Waterproof loess compaction pile composite foundation structure and construction method thereof

Abstract

The present application relates to the field of foundation structure and construction technology, particularly relates to a kind of water-resisting lime-soil compaction pile composite foundation structure and construction method thereof.The main technical problem of water-resisting lime-soil compaction pile in prior art is that soil collapsibility has great influence, and the composite layer structure of compaction pile is unstable, which easily causes rework problem.In the technical solution, the compaction pile stable structure is the base of the whole compaction pile, the anchor rod is inserted into the base soil layer, which provides rigid connection, and the setting of the stable ring enables more backfill rammed lime soil to be compacted during the backfill process, so that the whole compaction pile is more stable, and the rework rate is greatly reduced.The compaction pile stable structure as a rigid part increases the overall density of the compaction pile, and the influence of radial force of collapsible soil layer is smaller, and potential stress can be conducted through the anchor rod to ensure the stability of the pile body.

Description

Technical Field

[0001] This invention relates to the field of foundation structure and construction technology, and in particular to a water-resistant lime-soil compaction pile composite foundation structure and its construction method. Background Technology

[0002] Water-resistant lime-soil, also known as compacted backfill lime-soil used in compaction piles, is a commonly used foundation treatment material in existing technologies. The mixing ratio is typically 3:7 or 2:8 (often referred to as type 37 or 28 in technical terminology). It is mainly used for foundation reinforcement and seepage prevention, with compaction pile construction being the most common method. Compaction piles are a foundation treatment technology that uses mechanical drilling and filling with specific materials to form piles, improving the foundation through lateral compaction. The principle is to drive the pile into the soil layer or vibrate it to compact the soil particles, thereby increasing the bearing capacity of the foundation, reducing compressibility, and eliminating collapsibility. It is mainly used for foundation treatment in collapsible loess areas. The collapsible loess's tendency to sink when exposed to water necessitates foundation treatment in these areas to alter this characteristic and ensure the safety of the superstructure. Compaction pile foundation treatment usually involves using lime-soil compaction piles to treat the entire collapsible loess layer to a thickness that is the depth of the entire collapsible loess layer. This can change the soil structure of the collapsible loess layer and eliminate the soil collapsibility. In the prior art, such as the Chinese utility model patent, publication number CN219364557U, patent name "Waterproof Lime-Soil Compacting Pile Composite Artificial Foundation Device", the main treatment measure of its technical solution is to increase the number of reinforcement holes, thereby reducing the number of compaction passes and thus improving production efficiency; However, the main technical problems of existing water-resistant lime-soil compaction piles are that the soil collapsibility has a large impact, the composite layer structure of the compaction piles is unstable and easy to cause rework, and there is a lack of technical problems with more stable compaction pile composite layer foundations. Summary of the Invention

[0003] The present invention addresses the main technical problems of existing water-resistant lime-soil compaction piles, namely, the significant impact of soil collapsibility, the instability of the composite layer structure of the compaction piles leading to rework, and the lack of a more stable foundation technology for the composite layer of the compaction piles. The invention provides a water-resistant lime-soil compaction pile composite foundation structure and its construction method.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A water-resistant lime-soil compaction pile composite foundation structure includes: Piles are constructed at the construction site, the pile holes passing through the collapsible soil layer and reaching the base soil layer; The compaction pile stabilization structure is placed at a predetermined position at the bottom of the pile hole, so that the compaction pile stabilization structure The anchor rod is inserted into the foundation soil layer, and the stabilizing ring of the compaction pile stabilization structure is embedded in the foundation soil layer; The pile hole is filled with backfilled rammed soil, which is then compacted to form a compacted pile body. A compacted pile composite layer is formed by repeatedly compacting the compacted pile body at a preset height along its height direction. The compaction pile stabilization structure is located in the bottom compaction pile composite layer; The backfill rammed earth is either type 28 or type 37 rammed earth. The compaction pile stabilization structure includes a mounting and dismantling structure. It can be connected to a driven tube, and after the driven tube is inserted into the pile hole and the compaction pile stabilizing structure reaches the bottom of the pile hole, the compaction pile stabilizing structure is disengaged from the driven tube by performing a pressing action on the driven tube.

