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A method of underground excavation for station expansion on the basis of shield tunnels in subway intervals

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, low efficiency of shield equipment use, expansion of a single shield tunnel, etc., and reach the surrounding Small environmental impact, reliable and easy construction method, and the effect of removing potential safety hazards

Inactive Publication Date: 2017-07-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 formed by its excavation to expand the subway station) under the current conditions. There are too many propulsion operations in the middle and Africa, and the problem of low efficiency in the use of shield equipment

Method used

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  • A method of underground excavation for station expansion on the basis of shield tunnels in subway intervals
  • A method of underground excavation for station expansion on the basis of shield tunnels in subway intervals
  • A method of underground excavation for station expansion on the basis of shield tunnels in subway intervals

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Embodiment Construction

[0021] Such as 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 s...

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Abstract

A subterranean excavation construction method for expanding and excavating a station on the basis of a shield tunnel in a subway section. The structure of the station formed by the expanding and excavating is a simple-supported frame-wall-column double-deck subway station, which adopts row piles plus water-stop curtains or underground continuous The wall retains soil and water to resist the lateral deformation of the soil; excavates the soil between the openings of the parallel shield tunnel segments, and constructs the cross passage; constructs the uplift piles, wall columns, bottom plates, and neutral columns in the cross passage The foundation and the horizontal support beam between the wall columns, the bottom plate and the bottom of the wall column are connected; the soil above the tunnel is reinforced by grouting, and the main structure of the station is constructed by using the method of excavation and inversion. Construction of the small pilot tunnel and the roof structure of the station. The problem of inefficient use of shield equipment. The method will bring huge economic benefits, social benefits and environmental benefits, and has important engineering application value and development prospect.

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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Patent Type & Authority Patents(China)
IPC IPC(8): E21D13/02E21D11/00
Inventor 张明聚刘义
Owner BEIJING UNIV OF TECH
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