Study Of Surface Subsidence Control By Wuhan Urban Subway Shallow Tunneling Method Tunnel Construction

As the subway in urban soft rock conditions of large built, Due to the shallow depth of urban traffic shallow tunneling method construction has little effect on, no pollution, no noise etc, in urban subway tunnel construction, shallow tunneling method has increasingly broad development prospects. However urban subway tunnel construction often shallow, circumjacent environment complex, if the surface settlement control is bad, exerted significant surface subsidence, and will be of surrounding ground buildings, roads, pipelines cause damage, and they produce bad social effect, so metro tunnel shallow depth of surface subsidence control method has the important practical significance.This thesis combines Wuhan subway HU-MIN interval shallow tunneling method tunnel construction for engineering background, using the field experiment and the method of combining subsidence monitoring, Analyzes the shallow depth excavation tunnel deformation law of surface subsidence caused by land subsidence and the main influence factors, and the shallow, soft layers, karst these three bad geological conditions under the shallow depth excavation tunnel construction land subsidence big reason is studied and these three poor geological conditions, ground subsidence control effective ways and control effect, and presents the three poor geological conditions, land subsidence control technical measures and management measures. Finally Wuhan subway HU-MIN interval shallow tunneling method tunnel construction bad geological section as an example, the thesis HU-MIN interval shallow depth excavation in tunnel construction meet the above three bad geological conditions caused a shallow buried section, karst section and sudden mud water-inrush events which subsidence oversized question respectively, the land subsidence control scheme and key technologies used in the case, the paper studies the control effect, for the following similar engineering design, construction and research enriched and accumulated valuable experience from it.