摘要
假定活动门上方无黏性土滑移面为抛物线形,以滑移面间水平薄层作为分析单元,根据分析单元的静力平衡条件,推导了活动门上方侧压力系数和竖向应力计算公式。研究了模型高宽比、土体内摩擦角对竖向应力的影响。结果表明:模型高宽比、内摩擦角越大,竖向应力越小,土拱效应越明显。求解得到的竖向应力较前人理论结果更接近数值模拟结果,且当滑移面竖直时的计算结果与Terzaghi理论结果吻合较好,验证了计算方法的正确性和合理性.
Under are parabolic, th the static equilib vertical stress an the assumption that the slip planes of non-viscous soil beyond the Trap-door e horizontal plane between the slip planes is. analyzed in this study. Based on rium condition of the horizontal plane, theoretical formulas for determining d the coefficient of lateral earth pressure are represented. The influences of height-width ratio and internal friction angle on vertical stress are studied, and results show that with increasing height-width ratio and internal friction angle, the vertical stress decreases and the arching effect is more apparent. Calculation results by using the proposed formulas show a better match with the simulation results, and the calculation result based on a vertical slip plane is in agreement with the Terzaghi theory, it illustrates the validity of the proposed formulas.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2014年第3期374-379,共6页
Journal of China University of Mining & Technology
基金
国家重点基础研究发展计划(973)项目(2012CB026103)
关键词
应力偏转
侧压力系数
竖向应力
土拱效应
stress rotation
coefficient of lateral earth pressure
vertical stress
soil arching
