龙游牛场古地下洞室群岩柱的长期抗拉强度反演
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摘要
在龙游县上畈村附近的牛场有一处由2个洞室组成的古地下洞室群。现场调查发现,在其中1号洞的岩柱1上出现了一条竖直的张开裂缝。据分析,这是上覆岩层对该岩柱施加过大荷载的结果,这一发现为本文研究岩体长期抗拉强度提供了条件。作者即以根据牛场古地下洞室群1号洞内岩柱1的拉裂现象为研究对象,根据最大拉应力论来反演岩体的长期抗拉强度。这不仅对长期强度研究具有理论意义,而且在古工程保护方面也具有应用价值。
Niuchang ancient underground caverns near Shangfan Village,Longyou County are composed of two caverns.Through field investigation,a vertical tensile crack was found in the No.1 rock pillar of No.1 cavern,which resulted from the overloading of upper rock layers.This paper presents the back analysis of the rock mass long-term tensile strength according to tensile cracks in the No.1 pillar,which not only helps to protect ancient engineering sites but also benefits the theoretical research on the long-term strength of rock mass.
Niuchang ancient underground caverns near Shangfan Village,Longyou County are composed of two caverns.Through field investigation,a vertical tensile crack was found in the No.1 rock pillar of No.1 cavern,which resulted from the overloading of upper rock layers.This paper presents the back analysis of the rock mass long-term tensile strength according to tensile cracks in the No.1 pillar,which not only helps to protect ancient engineering sites but also benefits the theoretical research on the long-term strength of rock mass.
引文
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[13]李丽慧,牟会宠,杨志法,等.龙游大型古地下洞室群1~5号洞水文地质与工程地质条件研究[J].工程地质学报,2005,13(2):206~211.L i lihu i,et al..Engineering geological and hydrogeological con-d itions ofNo.1~5 shallow caverns in Longyou.Journal of Engi-neering Geology,2005,13(2),206~211.
[2]长春地质学院编.工程岩土学[M].北京:地质出版社,1980.Changchun Institute ofGeology.Engineering Geotechn ics.Beijing:Geology Press,1980.
[3]杨志法.用追踪法确定连续破坏状态三轴试验的控制参数[J].地质科学,1985,(3):266~273.Yang Zh ifa.D eterm ination of controlling param eter of triaxial testin a state of continual failure by tracing m ethod.Geology science,1985,(3):266~273.
[4]Yang Zh ifa et al..Back-analysis ofV iscoelastic d isplacem ents ina soft rock road tunnel[J].International Journal ofRockM echan-ics&M in ing Sciences,2001,(38):331~341.
[5]杨志法,王思敬,刘怀恒,等.岩土工程反分析原理及应用[M].北京:地震出版社,2002.Yang Zh ifa,W ang S ijing,L iu huaiheng et al..The Geotechn icalEngineering Back Analysis and M ethod.Beijing:Seism ic Press,2002.
[6]刘鸿文,简明材料力学[M],北京:高等教育出版社,2002.L iu Hongwen.Concise M echan ics of Materials.Beijing:H igherEducation Press,2002.
[7]杨志法,李丽慧,牟会宠,等.龙游大型古地下洞室群的工程地质力学研究[J].工程地质力学研究,2004,45~63.Yang Zh ifa,L i L ihu i,Mou hu ichong et al..Engineering geom e-chan ical research on Longyou large ancient underground caverns.Research on Engineering Geom echan ical,2004,45~63.
[8]地质矿产部编.地质专报(一)———区域地质第11号(浙江省区域地质志)[M].北京:地质出版社,1989.Bureau of Geology and M ineral.Resources of Zhejiang Province,Regional Geology Records of Zhejiang Province.Beijing:GeologyPress,1989.
[9]杨志法,王思敬,许兵,等.龙游石窟工程地质条件分析及保护对策初步研究[J].工程地质学报,2000,8(3):292~295.Yang Zh ifa,W ang S ijing,Xu B ing et al..Analysis of engineeringgeology and research on protection strategies of Longyou G rottoes.Journal of Engineering Geology,2000,8(3),292~295.
[10]Itasca Consu lting group,Inc.Fast Lagrangian analysis of contin-ua in 3 d im ensions.USA:Itasca Consu lting G roup,Inc.,1997.
[11]李丽慧,杨志法,张路青,等.关于龙游石窟斜顶“设计”中工程科学问题的探讨[J].岩石力学与工程学报,2005,24(2):336~343.L i L ihu i,Yang Zh ifa,Zhang Luq ing,et al..D iscussion on in-clined roof design of Longyou G rottoes for engineering sciences.Ch inese Journal of Rock M echan ics and Engineering,2005,24(2):336~343.
[12]李丽慧,杨志法,岳中琦,等.龙游大型古洞室群变形破坏方式及加固方法研究[J].岩石力学与工程学报,2005,24(12):2018~2028.L i lihu i,Yang Zh ifa,Yue Zhongq i,et al..D eformation and fail-ure modes and Reinforcem ent m ethods of ancient caverns inLongyou County.Ch inese Journal of Rock M echan ics and Engi-neering,2005,24(12),2018~2028.
[13]李丽慧,牟会宠,杨志法,等.龙游大型古地下洞室群1~5号洞水文地质与工程地质条件研究[J].工程地质学报,2005,13(2):206~211.L i lihu i,et al..Engineering geological and hydrogeological con-d itions ofNo.1~5 shallow caverns in Longyou.Journal of Engi-neering Geology,2005,13(2),206~211.
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