Study On Dynamic Response And Safety Assessment Of Buried Oil And Gas Pipeline Under The Action Of Punching Load

As an effective transportation,buried pipeline has more and more close relationship with modern industrial manufacture,agricultural production and ordinary life.While large scales of infrastructure such as highways and railways,the disturbance,caused by machine constructing to surrounding ground of buried pipelines,has taken negative infection on the buried pipeline normal use and safe operation.Once the oil and gas pipeline has operation incidence(rupture,tube explosion,leakage),there would bring out server inducing disaster,pollution to the soil and underground water,huge economic loss and casualty and damage to the social product and the people's life,besides the direct loss caused by pipeline system damage.So the study on the influence and control of machine construct impact to adjacent buried pipelines has become a key program in Geotechnical Engineering and pipeline safety protection immediately.In view of this,this article,based on the theory analysis,finite element numerical calculation of mechanical punching loads of buried pipeline by the mechanical properties of conducted a comprehensive study,in order to assess and control the influence of vibration on adjacent buried pipeline.In this paper,a qualitative and quantitative description of the punch load generated by the vibration unit is described.The physical model of the impact load is established,and the analytical expression of the press load is derived theoretically.Based on the wave theory,the propagation characteristic and attenuation rule of shock wave in rock and soil mass are analyzed,and the influence range of vibration wave in soil mass is estimated.Under the consideration of soil function,the model of pipe soil vibration analysis is determined,and the differential equation of vibration of underground oil and gas pipeline under impact load is derived.Using the numerical simulation method,combined with the engineering problems,the finite element model is established to study the natural vibration characteristics and the transient dynamic response of the pipe.Finally,based on the numerical simulation and theoretical analysis,the safety of buried oil and gas pipeline under the action of punching load is evaluated,and it is applied to practical engineering.