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Construction method for excavating box-shape structure over an operating tunnel

A construction method and tunnel technology, applied in infrastructure engineering, excavation, soil protection, etc., can solve problems such as the inability to guarantee the normal operation of tunnels

Active Publication Date: 2006-09-27
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for constructing a new box-shaped structure above the tunnel in operation by excavating in sections, which can overcome the problem that the existing tunnel cannot be guaranteed during the construction of a new box-shaped structure in the prior art. lack of normal operation

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  • Construction method for excavating box-shape structure over an operating tunnel
  • Construction method for excavating box-shape structure over an operating tunnel
  • Construction method for excavating box-shape structure over an operating tunnel

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] The present invention mainly includes a box-shaped foundation pit arranged above the tunnel, and is characterized in that: the construction method includes the following steps: a. The box-shaped structure to be excavated is composed of a bottom plate, a middle plate, a top plate and a side wall , the retaining wall 2 parallel to the tunnel 3 is set at the edge of the foundation pit earlier, the retaining wall 1 perpendicular to the tunnel is set in the foundation pit, the retaining wall 2 and the retaining wall 1 vertically intersect and the soil above the tunnel is divided into I Zone, Zone II and Zone III; b. Reinforce the soil around the tunnel 3; c. Excavate the soil in Zone I and Zone III to the position of the bottom plate and set up steel supports, and then construct the bottom plate. Pre-buried in the bottom slab, followed by construction...

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Abstract

The invention relates to a method for constructing the box above the tunnel, which is characterized in that: arranging protective walls 1 and 2 at the basic hole which can divide the soil above the tunnel into three sections as I, II, and III; then strengthening the soil around the tunnel; digging at I and III sections to bottom plate and arranging steel support, then processing the bottom plate, middle plate, side plate and side wall, with keeping the steep support; in II section, digging the soil to the bottom plate and arranging steel support, and connecting the bottom plate to the bottom plates of I and III sections; removing the first support of II section, and removing part of protective wall 1, and processing the top plate of II section; removing the second support of II section, and part of protective wall 1, processing the middle plate of II section; removing the third support, removing left protective wall 1, and filling soil into ground. The invention can quickly construct a new box structure above the tunnel without affecting the normal operation of tunnel.

Description

Technical field: [0001] The invention relates to the technical field of underground engineering construction, in particular to a construction method for constructing a box-shaped structure above a tunnel in operation by excavating in sections. Background technique: [0002] In recent years, as Shanghai has paid more and more attention to underground space resources, building tunnels has become an effective form of using underground space to improve ground transportation. It plays a very significant role in improving land use efficiency, alleviating ground traffic, improving human living environment, realizing three-dimensional separation of people and vehicles, reducing environmental pollution, and maintaining urban historical and cultural landscapes. But underground space in cities is limited. Due to the lack of comprehensive planning for the development of underground space in Shanghai in the past, the underground space in the bustling central area is very crowded, and th...

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Application Information

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IPC IPC(8): E02D17/02E02D17/04E02D27/32E02D3/12
Inventor 王海燕潘松林
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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