CN109137942B - Deformation self-adaptive drainage slide-resistant pile for expansive soil slope and construction method - Google Patents
Deformation self-adaptive drainage slide-resistant pile for expansive soil slope and construction method Download PDFInfo
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- CN109137942B CN109137942B CN201811332042.XA CN201811332042A CN109137942B CN 109137942 B CN109137942 B CN 109137942B CN 201811332042 A CN201811332042 A CN 201811332042A CN 109137942 B CN109137942 B CN 109137942B
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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
Abstract
The invention discloses a deformation self-adaptive drainage anti-slide pile for an expansive soil slope and a construction method, wherein the pile comprises an embedded section, a water storage section and an elastic section, the embedded section comprises a first reinforced concrete precast pile and a first reinforced concrete retaining wall, concrete is poured between the first reinforced concrete precast pile and the first reinforced concrete retaining wall, the water storage section comprises a second reinforced concrete precast pile and a second reinforced concrete retaining wall, broken stones are filled between the second reinforced concrete precast pile and the second reinforced concrete retaining wall, the elastic section comprises a third reinforced concrete precast pile and a concrete pile, and the concrete pile is formed by splicing a plurality of arc-shaped concrete precast piles. The anti-slide pile is divided into the elastic section, the water storage section and the embedded section, the expansion and shrinkage deformation of the expansive soil during dry-wet cycle is coordinated through the deformation of the elastic section, and the generation of vertical tension cracks can be effectively prevented, so that the infiltration of surface layer rainfall is remarkably reduced, and the coordinated control on the expansion and shrinkage deformation of the expansive soil is realized while the anti-slide capability is fully exerted.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a deformation self-adaptive drainage slide-resistant pile for an expansive soil slope and a construction method.
Background
The expansive soil is high-plasticity clay which takes strongly hydrophilic minerals such as montmorillonite, illite and the like as main components, and is mainly characterized by generating obvious expansion deformation after water absorption and obvious contraction deformation after water loss, and also has multi-crack property, super-consolidation property and strength attenuation property. The engineering characteristics are complex and difficult to treat, and the engineering characteristics are often called 'problem soil', so that a lot of troubles are caused to engineering construction.
Unstable landslide often occurs on soil slopes in expansive soil areas, such as embankments, cutting, channel slopes and the like. The instability mechanism of the expansive soil side slope is as follows: when the rainfall occurs, the expansive soil absorbs water to expand, so that the internal structure of the soil block is expanded and loosened, and the strength index of the soil block is obviously reduced; when the soil is dried, the expansive soil loses water and shrinks to form a tensile crack, so that the soil body structure on the surface layer of the side slope is degraded; the crack can be used as a channel for rainwater to rapidly infiltrate during next rainfall, so that the soil body strength is further deteriorated and the crack is further expanded under the action of dryness and wetness; in addition, the pore water pressure in the soil body can be obviously improved after rainfall infiltration, so that the effective stress is reduced; the expansive soil slope finally generates collapsing type integral instability under the comprehensive action of the factors.
At present, the engineering community has no perfect treatment method for the expansive soil side slope, and the method mainly adopts the method of integrally replacing and filling the non-expansive soil; or the weak expansive soil is modified into non-expansive soil by adding materials such as cement, lime and the like for replacement and filling, the replacement and filling mainly has the function of weight pressing, and the secondary function of sealing the expansive soil, but the method has larger engineering quantity and high cost, and cannot fundamentally prevent landslide.
