a plurality of first connecting holes evenly distributed along its length, the first connecting holes being perpendicular to the axis of the outer tube and penetrating the outer tube wall; the inner tube has at least one second connecting hole that matches the first connecting holes, and the fixing bolts sequentially pass through the aligned first connecting holes and second connecting holes to achieve telescopic positioning and fixing of the inner tube and the outer tube; the top end of the outer tube is fixedly provided with a first support component, and the bottom end of the inner tube is fixedly provided with a second support component.

[0008] Preferably, the first support assembly includes a first support rod, which is vertically fixed to the top of the outer tube. Both ends of the first support rod have mounting holes along its axial direction, and a first fixing rod is slidably fitted in the mounting holes. An arc-shaped clamp is fixed to the end of the first fixing rod away from the first support rod. Fixing plates are symmetrically fixed on both sides of the open end of the arc-shaped clamp, and threaded holes are opened through both sides of the fixing plates.

[0009] Preferably, threaded rings are rotatably fitted at the connection points of the first support rod at both ends and the corresponding first fixed rod. A protrusion is symmetrically fixed on the outer surface of the first fixed rod near the end of the first support rod. A groove adapted to the protrusion is formed on the inner wall of the mounting hole along the axial direction of the first support rod. The protrusion is embedded in the groove and forms an axial sliding fit. An external thread is formed on the outer surface of the first fixed rod corresponding to the threaded ring, and an internal thread is formed on the inner wall of the threaded ring. The threaded ring and the first fixed rod form a threaded fit. A magnetic protrusion is also fixed on the surface of the fixing plate of the first fixed rod on one side of the first support rod, and a magnetic groove adapted to the magnetic protrusion is formed on the surface of the fixing plate of the first fixed rod on the other side. The structure of the second support assembly is completely identical to that of the first support assembly.

[0010] Preferably, the second protective structure includes a plurality of support rods, which are arranged in a spatially intersecting truss configuration; an upper connecting seat is fixed to the upper outer surface of the first pile and a lower connecting seat is fixed to the lower outer surface; an upper connecting seat is fixed to the upper outer surface of the second pile and a lower connecting seat is fixed to the lower outer surface; the upper connecting seat of the first pile is hinged to the lower connecting seats of two second piles symmetrically adjacent to each other on the other side of the pit via two symmetrically arranged support rods; the lower connecting seat of the first pile is hinged to the upper connecting seats of two second piles symmetrically adjacent to each other on the other side of the pit via two symmetrically arranged support rods.

[0011] Preferably, the support structure includes reinforced concrete support plates cast into shape on both sides of the bottom of the foundation pit. The upper surfaces of both support plates are integrally formed with circular support seats adapted to the bottom ends of the first and second foundation piles. A circular slot is formed on the upper surface of the support seat, and a circular through hole is formed at the center of the bottom surface of the slot. The through hole penetrates both the upper and lower surfaces of the support plate. A connecting anchor fixed to the lower surface of the foundation pile penetrates the corresponding through hole and is implanted into the soil at the bottom of the foundation pit. An annular connecting ring is coaxially fixed to the bottom surface of the slot, and several connecting bars are vertically and evenly distributed on the upper surface of the connecting ring. An annular connecting groove adapted to the connecting ring is formed on the lower surface of both the first and second foundation piles. A connecting hole adapted to the connecting bar is formed on the inner wall of the connecting groove, and the connecting bar is embedded in the corresponding connecting hole to form a fixed fit.

[0012] Therefore, the present invention employs the above-mentioned three-dimensional collaborative support instability prevention and control structure for suspended piles, which has the following technical effects: (1) The telescopic rod of the first protective structure of the present invention can accurately adapt to adjacent piles with different spacings by coaxial telescopic cooperation between the inner tube and the outer tube, combined with the circumferential limiting of the limiting block and the limiting groove. The design of multiple sets of first connecting holes makes the telescopic adjustment range wider and the applicability stronger.

[0013] (2) The arc-shaped clamp of the first support component of the present invention fits the surface of the pile, and the fixed rod driven by the threaded ring achieves rigid clamping. The magnetic protrusion and groove assist in positioning, and the bolt locks and fixes, thus ensuring the stability of clamping and avoiding loosening.

[0014] (3) The second protective structure of the present invention adopts a spatial cross truss support rod arrangement to realize the cross-pit three-dimensional coordination of the first foundation pile component and the second foundation pile component, disperse the force, and significantly improve the overall support structure's resistance to instability and lateral displacement.

