冻结条件下盾构掘进引起建筑物位移特征研究  

Research on Displacement Characteristics of Buildings by Shield Tunneling Under Freezing

作　　者：金昕 刘会丰 宋景东 安建永[3] 雷海波 管晓明[1] Jin Xin;Liu Huifeng;Song Jingdong;An Jianyong;Lei Haibo;Guan Xiaoming(College of Civil Engineering,Qingdao Technological University,Qingdao 266033,China;Beijing Municipal No.3 Construction Engineering Co LTD,Beijing 100022,China;China Construction Second Engineering Bureau LTD,Beijing 100016,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]北京市市政三建设工程有限责任公司,北京100022 [3]中国建筑第二工程局有限公司,北京100016

出　　处：《市政技术》2022年第2期74-79,共6页Journal of Municipal Technology

基　　金：山东省重点研发计划(公益类)项目(2019GSF111027)。

摘　　要：盾构掘进过程中不可避免地会遇到下穿既有建(构)筑物等情况,因此对于建筑物的竖向位移和倾斜的控制尤为重要。通过建立数值模型模拟盾构掘进过程,分析盾构掘进过程中建筑物竖向位移的数值模拟结果与现场实测结果,得出了在冻结层和非冻结层进行盾构掘进引起建筑物产生竖向位移的原因;通过模拟盾构掘进过程,预测了后续掘进过程中建筑物的竖向位移结果;根据数值模拟结果计算得出建筑物的最大倾斜率,并进行安全性分析;提出在盾构掘进过程中为控制建筑物竖向位移所采取的盾构掘进控制措施。During the construction process of shield tunneling, it is inevitable to pass through existing structures. It is particularly important to control the vertical displacement and inclination of buildings. In this paper, the numerical model is established to simulate the shield tunneling process, and numerical simulation results of the vertical displacement data of buildings and field measurement one are analyzed. The causes of vertical displacement of buildings caused by shield tunneling in frozen and non-frozen areas are obtained. The vertical displacement results in subsequent tunneling are predicted by simulating the shield tunneling process. According to the numerical simulation results,the maximum inclination rate is calculated and the safety analysis is carried out. In addition, the shield tunneling control measures for controlling the vertical displacement of buildings during shield tunneling are proposed.

关 键 词：盾构隧道 冻结法 数值模拟 竖向位移 建筑物倾斜 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]