The anti-slide pile is an effective engineering measure for treating landslide and is widely applied to the treatment of side slope. It provides the anti-slip force by inserting the pile into the stable stratum under the sliding bed, and stabilizes the slope by embedding the pile body into the soil around the pile. A great deal of research and improvement on the slide piles are also performed by a large number of scholars, and more novel slide piles, such as various types of drainage slide piles, are proposed. Although the expansive soil has expansion and shrinkage properties, the expansive soil also has super-consolidation property, has higher strength when not subjected to dry-wet cycle action or a small amount of dry-wet cycle action, and is also very stable on the expansive soil slope. However, the surface soil body of the side slope generates a large amount of macroscopic and microscopic cracks after undergoing a plurality of dry-wet cycles, which damages the integrity of the slope body on one hand, and provides a channel for rapid infiltration of rainfall on the other hand, thereby threatening the overall stability of the side slope. Therefore, the key to maintaining the stability of the expansive soil slope is to prevent rapid infiltration of surface precipitation. The conventional anti-slide pile can not solve the problem of infiltration of the expansive soil side slope, and various drainage anti-slide piles focus on the infiltration and drainage of pore water in the soil body and can not effectively prevent rainwater from infiltrating. For the reasons mentioned above, it is difficult to effectively solve the instability problem of the expansive soil slope with the existing type of anti-slide pile.
Aiming at the technical defects of the existing type of slide-resistant pile in treating the expansive soil side slope, the invention provides the novel slide-resistant pile which can control surface layer rainfall to rapidly infiltrate and can discharge the infiltrated water in time.
Disclosure of Invention
The invention aims to solve the technical problem of providing a deformation self-adaptive drainage slide-resistant pile for an expansive soil slope and a construction method aiming at the defects of the prior art. The invention coordinates the swelling and shrinking deformation of the expansive soil in the dry-wet cycle through the deformation of the elastic section, the elastic section shrinks when the expansive soil absorbs water and expands, and the elastic section deforms and recovers when the expansive soil is dehydrated and contracts, thereby providing no deformation space for the generation of macroscopic tension cracks, effectively preventing the generation of vertical tension cracks and obviously reducing the infiltration of surface layer precipitation. The coordinated control of the expansion and shrinkage deformation of the expansive soil is realized while the integral anti-skid capability of the anti-skid pile is fully exerted.
In order to solve the technical problems, the invention adopts the technical scheme that: a deformation self-adaptive drainage anti-slide pile for an expansive soil slope is characterized by comprising an embedded section, a water storage section and an elastic section which are sequentially distributed from bottom to top, wherein the embedded section comprises a first reinforced concrete precast pile and a first reinforced concrete retaining wall sleeved on the outer side of the first reinforced concrete precast pile, concrete is poured between the first reinforced concrete precast pile and the first reinforced concrete retaining wall, the water storage section comprises a second reinforced concrete precast pile and a second reinforced concrete retaining wall sleeved on the outer side of the second reinforced concrete precast pile, broken stones are filled between the second reinforced concrete precast pile and the second reinforced concrete retaining wall, the elastic section comprises a third reinforced concrete precast pile and a concrete pile sleeved on the outer side of the third reinforced concrete precast pile, the concrete pile is of a cylindrical structure, and the concrete pile is formed by splicing a plurality of arc-shaped precast piles, the adjacent two arc-shaped concrete prefabricated parts are connected through the spring assembly, elastic assemblies are arranged between the third reinforced concrete prefabricated part and the arc-shaped concrete prefabricated parts, each elastic assembly comprises a plurality of elastic pieces which are uniformly distributed along the axial direction of the third reinforced concrete prefabricated part, one end of each elastic piece is fixed on the inner side of the arc-shaped concrete prefabricated part, and the other end of each elastic piece is fixed on the outer side of the third reinforced concrete prefabricated part.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that the first reinforced concrete precast pile and the second reinforced concrete precast pile are of an integrated structure, and the first reinforced concrete retaining wall and the second reinforced concrete retaining wall are of an integrated structure.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that folding members are arranged between two adjacent arc-shaped concrete prefabricated members and on two sides of the spring assembly, the left end of each folding member is fixedly connected with the arc-shaped concrete prefabricated member on the left side of the folding member, and the right end of each folding member is fixedly connected with the arc-shaped concrete prefabricated member on the right side of the folding member.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that the folding component comprises two folding plates which are connected in a rotating mode through a rotating shaft, a compression spring is arranged between the two folding plates, and a through hole is formed in the folding plates in the thickness direction of the folding plates.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that a geomembrane is arranged on the outer surface of the folding component positioned on the outer side of the spring assembly.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that one end of the compression spring is fixed on the inner side of one folding plate, and the other end of the compression spring is fixed on the inner side of the other folding plate.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that the spring assembly comprises a plurality of spring parts which are arranged between two adjacent arc-shaped concrete prefabricated parts and are uniformly distributed along the axial direction of the concrete pile.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that the elastic part is a steel spring, and a pile cover is arranged above the elastic section.
