三维激光扫描技术在桥塔监测上的应用

Application of Three-dimensional Laser Scanning Technology in Bridge Tower Monitoring

为了降低米仓山竖井联络风道的施工难度,加快施工速度,从通风风阻的角度对联络风道取消二衬的可行性进行研究,通过采用FLAC3D软件对右线送风通道风机与隧道间变截面段建模,对在有二衬和无二衬(壁面平滑处理)2种情况下的风道中心面压力和速度大小随入洞距离的变化进行研究。研究结果表明,取消联络风道二次衬砌会增大风道横截面积、减小风速,有助于减小通风摩擦阻力,减少压力损失,最终降低建设成本和运营成本。

In order to reduce the construction difficulty and speed up the construction of the connecting duct in Micang mountain Shaft,the feasibility of eliminating the second lining of the connecting duct was studied from the angle of ventilation resistance.The variable section between the fan and the tunnel in the Right-Line air supply duct was modeled by FLAC3D software.The variation of pressure of central surface and velocity of the air duct with the distance between the holes in the case of the second lining and non-second lining was studied.The results show that eliminating the secondary lining of the connecting duct will increase the cross-sectional area of the duct,reduce the wind speed,help to reduce the friction resistance of ventilation,reduce the pressure loss,and ultimately reduce the construction cost and operation cost.