基于砂箱模型试验的加筋土挡墙最优布筋方式分析

为探讨最小加筋材料面积的加筋土挡墙最优布筋方式，开展了以纸质作为挡墙面板和加筋材料的砂箱模型试验，测试了加筋土填料和加筋材料的物理力学性质，分析了布筋密度、筋带宽度及长度等因素对加筋土挡墙稳定性的影响规律。试验研究表明:处于极限稳定状态的加筋土挡墙，采用“窄筋密布”、“窄筋长布”方案的用筋量均小于“宽筋疏布”、“宽筋短布”方式；在用筋量相同条件下，采用“上长下短”布置方式的稳定性高于“上下等长”布置。

Analysis on Optimal Arrangement Way of Reinforcement for Soil Retaining Wall Bases on Sand-Box Model Test

In order to study optimal arrangement way ot remtorcement, with material, for soil retaining wall, sand-box model test which takes paper as the wall panel and the reinforcement material was conducted, so as to test the mechanical properties of the filling and reinforcement materials, and analyze the law how the factors, such as reinforcement density, width and length of reinforcement strip, affect the stability of the retaining wall. The results show that, for the retaining wall in the state of ultimate stability, the schemes of ＂concentrated narrow strips＂ or ＂long narrow strips＂ have less reinforcement strip used than the ones of ＂loose wide strips＂ or ＂ short wide strips＂; on the conditions of same reinforcement strips, the arrangement of ＂upper long, lower short＂ has better stability than one of ＂upper and lower in same length＂.