摘要
盾构施工过程中由于土体挖除、管片和二衬设置,将在穿越过程引起机场滑行道和停机坪沉降或隆起,对机场正常运营产生不利影响;通过优化盾构机施工参数,从而降低盾构下穿过程中对机场的不利影响。基于ABAQUS有限元法,建立南京至高淳城际快轨下穿禄口机场复合地层段的有限元模型,分析盾构法施工引起的机场停机坪及滑行道变形特征,最终沉降最大值约为11 mm,最大隆起值约为2 mm,同时得到盾构施工工作参数。对比实际施工监测数据,针对施工风险提出更安全的盾构施工参数。
Due to soil excavation, pipe segment and secondary-lining setting-up, settlement or upheaval of taxiway and parking apron in the airport is likely to be induced especially during the time when shield machine is passing through under the airport, which adversely affects the normal operation of the airport. In this paper, shield construction parameters are adjusted to reduce the adverse effects towards the parking apron and the taxiway. Finite element model of intercity fast track between Nanjing and Gaochun passing through the complex stratum where the Lukou airport is located is established with ABAQUS software. The deformation of the parking apron and the taxiway caused by the construction is analyzed and the data show that the max sedimentation value is 11mm, while the max uplift value is 2mm. Meanwhile, operating parameters of the construction are obtained. Compared with the actual monitoring data, some safer shield construction parameters are recommended against construction risks.
出处
《铁道标准设计》
北大核心
2014年第12期94-98,共5页
Railway Standard Design
基金
国家自然基金资助项目(NSFC41272302)
国家青年科学基金(41102178)
关键词
盾构施工
机场滑行道及停机坪
复合地层
数值计算
变形规律
Shield construction
Taxiway and parking apron of the airport
Complex strata
Numerical calculation
Deformation law
