摘要
对扬州市"春江花月夜"实景演出改建工程加卸载引起的下伏既有瘦西湖隧道变形规律进行监测与分析.测试结果表明,卸载范围内的地表土体出现隆起现象,而岸边土体发生轻微沉降;由于隧道拱顶上方竖向土压力减小,隧道拱顶发生轻微上浮;隧道收敛变形呈水平向压缩、竖向拉伸模式.隧道上方加载后,隧道上述变形向相反趋势发展.本次监测到的既有瘦西湖隧道变形均较小,表明改建工程建设加卸载对下伏既有瘦西湖隧道影响在可接受范围之内.
The deformation of Slender West Lakeshield tunnel caused by loading and unloading of 44Moonlit Night＂ stage reconstruction was measured. The results show that surface soil within the scope of the unloading area upliftand the soil outside of unloading area subsidence. Reducing of earth pressure on top of the vertical tunnel vault results in the tunnel vault floatingslightly. The tunnel convergence deformswith a horizontal compression and a vertical stretch mode. After loading on the top of the tunnel, the tunnel deformation has an opposite trend. The measured deformation of Slender West Lake tunnel is small, which suggestthat the influence ofstage reconstructionon the Slender West Lake Tunnel existing underlying is within an acceptable range.
出处
《南京工程学院学报（自然科学版）》
2016年第4期61-64,共4页
Journal of Nanjing Institute of Technology(Natural Science Edition)
基金
江苏省建设系统科技指导项目
关键词
卸荷
盾构隧道
地表沉降
拱顶沉降
周边收敛
unloading
shield tunnel
surface subsidence
crown settlement
convergent deformation
