真空-堆载预压联合加固道路软基沉降规律研究  

Settlement Law of Soft Roadbed Reinforced By Vacuum-Surcharge Preloading

作　　者：黄艳军 张艳林 刘夕奇 王聪 王东星[2] Huang Yanjun;Zhang Yanlin;Liu Xiqi;Wang Cong;Wang Dongxing(Sinohydro Engineering Bureau 7 Co.,LTD,Chengdu Sichuan,610213,China;School of Civil Engineering,Wuhan University,Wuhan Hubei 430072,China)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《港工技术》2022年第6期97-101,共5页Port Engineering Technology

摘　　要：本研究依托广州市南沙区某填筑项目道路软基处理工程,综合考虑真空-堆载联合预压荷载形式、初始条件和边界条件建立Abaqus有限元模型,对联合预压加固软基固结沉降过程进行数值计算,并将模拟计算结果与实测数据比较剖析。所得结果证明:数值模拟得到软基固结沉降数据和现场实际监测数据演变规律相吻合,能较好模拟各级堆载预压过程中软基沉降速率变化规律。模拟数据曲线比实测数据曲线收敛速率更快,计算值与实测值吻合较好,综合评定认为该区域软基处理加固达到设计卸载要求,建议真空卸载。Based on soft roadbed improvement of a filling project at Nansha district in Guangzhou,Abaqus finite element model was established by taking into account vacuum-surcharge preloading,initial condition and boundary condition.The simulated settlement process is compared with the real-measured data,which shows that the simulation data on the consolidation settlement of soft base is consistent with the evolution law of real-measured data,presents well the change of soft base settlement rate under different surcharge preloading levels.The simulated data curve tends to converge faster than the measured data curve,and the calculated result agrees well with the measured value.Comprehensive evaluation result shows that local soft base improvement meets the designed vacuum unloading requirement.

关 键 词：道路软基 真空-堆载预压 有限元模拟 沉降 

分 类 号：TU44[建筑科学—岩土工程]