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首页> 外文会议>World Landslide Forum 3, Volume 4: Discussion Session >Role of Soaking in Rainfall-Induced Slope Failure according to Nonlinear Failure Envelope
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Role of Soaking in Rainfall-Induced Slope Failure according to Nonlinear Failure Envelope

机译：基于非线性破坏包络线的浸泡在降雨诱发的边坡破坏中的作用

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摘要

Slope failure caused by surface water infiltration is common in tropical countries.When water infiltrates into slope the magnitude of suction diminishes, and in turn shear strength also reduces.At zero suction the shear strength envelope correspond to the shear strength at saturation which is commonly thought as the lowest shear strength.Analysis proved that many slopes are still stable even though being infiltrated to the failure depth and this has puzzled the engineers of how the slope has failed.This paper will substantiate that the lowest shear strength is not the shear strength at saturation.The shear strength envelope is further lowered when the soil with clay minerals in its constituent is soaked.This has been the common triggering factor in slope failure caused by rainfall infiltration and never being incorporated in slope design.A case study of a slope failure in tropical sedimentary residual soil in Malaysia will be presented where unsoaked and soaked consolidated drained triaxial tests have been conducted for soaking period of 7 and 14 days.And stability analysis applying linear and non-linear failure envelope have been conducted and compared.
机译：地表水渗透引起的边坡破坏在热带国家很普遍，当水渗入坡面时，吸力的大小减小，反过来剪切强度也降低。在零吸力下，剪切强度的包络线与饱和时的剪切强度相对应。分析证明，即使渗透到破坏深度，许多边坡仍保持稳定，这使工程师对边坡如何破坏感到困惑。本文将证明，最低剪切强度不是在处的剪切强度。当土壤中含有粘土矿物的土壤被浸泡时，抗剪强度的包络线进一步降低，这是降雨渗入导致边坡破坏的常见触发因素，并且从未纳入边坡设计中。在未浸泡和浸泡的综合排水三处将展示马来西亚的热带沉积残留土壤进行了7天和14天的浸泡期轴向试验，并进行了线性和非线性破坏包络线的稳定性分析并进行了比较。

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