陕西高速公路某滑坡形成原因及其治理方法探讨
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摘要
高速公路路线滑坡灾害普遍存在。根据陕西省某高速公路滑坡的工程地质特性、形态、结构特征及变形破坏特征,分析了滑坡形成的机制,指出其属于牵引式滑坡。通过稳定性计算可知,在天然情况下,滑坡坡体处于极限平衡状态。由于滑坡坡区处在地震7度区内,因此滑坡的整治要考虑地震的影响,其抗滑安全系数选取1.10。在分析成因机制和卸载后滑坡体设计推力计算的基础上,提出了削方减载、滑坡体后壁加固、设置截排水沟和坡面整修、绿化等整治措施,为此类滑坡整治对策提出了依据。
The landslide hazards are generally existed along the expressways.On the basis of engineering geological characteristics,configuration,structure characteristics and failure deformation characteristics,have analyzed formation mechanism of an expressway landslide,and pointed out that is a retrogressive landslide.Through the stability calculation,under the natural condition,the landslide mass is in a state of limit equilibrium.Since the landslide is situated in a 7.0 magnitude earthquake territory,thus the governing of landslide should with a view to the impact from earthquakes;safety factor against sliding 1.10 has been selected.Based on formation mechanism analysis and landslide mass designed thrust calculation after unloading,governing measures of landslide mass unloading,back wall reinforcing,catch drain setting,slope finishing and planting have been put forward,thus the basis of governing countermoves for landslides of the same kind.
The landslide hazards are generally existed along the expressways.On the basis of engineering geological characteristics,configuration,structure characteristics and failure deformation characteristics,have analyzed formation mechanism of an expressway landslide,and pointed out that is a retrogressive landslide.Through the stability calculation,under the natural condition,the landslide mass is in a state of limit equilibrium.Since the landslide is situated in a 7.0 magnitude earthquake territory,thus the governing of landslide should with a view to the impact from earthquakes;safety factor against sliding 1.10 has been selected.Based on formation mechanism analysis and landslide mass designed thrust calculation after unloading,governing measures of landslide mass unloading,back wall reinforcing,catch drain setting,slope finishing and planting have been put forward,thus the basis of governing countermoves for landslides of the same kind.
引文
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[3]刘广润,晏鄂川,练操.论滑坡分类[J].工程地质学报,2002,10(4):339-342.LIU Guangrun,YAN Echuan,LIAN Cao.Discussion on classification oflandslides[J].Journal of Engineering Geology,2002,10(4):339-342.
[4]成永刚.山西省高速公路滑坡初探[J].西安科技大学报,2008,28(4):685-689.CHENG Yonggang.Preliminary analysis of landslides in Shanxi expresshighway[J].Journal of XIAN university of science and technology,,2008,28(4):685-689..
[5]杨喜成.陕西地质灾害特点[J].陕西地质,2001,19(2):75-81.YANG Xicheng.Characteristics of geological hazards in Shaanxiprovince[J].Geology of Shaanxi,2001,19(2):75-81.
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