离合式承压箱在复合地基静载荷试验中的数值仿真  

Numerical simulation in clutch bearing cell of static load test on composite foundation

作　　者：方磊[1,2] 范立雄 唐新鸣 FANG Lei;FAN Lixiong;TANG Xinming(Institute of Geoteehnical Engineering,Southeast University,Nanjing,Jiangsu 210096,China;Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety,Nanjing,Jiangsu 210096,China;Xuzhou Co Ltd,China Building Materials Inspection and Certification Group,Xuzhou,Jiangsu 221002,China)

机构地区：[1]东南大学岩土工程研究所,江苏南京210096 [2]江苏省城市地下工程与环境安全重点实验室,江苏南京210096 [3]中国建材检验认证集团徐州有限公司,江苏徐州221002

出　　处：《中国矿业大学学报》2018年第4期713-718,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(41172239)

摘　　要：针对常规复合地基静载荷试验的不足,提出了一种基于离合式承压箱的复合地基静载荷试验方法.依托工程实例,建立常规承压板和离合式承压箱的复合地基静载荷试验有限元分析计算模型.结果表明:利用离合式承压箱进行复合地基静载荷试验是可行的,搭建一次反力平台,能够先后开展复合地基和复合地基中增强体单桩静载荷试验,并且所得到的增强体单桩最终沉降量比常规静载荷试验减小了35.87%,因此所获得的复合地基中增强体单桩承载能力更加接近复合地基实际承载性状.基于离合式承压箱的复合地基静载荷试验方法优化了静载荷试验条件,更有利于科学合理地确定复合地基的承载能力,从而可以节约地基处理工程造价.Aiming to the shortage of static load test on composite foundation,a method based on clutch bearing cell was put forward.Rely on a project example,finite element analysis and calculation model for conventional bearing plate and clutch bearing cell of static load test on composite foundation was set up.The results show that it is feasible to use clutch bearing cell in static load test on composite foundation.Based on building a reaction platform,static load test on composite foundation and enhanced single pile can be completed successively.Compared to the conventional bearing plate,the final settlement amount of enhanced single pile decreased about 35.87%.Meanwhile,bearing capacity of enhanced single pile is closed to the actual carrying character of single pile on composite foundation.The method of static load test on composite foundation based on clutch bearing cell improve the conditions of static load test.It is scien-tific and reasonable to determine the bearing capacity of composite foundation.

关 键 词：静载荷试验 复合地基 离合式承压箱 

分 类 号：TU47[建筑科学—结构工程]