某高陡型牵引式滑坡群形成机理及治理效果评价

Formation Mechanism and Governance Effect Evaluation of the High-steep Type of Traction of Landslide Group

为进一步研究高陡型牵引式滑坡群形成机理及治理效果,以贵州某高陡型牵引式滑坡群为例,通过野外地质调查,分析其形成机理主要为:(1)地形地貌高陡,为滑坡形成提供了有利地形条件;(2)松散坡积物与岩层组成的脆弱岩土结构,为滑坡形成奠定了物源基础;(3)坡脚关键阻滑块体缺失使得坡脚临空,为滑坡提供了变形空间,控制牵引式滑坡的形成;(4)水与岩土体相互作用弱化岩土体物理力学性能,是滑坡形成的主要诱因。对该高陡型牵引式滑坡群进行稳定性分析和分区治理,并利用有限元进行治理效果评价,结果充分证明抗滑桩能有效控制牵引式滑坡的位移和应变。其成果对此类高陡型牵引式滑坡群治理具有指导意义。

In order to further study the formation mechanism and governance effect of the high-steep type of traction landslide groups,this paper takes a high-steep type of traction landslide groups in Guizhou as an example and analyzes its formation mechanism through field geological survey:(1)The topography is high and steep,which provides favorable landform conditions for the formation of landslides;(2)The fragile rock and soil structure composed of loose sediment and rock stratum,the foundation of the provenance was established of landslides;(3)The absence of the key anti-slip block in the foot of the slope makes the slope foot appear in the air,which provides the deformation space for the landslide and controls the formation of the traction landslides;(4)The interaction between the water and the rock as well as soil weakens the physical and mechanical properties of rock and soil,which is the main inducement for landslides formation.The stability analysis and zonal governance measure of the high-steep type of traction landslide group,and the governance effects were evaluated using the finite element method.The result fully demonstrate that the anti-slide pile can effectively control the displacement and strain of the traction landslide.The result has guiding significance for the governance of such the high-steep type of traction landslide group.