基于强度折减理论的加筋土边坡稳定性分析

doi:10.12066/j.issn.1007-2861.2033

摘要/Abstract

摘要：

结合有限元软件 ABAQUS 和强度折减理论, 通过对均质路堤边坡进行数值模拟, 分别对土质边坡以及加筋土边坡进行敏感性分析, 研究了边坡的几何参数、土体强度和刚度、筋材埋置深度和间距以及长度对边坡稳定性的影响. 结果表明: 土体黏聚力对边坡安全系数影响最为显著, 其次是土体的内摩擦角、边坡比、筋材的长度和间距; 筋材铺设在潜在滑移面, 即素土边坡塑性破坏区域, 能够很好地限制坡体的滑移, 有效提高边坡的稳定性.

关键词: 强度折减理论, 数值模拟, 敏感性分析, 边坡稳定性, 安全系数

Abstract:

Based on finite element method ABAQUS and strength reduction theory, the numerical simulation and sensitivity analysis of the soil slope with and without reinforcement were conducted. The influence of geometrical parameters of slope, strength and stiffness of soil, permutations and combinations pavement of geogrids on the slope stability was studied. The results suggested that soil cohesion had the most obvious impact on the safety of slope, and that other factors like soil internal friction angle, slope angle, permutations and combinations of spacing of geogrids were also significant in affecting the safety of slope. It was noted that when geogrids buried across the potential sliding surface (the plastic region of unreinforced slope), the displacement of slope could be confined obviously and the slope stability could get improved efficiently.

Key words: strength reduction theory, numerical simulation, sensitivity analysis, slope stability, safety factor

中图分类号:

TU472

顾婕, 张孟喜. 基于强度折减理论的加筋土边坡稳定性分析[J]. 上海大学学报(自然科学版), 2019, 25(6): 990-1002.

Jie GU, Mengxi ZHANG. Stability analysis of reinforced slopes based on strength reduction theory[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(6): 990-1002.

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