A slope soft soil foundation pile-cable reinforcement structure, reinforcement system and construction method

Abstract

The present invention relates to the field of geotechnical engineering, and in particular to a pile-cable reinforcement structure, reinforcement system and construction method for a slope soft soil foundation, wherein the pile-cable reinforcement structure for a slope soft soil foundation comprises longitudinal beams arranged at intervals, a crossbeam is connected between the corresponding ends of adjacent longitudinal beams, a grid anchor cable is connected to both the crossbeam and the longitudinal beam, a first pile foundation is connected to the bottom of the longitudinal beam, a second pile foundation is arranged at the bottom of the crossbeam, and the bottom of the grid anchor cable is also connected to the first pile foundation and / or the second pile foundation. A pile-cable reinforcement structure for a slope soft soil foundation of the present invention solves the problem of foundation settlement deformation; resists greater adverse horizontal forces of a slope soft soil foundation; the grid anchor cable can reduce the suspended distance of the upper embankment structure between the second pile foundations, and has good durability, so that the sinking deformation of the upper embankment structure can be controlled for a long time, the setting spacing of the second pile foundation can be increased, and the pile cap setting on the top of the traditional pile-net structure can be cancelled, which can greatly save engineering investment.

Description

Technical Field

[0001] The invention relates to the field of geotechnical engineering, and in particular to a slope soft soil foundation pile-cable reinforcement structure, a reinforcement system and a construction method. Background Art

[0002] Sloping soft soil foundations are widely distributed in hilly and mountainous areas of my country. Usually, this foundation condition is accompanied by uneven thickness of soft soil distribution and inclined rock-soil boundary. The deformation and stability of slope soft soil foundation under the load of fill body are different from those of horizontal soft soil foundation. The embankment project on slope soft soil foundation needs to solve the problems of uneven foundation settlement deformation and worse stability of slope roadbed.

[0003] The construction of high fill embankments or high-speed railway embankment projects on soft soil foundations has high requirements for deformation and stability. In this case, pile net structures are usually used for foundation reinforcement. Pile net structures can better solve the problems of foundation settlement and stability, but usually the reinforcement piles need to be spaced smaller to meet the requirements, resulting in huge project investment. The reinforcement of slope soft soil foundations is even more difficult and requires a larger investment.

[0004] Therefore, it is of great significance to propose a better fill reinforcement structure for slope soft soil foundation, which should have the characteristics of good settlement deformation and stability control effect, good economy, convenient construction, environmental protection and conducive to promotion and application. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that when a pile-net structure is used to reinforce a slope soft soil foundation, the reinforcement piles need to be spaced relatively small to meet the requirements, resulting in large engineering investment. A pile-cable reinforcement structure, a reinforcement system and a construction method for a slope soft soil foundation are provided. The structure is economical while ensuring the settlement deformation and stability of a high-speed railway embankment project.

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

[0007] A pile-cable reinforcement structure for a slope soft soil foundation comprises longitudinal beams arranged at intervals, cross beams are connected between the corresponding ends of adjacent longitudinal beams, grid anchor cables are arranged in the area enclosed by the cross beams and the longitudinal beams, the grid anchor cables are connected to both the cross beams and the longitudinal beams, a first pile foundation is connected to the bottom of the longitudinal beam, a second pile foundation is arranged at the bottom of the cross beam, and the bottom of the grid anchor cables is also connected to the first pile foundation or the second pile foundation.

[0008] A slope soft soil foundation pile-cable reinforcement structure described in the present application can effectively solve the problem of foundation settlement and deformation through the first pile foundation and the second pile foundation; the first pile foundation and the second pile foundation can provide greater resistance and the connection of the two rows of first pile foundations through the crossbeam and the longitudinal beam can increase the integrity of the structure and resist greater adverse horizontal forces of the slope soft soil foundation; to solve the adverse horizontal forces generated by the slope soft soil foundation, through the connection of the grid anchor cable, the deformation and force generated by all the first pile foundations and the second pile foundations can work together, and the overall ability to resist horizontal forces is further enhanced. At the same time, the grid anchor cable can effectively reduce the suspended distance of the upper embankment structure between the second pile foundations, and has good durability, so that the sinking deformation of the upper embankment structure can be controlled for a long time. At the same time, the setting spacing of the second pile foundations can be increased, and the pile cap setting on the top of the traditional pile net structure can be cancelled, which can greatly save engineering investment.

