考虑地下水浮力分布规律某工程地下底板抗浮性能分析  

Analysis of Anti-floating Performance of Underground Floor in a Project Considering Distribution Law of Groundwater Buoyancy

作　　者：杨新峰 刘平[1] 马跃 YANG Xin-feng;LIU Ping;MA Yue(Civil Engineering and Architecture College, Jiangsu University of Science and Technology, Zhenjiang 212100, China)

机构地区：[1]江苏科技大学土木工程与建筑学院,镇江212100

出　　处：《科学技术与工程》2022年第4期1581-1587,共7页Science Technology and Engineering

摘　　要：随着城市建设过程中地下结构的兴起,地下车库有助于解决交通拥挤,但地下水浮力问题的忽视则会造成地下结构上浮、破坏、倒塌。基于位移变化量现场实测与ANSYS APDL数值仿真,对江苏镇江某单建式地下车库底板对比分析,研究其在有无折减工况下的应力与位移情况,计算底板抗浮能力。结果表明:地下车库工程采用大面积地下底板时,计算工况需要考虑地下水浮力的折减效应,且底板中间折减系数大,四周依次递减;而且该规律亦可反映底板的应力、位移分布规律。位移实测结果与地下水浮力折减工况下位移分布规律较为吻合。With the rise of underground structures during urban construction,underground garages can help solve traffic congestion,but the neglect of groundwater buoyancy can cause underground structures to float,damage and collapse.Based on field measurement of displacement variation and ANSYS APDL numerical simulation,the floor of one single-built underground garage was comparatively analyzed which located in Zhenjiang,Jiangsu Province,and its stress and displacement was studied under conditions with or without reduction,then the anti-floating ability of floor was calculated.The results show that when a large area of underground floor is used in the underground garage project,the reduction effect of groundwater buoyancy should be considered in the calculation condition,and the reduction coefficient is large in the middle of the floor and decreases around.Moreover,the law also reflects the stress and displacement distribution of the floor.The measured displacement results are in good agreement with the displacement distribution under the condition of groundwater buoyancy reduction.

关 键 词：地下底板 结构位移 水浮力折减 抗浮计算 数值模拟 

分 类 号：TU926[建筑科学—建筑设计及理论]