Analysis On The Reaction Of The Adjacent Existing Tunnel Under Tunnel Excavation Blasting Vibration

In recent years due to urban tunnel project construction and extension of doubleline railway tunnel engineering construction in engineering, the blasting effects onsurrounding buildings more and more be taken seriously more and more. In theprocess of tunnel construction in cities, because of the large number of building nearthe blast, blasting vibration will affect construction seriously. But considering theeconomic and technical conditions, most of the time we still use blasting construction.In this way, blasting vibration monitoring, and the control of influence of blastingvibration control has become the one of the key contents of project construction.In this paper, based on to Xiangjiapo to Huangjiaoya city highway tunnelengineering in Nanan distract of chongqing, using numerical simulation softwareANSYS/ls-dyna, make a numerical simulation of the blasting construction of the works.Throughthis numerical simulation,we can analysis the key of controlling theblasting vibration and monitor reasonablely, to ensure the reasonable control and ensuresafety of blasting construction.Thesis mainly do the following several aspects:1. Combined with the existing research results about blasting vibration, analysisthe influence factors of blasting vibration to existing tunnel, the paper summarizes thesefactors.2. For danger area,make a numerical simulation using ANSYS/ls-dyna, comparingthe simulation results and the actual results and analysis them.3. Combined with the actual monitoring data of blast， adjust parameter andobserve the effect.4. Monitoring for tunnel blasting, summarizes the existing problems, puts forwardthe Suggestions.