DOI: 10.11799/ce201710020
Undercutting construction of open tunnel with covered arch in shallow buried loess area
JIA Li-shu
LU Zheng-yan
HAN Ying-jun
Abstract：Aiming at the complex ground conditions and large difficulty for tunnel open-cut construction in shallow buried loess area, we analyzed the advantages and disadvantages of open - cut method and undercutting of open tunnel with covered arch, and the later method was selected to cross shallow buried loess area. The undercutting construction technology of open tunnel with covered arch in shallow buried loess area was studied, from the entrance fencing and drainage, covered arch undercutting, open -cut supporting arch in roof caving section, three bench temporary lateral bracing construction in pipe shed section, and secondary lining construction. The results showed that, favorable economic and social benefits were achieved using the proposed construction technology, which not only ensured the safety of tunnel construction, protected the surrounding ecological environment, but also reduced the project cost.
Keywords：shallow buried loess areacovered archopen -cut methodundercutting of open tunnelthree -bench temporary lateral bracing method
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 81-83,86 )