[0005] Furthermore, the compaction pile stabilization structure includes: A stable base, which has a stable base; A stabilizing column is provided at the center of the stabilizing base, and a base space is formed below the stabilizing base, with the stabilizing column penetrating into the base space; The first end of the stabilizing column extends through the stabilizing base.

[0006] Furthermore, the stabilizing ring is connected radially to the stabilizing base, and the height of the stabilizing ring is greater than the height of the stabilizing base; The upper and lower ends of the stabilizing ring and the upper and lower ends of the stabilizing base form a soil embedding space; The upper and lower ends of the stabilizing ring form inclined conical surfaces.

[0007] Furthermore, the anchor rod includes: An anchor rod body, with a fixing plate connected to its first end, the fixing plate being connected to the second end of the stabilizing column, the fixing plate being located within the base space; The diameter of the fixed plate is smaller than the diameter of the base space, and a compaction pile gap ring area is formed within the base space.

[0008] Furthermore, the stabilizing base has a neck located above the stabilizing base; The first end of the stabilizing column is provided with an external thread; The stabilizing column is connected to a cap structure via a threaded connection; The stabilizing post can be fitted with a movable sleeve component, which can slide between the cap structure and the neck, and the sliding range is limited by the cap structure and the neck.

[0009] Furthermore, the movable sleeve component has an upper arc-shaped conical surface and a lower arc-shaped convex surface; The inclination angle of the lower arc-shaped vertebral surface is greater than the inclination angle of the upper arc-shaped vertebral surface.

[0010] Furthermore, the cap structure includes: The body has a flat top, and a spherical arc surface is formed radiating outward from the flat top in a second direction; The spherical arc surface and the body form a limiting recess below the body.

[0011] The construction method for the aforementioned water-resistant lime-soil compaction pile composite foundation structure includes the following steps: Step S1: After the pile hole passes through the collapsible soil layer and reaches the base soil layer, a release component is connected to the lower part of the driven pipe. The release component includes a snap-fit ​​lever that can generate a rebound; A threaded connection is constructed at the bottom of the submerged tube; The compaction pile stabilizing structure and the snap-fit ​​rod have a prefabricated initial state, such that the snap-fit ​​rod is located between the snap cap structure and the movable sleeve component through the spherical arc surface.

[0012] Step S1: Suspend the driven tube into the pile hole until the anchor rod body is inserted into the base soil layer. By continuously hammering the driven tube at the top, the anchor rod body and the stabilizing ring are embedded in the base soil layer at the bottom of the pile hole. Step S2: After the anchor rod body and the stabilizing ring are embedded in the base soil layer at the bottom of the pile hole, the snap-fit ​​rod passes along the upper arc cone surface of the movable sleeve component and is snapped into the lower arc cone surface. Step S3, attempt to lift the sinking tube. After compression, the clamping rod loosens along the lower arc vertebral surface and drives the movable sleeve component to slide towards the clamping cap structure and loosens from the clamping cap structure. Meanwhile, the stable base is consistently located at the bottom of the pile hole, maintaining the anchoring rod body in the anchored state of the foundation soil layer. Step S4: Fill the pile hole with backfilled rammed earth. First, compact the bottom compaction pile composite layer, and then gradually compact it to a preset height to form multiple compaction pile composite layers.

[0013] Implementably, the release component includes: A connector, the first end of which is connected to the threaded connection part, and the second end of the connector is connected to a snap-fit ​​platform, with a reserved space formed between the snap-fit ​​platform and the threaded connection part; The card slot and the connector have internal channels; The inner channel is connected to the submerged tube; The locking platform has an inner horizontal hole, and a locking rod is provided in the inner horizontal hole. The locking rod has an inclined surface, and the inclination of the inclined surface is used to match the spherical arc surface. A spring is connected to one end of the snap-fit ​​rod located inside the inner horizontal hole.

