大面积堆载作用下港口干煤棚结构设计与研究  

Structural design and research on port dry-coal shed under large area surcharge load

作　　者：田磊 蔺雪峰[2] 黄彦军 TIAN Lei;LIN Xuefeng;HUANG Yanjun(Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100082,China;CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China;Beijing Urban Construction Group Co.,Ltd.,Beijing 100088,China)

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082 [2]中交水运规划设计院有限公司,北京100007 [3]北京城建集团有限责任公司,北京100088

出　　处：《建筑结构》2023年第13期79-86,共8页Building Structure

摘　　要：为研究软弱场地土条件下柱面网壳支座荷载和大面积堆载作用下干煤棚桩基受力与变形特性,通过某工程实例,进行了软弱场地土条件下干煤棚上部结构的内力分析,并对网壳支座荷载和大面积堆载作用下桩身变形进行了理论计算和有限元分析,对结果进行了分析比较。结果表明,按角点法和等效土层厚度法计算的桩顶水平位移接近;软弱土地质情况下规范理论设计方法仅能较好地反映荷载作用下距离桩顶4/α范围内桩身位移的变化,桩承台有限元分析可反映大面积堆载作用下整个桩身变形和受力特性;根据计算得到的桩顶位移可近似换算出上部柱面网壳支座处的水平位移,可以此作为上部网壳支座荷载的设计依据。In order to study the stress and deformation characteristics of pile foundation of dry-coal shed under the support load of cylindrical latticed shell and large area surcharge load for the geological conditions of soft weak soil,the internal force of upper structure was analyzed basing on the actual engineering example,and the theoretical calculation and finite element analysis of pile deformation under the support load of cylindrical latticed shell and large area surcharge load were carried out and the results were analyzed and compared.The results show that the horizontal displacement of pile top calculated by corner method are consistent with those by equivalent soil layer thickness method.In the case of geological conditions of soft weak soil,The standard theoretical design method can only reflect the change of pile body displacement within 4/αrange from the pile top under the action of load and the finite element analysis can reflect the deformation and mechanical characteristics of the whole pile body under large area surcharge load.According to the calculated displacement of the pile top,the horizontal displacement at the support of the upper structure can be approximately converted,which can be used as the design basis for the support load of the upper cylindrical latticed shell.

关 键 词：干煤棚 软弱土 大面积堆载 桩身变形 桩身受力 

分 类 号：TU37[建筑科学—结构工程]