多桩型复合地基在厚层软基加固中的应用

为解决水利工程厚层软土地基处理的问题，以芜湖市湾沚区十三连圩咸保站工程为例，介绍了 PHC 管桩和双向水泥土搅拌桩两种长短桩组成的多桩型复合地基处理技术，通过对工程地质条件、地基承载力及工程造价等方面分析，结果表明：多桩型复合地基既能满足建筑物承载力要求,又能加快施工进度，缩短工期，能有效解决厚层软土地基沉降及水平变形控制问题。

The application of the composite foundation with multiple reinforcement of different materials or lengths in the reinforcement of thick layer soft foundation

In order to solve the problem of thick soft soil foundation treatment in water conservancy projects, this paper took the Xianbao station project in Shisanlian Weir, Wanzhi District, Wuhu City as an example, and introduced the composite foundation with multiple reinforcement of different materials or lengths treatment technology consisting of PHC pipe piles and bidirectional deep mixing column. Through analysis of the engineering geological conditions, foundation bearing capacity, and engineering cost, the results showed that the composite foundation with multiple reinforcement of different materials or lengths could not only meet the building''s bearing capacity requirements but also accelerated construction progress, shorten construction period, and effectively solved the problems of settlement and horizontal deformation control of thick soft soil foundation.