CN115627781B - Slope reinforcement structure for rapidly treating existing slope collapse and construction method - Google Patents

Abstract

The invention discloses a slope reinforcement structure for rapidly treating existing slope collapse and a construction method, wherein at least one row of pile nail combined structures are continuously arranged at the lower part of a slope potential sliding body and at the position close to a slope toe; the pile nail combined structure comprises a main nail, an auxiliary nail, a left wing nail and a right wing nail which are embedded in a side slope stabilized soil layer in a Y shape, wherein the main nail is positioned among the auxiliary nail, the left wing nail and the right wing nail, and the main nail is respectively connected with the auxiliary nail, the left wing nail and the right wing nail through reinforced concrete connecting beams, the connecting beams among the main nail, the left wing nail and the right wing nail form a V-shaped included angle and are arranged facing the side slope potential sliding body, lian Liangping between the main nail and the auxiliary nail are arranged in the main sliding direction of the side slope potential sliding body, so that the main nail and the auxiliary nail of each pile nail combined structure integrally form a double-row pile structure; the pile nail comprises a precast tubular pile and a framework nested in the precast tubular pile, and the precast tubular pile and the framework are cast into a whole by concrete on the side slope site; and a sand cushion layer and an undisturbed soil layer are sequentially paved on the stable soil layer.

Description

Slope reinforcement structure for rapidly treating existing slope collapse and construction method

Technical Field

The invention relates to an existing slope collapse reinforcing structure, in particular to a slope reinforcing structure for rapidly treating existing slope collapse and a construction method.

Background

The occurrence of the landslide not only can cause the loss of lives and property of people, but also seriously hampers the traffic safety operation and damages the natural environment.

Slope slump is related to natural factors and human behaviors, such as unsmooth drainage of the slope caused by rainfall infiltration in natural factors, and original balance of the slope is easily disturbed in construction of a building in artificial behaviors. The mechanism of the slope collapse caused by the natural factors and human behaviors is that on one hand, the sliding capacity of the slope is increased, and on the other hand, the sliding resistance of the slope is weakened. Accordingly, in order to improve the stability of the slope, the slope sliding force is correspondingly reduced and the slope sliding resistance is correspondingly improved.

Currently available measures for improving the slope stability include slope cutting, anti-slide pile reinforcement and prestress anchor cable frame beam system reinforcement. For slope cutting, the aim of reducing the sliding force of the slope is achieved by reducing the slope height and slowing down the slope, and the slope stability is maintained. However, the slope cutting measures require large excavation of the original slope by manual or mechanical work, which changes the original slope topography and damages the local ecological environment. In addition, the improper construction behavior under construction disturbance during slope cutting can cause the local collapse of the excavated slope, thereby causing construction safety accidents. For the reinforcement of the slide-resistant piles and the reinforcement of the prestress anchor cable frame beam system, the slide-resistant pile is used for blocking the slide-down of the side slope by applying artificial structures, and the slide-resistant capability of the side slope is improved. However, both the slide piles and the prestressed anchor cable frame beam systems are excavated and made, a large amount of manpower or machinery is required to complete the construction, and the construction time required for effectively protecting the side slope is long. Therefore, the anti-slide pile or the prestress anchor cable frame beam system reinforcement measures are not suitable for rapidly treating the landslide or the potential landslide, and meanwhile, the construction cost for reinforcing the anti-slide pile and the prestress anchor cable frame beam system is high due to a large amount of manpower and material resource requirements, and an unstable factor is brought to construction safety.

With the acceleration of the construction pace of domestic infrastructure, the disturbance of human behaviors to the original slope is more, and the problem of slope collapse caused by the disturbance becomes more serious. In addition, with the change of the global environment climate, extremely severe weather frequently occurs, and the collapse of the mountain slope is further aggravated. That is, the current situation of slope disposal is very severe, and especially rapid disposal of sudden collapsed or potentially collapsed slopes is an urgent need.

