水泥搅拌桩在淤泥质软土路基中的试验与应用研究

Test and application of cement mixing pile in the soft soil subgrade

用水泥搅拌桩对湖州市创业大道跨长湖申线大桥工程东引桥桥头软土路基进行了处理,随机抽取3根水泥搅拌桩进行了桩基静载试验,并对桥头段2个断面工后变形进行了监测。试验及监测结果表明:桩基各参数均符合地基处理的力学要求,地基承载力得到了有效的提高;路基沉降较缓慢,且变形速率在施工之后几个月逐渐变小,符合桥头地基的变形要求。

The soft soil subgrade is managed using cement mixing piles at the head of eastern approach span of Shenxian Great Bridge Engineering in Kuachang Lake, Chuangye Road, Huzhou City, three of which are chosen randomly to carry out pile foundation test under static loads, and the deformation of two sections at the head section of the bridge are monitored after the work. The results show that the bearing capacity of foundation soil has improved effectively; the subgrade settlement was slow, and its deformation rate became smaller gradually and which accords with the deformation requirements of the foundation at the head of bridge.