[0009] The grid anchor cable is a component formed by connecting multiple anchor cables in a mesh distribution. The ends of the outer anchor cables connected to the outside are the end nodes of the grid anchor cables, and the intersection points of the ends of the outer anchor cables connected to the inner anchor cables and the ends connected to the adjacent inner anchor cables are the internal nodes.

[0010] Preferably, the lattice anchor has end nodes, wherein:

[0011] In the length direction of the cross beam, the end nodes at both ends of the grid anchor cable are connected to the longitudinal beam and are located above the first pile foundation at the bottom of the longitudinal beam;

[0012] In the length direction of the longitudinal beam, the remaining end nodes at both ends of the grid anchor cable are connected to the cross beam and are located above the second pile foundation at the bottom of the cross beam.

[0013] Preferably, the grid anchor cable further has internal nodes, the internal nodes are located inside the end nodes, and the bottom of at least one of the internal nodes is connected to the first pile foundation or the second pile foundation.

[0014] Preferably, the grid of the grid anchor cable is a diamond-shaped structure.

[0015] The diamond-shaped arrangement of the grid anchor cables can more effectively reduce the suspended distance of the buffer layer between the second pile foundations and has good durability, thereby making the sinking and deformation of the buffer layer above the diamond-shaped grid anchor cables controllable for a long time.

[0016] Preferably, the first pile foundation and / or the second pile foundation and / or the cross beam and / or the longitudinal beam are connected to the grid anchor cable through a steel pull ring, which is safe, reliable and simple to construct.

[0017] Preferably, the cross-sectional dimension of the first pile foundation is greater than the cross-sectional dimension of the second pile foundation.

[0018] The first pile foundation with a larger cross-section can provide greater resistance, thereby solving the horizontal force generated by the soft soil foundation on the slope.

[0019] Preferably, the diameter of the first pile foundation is greater than or equal to 2.0 m, and the diameter of the second pile foundation is greater than or equal to 0.6 m.

[0020] In the above scheme, the construction machinery and price performance ratio are combined to conclude that the diameter of the first pile foundation is greater than or equal to 2.0m, and the diameter of the second pile foundation is greater than or equal to 0.6m, which has a high cost performance ratio.

[0021] Preferably, a buffer layer is provided on the top of the grid anchor cable, and an embankment structure is provided on the top of the buffer layer.

[0022] The setting of the buffer layer enables the deformation and force coordination between the upper embankment structure and the first pile foundation, the second pile foundation, the cross beam and the longitudinal beam structure at the lower part, and the filling body of the embankment structure will not penetrate into the soft soil layer at the lower part.

[0023] The present invention also discloses a reinforcement system having the slope soft soil foundation pile-cable reinforcement structure, comprising a soft soil layer and a foundation bearing layer located at the bottom of the soft soil layer, wherein the first pile foundation and the second pile foundation both extend into the foundation bearing layer.

[0024] The reinforcement system with the slope soft soil foundation pile-cable reinforcement structure described in the present application, the first pile foundation and the second pile foundation both pass through the soft soil layer and extend into the foundation bearing layer, the foundation bearing layer can provide the first pile foundation and the second pile foundation with good vertical and horizontal supporting forces, so that the slope soft soil foundation pile-cable reinforcement structure described in the present application can meet the requirements of settlement deformation and stability of high-speed railway embankment engineering.

[0025] Preferably, the depth of the first pile foundation extending into the foundation bearing layer is greater than the depth of the second pile foundation extending into the foundation bearing layer, and it is used as the main pile foundation for resisting horizontal forces.

[0026] The present invention also discloses a construction method for the slope soft soil foundation pile-cable reinforcement structure, comprising the following steps:

[0027] S1: constructing the first pile foundation and the second pile foundation, and pre-embedding a steel pull ring for connecting the grid anchor cable at the top of the first pile foundation and / or the second pile foundation connected to the grid anchor cable;

[0028] S2: constructing the cross beam and the longitudinal beam, and pre-embedding steel pull rings for connecting the grid anchor cables on the cross beam and the longitudinal beam;

[0029] S3: connecting the grid anchor cable to all the pre-buried steel pull rings, and tightening and fixing the grid anchor cable;

[0030] S4: constructing a buffer layer on the mesh anchor cable;

[0031] S5: constructing an embankment structure on the buffer layer.

[0032] The construction method for the pile-cable reinforcement structure for the slope soft soil foundation described in the present application ensures the effective connection between the grid anchor cable and the first pile foundation, the second pile foundation, the cross beam and the longitudinal beam through the steel pull ring. The entire construction process can ensure the effective implementation of the pile-cable reinforcement structure for the slope soft soil foundation described in the present application. Moreover, the entire construction process is fast and simple, the construction quality is easy to control, and the construction cost is low.

