隧道掘进爆破震动放大效应试验研究
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摘要
通过渝怀铁路人和场浅埋隧道掘进爆破现场试验,进行隧道特殊位置处质点振动特征研究。以实测振速波形为基础,分析掌子面前后的地表振动速度和隧洞内变断面处的质点振动速度变化规律。对试验研究成果的分析发现,成形隧道对岩体整体结构的改变导致地表振速产生放大效应,使得成洞区地表的振动速度是未开挖区对称位置处的1.310~2.056倍,特别是掏槽爆破的振动放大效应更为明显;在隧道断面由小变大处,同样存在对爆破引起的质点振动速度的放大作用,其放大倍数达1.5~2.1以上。为此,应注意避免隧道掘进爆破的振动放大效应对施工产生的不利影响。
By the field experiment at Ren Hechang tunnel of Yuhuai railway,the characters of vibration velocity resulting from driving blasting have been studied at the special positions of the tunnel.Based on the actual velocity waves,the variation rules of the vibration velocity have been analysed in front of and behind the ground face and at the region with the digging surface changed.There is magnifying effect of vibration velocity in front of and behind the ground face as the rock structure has been changed due to digged tunnel.The vibration velocity behind the ground face is 1.310~2.056 times more than that in front of the ground face.There is also magnification effect of vibration velocity at the region of the digging surface changed from small to large and the magnification is 1.5~2.1 times.So to the magnifying effect more attention must be paid to avoid the damage of the tunnel.
By the field experiment at Ren Hechang tunnel of Yuhuai railway,the characters of vibration velocity resulting from driving blasting have been studied at the special positions of the tunnel.Based on the actual velocity waves,the variation rules of the vibration velocity have been analysed in front of and behind the ground face and at the region with the digging surface changed.There is magnifying effect of vibration velocity in front of and behind the ground face as the rock structure has been changed due to digged tunnel.The vibration velocity behind the ground face is 1.310~2.056 times more than that in front of the ground face.There is also magnification effect of vibration velocity at the region of the digging surface changed from small to large and the magnification is 1.5~2.1 times.So to the magnifying effect more attention must be paid to avoid the damage of the tunnel.
引文
[1]谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281-285.(Tan Zhongsheng,Yang Xiaolin,Wang Meng-shu.Effect of blasting in double line tunnel on existingtunnel[J].Chinese Journal of Rock Mechanics and Engi-neering,2003,22(2):281-285.(in Chinese))
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[3]吴浩艺,刘慧,史雅语,等.邻近侧向爆破作用下既有隧道减震问题分析[J].爆破,2002,19(2):74-76.Wu Haoyi,Liu Hui,Shi Yayu et al.Analysis on the vi-bration reduction in tunnel contour induced by adjacentside blasting[J].Blasting,2002,19(2):74-76.(inChinese))
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[5]郭俊涛.与既有电气化铁路超近距隧道微振动控爆、监测施工技术[J].铁道标准设计,2000,20(8):40-42.(Guo Juntao.Monitoring and controlling technolo-gy for blasting micro-vibration induced by tunnel exca-vation beside existing electrified railways[J].RailwayStandard Design,2000,20(8):40-42.(in Chinese))
