强降雨和初始地下水对浅层边坡稳定的综合影响

发布时间：2018-06-12 14:35

本文选题：强降雨入渗 + 初始地下水　；参考：《中南大学学报(自然科学版)》2014年03期

【摘要】：下部为基岩的浅层残积土边坡多含有地下水,通过对传统Green-Ampt入渗模型的延伸,研究含有地下水的残积土边坡强降雨入渗过程;在强降雨入渗条件下,湿润区和地下水范围内基质吸力消失,湿润峰处和基岩面处为2个潜在的危险滑动面,分别对边坡在其上稳定性进行分析,并将二者统一起来,建立考虑强降雨和初始地下水共同作用下边坡的稳定分析模型。研究结果表明:下部含有初始地下水的浅层边坡在强降雨入渗期间,由于上部土体自重的增加,边坡最危险滑裂面在湿润峰和基岩面之间可能发生转移,边坡有可能在基岩处提前于湿润峰处破坏;同时,黏聚力越小,地下水位越浅,降雨入渗期间边坡在地下水下部基岩处破坏的可能性就越大,且土体黏聚力的影响最为显著。
[Abstract]:The shallow residual soil slope with bedrock in the lower part contains groundwater. By extending the traditional Green-Ampt infiltration model, the infiltration process of residual soil slope with groundwater is studied under the condition of heavy rainfall infiltration. The matrix suction disappears in the wetting area and the groundwater area, and two potentially dangerous sliding surfaces are located at the wetting peak and the bedrock surface. The stability of the slope on the slope is analyzed, and the two surfaces are unified. The stability analysis model of slope considering the interaction of heavy rainfall and initial groundwater is established. The results show that the slope with initial groundwater in the lower part of the slope may transfer between the wet peak and the bedrock surface due to the increase of the weight of the upper soil mass during the period of heavy rainfall infiltration. At the same time, the smaller the cohesion force, the shallower the groundwater level, the more likely the slope will destroy at the bottom of the groundwater bedrock during rainfall infiltration, and the effect of soil cohesion is the most significant.
【作者单位】：浙江大学滨海和城市岩土工程研究中心;浙江大学软弱土与环境土工教育部重点实验室;
【基金】：国家自然科学基金资助项目(51178423)
【分类号】：TU470

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