Influence scope of blasting vibration for construction of new tunnel undercrossing existing roads

Wang, Rui; Yuan, Dongyang; Dang, Faning; Lu, Zelin; Yang, Zheng; Yang, Huan; Deng, Xianghui

doi:10.3724/sp.j.1249.2017.03238

Cited by 1 publication

(1 citation statement)

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“…At present, domestic and foreign scholars have done some research on vibration caused by tunnel drilling and blasting construction. Wang et al [9] recorded and analyzed the field monitoring data of a tunnel blasting and concluded that when the main frequency of blasting vibration through the tunnel is less than 50 Hz, the existing highway roads will not produce resonance. Hao et al [10] used LS-DYNA to discuss the changes of vibration velocity and equivalent stress of the surrounding rock caused by different clearance under blasting.…”

Section: Introductionmentioning

confidence: 99%

Research and Analysis on the Influence of Small Clear Distance Drilling and Blasting Method on the Existing Tunnel Structure

Huang

Wang

et al. 2021

Advances in Civil Engineering

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In order to study the vibration influence of tunnel drilling and blasting method on the built tunnel with small clear distance, taking the intersection of Zhuhai Dahengqinshan No. 1 tunnel and Zhuji urban rail tunnel as the engineering background, we used ABAQUS finite element software to conduct numerical simulation analysis on the influence of different blasting loads on existing tunnels with small clear distance in Zhuji tunnel construction. The following conclusions were drawn: the blasting construction of the tunnel under construction had the greatest impact on the vault of the existing tunnel; when the peak load was reduced by half, the stress value, vertical displacement, and resultant velocity of Mises were also reduced by half, which indicates that reducing the peak value of blasting load appropriately can ensure the safety of tunnel construction. When the peak load is 2.7 MPa, the measured and simulated values were less than the resultant velocity limit required by the specification. In addition, the relative error between the measured value and the simulated value was less than 5%, indicating the accuracy of the numerical simulation.

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Section: Introductionmentioning

confidence: 99%