CN110453699B - Drainage slide-resistant pile structure of 'rice' -shaped pile core and construction method thereof - Google Patents
Drainage slide-resistant pile structure of 'rice' -shaped pile core and construction method thereof Download PDFInfo
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- CN110453699B CN110453699B CN201910783198.8A CN201910783198A CN110453699B CN 110453699 B CN110453699 B CN 110453699B CN 201910783198 A CN201910783198 A CN 201910783198A CN 110453699 B CN110453699 B CN 110453699B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
Abstract
The invention relates to a drainage slide-resistant pile structure of a'm' -shaped pile core and a construction method thereof, wherein the structure comprises a square solid pile bottom at the lower part, a square outer pile wall at the upper part and a'm' -shaped inner pile core at the upper part, and the three are connected into a whole by adopting a reinforcement cage; the bottom of the lower square solid pile penetrates through the sliding surface and penetrates into the bedrock, and a plurality of water drainage holes are formed in the lower square solid pile; a plurality of flow guide holes are formed in the upper square outer pile wall; an upper meter-shaped inner pile core is arranged in the upper square outer pile wall, and an area between the upper square outer pile wall and the upper meter-shaped inner pile core is an upper pile body water collecting space; a plurality of layers of drainage cushion layers are laid at the corresponding positions of the bottom of the upper pile body water collecting space and the upper part of the bottom of the lower square solid pile; the water drainage hole and the flow guide hole are communicated with the corresponding upper pile body water collecting space; filling permeable aggregates in the upper pile body water collecting space, the water drainage holes and the flow guide holes; the anti-slide pile is good in integrity and bending resistance and shearing resistance, and can realize real-time drainage.
Description
Technical Field
The invention belongs to the field of geological disaster prevention and control, and particularly relates to a drainage slide-resistant pile structure of a 'meter' -shaped pile core and a construction method, which are suitable for hydrodynamic slope reinforcement technology influenced by reservoir water, rainfall and other hydrological factors.
Background
Landslide is essentially a process of gradual and dynamic destruction of a slope body of the slope, and the influence factors of the landslide are characterized by complexity and diversity and are mainly comprehensively influenced by aspects of landform, stratigraphic lithology, geological structure, rainfall, engineering construction disturbance, time and the like, so that landslide treatment engineering is often a complex system engineering. At present, landslide is treated by a plurality of methods, such as retaining walls, anchor rods, slope cutting, load reduction and back pressure, anti-slide piles and the like. The anti-slide pile has the advantages of flexible arrangement, simple construction, small disturbance to landslide and the like, and is widely concerned by the engineering and academic circles.
Initially, adverse influence factors of groundwater are often ignored when analyzing and checking landslide stability, and it is considered that drainage is not necessary to be carefully arranged, and even whether drainage is present or not is considered inconsequential. In fact, the anti-slide pile improves the anti-slide stability of the landslide body and reduces the seepage passage of water in the landslide body, thereby increasing the potential landslide danger to a certain extent. That is to say, the anti-slide pile has the effect of hindering the seepage to the gliding mass seepage, has raised the gliding mass water level, has increased the gliding mass dead weight to make the cohesion and the internal friction angle of gliding mass and sliding bed descend, landslide stability descends, and gliding force increases. Based on the method, the drainage of the landslide body and the drainage arrangement of the landslide body are well made, which plays an important role in ensuring the stability of the landslide body, so that the drainage anti-slide pile is produced at the right moment. The drainage slide-resistant pile can be divided into a tubular pile and a square pile in view of shape alone. The outer surface of the pipe pile is smooth and round, and particularly when the pipe pile is used as a friction pile, the friction force with soil is small, and the pipe pile with large outer diameter has to be used in many projects to increase the project cost. In addition, the thin-wall tubular pile has poor bending resistance, particularly poor shearing resistance and tensile resistance of the pile body, and brings great potential safety hazard to landslide control. For example, the 'drainage slide-resistant pile' with the application number of 201220581962.7 and the 'drainage slide-resistant pile' with the application number of 201610832857.9 