摘要
为解决高陡危岩体勘查作业中工作效率低、安全风险高和调查存在死角等问题,以某水电工程高位1号危岩体为例,运用贴近摄影测量与地质雷达等技术,搭建一套针对高陡危岩体的调查体系。借助技术手段构建危岩体三维倾斜摄影模型,精准查明危岩体边界条件和工程地质特征;并根据所获取的数据,分析危岩体失稳机理和失稳模式,进行稳定性评价。结果表明:1号危岩体厚约14.1 m,长约27.1 m,凹岩腔最深4.6 m,体积为2210 m 3,属大型危岩体,后缘张拉裂隙发育深度为7.6 m~9.0 m,失稳模式为坠落式;在自然工况、地震工况、暴雨工况下,危岩体稳定性系数分别为1.16、1.08、1.04,分别处于稳定、基本稳定、欠稳定状态。倾斜摄影非接触性测量技术和地质雷达张拉裂缝探测技术,弥补了单一技术在信息获取上的局限性,解决了传统勘查方法工作效率低、安全风险高和调查存在死角等问题,为高陡危岩体的识别和探测提供了新的思路和新方法,对同类高陡危岩体勘查评价具有参考价值。
To solve the problems of low work efficiency,high safety risk and blind spot in investigation in the survey operation of high and steep dangerous rock mass,taking the high-level 1#unstable rock mass of a hydropower project as an example,a survey system for high-steep unstable rock mass is established by using nap-of-the-object photogrammetry and ground penetrating radar.On the one hand,using technological means construct a three-dimensional oblique photography model of the unstable rock mass,which accurately identifies the boundary conditions and engineering geological characteristics of the dangerous rock mass;On the other hand,based on the detailed data obtained conducts in-depth analysis of the instability mechanism and mode of the dangerous rock mass and carry out stability evaluation.The research results show that the thickness of the 1#unstable rock mass is about 14.1 m,the length is about 27.1 m,the deepest concave rock cavity is 4.6 m,and the volume is 2210 m 3,belonging to a large unstable rock mass,The development depth of tension cracks at the trailing edge is 7.6 m~9.0 m,and the instability mode is a falling type;Under natural condition,earthquake condition and rainstorm condition,the stability coefficient of unstable rock mass is 1.16,1.08 and 1.04 respectively,which are in stable,basically stable and under stable state respectively.The results show that the non-contact measurement technology of oblique photography and ground penetrating radar tension crack detection technology used in this article make up for the limitations of a single technology in information acquisition and solve the problems of traditional exploration methods,such as low work efficiency,high safety risks,and the existence of blind spots in the investigation,which provide new ideas and methods for the identification and detection of high-steep unstable rock mass and have reference value for the exploration and evaluation of similar high-steep unstable rock mass.
作者
欧安锋
吴述彧
杨进军
余加松
侯帅
OU Anfeng;WU Shuyu;YANG Jinjun;YU Jiasong;HOU Shuai(Power China Guiyang Engineering Corporation Limited,Guiyang,Guizhou 550081,China;Power China Power Investment Corporation,Lanzhou,Gansu 730030,China)
出处
《水利与建筑工程学报》
2025年第4期185-192,共8页
Journal of Water Resources and Architectural Engineering
基金
贵州省水利厅科技专项经费项目(KT202301)。
关键词
贴近摄影测量
地质雷达
危岩体
裂隙发育深度
稳定性
nap-of-the-object photogrammetry
ground penetrating radar
unstable rock mass
depth of fissure development
stability
作者简介
欧安锋(1996-),男,硕士,助理工程师,主要从事工程地质、水文地质方面的工作。E-mail:ouanfeng_gyy@powerchina.cn;通讯作者:吴述彧(1972-),男(苗族),硕士,正高级工程师,主要从事工程地质、水文地质方面的工作。E-mail:wusy_gyy@powerchina.cn。
