吹填土地基道路工后不均匀沉降分析及加固措施研究  

Study of uneven settlement and reinforcement measure of a roadbed on reclaimed soil foundation

作　　者：赵亮[1] 闫澍旺[1] 

机构地区：[1]天津大学,天津300072

出　　处：《土木工程学报》2012年第2期176-183,共8页China Civil Engineering Journal

摘　　要：使用真空预压加固后的吹填土地基上建造的路基,工后路面出现了严重的波浪形不均匀沉降病害。分析该吹填土地基上路基工后沉降的主要原因,并使用有限元模拟计算该吹填土地基的工后平均沉降,计算结果与实测数据吻合较好。通过将在波浪形路面行驶的车辆简化为理想的物理模型,分析车辆荷载加剧路面初始不均匀差异沉降,并最终形成严重波浪形病害的成因。提出应以减小工后地基差异沉降的加剧为重点的设计思路,采取土工格栅加固该路基的工程措施。A roadbed built on reclaimed soil strengthened by vacuum preloading technique exhibited serious wave-shape uneven settlement after construction. The causes of the uneven settlement are analyzed numerically, and the results agree well with the field monitoring data. The mechanism of aggravation of the differential settlement is studied through a simplified physical model consisting of moving vehicle load on wave-shape road. Measure for control of the post-construction differential settlement is proposed. Application of geogrid in that roadbed is studied, and themethod is proved to be effective to reducing the uneven settlement.

关 键 词：吹填土地基 波浪形不均匀沉降 PLAXIS 车辆荷载 土工格栅 

分 类 号：U416.02[交通运输工程—道路与铁道工程]