大跨度小净距隧道爆破振动影响数值模拟分析

发布时间：2018-07-12 15:21

本文选题：小净距隧道 + 钻爆施工　；参考：《铁道科学与工程学报》2017年03期

【摘要】：结合温州绕城高速屏山隧道小净距段实际工况,应用数值模拟方法对小净距段在爆破荷载作用下的相互影响问题进行研究。研究结果表明:后行隧道爆破施工中应对先行隧道迎爆侧边墙处进行重点监控,且测点应尽量与爆源在相同高度处;对于3车道大断面小净距隧道,后行洞掌子面爆破最大段药量为30 kg时,先行洞二次衬砌发生拉伸破坏的潜在范围约为对应爆破掌子面前后10 m左右,为保证先行隧道二衬结构安全,先行隧道二衬浇注里程应滞后于后行隧道掌子面至少10 m距离以上。结论可为类似小净距段隧道的爆破设计、施工及现场监控量测提供一定参考。
[Abstract]:Combined with the actual working conditions of the small spacing section of the high-speed Pingshan tunnel around the city of Wenzhou, the interaction of the small net distance section under blasting load is studied by numerical simulation method. The results show that: in the blasting construction of the rear tunnel, the key monitoring should be carried out at the side wall of the first tunnel to face the explosion, and the measuring points should be as high as possible as far as possible with the explosion source, and for the three-lane tunnel with large section and small clear distance, The potential range of tensile damage of the secondary lining of the first tunnel is about 10 m before and after the blasting of the second lining of the tunnel in order to ensure the safety of the second lining of the tunnel in order to ensure the safety of the second lining of the tunnel. The pouring mileage of the second lining of the first tunnel should lag behind at least 10 m distance from the face of the rear tunnel. The conclusion can provide some reference for blasting design, construction and site monitoring measurement of tunnel with similar small spacing.
【作者单位】：中交一公局第二工程有限公司;中南大学土木工程学院;
【基金】：国家自然科学基金资助项目(53178505,51408067) “十二五”国家科技支撑计划课题资助项目(2012BAK24802)
【分类号】：U455.6

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