Construction Method of Upside-Down Shaft Wall in Open-cut Trench in Central Area of ​​City

Abstract

The invention relates to the technical field of groove construction, and discloses a construction method of an inverted side wall of an open excavation groove in an urban center. The method comprises the following steps that 1, a temporary steel bridge is constructed, particularly, temporary steel bridge foundations are arranged on the outer sides of the edges of the groove to be constructed correspondingly, and a supporting beam, damping rubber and a steel plate are sequentially laid on the temporary steel bridge foundations; 2, integral crown beam construction is carried out, and particularly a reinforced concrete diagonal brace and a crown beam are integrally poured and formed; 3, groove open excavation construction is carried out, particularly, in the groove direct motion direction, a circulation excavation step method in a front-rear staggered and left-right staggered mode is adopted for groove excavation, a temporary support is excavated at any time, and the inner wall of the groove is supported by a horizontal grate steel frame, a temporary support, an advanced small pipe and sprayed concrete; 4, groove bottom sealing construction is carried out; and 5, the temporary support is detached. The construction method is convenient and fast to implement, low in cost, high in construction efficiency, capable of effectively protecting underground pipelines, small in influences on traffic and environment in the construction process and suitable for long-distance groove construction.

Description

technical field [0001] The invention relates to the technical field of trench construction, in particular to an upside-down shaft wall construction method for open-cut trenches in central urban areas. Background technique [0002] At present, when solving the construction of long-distance trenches (structures and pipe corridors) in urban central areas in China, the main support measures include the following methods: First, the construction technology of shallow burial and underground excavation can effectively reduce the impact of construction on the surrounding environment , but the construction cost is high, the cycle is long, there are certain requirements for the construction structure covering soil, and the application is relatively limited; the second is the construction technology of bored pile foundation support, which needs to block traffic during the construction process, which will cause great damage to underground pipelines , and the construction has high requir...

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Problems solved by technology

[0004] The technical problem to be solved is: the existing long-distance trench construction method is high in cost and low in efficiency, which has a great impact on traffic and the environment, and has high requirements for the covering soil of the construction structure, and the underground pipeline is easily damaged during the construction process.

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