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| 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) |
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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.
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Received: 18 June 2012
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2013, Vol. 32 