The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that a water collecting gap is formed between the third reinforced concrete precast pile and the concrete pile, and a water collecting pipe communicated with the water collecting gap is arranged on the outer side of the arc-shaped concrete precast part.
In addition, the invention also provides a construction method of the deformation self-adaptive drainage slide-resistant pile for the expansive soil slope, which is characterized by comprising the following steps of:
step one, determining a local rainfall limit working condition according to the climate condition of an actual construction site, and calculating the rainfall infiltration depth by using the following formula:
wherein h is the infiltration depth of the precipitation, and the unit is meter; k is the saturation permeability coefficient of the soil body, and the unit is meter/hour; t is the continuous rainfall time in hours; s0The initial saturation of the soil body; n is the porosity of the soil body;
step two, designing the length of the elastic section to be h to (h +0.5) meter according to the precipitation infiltration depth h obtained by calculation in the step one; determining the depth of a foundation rock surface according to survey data of an actual construction terrain and a side slope, thereby determining the length of a water storage section, enabling the bottom of the water storage section to be located on the foundation rock surface, and designing the length of an embedded section to be 1/3-2/5 of the total length of the slide-resistant pile;
step three, drilling construction is carried out on the side slope, a concrete retaining wall is poured in the drilling construction process to form a first reinforced concrete retaining wall and a second reinforced concrete retaining wall, and a first reinforced concrete precast pile and a second reinforced concrete precast pile are placed in a drill hole;
pouring concrete between the first reinforced concrete retaining wall and the first reinforced concrete precast pile to form an embedded section, wherein the embedded section is fixed in the bedrock; filling broken stones between the second reinforced concrete retaining wall and the second reinforced concrete precast pile to form a water storage section;
fifthly, welding an elastic component on the outer wall of the third reinforced concrete precast pile, then placing a plurality of arc-shaped concrete precast parts on the outer side of the third reinforced concrete precast pile and welding and connecting the arc-shaped concrete precast parts with the elastic components at corresponding positions, and then connecting two adjacent arc-shaped concrete precast parts by using a spring component to form an elastic section;
and step six, placing the elastic section in the drill hole and above the water storage section, and then covering the elastic section with a pile cover.
Compared with the prior art, the invention has the following advantages:
1. the invention is provided with the elastic section, the swelling and shrinking deformation of the expansive soil during the dry-wet cycle is coordinated through the deformation of the elastic section, the elastic section shrinks when the expansive soil absorbs water and is expanded, and the elastic section deforms and recovers when the expansive soil is dehydrated and shrunk, so that a deformation space is not provided for the generation of macroscopic crack propagation, the generation of vertical crack propagation can be effectively prevented, and the infiltration of surface layer precipitation is obviously reduced.
2. The invention utilizes the water collecting pipe system outside the elastic section to collect a small amount of precipitation infiltrated in the slope body to the water storage section, and can quickly and effectively discharge the infiltration.
3. The anti-slide pile is divided into the elastic section, the water storage section and the embedding section, so that the integral anti-slide capability of the anti-slide pile is fully exerted, and the expansion and contraction deformation coordination control of the expansive soil is realized by utilizing the deformation characteristic of the anti-slide pile.
4. The structure of the elastic section comprises an internal reinforced concrete precast pile, a plurality of external discrete arc-shaped concrete precast parts, an elastic component between the internal reinforced concrete precast pile and the external discrete arc-shaped concrete precast parts and a spring component between two adjacent arc-shaped concrete precast parts, and has the advantages of strong soil body deformation adapting capability, good elasticity recovery, contribution to water collection and the like; according to the invention, the folding members with the through holes are preferably arranged on the two sides of the spring assembly, and the geomembrane is arranged on the outer surface of the folding member outside the spring assembly, so that the effect of soil and water seepage separation is effectively achieved. Compared with other types of drainage slide-resistant piles, the drainage slide-resistant pile has remarkable innovation in structure.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a front view of a deformed adaptive drainage friction pile of the present invention.
