Narrow space tunnel starting tunneling counter-force device
By injecting grout into the tunnel rock and soil to form a combined structure of anchor reaction frame and prestressed steel strands, the problem of tunnel construction in a narrow space was solved, and the smooth start of the tunnel was achieved.
CN223410843UActive Publication Date: 2025-10-03中国水利水电第七工程局有限公司 +2
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Patent Information
- Application Number
- CN202422904420.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Technical Problem
During urban tunnel construction, the reaction frame support device is difficult to install in a narrow space, resulting in difficulties in tunnel construction.
Method used
A combined structure of reaction frame, prestressed steel strands, anchor bodies, anchors and clips is adopted. The anchor bodies are formed by grouting in the tunnel rock and soil, and the prestressed steel strands are used to provide excavation reaction force to achieve tunnel start.
Benefits of technology
It effectively provides excavation reaction force in a small space, solves the space limitation problem of tunnel construction and realizes the smooth start of tunnel construction.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN223410843U_ABST
Abstract
The utility model discloses a narrow space tunnel starting tunneling counter-force device, which relates to the technical field of tunnel engineering construction and comprises a counter-force frame, a prestressed steel strand, an anchoring body, an anchorage device, a clamping piece and a support. The counter-force frame is arranged on a negative ring duct piece of a shield tunneling machine or a TBM tunneling machine, an anchorage device is arranged on the counter-force frame, the front end of the prestressed steel strand is inserted into a drill hole of a tunnel rock-soil body through a support, and the rear end of the prestressed steel strand penetrates through the anchorage device on the counter-force frame, is provided with a clamping piece and a jacking base plate and then penetrates into the jack. And grouting is performed in drill holes of the tunnel rock-soil body to form an anchoring body so as to realize anchoring with a side slope soil body. When the counter-force device is used for construction, in the stretching process of the prestressed steel strand, the clamping piece and the anchorage device are wedged tightly to form an anchoring effect; according to the counter-force device, tunneling counter-force is provided through the tensile force of the prestress steel strand, starting tunneling of the tunneling machine in a narrow space is achieved, and the problems that urban tunnel starting tunneling construction is limited by the narrow space of an urban area, and starting tunneling is difficult are solved.
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