on the earth slope have the defect of poor bending resistance. Compared with the performance of the tubular pile, the square pile has large outer surface area and is square, which means that the square pile can obtain larger bearing capacity than the tubular pile under the same geological conditions. In addition, the shear resistance of the square pile is calculated theoretically and can be 2-3 times of that of the same tubular pile, meanwhile, the construction damage rate is low, the impact resistance is high, a non-welded quick connector can be easily developed, all-weather construction can be truly achieved, and construction can be fast. Therefore, a plurality of square drainage anti-slide piles are developed in a large number. Some patents, however, seek drainage effects and ignore their bending resistance. For example, in 201510252389.3 entitled drainage slide-resistant pile with automatic water level adjustment and construction method thereof, rectangular hollow pile body is provided for the purpose of automatic water level adjustment, which results in great reduction of bending resistance. In addition, the application number is 201810078596.5 hollow drainage anchor-pulling slide-resistant pile and a construction method thereof, the system consists of the slide-resistant pile, an anchor-pulling device, a seepage well and a water pumping system, the structure is very complex, and the construction steps are as high as 33 steps, so that the construction is very complicated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a drainage slide-resistant pile structure with a'm' -shaped pile core and a construction method, wherein the cross section of the slide-resistant pile is square, and a reinforcement cage is adopted to connect a lower square solid pile bottom, an upper square outer pile wall and an upper'm' -shaped inner pile core into a whole, so that the integrity and the bending resistance and the shearing resistance of the slide-resistant pile are greatly improved. The water collecting space of the upper pile body, the flow guide holes and the water drainage holes are filled with the pervious aggregate, so that the function of water drainage is realized. In addition, the use of the geomembrane and the drainage cushion layer perfectly overcomes the risk of drainage failure of the slide-resistant pile in the use process. In addition, the drainage slide-resistant pile can be cast in place and prefabricated, and is simple in construction process and flexible to operate.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a drainage slide-resistant pile structure of a 'meter' -shaped pile core is characterized by comprising a square solid pile bottom at the lower part, a square outer pile wall at the upper part, a 'meter' -shaped inner pile core at the upper part, a pile body water collecting space at the upper part, a permeable aggregate and a drainage cushion layer; the bottom of the lower square solid pile penetrates through the sliding surface and goes deep into the bedrock, and a plurality of water drainage holes are formed in the bottom of the lower square solid pile; a plurality of flow guide holes are formed in the upper square outer pile wall;
an upper meter-shaped inner pile core is arranged in the upper square outer pile wall, and an area between the upper square outer pile wall and the upper meter-shaped inner pile core is an upper pile body water collecting space;
a plurality of layers of drainage cushion layers are laid at the corresponding positions of the bottom of the upper pile body water collecting space and the upper part of the bottom of the lower square solid pile;
the drainage hole and the flow guide hole are communicated with the corresponding upper pile body water collecting space; filling permeable aggregates in the upper pile body water collecting space, the water drainage holes and the flow guide holes;
a steel reinforcement cage is adopted to connect the lower square solid pile bottom, the upper square outer pile wall and the upper square inner pile core into a whole, and the lower square solid pile bottom, the upper square outer pile wall and the upper square inner pile core are integrally poured.
The cross section of a drainage hole formed in the bottom of the lower square solid pile can be circular or square; the water drainage holes are used for draining water collected to the water collecting space of the upper pile body out of the slope body in real time;
the thickness d of the upper square outer pile wall is about 1/6 of the length l of the section of the pile body; and flow guide holes are uniformly distributed.
The wall thickness of the upper square outer pile core is 2/3 of the wall thickness of the upper square inner pile core.
The cross section of the upper pile body water collecting space is triangular, and permeable aggregate is filled in the upper pile body water collecting space.
The pervious aggregate is also filled in the drainage holes and the diversion holes; the pervious aggregate can be materials with moderate strength and water permeability, such as gravel or pervious stone.