[6]Berta G G.隧道爆破震动[J].隧道与地下空间技术,1994,9(2):175-187.(Berta G G.Blasting-in-duced vibration in tunneling[J].Tunnelling and Under-ground Space Technology,1994,9(2):175-187.(inChinese))
[7]张继春.工程控制爆破[M].成都:西南交通大学出版社,2001.(Zhang Jichun.Controlling Technology inEngineering Blasting[M].Chengdu:Southwest JiaotongUniversity Press,2001.(in Chinese))
[8]林学文,王兰民.隧洞的爆破地震动效应问题[J].岩石力学与工程学报,1997,16(3):274-278.(LinXuewen,Wang Lanmin.The explosion seismic effect intunnel[J].Chinese Journal of Rock Mechanics and En-gineering,1997,16(3):274-278.(in Chinese))
[9]张继春,曹孝君,郑爽英,等.浅埋隧道掘进爆破的地表震动效应试验研究[J].岩石力学与工程学报,2005,24(22):4158-4263.(Zhang Jichun,Cao Xiao-jun,Zheng Shuangying et al.Experimental study on vi-bration effects of ground due to shallow tunnel blasting[J].Chinese Journal of Rock Mechanics and Engineer-ing,2005.24(22):4158-4263.(in Chinese))
[10]俊波,崔天麟.浅埋地铁区间爆破振动对地表建筑物的影响[J].世界隧道,2000,(5):28-31.(JunBo,Cui Tianlin.Influences of shallow tunnel blastingvibration on buildings[J].World Tunnels,2000,(5):28-31.(in Chinese))
[2]刘勇,张兴明,朱永全.双跨连拱隧道爆破振动测试[J].石家庄铁道学院学报,1998,11(2):63-66.(Liu Yong,Zhang Xingming,Zhu Yongquan.Blasting vi-bration measurement for continuous-double-arch tun-nel[J].Journal of Shijiazhuang Railway Institute,1998,11(2):63-66.(in Chinese))
[3]吴浩艺,刘慧,史雅语,等.邻近侧向爆破作用下既有隧道减震问题分析[J].爆破,2002,19(2):74-76.Wu Haoyi,Liu Hui,Shi Yayu et al.Analysis on the vi-bration reduction in tunnel contour induced by adjacentside blasting[J].Blasting,2002,19(2):74-76.(inChinese))
[4]赵明阶,许锡宾,刘绪华,等.朝东岩隧道爆破掘进中围岩振动测试与分析[J].重庆交通学院学报,2002,21(2):21-24.(Zhao Mingjie,Xu Xibin,Liu Xuhua etal.Measurement and analysis of the surrounding rock vi-bration during blasting excavation of the Chaodongyantunnel[J].Journal of Chongqing Jiaotong University,2002,21(2):21-24.(in Chinese))
[5]郭俊涛.与既有电气化铁路超近距隧道微振动控爆、监测施工技术[J].铁道标准设计,2000,20(8):40-42.(Guo Juntao.Monitoring and controlling technolo-gy for blasting micro-vibration induced by tunnel exca-vation beside existing electrified railways[J].RailwayStandard Design,2000,20(8):40-42.(in Chinese))
[6]Berta G G.隧道爆破震动[J].隧道与地下空间技术,1994,9(2):175-187.(Berta G G.Blasting-in-duced vibration in tunneling[J].Tunnelling and Under-ground Space Technology,1994,9(2):175-187.(inChinese))
[7]张继春.工程控制爆破[M].成都:西南交通大学出版社,2001.(Zhang Jichun.Controlling Technology inEngineering Blasting[M].Chengdu:Southwest JiaotongUniversity Press,2001.(in Chinese))
[8]林学文,王兰民.隧洞的爆破地震动效应问题[J].岩石力学与工程学报,1997,16(3):274-278.(LinXuewen,Wang Lanmin.The explosion seismic effect intunnel[J].Chinese Journal of Rock Mechanics and En-gineering,1997,16(3):274-278.(in Chinese))
[9]张继春,曹孝君,郑爽英,等.浅埋隧道掘进爆破的地表震动效应试验研究[J].岩石力学与工程学报,2005,24(22):4158-4263.(Zhang Jichun,Cao Xiao-jun,Zheng Shuangying et al.Experimental study on vi-bration effects of ground due to shallow tunnel blasting[J].Chinese Journal of Rock Mechanics and Engineer-ing,2005.24(22):4158-4263.(in Chinese))
[10]俊波,崔天麟.浅埋地铁区间爆破振动对地表建筑物的影响[J].世界隧道,2000,(5):28-31.(JunBo,Cui Tianlin.Influences of shallow tunnel blastingvibration on buildings[J].World Tunnels,2000,(5):28-31.(in Chinese))
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