[0015] (4) The support structure of the present invention uses reinforced concrete support plate to provide foundation bearing, and the fitting and fixing of connecting ring and connecting bar realizes the tight connection between the foundation pile and the support seat. Combined with the connection anchor implanted into the soil, a double fixation of "fitting + implantation" is formed, which enhances the bearing capacity and overturning stability of the bottom end of the foundation pile.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a three-dimensional collaborative support and instability prevention structure for suspended piles according to the present invention; Figure 2 This is a front view of a three-dimensional collaborative support instability prevention and control structure for suspended piles according to the present invention; Figure 3 This is a side view of a three-dimensional collaborative support instability prevention and control structure for suspended piles according to the present invention; Figure 4 This is a top view of a three-dimensional collaborative support instability prevention and control structure for suspended piles according to the present invention; Figure 5 This is a schematic diagram of the first protective structure in the three-dimensional collaborative support instability prevention and control structure of the suspended pile according to the present invention; Figure 6 This invention relates to a three-dimensional collaborative support structure for preventing instability of suspended piles. Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-sectional view of the outer tube of the first protective structure in the three-dimensional collaborative support instability prevention and control structure of the suspended pile of the present invention; Figure 8 This is a schematic diagram of the support base structure in the three-dimensional collaborative support instability prevention and control structure of the suspended pile according to the present invention; Figure 9 This invention relates to a three-dimensional collaborative support structure for preventing instability of suspended piles. Figure 8 Enlarged view at point B in the middle; Figure 10 This is a schematic diagram of the connecting groove structure in the three-dimensional collaborative support instability prevention and control structure of the suspended pile according to the present invention.

[0018] Figure Labels 1. First pile assembly; 11. First pile; 2. Second pile assembly; 21. Second pile; 3. First protective structure; 31. Telescopic rod; 311. Inner tube; 312. Outer tube; 313. Limiting block; 314. Limiting groove; 315. First connecting hole; 316. Second connecting hole; 32. First support assembly; 321. First support rod; 322. Mounting hole; 323. First fixing rod; 324. Arc-shaped clamp; 325. Fixing plate; 326. Threaded hole; 327. Threaded ring; 328. Protrusion; 329. Groove; 330. Magnetic protrusion; 331. Magnetic groove; 33. Second support assembly; 4. Second protective structure; 41. Support rod; 42. Upper connecting seat; 43. Lower connecting seat; 5. Crown beam; 6. Support structure; 61. Support plate; 62. Support seat; 63. Slot; 64. Through hole; 65. Connecting anchor; 66. Connecting ring; 67. Connecting rib; 68. Connecting groove; 69. Connecting hole. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figures 1 to 4 As shown, a three-dimensional collaborative support instability prevention and control structure for suspended piles includes a first pile component 1, a second pile component 2, a first protective structure 3, a second protective structure 4, a cap beam 5, and a support structure 6.

[0022] The first pile assembly 1 and the second pile assembly 2 are symmetrically distributed inside the foundation pit. The first pile assembly 1 consists of several vertically parallel first piles 11, and the second pile assembly 2 consists of several vertically parallel second piles 21. The number of first piles 11 and second piles 21 is the same, and their positions correspond one-to-one. Adjacent first piles 11 and adjacent second piles 21 are horizontally fixedly connected by the first protective structure 3. The first piles 11 and the corresponding second piles 21 are three-dimensionally connected across the foundation pit by the second protective structure 4. The tops of the first piles 11 and the second piles 21 are fixedly connected to the lower surface of the capping beam 5, and the bottoms are fixedly connected to the support structure 6 at the bottom of the foundation pit, forming an overall support system of "top capping beam 5 constraint - middle three-dimensional coordination - bottom stable support".

[0023] like Figures 5 to 7As shown, the first protective structure 3 is a telescopic and adjustable protective component, the core of which includes a telescopic rod 31, a first support component 32, and a second support component 33. The telescopic rod 31 is composed of an inner tube 311 and an outer tube 312 coaxially assembled. The top of the inner tube 311 passes through the central opening at the bottom of the outer tube 312 and extends into the interior of the outer tube 312, forming an axial telescopic fit, and the overall length can be adjusted according to the spacing between adjacent foundation piles. A limiting block 313 is symmetrically fixed at the top of the outer surface of the inner tube 311, and a limiting groove 314 adapted to the limiting block 313 is vertically opened along the axial direction on the inner wall of the outer tube 312. The limiting block 313 is embedded in the limiting groove 314 and forms an axial sliding fit, which can effectively limit the relative circumferential rotation of the inner tube 311 and the outer tube 312, ensuring... During the telescopic process, the structure is aligned; the outer wall of the outer tube 312 is evenly provided with several first connecting holes 315 along the length direction. The first connecting holes 315 are perpendicular to the axis of the outer tube 312 and penetrate through the wall of the outer tube 312. The surface of the inner tube 311 is provided with at least one second connecting hole 316 that is adapted to the first connecting hole 315. When the telescopic rod 31 is adjusted to the target length, the fixing bolts pass through the aligned first connecting holes 315 and second connecting holes 316 in sequence to realize the telescopic positioning and fixing of the inner tube 311 and the outer tube 312, and the connection is reliable; the top end of the outer tube 312 is fixed with a first support component 32, and the bottom end of the inner tube 311 is fixed with a second support component 33. The two are respectively fixedly connected to the adjacent foundation piles above and below to realize the lateral protection of the adjacent foundation piles.

