摘要
应用随机介质理论分析浅埋隧道开挖施工引起的上覆地层纵向移动与变形,将隧道围岩看作一种随机介质,将隧道开挖所引起的上覆岩土体的移动看作一随机过程,从单元开挖引起的地层下沉入手,根据岩土体不可压缩的假定,得到了单元岩土体开挖引起的纵向地层水平移动公式,并据此推导了浅埋隧道开挖施工引起的沿隧道纵向上覆地层下沉、水平移动、倾斜、水平变形以及地层弯曲曲率的计算公式,并给出了圆形以及其它复杂形状隧道开挖横断面的具体计算方法。结果表明:随机介质理论用于计算由于浅埋隧道开挖引起的纵向上覆地层的移动与变形效果良好。
By using the stochastic medium theory, the author analyzes the longitudinal stratum movement and deformation caused by the shallow tunnel construction. The surrounding rock of the tunnel is considered as a stochastic medium and the movement of the top rock and soil brought about by the tunnel excavation is considered a stochastic process. With the stratum subsidence due to unit rock mass excavation and in accordance to the assumption that the rock mass cannot be compressed, we get the formula or the horizontal displacement of the longitudinal stratum caused by the unit rock mass excavation. Then the formulas of stratum subsidence, horizontal displacement, inclination, horizontal strain and the tunnel longitudinal curvature due to nearsurface tunnel excavation are deduced. Also presented are the specific calculated methods for the round and other complicated shaped profiles. It concludes that it is very effective to calculate the stratum movement and deformation in longitude caused by shallow tunnel excavation with the stochastic medium theory.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2003年第4期87-91,共5页
China Railway Science
关键词
隧道
浅埋隧道
上覆地层
影响
随机介质理论
计算
Tunnel
Shallow tunnel
Stratum above the tunnel
Effect
Stochastic medium theory
Calculation