The steel reinforcement cage comprises a rice-shaped steel reinforcement cage and a square steel reinforcement cage, wherein the rice-shaped steel reinforcement cage is positioned in an upper rice-shaped inner pile core, the square steel reinforcement cage is positioned in an upper square outer pile wall, the rice-shaped steel reinforcement cage and the square steel reinforcement cage downwards penetrate into the bottom of a lower square solid pile, and the rice-shaped steel reinforcement cage and the square steel reinforcement cage are welded into a whole. Thereby improving the anti-skid and anti-bending performance of the pile body.
The drainage cushion layer is positioned at the bottom of the upper pile body water collecting space and at the upper part of the lower square solid pile bottom and has a filtering function;
the geomembrane wraps the outer side of the pile body, so that impurities or fine particles in a slope body are prevented from flowing into the water collecting space of the upper pile body through the flow guide holes, and the drainage performance is reduced.
The invention also discloses a construction method of the drainage slide-resistant pile structure of the 'rice' -shaped pile core, which is characterized by comprising the following steps of: the construction method comprises the following specific steps:
s1 field investigation and indoor design: the engineering geological condition and the regional hydrogeological condition of a mountain are surveyed on site, the position of a potential sliding surface (belt) is captured, and the size, the pile hole depth and the embedding position of the slide-resistant pile are determined;
s2 prefabricating a reinforcement cage: manufacturing a'm' -shaped reinforcement cage (5) and a square reinforcement cage (11) in a welding mode, and finally, putting the'm' -shaped reinforcement cage (5) into the square reinforcement cage (11) to be welded to form a reinforcement cage whole;
s3, template preparation: processing and manufacturing a square outer template and a triangular inner template according to the size of the square pile;
s4 construction preparation: measuring and positioning the position where the slide-resistant pile needs to be embedded according to an indoor design result, and transporting a reinforcement cage, a cement material, a template and drilling equipment to a construction site;
s5 pile hole construction: excavating the pile hole to the designed depth according to the designed pile position and the size requirement of the pile hole, and performing wall protection treatment on the pile hole according to geological conditions;
s6, pouring the bottom of the square solid pile at the lower part: hoisting the whole reinforcement cage and the square outer template into the pile hole, pouring the bottom of the lower square solid pile to the designed height, and reserving a water drainage hole;
s7, pouring an upper square outer pile wall and an upper'm' -shaped inner pile core: hoisting the triangular inner template to a designed position, integrally pouring to form an upper square outer pile wall and an upper rice-shaped inner pile core, and reserving a flow guide hole in the upper square outer pile wall;
s8 aggregate filling: after all the steps are finished, the template is dismantled, the permeable aggregate is filled into the drainage hole, then the drainage cushion layer is laid, and the permeable aggregate is filled into the water collecting space of the upper pile body and the diversion hole;
s9 backfill tamping: and (3) wrapping the geotechnical filter membrane outside the pile body, backfilling the space between the pile body and the pile hole, tamping and covering a layer of clay on the pile top.
Compared with the prior art, the invention has the beneficial effects that:
1) the anti-slide pile structure adopts a main body form of the square pile, and the bearing capacity of the square pile is larger than that of a tubular pile under the same geological condition, so that engineering consumables can be saved and the construction speed can be increased;
2) the anti-slide pile structure adopts the square pile with the 'meter' -shaped pile core, inherits and develops the characteristic of low construction damage rate of the original concrete square pile, enables the pile body to be stressed more uniformly, and improves the impact resistance of the pile; meanwhile, the structure of the 'meter' -shaped pile core is completely symmetrical, and the construction is convenient.
3) The square steel reinforcement cage and the square steel reinforcement cage are adopted to tightly connect the square solid pile bottom at the lower part, the square outer pile wall at the upper part and the square inner pile core at the upper part together, so that the shearing resistance and the bending resistance of the pile body are greatly improved; the upper pile body water collecting space, the flow guide holes and the water drainage holes are matched for use, so that real-time drainage can be realized, and the drainage requirement of the slide-resistant pile is perfectly met.
