Construction process of foam concrete light roadbed above subway tunnel

A foamed concrete and construction technology technology, applied in the direction of roads, roads, buildings, etc., can solve the problems of running subway shield tunnels, such as interval loss, high risk, and strict construction control requirements.

Inactive Publication Date: 2021-02-02
SUZHOU ZHONGHENGTONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the construction control requirements for the construction of foam concrete light subgrade above the subway shield tunnel are very strict, and the risk is huge. Once out of control, it will cause irreparable losses to the subway shield tunnel section.

Method used

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  • Construction process of foam concrete light roadbed above subway tunnel
  • Construction process of foam concrete light roadbed above subway tunnel

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0029] refer to Figure 1-2 Shown, a kind of foam concrete lightweight subgrade construction technology above the subway tunnel comprises the following steps;

[0030] S1: Excavate the construction subgrade, and preset the filling area; the excavation depth of the filling area is determined by the actual road conditions of the subgrade, and is obtained through the simulation calculation of the research institute;

[0031] S2: Clean and level the base of the filling area to ensure that the base is flat and free of water and debris at the bottom; before construction of the lightweight foam concrete subgrade, the foundation pit must be smooth and free of water, and the ...

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Abstract

The invention discloses a construction process of a foam concrete light roadbed above a subway tunnel. The method comprises the steps that S1, a construction roadbed is excavated, and a filling area is preset; S2, a base of the filling area is cleaned and leveled; S3, graded broken stone is laid; S4, formwork erecting and bin dividing are carried out ; S5, a first layer of foam concrete is poured;S6, a reinforcing mesh is laid; S7, a next layer of foam concrete is poured; S8, a next layer of reinforcing mesh is laid; S9, the last layer of foam concrete is poured; and S10, water is sprayed formaintenance. By means of the construction process, the additional stress generated by rail-related section roadbed filling on the running subway shield tunnel is smaller than the numerical value required by the rail department, the safety of roadbed construction above the running subway shield tunnel is improved, and compared with traditional lime soil roadbed construction, the construction operation period is greatly shortened, and the additional stress generated by roadbed filling on the running subway shield tunnel is reduced.

Description

technical field [0001] The invention relates to the technical field of construction of a lightweight subgrade above a subway shield tunnel, in particular to a construction process for a lightweight subgrade of foam concrete above a subway tunnel. Background technique [0002] Compared with ground structures, the engineering safety problems of underground structures are more hidden and more difficult to repair, which makes the construction of related projects close to the operating subway shield tunnels strictly controlled and restricted. At the same time, as the demand for urban ground transportation continues to grow, the level of urban roads continues to improve, and the road network is becoming more and more dense. Therefore, there will be more and more road sections overlapping with the subway shield tunnel. The load of the conventional road structure layer often exceeds the load of the original covering soil, which will generate additional stress on the operating subway...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 陆慧峰孙瑞瑞张尉斌郁伟强徐汇潘小军刘海宁朱黎明
Owner SUZHOU ZHONGHENGTONG ROAD & BRIDGE GRP CO LTD
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