龙游牛场古洞室群熨斗形岩柱工程问题探究

Discussion on Engineering Problems of Iron-shaped Rock Pillar of the Niuchang Ancient Caverns in Longyou Grottoes

龙游牛场古洞室群隶属国家重点文物保护单位龙游石窟,该古洞室群蕴含着一系列古工程结构亮点。为研究1号洞熨斗形岩柱的受力特性,文章借助Geomagic软件分别建立设置熨斗形岩柱和矩形等截面岩柱的古洞室群三维模型,然后用Abaqus软件进行有限元网格划分,最后利用FLAC 3D软件对其在自重下的位移和应力进行分析。结果表明:与矩形岩柱相比,熨斗形结构的岩柱对牛场古洞室群的下沉量和应力值有不同程度的降低,原有的熨斗形岩柱更具有稳定性和受力科学性。这证明了古人设置熨斗形岩柱比普通的矩形岩柱更有利于古洞室群的长期稳定。

The Niuchang Ancient Caverns in Longyou belong to the Longyou Grottoes,a national key cultural relic protection unit.The ancient caverns contain a series of highlights of ancient engineering structures.In order to study the mechanical characteristics of iron-shaped rock pillar,with the help of Geomagic software,the three-dimensional models of ancient caverns with iron-shaped rock pillar and rectangular equal-section rock pillar were established respectively,and then the finite element grid division is performed with Abaqus software.Finally,the article used FLAC 3D software to analyze its displacement and stress under own weight.The results show that:compared with the rectangular rock pillar,the iron-shaped rock pillar have different degrees of reduction in the settlement and stress of the Niuchang Ancient Caverns,and the original iron-shaped rock pillar is more stable and scientific.This proves that the iron-shaped rock pillar set by the ancients are more conducive to the long-term stability of the ancient caverns than ordinary rectangular rock pillar.