Disclosure of Invention

Aiming at the defects of the existing slope treatment method with slump or potential slump, the invention provides a slope reinforcement structure and a construction method for rapidly and conveniently treating the existing slope slump, which are easy to implement.

In order to solve the technical problems, the invention adopts the following technical scheme:

A slope reinforcement structure for rapidly treating existing slope collapse comprises a slope, wherein at least one row of pile nail combined structures are continuously arranged at the lower part of a potential sliding body of the slope and at a position close to a slope toe;

The pile nail combined structure comprises a main nail, an auxiliary nail, a left wing nail and a right wing nail which are embedded in a side slope stabilized soil layer in a Y shape, wherein the main nail is positioned among the auxiliary nail, the left wing nail and the right wing nail, the main nail is connected with the auxiliary nail, the left wing nail and the right wing nail through reinforced concrete connecting beams respectively, a V-shaped included angle is formed between the connecting beam between the main nail and the left wing nail and the connecting beam between the main nail and the right wing nail, and the V-shaped included angle is arranged facing the side slope potential sliding body, lian Liangping between the main nail and the auxiliary nail is arranged in the main sliding direction of the side slope potential sliding body, so that the main nail and the auxiliary nail of each pile nail combined structure integrally form a double-row pile structure;

the pile nails comprise prefabricated pipe piles and frameworks which are nested in the prefabricated pipe piles, and the prefabricated pipe piles and the frameworks are cast into a whole by concrete on a side slope site;

And a sand cushion layer and an undisturbed soil layer are sequentially paved on the stable soil layer.

Preferably, the left wing nail and the right wing nail are symmetrically arranged, and the V-shaped included angle is between 60 and 120 degrees.

Preferably, the length of the pile nails embedded in the stable soil layer is not less than 1/2 of the pile length.

Preferably, the prefabricated pipe pile is a square or round hollow steel pipe pile, and the pile end of the prefabricated pipe pile is a solid cone.

Preferably, a plurality of diaphragm plates are sequentially arranged on the inner wall of the prefabricated pipe pile along the height direction of the pipe pile.

Preferably, the pile top of the precast tubular pile is provided with a pile cap.

Preferably, the skeleton includes many solid bars with the pile body same length, U type part is connected at the top of solid bar, U type part includes the hollow square part in middle part and two baffles of setting up at square part top surface relatively, the skeleton nestification is in when the precast pile, square part is arranged in the top of precast pile, two baffles are in the side slope potential sliding body main slip direction sets gradually.

Preferably, the hollow section of the square part is consistent with the hollow section of the precast tubular pile, and the minimum thickness of the square part is consistent with the pile wall thickness of the precast tubular pile.

Preferably, the height of the square component is the same as the height of the sand cushion, and the height of the baffle plate is the same as the height of the connecting beam.

Based on the same inventive concept, the invention also provides a slope reinforcement construction method for rapidly treating the existing slope collapse, which comprises the following steps:

(1) According to the requirements of geotechnical engineering investigation Specification, the geological, hydrogeological and stratum distribution conditions of the side slope are ascertained, and the possible range and size and the main sliding direction of the potential sliding body of the side slope are analyzed;

(2) According to the design rule of the side slope anti-slide pile of the building side slope engineering technical specification, combining the size of the pile nails prefabricated pipe pile and the construction requirement, planning the distance between the pile nails, determining the specific position of the pile nails at the toe of the side slope based on the side slope stability evaluation method recommended by the specification and the safety coefficient required to be met by the side slope stability, and calculating the length of the pile nails embedded into a stable soil layer below a side slope potential sliding body;

