绿色加筋格宾挡墙工程特性试验研究

为研究绿色加筋格宾挡墙的工程特性，分析其作用机制，进行了包括加筋土体垂直土压力、墙背侧向土压力、拉筋受力变形和面墙变形等内容的测试。在挡墙顶面施加6个荷载水平的加、卸循环荷载，研究了加筋土体中垂直土压力和墙背侧向土压力的大小和分布情况、拉筋应变沿筋长的分布情况、绿色加筋格宾挡墙潜在破裂面以及面墙变形规律等。试验结果表明：挡墙垂直土压力沿筋材方向大致呈均匀分布，墙背侧向土压力沿墙高呈曲线分布，其值小于理论值；第3层筋材应变沿筋长方向呈单峰值分布，第5层呈双峰值分布；与0.3H法和朗肯法相比，试验得到的挡墙潜在破裂面更加靠后；面墙的变形在加、卸循环荷载作用下呈现出弹塑性，最大侧向变形发生在第5层。

Test study of engineering properties of green reinforced gabion retaining wall

In order to research the behaviors of green reinforced gabion retaining wall, tests including vertical soil pressure, lateral soil pressure, the deformation behaviors of reinforcement as well as the wall face were carried out. At the top of retaining wall, cyclic loading and unloading of six levels were imposed. The distributions of vertical soil and lateral soil pressure, the strain of reinforcement, and the lateral deformation and settlement behaviors of wall face under test loading were analyzed. Test results show as follows. Vertical soil pressure distributes along reinforcement uniformly, and lateral soil pressure shows nonlinear distribution along wall back. Test values of both vertical and lateral soil pressure are less than theoretical values. The strain of reinforcement in the third layer is single-peak distribution, and double-peak distribution in the fifth layer; the potential failure surface of retaining wall occurs behind that determined by 0.3H method and Rankine method. The deformation of wall face under test loading shows elastoplastic property. The largest lateral deformation occurs in the fifth layer.