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A tunnel entry method based on end-wall guide wall structure

A technology for guiding walls and tunnels, which is used in infrastructure engineering, tunnels, tunnel linings, etc. to achieve high longitudinal anti-slip and anti-overturning capabilities, improve longitudinal load-bearing capacity, and avoid large excavation effects.

Active Publication Date: 2022-03-04
中铁二院重庆勘察设计研究院有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the current technical problems, the present invention provides a tunnel entry method based on the end wall type guide wall structure to solve the problems of the prior art

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  • A tunnel entry method based on end-wall guide wall structure
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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0031] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be cons...

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Abstract

The invention discloses a tunnel entry construction method based on an end wall type guide wall structure, which comprises the following steps: S1, constructing a gutter drainage system at the entrance of the tunnel; S2, carrying out grouting reinforcement of steel pipe piles in the range of an upside-down landslide; S3, constructing an end tunnel Wall-type guide wall structure, specifically: S31, excavate layer by layer to support the soil in the range of the guide wall and the portal, respectively support the temporary uphill slope and the temporary side slope; S32, construct the guide wall to fix the steel frame, and Bind the orifice pipe to the outside of the steel frame; S33, use the tunnel core soil and the guide wall to fix the steel frame as a support, and bind the bottom form of the guide wall; use the tunnel core soil and the soil nail wall as a support, bind the outer form of the guide wall; S34, Under the support of the bottom mold of the guide wall, the outer mold of the guide wall and the inner soil nail wall, the concrete structure of the guide wall is poured to form the end wall. After the concrete strength reaches 70% of the design strength, the bottom mold of the guide wall and the outer mold of the guide wall are removed ; S4, with the end wall as the support, build a large pipe shed; S5, excavate and support the door and dark hole.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel entry method based on an end wall type guide wall structure. Background technique [0002] Due to the influence of factors such as engineering geology, hydrogeology and human activities, there are more and more cases of engineering small landslides formed on the uphill slope soil layer of the tunnel entrance. For example, the soil layer at the entrance slope of the Muer Tunnel on the East Ring Road of a certain railway hub is relatively thick. After the excavation of the channel at the entrance of the tunnel, due to the influence of slope cutting at the foot of the slope and continuous heavy rainfall, settlement cracking, deformation and slippage occurred in the tunnel slope area, and the deformation range Nearly 30m, forming a small engineering landslide. In order to ensure the safety of construction and railway operation, it is necessary to deal with lands...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14E21D11/10E02D17/20E02D29/02E02D5/74E02D3/12
CPCE21D9/14E21D11/105E02D17/20E02D29/0275E02D5/74E02D29/0233E02D3/12
Inventor 旷文涛刘保林曹林卫杨昌宇杨翔朱小兵李鸿于茂春杨宝田攀徐昆杰胥犇李爽吴伟姜波汪伟松裴昌进
Owner 中铁二院重庆勘察设计研究院有限责任公司
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