论文部分内容阅读
随着城市地铁进入大规模建设阶段,地铁隧道将侧穿众多基础形式不同的既有建筑物,为了确保建筑物的安全使用及地铁的正常施工,需要在地铁隧道穿越建筑物地基基础施工前对其进行安全性评估。本文结合北京地铁十号线二期盾构隧道侧穿某筏板基础建筑物的工程实例,通过对建筑物现状调查与检测,对建筑物结构体系、倾斜及沉降现状进行评价;利用FLAC3D软件进行数值计算,研究盾构到达建筑物前、通过及离开建筑物三个阶段的地表横向及纵向变形规律;最后综合建筑物地基基础已发生变形和盾构施工将产生的基础附加变形,依据规范提出该建筑物地基基础变形控制标准,据此来指导盾构隧道安全施工。
As urban metro goes into large-scale construction phase, metro tunnels will be flanked by many existing buildings of different basic forms. In order to ensure the safe use of buildings and the normal construction of metros, metro tunnels need to cross the foundation of buildings before construction It carries out a safety assessment. In this paper, based on the engineering example of side-by-side raft foundation building of shield tunnel in the second phase of Beijing Metro Line 10, the status quo of the building is investigated and tested to evaluate the status quo of the structure, inclination and settlement of the building. FLAC3D software Numerical calculation, the study of the shield before and after the arrival of the building through the three stages of the building surface horizontal and vertical deformation law; Finally, the foundation of the composite foundation has been deformed and the foundation construction will be additional deformation generated by the standard The foundation of the building deformation control standards, thus guiding the construction of shield tunnel safety.