摘要
为了分析在打桩振动作用下既有隧道的动力响应,在验证某工程实际的基础上,采用有限元软件基于桩–土–隧道动力相互作用模型,对打桩施工引起邻近既有隧道的响应问题进行数值计算,分析在不同打桩距离情况下既有隧道的振动速度、最大总位移和弯矩响应及规律。建议打桩施工过程中加强既有隧道打桩侧1/4拱的振动监测,加强既有隧道拱顶的总位移监测,打桩施工前判断是否对既有隧道打桩侧起拱线附近进行加固处理,为类似实际工程问题提供参考。
In order to analyze the dynamic response of the existing tunnel under the action of pile driving vibration, on the basis of verifying the actual project, the finite element software is used to calculate the response of the adjacent existing tunnel caused by pile driving construction based on the pile soil interaction model. Response and regularity of the vibration speed of existing tunnel, the maximum total displacement and bending moment under different pile driving distance are ana- lyzed. As a suggestion, the vibration monitoring of 1/4 side arch of the existing tunnel is strengthened in the process of piling construction, the monitoring of the total displacement of existing tunnel vault is strengthened, and whether need to reinforce the existing tunnel and the side of the arch bridge before piling construction is judged on. It provides reference for similar practical engineering problems.
出处
《四川理工学院学报（自然科学版）》
CAS
2016年第1期76-81,共6页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
打桩振动
既有隧道
动力响应
有限元
桩-土-隧道动力模型
pile driving vibration
the existing tunnel
the dynamic response
finite element
pile-soil-tunnel dynamic model
