CN115627781A - Slope reinforcement structure for rapidly treating existing slope collapse and construction method - Google Patents

Abstract

The invention discloses a slope reinforcement structure and a construction method for rapidly treating the landslide of an existing slope, wherein at least one row of dowel combination structures are continuously arranged at the lower part of a potential sliding body of the slope and close to a slope toe; the pile nail composite structure comprises a main nail, an auxiliary nail, a left wing nail and a right wing nail which are embedded and fixed in a slope stabilizing soil layer in a Y shape, 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, 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 a slope potential sliding body, and the connecting beams between the main nail and the auxiliary nail are arranged in parallel to the main sliding direction of the slope potential sliding body, so that the main nail and the auxiliary nail of each pile nail composite structure form a double-row pile structure integrally; the pile nails comprise precast tubular piles and frameworks which are nested in the precast tubular piles, and the precast tubular piles and the frameworks 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 a slope collapse reinforcement structure, in particular to a slope reinforcement structure and a construction method for quickly treating slope collapse.

Background

The occurrence of the side slope collapse not only can cause the loss of lives and properties of people, but also seriously hinders the safe operation of traffic and destroys the natural environment.

The slope collapse is related to natural factors and also related to human behaviors, for example, rainfall infiltration in the natural factors can cause unsmooth drainage of the slope, and the original balance of the slope is easily disturbed by construction of a building in the human behaviors. The mechanism of slope slide collapse caused by these natural factors and human behaviors is to increase the slide-down capability of the slope on one hand and weaken the slide-resisting capability of the slope on the other hand. Accordingly, to improve the stability of the slope, the slope slip force is reduced and the slope slip resistance is improved accordingly.

The currently adopted measures for improving the slope stability include slope cutting, anti-slide pile reinforcement and prestressed anchor cable frame beam system reinforcement. For slope cutting, the purpose of reducing the downward sliding force of the slope is achieved by reducing the slope height and slowing down the slope, and thus the stable state of the slope is maintained. However, the slope cutting measures require large excavation of the original slope by manpower or machinery, which changes the original slope topography and destroys the local ecological environment. In addition, improper construction behavior under construction disturbance during slope cutting may cause local collapse of the excavated slope, thereby causing construction safety accidents. For the anti-slide pile reinforcement and the prestressed anchor cable frame beam system reinforcement, the anti-slide capability of the side slope is improved by applying artificial structures to stop the side slope from sliding downwards. However, both the slide-resistant piles and the prestressed anchor cable frame beam systems need to be excavated at present, a large amount of labor or machinery needs to be configured to complete the construction, and the construction time required for forming effective protection on the side slopes is long. Therefore, the reinforcing measures of the anti-slide pile or prestressed anchor cable frame beam system are not suitable for quickly treating the side slope which has slide collapse or potential slide collapse, and meanwhile, the construction cost for reinforcing the anti-slide pile and the prestressed anchor cable frame beam system is high due to the large manpower and material resource requirements, and unstable factors are brought to the construction safety.

Along with the acceleration of the pace of infrastructure construction in China, the disturbance of human behaviors to the original side slope is more, and the problem of side slope collapse caused by the disturbance also becomes more serious. In addition, with the change of global environmental climate, the extreme severe weather is frequent, and the landslide of the slope in the mountainous area is further aggravated. That is, the situation of slope treatment faced at present is very severe, and especially the rapid treatment of sudden collapsed or potential collapsed slopes becomes an urgent need.

Disclosure of Invention

The invention aims to solve the technical problem that the existing landslide or potential landslide treatment method is not enough, and provides a slope reinforcement structure and a construction method which are easy to implement, rapid and convenient and used for rapidly treating the existing slope landslide.

