境外长大隧洞快速掘进施工技术Speedy Excavation Technology of Long and Big Tunnels in Overseas Projects
杨玉银,陈长贵,陈斌,黄勇,张健鹏,刘志辉
摘要(Abstract)：
为了加快乌干达卡鲁玛水电站尾水隧洞的开挖速度,实现快速掘进,施工中采用了水平V形掌子面、分部楔形掏槽、合理炮孔布置、自卸车两侧同时装渣、减少出渣运距、加快循环工序等一系列措施。结果表明:这些措施有效提高了开挖速度,加快了开挖进度,创造了施工支洞提前80 d进入主洞,开挖单面月进尺235.2 m(开挖断面54.34 m2);主洞上层开挖单面月进尺257.1 m(开挖断面91.54 m2),主洞下层开挖单面月进尺324.3 m(开挖断面76.27 m2)的好成绩,成功实现了快速掘进,确保了主洞开挖进度满足整个工程总进度工期要求。
关键词(KeyWords)： 爆破方案优化;水平V形掌子面;分部楔形掏槽;快速掘进;卡鲁玛尾水隧洞
基金项目(Foundation):
作者(Author): 杨玉银,陈长贵,陈斌,黄勇,张健鹏,刘志辉
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