李旭方.天陇铁路上倪滑坡工程地质特征分析及地质选线[J].甘肃地质,2021,(4):67-74
天陇铁路上倪滑坡工程地质特征分析及地质选线
Engineering Geological Characteristics and Geological Route Selection of Shangni Landslide on Tianshui?鄄Longnan Railway
  
DOI:
中文关键词:  天陇铁路  上倪滑坡  地质选线
英文关键词:Tianshui-Longnan Railway  Shangni landslide  geological condition  route selection
基金项目:
作者单位
李旭方 中铁第一勘察设计院集团有限公司陕西 西安 710043 
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中文摘要:
      在天陇铁路勘察设计工作中,发现上倪滑坡是新建天水至陇南铁路一处控制性不良地质体。本文在充分获取地质资料的基础上,从地形地貌角度出发,结合其地层岩性特征,分析了滑坡成因,认为上倪滑坡在北侧和南侧各存在一个软弱面,滑坡整体稳定性较差,尤其是滑坡北侧危险性较大。通过力学计算,显示该滑坡自然状态下能够保持相对稳定,但在地震或暴雨天气下发生滑动的可能性极大,对线路工程具有严重影响。经过对三种线路方案的综合比选,建议以深埋隧道形式从后壁通过上倪滑坡,保证工程安全性。
英文摘要:
      Shangni landslide is a controlled geological factor on the newly built Tianshui-Longnan Railway. Based on the full acquisition of geological data, this paper analyzes the causes of landslides from the perspective of topography and geomorphology, combined with the lithological characteristics of the strata. Shangni landslide has a weak surface on the north and south sides, and the overall stability of the landslide is poor, especially on the north side. Mechanical calculations show that the landslide can remain relatively stable in its natural state, but it is highly likely to slip under earthquakes or heavy rain, which has a serious impact on the line project. After comprehensive comparison and selection of the three route schemes, it is recommended to pass through the Shangni landslide from the scarp in the form of a deep buried tunnel to ensure the safety of the project.
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