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| 爆破施工隧道围岩稳定性研究 | |
| 引用本文： | 傅洪贤,赵勇,谢晋水,侯永兵,夏洪昌.爆破施工隧道围岩稳定性研究[J].中国铁道科学,2011,32(2). |
| 作者姓名： | 傅洪贤 赵勇 谢晋水 侯永兵 夏洪昌 |
| 作者单位： | 1. 北京交通大学,隧道与地下工程教育部工程研究中心,北京,100044 2. 北京交通大学,隧道与地下工程教育部工程研究中心,北京,100044;铁道部工程设计鉴定中心,北京,100844 3. 中铁十四局集团,山东,济南,250014 |
| 基金项目： | 铁道部科技研究开发计划项目(2009G005-C) |
| 摘 要： | 结合贵广铁路棋盘山隧道施工现场测试,研究隧道爆破近区围岩振动规律以及稳定性。对棋盘山隧道掌子面后方拱顶5 m范围内围岩的爆破振动速度进行测试和分析,结果表明:隧道爆破近区围岩的振动传播速度随爆破的比例距离呈幂指数衰减,棋盘山隧道Ⅲ级围岩的幂指数为-0.62。对爆破施工隧道的稳定性研究表明:隧道塌方主要是岩块沿着节理面滑动造成的,与节理面的抗剪强度和岩块的大小及形状相关。最不稳定拱顶位置关键块掉落的临界爆破振动速度,随关键块高度的增大而增大,而随关键块长度和宽度的增大而减小。因此,可根据隧道围岩关键块的形状和位置,计算关键块的临界爆破振动速度,进而得到保证关键块不掉落的炸药量,以控制围岩稳定,确保隧道施工安全。 |
| 关 键 词： | 隧道 爆破施工 围岩 振动规律 稳定性 |
Study on the Stability of the Surrounding Rock of Blasting Construction Tunnel |
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| FU Hongxian,ZHAO Yong,XIE Jinshui,HOU Yongbing,XIA Hongchang.Study on the Stability of the Surrounding Rock of Blasting Construction Tunnel[J].China Railway Science,2011,32(2). | |
| Authors: | FU Hongxian ZHAO Yong XIE Jinshui HOU Yongbing XIA Hongchang |
| Institution: | FU Hongxian1,ZHAO Yong1,2,XIE Jinshui3,HOU Yongbing3,XIA Hongchang3(1.Tunnel and Underground Engineering Research Center of Ministry of Education,Beijing Jiaotong University,Beijing100044,China,2.Appraisal Center of Engineering Design,Ministry of Railways,Beijing100844,3.China Railway 14 Group Corporation,Jinan Shandong250014,China) |
| Abstract: | Based on the field tests of Qipanshan tunnel of Gui-Guang Railway,the stability of the surrounding rock of the tunnel and the blasting vibration law in the area near the tunnel face were studied.The blasting vibration velocity of the surrounding rock within 5 m to the vault behind the tunnel face of Qipanshan tunnel was tested and analyzed.The results show that the blasting vibration velocity of the surrounding rock near the tunnel blasting area is decaying exponentially with the scaled distance of blasting... |
| Keywords: | Tunnel Blasting construction Surrounding rock Vibration law Stability |
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