[0024] The first support component 32 and the second support component 33 have completely identical structures. Taking the first support component 32 as an example, its specific structure includes: a first support rod 321, which is vertically fixed to the top of the outer tube 312 and serves as a load-bearing base; mounting holes 322 are provided at both ends of the first support rod 321 along its axial direction, and a first fixing rod 323 is slidably fitted in the mounting holes 322, which can move axially along the mounting holes 322; an arc-shaped end of the first fixing rod 323 away from the first support rod 321 is fixed. The clamp 324 has an arc shape that matches the outer circle of the pile, allowing it to fit snugly against the pile surface for stable clamping. A fixing plate 325 is symmetrically fixed on both sides of the open end of the arc-shaped clamp 324, and threaded holes 326 are drilled through each fixing plate 325 for locking the arc-shaped clamp 324 with bolts. Threaded rings 327 are rotatably fitted at the connection points between both ends of the first support rod 321 and the corresponding first fixing rod 323. The outer surface of the first fixing rod 323 is closer to the end of the first support rod 321. Symmetrically fixed protrusions 328 are provided. A groove 329, matching the protrusion 328, is formed on the inner wall of the mounting hole 322 along the axis of the first support rod 321. The protrusion 328 is embedded in the groove 329, forming an axial sliding fit, restricting the circumferential rotation of the first fixed rod 323. An external thread is formed on the outer surface of the first fixed rod 323 corresponding to the threaded ring 327, and an internal thread is formed on the inner wall of the threaded ring 327. The threaded ring 327 and the first fixed rod 323 form a threaded fit; rotating the threaded ring 327 drives the first support rod 321. A fixed rod 323 moves axially along the mounting hole 322 to achieve the opening and closing adjustment of the arc-shaped clamp 324; the first fixed rod 323 on one side of the first support rod 321 has a magnetic protrusion 330 fixed on the surface of its fixed plate 325, and the first fixed rod 323 on the other side has a magnetic groove 331 on the surface of its fixed plate 325 that matches the magnetic protrusion 330. When the arc-shaped clamp 324 clamps the foundation pile, the magnetic protrusion 330 and the magnetic groove 331 are attracted and cooperate to assist in positioning, improve installation efficiency and clamping stability.

[0025] The second protective structure 4 is a three-dimensional collaborative support component spanning the foundation pit, including several support rods 41 and connecting seats: the several support rods 41 are distributed in a spatially intersecting truss manner to form a three-dimensional force-bearing system, improving the overall resistance to lateral displacement and instability; the upper outer surface of the first foundation pile 11 is fixed with an upper connecting seat 42, and the lower outer surface is fixed with a lower connecting seat 43; the upper outer surface of the second foundation pile 21 is fixed with an upper connecting seat 42, and the lower outer surface is fixed with a lower connecting seat 43; the connecting seats are all fixed to the foundation piles by welding or bolting. The connection ensures the strength of the connection; the upper connecting seat 42 of the first pile 11 is hinged to the lower connecting seat 43 of the two second piles 21 that are symmetrically adjacent on the other side of the foundation pit through two symmetrically arranged support rods 41; the lower connecting seat 43 of the first pile 11 is hinged to the upper connecting seat 42 of the two second piles 21 that are symmetrically adjacent on the other side of the foundation pit through two symmetrically arranged support rods 41, forming a cross-type cooperative support, so that the first pile assembly 1 and the second pile assembly 2 form a force-bearing community.

