主动支护技术在海东隧洞软岩大变形中的应用
Application of Active Support Technology for Large Deformation in Haidong Soft Rock Tunnel
杨赵峰 1汪波 2杜永全 1黄长宽 1樊勇1
作者信息
- 1. 云南省水利水电勘测设计研究院,昆明 650021
- 2. 西南交通大学,成都 610031
- 折叠
摘要
依托滇中引水工程海东隧洞,选择其3#支洞上游100 m软岩大变形段为试验段开展主动支护技术适应性研究.通过现场张拉试验、松动圈测试、分阶段实施过程,不断优化调整参数,并对控制变形效果、施工进度提升效果、存在的问题等进行分析评价,最后总结形成类似地质条件下的主动支护设计参数和动态调整原则.研究表明:试验段隧洞采用主动支护技术后,竖向沉降和水平收敛均控制在20 cm以内,开挖进尺从每月15m提升至每月45 m,主动支护技术在控制水工隧洞软岩变形量、提高工效等方面有良好的应用效果.
Abstract
Based on the Haidong Tunnel of the Central Yunnan Water Diversion Project,the adaptability of active support technology was studied in the upstream 100 m section of soft rock with large deformations in Branch Tunnel 3.Through on-site tensioning tests,loosening ring tests,and phased implementation,parameters were continuously optimized and adjusted.The control deformation effect,improvement of construction progress,and existing problems were analyzed and evaluated.Finally,design parameters for active support under similar geological conditions and dynamic adjustment principles were summarized.The study shows that after the application of active support tech-nology in the test section of the tunnel,both vertical settlement and horizontal convergence are controlled within 20 cm.The excavation advance rate increased from 15 m per month to 45 m per month.Active support technology has a good application effect in controlling deformation in hydraulic tunnels and improving work efficiency.
关键词
滇中引水工程/海东隧洞/软岩大变形/主动支护/变形控制/进度Key words
Central Yunnan Water/Diversion Project/Haidong Tunnel/Soft rock large deformation/Active support/Deformation control/Progress引用本文复制引用
出版年
2024
NETL
NSTL
万方数据