| 盾构隧道孤石预爆破地表质点峰值振速衰减公式 |
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| 作者单位： | ;1.华侨大学岩土工程研究所;2.福建省隧道与城市地下空间工程技术研究中心;3.厦门爆破工程公司 |
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| 摘 要： | 为了解决盾构隧道孤石预爆破中,不同炸药的性质和药包埋深对质点峰值振动速度的影响,对岩石爆破中地表质点峰值振动速度衰减公式进行了改进,基于叠加原理获得能同时考虑装药结构、岩性特性参数等影响因素的长柱药包峰值振动速度公式,并通过工程实例验证了该公式的有效性。结果表明:长柱形装药地下爆破引起的峰值振动速度不仅受测点与爆源距离影响,也受到装药结构的影响;在装药长度不变条件下,长柱药包的埋深对与爆心水平距离25m范围内峰值振动速度影响较大,超出25m范围受到的振动影响程度趋于一致。
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| 关 键 词： | 地铁 盾构 隧道 衰减公式 孤石爆破 长柱药包 峰值振速 |
Attenuation formula of peak vibration velocity of ground particle in pre-blasting of boulder in shield tunnel |
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| Affiliation: | ,Research Institute of Geotechnical Engineering,Huaqiao University,Fujian Tunnel and Urban Underground Space Engineering Technology Research Center,Xiamen Blasting Engineering Company |
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| Abstract: | In order to solve the influence of the properties of different explosives and the burial depth on the peak vibration velocity of the particle in the pre-blasting tunnel boulder,the attenuation formula of the peak velocity of the surface particle in rock blasting was improved.Based on the superposition principle,charge structure,and lithological characteristics of the rockburst,the vibration velocity formula of the long pillar was also given.The results showed that the peak vibration velocity of the long columnar charge was not only affected by the distance between the measured point and the burst source,but also by the structure of the charge.Under the same charge length,the depth of the long cylindrical charge 25 min the range of the impact on the peak vibration velocity was greater,the impact on vibration was basically the same over 25 m. |
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| Keywords: | Subway Shield Tunnel Boulder blasting Long cylindrical charge Peak vibration velocity |
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