FIG. 2 is a schematic cross-sectional view of an elastic segment of the present invention.
Fig. 3 is a partially enlarged view of a portion a of fig. 2.
Fig. 4 is a schematic structural view of the folding member of the present invention.
Fig. 5 is a schematic cross-sectional view of a water storage section of the present invention.
Fig. 6 is a schematic cross-sectional view of an embedment section of the invention.
Fig. 7 is a schematic diagram of the position of the deformed adaptive drainage anti-slide pile on a slope.
Description of reference numerals:
1-an embedding section; 2-water storage section; 3-an elastic section;
4, first precast reinforced concrete piles; 5-a first reinforced concrete retaining wall;
6, concrete; 7, constructing a second reinforced concrete precast pile;
8-second reinforced concrete dado; 9-crushing stones;
10-a third reinforced concrete precast pile; 11-arc concrete prefabricated member;
12-a spring assembly; 13-an elastic member;
14-a folding member; 14-1-folding plate;
14-2-rotation axis; 14-3-through hole;
14-4-compression spring; 15-water collecting gaps;
16-a water collecting pipe; 17-pile cover.
Detailed Description
Example 1
As shown in fig. 1, 2, 5 and 6, the deformable self-adaptive drainage anti-slide pile for the expansive soil slope of the invention comprises an embedded section 1, a water storage section 2 and an elastic section 3 which are sequentially distributed from bottom to top, wherein the embedded section 1 comprises a first reinforced concrete precast pile 4 and a first reinforced concrete retaining wall 5 sleeved outside the first reinforced concrete precast pile 4, concrete 6 is poured between the first reinforced concrete precast pile 4 and the first reinforced concrete retaining wall 5, the water storage section 2 comprises a second reinforced concrete precast pile 7 and a second reinforced concrete retaining wall 8 sleeved outside the second reinforced concrete precast pile 7, broken stones 9 are filled between the second reinforced concrete precast pile 7 and the second reinforced concrete retaining wall 8, the elastic section 3 comprises a third reinforced concrete precast pile 10 and a concrete pile sleeved outside the third reinforced concrete precast pile 10, the concrete pile is of a cylindrical structure, the concrete pile is formed by splicing a plurality of arc-shaped concrete prefabricated parts 11, two adjacent arc-shaped concrete prefabricated parts 11 are connected through a spring assembly 12, elastic assemblies are arranged between the third reinforced concrete prefabricated pile 10 and the arc-shaped concrete prefabricated parts 11 respectively, each elastic assembly comprises a plurality of elastic pieces 13 which are uniformly arranged along the axial direction of the third reinforced concrete prefabricated pile 10, one ends of the elastic pieces 13 are fixed on the inner sides of the arc-shaped concrete prefabricated parts 11, and the other ends of the elastic pieces 13 are fixed on the outer sides of the third reinforced concrete prefabricated piles 10.
In this embodiment, the first reinforced concrete precast pile 4 and the second reinforced concrete precast pile 7 are of an integrated structure, and the first reinforced concrete retaining wall 5 and the second reinforced concrete retaining wall 8 are of an integrated structure.
As shown in fig. 2, in this embodiment, a folding member 14 is disposed between two adjacent arc-shaped concrete prefabricated members 11 and on both sides of the spring assembly 12, a left end of the folding member 14 is fixedly connected to the arc-shaped concrete prefabricated member 11 on the left side thereof, and a right end of the folding member 14 is fixedly connected to the arc-shaped concrete prefabricated member 11 on the right side thereof.
In the embodiment shown in fig. 3 and 4, the folding member 14 includes two folding plates 14-1, the two folding plates 14-1 are rotatably connected by a rotating shaft 14-2, a compression spring 14-4 is disposed between the two folding plates 14-1, and a through hole 14-3 is disposed on the folding plate 14-1 along the thickness direction of the folding plate 14-1.