[0014] Implementably, it also includes: pre-positioning a reflective sheet on the flat top during the execution of step S1; After performing step S4, a bracket is set above the pile hole, and an infrared rangefinder is installed on the bracket. The detection end of the infrared rangefinder is oriented towards the pile hole, and the reflector is used as the detection target.

[0015] In this technical solution, the compaction pile stabilization structure serves as the base of the entire compaction pile system. The anchor rods are inserted into the base soil layer, providing a rigid connection that enhances overall stability. The stabilization rings allow for greater compaction of the backfill soil at the bottom of the pile hole during backfilling. This means the actual volume of the bottom compaction pile composite layer can exceed the volume of the compaction pile composite layer itself, resulting in a larger compaction pile composite layer as the pile bottom. This makes the overall compaction pile system more stable, significantly reducing rework rates. Furthermore, the stabilization structure, as a rigid component, increases the overall density of the compaction piles, reducing their susceptibility to radial forces from collapsible soil layers. The anchor rods also transmit potential stress, ensuring pile stability.

[0016] Since this technical solution adds a rigid component to the compaction pile, and this rigid component is the stabilizing structure of the compaction pile, the proper placement of the stabilizing structure of the compaction pile also requires a solution. This solution uses a driven tube, which is a hollow tube. Its outer diameter can be used to guide the pile hole, making the pile diameter controllable. In addition, the driven tube can also be used as a component to send the stabilizing structure of the compaction pile into the bottom of the pile hole, ensuring that the stabilizing structure of the compaction pile is installed in place. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram illustrating the application configuration of the water-resistant lime-soil compaction pile composite foundation structure of the present invention; Figure 2 Example 1 shows the state of the compaction pile stabilization structure of the present invention; Figure 3 Example 2 shows the state of the compaction pile stabilization structure of the present invention; Figure 4 This is a schematic diagram of the compaction pile stabilization structure of the present invention; Figure 5 This is a schematic diagram of the operating state of the movable sleeve component of the present invention; Figure 6 This is a schematic diagram of the movable sleeve component of the present invention.

[0019] 1. Pile hole; 2. Collapsible soil layer; 3. Foundation soil layer; 6. Waterproof layer; The compaction pile stabilizes the structure with 10 anchor rods, 20 anchor rods, and 200 stabilizing rings. Backfilled compacted soil 4, compaction pile composite layer 101, bottom compaction pile composite layer 102; It is equipped with a disassembly structure 30, a submerged tube 5, and a support frame 7; 11. Stable base; 12. Stable column; 13. Base space; Stabilizing ring 200, soil embedding space 210, inclined cone surface 220; Anchor rod body 230, fixing plate 231, compaction pile gap ring area 232; Neck 15, Cap structure 310, Movable sleeve component 320; Upper arc cone surface 321, lower arc cone surface 322; Body 311, flat top 312, spherical arc surface 322, limiting socket 313; Release component 40, locking rod 422, threaded connection part 51; Connector 41, snap-fit ​​platform 42, reserved space 415, inner channel 412; Inclined plane 423, spring 424, infrared rangefinder 314, reflector 313. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that, for ease of description, in this application, "left side" is referred to as "first end", "right side" as "second end", "upper side" as "first end", and "lower side" as "second end" in the current view. The purpose of such description is to clearly express the technical solution and should not be construed as an improper limitation of the technical solution of this application.

