某超深圆形基坑围护结构优化分析  

Optimum analysis of super deep circular foundation pit enclosure structure

作　　者：赵一行 詹刚毅 李敏[3] 梁新欢 陈昭阳 石钰锋[5,6] ZHAO Yi-xing;ZHAN Gang-yi;LI Min;LIANG Xin-huan;CHEN Zhao-yang;SHI Yu-feng(Henan Communication Construction Management Consulting Co.Ltd.,Zhengzhou 450008,China;Chengdu Southwest Jiaotong University Design Institute Co.Ltd.,Chengdu 610031,China;China Railway Eighteenth Bureau Group Co.Ltd.Fifth Engineering Co.Ltd.,Tianjin 300459,China;Nanchang Rail Transit Group Co.Ltd.Nanchang 330038,China;East China Jiaotong University School of Civil Engineering and Architecture,Nanchang 330013,China;East China Jiaotong University Jiangxi Architectural Design Institute Co.Ltd.,Nanchang 330013,China)

机构地区：[1]河南省通信建设管理咨询有限公司,河南郑州450008 [2]成都西南交通大学设计研究院有限公司,四川成都610031 [3]中铁十八局集团第五工程有限公司,天津300459 [4]南昌轨道交通集团有限公司,江西南昌330038 [5]华东交通大学土木建筑学院,江西南昌330013 [6]华东交通大学江西建筑设计院有限公司,江西南昌330013

出　　处：《兰州理工大学学报》2024年第4期129-134,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(52238009);江西省重点研发项目(20223BBG71018)。

摘　　要：针对佛山市某超深圆形工作井围护结构设计问题,结合地层特点采用数值模拟及现场实测手段对原设计方案进行分析.对围护结构厚度及嵌固深度进行优化分析,探讨相同条件下基坑稳定性随着围护结构厚度及嵌固深度的变化规律.结果表明:开挖面入岩的超深圆形基坑自稳性好,从经济角度考虑,围护结构嵌岩不宜深;足够刚度的内衬墙基础上,较薄的地连墙嵌固很浅也可检算通过,且有较大安全富余,可为相关工程提供参考.Aiming at the design problem of an ultra-deep circular enclosure structure in Foshan City,a numerical simulation combined with field measurements is employed to analyze in light of the geological characteristics.The thickness and embedded depth of the retaining structure were optimized and analyzed,and the variation of the stability of the foundation pit with changes in the thickness and embedded depth of the retaining structure under the same conditions was discussed.The results showed that the excavation face was deep into the rock.The circular foundation pit has good self-stability.From an economic point of view,the enclosure structure should not be embedded in deep rock.Furthermore,it is demonstrated that a relatively thin ground connecting wall,with shallow embedment,can meet safety requirements with considerable safety margins when placed on a sufficiently rigid foundation.These findings offer valuable insights for relevant engineering projects.

关 键 词：超深圆形基坑 围护结构 变形 稳定性 

分 类 号：TU94[建筑科学—建筑技术科学]