In this embodiment, the outer surface of the folding member 14, which is located outside the spring assembly 12, is provided with a geomembrane.
In this embodiment, one end of the compression spring 14-4 is fixed to the inner side of one folding plate 14-1, and the other end of the compression spring 14-4 is fixed to the inner side of the other folding plate 14-1.
In this embodiment, the spring assembly 12 includes a plurality of spring members disposed between two adjacent arc-shaped concrete prefabricated members 11 and uniformly arranged along the axial direction of the concrete pile.
In this embodiment, the elastic member 13 is a steel spring, and a pile cover 17 is disposed above the elastic section 3.
In this embodiment, a water collecting gap 15 is formed between the third precast reinforced concrete pile 10 and the concrete pile, and a water collecting pipe 16 communicated with the water collecting gap 15 is disposed on the outer side of the arc-shaped precast concrete 11.
Example 2
The invention relates to a construction method of a deformation self-adaptive drainage slide-resistant pile for an expansive soil slope, which comprises the following steps of:
step one, determining a local rainfall limit working condition according to the climate condition of an actual construction site, and calculating the rainfall infiltration depth by using the following formula:
wherein h is the infiltration depth of the precipitation, and the unit is meter; k is the saturation permeability coefficient of the soil body, and the unit is meter/hour; t is the continuous rainfall time in hours; s0The initial saturation of the soil body; n is the porosity of the soil body;
step two, according to the precipitation infiltration depth h calculated in the step one, the length of the elastic section 3 is designed to be h to (h +0.5) m, and the specific length can be finally determined according to experience and the instability depth of the local expansive soil slope; determining the depth of a foundation rock surface according to survey data of an actual construction terrain and a side slope, thereby determining the length of the water storage section 2, enabling the bottom of the water storage section 2 to be located on the foundation rock surface, and designing the length of the embedded section 1 to be 1/3-2/5 of the total length of the slide-resistant pile, wherein the specific length can be determined according to actual construction site conditions and the design specifications of the slide-resistant pile treatment engineering;
step three, drilling construction is carried out on the side slope, concrete retaining walls are poured in the drilling construction process to form a first reinforced concrete retaining wall 5 and a second reinforced concrete retaining wall 8, and the first reinforced concrete precast pile 4 and the second reinforced concrete precast pile 7 are placed in the drill hole;
pouring concrete 6 between the first reinforced concrete retaining wall 5 and the first reinforced concrete precast pile 4 to form an embedded section 1, wherein the embedded section 1 is fixed in bedrock; filling broken stones 9 between the second reinforced concrete retaining wall 8 and the second reinforced concrete precast pile 7 to form a water storage section 2;
fifthly, welding an elastic component on the outer wall of the third reinforced concrete precast pile 10, then placing a plurality of arc-shaped concrete precast members 11 on the outer side of the third reinforced concrete precast pile 10 and welding and connecting the arc-shaped concrete precast members with the elastic component at corresponding positions, and fixing a folding member 14 and a spring component 12 between two adjacent arc-shaped concrete precast members 11 to form an elastic section 3;
step six, as shown in fig. 7, the elastic section 3 is placed in the drill hole and above the water storage section 2, and then the pile cover 17 is covered above the elastic section 3.