[0033] Preferably, step S1 specifically comprises the following steps:

[0034] S11: leveling the soft soil layer, performing plane positioning of the first pile foundation and the second pile foundation, constructing the first pile foundation and the second pile foundation so that the bottoms of the first pile foundation and the second pile foundation extend into the foundation bearing layer at the bottom of the soft soil layer, wherein:

[0035] The stress-bearing steel bars of the second pile foundation located at the bottom of the crossbeam are exposed to the top of the pile by more than or equal to 0.3m;

[0036] The stress-bearing steel bars of the first pile foundation located at the bottom of the longitudinal beam are exposed to the top of the pile by more than or equal to 0.3m;

[0037] S12: pre-embed a steel pull ring for connecting the grid anchor cable at the top of the first pile foundation and / or the second pile foundation connected to the grid anchor cable, wherein the main cross-sectional direction of the steel pull ring is perpendicular to the setting direction of the grid anchor cable.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. A pile-cable reinforcement structure for a sloped soft soil foundation of the present invention can effectively solve the problem of foundation settlement and deformation through the first pile foundation and the second pile foundation; the first pile foundation and the second pile foundation can provide greater resistance and the connection of the two rows of first pile foundations through the crossbeam and the longitudinal beam can increase the integrity of the structure and can resist greater adverse horizontal forces of the sloped soft soil foundation; to solve the adverse horizontal forces generated by the sloped soft soil foundation, through the connection of the grid anchor cable, the deformation and force generated by all the first pile foundations and the second pile foundations can work together, and the overall ability to resist horizontal forces is further enhanced. At the same time, the grid anchor cable can effectively reduce the suspended distance of the upper embankment structure between the second pile foundations, and has good durability, so that the sinking deformation of the upper embankment structure can be controlled for a long time. At the same time, the setting spacing of the second pile foundations can be increased, and the pile cap setting on the top of the traditional pile net structure can be cancelled, which can greatly save engineering investment.

[0040] 2. In a slope soft soil foundation pile-cable reinforcement structure of the present invention, the rhombus arrangement of the grid anchor cables can more effectively reduce the suspended distance of the buffer layer between the second pile foundations, and has good durability, so that the sinking and deformation of the buffer layer above the rhombus of the grid anchor cables can be controlled for a long time.

[0041] 3. In the pile-cable reinforcement structure for a slope soft soil foundation of the present invention, the buffer layer is arranged so that the upper embankment structure and the lower first pile foundation, second pile foundation, cross beam and longitudinal beam structure can achieve deformation and force coordination, and the filling body of the embankment structure will not penetrate into the lower soft soil layer.

[0042] 4. In the reinforcement system of the present invention having the slope soft soil foundation pile-cable reinforcement structure, the first pile foundation and the second pile foundation both pass through the soft soil layer and extend into the foundation bearing layer, and the foundation bearing layer can provide the first pile foundation and the second pile foundation with good vertical and horizontal supporting forces, so that the slope soft soil foundation pile-cable reinforcement structure described in the present application can ensure the settlement deformation and stability requirements of the high-speed railway embankment project.

[0043] 5. The present invention provides a construction method for the pile-cable reinforcement structure of the slope soft soil foundation, which ensures the effective connection between the grid anchor cable and the first pile foundation, the second pile foundation, the cross beam and the longitudinal beam through the steel pull ring. The entire construction process can ensure the effective implementation of the pile-cable reinforcement structure of the slope soft soil foundation described in this application. Moreover, the entire construction process is fast and simple, the construction quality is easy to control, and the construction cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic plan view of a slope soft soil foundation pile-cable reinforcement structure of the present invention;

[0045] Figure 2 The present invention Figure 1 Schematic diagram of the middle AA section;

[0046] Figure 3 The present invention Figure 1 Schematic diagram of the middle BB section;

[0047] Markings in the figure: 1-first pile foundation, 2-second pile foundation, 3-cross beam, 4-longitudinal beam, 5-grid anchor cable, 51-end node, 52-internal node, 6-buffer layer, 7-embankment structure, 8-soft soil layer, 9-foundation bearing layer, DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0049] Example 1

[0050] like Figure 1-3 As shown, a slope soft soil foundation pile-cable reinforcement structure of the present invention comprises:

[0051] The invention comprises longitudinal beams (4) arranged at intervals, wherein a cross beam (3) is connected between corresponding ends of adjacent longitudinal beams (4), a grid anchor cable (5) is arranged in an area enclosed by the cross beam (3) and the longitudinal beam (4), the grid anchor cable (5) is connected to both the cross beam (3) and the longitudinal beam (4), the bottom of the longitudinal beam (4) is connected to a first pile foundation (1), the bottom of the cross beam (3) is arranged with a second pile foundation (2), and the bottom of the grid anchor cable (5) is also connected to the first pile foundation (1) or the second pile foundation (2).

