堤防水泥土搅拌桩复合地基稳定分析及应用研究

提出将水泥搅拌桩运用于堤防工程的地基加固,以提高堤防工程的稳定性。分析了水泥搅拌桩的作用机理和水泥土搅拌桩复合地基承载特点,采用面积加权法计算复合土层的抗剪强度,在此基础上进行了复合地基堤防整体稳定计算。结合某河道整治工程实例,探讨了堤防地基水泥搅拌桩的加固效果,评价了不同工况下堤防的稳定性。研究表明,采用水泥搅拌桩加固堤防地基,可以有效提高地基的承载力和堤防的稳定性,且施工快捷,运用效果较好,可为类似工程提供参考。

Study of Application of Cement Mixing Pile to Dike Stabilization

Composite foundation formed by cement agitation piles is used in strengthening dike foundation for improving the stability of dike project. The strengthening mechanism of cement agitation piles is analyzed along with the way in which composite foundation bears external loadings. The weighted area method is adopted to calculate the shearing strength of composite soil, with which the composite foundation stability is calculated. In connection with a case example of a river repair project, improving effect of cement agitation pile is discussed and the dike stability under different working condition is evaluated. The results of study indicate that cement agitation pile can improve effectively the bearing capacity of foundation and the stability of dike, and takes a short construction time and performs well after construction. Thus this procedure of dike stabilization can serves as a reference for other similar projects.