Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation

A technology for shield tunneling and construction methods, which is applied in infrastructure engineering, excavation, tunnels, etc., and can solve problems such as low efficiency of shield equipment, many non-propelling operations in subway stations, and expansion of a single shield tunnel, and achieve the goal of construction method Reliable and easy to implement, improve construction efficiency, and remove potential safety hazards

Inactive Publication Date: 2015-11-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is mainly used to solve the construction of tunnel extension subway stations under the current conditions of the tunnel extension (the diameter of the shield equipment used for subway interval tunnels is about 6m, and it

Method used

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  • Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation
  • Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation
  • Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation

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Example Embodiment

[0021] Such as Figure 1-15 As shown, an implementation example of a shallow-buried double-deck two-span subway station under an urban road of the present invention adopts the open-cut construction method of the present invention for expanding the station on the basis of the shield tunnel of the subway section, and its main structure It is composed of cast-in-place reinforced concrete bottom plate 10, middle plate 19, top plate 22, bottom side wall 18, upper side wall 20, wall column 5, shield segment 4, transverse support beam 17, bottom bottom center column 16, and top center column 21 (Its structure is as figure 1 Shown), the thickness of the top cover of the structure is 5.5m, and the size of the excavation section is 12m×20.5m. With reference to the drawings, the construction steps of the present invention will be further described in detail.

[0022] In this embodiment, the construction method of expanding and digging a subway station on the basis of a parallel section shi...

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Abstract

An open excavation construction method for expanding excavation of a station on a metro interzone shield tunnel foundation method includes the steps that uplift piles, wall columns, a base plate, a middle stand column foundation and transverse supporting beams between the wall columns are constructed in a transverse channel, wherein the base plate is connected with the bottoms of the wall columns, water prevention treatment is conducted, and the wall columns and duct pieces are connected, so that a sealed stress system is formed; soil over the tunnel is subjected to grouting reinforcement, an excavation retaining structure of a station body foundation bit is built, and the top end of the structure is connected with an external campshed or an underground diaphragm wall through a connection beam; slopes are supported through a composite soil nailing supporting technology, foot locking supports are erected at the pile foots, after excavation is conducted on the bottom of a foundation pit, residual duct pieces are removed, connection beams between the wall columns are constructed, and the connection beams are firmly connected with the duct pieces; the transverse support system is constructed. The method is reasonable, feasible and high in maneuverability. By means of application of the method, great economic benefits, social benefits and environmental benefits are achieved. The method has significant engineering application value and development prospects.

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 an open-cut construction method thereof, belonging 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 machine is...

Claims

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Application Information

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IPC IPC(8): E02D29/045E02D17/00E02D17/04E21D9/06
Inventor 张明聚刘义
Owner BEIJING UNIV OF TECH
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