[0021] This invention addresses the main technical problems of existing impermeable lime-soil compaction piles, namely the significant impact of soil collapsibility, the instability of the composite layer structure leading to rework, and the lack of more stable foundation technology for the composite layer of compaction piles. It provides an impermeable lime-soil compaction pile composite foundation structure and its construction method, with appended details. Figure 1 The schematic diagrams in the diagrams illustrate multiple application scenarios of this impermeable lime-soil compaction pile composite foundation structure. First, please refer to the appendix. Figure 1In the above, the implementation method of pile A and pile B is the implementation method of the dense pile stabilization structure 10 arrangement, wherein pile A is the arrangement of the dense pile stabilization structure 10 in the bottom compaction pile composite layer 102. Pile A is a dense pile stable structure 10, which is filled into a compaction pile as a whole; The water-resistant lime-soil compaction pile composite foundation structure includes: constructing pile hole 1 at the construction site, with pile hole 1 penetrating a collapsible soil layer 2. And reach the foundation soil layer 3; place the compaction pile stabilization structure 10 at the preset position at the bottom of the pile hole 1, so that the anchor rod 20 of the compaction pile stabilization structure 10 is inserted into the foundation soil layer 3, and the stabilization ring 200 of the compaction pile stabilization structure 10 is embedded in the foundation soil layer 3. Backfill rammed soil 4 is filled into pile hole 1 and compacted to form compacted pile body 100. In addition, compacted pile composite layer 101 is formed by repeatedly compacting the compacted pile body 100 at a preset height. Among them, the compaction pile stabilization structure 10 is located in the bottom compaction pile composite layer 102; Among them, the backfill rammed lime soil is either type 28 lime soil or type 37 lime soil; In this technical solution, the compaction pile stabilization structure 10 is as shown in the attached figure. Figure 1 The entire base of pile B, with anchor rods 20 inserted. The base soil layer 3 provides a rigid connection, making the B pile more stable overall. The stabilizing ring 200 allows for greater compaction of the backfill soil 4 at the bottom of the pile hole 1 during backfilling. This means the actual volume of the bottom compaction pile composite layer 102 can be greater than that of the compaction pile composite layer 101, resulting in a larger compaction pile composite layer. As the pile bottom, this makes the overall compaction pile more stable, significantly reducing rework. Furthermore, the rigid structure 10 increases the overall density of the compaction pile, reducing the impact of radial forces from the collapsible soil layer 2. The anchor rod 20 can also transmit potential stress, ensuring pile stability. The final implementation effect is as follows: Figure 1 The condition of pile B.

[0022] The compaction pile stabilization structure 10 includes a mounting and dismantling structure 30, which is capable of engaging with a driven tube 5. The connection is made such that after the driven tube 5 is inserted into the pile hole 1 and the compaction pile stabilizing structure 10 reaches the bottom of the pile hole 1, the driven tube 5 is pressed down to make the compaction pile stabilizing structure 10 separate from the driven tube 5. Since this technical solution adds a rigid component to the compaction pile, and this rigid component is the compaction pile stabilization structure 10, the placement of the compaction pile stabilization structure 10 also requires a solution. This solution uses a driven tube 5, which is a hollow tube. Its outer diameter can be used to guide the pile hole 1, so that the pile diameter of the pile hole 1 can be controlled. The driven tube 5 can also be used as a component to send the compaction pile stabilization structure 10 into the bottom of the pile hole 1, ensuring that the compaction pile stabilization structure 10 is installed in place.

[0023] In one specific embodiment, please refer to Figure 2 , 3 As shown in Figures 4 and 5, the compaction pile stabilization structure 10 includes: a stabilization base 11, which has a stabilization base 12; a stabilization column 13 is provided at the center of the stabilization base 11, a base space 14 is formed below the stabilization base 12, and the stabilization column 13 passes through the base space 14; the first end of the stabilization column 13 passes through the stabilization base 11, and the stabilization column 13 and the stabilization base 12 are used to stabilize the center of gravity. In one specific embodiment, please refer to Figure 2 , 3 As shown in Figures 4 and 5, the stabilizing ring 200 is connected to the radial direction of the stabilizing base 12, and the height of the stabilizing ring 200 is greater than the height of the stabilizing base 12; the upper and lower ends of the stabilizing ring 200 and the upper and lower ends of the stabilizing base 12 form a soil embedding space 210; the upper and lower ends of the stabilizing ring 200 form an inclined conical surface 220. The upper end of the stabilizing ring 200 forms an inclined conical surface 220, which is used to provide shear force for the backfill rammed soil 4; The lower end of the stabilizing ring 200 forms an inclined conical surface 220, which is used to embed into the base soil layer 3 to provide shear force; The embedded space 210 and the stabilizing ring 200 provide compaction pressure for the rammed lime soil 4, which helps to achieve a larger area of ​​compaction. In one specific embodiment, please refer to Figure 1 , 4 As shown, the anchor rod 20 includes: an anchor rod body 230, the first end of which is connected to a fixing plate 231, the fixing plate 231 is connected to the second end of the stabilizing column 13, and the fixing plate 231 is located in the base space 14; the diameter of the fixing plate 231 is smaller than the diameter of the base space 14, and a compaction pile gap ring area 232 is formed in the base space 14. The compaction pile gap ring area 232 is also used to provide a compaction surface to ensure the compaction effect of the bottom compaction pile composite layer 102.