(3) Gradually carrying out construction of the pile nail combined structure according to any one of claims 1-9 from the stable soil bodies around two sides of the slope potential sliding body to the middle part of the potential sliding body, adopting a pile nail combined structure step-by-step construction mode, and arranging all pile nails according to the sequence of partially excavating, positioning the pile piles, hammering and driving the pile piles, putting the nested skeleton in the pile piles, constructing a sand cushion layer and a slope drain pipe, pouring concrete pile piles and a connecting beam, backfilling original soil, wherein in the process, the discontinuous part of the connecting beam is reserved in square parts of the pile nails, overlapping steel bars are reserved, and then the next pile nail construction is continued until the construction of the pile nail combined structure of the connecting row is completed;

(4) And displacement monitoring points are arranged on the side slope and the pile nails, the change of the side slope displacement after reinforcement is continuously observed, and the stability condition of the side slope is judged, and the effectiveness and the reliability of pile nail combined structure reinforcement are evaluated.

The invention has the structural characteristics that:

(1) The pile nail type reinforcing structure adopts Y-shaped arrangement and consists of the main nails, the auxiliary nails, the left wing nails and the right wing nails, wherein the pile nails are connected by utilizing reinforced concrete connecting beams to form a whole, and the V-shaped structure is formed among the main nails, the left wing nails and the right wing nails, so that the potential sliding body of the side slope can be reinforced in a larger range by playing the synergistic and pushing actions of the main nails and the auxiliary nails, the potential sliding body is treated in a partitioning way, and meanwhile, the main nails and the auxiliary nails form double-row piles, so that the anti-sliding action and the stability of the pile nails are greatly improved;

(2) The Y-shaped pile nail type reinforcing structure is arranged at the lower part of the slope potential sliding body and is close to the slope toe, so that the optimal reinforcing effect of the Y-shaped pile nail type structure can be exerted;

(3) In the Y-shaped pile nail type reinforcing structure, the connecting line of the main nail and the auxiliary nail is parallel to the main sliding direction of the potential sliding body, the left wing nail and the right wing nail are symmetrically arranged, and the V-shaped included angle formed by the left wing nail and the main nail is between 60 and 120 degrees, so that the maximum blocking effect of the Y-shaped pile nail type reinforcing structure on the potential sliding body can be exerted;

(4) The pile nails are embedded in the stable soil layer at the lower part of the potential sliding body, the embedded length is not less than 1/2 of the pile length, and the anti-sliding effect of the pile nails on the potential sliding body is fully exerted;

(5) Under the self anti-slip effect and the Y-shaped layout synergistic effect, the pile nail does not need to be oversized, and can be designed into a small or miniature pile so as to facilitate on-site mechanized construction;

(6) The pile nail comprises the prefabricated pipe pile and the framework nested in the prefabricated pipe pile, so that the manual requirement of site construction can be reduced, and convenience and guarantee are provided for rapid and safe construction;

(7) The prefabricated tubular pile in the pile nail is a square or round hollow steel pipe pile, and the pile end is a solid cone, so that the pile end drives the pile body to be embedded into a soil layer and to penetrate into a stable stratum when the pile nail hammer is hit;

(8) The wall thickness of the precast tubular pile in the pile nail meets the strength requirement required by pile body hammering construction, and the transverse partition plates are arranged in the tubular pile, so that the pile body is prevented from being bent and damaged during pile driving;

(9) The pile head of the prefabricated pipe pile is provided with the pile cap, so that the pile cap can prevent the pile head from directly acting on the pile nail to cause strength damage, and the action of the heavy hammer is uniformly dispersed to the pile body and the pile end to prevent the pile from being askew;

(10) According to the pile nail, the skeleton is nested in the prefabricated pipe pile, and the solid rod piece in the skeleton and the concrete poured later form a combined action, so that the prefabricated pipe pile and the connecting beam form a whole, and the synergistic effect of the Y-shaped pile nail reinforcing structure is further exerted;

(11) In the embedded skeleton of the prefabricated pipe pile, the hollow center of the square part is consistent with the hollow shape of the interior of the prefabricated pipe pile, the thickness (square pipe pile) or the thinnest thickness (round pipe pile) is consistent with the thickness of the pipe pile, the height is the same as the height of a drainage sand cushion layer applied at a later stage, the prefabricated pipe pile and a connecting beam of a pile top are convenient to form a whole after concrete pouring, and the construction of the drainage sand cushion layer between the pile nails cannot collide with the concrete pouring of the connecting beam of the pipe pile and the pile top;

