温岭大型古地下采石场长屿硐天凌霄硐洞室群工程地质条件评价

EVALUATION ON ENGINEERING GEOLOGICAL CONDITIONS OF LINGXIAO CAVERNS AMONG CHANGYUDONGTIAN LARGE ANCIENT UNDERGROUND QUARRY AT WENLING,ZHEJIANG PROVINCE

世界地质公园大型古地下采石场长屿硐天位于浙江省温岭市新河镇。据调查,这一由28个洞室群,占地面积约16km^2的大型古地下采石场的采石史可追溯到1500a前的南北朝。凌霄硐洞室群是上述28个洞室群之一。其主洞的高度、跨度分别达55m和28m。问题是这些巨型洞室何以千年不倒,为了回答这一问题,也为了为这些重要古洞室的保护和安全旅游提供基础资料,本文开展了以凌霄硐为例的有关长屿硐天大型古洞室群的工程地质条件的研究。

Changyudongtian World Geological Park,an ancient underground quarry cavern group,is located at Wenling City,Zhejiang Province.Based on the field investigation,the quarry were excavated by the ancients, which can be traced back to 1500 years ago,in a hill with the coverage of 16 square kilometers.Among of 28 large underground cavern groups in the underground quarry,Lingxiao cavern group is one typical example,with the height and span more than 55m and 28m respectively,for its main cavern.To clarify the reasons of long-term stability of these ancient caverns,the authors have carried out the study on the engineering geological conditions of the caverns,taking Lingxiao cavern group as an example.The achievements also accumulate the important geological documents for the protection of Changyudongtian ancient underground cavern groups and the safety guarantee of the tourists.