[0024] In one specific embodiment, please refer to Figure 4 , 5 As shown, the stabilizing base 11 has a neck 15, which is located above the stabilizing base 12. The space formed by the neck 15 and the stabilizing base 12 is used to guide the backfill rammed soil 4 and also to provide a compaction surface.

[0025] The first end of the stabilizing column 13 is provided with an external thread; The stabilizing column 13 is connected to a cap structure 310 via a threaded connection; The stabilizing column 13 can be fitted with a movable sleeve component 320, which can slide between the cap structure 310 and the neck 15, and the sliding range is limited by the cap structure 310 and the neck 15.

[0026] In one specific embodiment, please refer to Figure 6 , 4 As shown in Figure 5, the movable sleeve component 320 has an upper arc-shaped conical surface 321. The lower arc vertebral surface 322 has a greater cone inclination angle than the upper arc vertebral surface 321.

[0027] The cap structure 310 includes: a body 311 having a flat top 312, and a spherical arc surface 322 radiating outward in a second direction along the flat top 312; the spherical arc surface 322 and the body 311 form a limiting recess 313 below the body 311, for cooperating with the lower part of the immersed tube 5 to connect a release component 40 and subsequent positioning measurement.

[0028] The construction method for a composite foundation structure using impermeable lime-soil compaction piles includes the following steps, which can be found in the appendix. Figure 1 The construction steps for C-piles and D-piles are as follows: Step S1: After the pile hole 1 passes through the collapsible soil layer 2 and reaches the base soil layer 3, a release component 40 is connected to the lower part of the driven pipe 5. The release component 40 includes a spring-loaded latching rod 422; A threaded connection part 51 is constructed below the immersed tube 5; The compaction pile stabilization structure 10 and the snap-fit ​​rod 422 have a prefabricated initial state, such that the snap-fit ​​rod 422 is located between the snap cap structure 310 and the movable sleeve component 320 through the spherical arc surface 322.

[0029] Step S2: Suspend the pipe 5 into the pile hole 1 until the anchor rod body 230 is inserted into the soil layer 3. By continuously hammering the pipe 5 at the top, the anchor rod body 230 and the stabilizing ring 200 are embedded in the soil layer 3 at the bottom of the pile hole 1. Step S3: After the anchor rod body 230 and the stabilizing ring 200 are embedded in the base soil layer 3 at the bottom of the pile hole 1, the locking rod 422 passes along the upper arc cone surface 321 of the movable sleeve component 320 and is locked in the lower arc cone surface 322. Step S4, attempt to lift the sinking pipe 5. After compression, the clamping rod 422 loosens along the lower arc vertebral surface 322 and drives the movable sleeve part 320 to slide towards the clamping cap structure 310 and loosens from the clamping cap structure 310. Meanwhile, the stable base 11 is consistently located at the bottom of the pile hole 1, maintaining the anchoring rod body 230 in the anchoring state of the bottom soil layer 3. Step S5: Fill the pile hole 2 with backfill rammed soil. First, compact the bottom compaction pile composite layer 102, and then gradually compact it to a preset height to form multiple compaction pile composite layers 101.

