PHC管桩复合地基处理技术在路桥过渡段的应用研究

已有的工程实践表明,路桥过渡段往往会由于路桥两种结构形式的不同产生不均匀沉降,发生诸如桥头跳车、路面开裂等病害,在软弱地基条件下,病害尤为明显。该文以上海虹桥枢纽工程为背景,在软弱下卧层的不良地质条件下,采用PHC管桩复合地基处理技术对路桥过渡段进行路基处理,降低路桥段的不均匀沉降,避免病害的发生。实际工程应用表明,该方法应用成效明显,且施工速度快、工程造价低。

Study on Application of PHC Pipe-pile Composite Subgrade Treatment Technology in Transition Section of Road and Bridge

The engineering practice shows that the transition section of road and bridge often has the uneven settlement because of the different structural types of road and bridge to result in the faults of bridgehead bump and pavement cracking,especially obviously in the soft weak subgrade.Taking Shanghai Hongqiao Hub Project as the background,the article introduces the application of PHC pipe-pile composite subgrade technology to treat the transition section of road and bridge under the bad geological condition of soft underlying stratum to reduce the uneven settlement of the road and bridge section and to avoid the fault causing.The practical engineering application shows that this method has the obvious application effect,the construction speed is fast and the engineering construction cost is low.