摘要
文章针对上海某道路隧道进行研究,采用土弹簧-连续梁模型评估新建机场绕滑道对既有盾构区间的影响。评估结果及实测沉降数据吻合度高,堆载引起的隧道最大附加变形为7~8 mm,通过3次样条插值函数拟合沉降曲线得到隧道曲率半径最小处为5×10^(4) m,均满足现行规范要求。结构检测报告表明,主体结构未受损,但堆载影响区段范围内隧道病害突出,导致养护维修费用及频次提高,建议后续类似交叉工程考虑换填等措施,从而实现零加载。
This paper studies a road tunnel in Shanghai,and uses the soil spring-continuous beam model to evaluate the influence of the newly-built airport end-around taxiway on the existing shield interval.The evaluation results are in good agreement with the measured settlement data.The maximum additional deformation of the tunnel caused by the overburden is 7-8 mm and the minimum curvature radius of the tunnel is 5×10^(4) m obtained by fitting the settling curve with the cubic spline interpolation function,which both meet the requirements of the current specification.The structural inspection report shows that the main structure is not damaged,but the tunnel disease in the range of the overburden-affected section is prominent,which leads to the increase of maintenance cost and frequency.It is suggested that the subsequent similar cross-engineering should consider measures such as replacement,so as to achieve zero loading.
作者
陈凯
CHEN Kai(Shanghai Urban Construction Design and Research Institute(Group)Co.,Ltd.,Shanghai 200125,China)
出处
《工程技术研究》
2025年第6期4-7,共4页
Engineering and Technological Research
关键词
道路隧道
堆载
土弹簧-连续梁模型
沉降分析
隧道病害
road tunnel
overburden
soil spring-continuous beam model
settlement analysis
tunnel disease
