Tunnel dredging method suitable for railway large section IV, V class rock tunnel
A large-section, tunnel technology, applied in tunnels, tunnel lining, earthwork drilling, etc., can solve the problems of unstable progress, narrow working space, easy deformation of surrounding rock, etc., and achieve the effect of easy operation.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0022] An excavation method suitable for railway large-section IV and V-level surrounding rock tunnels. First, according to the tunnel span and height requirements, the surrounding rock is excavated into a ladder shape with a lower step 5 and a middle step 3, and then includes the following steps: A , After the advanced support is applied, excavate the arc-shaped guide pit 2 of the arch along the excavation contour line, the height of the arc-shaped guide pit 2 is 3.0-4.0m, and immediately spray 3-5cm thick concrete to seal , and reserve the core soil in the middle as the upper step 1, and at the same time implement the initial support of the arch. It is 1.5-2.5m, and the excavation cycle footage is determined according to the distance between the initial support steel frames; B. Under the protection of the arch support, the left and right side walls of the middle steps 3 are excavated alternately and the core soil 4 is reserved. For the initial support, the excavation cycle f...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com