Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel

A shield tunneling and construction method technology, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of many non-propelling operations in subway stations, expansion of a single shield tunnel, and low efficiency of shield equipment, and reach the surrounding The effects of small environmental impact, removal of potential safety hazards, and reliable and easy construction methods

Inactive Publication Date: 2015-11-11
BEIJING UNIV OF TECH
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Problems solved by technology

The present invention is mainly used to solve the construction of section shield tunnel (referring to the shield equipment used for subway section tunnels with a diameter of about 6m, and the single shield tunnel fo

Method used

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  • Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel
  • Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel
  • Underground excavation construction method for expanded excavation of station on basis of metro regional shield tunnel

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Embodiment Construction

[0021] like Figure 1-18 Shown, the implementation example of a shallow buried double-span subway station under a city road of the present invention, the present invention adopts a kind of construction method of enlarging and excavating the station on the basis of the shield tunnel in the subway section, and its main structure is made of cast-in-place steel bars Concrete floor 10, middle slab 23, station top structure (arched steel grid 20, secondary lining 21), station hall side wall 22, platform layer side wall 25, wall column 5, shield segment 4, wall column It is composed of transverse support beams 24 and concrete-filled steel tube columns 18 (its structural composition is as follows figure 1 As shown), the thickness of the top covering soil of the structure is 5.5m, and the excavation section size is 12m×20.5m. In conjunction with the accompanying drawings, the construction steps of the present invention will be further specifically described.

[0022] A method of subm...

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Abstract

The invention relates to an underground excavation construction method for expanded excavation of a station on the basis of a metro regional shield tunnel. The structural form of the station formed through expanded excavation is a simple support framework wall column type double-layer metro station; piles in a row and a water stop heavy curtain or an underground continuous wall are used for blocking soil and water, and the lateral deformation of soil bodies is resisted; soil bodies between openings of parallel shield tunnel duct pieces are excavated, and a transverse passage is constructed; uplift piles, wall columns, a bottom plate, a middle upright post foundation and transverse support beams arranged between the wall columns are constructed in the transverse passage; the bottom plate is connected with the bottom of each wall column; the soil body above the tunnel is subjected to grouting reinforcement; an underground excavation reverse operation method is adopted for constructing the station main body structure; the station main body can be entered through a vertical shaft or the transverse passage built at an entrance and exit; and a small guide holes and the station top structure are constructed. The problem of low use efficiency of shield equipment is solved. The method has the advantages that huge economic benefits, social benefits and environmental benefits are brought; and important engineering application values and development prospects are realized.

Description

technical field [0001] The invention relates to a structure for excavating a station on the basis of a shield tunnel in a subway section and a construction method for underground excavation, and belongs to the technical field of rail transit construction. Background technique [0002] Among the many subway construction methods, the "shield tunneling method" has been more and more widely used in subway construction because of its high construction safety, fast construction speed, and relatively small impact on the surrounding environment. However, in the past construction of the interval shield method in China, the use of shields was limited to the construction of interval tunnels with a simple and single cross-section. The current shield well is hoisted out, then transferred to another shield well, and then the shield machine is reassembled for construction; or the station is expanded and excavated in advance to expand the width and bottom of the station, and then the shield...

Claims

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Application Information

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IPC IPC(8): E21D13/02E21D11/00
Inventor 张明聚刘义
Owner BEIJING UNIV OF TECH
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