石窟寺多尺度岩体结构发育特征与三维精细化建模方法研究——以安岳圆觉洞为例  

MULTI-SCALE ROCK STRUCTURES DEVELOPMENT CHARACTERISTICS AND 3D REFINEMENT MODELING METHOD OF GROTTOES:A CASE STUDY OF ANYUE YUANJUE CAVE

作　　者：刘长青 包含[1] 兰恒星[2] 吕洪涛 尹培杰 李黎 刘建辉 陈卫昌 LIU Changqing;BAO Han;LAN Hengxing;L Hongtao;YIN Peijie;LI Li;LIU Jianhui;CHEN Weichang(School of Highway,Chan'an University,Xi'an 710064,China;Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;Chinese Academy of Cultural Heritage,Beijing 100029,China)

机构地区：[1]长安大学公路学院,西安710064 [2]中国科学院地理科学与资源研究所,北京100101 [3]中国文化遗产研究院,北京100029

出　　处：《工程地质学报》2024年第6期1904-1915,共12页Journal of Engineering Geology

基　　金：国家重点研发计划项目(资助号:2019YFC1520601);国家自然科学基金项目(资助号:42177142,42041006);中央高校基本科研业务费资助项目(资助号:300102212213)。

摘　　要：石窟寺岩体中发育的结构面尺度多变、分布复杂,对石窟寺长期稳定性造成严重威胁。以安岳圆觉洞为例,由无人机、三维激光扫描仪、探地雷达、相机及人工调查统计形成一套综合探测方法,对石窟寺多尺度结构面参数与空间分布特征开展了系统的分析。结果表明,石窟寺以长大尺度的卸荷裂隙和层理以及中、小尺度的次生风化裂隙为主,洞窟顶板表面与内部的结构面数量均呈现出北侧多于南侧的空间差异性分布特征。分区统计显示顶板结构面的产状符合Fisher分布,不同尺度的结构面均存在有近NW330°的优势走向,具有一致性的发育规律;而结构面的迹长、间距、深度主要服从负指数或对数正态分布。在此基础上,融合Agisoft Metashape—Cloudcompare—Geomagic Studio—HyperMesh—3DEC多软件处理的方法,提出一种针对石窟寺多源结构面信息的三维建模技术,得到了石窟寺岩体结构面数字化分布信息。本文可为石窟寺关键块体和整体稳定性的分析以及加固方案的制定提供依据。The discontinuities developed in grotto rock mass are multiple in scales and complex in distribution,which pose a serious threat to the long-term stability of grotto temples.A set of integrated detection methods formed by UAV,3D laser scanner,ground penetrating radar,camera and manual survey statistics were applied in Anyue Yuanjue Cave,and the parameters and spatial distribution characteristics of multi-scale discontinuities of the grotto temple were systematically analyzed.Results show that large scale unloading fractures and bedding planes as well as medium and small scale weathering fractures are mainly developed in grotto temple rock mass.And the discontinuities on both the surface and interior of grotto roof present a spatially differentiated distribution characteristic of more on the north side than on the south.In addition,the zoning statistics reveal that the occurrence of discontinuities of grotto roof conforms to Fisher distribution,and the discontinuities at different scales develop a trend of nearly NW330°,with a consistent developmental rule.While the trace length,spacing,and depth of discontinuities mainly obey the negative exponential or log-normal distribution.On this basis,integrating Agisoft Metashape-Cloudcompare-Geomagic Studio-HyperMesh-3DEC multi-software processing,a 3D modeling technology for multi-source discontinuities information of grotto temple is proposed.Then,the digital distribution information of discontinuities of grotto temple rock mass is obtained.This paper can provide a basis for analyzing key blocks and overall stability of grotto temples,as well as for developing of reinforcement schemes.

关 键 词：石窟寺 岩体结构 无损探测 三维重构 离散裂隙网络模拟 

分 类 号：TU45[建筑科学—岩土工程]