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

a side slope reinforcement structure for rapidly treating existing side slope collapse comprises a side slope, wherein at least one row of pile nail combination structures are continuously arranged at the position, close to a slope toe, of the lower portion of a potential sliding body 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 and fixed in a slope stabilizing soil layer in a Y shape, 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 connecting beam between the main nail and the left wing nail and a connecting beam between the main nail and the right wing nail form a V-shaped included angle and are arranged facing the slope potential sliding body, and the connecting beam between the main nail and the auxiliary nail is arranged in parallel to the main sliding direction of the slope potential sliding body, so that the main nail and the auxiliary nail of each pile nail combined structure form a double-row pile structure integrally;

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

and a sand cushion layer and an original 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 degrees and 120 degrees.

Preferably, the length of the peg embedded in the stabilization soil layer is not less than 1/2 of the length of the peg.

Preferably, 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.

Preferably, a plurality of transverse partition plates are sequentially arranged on the inner wall of the precast tubular pile along the height direction of the tubular pile.

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

Preferably, the skeleton includes many solid member with the same length of pile body, U type parts are connected at the top of solid member, U type parts include the hollow square component in middle part and two relative baffles that set up at the square component top surface, the skeleton nestification is in when the precast tubular pile is interior, square component arranges in precast tubular pile's top, two the baffle is in set gradually on the slope dives slider owner slip direction.

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

Preferably, the height of the square part is the same as that of the sand cushion layer, and the height of the baffle is the same as that 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 regulations, the side slope geology, hydrogeology and stratum distribution conditions are explored, and the possible range and size of potential sliding bodies of the side slope and the main sliding direction are analyzed;

(2) According to the design rule of slope slide-resistant piles according to the technical Specifications of building slope engineering, pile nail prefabricated pipe pile dimensions and construction requirements are combined, pile nail spacing is planned, then, based on a slope stability evaluation method recommended by the Specifications and the safety factor required to be met by slope stability, the specific position of a pile nail at a slope foot is determined, and the length of the pile nail embedded in a stable soil layer below a potential slide body of the slope is calculated;

(3) The pile nail combination structure of any one of claims 1-9 is gradually constructed from the stable soil bodies on the two sides of the side slope potential sliding body to the middle of the potential sliding body, a pile nail combination structure is gradually constructed, and the pile nails are arranged in the sequence of local excavation → pipe pile positioning → hammering and driving the pipe pile → putting the pipe pile into a nested framework → constructing a sand cushion layer and a side slope drain pipe → pouring a concrete pipe pile and a connecting beam → backfilling undisturbed soil, in the process, the discontinuous part of the connecting beam is left in the square part of the pile nail, and lap joint reinforcing steel bars are reserved, and then the construction of the next pile nail is continued until the pile nail combination structure of the row is completely constructed;

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

The invention has the structural characteristics that:

(1) The pile nail type reinforcing structure adopts Y-shaped arrangement and consists of a main nail, an auxiliary nail, a left wing nail and a right wing nail, all the pile nails are connected by utilizing a reinforced concrete connecting beam to form a whole, and the main nail, the left wing nail and the right wing nail form a V shape, so that the potential slide body of the side slope can be reinforced in a larger range by exerting the synergy and the pushing action of the pile nails, the zoning treatment of the potential slide body is realized, and the main nail and the auxiliary nail form double rows of piles, so that the anti-sliding action and the stability of the pile nails are greatly increased;

(2) The Y-shaped pile nail type reinforcing structure is arranged at the lower part of a potential sliding body of the side slope and close to the position of the slope toe, and can play the best reinforcing role of the Y-shaped pile nail type structure;

(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 a V-shaped included angle formed by the main nail and the auxiliary 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 nail is embedded and fixed in a stable soil layer at the lower part of the potential sliding body, the embedding length is not less than 1/2 of the pile length, and the anti-sliding effect of the pile nail on the potential sliding body is fully exerted;

(5) Under the self-anti-slip effect and the Y-shaped layout synergistic effect of the pile nail, the size of the pile nail does not need to be overlarge, and the pile nail can be designed into a small or miniature pile so as to facilitate the field mechanical construction;

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

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

(8) The thickness of the pile wall of the prefabricated pipe pile in the pile nail meets the strength requirement required by the hammering and driving construction of the pile body, and the transverse partition plate is arranged in the pipe pile, so that the damage caused by bending of the pile body when the pipe pile is driven is avoided;

