摘要
地铁盾构施工对土层的扰动将导致周围地表及地面古建筑的不均匀沉降,建立其控制标准是国内隧道工程遇到的研究课题之一。针对西安地铁二号线绕穿西安钟楼古建筑问题,建立能够反映钟楼台基青砖及砖土之间接缝和上部木结构的有限元数值模型,采用输入位移边界荷载方法来模拟盾构施工对钟楼古建筑的影响,同时分析了有无隔离排桩下钟楼关键部位沉降量、沉降差、局部倾斜、应力大小及上部木结构构件的内力,并依此确定地层沉降控制标准,为地下开挖经过钟楼等含有木质结构古建筑的相似工程提供参考。
Disturbance of soil layer caused by subway shield-driven tunneling construction may lead to the uneven settlement of surrounding land surface and the ancient architectures on the ground, so that the establishment of its control standard is one of the research projects encountered by the domestic tunneling engineering. With an aim at the ancient architecture problem of Xi＇ an subway No. 2 line passing through around Xi＇ an Bell Tower, it is necessary to establish a FEM numerical model which is able to reflect the joints among the plateform blue bricks and brick-soil and the upper wooden structure of the Bell Tower. The input displacement boundary loading method is adopted to simulate the effect of shield-driven tunne- ling construction upon the ancient architecture of the Bell Tower, and at the same time, the quantity of settlement, the difference of settlement, the local inclination, the magnitude of stress and the inner force of member parts of the upper wooden structure of Bell Tower key component are analyzed in the case of having or non-having isolation row piles, on the basis of which, the control norm for stratum settlement is decided, whereby providing the valuable references for the underground excavation passing through the Bell Tower and the ancient architectures with wooden structures.
出处
《西安理工大学学报》
CAS
北大核心
2013年第3期266-272,共7页
Journal of Xi'an University of Technology
基金
国家自然科学基金资助项目(11002108
51179153)
关键词
西安地铁
钟楼古建筑
沉降控制
数值分析
Xi＇ an subway
Bell Tower Ancient Architecture
settlement control
numerical analysis
