CN110952573A - L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof - Google Patents

L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof Download PDF

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Publication number
CN110952573A
CN110952573A CN201911218625.4A CN201911218625A CN110952573A CN 110952573 A CN110952573 A CN 110952573A CN 201911218625 A CN201911218625 A CN 201911218625A CN 110952573 A CN110952573 A CN 110952573A
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CN
China
Prior art keywords
pile
horizontal
slope
vertical
water level
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Pending
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CN201911218625.4A
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Chinese (zh)
Inventor
刘素嘉
张嘎
罗方悦
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Tsinghua University
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Tsinghua University
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Priority to CN201911218625.4A priority Critical patent/CN110952573A/en
Publication of CN110952573A publication Critical patent/CN110952573A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • E02D17/207Securing of slopes or inclines with means incorporating sheet piles or piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0018Cement used as binder
    • E02D2300/002Concrete

Abstract

An L-shaped anti-slide pile for reinforcing a soil slope by a water level variable belt comprises a plurality of L-shaped pile bodies formed by connecting a section of vertical pile and a section of horizontal pile, wherein the horizontal pile is poured into a base body of the landslide along the direction perpendicular to the slope, the lower end of the vertical pile is connected with the outer end of the horizontal pile, sequentially penetrates through the base body and a slip crack surface from bottom to top and is deep into a sliding body; the invention also provides a construction method of the L-shaped slide-resistant pile for reinforcing the soil slope by the water level variable belt, and the traditional slide-resistant pile is improved according to the stress characteristic of the slide-resistant pile for reinforcing the side slope by the water level variable belt, so that the reinforcing effect and stability of the slide-resistant pile under the condition of water level variation are improved.

