水泥搅拌桩对复合地基沉降的影响研究

Research on the Influence of Cement Mixing Pile on the Settlement of Composite Foundation

为了研究水泥搅拌桩的承载特性,文章首先通过单桩竖向静载试验得到水泥搅拌桩的荷载沉降曲线,以判断水泥搅拌桩的承载力特征值,再通过现场测量的数据研究桩体长度和桩间距对沉降的影响。结果表明:在施工中,考虑工程安全性,应尽量采取四喷两搅的施工工艺。随着桩间距的增加,中心桩中的轴向力增加,角桩中的轴力减小。桩长越长,桩身能承受的荷载越大,即能承受更大的路基荷载。

In order to study the bearing characteristics of cement mixing pile,the load settlement curve of cement mixing pile is firstly obtained by vertical static load test of single pile to judge the bearing capacity characteristic value of cement mixing pile.Then,the influence of pile length and pile spacing on settlement is studied through on-site measurement data.The results show that in the construction,considering the engineering safety,the construction technology of four spraying and two stirring should be adopted as far as possible.With the increase of pile spacing,the axial force in the central pile increases and the axial force in the corner pile decreases.The longer the length of the pile,the greater the load that the pile can bear,that is,it can bear greater subgrade load.