摘要
某码头堆场软土地基发生了推移,采用了树根桩网复合地基进行加固。通过离心模型试验,研究了垫层对树根桩单桩承载特性的影响,对比分析了离心模型试验和现场静载试验的单桩承载变形差异,并与规范方法计算的单桩竖向极限承载力进行了比较。结果表明,垫层对树根桩单桩极限承载力影响显著,加筋垫层单桩极限承载力最大,其次是砂垫层,无垫层最小;离心模型试验和现场静载试验的Q-s曲线均存在比较明显的差异,离心模型试验得出的单桩极限承载力大于现场静载试验,单桩竖向极限承载力计算值低于离心模型和现场静载试验值。
For the slipped soft soil foundation in the storage yard of a wharf,the root pile-net composite foundation is used.The centrifugal model test are carried out to study the effects of cushions on the bearing behaviors of single root pile.The bearing deformation difference of single pile between the centrifugal model tests and the field static loading tests is compared and analyzed.The test results of the vertical ultimate bearing capacity of single pile are compared with the calculated ones by the China's code method.The results show that the cushions have significant effects on the ultimate bearing capacity of single root pile which is the largest under reinforced cushion layer,followed by sand cushion layer and non-cushion.There are obvious differences between the Q-S curves of the centrifugal model tests and field static loading tests.The ultimate bearing capacity of single pile of the centrifugal model tests is greater than that of the field static loading tests.The calculated values of the vertical ultimate bearing capacity of single pile are lower than those of the centrifugal model tests and the field static loading tests.
作者
任国峰
刘超
林显才
曹昌浩
连长秋
REN Guo-feng;LIU Chao;LIN Xian-cai;CAO Chang-hao;LIAN Chang-qiu(Geotechnical Engineering Departmetn,Nanjing Hydraulic Research Institute,Nanjing 210024,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China;Zhanjiang Port(Group)Co.LTD,Zhanjiang 524068,China;Guangdong Province Planning and Design Institute for Water Transportation Co.LTD,Guangzhou 510050,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2022年第S02期198-202,共5页
Chinese Journal of Geotechnical Engineering
基金
中央级公益性科研院所基本科研业务费专项资金项目(Y321006,Y321007)
关键词
树根桩
单桩承载力
离心模型试验
现场静载试验
垫层
root pile
bearing capacity of single pile
centrifugal model test
field static loading test
cushion