[0030] For a specific implementation method, please refer to Figure 4 , 5 As shown, the release component 40 includes: a connecting body 41, the first end of which is connected to the threaded connection portion 51, and the second end of the connecting body 41 is connected to a snap-fit ​​platform 42, with a reserved space 415 formed between the snap-fit ​​platform 42 and the threaded connection portion 51; the snap-fit ​​platform 42 and the connecting body 41 have an inner hole channel 412. The inner channel 412 is connected to the sinker tube 5; the locking platform 42 has an inner horizontal hole 421, and a locking rod 422 is provided in the inner horizontal hole 421. The locking rod 422 has an inclined surface 423, and the inclined trend of the inclined surface 423 is used to cooperate with the spherical arc surface 322; a spring 424 is connected to one end of the locking rod 422 located in the inner horizontal hole 421.

[0031] In one specific embodiment, please refer to Figure 1 As shown in the C-pillar diagram, it also includes: during the execution of step S1, a reflective sheet 313 is pre-installed on the flat top 312; after the execution of step S4, a bracket 7 is installed above the pile hole 2. An infrared rangefinder 314 is installed on the bracket 7. The detection end of the infrared rangefinder 314 is directed toward the pile hole 2 and the reflector 313 is used as the detection target. Infrared distance measurement can be performed when the sinking tube 5 is being arranged or pulled out to detect the actual positioning and obtain the relative depth data of the pile hole 1.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A water-resistant lime-soil compaction pile composite foundation structure, characterized in that, include: A pile hole (1) is constructed at the construction site, the pile hole (1) passes through the collapsible soil layer (2) and reaches the base soil layer (3). The compaction pile stabilization structure (10) is placed at a predetermined position at the bottom of the pile hole (1), so that the compaction pile stabilization structure (10) The anchor rod (20) is inserted into the base soil layer (3), and the stabilizing ring (200) of the compaction pile stabilizing structure (10) is embedded in the base soil layer (3). Backfilled rammed soil (4) is filled into the pile hole (1) and compacted to form a compacted pile body (100). A compacted pile composite layer (101) is formed by repeatedly compacting the compacted pile body (100) at a preset height in the height direction of the compacted pile body (100). The compaction pile stabilization structure (10) is located in the bottom compaction pile composite layer (102). The backfill rammed earth is either type 28 or type 37 rammed earth. The compaction pile stabilization structure (10) includes a mounting and dismantling structure (30). It can be connected to a sinking pipe (5), and after the sinking pipe (5) is inserted into the pile hole (1) and the compaction pile stabilizing structure (10) reaches the bottom of the pile hole (1), the compaction pile stabilizing structure (10) is disengaged from the sinking pipe (5) by performing a pressing action on the sinking pipe (5).

2. The water-resistant lime-soil compaction pile composite foundation structure as described in claim 1, characterized in that, The compaction pile stabilization structure (10) includes: A stable base (11) having a stable base (12); A stabilizing column (13) is provided at the center of the stabilizing base (11), and a base space (14) is formed below the stabilizing base (12), with the stabilizing column (13) penetrating into the base space (14). The first end of the stabilizing column (13) extends through the stabilizing base (11).

3. The composite foundation structure of water-resistant lime-soil compaction piles as described in claim 2, characterized in that, The stabilizing ring (200) is connected radially to the stabilizing base (12), and the height of the stabilizing ring (200) is greater than the height of the stabilizing base (12). The upper and lower ends of the stabilizing ring (200) and the upper and lower ends of the stabilizing base (12) form a soil embedding space (210). The upper and lower ends of the stabilizing ring (200) form inclined conical surfaces (220).

4. The composite foundation structure of impermeable lime-soil compaction piles as described in claim 3, characterized in that, The anchor rod (20) includes: An anchor rod body (230) has a first end connected to a fixing plate (231), the fixing plate (231) is connected to the second end of the stabilizing column (13), and the fixing plate (231) is located in the base space (14); The diameter of the fixed plate (231) is smaller than the diameter of the base space (14), and a compaction pile gap ring region (232) is formed in the base space (14).

