摘要
隧道正交穿过滑坡体时,会同时诱发滑坡体移动和隧道变形增大的不利局面。为了研究两者的相互作用影响,增加对滑坡体和隧道变形的认识,从隧道开挖位置与滑动带垂直距离的角度出发,结合特克斯隧道现场滑坡体与隧道的地质情况,设计了4种不同工况下的模型试验,模拟隧道开挖造成滑坡体移动后,滑坡体滑动对其正交下穿隧道的变形影响,分析研究了滑坡体下穿隧道顶部距滑动带的垂直距离对两者相互作用的规律,得出以下结论:(1)当隧道开挖位置距离滑坡体较近时,隧道开挖引起的滑坡体移动和随之造成的隧道变形具有明显的空间效应,在距隧道掌子面1 D(D为隧道开挖宽度)范围内,开挖扰动作用明显;(2)滑坡体与其正交下穿隧道相互作用的临界影响深度在3 D左右,此时两者相互作用很小,隧道开挖对上方滑坡体没有扰动影响。
When the tunnel crosses the landslide orthogonally,it will induce the unfavorable situation of the landslide movement and the tunnel deformation increase.In order to study the interaction between the two,increase the understanding of the deformation of the landslide and the tunnel,and provide reference for the design and construction of the tunnel,from the perspective of the vertical distance between the tunnel excavation position and the sliding belt,combined with the geological conditions and the landslide of the Turks tunnel,the model tests under four different working conditions are designed to simulate the deformation of the landslide after the landslide movement,and the deformation of the landslide under the tunnel is analyzed.The vertical distance between the top of the tunnel and the sliding belt on the law of the two has reached the following conclusions:(1)when the tunnel excavation position is closer to the landslide,the landslide disturbance caused by tunnel excavation and the consequent tunnel deformation have obvious spatial effect,and the excavation and disturbance action is obvious in the range of 1 D(Dis the tunnel excavation width)from the tunnel face.(2)The critical influence depth of the interaction between the landslide and its orthogonal tunnel is about 3 D.At this time,the interaction between the two is very small,and the tunnel excavation has no disturbance effect on the upper landslide.
作者
巩悦
晏长根
于澎涛
石玉玲
包含
许江波
GONG Yue;YAN Chang-gen;YU Peng-tao;SHI Yu-ling;BAO Han;XUJiang-bo(School of Highway,Chang’an University,Xi’an 710064,China;Zhengzhou Communications Planning Survey and Design Institute,Zhengzhou 450042,China;School of Geological Engineering and Geometries,Chang’an University,Xi’an 710064,China)
出处
《公路》
北大核心
2020年第7期315-319,共5页
Highway
基金
甘肃省交通运输厅科研项目,项目编号2017-002
国家自然科学基金资助项目,项目编号41702334
中央高校基本科研业务费专项资金资助项目,项目编号300102218412。
关键词
正交下穿隧道
滑坡体
垂直距离
模型试验
相互作用
orthogonally crossing beneath tunnel
landslide
vertical distance
model test
interaction
