摘要
为解决隧道爆破施工中存在的超欠挖问题,减小爆破振动对围岩的破坏,文章以岳圩1号隧道为研究对象,采用现场监测的方法分析聚能水压爆破作用机理及损伤演化过程,并且对聚能水压爆破技术进行了分析与总结。研究结果表明:炮泥堵塞会导致应力在孔内部积聚并逐渐增强,进而影响到整个孔道内的应力波及作用时间,从而决定了爆破破碎的范围和程度;上部水压力聚能爆破后,损伤区的分布较为均匀,而下部结构在遭受水压力聚能爆破时,损伤区主要出现在孔口和孔底;当围岩达到稳定时,左右线隧道拱顶变形最大,在施工过程中应着重关注拱顶变形情况。
To address the issues of over-excavation and under-excavation in tunnel blasting construction and mitigate the damage caused by blasting vibrations to the surrounding rock,this study takes the Yuewei No.1 Tunnel as the research subject.Using field monitoring methods,it analyzes the mechanism of focused hydraulic blasting and the evolution of damage,while also summarizing the focused hydraulic blasting technology.The findings indicate that mud plugging in the borehole leads to stress accumulation and gradual intensification within the hole,subsequently affecting the stress waves and duration throughout the borehole,which determines the extent and scope of blasting fragmentation.After focused hydraulic blasting in the upper section,the damage zone exhibits relatively uniform distribution,whereas in the lower structure,damage zones primarily appear at the borehole entrance and bottom.When the surrounding rock stabilizes,the deformation at the tunnel vault is most pronounced,necessitating heightened attention to vault deformation during construction.
作者
陈文达
CHEN Wen-da(Jiangsu Branch of China Communications Third Harbor Engineering Co.,Ltd.,Lianyungang 222000,Jiangsu China)
出处
《建筑机械》
2026年第1期309-314,共6页
Construction Machinery
关键词
隧道爆破
聚能水压
现场监测
应力
位移
tunnel blasting
energy-concentrated water pressure
on-site monitoring
stress
displacement
