矿冶工程
礦冶工程
광야공정
Mining and Metallurgical Engineering
2015年
4期
5-8
,共4页
蔡军%何忠明%林志元%黄自力
蔡軍%何忠明%林誌元%黃自力
채군%하충명%림지원%황자력
隧道%爆破开挖%空洞效应%震动速度%衰减规律
隧道%爆破開挖%空洞效應%震動速度%衰減規律
수도%폭파개알%공동효응%진동속도%쇠감규률
tunnel%blasting excavation%ground void effect%vibration velocity%attenuation law
以某工程隧道为例,基于FLAC3D软件对隧道爆破开挖引起的地表震动效应进行了数值模拟,得出在隧道爆破开挖影响区一定范围内已开挖区域地表质点震动速度是未开挖区域地表质点震动速度的2~5倍,且两者的衰减规律完全不一样。在距掌子面水平距离为5~25 m的范围内,隧道爆破开挖存在明显的空洞效应,若忽视爆破开挖空洞效应现象,则不能确保施工过程中爆破震动的安全性。
以某工程隧道為例,基于FLAC3D軟件對隧道爆破開挖引起的地錶震動效應進行瞭數值模擬,得齣在隧道爆破開挖影響區一定範圍內已開挖區域地錶質點震動速度是未開挖區域地錶質點震動速度的2~5倍,且兩者的衰減規律完全不一樣。在距掌子麵水平距離為5~25 m的範圍內,隧道爆破開挖存在明顯的空洞效應,若忽視爆破開挖空洞效應現象,則不能確保施工過程中爆破震動的安全性。
이모공정수도위례,기우FLAC3D연건대수도폭파개알인기적지표진동효응진행료수치모의,득출재수도폭파개알영향구일정범위내이개알구역지표질점진동속도시미개알구역지표질점진동속도적2~5배,차량자적쇠감규률완전불일양。재거장자면수평거리위5~25 m적범위내,수도폭파개알존재명현적공동효응,약홀시폭파개알공동효응현상,칙불능학보시공과정중폭파진동적안전성。
With some tunnel project as an example, a numerical simulation with software FLAC3D was performed for the surface vibration effect caused by the blasting in tunnel excavation. It is found that within the affected area by blasting excavation in the tunnel, the velocity of ground vibration in the excavated zone is 2~5 times of that in non?excavated zone, with completely different attenuation law for both. An obvious ground void effect will be caused by the blasting excavation in tunnel in the area 5~25 m in the horizontal distance away from the working face. Once ignored, the safety caused by the blasting vibration in the process of construction can not be assured.