Construction method for CRD (center cross diaphragm) inverted arch

A construction method, I-beam technology, applied in earthwork drilling, shaft lining, tunnel lining, etc., to achieve the effects of reducing construction costs, avoiding frequent conversions, and high safety

Inactive Publication Date: 2014-12-10
SUBWAY ENG CO LTD OF CHINA RAILWAY 16TH CONSTR BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of CRD inverted arch construction method, has satisfied the construction process design requirement, has solved the above-mentioned deficiency in the existing CRD construction method

Method used

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Experimental program
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Embodiment Construction

[0015] A kind of CRD inverted arch construction method described in the embodiment of the present invention, comprises the following steps:

[0016] 1) Set temporary steel support: the temporary steel support is replaced by I-beam 22a in the middle partition, and the distance between the temporary steel support is 2.0m;

[0017] 2) Remove the middle partition near the temporary steel support: remove the middle partition near the temporary steel support with a width of 1.0m and below the outline of the inverted arch, and cut off the steel body within the range of 80-100mm at the bottom of the I-beam;

[0018] 3) Apply leveling layer, waterproof layer and protective layer on the bottom surface of the temporary steel support: apply a leveling layer, waterproof layer and 60mm thick fine stone concrete protective layer in the scope of the temporary steel support 80cm×80cm;

[0019] 4) Applying prestress: place a steel plate with a size of 300mm×300mm×10mm on the bottom surface of t...

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Abstract

The invention discloses a construction method for a CRD (center cross diaphragm) inverted arch. The construction method comprises the following steps: 1), installing a temporary steel support; 2), breaking a center cross diaphragm near the temporary steel support; 3), constructing a bottom levelling layer, a waterproof layer and a protective layer for the temporary steel support; 4), applying pre-stress; and 5), constructing the inverted arch: breaking the rest center cross diaphragm, constructing a levelling layer, a waterproof layer and a protective layer, applying reinforcement, mould boards and concrete, using concrete of the same grade to backfill the middle part of the concrete inverted arch, and simultaneously pouring 30cm-high concrete on the two side walls. The construction method has the advantages of reducing structural construction seams, avoiding frequent conversion between processes, achieving strong structural integrity, completely sealing the waterproof layer and effectively controlling land subsidence; moreover, the method is simple to operate and has strong stability in an initial supporting structure and high safety, thereby improving the project quality, accelerating the construction progress and reducing construction cost.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a construction method of a CRD (cross-middle partition) inverted arch. Background technique [0002] The section of the Anhuaqiao Station of Beijing Metro Line 8 that crosses the main road of the North Third Ring Road is 64m long. The tunnel on the right line is constructed using the existing CRD (cross middle partition) method. The excavation section is 9.7m wide, 9.9m high, and the covering soil is thick 11m, the soil is soft, the ground traffic is heavy, the underground pipelines are densely distributed, and the terrain is dangerous; the original design plan divided the bottom plate, side wall, and arch ring into four linings, and the lining was destroyed while the lining was broken, and each cycle was 4m. , Steel bars, and concrete joints are many, which affects the quality of the project; frequent process changes, labor, materials, and long construction periods; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/38
Inventor 戴兴民马栋董贤顺陈建汪春生郭建国许省会郭保飞
Owner SUBWAY ENG CO LTD OF CHINA RAILWAY 16TH CONSTR BUREAU
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