软土地区相邻深大基坑间有限土体土压力研究  

Study on Limited Soil Pressure Among Adjacent Deep Foundation Pits in Soft Soil Area

作　　者：邵鹏 刘念武[1,2] 房凯 黄栩[2] 林强 SHAO Peng;LIU Nianwu;FANG Kai;HUANG Xu;LIN Qiang(School of Civil Engineering and Architecture,Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu,Sichuan 610031,China;Department of Mechanics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]浙江理工大学建筑工程学院,浙江杭州310018 [2]中铁二院工程集团有限责任公司,四川成都610031 [3]山东科技大学力学系,山东青岛266590

出　　处：《建筑施工》2021年第4期691-695,共5页Building Construction

基　　金：浙江省151人才工程项目;国家自然科学基金项目(52078466)。

摘　　要：为了研究邻近超深基坑群同步施工面临的有限土体土压力计算的问题,通过在任意开挖深度处取一土体单元,分析单元体受力情况,运用平衡方程和微分知识等方法,推导出在两基坑中间为有限土体这一条件下,有限土体主动土压力的表达式,以及考虑基坑开挖深度过大,上部土体可能出现的被动土压力的表达式,同时,结合有限元软件Plaxis,验证其合理性。总结的结论和经验可供相关项目借鉴。To study the problem of the calculation of limited soil pressure in the synchronous construction of adjacent ultra deep foundation pit group,the stress of the element is analyzed by taking a soil element at any excavation depth;by using the balance equation and differential knowledge,under the condition that there is limited soil between two foundation pits,the expression of active earth pressure of limited soil is derived,and the expression of the passive earth pressure that may appear on the upper soil is derived considering that the excavation depth is too deep.At the same time,combined with the finite element software Plaxis,its rationality is verified.The summarized conclusion and experience can be used as reference for relevant projects.

关 键 词：基坑群 有限土体 有限土压力 滑裂面 土体加固 弯矩 

分 类 号：TU753[建筑科学—建筑技术科学]