基坑坑角角度对空间效应影响研究  

Influences of Foundation Pit Angle on Spatial Effects

作　　者：高幸 贾金青[2] 朱彦鹏[3] 王旭春[4] 陈进杰 程良奎[6] GAO Xing;JIA Jinqing;ZHU Yanpeng;WANG Xuchun;CHEN Jinjie;CHENG Liangkui(Hebei Jian Ke Tang Qin BuildingScience and Technology Co.,Ltd.,Tangshan,Hebei 063009,China;The State Key Laboratoryof Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Key Laboratory of Disaster Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;School of Civil Engineering,Qingdao Technology University,Qingdao,Shandong 266033,China;School of Transportation,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Central Research Institute of Building and Construction,MCC Group Co.,Ltd.,Beijing 100088,China)

机构地区：[1]河北建科唐秦建筑科技有限公司,河北唐山063009 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024 [3]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [4]青岛理工大学土木工程学院,山东青岛266033 [5]石家庄铁道大学交通运输学院,河北石家庄050043 [6]中冶建筑研究总院有限公司,北京100088

出　　处：《水利与建筑工程学报》2019年第6期36-40,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(51678112);国家重点研发计划项目(2018YFC1505300-2);河北省科技厅项目(162176486)

摘　　要：现今空间效应的研究多围绕基坑的长、宽、深进行,而忽略了基坑坑角的角度对空间效应的影响。为分析坑角角度与空间效应之间的关联,采用FLAC3D有限差分软件模拟不同坑角角度的基坑开挖,研究发现:任何坑角角度下,空间效应影响系数与坑角距离之间皆呈指数函数关系;当坑角距离与坑边长度的比值大于等于0.3时,任何坑角角度下的空间效应影响系数均大于0.9,其变形接近平面应变状态,当坑角距离与坑边长度的比值小于0.3时,坑角角度与空间效应影响系数呈指数函数关系;最后推导出了空间效应影响系数、坑角距离和坑角角度之间的函数关系,并通过工程实例对其研究结果的合理性进行验证。At present,the research of spatial effect mainly focuses on the length,width and depth of foundation pit,which ignores the influence of the degree of foundation pit angle on spatial effects.In order to analyze the correlation between pit Angle and space effect,FLAC3 D finite difference software was adopted to simulate pit excavation with different degree of pit angle.It is found that at any degree of pit angle,the relationship between the influence coefficient of space effect and the distance of the pit angle is exponential.When the ratio between the distance of pit angle and the length of pit edge is greater than or equal to 0.3,the influence coefficient of spatial effect under any degree of pit angle is greater than 0.9.Its deformation is close to the plane strain state.When the ratio between the distance of pit angle and the length of pit edge is less than 0.3,the relationship between the degree of pit angle and the influence coefficient of spatial effect is exponential.Finally,the function relation between the influence coefficient of spatial effects,the distance of the pit angle and the degree of pit angle is deduced.The rationality of the result is verified by an engineering example.

关 键 词：基坑 空间效应 函数关系 有限差分软件 坑角角度 空间效应影响系数 

分 类 号：TU94[建筑科学—建筑技术科学]