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Rapid construction method for underground excavation section of subway station entrance and exit in rocky strata

A technology for subway stations and construction methods, applied to earthwork drilling, mining equipment, tunnels, etc., can solve problems such as low efficiency, high risk, and difficult control of tunnel contours, and achieve reduced blasting vibration, reduced explosives, and reduced impact Effect

Active Publication Date: 2019-03-26
CRRC CONSTR ENG CO LTD
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Problems solved by technology

[0005] The invention aims to overcome the problems of high risk and low efficiency in the process of excavating slag from the open excavation section to the station in the traditional rock formation underground excavation construction method of the underground excavation section at the entrance and exit of the subway station and the problem that the excavation process from the station to the open excavation section The problem that the contour of the excavation tunnel is not easy to control, to ensure the construction safety, construction progress and construction quality

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  • Rapid construction method for underground excavation section of subway station entrance and exit in rocky strata
  • Rapid construction method for underground excavation section of subway station entrance and exit in rocky strata
  • Rapid construction method for underground excavation section of subway station entrance and exit in rocky strata

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Embodiment Construction

[0029] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0030] A rapid construction method for excavating the entrance and exit of a subway station in a rocky stratum, comprising the following steps:

[0031] Step 1: after the excavation of the foundation pit support 6 of the open excavation section at the entrance and exit of the subway station is completed, the tunnel 2 of the connecting section between the station and the entrance and exit is excavated from the subway station 1 to the direction of the station entrance and exit 3, and the initial support of the tunnel 2 of the connecting section is constructed at the same time protect.

[0032] Step 2: According to the advanced support form and support parameters determined by the surrounding rock grade and nature of the tunnel surrounding rock in the open cut section near the station entrance and exit, at the interface between the open cut section and the u...

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Abstract

The invention discloses a rapid construction method for a subsurface section of a passageway of a subsurface subway station in a rock stratum. The rapid construction method comprises the following steps: taking a small-cross-section inclined pilot tunnel which is constructed in advance and connects an open excavation section to a station as a slag discharge channel; constructing a subsurface section from the open excavation section to the subway station; conveying residue soil generated in an operation process of the subsurface section into the slag discharge channel by using an excavator or a forklift; conveying the residue soil to a tunnel position of a connection section between the station and the passageway by great gradient of the slag discharge channel; and conveying the residue soil to the ground via a station construction channel by a slag car. The problems are solved that in the traditional method for constructing the subsurface section of the passageway of the subsurface subway station in the rock stratum, risks are high and the efficiency is low in a process of excavating from the open excavation section to the station and discharging slag, and the profile cannot be controlled easily when a tunnel is excavated from the station to the open excavation section; construction safety, construction progress and construction quality are guaranteed.

Description

technical field [0001] The patent of the invention belongs to the technical field of urban rail transit engineering construction, and specifically relates to a rapid construction method for underground excavation sections of subway station entrances and exits in rocky strata. Background technique [0002] With the rapid development of cities in our country, the traffic congestion in large and medium-sized cities has become increasingly congested, seriously affecting the quality of life of urban residents. Accelerating the construction of urban rail transit projects has become the consensus of more and more cities. As an important part of urban rail transit projects, underground excavated subway stations are widely used in central urban areas where there are many traffic flows and pipelines due to their advantages of not affecting ground transportation and less relocation and modification of pipelines. [0003] Since the underground underground subway station is located withi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/12
CPCE21D9/006E21D9/12
Inventor 王猛郭金成冀文有苏宏伟王振永
Owner CRRC CONSTR ENG CO LTD
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