A lining pouring construction method for coping with systematic over-excavation of a tunnel
By adjusting the tunnel design outline and using a lining trolley for direct lining pouring, the problems of construction delays and concrete waste caused by systematic over-excavation of the tunnel were solved, achieving efficient tunnel construction.
CN116607972BActive Publication Date: 2026-07-07CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA RAILWAY 18TH BUREAU GRP CO LTD
- Filing Date
- 2023-07-05
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
In existing tunnel construction, systematic over-excavation leads to delays in construction progress and increases in concrete usage. Traditional methods require spraying concrete to fill the over-excavated portion before lining is poured, which increases project costs.
Method used
By measuring the tunnel cross-section and adjusting the lining design outline, the lining is poured directly using a lining trolley, avoiding the use of sprayed concrete. A trolley with specific performance is used to pour the lining according to the adjusted outline.
Benefits of technology
Shorten the construction period, reduce the amount of concrete used, meet the requirements of green construction, and reduce project costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116607972B_ABST
Abstract
The application discloses a lining pouring construction method for coping with systematic over-excavation of a tunnel, and belongs to the technical field of tunnel construction. When systematic over-excavation of a half ring or a full ring occurs in a tunnel, lofting measurement is performed on the tunnel section, the range of systematic over-excavation is determined, and an adjustable contour line is drafted, and then a lining trolley is installed according to the adjusted contour line. The lining trolley can realize one-side or full-ring outward expansion, and directly pours lining on the systematic over-excavation area, so that the lining thickness meets the design requirements. The method adopts the lining trolley with the outward expansion function, directly pours lining on the systematic over-excavation tunnel area, can shorten the construction period, reduces the waste of concrete after pouring lining on the systematic over-excavation tunnel area to the original contour, saves materials, and meets the requirements of the current green construction.
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