4) The pile body disclosed by the invention is simple in structure, and can be cast in place and prefabricated. The construction method is mature, the working procedure is simple, and the construction quality is easy to control.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention provides the following drawings for illustration:
FIG. 1 is a schematic perspective view of a drainage slide-resistant pile with a "rice" shaped pile core according to the present invention;
FIG. 2 is a top view A-A of a drainage slide-resistant pile of a "rice" type pile core of the present invention;
FIG. 3 is a sectional view B-B of a drainage slide-resistant pile of a "rice" type pile core according to the present invention;
in the figure: 1. the foundation pile comprises a square solid pile bottom at the lower part, a square outer pile wall at the upper part, a square inner pile core at the upper part, a pile body water collecting space at the upper part, a square steel reinforcement cage at the upper part, a permeable aggregate at the upper part, a drainage cushion layer at the upper part, a drainage hole at the upper part, a water guide layer at the upper part, a drainage hole at the upper part.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1
The embodiment discloses a drainage slide-resistant pile structure of a 'meter' type pile core, which comprises a lower square solid pile bottom 1, an upper square outer pile wall 2, an upper 'meter' type inner pile core 3, an upper pile body water collecting space 4, a 'meter' type reinforcement cage 5, permeable aggregates 6, a drainage cushion layer 7, a geotechnical filter membrane 10 and a square reinforcement cage 11, as shown in fig. 1 and 2. The lower square solid pile bottom 1 penetrates through the sliding surface 13 and penetrates into the bedrock 12 to a certain depth, and a plurality of water drainage holes 8 are formed in the lower square solid pile bottom; a plurality of flow guide holes 9 are formed in the upper square outer pile wall 2; the water drainage holes 8 and the flow guide holes 9 are communicated with the corresponding upper pile body water collecting space 4; and the pervious aggregate 6 is filled in the upper pile body water collecting space 4, the water drainage hole 8 and the flow guide hole 9. A plurality of layers of drainage cushion layers 7 are laid at the bottom of the upper pile body water collecting space 4 and the upper part of the lower square solid pile bottom 1; a lower square solid pile bottom 1, an upper square outer pile wall 2 and an upper square inner pile core 3 are connected into a whole by adopting a reinforcement cage 5, and the upper square outer pile wall and the upper square inner pile core are connected with the lower square solid pile bottom into a whole by an integral pouring method.
The types and specifications of the pervious aggregates filled in the upper pile body water collecting space 4, the water drainage hole 8 and the flow guide hole 9 can be the same, and can also be adjusted according to actual requirements. The concrete number of the drainage holes 8 and the diversion holes 9 is determined according to actual requirements, and the size and the geological conditions of the pile are comprehensively considered, and the requirements of drainage, bending resistance and shearing resistance are considered.
As shown in fig. 2 and 3, the cross-sectional shape of the drain hole 8 formed in the lower square solid pile bottom 1 can be circular or square, and the drain hole can be communicated with a blind hole or a water guide hole through a connecting conduit; the water drainage holes 8 are used for draining water collected to the upper pile body water collection space 4 out of the slope body in real time;
as shown in fig. 1, the thickness d of the upper square outer pile wall 2 is about 1/6 of the section length l of the pile body; and the diversion holes 9 are uniformly distributed; the wall thickness of the upper square inner pile core is generally set to 2/3 of the wall thickness of the upper square outer pile. The depth of the lower square solid pile bottom 1 penetrating into the bedrock is generally 1.5-3 m, and the height of the lower square solid pile bottom 1 exposed out of the bedrock is 1/3-1/2 of the depth of the lower square solid pile bottom embedded into the bedrock. The height of the upper square outer pile wall is determined according to the thickness of the sliding body.