5. The water-resistant lime-soil compaction pile composite foundation structure as described in claim 4, characterized in that, The stabilizing base (11) has a neck (15) located above the stabilizing base (12); The first end of the stabilizing column (13) is provided with an external thread; The stabilizing column (13) is connected to a cap structure (310) by a threaded connection. The stabilizing post (13) can be fitted with a movable sleeve component (320), which can slide between the cap structure (310) and the neck (15), and the sliding range is limited by the cap structure (310) and the neck (15).

6. The composite foundation structure of impermeable lime-soil compaction piles as described in claim 5, characterized in that, The movable sleeve component (320) has an upper arc conical surface (321) and a lower arc conical surface (322). The inclination angle of the lower arc cone surface (322) is greater than the inclination angle of the upper arc cone surface (321).

7. The water-resistant lime-soil compaction pile composite foundation structure as described in claim 6, characterized in that, The cap structure (310) includes: The body (311) has a flat top (312) and a spherical arc surface (322) radiating outward in a second direction along the flat top (312). The spherical arc surface (322) and the body (311) form a limiting recess (313) below the body (311). The construction method of the water-resistant lime-soil compaction pile composite foundation structure as described in claim 7 is characterized by comprising the following steps: Step S1: After the pile hole (1) passes through the collapsible soil layer (2) and reaches the base soil layer (3), a release component (40) is connected to the bottom of the sinking pipe (5). The release component (40) includes a spring-loaded snap-fit ​​lever (422). A threaded connection (51) is constructed below the submerged tube (5); The compaction pile stabilizing structure (10) and the snap-fit ​​rod (422) have a prefabricated initial state, such that the snap-fit ​​rod (422) is located between the snap cap structure (310) and the movable sleeve component (320) through the spherical arc surface (322).

8. Step S2, the sinking pipe (5) is suspended into the pile hole (1) until the anchor rod body (230) is inserted into the base soil layer (3). By continuously hammering the sinking pipe (5) at the top, the anchor rod body (230) and the stabilizing ring (200) are embedded in the base soil layer (3) at the bottom of the pile hole (1). Step S3: After the anchor rod body (230) and the stabilizing ring (200) are embedded in the base soil layer (3) at the bottom of the pile hole (1), the snap-fit ​​rod (422) passes along the upper arc cone surface (321) of the movable sleeve component (320) and is snapped on the lower arc cone surface (322). Step S4, attempt to lift the sinking pipe (5). After compression, the clamping rod (422) loosens along the lower arc vertebral surface (322) and drives the movable sleeve part (320) to slide towards the clamping cap structure (310) and loosens from the clamping cap structure (310). Meanwhile, the stable base (11) is consistently located at the bottom of the pile hole (1), maintaining the anchoring rod body (230) in the anchoring state of the base soil layer (3). Step S5: Fill the pile hole (2) with backfill rammed soil. First, compact the bottom compaction pile composite layer (102) and gradually compact it to form multiple compaction pile composite layers (101) at a preset height.

9. The construction method of the water-resistant lime-soil compaction pile composite foundation structure as described in claim 8, characterized in that, The release component (40) includes: The connector (41) has its first end connected to the threaded connection part (51), and its second end connected to a snap-fit ​​platform (42), forming a reserved space (415) between the snap-fit ​​platform (42) and the threaded connection part (51). The snap-fit ​​platform (42) and the connector (41) have an inner channel (412). The inner channel (412) is connected to the submerged tube (5); The locking platform (42) has an inner horizontal hole (421), and the inner horizontal hole (421) is provided with a locking rod (422). The locking rod (422) has an inclined surface (423), and the inclined surface (423) is inclined to fit the spherical arc surface (322). A spring (424) is connected to one end of the snap-fit ​​rod (422) located inside the inner horizontal hole (421).

10. The construction method of the water-resistant lime-soil compaction pile composite foundation structure as described in claim 8, characterized in that, Also package Includes: During the execution of step S1, a reflective sheet (313) is pre-positioned on the flat top (312). After performing step S4, a bracket (7) is set above the pile hole (2), and an infrared rangefinder (314) is installed on the bracket (7). The detection end of the infrared rangefinder (314) is directed toward the pile hole (2) and the reflector (313) is used as the detection target.

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