电力隧道工作井开挖对既有地铁结构影响分析  

Analysis of the Impact of Excavation of Working Shafts in Power Tunnels on Existing Subway Structures

作　　者：张星伟 张记峰 徐南 陈聪 ZHANG Xingwei;ZHANG Jifeng;XU Nan;CHEN Cong(Guangdong Construction Engineering Quality&Safety Testing Head Station Co.,Ltd.Guangzhou 510500,China;Guangdong Zhonggong Architectural Design Institute Co.,Ltd.Guangzhou 510670,China)

机构地区：[1]广东省建设工程质量安全检测总站有限公司,广州510500 [2]广东省重工建筑设计院有限公司,广州510670

出　　处：《广东土木与建筑》2025年第1期105-107,112,共4页Guangdong Architecture Civil Engineering

摘　　要：为分析电力隧道工作井施工对临近地铁的影响,以某电力隧道工作井为例,通过数值模拟的方式,分析了工作井各开挖工况对地铁车站区间及地铁车站的变形影响。同时为提升评估的准确性,除了计算施工对变形影响外,仍对地铁结构的安全度、基坑开挖降水影响、隧道抗浮影响3个方面进行了专项分析。得到主要结论如下:(1)工作井施工过程中,引起地铁车站区间x方向最大水平位移0.311 mm、y方向最大水平位移0.269 mm、z方向最大竖向位移2.077 mm;引起车站x方向最大水平位移1.599 mm、y方向最大水平位移0.837 mm、z方向最大竖向位移2.422 mm,皆满足相关规范的要求,施工风险可控;(2)工作井施工过程对地铁车站区间暗挖隧道结构、地铁站主体结构的裂缝均控制在规范允许值内;(3)为控制地下水下降对紧邻结构的影响,在工作井施工的过程中,需将地下水位降深控制在2 m以内。To analyze the impact of construction of power tunnel working shafts on nearby subways,takes a certain power tunnel working shaft as an example and analyzes the deformation effects of various excavation conditions of the working shaft on the subway station section and subway station through numerical simulation.At the same time,in order to improve the accuracy of the evaluation,in addition to calculating the impact of construction on deformation,a special analysis was also conducted on the safety of the subway structure,the impact of excavation and dewatering of the foundation pit,and the impact of tunnel anti floating.The main conclusions are as follows:①During the construction of the working well,the maximum horizontal displacement in the x direction,the maximum horizontal displacement in the y direction,and the maximum vertical displacement in the z direction of the subway station section are 0.311 mm and 0.269 mm,respectively;The maximum horizontal displacement in the x direction of the station is 1.599 mm,the maximum horizontal displacement in the y direction is 0.837 mm,and the maximum vertical displacement in the z direction is 2.422 mm,all of which meet the requirements of relevant regulations,and the construction risk is controllable;②The construction process of the work well controls the cracks in the underground tunnel structure and the main structure of the subway station within the allowable values specified in the specifications;③To control the impact of groundwater drawdown on adjacent structures,it is necessary to control the groundwater level drawdown within 2 meters during the construction of the working well.

关 键 词：电力隧道 数值模拟 工作井开挖 降水影响 

分 类 号：TU990.3[建筑科学—市政工程]