沪宁高速公路软基的粉喷桩处理

The Jet-grouting Pile Improvement of the Hu-Ning Freeway Soft Ground

鉴于沪嘉、广佛高速公路处理软基的塑料板或砂袋排水法存在的施工期长、地基总沉降大和工后次固结沉降大的问题，作者建议在沪宁高速公路采用粉喷桩法处理软基。文中的昆山试验路段的资料论证了粉喷桩所起的复合地基作用相对于排水法处理的优点及其较高的经济效益。

In view of the long construction period, large total settlement and largesecondary consolidation settlement of the soft ground as treated by cardboard wicks orpacked drains in the Hu-Jia Freeway and Guang-Fu Freeway,the author proposed the jet-grouting pile method for improving the soft ground of Hu-Ning Freeway.The good effect ofthe composite ground action brought out by the jet-grouting pile method as compared withthe cardboard wick method and its good economic benefit shown by the Kungshan trial roadare presented in the paper.