南京地区基于地铁隧道保护要求的基坑变形控制指标  

Deformation Control Indicator for Deep Foundation Pit Based on Subway Tunnel Protection Requirements in Nanjing Area

作　　者：宋博文 秦会来 王蓉 翟雷[3] 王龙 吕玺琳[1,2] SONG Bowen;QIN Huilai;WANG Rong;ZHAI Lei;WANG Long;LÜ Xilin(College of Civil Engineering,Tongji University,Shanghai200092,China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China;China Construction Second Engineering Bureau Co.,Ltd.,Beijing 100032,China;SGIDI Engineering Consulting(Group)Co.,Ltd.,Shanghai 200093,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]中国建筑第二工程局有限公司,北京100032 [4]上海勘察设计研究院(集团)股份有限公司,上海200093

出　　处：《同济大学学报(自然科学版)》2025年第4期548-556,共9页Journal of Tongji University:Natural Science

基　　金：国家重点研发计划(2016YFC0800200);中建二局科技项目(2021ZX000001)。

摘　　要：为了保障南京软土地区深基坑开挖时邻近地铁隧道安全,有必要提出基于地铁隧道保护要求的基坑施工变形控制指标。基于南京某深基坑工程,开展三维有限元数值模拟,研究了软土深基坑开挖对邻近地铁隧道变形的影响规律。系统性探讨了地铁隧道与基坑相对位置变化条件下隧道变形响应特性,进而提出地铁隧道最大水平位移计算公式。根据地铁隧道保护要求,划分了基坑开挖对隧道的影响区,从而提出基于地铁隧道保护要求的基坑围护水平变形控制标准。In order to ensure the safety of adjacent subway tunnels during deep foundation pit excavation in Nanjing soft soil area,it is necessary to propose control indicators based on protection requirements of subway tunnels.Based on a deep foundation pit project in Nanjing,the effect of deep foundation pit excavation on the deformation of adjacent subway tunnels was studied through 3D finite element numerical simulation.The deformation response characteristics of subway tunnels and foundation pits under the condition of relative position changes were systematically explored,and a formula for calculating the maximum horizontal displacement of subway tunnels was put forward.According to protection requirements of subway tunnels,the impact area of foundation pit excavation on subway tunnels was divided,and then a control standard for the horizontal deformation of foundation pit enclosure based on subway tunnel protection requirements was proposed.

关 键 词：深基坑开挖 地铁隧道 数值模拟 影响区划分 控制标准 

分 类 号：TU447[建筑科学—岩土工程]