[0026] like Figures 8 to 10 As shown, the support structure 6 is a stable load-bearing component at the bottom of the foundation pile, including a reinforced concrete support plate 61, a support base 62, a connecting ring 66, and a connecting anchor 65. The support plate 61 is a reinforced concrete component cast into shape on both sides of the bottom of the foundation pit, with high strength load-bearing capacity. The upper surface of both support plates 61 is integrally formed with a circular support base 62 that is adapted to the bottom of the first foundation pile 11 and the second foundation pile 21. The support base 62 is cast integrally with the support plate 61, resulting in strong structural integrity. A circular slot 63 is opened on the upper surface of the support base 62, and a circular through hole 64 is opened at the center of the bottom surface of the slot 63. The through hole 64 penetrates the upper and lower surfaces of the support plate 61, and the connecting anchor 65 fixed on the lower surface of the foundation pile penetrates the corresponding through hole 64 and is embedded in the support plate 61. The pile is inserted into the bottom soil of the foundation pit to further enhance the pull-out and overturning resistance of the bottom end of the pile. A ring-shaped connecting ring 66 is coaxially fixed on the bottom surface of the groove 63. Several connecting bars 67 are vertically and evenly distributed on the upper surface of the connecting ring 66. Both the connecting ring 66 and the connecting bars 67 are made of steel bars and are cast as one piece with the support plate 61. The lower surface of the first pile 11 and the second pile 21 are provided with ring-shaped connecting grooves 68 that are adapted to the connecting ring 66. The inner wall of the connecting groove 68 is provided with connecting holes 69 that are adapted to the connecting bars 67. When the pile is installed, the connecting ring 66 is embedded in the connecting groove 68 and the connecting bars 67 are embedded in the corresponding connecting holes 69 to form a fixed fit, realizing a tight connection between the pile and the support base 62 and improving the bearing stability.

[0027] Working principle: Excavate the foundation pit to the preset depth according to the design dimensions, and level the soil at the bottom of the foundation pit; tie the steel reinforcement cage at the preset positions on both sides of the bottom of the foundation pit, install the formwork, pour C35 concrete to form the support plate 61 and the integrally formed support base 62, fix the connecting ring 66 and connecting bar 67 in the groove 63 of the support base 62, and cure until the concrete strength reaches the standard; vertically hoist the first foundation pile 11 and the second foundation pile 21 to the preset position, so that the connecting groove 68 at the bottom of the foundation pile is aligned with the connecting ring 66 of the support base 62, the connecting bar 67 is embedded in the connecting hole 69, and the connecting anchor 65 on the lower surface of the foundation pile is inserted into the soil at the bottom of the foundation pit 1.5m through the through hole 64. Fill the gap between the connecting groove 68 and the connecting ring 66 with fine stone concrete to fix the bottom of the foundation pile; A first protective structure 3 is installed between adjacent first foundation piles 11 and adjacent second foundation piles 21. The relative positions of the inner tube 311 and outer tube 312 of the telescopic rod 31 are adjusted so that the first support component 32 and the second support component 33 are aligned with the upper and lower foundation piles respectively. The limiting block 313 slides along the limiting groove 314 to ensure that the second connecting hole 316 is aligned with the corresponding first connecting hole 315. The fixing bolt is inserted and locked. The threaded ring 327 is rotated to drive the first fixing rod 323 to extend. The arc-shaped clamp 324 fits against the surface of the foundation pile. The magnetic protrusion 330 and the magnetic groove 331 are attracted and positioned. The bolt is locked through the threaded hole 326 of the fixing plate 325 to complete the lateral fixing of the adjacent foundation piles. A second protective structure 4 is installed between the first foundation pile 11 and the corresponding second foundation pile 21. The two ends of the support rod 41 are respectively connected to the upper connecting seat 42 of the first foundation pile 11 and the lower connecting seat 43 of the second foundation pile 21, and the lower connecting seat 43 of the first foundation pile 11 and the upper connecting seat 42 of the second foundation pile 21 by pins to form a spatial cross truss support. The steel reinforcement cage of the capping beam 5 is tied to the top of the first pile 11 and the second pile 21. The formwork is installed and C30 concrete is poured to fix the lower surface of the capping beam 5 to the top of the pile. The concrete is cured until the strength meets the standard, and the overall structure installation is completed.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A three-dimensional collaborative support structure for preventing instability of suspended piles, characterized in that: The foundation includes a first pile assembly and a second pile assembly arranged opposite each other inside the foundation pit. The first pile assembly includes a plurality of vertically parallel first piles, and the second pile assembly includes a plurality of vertically parallel second piles. Adjacent first piles and adjacent second piles are fixedly connected by a first protective structure, and the first piles and corresponding second piles are fixedly connected by a second protective structure. The top ends of the first piles and the second piles are fixedly connected to the lower surface of the cap beam, and the bottom ends are fixedly connected to the support structure at the bottom of the foundation pit.

