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Expansive soil cutting semi-rigid top retaining wall design and construction method

A semi-rigid and retaining wall technology, applied in excavation, artificial islands, water conservancy projects, etc., can solve the problems of large environmental damage, large section size, and inability to meet the functions of expansive soil embankment slope support, and achieve significant economic benefits , economical and practical effect

Inactive Publication Date: 2017-04-19
THE FOURTH ENG CO LTD OF CCCC FIRST HIGHWAY ENG +1
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  • Application Information

AI Technical Summary

Problems solved by technology

According to the characteristics of expansive soil water absorption expansion, dehydration shrinkage and repeated action, the strong support with rigid structure can no longer meet the function of expansive soil embankment slope support
The flexible upper retaining wall is a relatively common method currently used, but due to the large section size of the structural design, the excavation volume is also large, and the damage to the environment is large, which does not meet the current low-carbon environmental protection and energy-saving. social needs

Method used

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  • Expansive soil cutting semi-rigid top retaining wall design and construction method
  • Expansive soil cutting semi-rigid top retaining wall design and construction method

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Embodiment Construction

[0026] The semi-rigid upper retaining wall structure of the present invention is mainly composed of a rigid retaining wall structure 1 , a flexible gravel cushion 2 and a drain hole 3 .

[0027] A new type of semi-rigid upper retaining wall design and construction method for expansive soil cuts, mainly relying on the rigid retaining wall structure 1 for main support and reinforcement, and the flexible crushed stone cushion 2 is located behind the rigid retaining wall structure 1 and is in contact with the roadbed slope The drain hole 3 is located on the rigid retaining wall structure 1 with a horizontal distance of 2-3m and is arranged vertically in layers, mainly for drainage.

[0028] The specific construction method steps are as follows:

[0029] (1) The rigid retaining wall structure 1 shall be constructed first, and the flexible crushed stone structure 2 shall be constructed when the strength of the rigid retaining wall structure 1 reaches more than 85% of the design stre...

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Abstract

The invention provides a novel expansive soil cutting semi-rigid top retaining wall design and construction method. A semi-rigid top retaining wall is formed by a rigid retaining wall and a flexible hardcore in a combined manner and used for protecting an expansive soil roadbed slope, the flexible hardcore structure is arranged on the inner side of the rigid retaining wall, and drainage holes are formed in the rigid retaining wall. Mortar rubble or rubble concrete or plain concrete can be adopted for the expansive soil cutting top retaining wall structure, local special zones can be designed to be of a reinforced concrete structure, and the flexible hardcore is added behind the retaining wall to be used for absorbing and digesting certain expansive deformation which happens when an expansive soil cutting slope meets water, and guaranteeing the stability of the cutting slope.

Description

technical field [0001] The invention relates to a design and construction method of a semi-rigid upper retaining wall of an expansive soil road cutting. Background technique [0002] The harm of expansive soil to roadbeds and slopes has always been called cancer in the engineering field, but in nature and in the natural state, we generally do not find the disease of expansive soil. In fact, in the natural state of nature, expansive soil diseases have always existed, but After a long period of time, a relatively balanced relationship has been formed. Once roads and bridges are built in the expansive land zone, slopes will be excavated, embankments will be filled, foundation pits will be excavated, and the original water system will be changed. , land system, destroying the original natural balance. Therefore, the engineering community should pay enough attention to this, and must help it establish a new balance state through engineering measures and the principle of natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/02E02D17/20
CPCE02D17/20E02D29/02
Inventor 田世宽张强冯燕平
Owner THE FOURTH ENG CO LTD OF CCCC FIRST HIGHWAY ENG
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