Description

L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof
Technical Field
The invention belongs to the technical field of water conservancy construction, relates to soil slope reinforcement under a water level change condition, and particularly relates to an L-shaped slide-resistant pile for reinforcing a soil slope by a water level change belt and a construction method thereof.
Background
The water level variation has a high possibility of influencing the stability of the slope, and is an important reason for landslide. For example, after the three gorges reservoir stores water in 2003, obvious water level changes are caused, the hydrogeological environment of the side slope of the reservoir area is changed remarkably, landslide will often occur, and reservoir water level changes are the main factors causing landslide. In order to prevent landslide disasters, tools such as anti-slide piles, retaining walls, geotextiles and the like are adopted in engineering to reinforce the side slope. The anti-slide pile is a common structure in slope retaining engineering, and is widely applied to slope reinforcement engineering due to the advantages of convenience in construction, good reinforcement effect and the like. However, the cohesive force of the soil below the water level is greatly reduced, so that sufficient anchoring force cannot be provided for the pile foundation, and the reinforcing capacity of the conventional slide-resistant pile in the water level fluctuation zone is remarkably reduced. Tests prove that the reinforcing effect of the traditional slide-resistant pile under the condition of water level change is obviously weakened, and instability is easy to occur.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims at the stress characteristic of the anti-slide pile for reinforcing the side slope by the water level variable belt, transforms the traditional anti-slide pile, provides the L-shaped anti-slide pile for reinforcing the soil slope by the water level variable belt and the construction method pile thereof, and improves the reinforcing effect and stability of the anti-slide pile under the condition of water level variation.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a L type friction pile for water level fluctuation area consolidates soil slope, includes a plurality of L type pile body 4 of being formed by one section vertical pile and one section horizontal pile connection, and wherein, horizontal pile pours into in the base member 1 of landslide along the trend of perpendicular to side slope, and vertical stake lower extreme is connected with the horizontal pile outer end, and runs through base member 1 and slip crack face 3 in proper order from bottom to top and deepens to in the slider 2.
The vertical pile comprises a vertical section steel reinforcement cage 41 filled with concrete, the horizontal pile comprises a horizontal section steel reinforcement cage 42 filled with concrete, and retaining wall concrete 43 is arranged outside the vertical section steel reinforcement cage 41 and the horizontal section steel reinforcement cage 42.
The L-shaped pile bodies 4 can be arranged at equal intervals along the direction of the side slope.
The invention also provides a construction method of the L-shaped slide-resistant pile for reinforcing the soil slope by the water level change belt, which comprises the following steps:
1) excavating an orifice of the vertical pile, installing a retaining wall template, and pouring retaining wall concrete;
2) arranging a reinforcement cage 41 at the vertical section;
3) excavating a horizontal pile hole from the slope surface, intersecting the vertical pile hole, continuously extending a distance into the slope to form a horizontal section, installing a retaining wall template, and pouring retaining wall concrete;
4) a horizontal section reinforcement cage 42 is arranged in the horizontal section;
5) pouring concrete until the concrete is filled;
6) and backfilling the surface of the side slope to the hole opening of the vertical pile.
Compared with the prior art, the invention has the beneficial effects that:
1) the stability of the slide-resistant pile is improved.
2) The reinforcing effect of the slide-resistant pile under the condition of water level variation is improved.
3) The construction method is simple, the cost is low, and the method can be widely applied (suitable for cohesive soil areas).
Drawings
Fig. 1 is a schematic structural view (front view) of an L-shaped slide-resistant pile of the present invention.
Fig. 2 is a schematic structural view (top view) of the L-shaped slide-resistant pile of the present invention.
Fig. 3 is a schematic layout view (perspective view) of the L-shaped slide-resistant pile of the present invention.
Fig. 4 is a schematic layout (front view) of the L-shaped slide-resistant piles of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1 and 2, the L-shaped slide-resistant pile for reinforcing the soil slope with the water level change comprises a plurality of L-shaped pile bodies 4 formed by connecting a section of vertical pile and a section of horizontal pile, wherein the vertical pile is positioned above the horizontal pile.
In one form of the invention, the vertical pile includes a vertical section reinforcement cage 41 that is poured with concrete, the horizontal pile includes a horizontal section reinforcement cage 42 that is poured with concrete, and retaining wall concrete 43 is poured around the outside of both the vertical section reinforcement cage 41 and the horizontal section reinforcement cage 42.
According to the analysis of the traditional anti-slide pile soil slope reinforcing test under the condition of water level change, the instability of the anti-slide pile is mainly shown as rotating around the pile bottom. The anti-slide pile is designed to be L-shaped, and the horizontal section at the bottom of the anti-slide pile is stressed by the pressure and the friction force of the soil body to provide a moment opposite to the rotation direction, so that the stability of the anti-slide pile is improved.
As shown in fig. 3 and 4, the structure of the landslide comprises a base body 1, a sliding body 2 and a slip surface 3, wherein each L-shaped pile body 4 is arranged along the direction of the side slope at equal intervals, vertical piles are arranged in the direction vertical to the horizontal plane, horizontal piles are arranged in the horizontal plane and are poured into the base body 1 of the landslide in the direction vertical to the direction of the side slope, the lower ends of the vertical piles are connected with the outer ends (or the positions close to the outer ends) of the horizontal piles, and the vertical piles sequentially penetrate through the base body 1 and the slip surface 3 from bottom to top and penetrate into the sliding body 2, wherein the outer ends are the ends far away from the slip surface 3. The arrangement mode enables the resistance of the L-shaped slide-resistant pile to be obviously increased in rotation, and the stability is obviously improved.
The invention also provides a construction method of the L-shaped slide-resistant pile for reinforcing the soil slope by the water level change belt, which comprises the following steps:
1) excavating a vertical pile mounting hole on the slope along the vertical direction, binding retaining wall reinforcing steel bars, mounting a retaining wall template, and pouring retaining wall concrete;
2) after the vertical pile mounting hole wall is demolded, a crane is used for arranging the vertical section reinforcement cage 41 in the vertical pile mounting hole;
3) excavating a horizontal pile mounting hole from the slope surface, intersecting with the vertical pile mounting hole, continuously extending a distance into the slope to form a horizontal section, binding retaining wall reinforcing steel bars at the horizontal section, mounting a retaining wall template, and pouring retaining wall concrete;
4) a horizontal section reinforcement cage 42 is arranged in the horizontal section;
5) pouring concrete of the vertical section and the horizontal section simultaneously, stirring the slurry evenly, conveying the slurry to the bottom of the horizontal section by using a mortar pump after sieving, and stopping grouting after confirming that the slurry is full;
6) and backfilling the slope surface to the vertical pile mounting hole.
The construction method has the advantages of simple process, low cost and wide application range.

