摘要
水平声波剖面法(Horizontal Sonic Profiling,HSP)作为一种新兴的盾构隧道预报技术,虽已取得初步成效,但尚未形成统一的技术实施规程。本研究以高原地区某盾构隧道工程为背景,系统优化了HSP数据采集流程,确立了“选取锚杆-安装采集检波器-布置背景检波器-数据采集”四个关键环节的技术规程。在数据处理阶段,采用200~2000 Hz主频区间进行数据反演,成功获取二维及三维预报成果,并且以归一化能量80%作为风险区段划分阈值,有效识别潜在地质灾害区段。经100次预报实践与现场验证结果表明,基于本技术规程所获预报成果中,围岩等级预报准确率达到99.0%,剥落风险区段预报准确率为70.66%。该研究成果为盾构隧道施工提供了可靠的地质预警手段,对提升复杂地质条件下隧道施工安全性具有重要的实践意义。
The horizontal sonic profiling(HSP)method,as an emerging prediction technology in shield tunneling,has demonstrated preliminary effectiveness;however,a unified technical implementation protocol has not yet been established.This study is set against the background of a shield tunnel project in a plateau area,where the HSP data acquisition process was systematically optimized.A technical protocol comprising four key steps—“selecting anchor bolts,installing acquisition geophones,deploying background geophones,and data acquisition”—was established.During the data processing phase,data inversion was performed within the main frequency range of 200~2000 Hz,successfully yielding two-dimensional and three-dimensional prediction outcomes.By using 80%normalized energy as the threshold for identifying risk zones,potential geohazard sections were effectively identified.The results from 100 prediction instances and field verifications indicate that the prediction outcomes based on this technical protocol achieved an accuracy of 99.0%in surrounding rock classification and 70.66%in the identification of spalling risk zones.This research provides a reliable geological early warning method for shield tunnel construction,offering significant practical value for enhancing construction safety under complex geological conditions.
作者
郭鼎一
Guo Dingyi(Gansu Railway Comprehensive Engineering Survey Institute Co.,Ltd.,Lanzhou Gansu 730070,China)
出处
《工程地球物理学报》
2025年第5期393-400,共8页
Chinese Journal of Engineering Geophysics
基金
国家重点研发计划项目“川藏铁路”重点专项(编号:2021YFB2300500)。
关键词
水平声波剖面
隧道工程
超前地质预报
施工风险控制
horizontal sonic profiling
tunnel engineering
advance geological forecast
construction risk control
