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Method for rapidly constructing anchor rods in soft rock large-deformation tunnel through step method

A construction method and large deformation technology, applied in the installation of bolts, earth cube drilling, mining equipment, etc., to achieve the effects of ensuring the safety of construction personnel, accelerating construction speed, and shortening time

Inactive Publication Date: 2019-07-12
中铁五局集团成都工程有限责任公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The present invention provides a rapid construction method of bolts by step method in soft rock large deformation tunnels, aiming to solve the above existing problems

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  • Method for rapidly constructing anchor rods in soft rock large-deformation tunnel through step method

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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have Certain orientations, constructed and operative in certain orientations, therefore are not to be construed as limitations on the invention. In addition, in the description o...

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Abstract

The invention discloses a method for rapidly constructing anchor rods in a soft rock large-deformation tunnel through a step method. The method comprises the following steps that S1, a tunnel upper step is excavated; S2, the lithological character of surrounding rock, strength, stress, the buried depth, the layer thickness and occurrence structure characteristic information are obtained, and the tunnel large-deformation grade is judged; S3, according to the tunnel large-deformation grade, the types of the anchor rods are selected, and concrete is initially sprayed; S4, construction preparationis conducted, and setting-out is conducted at short anchor rod mounting hole sites; and S5, the short anchor rods are mounted, grouting is conducted, and after grout reaches the strength, anchor baseplates are mounted. The construction method is suitable for a soft rock large-deformation railway tunnel, a soft rock large-deformation highway tunnel and similar underground engineering, according to the different construction procedures and space conditions of the step method, the short anchor rods are constructed firstly, then the long anchor rods are constructed, it is ensured that the anchorrod supporting effect can be exerted in time, and occurring and developing of large deformation are effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a rapid construction method for bolts of large-deformation tunnels in soft rock by step method. Background technique [0002] In the past, in the construction of large-deformation tunnels in soft rock, the occurrence and development of large deformation cannot be well judged, and because tunnels with large deformation in soft rock mostly adopt partial excavation methods, the construction space for long bolts is limited, and construction The time is often lagging behind, causing large deformations to be dealt with after development. Not only is there a great safety risk in expanding excavation and replacing the deformed and damaged initial support, but also the construction period and cost have increased enormously. Therefore, it is very important to judge the occurrence and deformation level of large deformation in time, and quickly implement the bolt supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00
CPCE21D20/003
Inventor 鲜国周跃峰罗宁宁
Owner 中铁五局集团成都工程有限责任公司
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