(12) The heights of the front baffle plate and the rear baffle plate arranged in the framework are consistent with the height of the connecting beam, on one hand, the baffle plates connect the prefabricated pipe piles and the connecting beam into a whole at the node of the prefabricated pipe piles and the connecting beam, and on the other hand, the baffle plates can also be used as templates in the casting of the connecting beam;

(13) The pile nail construction process is characterized in that: locally excavating at the pile nail arrangement position to the designed position of the pile top of the pipe pile, positioning the pipe pile, sleeving a pile cap at the pile top, hammering and driving the pipe pile to the designed depth, taking down the pile cap and putting the pile into a nested framework, applying a drainage sand cushion layer between the pile nails, building a continuous beam construction template and binding continuous beam steel bars, pouring concrete to integrate the pipe pile and the continuous beam, removing the continuous beam construction template and backfilling original soil to the initial elevation. According to the construction process, the anti-slip effect of the pile nails on the potential sliding body of the side slope can be rapidly realized, and the purpose of integrally reinforcing the side slope is achieved under the synergistic effect of the Y-shaped pile nail type reinforcing structure.

Compared with the prior art, the invention has the beneficial effects that:

Aiming at the rapid treatment of a slumped or potential slumped slope, the invention develops the Y-shaped pile nail type reinforcing structure, the system provides the Y-shaped layout of the pile nail type reinforcing structure and the pile nail construction procedure, a set of construction methods of 'Y' -shaped pile nail type reinforcing structure 'as-you-go' and 'safe and efficient' are formed, and the purpose that independent small or miniature precast piles form 'Y' -shaped integral and exert the synergistic effect thereof to form the maximum slip resistance effect on the slope is realized.

The method adopts small or miniature prefabricated parts for construction, avoids large excavation of the side slope, reduces construction cost, reduces larger disturbance to the original side slope, achieves the aim of environmental protection, can quickly, safely and effectively realize reinforcement and partition treatment of the side slope under the synergistic effect of the Y-shaped pile nail type structure, and is very beneficial to emergency treatment of unstable side slope.

The structure and the method are easy to implement, quick, convenient, safe, reliable, low in cost, high in efficiency, low in carbon, environment-friendly, good in effect and wide in application range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a slope reinforcement structure according to the present invention.

Fig. 2 is a plan view of the side slope reinforcement structure of the present invention.

Fig. 3 is a perspective view of the structure of the Y-shaped stake of the present invention.

FIG. 4 is a section A-A of FIG. 1.

Fig. 5 is an exploded view of a square peg.

FIG. 6 is a C-C cross-sectional view of a square peg.

Fig. 7 is an exploded view of a circular peg.

Fig. 8 is a D-D cross-sectional view of a circular peg.

FIG. 9 is an E-E section view of the stake of the present invention.

FIG. 10 is a pile construction process diagram of an embodiment of the invention, wherein a is the partial excavation of the pile placement; b is tubular pile positioning and hammering driving; c is that a framework is put into the tubular pile; d is a drainage sand cushion layer (containing a drainage pipe); e is pouring concrete; f is backfill undisturbed soil.

Legend description:

1. a slope surface;

2. a slope bottom surface;

3. A sloping top surface;

4. A potential slider;

5. A potential slider main sliding direction;

6. A pile-nail combined structure;

7. a main nail;

8. Auxiliary nailing;

9. A left wing nail;

10. a right wing nail;

11. A connecting beam;

12. A sand cushion layer;

13. an undisturbed soil layer;

14. a tubular pile;

15. A pile cap;

16. A skeleton;

17. A tubular pile body;

18. Pile ends of the pipe piles;

19. pile walls of the pipe piles;

20. and a diaphragm plate.

