市域铁路隧道上跨原水隧洞的爆破振动空间分布影响研究

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中图分类号：TQ178；TP391 文献标志码：A 文章编号：1001-5922（2025）09-0161-04

Study on the influence of blasting vibration spatial distribution of urban railway tunnel spanning over raw water tunnel

HUANG Lei，SHAO Binlei， WU Yefei， CHENG Xudong （Zhejiang Huazhan Research and Design Institute Co.Ltd，Ningbo 3150Oo，Zhejiang China）

Abstract：To exploreamore effective indirect monitoring scheme for structural vibration velocityof existing tunnels under adjacent new tunnel blasting construction，this studyis based on theactual enginering case of a tunnel in Ningbosregional railway project.Using monitoring data from the construction process，a finite element numerical model was established to simulate thenewrailway tunnel crossing overthe existing original water tunnel，investigatingthe influencing factors of blasting vibration spatial distribution.The results indicated that the presence of " voids"in themediumsignificantlyafectedthespatialdistributionofparticlevibrationvelocityandfacilitates vibrationpropagation.Thespatial distribution of particle vibration velocity wasrelated tothe directionof thevibration load，with the highest propagation eficiency occurring in thedirection toward the load.In practical engineering，a monitoring point behind the blasting point 0.8 times the distance from the existing tunnel to the blasting point can be selected for vibration velocity measurement.

Key Words：tunnel blasting;on-site monitoring;numerical simulation;blasting vibration;vibrational spatial effects

随着城市轨道交通建设的快速发展，各大城市市域（郊）铁路逐渐增多。（剩余5484字）