深厚软基填方边坡变形控制及对策

Deformation Control and Its Countermeasure of Embankment Slope in Deep and Thick Soft Foundation

结合某深厚软土地基填方边坡工程实例,通过优选采用加筋土挡墙进行边坡支护,并采用有限元分析加筋土挡墙的稳定性及变形特征,探讨软土地基加筋土挡墙的工作特点及变形控制对策。结果表明,加筋土挡墙对地基承载力、不均匀沉降变形要求均较低;CFG桩可将上部结构荷载传递至深层土体,有效提高地基承载力、控制地基沉降变形;在软土地基条件下加筋土挡墙为首选挡墙,研究成果可为类似边坡工程设计提供指导。

In combination with a deep soft soil embankment slope engineering instances, the reinforced soil retaining wall was proposed to support the slope. The stability and deformation of the reinforced soil retaining walt was analyzed by using the finite element analysis methods. Then the work characteristics of reinforced soil retaining wall and the countermeasures to avoid deformation were discussed. The results show that the reinforced soil retaining wall whieh have low requirement of bearing ca- pacity and uneven settlement deformation can be used to soft soil foundation. CFG pile can transfer the upper structure load to the deep soil, which can effectively improve the bearing capacity and control the settlement of the foundation. Under the condition of soft soil foundation, the reinforced soil retaining wall should be preferred. Research results can provide guidance for similar slope engineering design.