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| Landslide Characteristics and Control Countermeasures between K22+000～+ 220 Section along Shi－Zhong Highway |
| SONG Xiang － jun |
| Northwest Research Institute Co．Ltd of CREC，Lanzhou，Gansu 730000，China |
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Abstract Research purposes:In this paper，the mechanism of the steep rock landslides have been proposed based on the geological survey of the landslide characteristics．The "S" － shaped fold is appeared in short axis tectonic section of the local zone．It is easy to form the geological formation model with upper gentle and lower steep in the slope． It is found that the deep layer rock landslide occurred after excavation of small parties in the amount．In connection with the occurred reason of this kind of rock landslides，it is proposed that subgrade plan is adopted by bridge plan for control countermeasures．This control countermeasure is mainly to avoid compaction of landslide deformation to the bridge resulting from irreversible damage．
Research conclusions: Rock landslide of steep along the floor is one of landslide types，which with complex mechanism is uncommon，huge．On the basis of the landslide structure survey，the focus of landslide research is to analyze the disturbance factors and to research interaction between the projects and the main structures．It is to minimize landslide hazards of the principal structure．
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Received: 12 May 2011
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［1］ 中铁西北科学研究院有限公司．石忠高速公路沙子立交区滑坡、边坡勘察设计文件［R］．兰州: 中铁西北科学研究院有限公司，2006．
Northwest Research Institute Co．Ltd of China Railway Engineering Corporation．Slope Survey and Design Documents of Shazi Overpass Area in Landslide Zone along Shi － Zhong Highway［R］．Lanzhou: Northwest Research Institute Co．Ltd of China Railway Engineering Corporation，2006．
［2］ 王恭先，等． 滑坡学及滑坡防治［M］．北京: 中国铁道出版社，2001．
Wang Gongxian，etc．Landslidology and Landslide Control［M］．Beijing: China Railway Publishing House，2001．
［3］ 徐邦栋．滑坡防治［M］．北京: 中国铁道出版社，1999．
Xu Bangdong． Landslide Control［M］．Beijing: China Railway Publishing House，1999．
［4］ 冯君，周德培，江南，等．顺层岩石边坡顺层滑动岩体范围分析［J］．山地学报，2007(3) :376－379．
Feng Jun，Zhou Depei，Jiang Nan，etc．On the Extent of Bedding Slipping Rock Mass of Consequent Rock Slope ［J］． Journal of Mountaun Science，2007(3) :376－379．
［5］ 张卢明，何敏，郑明新，等．降雨入渗对滑坡渗流场和稳定性的影响分析［J］，铁道工程学报2009(7) :17－21．
Zhang Luming，He Min，Zheng Mingxin，etc．Effect Analysis of Rainfall Infiltration on the Landslide Seepage Field and Stability［J］．Journal of Railway Engineering Society，2009(7) : 17－21．
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2011, Vol. 28 
