摘要
为研究小净距隧道爆破对临近隧道的影响,本文结合沈海高速公路泉厦扩建工程大坪山隧道施工监测,对小净距隧道中夹岩爆破振动累积损伤进行测试研究。分析了距离掌子面不同位置、爆破次数对中夹岩的累积损伤规律。结果表明:6个测试孔一次爆破和二次爆破后的波速平均降低2.12%;平均爆破累积损伤量为4.3%.研究成果可为类似条件下小净距隧道的现场监测、爆破控制和建立动荷载作用下隧道破坏临界值提供依据。
In order to learn the blast impact on the shared rock in tunnels,the vibration response and cumulative damage of the small interval tunnel were tested and investigated based on the vibration monitoring for the Dapingshan tunnel in Quanxia highway extension project.The influences of the distance from the blast section and the blast times on the cumulative damage of shared rock were analyzed.The results show that,in six test holes,after the first and second blast,the wave velocity reduces to 97.88%,and the average cumulated blasting damage is 4.3%.It can be used as a basis for the blast control,site monitoring and establishing the tunnel damage threshold under dynamic load.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2009年第S2期228-232,共5页
Acta Armamentarii
基金
福建省自然科学基金资助项目(2006J0445)
福建省科技重点课题资助项目(2007H0055)
关键词
小净距隧道
爆破振动
累积损伤
中夹岩
small interval tunnel
blast vibration
cumulative damage
particle vibration velocity