2. The three-dimensional collaborative support and instability prevention structure for suspended piles according to claim 1, characterized in that: The first protective structure includes a telescopic rod, which is composed of an inner tube and an outer tube coaxially assembled. The top end of the inner tube passes through the central opening at the bottom end of the outer tube and extends into the interior of the outer tube, and the inner tube and the outer tube form an axial telescopic fit.

3. The three-dimensional collaborative support and instability prevention structure for suspended piles according to claim 2, characterized in that: The inner tube has symmetrically fixed limiting blocks at the top of its outer surface. The inner wall of the outer tube has vertically opened limiting grooves that are adapted to the limiting blocks along the axial direction. The limiting blocks are embedded in the limiting grooves and form an axial sliding fit to restrict the relative circumferential rotation of the inner tube and the outer tube.

4. The three-dimensional collaborative support and instability prevention structure for suspended piles according to claim 3, characterized in that: The outer tube has a plurality of first connecting holes evenly distributed along its length. The first connecting holes are perpendicular to the axis of the outer tube and penetrate the outer tube wall. The inner tube has at least one second connecting hole that is adapted to the first connecting hole. The fixing bolts pass through the aligned first connecting hole and the second connecting hole in sequence to realize the telescopic positioning and fixing of the inner tube and the outer tube. The top of the outer tube is fixedly provided with a first support component, and the bottom of the inner tube is fixedly provided with a second support component.

5. The three-dimensional collaborative support instability prevention and control structure for suspended piles according to claim 4, characterized in that: The first support assembly includes a first support rod, which is vertically fixed to the top of the outer tube. Both ends of the first support rod have mounting holes along its axial direction, and a first fixing rod is slidably fitted in the mounting holes. An arc-shaped clamp is fixed to the end of the first fixing rod away from the first support rod. Fixing plates are symmetrically fixed on both sides of the open end of the arc-shaped clamp, and threaded holes are opened through both sides of the fixing plates.

6. The three-dimensional collaborative support instability prevention and control structure for suspended piles according to claim 5, characterized in that: Both ends of the first support rod are rotatably fitted with threaded rings at their connection points with the corresponding first fixed rods. A protrusion is symmetrically fixed to one end of the outer surface of the first fixed rod near the first support rod. A groove matching the protrusion is formed on the inner wall of the mounting hole along the axis of the first support rod. The protrusion is embedded in the groove, forming an axial sliding fit. An external thread is formed on the outer surface of the first fixed rod corresponding to the threaded ring, and an internal thread is formed on the inner wall of the threaded ring. The threaded ring and the first fixed rod form a threaded fit. A magnetic protrusion is also fixed to the surface of the fixing plate of the first fixed rod on one side of the first support rod, and a magnetic groove matching the magnetic protrusion is formed on the surface of the fixing plate of the first fixed rod on the other side. The structure of the second support assembly is completely identical to that of the first support assembly.

7. The three-dimensional collaborative support and instability prevention structure for suspended piles according to claim 6, characterized in that: The second protective structure includes several support rods arranged in a spatially intersecting truss configuration. An upper connecting seat is fixed to the upper outer surface of the first pile, and a lower connecting seat is fixed to its lower outer surface. Similarly, an upper connecting seat is fixed to the upper outer surface of the second pile, and a lower connecting seat is fixed to its lower outer surface. The upper connecting seat of the first pile is hinged to the lower connecting seats of two adjacent second piles on the other side of the pit via two symmetrically arranged support rods. The lower connecting seat of the first pile is also hinged to the upper connecting seats of two adjacent second piles on the other side of the pit via two symmetrically arranged support rods.

8. The three-dimensional collaborative support instability prevention and control structure for suspended piles according to claim 7, characterized in that: The supporting structure includes reinforced concrete support plates cast into shape on both sides of the bottom of the foundation pit. The upper surface of each support plate has an integrally formed circular support base adapted to the bottom ends of the first and second foundation piles. A circular slot is formed on the upper surface of each support base, and a circular through hole is formed at the center of the bottom surface of the slot. The through hole penetrates both the upper and lower surfaces of the support plate. A connecting anchor fixed to the lower surface of the foundation pile penetrates the corresponding through hole and is inserted into the soil at the bottom of the foundation pit. An annular connecting ring is coaxially fixed to the bottom surface of the slot, and several connecting bars are vertically and evenly distributed on the upper surface of the connecting ring. An annular connecting groove adapted to the connecting ring is formed on the lower surface of both the first and second foundation piles. A connecting hole adapted to the connecting bar is formed on the inner wall of the connecting groove, and the connecting bar is embedded in the corresponding connecting hole to form a fixed fit.

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