As shown in fig. 1, one end of each diversion hole 9 is communicated with the corresponding upper pile body water collecting space 4, and the diversion holes are used for converging water in a slope body to the upper pile body water collecting space 4 in real time;
as shown in fig. 1 and 2, the upper pile body water collecting space 4 has a triangular cross-sectional shape and is filled with a permeable aggregate 6;
as shown in fig. 1 and 3, the pervious aggregates 6 are also filled in the drainage holes 8 and the diversion holes 9; the pervious aggregate 6 can be rubble or pervious stone and other materials with moderate strength and water permeability;
as shown in fig. 1, 2 and 3, the upper "m" shaped inner pile core 3 is located inside the upper square outer pile wall 2, and the cross section shape is "m" shaped;
as shown in fig. 1, 2 and 3, the "m" -shaped reinforcement cage 5 is located in the upper "m" -shaped inner pile core 3 and penetrates downward into the lower square solid pile bottom, the square reinforcement cage 11 is located in the upper square outer pile wall and penetrates downward into the lower square solid pile bottom, and the upper "m" -shaped inner pile core 3, the lower square solid pile bottom and the upper square outer pile wall 2 are integrally connected by mutually welding the "m" -shaped reinforcement cage 5 and the square reinforcement cage 11, so that the anti-sliding and anti-bending performance of the pile body is improved;
as shown in fig. 1, the drainage cushion layer 7 is positioned at the bottom of the upper pile body water collecting space 4 and at the upper part of the lower square solid pile bottom 1, and has a filtering function; the area of drainage bed course corresponds unanimous with the area of upper portion pile body water-collecting space, and the area of laying of drainage bed course is less than the stake cross-section, can guarantee that square outer pile wall 2 in upper portion, square solid pile end 1 in lower part, 3 three of upper portion "rice" type inner pile core can pour and be a whole, improve the wholeness of friction pile structure.
As shown in fig. 1 and 3, the geomembrane 10 is wrapped on the outer side of the whole pile body to prevent impurities or fine particles in the slope body from flowing into the upper pile body water collecting space 4 through the diversion holes 9, thereby reducing the drainage performance.
Example 2
The construction method of the drainage slide-resistant pile structure of the 'meter' type pile core comprises the following steps:
s1 field investigation and indoor design: the engineering geological condition and the regional hydrogeological condition of a mountain are surveyed on site, the position of a potential sliding surface (belt) is captured, and the size, the pile hole depth and the embedding position of the slide-resistant pile are determined;
s2 prefabricating a reinforcement cage: manufacturing a square reinforcement cage 11, manufacturing a'm' -shaped reinforcement cage 5 by adopting a welding method, and finally, filling the'm' -shaped reinforcement cage 5 into the square reinforcement cage 11 to be welded to form a reinforcement cage whole body;
s3, template preparation: processing and manufacturing a square outer template and a triangular inner template according to the size of the square pile;
s4 construction preparation: measuring and positioning the position where the slide-resistant pile needs to be embedded according to the indoor design result of the step S1, and transporting a reinforcement cage, a cement material, a template, drilling equipment and the like to a construction site;
s5 pile hole construction: excavating the pile hole to the designed depth according to the designed pile position and the size requirement of the pile hole, and performing wall protection treatment on the pile hole according to geological conditions;
s6, pouring the square solid pile bottom 1 at the lower part: hoisting the whole reinforcement cage and the square outer template into the pile hole, pouring the lower square solid pile bottom 1 to the designed height and reserving a water drainage hole 8;
s7, pouring the upper square outer pile wall 2 and the upper'm' -shaped inner pile core 3: hoisting the triangular inner template to a designed position, integrally pouring to form an upper square outer pile wall 2 and an upper rice-shaped inner pile core 3, and reserving a flow guide hole 9 in the upper square outer pile wall 2;
s8 aggregate filling: after all the steps are finished, the template is removed, the permeable aggregate 6 is filled into the water drainage hole 8, then the drainage cushion layer 7 is laid, the position of the drainage cushion layer is just corresponding to the position of the upper pile body water collecting space 4 and can cover the area of the upper pile body water collecting space 4, the drainage cushion layer is made of permeable materials, and then the permeable aggregate 6 is filled into the upper pile body water collecting space 4 and the flow guide hole 9;
s9 backfill tamping: and (3) wrapping the geotechnical filter membrane 10 outside the pile body, backfilling the space between the pile body and the pile hole, and tamping.