(9) According to the pile nail, the precast tubular pile is hammered into a soil body through hammering, when the pile nail is hammered for construction, the pile top of the precast tubular pile is provided with the pile cap, the pile cap can avoid strength damage caused by direct action of hammering on the pile nail, and the action of the heavy hammer is uniformly dispersed to the pile body and the pile end to prevent the tubular pile from being tilted;

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

(11) In the internal nested framework of the precast tubular pile, the middle hollow part of the square part is consistent with the hollow part inside the precast tubular pile in shape, the thickness (square tubular pile) or the thinnest thickness (round tubular pile) is consistent with the thickness of the tubular pile, and the height is the same as the height of a drainage sand cushion layer applied in later period, so that the precast tubular pile and a connecting beam at the top of the pile can be conveniently integrated after concrete is poured, and the construction of the drainage sand cushion layer between the pile nails cannot conflict with the concrete pouring of the tubular pile and the connecting beam at the top of the pile;

(12) The height of the front baffle and the rear baffle which are arranged in the framework is consistent with the height of the connecting beam, on one hand, the prefabricated pipe pile and the connecting beam are connected into a whole at the node of the connecting beam by the baffles, and on the other hand, the baffles can also be used as templates when the connecting beam is poured;

(13) The pile nail construction process of the invention is characterized in that: locally excavating a pile nail arrangement position to a designed position of a pile top of the pipe pile → positioning the pipe pile and sleeving a pile cap on the pile top → hammering and driving the pipe pile to a designed depth → taking down the pile cap and putting the pile into a nested framework in the pipe pile → constructing a drainage sand cushion layer between the pile nails → constructing a beam connecting construction template and binding beam connecting reinforcing steel bars → pouring concrete to integrate the pipe pile and the beam connecting construction template → dismantling the beam connecting construction template and backfilling the original state to the initial elevation. The construction is completed according to the construction process, the anti-sliding effect of the pile nails on the potential slide body of the side slope can be quickly 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:

the invention develops the Y-shaped pile type reinforcing structure aiming at the rapid treatment of slumped or potential slumped slopes, systematically provides the Y-shaped layout and pile construction procedures of the pile type reinforcing structure, forms a set of construction methods of the Y-shaped pile type reinforcing structure, namely the Y-shaped reinforcing structure, and is safe and efficient, and achieves the purpose that the single small or micro prefabricated pile forms a Y-shaped whole body to exert the synergistic effect of the Y-shaped whole body to form the maximum anti-slip effect on the slopes.

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

The structure and the method are easy to implement, quick, convenient, safe, reliable, low in cost, high in efficiency, low-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 used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the slope reinforcement structure of the present invention.

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

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

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>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 a cross-sectional view E-E of the peg of the present invention.

Fig. 10 is a process diagram of pile nail construction according to an embodiment of the present invention, in which a is a partial excavation of a pile nail arrangement; b, positioning and hammering the tubular pile; c, putting a framework into the tubular pile; d is a sand cushion layer (containing a drain pipe) for drainage; e, pouring concrete; f is backfilled undisturbed soil.

Illustration of the drawings:

1. a slope surface;

2. a sloping bottom surface;

3. a sloping top surface;

4. a potential sliding body;

5. a potential slide body main sliding direction;

6. a dowel pin combination structure;

7. a main nail;

8. auxiliary nails are arranged;

9. a left wing nail;

10. a right wing nail;

11. connecting the beams;

12. a sand cushion layer;

13. an undisturbed soil layer;

14. a tubular pile;

15. pile caps;

16. a framework;

17. a pipe pile body;

18. a pipe pile end;

19. pile wall of the tubular pile;

20. a diaphragm plate.

Detailed Description

The invention is further described below with reference to specific preferred examples, without thereby limiting the scope of protection 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 with reference 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 the slope reinforcement structure for rapidly treating existing slope landslide according to the present invention includes:

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

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

and a sand cushion 12 for drainage and an undisturbed soil layer 13 are laid on the stabilized soil layer in sequence.

