【作者】 黄燕宏； 龚文惠； 刘军；

【Author】 HUANG yanhong GONG Wenhui LIU Jun (Civil Engineering and Mechanics Institute, Huangzhong University of Science and Technology, Wuhan 430074, China)

【机构】 华中科技大学土木工程与力学学院；

【摘要】 本文采用理想弹塑性本构模型和D-P准则,建立了渗流作用下土坝边坡有限元分析模型。通过试验测得土坝在渗流前后土体的抗剪强度。利用有限元法模拟了在渗流引起的渗透力、抗剪强度降低等因素作用时土坝边坡的位移场和安全系数,分析了渗流对土坝边坡的综合影响。分析表明:渗流产生的渗透力对边坡稳定性的影响不明显,而对于黏性土质边坡,渗流导致的土体抗剪强度降低对边坡稳定性的影响较明显,在实际工程中不宜忽略。更多还原

【Abstract】 Basing on the elastic-perfectly plastic constitutive model and D-P criterion, the FEM analysis model on earth dam slope is built on the condition of seepage. The shear strength of the soil is measured by test before and after seepage in the earth dam. The displacement field and the safety factor of the earth dam slop is simulated by FEM when the osmotic pressure and the shear strength reduction caused by the seepage are taken into accounted, and the comprehensive effects of seepage to the earth dam slope are analyzed. The analysis indicates that the effect of the osmotic pressure from seepage to the earth dam stability is small, but the effect of the shear strength reduction to the earth dam stability is apparent in clay soil slopes, and it couldn’t be ignored in practical engineering.更多还原