Vibration response analysis of gas pipelines caused by tunnel blasting
To study the dynamic response characteristics of gas pipelines under mining method tunnels,based on the case of DN219 gas pipelines under the Qingyi West Hospital Station Tunnel of Qingdao Metro Line 6,a numerical model of rock soil tunnel gas pipeline was established using MIDAS/GTS NX finite element analysis software,and the reliability of the numerical model was verified with monitoring data.Establish numerical models for pipelines subjected to gas pressures of 0,1.6,2.4,and 3.6 MPa,and study the dynamic response characteristics of gas pressure on pipelines under blasting action.Combined with the safety threshold of pipeline vibration velocity,the safety threshold of surface vibration velocity is determined to be 0.489 cm/s.Through the Sadovsky fitting formula,the maximum single explosive dosage is 9.65 kg,providing reference for the design and construction of actual engineering.
dynamic responsenumerical simulationgas pipelinesafety thresholdmaximum single explosive dosage
万方数据
维普
