摘要
为了解决复杂敏感环境下隧洞和基坑开挖的难题,本文结合某抽水蓄能电站项目隧洞开挖工程测试实例,阐述了干冰聚能破岩技术作用机理,提出了与干冰聚能破岩相匹配的最佳封孔方式,探讨了不同地应力条件下干冰聚能破岩技术的破岩效果,重点分析了不同岩体条件下该技术的可行性。工程应用表明:干冰聚能破岩技术对复杂敏感环境下,埋深较浅、应力限制不高的岩体破除需求具有很强的适用性,在炸药受限、机械施工不便的工程条件下,是一种行之有效的破岩手段。
In order to solve the problem of tunnel and foundation pit excavation in complex and sensitive environment,combined with the test example of tunnel excavation engineering of a pumped storage power station project,this paper expounds the action mechanism of dry ice shaped energy rock breaking technology,puts forward the best hole sealing method matching with dry ice shaped energy rock breaking technology,discusses the rock breaking effect of dry ice shaped energy rock breaking technology under different in-situ stress conditions,and focuses on the feasibility of this technology under different rock mass conditions.The engineering application shows that:The dry ice shaped energy rock breaking technology has strong applicability to the rock mass breaking requirements with shallow buried depth and low stress limit in complex and sensitive environment.It is an effective rock breaking method under the engineering conditions of limited explosives and inconvenient mechanical construction.
作者
李敬伟
Li Jingwei(The Fifth Engineering Co.,Ltd.of China Railway First Bureau Group,Baoji,Shanxi 721006,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2023年第6期2045-2054,共10页
Chinese Journal of Underground Space and Engineering
关键词
聚能破岩
硬岩破除
基坑开挖
CO_(2)相变致裂
爆破封孔方式
shaped energy rock breaking
hard rock breaking
foundation pit excavation
CO,phase transformation cracking
blasting hole sealing method
