Pre-disintegration soft rock embankment grouting anti-seepage lifting structure and construction method thereof

A soft rock and embankment technology, applied in the field of pre-disintegrating soft rock embankment grouting anti-seepage lifting structure and its construction, can solve problems such as increased maintenance costs and engineering quantities, restrictions on the application of soft rock fillers, and affecting driver comfort , to achieve the effects of improving utilization rate, preventing uneven settlement, improving overall stability and local stability

Active Publication Date: 2022-03-08
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]2. Under the influence of wetting and dynamic load, the soft rock embankment will undergo relatively large settlement, and the resulting settlement mainly occurs in the middle and upper parts, and appears to be in the middle The tendency of contraction, which leads to a variety of disease problems on the road, affects the durability of the road
The settlement of soft rock embankment will lead to wavy and cracked road surface, reduce the durability of the road, and affect the comfort of drivers. The current improvement measures will also increase the maintenance cost and engineering quantity of the road after it is put into use. Applications in engineering are limited

Method used

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  • Pre-disintegration soft rock embankment grouting anti-seepage lifting structure and construction method thereof
  • Pre-disintegration soft rock embankment grouting anti-seepage lifting structure and construction method thereof
  • Pre-disintegration soft rock embankment grouting anti-seepage lifting structure and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A pre-disintegrated soft rock embankment grouting anti-seepage lifting structure, such as Figure 1-2 shown, including:

[0044] The single-graded crushed stone layer 7 is laid on the bottom of the roadbed. The thickness of the single-graded crushed stone layer 7 is 50cm-100cm. It is used as a road bed to bear the upper load, and at the same time prevents the bottom groundwater from immersing into the soft rock filler layer 3, resulting in Wetting deformation causes uneven settlement of the road surface.

[0045]The soft rock filler layer 3 is laid layer by layer above the single graded crushed stone layer 7, the thickness of each layer of the soft rock filler layer 3 is 40~60cm, and each layer of soft rock filler layer 3 is excavated at a distance of 130~150cm from the edge of the embankment There is a first longitudinal reserved pouring pipe groove 2, and the first longitudinal reserved pouring pipe groove 2 is 30-50 cm wide and 30-50 cm high. An uplifted layer 9 is...

Embodiment 2

[0051] A construction method for grouting anti-seepage lifting structure of pre-disintegrating soft rock embankment, specifically carried out according to the following steps:

[0052] S1: laying a single graded crushed stone layer 7 at the bottom of the roadbed;

[0053] S2: Using the direct filling method, the soft rock filler is directly layered and compacted on the single-graded crushed stone layer 7 to form the soft rock filler layer 3, and the thickness of each layer of the rammed soft rock filler layer 3 is 50cm . The soft rock filler soil layer 3 serves as the main load-bearing structure of the subgrade, and bears the upper load and the vehicle load on the road surface. Considering the influence of rainfall and other climatic factors, the embankment side slope has a large wetting deformation problem, the thickness of the soft rock filler soil layer 3 can be appropriately reduced, and appropriate measures should be taken at the embankment side slope to repair the emban...

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Abstract

The invention discloses a pre-disintegration soft rock embankment grouting anti-seepage lifting structure and a construction method thereof.The grouting anti-seepage lifting structure comprises a single graded broken stone layer, a soft rock filler layer and a clay layer, the soft rock filler layer is laid above the single graded broken stone layer in a layered mode, and a lifting layer is laid in the soft rock filler layer of a certain layer below a roadbed working area; the lifting layer comprises a plurality of second longitudinal reserved pouring pipe grooves and transverse reserved pouring pipe grooves, the transverse reserved pouring pipe grooves and the second longitudinal reserved pouring pipe grooves are perpendicular to each other and are communicated with each other, and pouring pipes are embedded in the transverse reserved pouring pipe grooves and the second longitudinal reserved pouring pipe grooves. All the pouring pipes in the lifting layer are wrapped in the double-layer geomembrane; the clay layer is laid on the top of the uppermost soft rock filler layer to reach the pavement elevation. The non-uniform settlement deformation of the roadbed is prevented, the overall performance of the soft rock filler embankment is improved, the construction is simple and rapid, and the engineering construction maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of road prevention and control, and relates to a pre-disintegrating soft rock embankment grouting anti-seepage lifting structure and a construction method thereof. Background technique [0002] According to investigations, a large number of pre-disintegrated soft rocks are distributed in southern my country. Soft rocks are low in mechanical strength, easy to soften when exposed to water, and prone to compression deformation under external loads. They have certain expansibility, disintegration and wettability. Rocks with chemical deformation properties. [0003] In order to reduce the transportation cost of roadbed filling materials and reduce the damage to the surrounding environment of roads, most of the mountainous roads built in my country, especially roads with large fill volumes, use local materials and excavated area soil as the main roadbed filling materials. However, according to investigations, most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E01C3/06
CPCE01C3/00E01C3/04E01C3/06
Inventor 邱祥凡晓明姬云鹏陈长睿李林殷意翔李锦鸿付思妮姚杰蒋煌斌刘忠伟肖泽林罗震宇胡红波
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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