Claims (4)

1. The utility model provides a L type friction pile for water level fluctuation area consolidates soil slope which characterized in that, includes a plurality of L type pile body (4) of being formed by one section vertical pile and one section horizontal pile connection, and wherein, horizontal pile pours into in the base member (1) of landslide along the trend of perpendicular to side slope, and vertical stake lower extreme is connected with horizontal pile outer end, and runs through base member (1) and slip crack face (3) and deepens to in the sliding mass (2) from bottom to top in proper order.
2. The L-shaped anti-slide pile with the function of reinforcing the soil slope for the water level variation according to claim 1, wherein the vertical pile comprises a vertical section reinforcement cage (41) filled with concrete, the horizontal pile comprises a horizontal section reinforcement cage (42) filled with concrete, and the outer parts of the vertical section reinforcement cage (41) and the horizontal section reinforcement cage (42) are provided with retaining wall concrete (43).
3. The L-shaped slide-resistant pile for water level change and soil slope reinforcement according to claim 1, characterized in that the L-shaped pile bodies (4) are arranged at equal intervals along the slope.
4. The method for constructing an L-shaped slide-resistant pile for reinforcing a soil slope with a water level variable zone as claimed in claim 1, wherein the steps are as follows:
1) excavating an orifice of the vertical pile, installing a retaining wall template, and pouring retaining wall concrete;
2) arranging a reinforcement cage (41) of a vertical section;
3) excavating a horizontal pile hole from the slope surface, intersecting the vertical pile hole, continuously extending a distance into the slope to form a horizontal section, installing a retaining wall template, and pouring retaining wall concrete;
4) a horizontal section reinforcement cage (42) is arranged in the horizontal section;
5) pouring concrete until the concrete is filled;
6) and backfilling the surface of the side slope to the hole opening of the vertical pile.
CN201911218625.4A 2019-12-03 2019-12-03 L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof Pending CN110952573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911218625.4A CN110952573A (en) 2019-12-03 2019-12-03 L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911218625.4A CN110952573A (en) 2019-12-03 2019-12-03 L-shaped slide-resistant pile for reinforcing soil slope by water level change belt and construction method thereof

Publications (1)

Publication Number Publication Date
CN110952573A true CN110952573A (en) 2020-04-03

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CN (1) CN110952573A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201144421Y (en) * 2007-12-21 2008-11-05 中铁二院工程集团有限责任公司 Antiskid supporting and retaining structure
CN203782684U (en) * 2014-04-09 2014-08-20 中冶集团武汉勘察研究院有限公司 Anti-skid pile provided with crossbeam
CN104018496A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Round-section slide-resistant pile with pile body provided with horizontal haunched beam and construction method of round-section slide-resistant pile
CN104018490A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Z-shaped rectangular-section anti-skidding pile and construction method thereof
JP6514985B2 (en) * 2015-07-28 2019-05-15 東日本旅客鉄道株式会社 Earth retaining wall reinforcement structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201144421Y (en) * 2007-12-21 2008-11-05 中铁二院工程集团有限责任公司 Antiskid supporting and retaining structure
CN203782684U (en) * 2014-04-09 2014-08-20 中冶集团武汉勘察研究院有限公司 Anti-skid pile provided with crossbeam
CN104018496A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Round-section slide-resistant pile with pile body provided with horizontal haunched beam and construction method of round-section slide-resistant pile
CN104018490A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Z-shaped rectangular-section anti-skidding pile and construction method thereof
CN104018496B (en) * 2014-05-13 2017-01-04 中冶集团武汉勘察研究院有限公司 A kind of pile body arranges circular cross-section friction pile and the construction method thereof of Horizontal hunche beam
JP6514985B2 (en) * 2015-07-28 2019-05-15 東日本旅客鉄道株式会社 Earth retaining wall reinforcement structure

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