软土盾构隧道掘进对邻近浅基础建筑物影响研究
发布时间：2018-10-17 21:08
【摘要】：软土地区盾构隧道施工会对邻近建筑物的变形、内力产生一定程度的影响,造成该影响的因素包括盾构施工工艺、地基特性及建筑物自身特点等。文章以盾构施工轴线上方的浅基础建筑物为研究对象,基于土体损失计算理论,建立了建筑物与基础、地基协同作用的力学模型。结合实际工程,采用1stopt软件求解弹性地基上建筑物弯曲的微分方程,分析了隧道轴线上方建筑物沉降、倾斜以及内力随盾构开挖面位置变化而变化的分布规律。选取建筑物内出现最大正弯矩和最大剪力时的开挖工况,研究土体损失率、建筑物刚度、地基基床系数等引起建筑物内力变化的关键因素及影响规律。研究成果可为今后盾构掘进区建筑物的保护、设计和施工提供理论计算基础。
[Abstract]:The construction of shield tunnel in soft soil area will have a certain degree of influence on the deformation and internal force of adjacent buildings. The factors that cause the influence include the construction technology of shield tunneling, the characteristics of foundation and the characteristics of the building itself, etc. Taking the shallow foundation building above the axis of shield construction as the research object, based on the theory of soil loss calculation, the mechanical model of synergistic action between building and foundation is established in this paper. Combined with practical engineering, the differential equation of building bending on elastic foundation is solved by 1stopt software, and the distribution law of building settlement, inclination and internal force changing with the position of shield excavating surface over the tunnel axis is analyzed. When the maximum positive bending moment and the maximum shear force occur in the building, the key factors and influencing rules of the change of the internal force of the building, such as the loss rate of soil, the stiffness of the building and the coefficient of the foundation bed, are studied. The research results can provide theoretical calculation basis for the protection, design and construction of buildings in shield tunneling area in the future.
【作者单位】： 浙江科技学院土木工程系;浙江大学城市学院土木工程系;杭州地铁集团有限公司;
【基金】：国家自然科学基金项目(51508506) 杭州市科技计划项目(20160533B94)
【分类号】：U455.43
本文编号：2277980
[Abstract]:The construction of shield tunnel in soft soil area will have a certain degree of influence on the deformation and internal force of adjacent buildings. The factors that cause the influence include the construction technology of shield tunneling, the characteristics of foundation and the characteristics of the building itself, etc. Taking the shallow foundation building above the axis of shield construction as the research object, based on the theory of soil loss calculation, the mechanical model of synergistic action between building and foundation is established in this paper. Combined with practical engineering, the differential equation of building bending on elastic foundation is solved by 1stopt software, and the distribution law of building settlement, inclination and internal force changing with the position of shield excavating surface over the tunnel axis is analyzed. When the maximum positive bending moment and the maximum shear force occur in the building, the key factors and influencing rules of the change of the internal force of the building, such as the loss rate of soil, the stiffness of the building and the coefficient of the foundation bed, are studied. The research results can provide theoretical calculation basis for the protection, design and construction of buildings in shield tunneling area in the future.
【作者单位】： 浙江科技学院土木工程系;浙江大学城市学院土木工程系;杭州地铁集团有限公司;
【基金】：国家自然科学基金项目(51508506) 杭州市科技计划项目(20160533B94)
【分类号】：U455.43
【相似文献】
相关硕士学位论文 前1条
1 纪伟杰;隧道爆破开挖引起临近建筑物振动效应研究[D];青岛理工大学;2016年
，本文编号：2277980
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2277980.html
