利用现场单桩载荷试验结果识别桩土荷载传递模型参数  

Pile-soil parameters determination method based on single pile loading test

作　　者：马晨光 崔广芹 

机构地区：[1]内蒙古寅岗建设集团有限公司,内蒙古包头014010 [2]内蒙古科技大学土木工程学院,内蒙古包头014010

出　　处：《山西建筑》2018年第3期82-84,共3页Shanxi Architecture

摘　　要：首先建立了一种确定单桩刚度的解析算法,根据桩顶荷载的发展变化过程将桩土受力状态划分为五个阶段,基于桩身的整体平衡关系和边界条件推导了各阶段下桩顶荷载—沉降关系及单桩刚度的解析表达式,这些表达式同传递模型参数有关。然后将现场单桩静载荷试验的Q—s曲线划分为对应的五个阶段,建立实测曲线同理论解析解之间的对应关系,进而逐阶段识别出各模型参数。Basic transfer differential equation and transferring model of load transfer method were given at first,and the pile-soil loading state was divided into five stages according to the increasing pile-head loading process. Next,based on the overall equilibrium of pile and boundary conditions,analytical stiffness expressions of single pile relating to these transferring model parameters were derived in stages. And then,the field static load test result,Q—s curve,was also divided into five corresponding stages and subsection fitting was suggested to be made for each stage. Finally,each model parameter was determined one by one in stages according to the corresponding relations between the measured Q—s curve and the proposed analytical solutions. This pile-soil parameters determination method would enhance the application value of the measured Q—s curve in some extent,and it would provide a theoretical basis for further study on mechanical properties of pile-soil system.

关 键 词：传递函数模型 单桩刚度 Q—s曲线 参数识别 

分 类 号：TU473.1[建筑科学—结构工程]