Detailed Description

The invention is further described below in connection with specific preferred embodiments, but it is not intended to limit the scope of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described according to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

As shown in fig. 1 to 3, an embodiment of a slope reinforcement structure for rapid treatment of existing slope collapse according to the present invention includes:

At least one row of pile pin combined structures 6 are continuously arranged at the lower part of the potential sliding body 4 of the side slope and at the position close to the toe of the side slope;

The pile nail combined structure 6 comprises a main nail 7, an auxiliary nail 8, a left wing nail 9 and a right wing nail 10 which are embedded in a side slope stabilized soil layer in a Y shape, wherein the main nail 7 is positioned between the auxiliary nail 8, the left wing nail 9 and the right wing nail 10, and the main nail 7 is connected with the auxiliary nail 8, the left wing nail 9 and the right wing nail 10 through reinforced concrete connecting beams 11 respectively. The left wing nails 9 and the right wing nails 10 are symmetrically arranged on two sides of the main nails 7, and a connecting beam 11 connecting the main nails 7 and the left wing nails 9 and a connecting beam 11 connecting the main nails 7 and the right wing nails 10 form a V-shaped included angle of 60-120 degrees, and the V-shaped included angle is arranged facing the slope potential sliding body 4. The connecting beam 11 between the main nails 7 and the auxiliary nails 8 is parallel to the main sliding direction 5 of the potential sliding body of the side slope, so that the main nails 7 and the auxiliary nails 8 of each pile nail combined structure 6 integrally form a double-row pile structure;

the stable soil layer is sequentially paved with a sand cushion layer 12 for drainage and an undisturbed soil layer 13.

In order to fully exert the anti-sliding effect of the stake on the side slope potential sliding body 4, the length of the stake which is embedded in the stable soil layer is not less than 1/2 of the stake length.

As shown in fig. 4 to 9, the stake includes a precast pile 14 and a framework 16 nested within the precast pile 14, and the precast pile 14 and the framework 16 are integrally cast with concrete on a side slope site.

The precast tubular pile 14 is a square or round hollow steel pipe pile, and the tubular pile end 18 of the precast tubular pile 14 is a solid cone. A plurality of diaphragm plates 20 are sequentially arranged on the inner wall of the prefabricated pipe pile 14 along the height direction of the pipe pile. The pile top of the precast pile 14 is provided with a pile cap 15.

The framework 16 comprises a plurality of solid rods which are the same in length with the pile body (the pile body is the height sum of the pile body 17 and the square component), the top of each solid rod is connected with a U-shaped component, and each U-shaped component comprises a square component with a hollow middle part and two baffles which are oppositely arranged on the top surface of the square component. When the framework 16 is nested in the prefabricated pipe pile 14, the square component is arranged at the top of the prefabricated pipe pile 14, and the two baffles are sequentially arranged in the main sliding direction 5 of the slope potential sliding body.

To maintain consistent overall stake length strength, the hollow cross section of the square members is consistent with the hollow cross section of the precast tubular stake 14 and the minimum thickness of the square members is consistent with the thickness of the stake walls 19 of the precast tubular stake 14.

To facilitate the placement of the sand bed 12 and drain pipes, the height of the square members is the same as the height of the sand bed 12.

The height of the baffle is consistent with the height of the connecting beam. In this way, the prefabricated pipe pile 14 and the connecting beam 11 can be connected into a whole at the node of the prefabricated pipe pile through the baffle plate, and the baffle plate can be used as a template when the connecting beam 11 is poured.

