本文選題：邊坡臨界滑動場 + 邊坡穩(wěn)定性��； 參考：《巖土力學》2016年S2期

【摘要】：降雨持時較長且雨強較大時,雨水的入滲不僅會增大孔隙水壓力,且易使張裂縫充水形成靜水壓力,對邊坡穩(wěn)定不利。結合降雨條件下飽和-非飽和滲流分析,考慮降雨過程中的瞬態(tài)孔隙水壓力場與瞬態(tài)強度場,并同時考慮張裂縫充水時的靜水壓力,對邊坡臨界滑動場法進行改進,提出降雨條件下具有張裂縫邊坡臨界滑動場數值模擬方法,且對其進行了驗證。將該方法用于一個典型均質黏土邊坡算例,結果表明,(1)文中方法可考慮張裂縫具體位置、深度及其充水狀態(tài)下對邊坡穩(wěn)定性的影響,并能搜索出任意形狀危險滑面,計算結果合理可靠;(2)降雨條件下張裂縫中靜水壓力對邊坡穩(wěn)定性及滑面形狀有較大影響;(3)降雨條件下張裂縫位置對邊坡穩(wěn)定有較大影響,距坡肩越近,張裂縫對邊坡穩(wěn)定性影響越大;(4)張裂縫處在最不利位置且充水時存在一個最不利深度。
[Abstract]:When the rainfall duration is longer and the rainfall intensity is larger, the infiltration of Rain Water will not only increase the pore water pressure, but also make the tension fracture fill water to form hydrostatic pressure, which is unfavorable to the slope stability.Based on the analysis of saturated-unsaturated seepage flow under rainfall condition, the critical sliding field method of slope is improved by considering the transient pore water pressure field and transient strength field in the process of rainfall, and considering the hydrostatic pressure when the tension fracture is filled with water at the same time.A numerical simulation method for critical sliding field of slopes with tensile cracks under rainfall conditions is proposed and verified.The method is applied to a typical homogeneous clay slope. The results show that the method can take into account the influence of the concrete position of the tensile crack, the depth and the filling state on the slope stability, and can search the dangerous slip surface of any shape.The calculated results are reasonable and reliable. Under rainfall condition, hydrostatic pressure in tension crack has great influence on slope stability and slip surface shape. Under rainfall condition, the position of tension crack has great influence on slope stability, and the closer it is to the slope shoulder, the more close it is to slope stability.The greater the influence of tension fracture on slope stability, the greater the influence of tension fracture on slope stability. (4) the tension crack is in the most unfavorable position and there exists a most disadvantageous depth when filling water.
【作者單位】： 合肥工業(yè)大學土木與水利工程學院;合肥工業(yè)大學安徽省土木工程與材料省級重點實驗室;
【基金】：教育部優(yōu)先發(fā)展課題(No.2013JYYF0661) 水利部公益項目(No.201401063) 國家自然科學基金(No.51179043)~~
【分類號】：TU43

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