Landslide support system based on inclined anti-slide pile, landslide thrust calculation method, inclination angle optimization method and construction method

A calculation method and technology for anti-sliding piles, which are applied in foundation structure engineering, excavation, sheet pile wall, etc. Anti-slip stability requirements of the amount of steel bars to achieve the effect of increasing the vertical bearing capacity and pull-out force, reducing the cost of materials, and reducing the amount of reinforcing bars

Active Publication Date: 2021-06-18
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current slope support projects using bored piles, the effect of the vertical bearing capacity of bored piles has not been fully utilized, resulting in the need for larger pile cross-sectional dimensions and increased steel reinforcement to meet the anti-sliding stability Require
[0004] Based on the above, in order to solve the problem that the vertical bearing capacity cannot be fully utilized in the design of anti-slide pile support, the present invention provides a landslide support system based on inclined anti-slide piles, a calculation method for landslide thrust, a method for optimizing the inclination angle and Construction method

Method used

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  • Landslide support system based on inclined anti-slide pile, landslide thrust calculation method, inclination angle optimization method and construction method
  • Landslide support system based on inclined anti-slide pile, landslide thrust calculation method, inclination angle optimization method and construction method
  • Landslide support system based on inclined anti-slide pile, landslide thrust calculation method, inclination angle optimization method and construction method

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Effect test

Embodiment 1

[0064] Such as Figure 1 ~ Figure 2 As shown, the landslide support system based on inclined anti-slide piles includes an anti-slide pile 1 whose pile body is inclined to the slope of the landslide, and several anchor rods 2 are arranged on the soil in front of the pile of the anti-slide pile 1, and the anchors The rod 2 runs through the anti-slide pile 1 and forms a pile rear anchor head 4 behind the pile of the anti-slide pile, and all the anchor rods 2 on the soil in front of the pile are connected by a frame beam 3 .

[0065] The anti-sliding pile is a bored and bottom-enlarged cast-in-place pile.

[0066] In this embodiment, the anchor rod 2, the frame beam 3 and the inclined anti-sliding pile 1 form an optimized arrangement of the overall anti-sliding system, which is used to reinforce the soil in front of the pile and prevent the formation and sliding of the sliding surface in front of the pile; the anti-sliding pile 1 The pile body inclines to the slope at a certain a...

Embodiment 2

[0070] The landslide thrust calculation method based on the landslide support system of inclined anti-slide piles, the calculation method of the landslide body active force at described anti-slide pile 1 position, comprises the following steps:

[0071] The landslide is divided into a number of vertical soil strips by the slice method, and the vertical soil strips are recorded as blocks, and the number of blocks is 1-m;

[0072] Take the ith block, where 1≤i≤m, the first block is the top block, and the mth block is the foot block; multiply the area of ​​the block by the soil weight to get bar weight W i , W i Represents the weight of the i-th bar;

[0073] Calculate the remaining sliding force F of the i-th bar i , F i The direction of action is the same as that of the sliding surface of the i-th bar, that is, the angle between the sliding surface of the i-th bar and the horizontal plane is α i ;

[0074] First, assume a F s value, calculated from the top of the slope, ...

Embodiment 3

[0081] Such as image 3 As shown, the anti-slide piles 1 are laid out at different locations, and the magnitude and direction of the landslide thrust are different. Then, according to the landslide thrust and the inclination angle of the pile position, the anti-slide pile 1 can be optimized and the combination of multiple rows of inclined anti-slide piles can be set. For most landslides, the inclination angle of the sliding surface changes from steep to slope angle from the top of the slope to the slope angle. Therefore, as the distance between the anti-slide pile 1 and the top of the slope increases, the anti-slide pile inclination angle β 1 2 3 , so that while reducing the pile length as much as possible, the axial component of the sliding force at each position along the direction of the pile body increases, and the vertical bearing capacity of the bored and bottom-enlarged cast-in-place pile is fully utilized.

[0082] Such as Figure 4As shown, the inclination angle opti...

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Abstract

The invention provides a landslide support system based on an inclined anti-slide pile. The landslide support system comprises an anti-slide pile (1), wherein a pile body of the anti-slide pile (1) is inclined towards a landslide surface, a plurality of anchor rods (2) are arranged on a soil body in front of the anti-slide pile (1), the anchor rods (2) penetrate through the anti-slide pile (1) and form a pile-post anchor head (4) behind the anti-slide pile (1), and all the anchor rods (2) which are located on the soil body in front of the pile are connected through frame beams (3). The invention further provides a landslide thrust calculation method, an inclination angle optimization method and a construction method of the landslide support system based on the inclined anti-slide pile. The support system gives full play to the vertical bearing capacity of an under-reamed bored pile, the bending moment and shearing force of the pile body are reduced, the use number of reinforcing bars of the anti-slide pile is reduced, the material cost is reduced, and the construction cost is reduced; and the calculation method is simple and easy to calculate, and a basis can be provided for the support design of the inclined anti-slide pile and the guidance of the construction of the inclined anti-slide pile.

Description

technical field [0001] The invention relates to a landslide support system based on inclined anti-slide piles, a landslide thrust calculation method, an inclination angle optimization method and a construction method, and belongs to the technical field of slope control. Background technique [0002] Slopes are natural or man-made slopes. With the rapid development of highway construction in my country, slope engineering is very common along highways in mountainous areas, and more and more attention has been paid to its support forms and stability analysis. However, landslide disasters occur from time to time. Serious landslide disasters not only cause loss of people's lives and property, but also have a very negative impact on the normal operation of railways, highways and other infrastructure. [0003] In slope treatment support, anti-slide pile support form is widely used, and more and more researchers study the design of anti-slide pile support. The anti-slide piles pass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20E02D5/76G06F30/13G06F119/14
CPCE02D5/76E02D17/207G06F30/13G06F2119/14
Inventor 宋健谢华威陆朱汐高玉峰姬建张飞丰土根张箭
Owner HOHAI UNIV
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