When the drainage anti-slide pile is used, the elastic section shrinks when the expansive soil absorbs water and expands through the special structure of the elastic section, and the elastic section deforms and recovers when the expansive soil is dehydrated and contracted, so that a deformation space is not provided for the generation of macroscopic tear cracks, the generation of vertical tear cracks can be effectively prevented, and the infiltration of surface layer precipitation is remarkably reduced. Through setting up the space that catchments in the elasticity section, the collector pipe on the elasticity section can collect the internal portion of slope a small amount of precipitation that infiltrates to the water storage section through the space that catchments to effectively arrange the infiltration of cominging in and going out fast. The drainage slide-resistant pile has the advantages of strong soil body deformation adapting capability, good recovery elasticity, contribution to water collection and the like.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The deformation self-adaptive drainage anti-slide pile for the expansive soil slope is characterized by comprising an embedded section (1), a water storage section (2) and an elastic section (3) which are sequentially distributed from bottom to top, wherein the embedded section (1) comprises a first reinforced concrete precast pile (4) and a first reinforced concrete retaining wall (5) sleeved outside the first reinforced concrete precast pile (4), concrete (6) is poured between the first reinforced concrete precast pile (4) and the first reinforced concrete retaining wall (5), the water storage section (2) comprises a second reinforced concrete precast pile (7) and a second reinforced concrete retaining wall (8) sleeved outside the second reinforced concrete precast pile (7), broken stones (9) are filled between the second reinforced concrete pile (7) and the second reinforced concrete retaining wall (8), and the elastic section (3) comprises a third reinforced concrete precast pile (10) and a third reinforced concrete precast pile (10) sleeved outside the third reinforced concrete precast pile (10) ) The concrete pile in outside, the concrete pile is cylindric structure, and the concrete pile is formed by a plurality of arc precast concrete members (11) concatenation, connects through spring assembly (12) between two adjacent arc precast concrete members (11), all is provided with elastic component between third precast concrete pile (10) and a plurality of arc precast concrete members (11), elastic component includes a plurality of elastic component (13) of evenly laying along the axial of third precast concrete pile (10), the one end of elastic component (13) is fixed in the inboard of arc precast concrete member (11), and the other end of elastic component (13) is fixed in the outside of third precast concrete pile (10).
2. The deformation self-adaptive drainage slide-resistant pile for the expansive soil slope is characterized in that the first reinforced concrete precast pile (4) and the second reinforced concrete precast pile (7) are of an integrated structure, and the first reinforced concrete retaining wall (5) and the second reinforced concrete retaining wall (8) are of an integrated structure.
3. A deformed self-adaptive drainage slide-resistant pile for an expansive soil slope, as claimed in claim 1, wherein a folding member (14) is arranged between two adjacent arc-shaped concrete prefabricated members (11) and on both sides of the spring assembly (12), the left end of the folding member (14) is fixedly connected with the arc-shaped concrete prefabricated member (11) on the left side, and the right end of the folding member (14) is fixedly connected with the arc-shaped concrete prefabricated member (11) on the right side.
4. A deformation adaptive drainage anti-slide pile for expansive soil slope according to claim 3, characterized in that the folding member (14) comprises two folding plates (14-1), the two folding plates (14-1) are rotatably connected through a rotating shaft (14-2), a compression spring (14-4) is arranged between the two folding plates (14-1), and a through hole (14-3) is arranged on the folding plate (14-1) along the thickness direction of the folding plate (14-1).
5. A transformative adaptive drainage skid for an expansive soil slope according to claim 4, wherein the outer surface of the folding member (14) located outside the spring assembly (12) is provided with a geomembrane.
6. A transformational adaptive drainage slide pile for expansive soil slopes, according to claim 4, wherein one end of the compression spring (14-4) is fixed to the inside of one folding plate (14-1), and the other end of the compression spring (14-4) is fixed to the inside of the other folding plate (14-1).
7. A deformation adaptive drainage stake for expansive soil slope according to claim 1, wherein said spring assembly (12) comprises a plurality of spring members disposed between two adjacent arc-shaped concrete precast members (11) and uniformly arranged along the axial direction of the concrete stake.
8. The deformation adaptive drainage slide-resistant pile for expansive soil slope according to claim 1, wherein the elastic member (13) is a steel spring, and a pile cover (17) is arranged above the elastic section (3).
9. The deformed self-adaptive drainage anti-slide pile for the expansive soil slope is characterized in that a water collecting gap (15) is formed between the third precast reinforced concrete pile (10) and the concrete pile, and a water collecting pipe (16) communicated with the water collecting gap (15) is arranged on the outer side of the arc-shaped precast concrete pile (11).
