The new subway tunnel crossing the existing tunnel structure and its construction method in the soft soil area
A technology with existing tunnels and construction methods, applied in infrastructure engineering, tunnels, earthwork drilling, etc., can solve problems such as large impact, and achieve the effect of reducing impact
Active Publication Date: 2022-05-03
江苏中车城市发展有限公司 +1
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Problems solved by technology
[0004] The invention provides a soft soil area that can reduce the impact on the existing tunnel when the newly-built subway shield tunnel traverses the existing tunnel structure, and solves the problem of building crossing the existing tunnel. Subway Tunnel Team's big problem affecting existing tunnels
Method used
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Embodiment 1
[0023] Embodiment one, see figure 1 and figure 2 A newly-built subway tunnel in a soft soil area traverses an existing tunnel structure, including an existing tunnel 1, a newly-built subway station 2, and two newly-built subway shield tunnels 3 connected to the newly-built subway station. The existing tunnel intersects with the new subway shield tunnel and staggers along the up and down direction. The pipe shed 4 at the intersection of the existing tunnel and the new subway shield tunnel. The pipe shed separates the existing tunnel from the new subway shield tunnel along the vertical direction. There are two existing tunnels, and each new subway shield tunnel is separated from the two existing tunnels by a pipe shed. The pipe shed includes several main steel pipes 5 extending along the extension direction of the newly-built subway shield tunnel. The main steel pipe is provided with air holes, and the air holes adjacent to each other along the axial direction of the main s...
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The invention relates to a newly-built subway tunnel in a soft soil area that traverses an existing tunnel structure, including an existing tunnel, a newly-built subway station, a newly-built subway shield tunnel and a pipe shed made of steel pipes, and the existing tunnel is the same as the newly-built subway shield tunnel. Intersecting and staggering up and down, the pipe shed separates the existing tunnel from the new subway shield tunnel along the up and down direction, one end of the main steel pipe is connected with the ground connection wall of the new subway station, and the other end only passes through the soil in the area Support and extend beyond the existing tunnel by more than the width of the existing tunnel. The construction method of the new subway tunnel crossing the existing tunnel structure in the soft soil area of the present invention is to construct the pipe shed first, and then construct the new subway tunnel. The invention has the advantage of being able to reduce the impact on the existing tunnel when the newly-built subway shield tunnel traverses the existing tunnel, and solves the problem that the newly-built subway tunnel crossing the existing tunnel has a large impact on the existing tunnel.
Description
technical field [0001] The invention relates to the field of building technology, in particular to a new subway tunnel crossing an existing tunnel structure in a soft soil area and a construction method thereof. Background technique [0002] As the development of underground space has received more and more attention, urban rail transit, which is the focus of underground space development, has also received more and more attention. Construction of subway tunnels in cities often encounters the situation that new subway tunnels cross existing tunnels. The new shield subway tunnel crossing the existing tunnel will inevitably cause the displacement field of the soil around the tunnel, especially in the soft soil area, and the poor engineering properties of the soil are even more serious. Under the action of the soil displacement field, the additional load of the existing tunnel increases, which in turn has serious adverse effects on the tunnel, such as segment cracking, bolt di...
Claims
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IPC IPC(8): E21B7/20E21B33/13E21B17/00E21B7/04E21D9/14E02D3/00
CPCE21B7/20E21B33/13E21B17/00E21B7/04E21D9/14E02D3/00
Inventor 刘志贺汪安祥赵利彦王浩苏光旭张伦政林强周鑫
Owner 江苏中车城市发展有限公司