The Research Above The Tunnel Blasting Influence On The Structure Of Wan Xing Road Tunnel

This paper based on The Chongqing jiangbei wan xing lu project,the first use of Steve sadove,empirical formula of tunnel blasting vibration field monitoring data of linear regression analysis,then using the finite element software MIDAS/GTS NX corresponding tunnel project of 3D finite element numerical model is established for time history analysis,the research on the different situations across the tunnel construction of blasting load on the existing tunnel surrounding rock and supporting structure of the law of dynamic response.In this paper,the main research contents and research results are as follows:According to field blasting monitoring data,analysis of the blasting seismic wave propagation law,and by using mathematical regression method to get the engineering geological conditions of the value of the parameter ? and K in engineering blasting construction has certain guiding significance in the late.Research Wan Xinglu tunnel structure in tunnel blasting construction above the vibration response of the law.The results show that Wan Xinglu tunnel vault under blasting vibration,the largest and monitoring of horizontal and vertical vibration velocity is greater than need timely monitoring.In the construction process.Wan Xinglu tunnel was studied and the condition of different thickness of primary support line nine different blasting footage conditions,the initial supporting structure response law of blasting vibration velocity.The results show that with the thickness,the greater the initial supporting the monitoring of blasting vibration peak velocity and decreases,and assumes the diminishing marginal effect;Nine lines using blasting footage to expand,the monitoring of blasting vibration peak velocity increasing,and increasing marginal effect.Through the above study optimum blasting footage of the 9th line blasting construction,checking the situation early whether to meet the strength requirement.