【摘要】 位于中国浙江省西部龙游县的龙游大型古地下洞室群由24个洞室组成,该发现引起了国内外有关专家的关注。对该洞室群进行了多次现场工程地质调查,发现该洞室群已产生了程度不一的破坏,其破坏方式主要表现为洞顶及岩柱的破坏。对完整洞室1#～5#洞而言,也存在着一定的安全隐患。调查发现,在这5个洞室内,洞顶、边墙上的裂缝较为发育,其中1#洞洞顶靠近柱子周围部分、1#,2#洞公共墙上、2#洞洞顶以及3#,4#洞西边墙上的裂缝均较为发育,对洞室群的整体稳定极为不利。为了更好地保护这一人类文化瑰宝,采用FLAC3D数值计算,对洞室变形破坏机理进行了研究。在此基础上,以1#,2#洞为例,本着安全第一,整旧如旧的原则,提出了以支顶为主的加固方法。更多还原

【Abstract】 An ancient cavern group was found in Longyou County of Zhejiang Province. It consists of 24 caverns. The finding of it evokes attentions of many scholars in the world. Field investigations were carried out;and it is found that there are many failures in the caverns. The common failures occurs at vault and pillars. There are also some cracks in the sidewalls,vaults and pillars in the integrity caverns No.1–No.5. The vault around 1–1 pillar of cavern No.1,the common wall between cavern No.1 and No.2 and the vault of cavern No.2 etc. all need to be reinforced. In order to protect the caverns,numerical analyses were also done to study the failure mechanism of the caverns. According to the field investigations and numerical analyses and on the basis of“safety first”and “rehabilitation but not change the natural form”,the reinforcement methods were proposed.更多还原