Construction method of long open-cut tunnel

A construction method and technology for open-cut tunnels, which are applied in excavation, tunnels, tunnel linings, etc., can solve the problems of the lack of long and large-scale open-cut tunnel construction technology and the short length of open-cut tunnels. Promote and enhance the effect of construction quality

Active Publication Date: 2010-06-09
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, open-cut tunnels are generally short in length, and are mainly distributed in entrances and exits and geologically complex places. The construction method is basically that the inner formwork trolley is equipped with a small formwork (as an outer formwork) for construction; there is no mature growth method. Construction technology of large-scale open-cut tunnels

Method used

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Embodiment Construction

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0025] A construction method for a long and open cut tunnel, adopting the following steps:

[0026] 1) Prepare construction equipment

[0027] Construction equipment is mainly divided into four categories: earthwork excavation and backfilling, steel bar processing and installation, concrete mixing and pouring, and formwork trolleys. Earthwork construction machinery includes excavators, transport vehicles, loaders, bulldozers, road rollers, e...

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Abstract

The invention discloses a construction method of a long open-cut tunnel, comprising the following steps of: after reducing ground water level by utilizing precipitation of a tube well, carrying out the slope excavation to be the designed height, sequentially constructing a bed course, waterproof roll and inverted arch and filling, carrying out secondary lining by using inner and outer mould trolleys, constructing external coverage and waterproof engineering, back-filling and compacting. The invention has the advantages that: the construction method has strong scene maneuverability, is easy to popularize, ensures the construction safety, and improves the construction quality of the long open-cut tunnel.

Description

technical field [0001] The invention relates to a construction method of an open-cut tunnel, in particular to a construction method of a long-length open-cut tunnel. Background technique [0002] With the rapid development of high-speed railway construction and the advancement of engineering design and construction technology, the level of railways has been continuously improved, and construction conditions have become more and more restricted. Restricted by special conditions, long and open cut tunnels, as an important structural form, emerged as the times require. [0003] At present, open-cut tunnels are generally short in length, and are mainly distributed in entrances and exits and geologically complex places. The construction method is basically that the inner formwork trolley is equipped with a small formwork (as an outer formwork) for construction; there is no mature growth method. Construction technology of large-scale open-cut tunnels. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/00E02D19/20E02D1/02E21D11/10E21D11/38E04G21/08E02D17/18
Inventor 罗久旭陈拥军罗飚陈登云李远禄谢方成
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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