Urban station rock excavation construction technology

A construction technology and station technology, applied in excavation, artificial islands, water conservancy projects, etc., can solve problems such as large impact range and low construction efficiency, and achieve the effects of simple use, time-saving construction, and firm and reliable supporting structure.

Inactive Publication Date: 2019-04-19
中交(广州)建设有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to provide a stonework excavation construction technology for urban stations, so as to improve the problems of large influence range and low construction efficiency in traditional stonework excavation

Method used

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  • Urban station rock excavation construction technology

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Embodiment

[0045] see figure 1 , the present embodiment provides a stonework excavation construction technique for an urban station.

[0046] The construction process includes the following steps:

[0047] Step s100 , manufacturing the free surface. By making the air surface, the impact force generated inside the rock layer during the static blasting process is released from the air surface to improve safety. Optionally, a groove can be excavated on one side of the foundation pit, and the side wall of the groove close to the side of the foundation pit to be excavated is set as the free surface. The position of the groove is set on the side that has less impact on the external environment during the excavation of the foundation pit, so that the impact force released by the rock layer has less impact and the construction is safer. It should be noted that the shape of the groove is set as required, for example, the groove can be a rectangular groove or an arc groove, and the extending di...

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Abstract

The invention provides an urban station rock excavation construction technology which includes the steps: manufacturing a free face; performing initial excavation on a foundation pit by a static blasting construction technology; performing secondary excavation on the foundation pit after initial excavation in a mechanical mode. According to the construction technology, static blasting is combinedwith mechanical excavation, the shortcomings of low efficiency and long period of traditional mechanical excavation are overcome, large environmental problems of influence on surrounding buildings andresident safety and the like caused by open blasting are avoided, the construction technology is high in efficiency and safety, and construction cost is saved.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a stonework excavation construction technology for urban stations. Background technique [0002] The excavation of earth and rock in the foundation pit of urban rail transit stations is an important factor that determines the construction process of the main body of the station. [0003] Traditional subway stations are located in urban built-up areas, most of which are buried shallowly and the excavated strata are mainly miscellaneous fill soil, silty clay or strongly weathered rock, and the excavation method is mainly mechanical. [0004] The inventor found in the research that the traditional urban rail transit station has at least the following disadvantages in the construction process: [0005] During the excavation process, the excavation strata of the subway station exposed medium-slightly weathered rock formations, and the simple mechanical excavation method has lo...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D29/045F42D3/04F42D1/00
CPCE02D17/02E02D29/04F42D1/00F42D3/04
Inventor 石磊刘毅王传庆彭振李向阳石福龙磨卫俊施雄元
Owner 中交(广州)建设有限公司
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