西北水电Issue(4)：122-128,7.DOI:10.3969/j.issn.1006-2610.2024.04.019
土压平衡盾构掘进高瓦斯水工隧洞的HSP法超前地质预报
Advanced Geological Prediction Technology using HSP Method for High Gas Hydraulic Tunnel Excavation with Earth Pressure Balance Shield Tunneling
摘要
Abstract
In response to the technical difficulties of advanced geological prediction in the excavation of high gas tunnels using the earth pressure balance shield tunneling method,based on the discussion of tunnel excavation methods and potential gas escape,the HSP prediction method is a-dopted for advanced geological prediction in high gas shield tunneling construction.The on-site application results show that HSP can obtain good signals of strong reflection in the surrounding rock through shield-breaking rock and soil seismic sources.The detection accuracy for fault fracture zones,karst caves,weak interlayers,and solitary rocks(all with equivalent diameters≥2 m)within a radius of 2 times the tunnel diameter and 100 meters in front of the work face is≥80%,and the positioning error of abnormal bodies is≤3 m;it is possible to comprehensively predict the geological structure and gas status ahead,and then determine the location for opening inspection and tool replacement during atmospheric pres-sure operations,greatly reducing the risk of opening inspection and tool replacement operations.This lays a safety foundation for the Guanmenshan water filling tunnel of the Jiulong Reservoir and can also provide reference for similar projects in the future.关键词
高瓦斯隧洞/土压平衡盾构/超前地质预报/HSPKey words
high gas tunnel/earth pressure balance shield tunneling/advanced geological prediction/HSP分类
天文与地球科学引用本文复制引用
李海龙,肖清华,徐晓峰,韩翔宇,周政杰,袁浩,黄世鹏,杨小春..土压平衡盾构掘进高瓦斯水工隧洞的HSP法超前地质预报[J].西北水电,2024,(4):122-128,7.基金项目
国家重点研发计划(2018YFC0808702-3) （2018YFC0808702-3）
中国水利水电第三工程局有限公司"揭榜挂帅"课题(SDSJ-JL-JS-2023-02). （SDSJ-JL-JS-2023-02）
