摘要
在宜万铁路边坡开挖中,选择地质条件、边坡坡度和高度相同的边坡段,在距坡脚以上2.5 m的坡面上,通过跨孔法超声波检测试验,对比预裂爆破与普通小孔径松动爆破对边坡内部岩体的损伤程度,验证预裂爆破对边坡内部岩体的损伤程度明显减轻,普通小孔径爆破产生的岩体松动区比预裂爆破的大1.5倍以上。证明预裂爆破不仅使边坡平整、美观,而且对边坡内部岩体的损伤程度显著降低,更有利于边坡的长期稳定。
During slope excavation of the Yichang-Wanzhou Railway, we choose the sections of slopes of the same geological conditions, the same slope angle and the same height to make cross-hole ultrasonic tests at 2.5 meters above the slope feet. We compare the rock damages caused by pre-split blasting and ordinary small-hole loose blasting. It turns out that the damage to internal rock caused by ordinary small-hole loose blasting is 1.5 times greater than pre-split blasting. It also proves that pre-split blasting results in good formation and beauty of the slope and leads to the minimum damage, which is good for slope stability in the long term.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2008年第3期96-99,共4页
Journal of the China Railway Society
基金
铁道部科技研究开发计划项目(2004G040-B)
关键词
预裂爆破
边坡
超声波检测
岩体损伤
presplit blasting
slope
ultrasonic wave test
rock damage