[0052] The grid anchor cable (5) has end nodes (51) and internal nodes (52), wherein:

[0053] In the length direction of the cross beam (3), the end nodes at both ends of the grid anchor cable (5) are connected to the longitudinal beam (4) and are located above the first pile foundation (1) at the bottom of the longitudinal beam (4);

[0054] In the length direction of the longitudinal beam (4), the remaining end nodes at both ends of the grid anchor cable (5) are connected to the cross beam (3) and are located above the second pile foundation (2) at the bottom of the cross beam (3).

[0055] The internal nodes (52) are located inside the end nodes (51), and the bottom of at least one of the internal nodes (52) is connected to the first pile foundation (1) or the second pile foundation (2).

[0056] Specifically:

[0057] The first pile foundation 1 is arranged in rows and intervals in the foundation rock and soil on both sides of the slope foot of the embankment structure 7, passing through the slope soft soil layer 8 and entering the stable foundation bearing layer 9, which is generally a hard rock and soil layer;

[0058] The second pile foundations 2 are arranged at intervals in the rock and soil mass at the base of the embankment structure 7 between the first pile foundations 1;

[0059] The cross beams 3 are arranged at intervals along the longitudinal direction of the line in sections and on the tops of the first pile foundation 1 and the second pile foundation 2, and are fixedly connected thereto;

[0060] The longitudinal beams 4 are arranged in sections on the top of the first pile foundations 1 in a row and are fixedly connected thereto;

[0061] A grid anchor cable 5 is rhombus-shaped and fixed on the top of the first pile foundation 1 and the second pile foundation 2 in the segment. The grid anchor cable 5 has an end node 51 and an internal node 52. The internal node 52 is located inside the end node 51. The bottom of at least one of the internal nodes 52 is connected to the first pile foundation 1 or the second pile foundation 2.

[0062] A buffer layer 6 is built on top of the first pile foundation 1, the second pile foundation 2 and the grid anchor cable 5;

[0063] The embankment structure 7 is built in layers on the buffer layer 6.

[0064] The first pile foundation 1 and the second pile foundation 2 arranged in sections are reinforced concrete bored pile structures, the section length is generally 20-30m, the pile spacing is generally 2.5-3.0m, the diameter of the first pile foundation 1 is not less than 2.0m, and the diameter of the second pile foundation 2 is not less than 0.6m; the crossbeam 3 is a reinforced concrete structure, the width is not less than the diameter of the second pile foundation 2, and one is generally arranged every 2-3 rows of pile foundations; the grid anchor cable 5 is protected by a flexible casing after anti-corrosion treatment, and is tightened and fixed on the top of the first pile foundation 1 and the second pile foundation 2; the buffer layer 6 is composed of 0.6m thick crushed stone sandwiched between two layers of high-strength geogrid.

[0065] The beneficial effects of this embodiment are as follows: the problem of foundation settlement and deformation can be effectively solved by the first pile foundation 1 and the second pile foundation 2 arranged at intervals; the first pile foundation 1 can provide greater resistance to solve the horizontal force generated by the slope soft soil foundation, and the two rows of first pile foundations 1 can increase the integrity of the structure through the connection of the crossbeam 3 and the longitudinal beam 4, and can resist the greater adverse horizontal force of the slope soft soil foundation; through the connection of the grid anchor cable 5, the deformation and force generated by all the first pile foundations 1 and the second pile foundation 2 can work together, and the overall ability to resist horizontal force is further enhanced. At the same time, the diamond arrangement of the grid anchor cable 5 can most effectively reduce the suspended distance of the buffer layer 6 between the second pile foundations 2, and has good durability, so that the sinking deformation of the buffer layer 6 can be controlled for a long time, the setting spacing of the second pile foundation 2 can be increased, and the pile cap setting on the top of the traditional pile net structure is cancelled, which can greatly save the project investment; the setting of the buffer layer 6 enables the upper embankment structure 7 and the lower first pile foundation 1, the second pile foundation 2, the crossbeam 3 and the longitudinal beam 4 structure to achieve deformation and force coordination, and the embankment structure 7 will not penetrate into the lower soft soil layer 8.

