黄高翔,许国庆,姚强,杨旭,陈星艮,李洪涛

• 1:四川省水利科学研究院
• 2:四川大学水利水电学院

摘要(Abstract)：

钻爆法在隧洞开挖中得到广泛应用，通常采用光面爆破以达到成型质量要求，但在小断面隧洞中，特别是遇到不良地质条件时，受洞内钻孔条件及装药等限制，难以达到理想的轮廓控制爆破效果，从而影响围岩安全稳定，也会导致后期支护及衬砌成本增加。针对上述问题，依托小断面水工隧洞开展现场爆破试验，探究聚能水压爆破技术应用于不良地质小断面隧洞的爆破参数，利用三维激光扫描技术对轮廓开挖质量进行分析与评价，主要结论如下：(1)超欠挖检测结果表明，同种地质条件下，聚能爆破相对于常规爆破可降低超挖量与欠挖量分别为40.8%和54.2%;(2)通过不同炮孔布置方式下的爆破结果对比分析发现，在弧顶与边墙连接处可不布设孔，利用聚能效应控制成型，可减少拱肩处的超挖；(3)在Ⅳ类围岩的粉砂质泥岩和层状砂岩中，壁面平整度受爆破参数影响较小，主要由岩性决定，且层状砂岩相比粉砂质泥岩平整度可提高30%以上。综上所述，在小断面水工隧洞中合理应用聚能水压爆破技术，可有效提高光面爆破下的隧洞壁面成型效果。

关键词(KeyWords)： 聚能爆破;水压爆破;不良地质;小断面隧洞;三维激光扫描

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51809188);; 国家重点研发计划(2023YFC3008305)~~

作者(Author): 黄高翔,许国庆,姚强,杨旭,陈星艮,李洪涛

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