Method for improving flatness of tunnel initial spraying concrete

A technology of primary sprayed concrete and flatness, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve the time-consuming and labor-intensive leveling process of the artificial primary support, poor quality of the smoothness of the initial support of the tunnel, and difficulty in reaching the bedrock surface Flatness and other issues to achieve the effect of eliminating hidden quality hazards, convenient and quick establishment, and ensuring the flatness and thickness of the initial support

Pending Publication Date: 2022-03-04
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Problems solved by technology

[0003] The main factor of the poor flatness of the initial branch of the tunnel lies in the control of smooth blasting, which is also subject to changes in geological conditions and the control is very unstable, so the bedrock surface blasted out is often difficult to achieve the required flatness
After blasting, concrete spraying is required, an

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  • Method for improving flatness of tunnel initial spraying concrete
  • Method for improving flatness of tunnel initial spraying concrete
  • Method for improving flatness of tunnel initial spraying concrete

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[0027] For purposes of the present application, technical solutions and advantages clearer, the accompanying drawings and the following embodiments, the present invention will be further described in detail. It will be appreciated that the specific embodiments described herein are intended to explain the invention and is not intended to limit the invention. Further, the technical features according to each of the various embodiments described below can be combined with each other as long as they do not constitute a collision between each other.

[0028] Such as image 3 , Figure 4 and Figure 5 , The present application discloses a method of spraying concrete tunnel First improved flatness embodiment, comprising the steps of: S1: the three or more length-adjustable anchor device 100 is inserted vertically in the bedrock of the tunnel 4. Anchor apparatus 100 functions as a support base, and the length of the anchor device 100 may be adjustable, the height can be adjusted according to...

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Abstract

The invention discloses a method for improving the flatness of initial spraying concrete of a tunnel, and relates to the technical field of tunnel construction, and the method for improving the flatness of the initial spraying concrete of the tunnel comprises the following steps: S1, vertically inserting more than three anchor rod devices with adjustable lengths into bed rock of the tunnel; s2, a reflective leveling line is arranged in a pulling mode, and the reflective leveling line is supported at the top ends of all the anchor rod devices; the lengths of all the anchor rod devices are adjusted according to the thickness and flatness of a primary support spraying layer required by tunnel design; and S3, spraying the primary support spraying layer, and enabling the top surface of the primary support spraying layer to be flush with the reflective leveling line. According to the method for improving the flatness of the tunnel initially-sprayed concrete, it can be guaranteed that the flatness of the initial support meets the requirement in the initial support concrete spraying process.

Description

technical field [0001] The present application relates to the technical field of tunnel construction, in particular to a method for improving the smoothness of primary shotcrete in tunnels. Background technique [0002] In the process of tunnel construction, the smoothness of the initial support of the tunnel is the key to the quality control of the tunnel construction. The smoothness of the initial support of the tunnel is closely related to the quality of the secondary lining of the tunnel, and the secondary lining of the tunnel has strict testing requirements. For a long time, the defect rectification of high-speed railway tunnels has always been a key factor that plagues the safe operation of railway lines, and the quality control of the smoothness of the initial support of the tunnel directly affects the construction quality of the secondary lining of the tunnel, such as insufficient thickness of the secondary lining, voiding at the back Such serious quality defects thr...

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Application Information

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IPC IPC(8): E21D11/10E21D21/00
CPCE21D11/10E21D11/105E21D21/0026E21D21/0093
Inventor 张毅新颉建中王文勇黄中华赵俊付浩龚辉忠张红心左晟吴峰南中全吴金霞陈强宋红伟刘军波易旺杨伦李宇松
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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