稳定固化土重力式挡土墙承载特性研究

Bearing Characteristics of Gravity Retaining Wall with Stabilized Solidified Soil

采用土壤减水粉剂和土壤稳定液剂及少量水泥对土体进行改良,将处理后的土壤(稳定固化土)用于修筑重力式挡土墙,利用室内模型试验研究不同工况下稳定固化土重力式挡土墙对边坡的支护效果及宽度对固化土挡土墙支护效果的影响,为稳定固化土重力式挡土墙的工程应用提供理论参考。研究表明:稳定固化土重力式挡土墙对边坡的支护效果较好,可提高被支护坡体承载力,较好地约束坡体变形,经分层击实修筑后,其整体性较好。当挡土墙宽度增加时,被支护坡体承载力增幅明显,坡顶承受相同竖向均布荷载时的竖向沉降和水平位移均有不同程度减小,坡体的稳定性得到提高。

The soil water-reducing powder, soil stabilizing agent and a small amount of cement were used to improve the soil. The treated soil(stabilized solidified soil) was used to build gravity retaining wall. The supporting effect of stabilized solidified soil gravity retaining wall on slope under different working conditions and the influence of its width on the wall were studied by indoor model test, which provided theoretical reference for engineering application of stabilized solidified soil gravity retaining wall. The study shows that the stabilized soil gravity retaining wall has a good supporting effect on the slope. It can improve the bearing capacity of the supported slope and better restrain the deformation of the slope and has a better integrity after the layered compaction construction. When the width of the retaining wall increases, the bearing capacity of the supported slope increases significantly, the vertical settlement and horizontal displacement of the top of the slope under the same vertical uniform load decrease to different degrees, and the stability of the slope body is improved.