PHC管桩在临港新城市政道路桥台后高填土路基处理中的应用

Application of PHC Pipe Pile in High Filling Subgrade behind Municipal Road Abutment of Lingang New City

临港新城是上海未来发展的重点区域之一,近年来,临港地区的市政基础设施建设快速推进,但是,复杂的软土地基给市政建设带来了严峻的考验,尤其是在桥台后的高填土路基段,由于地基土的含水量较大,压缩性高、强度低,如果采用常规处理方式,极易产生桥头跳车现象,严重影响行车的安全性和舒适性,本文结合实际工程,通过对比分析,提出采用PHC管桩处理桥台后高填土软土路基,取得了良好的效果。

Lingang New City is one of the key areas to be developed in the future of Shanghai. In the recent years, the construction of municipal infrastructures in the area of Lingang is promoted rapidly. However, the complex soft soil subgrade brings a serious test to the municipal construction, especially in the high filling subgrade section behind the abutments. Owing to the larger moisture content, high compressibility and low strength of subgrade soil, the conventional treatment mode if used will be very easily to cause the vehicle bump at bridgehead and seriously to affect the traffic safety and comfort. According to the practical projects,this paper puts forward the use of PHC pipe piles to treat the high filling soft soil subgrade behind the abutments through comparative analysis. A good technical effect is achieved.