Abstract：Research purposes：Based on using the finite element theory to do the simulation calculation of the actual construction process of large-section loess tunnel with the optimized excavation method, the analyses are made for the change regulations of stress field, displacement field and structural strength of surrounding rock, and the applicable Scopes of the different construction methods are determined according to the allocation of resources, construction progress and monitored results for the purpose of select a reasonable construction method for large section loess tunnel.
Research conclusions：Combined with the geological condition of surrounding rock of large section loess tunnel, the researches are done on the qualitative and quantitative indicators of construction process, subsidence, construction order, resource allocation, construction risks and construction costs of construction large section loess tunnel with CRD method, short bench 7-step method and twine side wall pilot tunnel method. In addition, the traditional excavation method is optimized in the construction or derand support method, and the advantages and disadvantages of the different construction methods are offered to provide the reference to the similar works.
张英才；胡国伟；辛振省. 大断面黄土隧道开挖工法对比分析与选择[J]. 铁道工程学报, 2010, 27(3): 87-92.
ZHANG Ying-cai, HU Guo-wei, XIN Zhen-xing. Comparative Analysis and Selection of Construction Methods for Large Section Loess Tunnel. 铁道工程学报, 2010, 27(3): 87-92.
Xu W enfeng, Zhang Feng, Chen Jianping. Optmiization Study on CRD Method for a Large-Span Loess Tunnel[J]. Journal of Disaster Prevention and Mitigation Engineering, 2009(5): 572 -576.
Hao Jinping. Key Construction Technologies of Large Section Loess Tunnel with the Inclined Shaft Hole Intersection on Passenger Dedicated Line[J]. Railway Standard Design, 2009(4): 86 -90.
Yang Jianmin, Yu Yu, Tan Zhongsheng, etc. Experimental Research on the Surrounding Rock Pressure of Large Sectional Loess Tunnel under Deep and Shallow Submersion[J]. Journal of Railway Engineering Society, 2009(2): 76-79.
Chu Houyong. Modern Transportation Technology Monitoring and Measurement Technology on the Wall Rock Deformation in Large Section Loess Tunnel[J]. Modern Transportation Technology, 2009(1): 68 -72.
Yang Huijun. Deformation Characteristic of Tunnel Surrounding Rock Under Complex Conditions[J]. Journal of Railway Engineering Society, 2006(1): 57-60.
Ding Rui, Fan Peng, Jiao Cang, etc. Analysis on the G round Deformation Numerical Imitates of Shallow Tunnel in Different Excavation[J]. Journal of Railway Engineering Society, 2005(4): 62 -65.
2010, Vol. 27 
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