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

As shown in fig. 4-9, the stake includes a precast tubular pile 14 and a framework 16 nested in the precast tubular pile 14, and the precast tubular pile 14 and the framework 16 are cast in one piece with concrete at the side slope site.

Precast tubular pile 14 is square or circular shape hollow steel pipe pile, just precast tubular pile 14's tubular pile stake end 18 is solid cone. And a plurality of transverse partition plates 20 are sequentially arranged on the inner wall of the precast tubular pile 14 along the height direction of the tubular pile. The pile top of the precast tubular pile 14 is provided with a pile cap 15.

Skeleton 16 includes many and pile body (here pile body is the height sum of tubular pile body 17 and square component) with the solid member of length, U type part is connected at the top of solid member, U type part includes that the middle part is hollow square component and two relative baffles that set up at square component top surface. When skeleton 16 nestification is in precast tubular pile 14, square part is arranged in precast tubular pile 14's top, two the baffle is in the potential sliding body owner of slope slides and set gradually in the direction 5.

In order to keep the strength of the pile nails in the same full length, the hollow section of the square component is the same as that of the precast tubular pile 14, and the minimum thickness of the square component is the same as that of the tubular pile wall 19 of the precast tubular pile 14.

In order to facilitate the arrangement of the sand cushion layer 12 and the drain pipe, the height of the square component is the same as that of the sand cushion layer 12.

The height of the baffle is consistent with that of the connecting beam. Therefore, the precast tubular piles 14 and the connecting beams 11 can be connected into a whole at the joints of the precast tubular piles and the connecting beams 11 through the baffles, and the baffles can be used as templates when the connecting beams 11 are poured.

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

selecting a residual soil side slope with the slope height of about 40 meters and the slope angle of about 35 degrees, wherein the side slope has shallow slide collapse under the action of artificial disturbance and damage and long-time rainfall. In order to prevent the slope instability range from further expanding and ensure the safety of people's lives and properties and the normal operation of traffic in the slope sliding damage range, the slope is subjected to reinforcement treatment. The slope reinforcement treatment measures should be guaranteed to be effective, and construction disturbance of the reinforcement treatment measures can be guaranteed to be within a reasonable range without causing slope instability again. Therefore, the slope reinforcement structure for quickly treating the existing slope collapse is adopted. The pile nail adopts small-size precast tubular pile hammering to squeeze into the construction, need not to carry out heavy excavation to the side slope. Meanwhile, the pile nail composite structure 6 approaches construction from the stable soil bodies on two sides of the side slope potential sliding body 4 to the unstable soil body in the middle, and the finished pile nails on two sides can form restraint on the side slope potential sliding body, so that safety guarantee is provided for construction of the unstable soil body in the middle. In addition, the prefabricated member construction can quickly form an effective anti-slip effect on the slope, and a favorable reinforcing system is constructed by utilizing the cooperation and row effect of the pile nail combined structure 6, so that the construction disturbance of the reinforcing treatment measures is controlled within a reasonable range.

The specific operation is as follows:

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

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

(3) Gradually developing the construction of a Y-shaped pile nail type reinforcing structure from the stable soil bodies on the two sides of the side slope potential sliding body to the middle of the potential sliding body, adopting a gradual construction mode (namely completing one Y-shaped pile nail type reinforcing structure and then continuing the next Y-shaped pile nail type reinforcing structure), and arranging piles according to the pile nail construction process, namely as shown in figure 10, locally excavating → positioning and hammering a pipe pile → driving the pipe pile → placing a pipe pile internally nested framework → constructing a sand cushion layer and a side slope drainage pipe → pouring a concrete pipe pile and a connecting beam → backfilling original state soil;

(4) The broken part of the connecting beams (namely a construction joint formed by discontinuously pouring the concrete of the connecting beams) in the Y-shaped pile nail type reinforcing structure is kept in the pile nails, lap-jointed steel bars are reserved, and then the construction of the next pile nail is continued until the construction of the Y-shaped pile nail type reinforcing structure in the row is finished;

(5) After the Y-shaped pile nail type reinforcing structure in the row is constructed, displacement monitoring points are arranged on the side slope and the pile nails, the displacement change 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 Y-shaped pile nail type reinforcing structure are evaluated.

