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Construction method of long open-cut tunnel

A construction method, technology of open-cut tunnels, applied in excavation, tunnel, tunnel lining, etc., can solve the problems of short-length open-cut tunnels and lack of construction techniques for long-scale and large-scale open-cut tunnels, so as to improve the efficiency of steel bar binding and facilitate Promotion, the effect of accurate steel bar size

Active Publication Date: 2011-01-26
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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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 the features disclosed in this specification, or all disclosed methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any manner.

[0024] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless specifically stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.

[0025] A construction method of a long and large open-cut tunnel adopts the following steps:

[0026] 1) Prepare construction equipment

[0027] Construction equipment is mainly divided into four categories: earth excavation and backfilling, steel bar processing and installation, concrete mixing and pouring, and formwork trolleys. Earth-moving construction machinery includes excavators, transport vehicles, loaders, bulldozers, road rollers, etc.; steel bar equipmen...

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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 topopularize, 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 and large open-cut tunnel. Background technique [0002] With the rapid development of high-speed railway construction, the progress of engineering design and construction technology, the continuous improvement of railway grades and the increasingly restricted construction conditions. Restricted by special conditions, long and large open-cut tunnels have emerged as an important structural form. [0003] At present, open-cut tunnels are generally short in length and are mainly distributed in the entrance and exit and geologically complex places. The construction method is basically that the inner form trolley is equipped with small formwork (as the outer form) for construction; there is no mature growth Construction technology of large-scale open-cut tunnels. Summary of the invention [0004] In order to overcome the above-mentioned shortcomi...

Claims

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Application Information

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Patent Type & Authority Patents(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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