湖北咸宁三元路市政道路工程软基处理方法

Treatment method for soft foundation of municipal road engineering of Sanyuan Road in Xianning,Hubei

湖北为千湖之省,沟塘湖汊众多,市政道路施工过程中极易经过软基路段,如何选用经济适用的软基处理方式,值得研究。本文结合咸宁三元路市政道路工程,分析了5种常用软基路基处理方式,提出了4种软基处理方案,并分别作了方案经济技术比选,确定“软基厚≤3 m时采用换填碎石土方法,软基厚>3 m时采用水泥搅拌桩方法”为最佳的软基处理方案。分析认为水泥搅拌桩在湖北地区应用广泛,技术成熟,且工程造价相对其他方案较为经济。通过沉降分析计算以及工后检测,工程应用效果较好,满足工程要求。

Hubei is a province with thousands of lakes,and many channels,ponds and lakes formed by tributaries.It is likely to encounter soft foundation in municipal road construction.Selecting the economic and applicable soft foundation treatment methods is the main core of this research.Based on the municipal road engineering of Sanyuan Road in Xianning,five common soft foundation subgrade treatment methods are analyzed,four soft foundation treatment schemes are proposed,and the economic and technical comparisons of the schemes are made respectively.After comparison,the best soft foundation treatment scheme is proposed,such as“when the thickness of soft foundation is≤3 m,the method of replacing gravel soil is recommended,and when the thickness of soft foundation is>3 m,the method of cement mixing pile is recommended”.The analysis shows that the cement mixing piles are widely used in Hubei,the technology is mature,and the project cost is relatively economical compared with other schemes.Through settlement analysis,calculation,and post-construction inspection,the engineering application effect is justified and meets the engineering requirements.