Abstract：Research purposes:The tunnel of Zhengzhou -Xian PDL part of are loess tunnel. The cross- section of loess tunnel is very large and it is 163. 53 ㎡. Construction is very difficult .During the construction o f the outlet section Of Hejiazhuang tunnel .The tunnel crown settles too much with cracks occurred on the ground surface.This document Attempt to solve some technical problems during the construction of large cross- section loess tunnels through analysis And research.
Research results:(1)It is preferable to adopt steel frames instead of lattice girders for large cross -section loess Tunnel;(2)The structure shall be closed to form a ring as soon as possible;(3)The deformation shell be effectively controlled during every excavation step as well as the supporting;(4)The fully- sealled waterproofing shall be adopted for the ground surface.
高树峰. 客运专线大断面黄土隧道浅埋偏压施工技术[J]. 铁道工程学报, 2008, 25(10): 32-35.
GAO shu-feng. Construction Technology of Large Cross- section Loess Tunnel with Shallow Cover and Unbalanced Load o f passenger Dedicated Line(PDL). 铁道工程学报, 2008, 25(10): 32-35.
2008, Vol. 25 
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