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Cover plate bottom foundation pit backfill construction method during cover-excavation construction

A construction method and technology in construction, applied in the direction of excavation, filling, infrastructure engineering, etc., can solve the problems of backfill transportation and the impact of compaction construction, achieve good fluidity and self-solidification, convenient construction, and ensure construction. quality effect

Inactive Publication Date: 2019-04-30
ZHONGYIFENG CONSTR GRP
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  • Claims
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Problems solved by technology

Compared with the usual open pit backfill construction method, due to the limitation of backfill cavity height, with the increase of backfill height, earthwork construction machinery will not be able to enter under the cover plate for construction work, and the transportation and compaction of backfill will be difficult. Affected

Method used

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] A construction method for backfilling a foundation pit under a cover plate during cover excavation construction, comprising the following steps:

[0019] S1, construction preparation: the channel is cleaned first to remove the construction waste accumulated in the channel. Since the backfill used in the present invention has two kinds of plain concrete and foam concrete, it is necessary to install the supporting equipment after cleaning. The present invention The backfill is mainly transported through pipelines. After the cleaning is completed, the installation of the pump station needs to be completed first;

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Abstract

The invention discloses a cover plate bottom foundation pit backfill construction method during cover-excavation construction. The construction method comprises the following steps: S1, construction preparation; S2, survey mark; S3, retaining wall construction; S4, plain concrete construction; S5, foam concrete construction; S6, subsequent treatment. According to the construction method disclosedby the invention, backfilling is performed by adopting a construction method for taking plain concrete as basement and filling the cavity with the foam concrete, and due to combined use of the plain concrete and the foam concrete, the defects that the plain concrete is difficult in cover plate bottom backfill construction and the foam concrete is small in dead weight can be overcome; during construction, with the adoption of a construction manner of backfilling in separate warehouses on different layers, by matching with retaining walls, the construction method has the advantages of convenience in construction and excellent penetration resistance, filling compaction is realized, gaps are difficultly formed, and the cover plate bottom backfill construction quality is effectively ensured.

Description

technical field [0001] The invention belongs to the field of building construction, and more specifically relates to a construction method for backfilling a foundation pit under a cover plate during cover excavation construction. Background technique [0002] The cover excavation method is a common engineering construction method. After the ground is excavated to a certain depth, the top is closed, and the rest of the substructure is constructed under the closed top cover. The main structure can be done forward or reversed. In the process of road reconstruction, a combination of open cut and cover excavation is generally used. After the construction of the main structure of the channel is completed, since the construction area of ​​the cover-excavation method is the traffic road, the cover plate cannot be removed, so the backfilling operation below the cover plate must be carried out in the method of "hidden filling". Compared with the usual open pit backfill construction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02E02D17/18
CPCE02D17/02E02D17/18
Inventor 王圣康徐佳胤李晨乔治陈示光
Owner ZHONGYIFENG CONSTR GRP
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