A tool change method for tunneling under ultra-high water pressure conditions in underwater shield tunnels
A technology for shield tunneling and underwater tunnels, which is applied in tunnels, earth-moving drilling, mining equipment, etc., can solve the problems of reducing the construction risk of tool change time and the inability to apply ultra-high water pressure submarine tunnels, and achieves a feasible construction risk. Safe, reliable and easy to operate
Active Publication Date: 2021-02-02
CHINA RAILWAY LIUYUAN GRP CO LTD
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Problems solved by technology
[0006] The present invention aims at the problem in the prior art that the above-mentioned traditional shield tunnel tunnel tool change method under pressure cannot be applied to the ultra-high water pressure subsea tunnel technology problem, and provides an underwater shield tunnel excavation tool change method under ultra-high water pressure conditions. Realize the tool change operation of the underwater or subsea shield tunnel under the ultra-high water pressure exceeding 1MPa, ensure the efficient and safe excavation of the shield machine, the construction method is simple, the structure is safe and reasonable, the construction is convenient and fast, the time of tool change is greatly reduced and the Reduce construction risk
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[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0042] The embodiment of the present invention discloses an underwater shield tunnel excavation and tool change method under ultra-high water pressure conditions, such as Figure 1-Figure 3 As shown, taking the high-speed railway single-track tunnel as an example, the outer diameter of the shield section is 12.0m and the inner diameter is 10.8m, including the following steps in order:
[0043] Step 1: Collect and analyze the construction condition data of the underwater tunnel;
[0044]Collect underwater tunnel construction condition data, mainly including geology, water depth and tunnel burial depth, etc., and analyze tunnel excavation risk factors along the tunnel longitudinal direction in combination with shield machine perform...
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The present invention disclose a method of digging the knife and switch to the ultra -high water pressure conditions of the underwater shield tunnel.Step 3: Arrive at the preset reinforcement point active sword; step 4: analyze the data and dynamically adjust the sword changing reinforcement point in front;Difficult to change the knife.The present invention can realize the sword changing operation of the underwater or submarine shield tunnel over 1MPa to ensure that the shield machine can be tapped efficiently and safely. The construction method is simple, the structure is safe and reasonable, and the construction is convenient and fast.The knife time is reduced and the construction risk is reduced.
Description
technical field [0001] The invention belongs to the technical field of design and construction of tunnels and underground engineering, and in particular relates to a tool replacement method for ensuring the smooth and safe excavation of shield tunnels during the construction of long-distance shield tunnels in sea areas and under ultra-high water pressure conditions method. Background technique [0002] Most cities in our country are built on water, and coastal cities and island cities develop rapidly because of the sea. But oceans and rivers also limit the city's traffic development. With economic development and technological progress, more and more underwater tunnels have been constructed, and the shield tunneling method is the most widely used construction method. For the case of crossing a large water depth, the construction of shield underwater tunnels faces major difficulties such as complex construction conditions and high water pressure tool change, which directly ...
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IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 宋超业贺维国杜宝义段悟哲刘鹏毕经东田峰吕青松范国刚
Owner CHINA RAILWAY LIUYUAN GRP CO LTD