滨海浅埋深厚软土条件下高等级公路地基处理方案研究

Study on Foundation Treatment Scheme of High Grade Highway Under Shallow Buried Deep Soft Soil in Coastal Area

为了解决滨海地区软土地基不稳定及承载力差的问题,以甬台温高速公路某互通至S218省道连接线工程为案例,深入研究了滨海浅埋深厚软土条件下高等级公路地基处理的有效方案。论文深入探讨了就地固化+预应力混凝土管桩处理方案的设计要点,对就地固化强度和深度、管桩桩长和间距的确定、预应力管桩路堤桩基承载力及沉降和稳定计算、提高处理路段稳定性的措施等方面提出了建议。

In order to solve the problems of unstable soft soil foundation and poor bearing capacity in coastal area,taking a connection project between Yongtaiwen Expressway Interconnecting and S218 Provincial Highway as an example,the effective treatment scheme of high grade highway foundation under shallow and deep soft soil in coastal area is deeply studied,the main points of the design of the treatment scheme of in-situ curing+prestressed concrete pipe piles are discussed in depth,and suggestions are put forward on the determination of in-situ curing strength and depth,the length and distance of pipe pile,the calculation of bearing capacity,settlement and stability of prestressed pipe pile embankment,and the measures to improve the stability of the treatment section.