加筋土坡坡顶极限荷载的研究

Research of Limit Loads on the Reinforced Slope's Crest

为探讨加筋土坡坡顶极限荷载的计算问题,假定破裂面为一过坡脚的斜平面,分别以传统塑性理论和广义塑性理论为基础,导出了加筋土坡坡顶极限荷载的计算公式,并与前人试验结果进行了对比分析。分析发现,基于2种塑性理论极限分析法导出的加筋土坡坡顶极限荷载计算公式,对于粘性土加筋土坡的计算结果相差不大,均可作为加筋土坡设计时的参考,而对于砂性土加筋土坡则建议采用基于传统塑性理论的极限分析法。并初步讨论了安全系数的取值问题。

In order to discuss the calculation of the ultimate load on the top of a reinforced soil slope,it is assumed that the failure sur‐face was an inclined plane passing through the toe of the slope,based on the classical plasticity theory and the generalized plasticity theory,the computation formulations of the reinforced slope’s limit loads on crest were deduced,the calculation formula was compared with the pre‐vious test results.The analysis found that the calculation formulas for the top load of reinforced soil slopes derived from the two plastic theo‐retical limit analysis methods in this paper are not much different for the calculation results of the reinforced soil slopes of cohesive soil,and can be used as a reference for the design of reinforced soil slopes.For sandy soil reinforced slopes,the limit analysis method based on traditional plasticity theory is recommended.Finally the factor values were discussed.