In order to verify the reinforcing effect of the slope reinforcing structure for rapidly treating existing slope collapse, the inventor performs the following tests:

A residual soil slope with a slope height of about 40 meters and a slope angle of about 35 degrees is selected, and shallow slump is generated on the slope under the action of artificial disturbance destruction and long-time rainfall. In order to prevent the instability range of the side slope from further expanding and ensure the life and property safety of people and normal traffic operation in the sliding damage range of the side slope, the side slope is reinforced and treated. The slope reinforcement treatment should be ensured to be effective and to ensure that the construction disturbance of the reinforcement treatment is within a reasonable range without causing the slope to be unstable again. Therefore, the slope reinforcement structure for rapidly treating the existing slope collapse is adopted. The pile nail is driven into construction by hammering a small-sized prefabricated pipe pile, and the side slope is not required to be excavated greatly. Meanwhile, the pile and nail combined structure 6 approximates construction from the stable soil bodies at two sides of the slope potential sliding body 4 to the unstable soil bodies in the middle, and the pile nails finished at two sides can form constraint on the slope potential sliding body, so that safety guarantee is provided for construction at the unstable soil bodies in the middle. In addition, the prefabricated member construction can quickly form an effective anti-slip effect on the side slope, and an advantageous reinforcement system is constructed by utilizing the cooperation and row effect of the pile and nail combined structure 6, so that the construction disturbance of reinforcement treatment measures is controlled within a reasonable range.

The specific operation is as follows:

(1) According to the requirements of geotechnical engineering investigation Specification (GB 50021-2001), the geological, hydrogeological and stratum distribution conditions of the side slope are ascertained, and the potential sliding body range and size and the main sliding direction of the side slope are analyzed;

(2) According to the technical specification of construction side slope engineering (GB 50330-2013) on design of slide-resistant piles of side slopes, the pile-nail spacing is drawn out in combination with the pile-nail prefabricated pile size and construction requirements, then the specific position of a Y-shaped pile-nail type reinforcing structure (pile-nail combined structure 6) at the position of the slope toe is determined based on a side slope stability evaluation method recommended by the specification and the safety coefficient required to be met by side slope stability, and the required length of the pile nail embedded in a stable soil layer below a potential sliding body 4 is calculated;

(3) Gradually developing a Y-shaped pile nail type reinforcing structure from the stable soil bodies on the periphery of two sides of a slope potential sliding body to the middle of the potential sliding body, adopting a step-by-step construction mode (namely, completing a Y-shaped pile nail type reinforcing structure and then continuing to form a next Y-shaped pile nail type reinforcing structure), and arranging piles according to a pile nail construction process, namely, as shown in figure 10, locally excavating, positioning the piles, hammering the piles, placing a nested skeleton in the piles, applying sand cushion layers and slope drainage pipes, pouring concrete piles and connecting beams, and backfilling original soil;

(4) The discontinuous position of the connecting beam (namely a construction joint formed by discontinuous pouring of the connecting beam concrete) in the Y-shaped pile nail type reinforcing structure is reserved in the pile nails, and the lap joint steel bars are reserved, and then the next pile nail construction is continued until the construction of the joint row Y-shaped pile nail type reinforcing structure is completed;

(5) After the construction of the row 'Y' -shaped pile nail type reinforcing structure is completed, displacement monitoring points are arranged on the side slope and the piles, the change of the displacement of the side slope after the reinforcement is continuously observed, the stability of the side slope is judged, and the effectiveness and the reliability of the reinforcement of the 'Y' -shaped pile nail type structure are evaluated.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.

Claims (7)

1. A side slope reinforcement structure for existing side slope slump is fast to be handled, includes side slope, its characterized in that: at least one row of pile pin combined structures are continuously arranged at the lower part of the potential sliding body of the side slope and at the position close to the toe of the side slope;

The pile nail combined structure comprises a main nail, an auxiliary nail, a left wing nail and a right wing nail which are embedded in a side slope stabilized soil layer in a Y shape, wherein the main nail is positioned among the auxiliary nail, the left wing nail and the right wing nail are symmetrically arranged at two sides of the main nail, the main nail is connected with the auxiliary nail, the left wing nail and the right wing nail through reinforced concrete connecting beams respectively, a V-shaped included angle of 60-120 degrees is formed between the connecting beams between the main nail and the left wing nail and the connecting beams between the main nail and the right wing nail, and the V-shaped included angle is arranged facing the side slope potential sliding body, lian Liangping between the main nail and the auxiliary nail is arranged in the main sliding direction of the side slope potential sliding body, so that the main nail and the auxiliary nail of each pile nail combined structure integrally form a double-row pile structure;

