钉形水泥土双向搅拌桩在道路软基中的应用

Application of T-shaped bidirectional Cement Soil Mixing Piles in Soft Base Improvement of Roads

文章结合工程实例,介绍了钉形水泥土双向搅拌桩在道路建设中的应用,探究了钉形水泥土双向搅拌桩在高含水率淤泥质黏土中最优水灰比的选择及其变化规律;通过复合地基承载力试验,分析了钉形水泥土搅拌桩的受力特征。结果表明,根据变化规律选定的最优水灰比在该地区软基处理中的成桩效果良好,荷载作用下沉降量小。

An engineering example is studied in order to introduce the application of T-shaped bidirectional cement soil mixing piles in road construction,explore the optimum water-cement ratio and its variation rule for T-shaped bidirectional cement soil mixing piles driven into the silt clay with high moisture content.Furthermore, the stress characteristic of T-shaped cement soil mixing piles is analyzed through a bearing capacity test of composite foundation.The analysis results show that the optimum water-cement ratio selected according to the variation rule leads to good pile-forming effect in local soft base improvement and less amount of settlement under load action.