The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (10)

1. The utility model provides a side slope reinforced structure for existing side slope collapse is dealt with fast, includes the side slope, its characterized in that: continuously arranging at least one row of pile nail combination structures 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 main nails, auxiliary nails, left wing nails and right wing nails which are embedded in a slope stabilized soil layer in a Y shape, the main nails are positioned among the auxiliary nails, the left wing nails and the right wing nails, the main nails are respectively connected with the auxiliary nails, the left wing nails and the right wing nails through reinforced concrete coupling beams, coupling beams between the main nails and the left wing nails form V-shaped included angles with coupling beams between the main nails and the right wing nails and are arranged facing the slope potential sliding body, the coupling beams between the main nails and the auxiliary nails are arranged in parallel to the main sliding direction of the slope potential sliding body, so that the main nails and the auxiliary nails of each pile nail combined structure are integrally formed into a double-row pile structure;

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

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

2. The slope reinforcement structure for rapidly treating existing slope landslide of claim 1, wherein the left wing nail and the right wing nail are symmetrically arranged and the V-shaped included angle is between 60 ° 0 and 120 °.

3. The slope reinforcement structure for the rapid treatment of existing slope landslides of claim 1, wherein the length of the stakes embedded in the stabilized soil layer is not less than 1/2 of the stake length.

4. The slope reinforcement structure for rapidly treating existing slope landslide of claim 1, wherein the precast tubular pile is a square or circular hollow steel tubular pile and a pile tip of the precast tubular pile is a solid cone.

5. The slope reinforcement structure for rapidly treating existing slope landslide according to claim 4, wherein a plurality of transverse partition plates are sequentially arranged on the inner wall of the precast tubular pile along the height direction of the tubular pile.

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

7. The slope reinforcement structure for rapidly treating landslide of an existing slope according to claim 1, wherein the framework comprises a plurality of solid rod pieces which are as long as the pile body, the top of each solid rod piece is connected with a U-shaped part, each U-shaped part comprises a square part which is hollow in the middle and two baffles which are oppositely arranged on the top surface of the square part, when the framework is nested in the precast pipe pile, the square part is arranged on the top of the precast pipe pile, and the two baffles are sequentially arranged in the main sliding direction of the slope submerged sliding body.

8. The slope reinforcement structure for rapidly treating an existing slope collapse according to claim 7, wherein the hollow section of the square part is identical to that of the precast tubular pile, and the minimum thickness of the square part is identical to the thickness of the pile wall of the precast tubular pile.

9. The slope reinforcement structure for rapid treatment of existing slope landslide of claim 7, wherein the height of the square part is the same as the height of the sand cushion layer, and the height of the barrier is the same as the height of the connecting beam.

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

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

(2) According to the design rule of the slide-resistant piles on the side slope in the building side slope engineering technical specification, the pile nail spacing is drawn up by combining the size of the pile nail prefabricated pipe pile and the construction requirement, then, the specific position of the pile nail at the slope toe is determined based on the side slope stability evaluation method recommended by the specification and the safety factor required to be met by the side slope stability, and the length of the pile nail embedded in a stable soil layer below a potential sliding body of the side slope is calculated;

(3) The pile nail combination structure of any one of claims 1-9 is gradually constructed from the stable soil bodies on the two sides of the side slope potential sliding body to the middle of the potential sliding body, a pile nail combination structure is gradually constructed, and the pile nails are arranged in the sequence of local excavation → pipe pile positioning → hammering and driving the pipe pile → putting the pipe pile into a nested framework → constructing a sand cushion layer and a side slope drain pipe → pouring a concrete pipe pile and a connecting beam → backfilling undisturbed soil, in the process, the discontinuous part of the connecting beam is left in the square part of the pile nail, and lap joint reinforcing steel bars are reserved, and then the construction of the next pile nail is continued until the pile nail combination structure of the row is completely constructed;

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

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