The pile nail comprises a prefabricated pipe pile and a framework nested in the prefabricated pipe pile, the framework comprises a plurality of solid rods which are the same in length as the pile body, the top of each solid rod is connected with a U-shaped part, each U-shaped part comprises a square part with a hollow middle part and two baffles which are oppositely arranged on the top surface of the square part, when the framework is nested in the prefabricated pipe pile, the square part is arranged on the top of the prefabricated pipe pile, the two baffles are sequentially arranged in the main sliding direction of the potential sliding body of the side slope, and the prefabricated pipe pile and the framework are integrally cast by concrete on the side slope site;

Sequentially paving a sand cushion layer and an undisturbed soil layer on the stable soil layer;

The length of the pile nails embedded in the stable soil layer is not less than 1/2 of the pile length.

2. The slope reinforcement structure for rapid existing slope collapse treatment according to claim 1, wherein the precast tubular pile is a square or round hollow steel pipe pile, and the pile end of the precast tubular pile is a solid cone.

3. The slope reinforcement structure for rapidly disposing existing slope slump according to claim 2, wherein a plurality of diaphragm plates are sequentially arranged on the inner wall of the prefabricated pipe pile along the height direction of the pipe pile.

4. The slope reinforcement structure for rapid existing slope collapse treatment according to claim 2, wherein the pile top of the precast tubular pile is provided with a pile cap.

5. The slope reinforcement structure for rapid existing slope collapse treatment according to claim 1, wherein the hollow section of the square member is identical to the hollow section of the precast tubular pile, and the minimum thickness of the square member is identical to the wall thickness of the precast tubular pile.

6. The slope reinforcement structure for rapid existing slope slump treatment according to claim 1, wherein the height of the square member is the same as the height of the sand mat layer, and the height of the baffle plate is identical to the height of the connecting beam.

7. A slope reinforcement construction method for rapidly treating existing slope collapse is characterized by comprising the following steps:

(1) According to the requirements of geotechnical engineering investigation Specification, the geological, hydrogeological and stratum distribution conditions of the side slope are ascertained, and the possible range and size and the main sliding direction of the potential sliding body of the side slope are analyzed;

(2) According to the design rule of the side slope anti-slide pile of the building side slope engineering technical specification, combining the size of the pile nails prefabricated pipe pile and the construction requirement, planning the distance between the pile nails, determining the specific position of the pile nails at the toe of the side slope based on the side slope stability evaluation method recommended by the specification and the safety coefficient required to be met by the side slope stability, and calculating the length of the pile nails embedded into a stable soil layer below a side slope potential sliding body;

(3) Gradually carrying out construction of the side slope reinforcing structure according to any one of claims 1-6 from the stable soil bodies around two sides of the side slope potential sliding body to the middle part of the potential sliding body, adopting a pile nail combined structure step-by-step construction mode, and arranging all piles according to the sequence of partially excavating, positioning the piles, hammering and driving the piles, putting the embedded skeleton in the piles, constructing a sand cushion layer and a side slope drain pipe, pouring concrete piles and a connecting beam, backfilling original soil, wherein in the process, the discontinuous part of the connecting beam is reserved in square parts of the piles, overlapping steel bars are reserved, and then the next pile nail construction is continued until the construction of the pile nail combined structure of the connecting row is completed;

(4) And displacement monitoring points are arranged on the side slope and the pile nails, the change of the side slope displacement after reinforcement is continuously observed, and the stability condition of the side slope is judged, and the effectiveness and the reliability of pile nail combined structure reinforcement are evaluated.