[0066] Example 2

[0067] like Figure 1-3 As shown, the reinforcement system described in this embodiment has a slope soft soil foundation pile-cable reinforcement structure as described in Example 1, including a soft soil layer 8 and a foundation bearing layer 9 located at the bottom of the soft soil layer 8, and the first pile foundation 1 and the second pile foundation 2 both extend into the foundation bearing layer 9.

[0068] On the basis of the above, in a further preferred embodiment, the depth of the first pile foundation 1 extending into the foundation bearing layer 9 is greater than the depth of the second pile foundation 2 extending into the foundation bearing layer 9, and the first pile foundation 1 is used as the main pile foundation to resist horizontal forces.

[0069] The beneficial effects of this embodiment are as follows: a reinforcement system having the slope soft soil foundation pile-cable reinforcement structure, wherein the first pile foundation 1 and the second pile foundation 2 both pass through the soft soil layer 8 and extend into the foundation bearing layer 9, and the foundation bearing layer 9 can provide the first pile foundation 1 and the second pile foundation 2 with good vertical and horizontal supporting forces, so that the slope soft soil foundation pile-cable reinforcement structure described in this application can ensure the settlement deformation and stability requirements of the high-speed railway embankment project.

[0070] Example 3

[0071] like Figure 1-3 As shown, the construction method of the pile-cable reinforcement structure for the slope soft soil foundation described in the embodiment 1 comprises the following steps:

[0072] A. Level the site, locate the first pile foundation 1 and the second pile foundation 2 in a plane, construct the first pile foundation 1 and the second pile foundation 2, and set the pile foundation corresponding to the cross beam 3 and the longitudinal beam 4, with the stressed steel bar exposed at the top of the pile not less than 0.3m;

[0073] B. Before the initial setting of the concrete of the second pile foundation 2, a steel pull ring is embedded at the top of the pile foundation where the cross beam 3 and the longitudinal beam 4 are not provided, and the main cross-sectional direction of the steel pull ring is perpendicular to the setting direction of the grid anchor cable 5;

[0074] C. constructing a cross beam 3 reinforced concrete and a longitudinal beam 4 reinforced concrete on the top of the corresponding first pile foundation 1 and the second pile foundation 2, and fixing them to the exposed steel bars of the lower pile foundation;

[0075] D. Before the initial setting of the concrete of the cross beam 3 and the longitudinal beam 4, a steel pull ring is embedded at the top, and the main cross-section direction of the steel pull ring is perpendicular to the setting direction of the grid anchor cable 5;

[0076] E. Pass through all pre-buried steel pull rings, install and tighten the grid anchor cable 5 in a diamond shape, and the grid anchor cable 5 is reversely wound and fixedly connected with the steel pull ring;

[0077] F. Construction buffer layer 6;

[0078] G. Build the embankment structure 7 in layers on the buffer layer 6.

[0079] The beneficial effects of this embodiment are as follows: this construction method can effectively solve the problem of foundation settlement deformation by means of the first pile foundation 1 and the second pile foundation 2 arranged at intervals; the first pile foundation 1 can provide greater resistance to solve the horizontal force generated by the slope soft soil foundation, and the two rows of first pile foundations 1 can increase the integrity of the structure by connecting the cross beam 3 and the longitudinal beam 4, and can resist greater adverse horizontal forces of the slope soft soil foundation; through the connection of the grid anchor cable 5, the deformation and force generated by all the first pile foundations 1 and the second pile foundation 2 can work together, and the overall ability to resist horizontal forces is further enhanced. At the same time, the diamond arrangement of the grid anchor cable 5 can most effectively reduce the first pile foundation 1 and the second pile foundation 2. The suspended distance of the buffer layer 6 between the two pile foundations 2 is large and has good durability, so that the sinking deformation of the buffer layer 6 can be controlled for a long time, the setting spacing of the second pile foundation 2 can be increased, and the pile cap setting on the top of the traditional pile net structure is cancelled, which can greatly save the project investment; the setting of the buffer layer 6 enables the upper embankment structure 7 and the lower first pile foundation 1, second pile foundation 2, cross beam 3 and longitudinal beam 4 structure to achieve deformation and force coordination, and the embankment structure 7 will not penetrate into the lower soft soil layer 8. Moreover, this construction method ensures the effective realization of the function of the combined structure, and has the characteristics of fast and simple construction, easy quality control, environmental protection, and conducive to promotion.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile-cable reinforcement structure for a slope soft soil foundation, characterized in that: The invention comprises longitudinal beams (4) arranged at intervals, wherein a transverse beam (3) is connected between corresponding ends of adjacent longitudinal beams (4), a grid anchor cable (5) is arranged in an area enclosed by the transverse beam (3) and the longitudinal beam (4), the grid anchor cable (5) is connected to both the transverse beam (3) and the longitudinal beam (4), the bottom of the longitudinal beam (4) is connected to a first pile foundation (1), the bottom of the transverse beam (3) is arranged with a second pile foundation (2), and the bottom of the grid anchor cable (5) is also connected to the first pile foundation (1) or the second pile foundation (2); The first pile foundation (1) and / or the second pile foundation (2) and / or the cross beam (3) and / or the longitudinal beam (4) are connected to the grid anchor cable (5) via a steel pull ring; A buffer layer (6) is arranged on the top of the grid anchor cable (5), and an embankment structure (7) is arranged on the top of the buffer layer (6).

