某互通立交软基病害分析及处理方案研究  

Disease analysis and treatment scheme for the soft foundation of an interchange

作　　者：施斌林 张浩 SHI Binlin;ZHANG Hao(No.1 Engineering Company of China Railway No.8 Engineering Group,Chongqing 400053,China;Nanjing R&D Tech Group Co.Ltd.,Nanjing 210029,China)

机构地区：[1]中铁八局集团第一工程有限公司,重庆400053 [2]南京瑞迪建设科技有限公司,江苏南京210029

出　　处：《现代交通与冶金材料》2021年第5期11-17,共7页Modern Transportation and Metallurgical Materials

摘　　要：探讨了某深厚软土地区高速互通立交工程的路基病害,以地基处理施工方案和监测数据为依据,分析路桥连接位置差异沉降和高填方路基失稳的原因,针对性地提出二次处理方案,并通过二次处理施工期的监测数据进行方案论证。研究表明:真空联合堆载预压法是处理深厚软基的一种行之有效的方法,地基处理后的沉降量取决于使用期荷载和施工期荷载之间的关系,为使工后沉降可控,施工期荷载不应小于使用期荷载。深厚软土地区,为减小差异沉降,使刚性桩基础和软土地基之间平稳过渡,设置过渡段是必要的。另外,深厚软土地区建设高填方路基,监测工作必不可少。This paper discusses the subgrade diseases of interchange project of expressway in a deep soft soil area.Based on the foundation treatment construction scheme and monitoring data,the causes of differential settlement of road and bridge connection positions and instability of high-filled subgrade are analyzed,the secondary treatment scheme is put forward and verified by the monitoring data during the secondary treatment construction period.The research shows that vacuum combined surcharge preloading method is an effective method to treat deep soft founda-tion.The settlement amount after foundation treatment depends on the relationship between the load during the service period and the load during the construction period.In order to make the settlement after construction under control,the load during the construction period should not be less than the load during the service period.In deep and thick soft soil areas,in order to reduce differential settlement and make a smooth transition between rigid pile foundation and soft soil foundation,it is necessary to set up a transition section.In addition,monitoring is indispensable for the construction of high-filled roadbeds in deep soft soil areas.

关 键 词：深厚软土路基 互通立交 路基病害 处理方案 监测 

分 类 号：U416.1[交通运输工程—道路与铁道工程]