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Underground excavation tunnel water-stop structure and construction method for protecting groundwater environment

A construction method and groundwater technology, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as groundwater pollution, achieve the effects of saving groundwater resources, avoiding large-scale drainage construction, and protecting the groundwater environment

Active Publication Date: 2018-11-30
SHANDONG GEOLOGICAL ENG INVESTIGATION INST
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Problems solved by technology

[0005] The object of the present invention is to provide a water-stop structure for underground excavation tunnels and its construction method for protecting the groundwater environment, so as to solve the problems of underground water quality pollution and protection of groundwater resources during tunnel construction.

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  • Underground excavation tunnel water-stop structure and construction method for protecting groundwater environment
  • Underground excavation tunnel water-stop structure and construction method for protecting groundwater environment
  • Underground excavation tunnel water-stop structure and construction method for protecting groundwater environment

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Embodiment Construction

[0043]The present invention will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

[0044] Considering that water is the source of life and a precious resource for the survival and development of cities, more than half of the cities in my country have shortage problems. Therefore, how to protect precious groundwater resources during the construction of urban subways is a problem that engineers and technicians intend to solve. Key technical issues, such as Jinan, a city famous for its spring water, protect the water quality and quantity of spring water, which is the most important issue in the construction of the subway. The technical problem to be solved by the invention is how to protect groundwater during the construction of subway tunnels in water-rich areas, and how to realize safe, fast and efficient excavation of subway tunnels without precipitation. Therefore, the technical problems clearly to be solved are:...

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Abstract

The invention relates to an electrified railway technology, in particular to a subsurface tunnel waterstop structure used for protecting a groundwater environment and a construction method thereof. The waterstop structure comprises a plurality of vertical frozen earth waterstop layers distributed sequentially in the tunnel direction and horizontal waterstop layers surrounding the outer contour of a tunnel, and the horizontal waterstop layers extend in the extending direction of the tunnel; the vertical frozen earth waterstop layers and the horizontal frozen earth waterstop layers intersect with each other; and the bottoms of the vertical frozen earth waterstop layers are lower than the bottoms of the horizontal frozen earth waterstop layers; and tunnel lining structures are arranged between the horizontal frozen earth waterstop layers and the tunnel. The vertical frozen earth waterstop layers and the horizontal frozen earth waterstop layers are adopted to form a cup-shaped frozen earth waterstop layer, the groundwater environment is protected, and groundwater is prevented from being polluted in the tunnel construction process. By the adoption of the frozen earth waterstop structure, large-scale drainage construction is avoided, precious groundwater resources are saved, and settlement deformation of surrounding adjacent buildings and structures caused by drainage construction is avoided at the same time.

Description

technical field [0001] The invention relates to electrified railway technology, in particular to a water-stop structure for underground excavation tunnels and a construction method thereof for protecting the groundwater environment. Background technique [0002] For subway construction in water-rich areas, when the underground excavation method is used for subway tunnel construction, it is the basic work before tunnel excavation to use water stop or drainage to treat groundwater within the tunnel excavation range. At present, the water stop of subway tunnels in my country generally adopts grouting water stop or rotary grouting pile water stop. These two water stop methods need to inject cement slurry into the soil layer, which will pollute the water quality of groundwater. At the same time, the flow direction of cement slurry is not easy to control, and it is easy to block groundwater. The seepage channel changes the seepage path of groundwater. However, if the drainage sche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/38
CPCE21D11/38
Inventor 赵振华王少娟彭玉明孙斌张云峰刘琮琮陆书南黄薛毕雯雯雷炳霄李洪涛
Owner SHANDONG GEOLOGICAL ENG INVESTIGATION INST
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