秦政,陈建伟,李功子,周武,朱慧慧,方星桦,阳军生,张聪

• 1:中国水利水电第十四工程局有限公司
• 2:中南大学土木工程学院
• 3:中南林业科技大学土木工程学院

摘要(Abstract)：

【目的】竖井建设面临的地质条件与周边环境越来越复杂，给施工带来了极大的挑战。针对竖井施工对破碎地层及周边环境影响大，施工风险高等问题，为研究复杂环境下竖井施工方法，【方法】依托以礼河Ⅳ级电站出线竖井工程，从竖井掘进机选型、施工工艺步骤等方面探讨了竖井掘进机与局部爆破开挖组合施工的可行性，通过数值模拟和现场实践研究了该组合施工方法在破碎地层中的适用性。【结果】结果显示：(1)在数值模拟中，竖井开挖后围岩变形量值与围岩塑性区范围均较小，支护结构主应力小于规范限值，结构处于安全状态。(2)现场应用后，出线竖井整体偏斜率和围岩变形量值均符合要求，该方法施工效率较高，且施工过程中未出现井壁失稳现象，竖井成井质量较好。(3)局部爆破对邻近结构物影响较小，邻近结构物的爆破振动速度处于安全范围。【结论】结果表明：竖井掘进与局部爆破开挖组合施工方法在破碎地层竖井施工中具有较好的施工效果，研究可为类似工程提供技术参考。

关键词(KeyWords)： 竖井;破碎岩体;竖井掘进机;局部爆破;组合施工;数值模拟;现场监测

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(52108389);; 湖南省自然科学基金项目(2021JJ41086)

作者(Author): 秦政,陈建伟,李功子,周武,朱慧慧,方星桦,阳军生,张聪

DOI: 10.13928/j.cnki.wrahe.2023.03.009

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