TEST STUDY OF FAILURE MECHANISM OF REINFORCED EARTH RETAINING WALL IN CUT-AND-FILL CONDITION AND UPPER-BOUND METHOD ANALYSIS
LIU Ze1，YANG Guolin2，XU Jiannan2，FANG Yihe2
(1. School of Civil Engineering，Hunan University of Science and Technology，Xiangtan，Hunan 411201，China；
2. School of Civil Engineering，South Central University，Changsha，Hunan 410075，China)
Abstract：A green reinforced gabion earth retaining wall model in the cut-and-fill condition was designed and made. Its deformation，earth pressure and tensile strain of reinforcements were tested by applying hierarchical uniform loads on the wall top，combined with numerical analysis，its bearing capacity development rule and failure model were analyzed. Based on upper-bound method of plastic limit analysis，the calculating formulas for ultimate bearing capacity，safety factor and limit height of reinforced earth retaining wall in the cut-and-fill condition were obtained. The results show that，under the hierarchical uniform loads，its bearing capacity development process can be divided into initial compaction，development，yield and failure stage. The distribution form of wall top vertical settlement is triangular；and sliding instability appears along the cut-and-fill interface. The distribution law of earth pressure，deformation and tensile strains of reinforcements are affected by the failure model. The provided stability analysis method has high precision which considered the effect of reinforcements on steps.
刘 泽1，杨果林2，徐健楠2，房以河2. 半挖半填工况加筋土挡墙失稳机制试验研究与上限法分析[J]. 岩石力学与工程学报, 2013, 32(5): 1032-1041.
LIU Ze1，YANG Guolin2，XU Jiannan2，FANG Yihe2. TEST STUDY OF FAILURE MECHANISM OF REINFORCED EARTH RETAINING WALL IN CUT-AND-FILL CONDITION AND UPPER-BOUND METHOD ANALYSIS. , 2013, 32(5): 1032-1041.
欧阳光前. 半挖半填路基边坡稳定性力学机理研究[硕士学位论文[D]. 长沙：湖南大学，2007.(OUYANG Guangqian. Study on stability mechanism for half filling and half digging roadbed slope[M. S. Thesis][D]. Chuangsha：Hunan University，2007.(in Chinese))
<body>Your browse does not support frame!</body>
2013, Vol. 32 
