盾构地铁隧道建设对地表文物建筑的影响研究  

Study on the influence of shield metro tunnel construction on historical buildings

作　　者：辛韫潇 Xin Yunxiao(School of Earth Science and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学地球科学与工程学院,南京210023

出　　处：《工程勘察》2021年第2期1-6,30,共7页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目(No.40902076)。

摘　　要：本文以昆明地铁5号线穿越抗战胜利纪念堂文物保护区工程为研究对象,在确定地铁位置和地质条件的基础上,通过Peck经验公式和数值模拟分别研究了盾构隧道在施工和运营过程中对附近文物造成的不利影响。研究结果表明:其影响主要表现在施工阶段开挖产生的沉降和运营阶段列车产生的振动。通过采取选线和结构优化等方式,本项目地铁的沉降量和列车振幅均满足规范要求。盾构开挖产生的沉降量及沉降分布与隧道埋深和工程地质条件有着密切关系,随着上覆土层内摩擦角和隧道埋深的增大,沉降影响逐步减小。列车产生的竖直振动远大于水平振动,且地层分布会影响列车振动的传播。Taking the Kunming Metro Line 5 crossing the WWⅡ Memorial Hall protection project as the study object,based on determining the position of the subway and geological condition,through Peck empirical formula and numerical simulations,the negative effects of shield tunnel on nearby historical buildings in the process of construction and operation are studied. The results show that these impacts are mainly caused by the settlement of excavation in the construction stage and the vibration of trains in the operation stage. By means of route selection and structural optimization,the subway settlement and train amplitude of this project meet the requirements of the codes. The settlement value and distribution of shield excavation are related to the tunnel burial depth and the engineering geological conditions. With the increases of the internal friction angle of overlying soils and the tunnel burial depth,the effects of the settlement gradually decrease. The vertical vibration generated by trains is much larger than the horizontal vibration,and the stratum distribution can also affect the propagation of the train vibration.

关 键 词：地下工程 文物建筑 盾构隧道 地面沉降 列车振动 

分 类 号：TU921[建筑科学—建筑设计及理论]