Example 3
The construction method of the drainage slide-resistant pile structure of the 'meter' type pile core comprises the following steps:
s1, indoor analysis and calculation: the engineering geological condition and the regional hydrogeological condition of a mountain are surveyed on site, the position of a potential sliding surface (belt) is captured, and the size, the pile hole depth and the embedding position of the slide-resistant pile are determined;
s2, digging pile holes: excavating pile holes, and performing wall protection treatment, wherein the radius of each pile hole is larger than that of the anti-slide pile structure;
s3, prefabricating a drainage slide-resistant pile of a 'meter' -shaped pile core filled with permeable aggregate in the drainage hole and the water collecting space of the upper pile body according to the design requirement of the embodiment 1;
s4, lifting the drainage slide-resistant pile of the prefabricated 'meter' -shaped pile core, aligning the pile position, adjusting the verticality of the drainage slide-resistant pile of the prefabricated 'meter' -shaped pile core, and then putting the drainage slide-resistant pile of the prefabricated 'meter' -shaped pile core into the pile hole to reach the designed elevation;
s5, filling the permeable aggregate 6 into the diversion holes 9, and wrapping the geotechnical filter membrane 10 outside the pile body;
s6, backfilling the space between the pile body and the pile hole, tamping, and paving a clay layer 14 on the pile top to prevent the slope surface runoff from flowing backwards into the pile body.
This application structure has drainage and two functions of cling compound concurrently, can effectively resist the hypotenuse slope and warp, especially has very good effect to improving landslide stability under the influence of hydrology factor, and its construction is quick and convenient moreover, can be used for the slope body that has the drainage demand, like bank side slope.
Nothing in this specification is said to apply to the prior art.
Claims (7)
1. A drainage slide-resistant pile structure of a'm' -shaped pile core is characterized by comprising a square solid pile bottom (1) at the lower part, a square outer pile wall (2) at the upper part, a'm' -shaped inner pile core (3) at the upper part, a pile body water collecting space (4) at the upper part, a permeable aggregate (6) and a drainage cushion layer (7); the lower square solid pile bottom (1) penetrates through the sliding surface (13) and goes deep into the bedrock (12), and a plurality of water drainage holes (8) are formed in the lower square solid pile bottom (1); a plurality of flow guide holes (9) are formed in the upper square outer pile wall (2);
an upper meter-shaped inner pile core (3) is arranged in the upper square outer pile wall (2), and an area between the upper square outer pile wall (2) and the upper meter-shaped inner pile core (3) is an upper pile body water collecting space;
a plurality of layers of drainage cushion layers (7) are laid at the corresponding positions of the bottom of the upper pile body water collecting space (4) and the upper part of the lower square solid pile bottom (1);
the water drainage hole (8) and the flow guide hole (9) are communicated with the corresponding upper pile body water collecting space (4); filling permeable aggregate (6) in the upper pile body water collecting space (4), the water drainage hole (8) and the flow guide hole (9);
a lower square solid pile bottom (1), an upper square outer pile wall (2) and an upper square inner pile core (3) are connected into a whole by adopting a reinforcement cage, and the lower square solid pile bottom (1), the upper square outer pile wall (2) and the upper square inner pile core (3) are integrally cast;
the wall thickness of the upper square outer pile core is 2/3 of the wall thickness of the upper square inner pile core; the steel reinforcement cage comprises a rice-shaped steel reinforcement cage (5) and a square steel reinforcement cage (11), the rice-shaped steel reinforcement cage (5) is located in an upper rice-shaped inner pile core (3), the square steel reinforcement cage (11) is located in an upper square outer pile wall (2), the rice-shaped steel reinforcement cage (5) and the square steel reinforcement cage (11) downwards penetrate into the bottom of a lower square solid pile, and the rice-shaped steel reinforcement cage (5) and the square steel reinforcement cage (11) are welded into a whole.
2. A drainage slide pile structure according to claim 1, characterised in that: the cross section of a drainage hole (8) formed in the lower square solid pile bottom (1) is circular or square.
