發(fā)布時(shí)間：2018-05-07 05:21

  本文選題：地鐵隧道 + 周邊孔爆破��； 參考：《隧道建設(shè)》2017年03期

【摘要】：為了解"短孔卸壓降振法"對(duì)周邊孔最大振速的影響程度,利用多自由面削減能量的原理,首先采用ANSYS-DYNA數(shù)值模擬軟件對(duì)設(shè)置"卸壓短孔"前后的斷面模型進(jìn)行計(jì)算分析,其次結(jié)合現(xiàn)場(chǎng)對(duì)設(shè)置"卸壓短孔"前后的隧道斷面爆破試驗(yàn),提取爆破后的振速圖進(jìn)行對(duì)比論證,從而得出設(shè)置"卸壓短孔"前的斷面爆破振速大于設(shè)置后的斷面爆破振速的結(jié)論。結(jié)果表明:1)使用"短孔卸壓降振法"后,斷面周邊孔振動(dòng)速度有所降低;2)采用"短孔卸壓降振法"進(jìn)行控制爆破后,隧道開挖輪廓線成型平整,超欠挖現(xiàn)象顯著減少。
[Abstract]:In order to understand the influence of "short hole pressure relief vibration method" on the maximum vibration velocity of peripheral hole, the cross section model before and after setting "pressure relief short hole" was calculated and analyzed by using ANSYS-DYNA numerical simulation software, using the principle of reducing energy of multi-free surface. Secondly, combined with the field blasting test of the tunnel section before and after the "pressure relief short hole" was set up, the vibration velocity map after blasting was extracted and compared. It is concluded that the vibration velocity of the section blasting before setting the "pressure relief short hole" is higher than that of the section blasting after setting up. The results show that after using the "short hole pressure drop method", the vibration velocity of the peripheral hole of the section is somewhat reduced. (2) after adopting the "short hole pressure drop method" for controlled blasting, the tunnel excavation contour is formed flat, and the phenomenon of overdigging is significantly reduced.
【作者單位】： 山東科技大學(xué)礦山災(zāi)害預(yù)防控制教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(10672091) 青島]，

本文編號(hào)：1855567