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| Three - dimensional Analysis of Force and Deformation Characteristics of Oblique Crossing of Railway Tunnel with Landslide |
| WANG Lei1，SHEN Yuan2，BAI Chao - neng2 |
| (1. ChangFn University，XiFn，Shanxi 710064，China; 2. XiFn Railway Survey and Design Institute Co. Ltd，Xi’an， Shanxi 710054，China ) |
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Abstract Abstract ： Research purposes ： In engineering practice，due to the concept of space and linear constrained conditions， railway tunnel must be through the landslide and the tunnel portal must be set on the landslide. The existing relevant research results are mostly based on the two - dimensional model of theory analysis. When the railway tunnel and landslides oblique，true 3D model can reflect interaction and structure deformation characteristics of the tunnel and landslide more truly. Taking Youzuitou landslide renovation of tlie Luoyangcun tunnel rebuilding project of Ganquan - Zhongjiacun railway as the background， MIDAS GTS finite element software is used to establish three - dimensional model of landslide，anti - slide pile，tunnel and simulate anti - slide pile construction，the roadbed and the tunnel hole excavation supporting construction process. Extracted from the results of numerical calculation of each construction step， the stress of tlie tunnel structure and anti - slide pile deformation data are used to study stress deformation characteristics of railway tunnel while the railway tunnel oblique crossing with landslide and the influence of tunnel excavation on the landslide stability process. Research conclusions ：( 1) The stress characteristics of tunnel in the sliding body and sliding bed resjDectively show the bias and confining pressure. (2) The longitudinal deformation of tunnel structure is mainly focused on the sliding zone nearby. (3 ) The hole body of tunnel is completely excavated into the slide bed , the influence on the stability of landslide and anti - slide force gradually disappear.
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Received: 01 February 2016
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2017, Vol. 34 