2. The pile-cable reinforcement structure for slope soft soil foundation according to claim 1, characterized in that: The lattice anchor cable (5) has an end node (51), wherein: In the length direction of the cross beam (3), the end nodes at both ends of the grid anchor cable (5) are connected to the longitudinal beam (4) and are located above the first pile foundation (1) at the bottom of the longitudinal beam (4); In the length direction of the longitudinal beam (4), the remaining end nodes at both ends of the grid anchor cable (5) are connected to the cross beam (3) and are located above the second pile foundation (2) at the bottom of the cross beam (3).

3. The pile-cable reinforcement structure for slope soft soil foundation according to claim 2, characterized in that: The grid anchor cable (5) further comprises an internal node (52), wherein the internal node (52) is located inside the end node (51), and the bottom of at least one of the internal nodes (52) is connected to the first pile foundation (1) or the second pile foundation (2).

4. The pile-cable reinforcement structure for slope soft soil foundation according to claim 1, characterized in that: The grid of the grid anchor cable (5) is a diamond-shaped structure.

5. A pile-cable reinforcement structure for a slope soft soil foundation according to any one of claims 1 to 4, characterized in that: The cross-sectional dimension of the first pile foundation (1) is greater than the cross-sectional dimension of the second pile foundation (2).

6. A reinforcement system having a slope soft soil foundation pile-cable reinforcement structure according to any one of claims 1 to 5, comprising a soft soil layer (8) and a foundation bearing layer (9) located at the bottom of the soft soil layer (8), characterized in that: The first pile foundation (1) and the second pile foundation (2) both extend into the foundation bearing layer (9).

7. A method for constructing the reinforcement system according to claim 6, characterized in that: The following steps are involved: S1: constructing the first pile foundation (1) and the second pile foundation (2), and pre-embedding a steel pull ring for connecting the grid anchor cable (5) at the top of the first pile foundation (1) and / or the second pile foundation (2) connected to the grid anchor cable (5); S2: constructing the cross beam (3) and the longitudinal beam (4), and pre-embedding steel pull rings for connecting the grid anchor cable (5) on the cross beam (3) and the longitudinal beam (4); S3: connecting the grid anchor cable (5) to all the pre-buried steel pull rings, and tightening and fixing the grid anchor cable (5); S4: constructing a buffer layer (6) on the grid anchor cable (5); S5: constructing an embankment structure (7) on the buffer layer (6).

8. The construction method according to claim 7, characterized in that: Step S1 specifically includes the following steps: S11: leveling the soft soil layer (8), performing plane positioning of the first pile foundation (1) and the second pile foundation (2), constructing the first pile foundation (1) and the second pile foundation (2), so that the bottoms of the first pile foundation (1) and the second pile foundation (2) extend into the foundation bearing layer (9) at the bottom of the soft soil layer (8), wherein: The stress-bearing steel bars of the second pile foundation (2) located at the bottom of the crossbeam (3) are exposed from the top of the pile by more than or equal to 0.3 m; The stress-bearing steel bars of the first pile foundation (1) located at the bottom of the longitudinal beam (4) are exposed to the top of the pile by more than or equal to 0.3m; S12: A steel pull ring for connecting the grid anchor cable (5) is embedded in the top of the first pile foundation (1) and / or the second pile foundation (2) connected to the grid anchor cable (5), wherein the main cross-sectional direction of the steel pull ring is perpendicular to the installation direction of the grid anchor cable (5).

Images