湖南怀新高速公路某路堑滑坡成因及稳定性分析

ANALYSIS ON THE CAUSE AND STABILITY OF A CUTTING LANDSLIDE IN HUAIXIN EXPRESSWAY IN HUNAN PROVINCE

沪昆高速怀化至新晃段K73+590^+730段左侧路堑高边坡,在修建过程中发生了滑坡。通过野外地质调绘及勘察,揭露了该滑坡的滑体、滑带、滑床岩土性状;结合滑坡变形特征和监测资料,分析了滑坡的成因机制;利用试验和反演确定了滑带抗剪参数,计算了不同工况下的滑坡稳定性和剩余下滑力。通过地质分析,结合计算结果,该滑坡将继续变形并向两侧及后缘扩展,甚至显著滑动,必须采取有效的防治措施。该滑坡实例的分析研究成果,对类似工程具有借鉴意义。

A landslide occurred during the construction process at the high cut slope of the left side of the K73+590^+730section of the Huaihua-Xinhuang section of the Shanghai-Kunming Expressway.Through field geological mapping and investigation,the sliding mass,sliding zone and sliding bed properties of the landslide were exposed.The formation mechanism of the landslide was analyzed,combined with the landslide deformation characteristics and monitoring data.The test and inversion were used to determine the shear parameters of sliding zone.The landslide stability and residual sliding force under different working conditions were calculated.Through geological analysis,combined with the calculation results,the landslide will continue to deform and expand to both sides and the trailing edge,or even significantly slide.Effective measures must be taken.The analysis and research results of this landslide example can be used for reference in similar projects.