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Construction method for full cover-excavation reverse method of underground engineering

A technology of underground engineering and construction method, which is applied in water conservancy projects, infrastructure engineering, artificial islands, etc., to achieve good waterproof effects, prevent seepage and water leakage, and ensure the quality of pouring

Inactive Publication Date: 2014-04-23
CHINA CONSTR SECOND ENG BUREAU LTD +1
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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a construction method of full cover excavation and reverse method of underground engineering, which can effectively solve the adverse effects of uneven settlement of underground enclosure structures on the quality of underground main structures, and can solve the problem of water seepage, Water leakage phenomenon, improve the overall quality of the project

Method used

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  • Construction method for full cover-excavation reverse method of underground engineering
  • Construction method for full cover-excavation reverse method of underground engineering
  • Construction method for full cover-excavation reverse method of underground engineering

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and embodiment the present invention will be further described, figure 1 It is an overall cross-sectional view of an underground civil air defense project. The civil air defense project is located under the main traffic road. This project has a total of two basement floors, 28 stair openings from the ground and 3 car entrances leading to the second-floor underground garage. The elevation of ±0.000 of this project is the elevation of the road surface. The elevation of the roof surface of the basement structure is designed to be -3~-4 meters, the elevation of the middle surface is designed to be -8.80m, and the elevation of the bottom surface is designed to be -12.7~-13.30 meters. 1. The inter-floor floor adopts the structural type of cast-in-place integrated reinforced concrete beamless floor and column cap. The floor and foundation adopt raft foundation. The supporting structure adopts 800mm thick underground continuous wall...

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Abstract

The invention discloses a construction method for a full cover-excavation reverse method of underground engineering. The construction method comprises the following construction steps of A, underground diaphragm wall construction; B, top plate construction for an underground main structure; C, road face recovery construction or construction of a structure above ground; D, first layer underground excavating construction; E, repetition of the step D till underground excavating construction of the lowest layer is completed. The construction method is characterized in that drainage construction is conducted on underground water by adopting a collected water surface draining method in the process of the step B, and it is ensured that the water level is 50cm or so below a foundation pit. Construction of the structure above the ground in the step C can be conducted at the same time with the steps D-E. The steps D-E are constructed under the covering of the top plate completed in the step B. Underground engineering construction is conducted by adopting the construction method, not only can a construction period be shortened, but also the problems of differential settlement, water seepage and water leakage can be effectively solved.

Description

technical field [0001] The invention relates to underground engineering construction in the civil engineering industry, in particular to an underground engineering full-cover excavation and reverse construction method. Background technique [0002] With the continuous development of municipal construction and other infrastructure construction, people pay more and more attention to the development and utilization of underground space. As a result, there are more and more underground construction projects in complex environments, and the difficulty of design and construction is also increasing. . At present, the construction of underground works mostly adopts two methods: forward method or reverse method. Since the construction of the sequential method is subject to many restrictions, mainly referring to the limitation of environmental conditions, if the construction site is a soft foundation or the foundation construction requirements are relatively deep, the sequential meth...

Claims

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Application Information

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IPC IPC(8): E02D29/045
Inventor 沈威王全逵丛坤李彦学
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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