某高层建筑桩基下溶洞顶板的FLAC3D数值模拟  

FLAC3D numerical simulation of cavern roof under pile foundations of a high-rise building

作　　者：苗博泉 赵旺 MIAO Boquan;ZHAO Wang(Guiyang Engineering Corporation Limited,Power China,Guiyang 550081,China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《贵州科学》2021年第6期91-96,共6页Guizhou Science

摘　　要：随着国家基础设施建设的持续推进,越来越多的高层建筑在岩溶地区兴建,岩溶地区高层建筑常采用桩基础穿透溶洞,但遇溶洞尺寸较大、埋深较深等工况时,穿透溶洞往往造成成桩困难、基础施工不经济合理等问题,所以研究将高层建筑桩基作用在溶洞顶板岩层之上是否可行这一课题具有重要的理论意义和实用价值。论文结合深圳市坪山新区某高层住宅工程项目,采用有限差分软件FLAC3D对高层建筑桩基下的溶洞顶板岩层进行了静荷载下的数值模拟,计算结果表明,从应力、应变、位移和塑性区分布等多方面分析,溶洞顶板岩层均处于稳定状态,能够满足高层建筑的正常使用要求。With the accelerating infrastructural construction,more and more high-rise buildings are constructed in karst areas.High-rise buildings in karst area usually use pile foundations to penetrate karst caves,but when the cave is large in size and deep in depth,it often causes problems such as difficulty in pile forming and uneconomical foundation construction.So study on the feasibility of putting pile foundations in the cavern roof has important theoretical significance and practical value.In this paper,a high-rise residential building project in Pingshan New District in Shenzhen is selected as the study site.Numerical simulation under static load is carried out for the cavern roof under pile foundations using FLAC3D.The calculation results show that the cavern roof is stable in the aspects of stress,strain,displacement and plastic zone distribution,and can meet the requirements of normal use of the high-rise building.

关 键 词：溶洞顶板 高层建筑 桩基 数值模拟 

分 类 号：TU473.12[建筑科学—结构工程] TU971[建筑科学—土工工程]