基于砂箱模型试验的肋板式挡墙稳定性及合理布置方式分析
The stability and arrangement of ribbed slab retaining wall based on sandbox model test

肋板式挡墙是由墙面挡土板、摩擦锚固肋板和肋间土体组成的一种新型支挡结构,其稳定性主要受肋板长度及布置间距的影响,为此开展了采用纸质作为挡墙面板和肋板的小型砂箱模型试验。研究结果表明:肋板式挡墙承受的土压力主要通过肋板与肋间土体的摩阻力平衡,稳定需满足肋板最小长度,且肋板长度≥布置间距的基本布置要求;根据不同的肋板布置方式,肋板式挡墙存在长肋疏布的摩擦锚固型和短肋密布的整体土墙型2种典型作用模式;极限稳定状态下,肋板长度≈布置间距的过渡型布置方式最合理,所需肋板面积最小。
Ribbed slab retaining wall is a new kind of retaining structure constructed of retaining plate, its stability is mainly affected by rib length and spacing. The sandbox model test was conducted using paper face-plate and ribbed plate. It shows that the soil pressure under ribbed slab retaining wall was mainly balanced by the friction of rib and intercostal soil. The stability conditions need to meet the layout requirements that the minimum length of the ribs is reached, and rib length is larger than floors spacing layout requirements. According to different floor layout of the structure. ribbed slab retaining wall mechanics model for long rib sparsely distributed friction anchoring type and short ribs clouds the whole wall type. On the limit steady state, between the two typical mechanical functions model, the floor layout is the reasonable arrangement—Rib length = rib spacing, and the floor area is minimum