盾构隧道掘进对邻近建筑物影响及变形预测研究

发布时间：2018-05-05 18:05

本文选题：盾构隧道 + 汇源法　；参考：《浙江大学》2014年博士论文

【摘要】：盾构法已成国内外地铁隧道建设的主要施工方法之一,但仍将会对施工影响范围内土体产生扰动从而造成土体位移,变形过大会导致邻近建筑物开裂、倒塌等一系列环境问题。本文采用现场测试法与理论分析法对盾构掘进区域内建筑物变形和受力进行了研究。本文主要创新工作如下： (1)现场测试方面主要包括：对杭州地铁1号线打铁关站—闸弄口站区间工程进行了现场实测,研究了盾构掘进对土体变形及邻近不同基础建筑物的影响,重点实测了盾构下穿短桩基础多层建筑物(第一汽车公司教练大队办公楼)的变形,以及邻近浅基础建筑物(文晖果品市场商铺)及长桩基础高层建筑物(野风现代家园住宅楼)盾构掘进引起的变形。 (2)理论分析方面主要包括： 1)土体变形方面：将盾构掘进引起的土体损失认为由开挖面出土平衡引起的土体损失和盾尾间隙及注浆产生的土体损失,推导了半无限空间三维土体变形计算公式,并给出了修正的Sagaseta地面纵向变形计算公式。 2)纵向变形方面：利用修正的Sagaseta纵向地面变形计算公式,推导出盾构掘进区域浅基础(短桩基础)建筑物地基、基础和结构协同作用的力学模型及理论解。并利用盾构掘进区协同作用力学模型,研究了建筑物刚度、地基基床系数和盾构掘进过程中注浆率等施工参数变化对建筑物变形及内力的影响。 3)横向变形方面：分析了邻近建筑物盾构掘进引起的土体横向的沉降分布规律,并给出了邻近建筑物工况下盾构隧道掘进引起的地表横向沉降预测公式：“塞形分布曲线”、“偏态分布曲线”和“正态分布曲线”预测公式。并编制了可视化软件“邻近建筑物隧道施工影响系统”,进而可以判断隧道掘进引起的地表横向沉降槽大小,以及其对邻近建筑物造成的损坏程度。
[Abstract]:The shield method has become one of the main construction methods of subway tunnel construction at home and abroad, but it will still cause soil displacement caused by disturbance in the influence range of the construction, and the deformation leads to a series of environmental problems such as cracks and collapse of adjacent buildings. This paper uses field test method and theoretical analysis method to construct the building in the shield tunnelling area. The main work of this paper is as follows:
(1) field testing mainly includes:
The field measurement is carried out on the interval project of the Hangzhou subway line 1 line tntun stop station, and the influence of the shield tunneling on the soil deformation and the adjacent buildings is studied. The deformation of the multi storey building under the shield with short pile foundation (the first coach of the first automobile company) and the adjacent shallow foundation buildings are measured. The deformation caused by shield tunneling in the long pile foundation high-rise building (wild wind modern residential building).
(2) the theoretical analysis mainly includes:
1) soil deformation: the soil loss caused by the shield tunneling is considered as the loss of soil loss, the gap between the shield and tail and the loss of soil mass caused by the excavation surface, and the calculation formula of the three-dimensional soil deformation in the semi infinite space is derived, and the modified formula of the vertical deformation of the Sagaseta ground is given.
2) longitudinal deformation aspect: using the modified Sagaseta longitudinal ground deformation calculation formula, the mechanical model and theoretical solution of the synergistic effect of the foundation and structure of the shallow foundation (short pile foundation) in the shield tunneling area are derived, and the stiffness of the building, the foundation bed coefficient and the shield are studied by using the mechanical model of the synergistic action of the shield tunnelling area. The influence of grouting parameters and other construction parameters on the deformation and internal forces of buildings during tunneling.
3) lateral deformation aspect: the lateral settlement distribution law of the soil caused by the shield tunneling of adjacent buildings is analyzed, and the prediction formula of the lateral settlement of the ground surface caused by the shield tunneling under the working condition of the adjacent buildings is given, which is the "plug distribution curve", the "partial distribution curve" and the "normal distribution curve" prediction formula. The visual software "adjacent to the tunnel construction impact system" can be used to determine the size of the lateral settlement trough caused by tunneling and the extent of damage to adjacent buildings.

【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：U455.43

【参考文献】