摘要
数百年来,在自然应力和人为因素的综合影响下,重庆大足圆觉洞受到不同程度的风化、侵蚀,致使圆觉洞周围岩体构造裂隙和卸荷裂隙极其发育,对圆觉洞顶板的安全构成严重威胁,故对圆觉洞开展变形及稳定性分析研究尤为重要.本文针对圆觉洞围岩稳定性展开研究,通过对圆觉洞工程地质条件、地层岩性以及顶板侵蚀现状进行调查分析;然后利用三维激光扫描点云建模方法,建立圆觉洞高精度三维数值模拟计算模型,开展圆觉洞顶板数值模拟稳定性分析,并对其顶板所存在的最不利位置进行现场稳定性监测,揭示了圆觉洞顶板在自重荷载及行人作用下的变形规律.该研究成果为类似石窟寺等文物保护工程的稳定性分析评价提供了一种新的研究方法.
For hundreds of years,under the combined influence of natural stress and human factors,the Yuanjue Cave has been weathered and eroded to varying degrees.As a result,the rock mass structural fissures and unloading fissures around the Yuanjue Cave are extremely developed,which poses a serious threat to the safety of the roof of the Yuanjue Cave.Therefore,it is particularly important to carry out analysis and research on the deformation and stability of the Yuanjue Cave.In this study,firstly the engineering geological conditions,stratigraphic lithology and current roof erosion condition of the Yuanjue Cave are investigated and analyzed;secondly,a high-precision three-dimensional numerical simulation calculation model of the circular tunnel is established by using the three-dimensional laser scanning point cloud modeling method;and finally,the stability analysis of the numerical simulation of the circular tunnel's roof and site stability monitoring of the most unfavorable position of the roof are carried out to reveal the deformation law of the roof of the Yuanjue cave under the action of self-weight load and pedestrians.The research results provide a new research method for the stability analysis and evaluation of cultural relics protection projects such as cave temples.
作者
陶志刚
陈佳钰
冯太滨
王璇
任树林
TAO Zhigang;CHEN Jiayu;FENG Taibin;WANG Xuan;REN Shulin(State Key Laboratory for Geomechanics and Deep Underground Engineering,Beijing 100083,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China;Dazu Stone Carving Research Institute,Chongqing 402360,China)
出处
《石窟与土遗址保护研究》
2022年第3期99-112,共14页
Research On The Conservation Of Cave Temples And Earthen Sites
基金
第二次青藏高原综合科学考察研究(2019QZKK0708)
岩土力学与工程国家重点实验室开放基金课题(Z020007)
越崎学者专项资金(800015Z1207)
关键词
三维扫描
点云建模
数值模拟
稳定性分析
3D scanning
point cloud modeling
numerical simulation
stability analysis
作者简介
陶志刚(1981-),男,河北省邯郸市人,中国矿业大学(北京)教授、博士生导师,主要从事岩体力学与工程灾害控制领域的教学与研究工作,E-mail:taozhigangslope@163.com
