城市复杂近接隧道地区新建构筑物安全影响分析  

Safety Impact Analysis of New Structures in Urban Complex Near Tunnel Area

作　　者：杨进京[1] 郭永发[1] YANG Jin-jing;GUO Yong-fa(Kunming Survey,Design and Research Institute Co.Ltd.of CREEC,Kunming 650200,China)

机构地区：[1]中铁二院昆明勘察设计研究院有限责任公司,昆明650200

出　　处：《工程建设与设计》2021年第1期23-25,共3页Construction & Design for Engineering

基　　金：云南省重点研发计划(2018BC008)。

摘　　要：利用有限元分析方法,模拟分析了拟建停车场开挖及加载对其下方既有铁路隧道和北侧既有地铁隧道的影响,得出了停车场修建过程中隧道的变形和受力特征,选取最不利状态结合理论分析对停车场影响范围内既有隧道的安全进行评判。分析结果显示,停车场开挖会加重北侧地铁隧道偏压情况,而针对下方铁路隧道为减载作用。结合理论验算可知,停车场开挖及加载虽然改变了既有隧道原有的受力状态,但衬砌结构受力仍在安全允许范围内。By using the finite element analysis method,the influence of the excavation and loading of the proposed parking lot on the existing railway tunnel under it and the existing subway tunnel in the north are simulated and analyzed.The deformation and stress characteristics of the tunnel during the construction of the parking lot are obtained.The safety of the existing tunnel within the influence range of the parking lot is evaluated by selecting the most unfavorable state combined with theoretical analysis.The analysis results show that the excavation of the parking lot will aggravate the bias pressure of the northern subway tunnel,while the railway tunnel below will reduce the load.Combined with the theoretical calculation,it can be seen that although the excavation and loading of the parking lot has changed the original stress state of the existing tunnel,the stress of the lining structure is still within the safe allowable range.

关 键 词：有限元 数值模拟 隧道 风险评估 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]