To reduce the safety risk of the largespan
section and the ultrasmall cleardistance section of the bifurcated tunnel, and to meet the schedule
requirements, the method of replacing the middle rock pillar by smallclear span section and the optimizing the doublearch to side tunnel and enlargement and shotcrete is adopted
according to the bad tunnel geological conditions, complex surrounding
environment and high sensitivity of a bifurcated municipal tunnel. And then the
side pilots of bifurcated largespan section are
enlarged to original size of 2lane crosssection, the middle pilot is reduced in sequence, and the coherent
construction of the pilots on both sides can be optimized into the integrated
doubleside piloting method. By adopting the method
mentioned above, the optimization of the construction method of the longspan section and the ultrasmall cleardistance section can be realized, the construction risk can be
effectively controlled, and rapid construction can be achieved.
HU Xinpeng
,
WANG Dengfeng
,
XIAO Benli
.
Optimization of Safe and Efficient Construction Method for Bifurcated Tunnel
[J]. Tunnel Construction, 2020
, 40(S2)
: 210
-215
.
DOI: 10.3973/j.issn.2096-4498.2020.S2.027