3. A drainage slide pile structure according to claim 1, characterised in that: the thickness d of the upper square outer pile wall (2) is 1/6 of the length l of the section of the pile body; and the upper square outer pile wall (2) is uniformly provided with guide holes (9).
4. A drainage slide pile structure according to claim 1, characterised in that: the cross section of the upper pile body water collecting space (4) is triangular.
5. A drainage slide pile structure according to claim 1, characterised in that: the pervious aggregate (6) is broken stone or pervious stone.
6. A drainage slide pile structure according to claim 1, characterised in that: and the outer side of the upper square outer pile wall (2) is wrapped with a geomembrane (10).
7. A construction method of a drainage slide-resistant pile structure of a'm' type pile core according to any one of claims 1 to 6, characterized in that: the construction method comprises the following specific steps:
s1 field investigation and indoor design: the engineering geological condition and the regional hydrogeological condition of a mountain are surveyed on site, the position of a potential sliding surface or a potential sliding belt is captured, and the size, the pile hole depth and the embedding position of the slide-resistant pile are determined;
s2 prefabricating a reinforcement cage: manufacturing a'm' -shaped reinforcement cage (5) and a square reinforcement cage (11) in a welding mode, and finally, putting the'm' -shaped reinforcement cage (5) into the square reinforcement cage (11) to be welded to form a reinforcement cage whole;
s3, template preparation: processing and manufacturing a square outer template and a triangular inner template according to the size of the square pile;
s4 construction preparation: measuring and positioning the position where the slide-resistant pile needs to be embedded according to an indoor design result, and transporting a reinforcement cage, a cement material, a template and drilling equipment to a construction site;
s5 pile hole construction: excavating the pile hole to the designed depth according to the designed pile position and the size requirement of the pile hole, and performing wall protection treatment on the pile hole according to geological conditions;
s6, pouring a lower square solid pile bottom (1): hoisting the whole reinforcement cage and the square outer template into the pile hole, pouring the lower square solid pile bottom (1) to the designed height and reserving a water drainage hole (8);
s7, pouring an upper square outer pile wall (2) and an upper'm' -shaped inner pile core (3): hoisting the triangular inner template to a designed position, integrally pouring to form an upper square outer pile wall (2) and an upper rice-shaped inner pile core (3), and reserving a flow guide hole (9) in the upper square outer pile wall (2);
s8 aggregate filling: after all the steps are finished, the template is dismantled, permeable aggregate (6) is filled into the drain hole (8), then a drainage cushion layer (7) is laid, and then the permeable aggregate (6) is filled into the upper pile body water collecting space (4) and the diversion hole (9);
s9 backfill tamping: the geotechnical filter membrane (10) is wrapped outside the pile body, then the space between the pile body and the pile hole is backfilled, and the space is tamped and covered with a layer of clay (14) on the pile top.
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| CN111622240B (en) * | 2020-06-02 | 2021-12-07 | 四川大学 | Trapezoidal toe-added drainage slide-resistant pile and construction method thereof |
| CN112761171A (en) * | 2021-01-05 | 2021-05-07 | 安徽理工大学 | Anti-slide pile inserter |
| CN113931202B (en) * | 2021-09-27 | 2023-06-30 | 中铁第四勘察设计院集团有限公司 | Anti-skid drainage system containing hydrophilic minerals for large landslide and construction method |
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| CN105064238A (en) * | 2015-07-21 | 2015-11-18 | 喻良军 | High-strength road pile |
| CN106759390B (en) * | 2016-11-14 | 2018-11-27 | 重庆大学 | A kind of rubble-non-uniform pile composite construction and its construction method with draining and AsA -GSH cycle |
| CN106759274B (en) * | 2016-12-31 | 2018-11-27 | 重庆大学 | A kind of semi-hollow stake and its construction method with draining AsA -GSH cycle |
| CN110016922A (en) * | 2019-05-14 | 2019-07-16 | 河北工业大学 | A kind of novel integral draining anti-slide pile structure and its construction method |
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