10. A construction method of the deformation adaptive drainage slide pile for the expansive soil slope according to any one of claims 1 to 9, comprising the steps of:
step one, determining a local rainfall limit working condition according to the climate condition of an actual construction site, and calculating the rainfall infiltration depth by using the following formula:
wherein h is the infiltration depth of the precipitation, and the unit is meter; k is the saturation permeability coefficient of the soil body, and the unit is meter/hour; t is the continuous rainfall time in hours; s0The initial saturation of the soil body; n is the porosity of the soil body;
step two, designing the length of the elastic section (3) to be h to (h +0.5) m according to the precipitation infiltration depth h obtained by calculation in the step one; determining the depth of a foundation rock surface according to survey data of an actual construction terrain and a side slope, thereby determining the length of the water storage section (2), enabling the bottom of the water storage section (2) to be located on the foundation rock surface, and designing the length of the embedded section (1) to be 1/3-2/5 of the total length of the slide-resistant pile;
step three, drilling construction is carried out on the side slope, a concrete retaining wall is poured in the drilling construction process to form a first reinforced concrete retaining wall (5) and a second reinforced concrete retaining wall (8), and the first reinforced concrete precast pile (4) and the second reinforced concrete precast pile (7) are placed in the drill hole;
pouring concrete (6) between the first reinforced concrete retaining wall (5) and the first reinforced concrete precast pile (4) to form an embedded section (1), wherein the embedded section (1) is fixed in bedrock; filling broken stones (9) between the second reinforced concrete retaining wall (8) and the second reinforced concrete precast pile (7) to form a water storage section (2);
fifthly, welding an elastic component on the outer wall of the third reinforced concrete precast pile (10), then placing a plurality of arc-shaped concrete precast pieces (11) on the outer side of the third reinforced concrete precast pile (10) and welding and connecting the arc-shaped concrete precast piles with the elastic component at the corresponding positions, and then connecting two adjacent arc-shaped concrete precast pieces (11) by using a spring component (12) to form an elastic section (3);
and step six, placing the elastic section (3) in the drill hole and above the water storage section (2), and then covering the elastic section (3) with a pile cover (17).
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| CN110172981B (en) * | 2019-06-05 | 2020-05-05 | 招商局重庆交通科研设计院有限公司 | Self-precipitation prestressed anti-slip pipe pile and construction method thereof |
| CN110359450B (en) * | 2019-07-29 | 2024-03-08 | 中铁二院工程集团有限责任公司 | Assembled round pile structure and construction method |
| CN110528540B (en) * | 2019-08-23 | 2020-10-23 | 河北工业大学 | Drainage slide-resistant pile structure with embedded pile columns and construction method thereof |
| CN111622240B (en) * | 2020-06-02 | 2021-12-07 | 四川大学 | Trapezoidal toe-added drainage slide-resistant pile and construction method thereof |
| CN112411583A (en) * | 2020-12-10 | 2021-02-26 | 中国地质科学院探矿工艺研究所 | Integrated form side slope drainage reinforcerment system |
| CN112376590A (en) * | 2020-12-10 | 2021-02-19 | 中国地质科学院探矿工艺研究所 | Anti-skidding structure adaptive to swelling and shrinking deformation of expansive soil slope and application method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202913416U (en) * | 2012-11-07 | 2013-05-01 | 宁波大学 | Drainage slide-resistant pile |
| CN104389307A (en) * | 2014-12-08 | 2015-03-04 | 中铁西北科学研究院有限公司勘察设计分公司 | Self-resetting slide-resistant pile structure with energy consumption function and implementation method thereof |
| CN205502032U (en) * | 2016-03-30 | 2016-08-24 | 陕西省高速公路建设集团公司 | Native slope reinforcement structure expands |
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2018
- 2018-11-09 CN CN201811332042.XA patent/CN109137942B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202913416U (en) * | 2012-11-07 | 2013-05-01 | 宁波大学 | Drainage slide-resistant pile |
| CN104389307A (en) * | 2014-12-08 | 2015-03-04 | 中铁西北科学研究院有限公司勘察设计分公司 | Self-resetting slide-resistant pile structure with energy consumption function and implementation method thereof |
| CN205502032U (en) * | 2016-03-30 | 2016-08-24 | 陕西省高速公路建设集团公司 | Native slope reinforcement structure expands |
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