甘肃曲溪地区混合岩化片岩变形特征参数试验研究
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摘要
混合岩化片岩具有各项异性的工程力学特征,通过现场混合岩化片岩刚性承压板法试验,获得了甘肃曲溪地区混合岩化片岩的变形参数,其中微风化混合岩化片岩的弹性参数E_S=12.60GPa、E_0=7.78GPa,弱风化—微风化的混合岩化片岩的弹性参数E_S=1.67GPa、E_0=0.89GPa。研究结果表明:研究区混合岩化片岩的变形,主要是由于其内部孔隙和层理受压所致的压缩形变,变形范围在规范界限之内,满足混凝土重力坝的建设条件。研究结果可为岩体变形特性理论研究与工程应用提供参考。
The Migmatized schist has the anisotropy engineering mechanical properties. The deformation parameters of the migmatized schist in Quxi area of Gansu Province are obtained through the field rigid bearing plate tests. The elastic parameters of the slightly weathered migmatized schist is ES= 12. 60 GPa、E_0= 7. 78 GPa,and the elastic parameters of the weak-moderate weathered migmatized schist of is E_S=1. 67 GPa,E_0= 0. 89 GPa. The results show that the deformation of the migmatized schist in study area is mainly due to the compress deformation of the structural fractures and the pressured bedding. The deformation range is within the specification limits,and the proposed site meets the construction conditions of concrete gravity dam,which could provide the reference for theoretical study and engineering application of rock mass deformation characteristics.
The Migmatized schist has the anisotropy engineering mechanical properties. The deformation parameters of the migmatized schist in Quxi area of Gansu Province are obtained through the field rigid bearing plate tests. The elastic parameters of the slightly weathered migmatized schist is ES= 12. 60 GPa、E_0= 7. 78 GPa,and the elastic parameters of the weak-moderate weathered migmatized schist of is E_S=1. 67 GPa,E_0= 0. 89 GPa. The results show that the deformation of the migmatized schist in study area is mainly due to the compress deformation of the structural fractures and the pressured bedding. The deformation range is within the specification limits,and the proposed site meets the construction conditions of concrete gravity dam,which could provide the reference for theoretical study and engineering application of rock mass deformation characteristics.
引文
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[3]张占荣,杨艳霜,赵新益等.岩体变形参数确定的经验方法研究[J].岩石力学与工程学报,2016,35(S1):3195~3202.Zhang Zhanrong,Yang Yanshuang,Zhao Xinyi et al.Empirical methods to determine the rock masses parameters[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S1):3195~3202.(in Chinese)
[4]杜磊.云母角闪片岩变形特征参数试验研究[J].甘肃水利水电技术,2016,52(9):21~23,38.Du Lei.Experimental study for parameters characteristic micahornblende schist[J].Gansu Water Resources and Hydropower Technology,2016,52(9):21~23,38.(in Chinese)
[5]凡远行,谢红强,卓莉等.基于现场承压板试验的岩体变形参数及修正方法[J].四川大学学报(工程科学版),2015,47(S2):61~66.Fan Yuanxing,Xie Hongqiang,Zhuo Li et al.Deformation parameters based on bearing plate test and its correction method[J].Journal of Sichuan University(Engineering Science Edition),2015,47(S2):61~66.(in Chinese)
[6]谢鸣凤.Boussinesq方程的适定性[J].西安文理学院学报(自然科版),2015,18(3):9~14.Xie Mingfeng.Well-posedness for the Boussinesq equations[J].Journal of Xi’an University(Natural Science Edition),2015,18(3):9~14.(in Chinese)
[7]中华人民共和国国家标准.水利水电工程地质勘查规范(GB50287-99)[S].北京:中国计划出版社,1999.The State Standards of the People’s Republic of China.Code for water resources and hydropower engineering geological investigation(GB50287-99)[S].Beijing:China Planning Press,1999.(in Chinese)
[8]刘颖,赵天宇,王发旺等.新近系红层岩体力学参数与隧道围岩分级探讨[J].工程勘察,2016,44(8):11~18.Liu Ying,Zhao Tianyu,Wang Fawang et al.Discussion on mechanical parameters and engineering classification of tunnel surrounding rock for Neogene red beds[J].Geotechnical Investigation&Surveying,2016,44(8):11~18.(in Chinese)
[9]罗传毅.确定取舍离群值的简便方法[J].吉林化工学院学报,1987,4(3):24~28.Luo Chuanyi.A Simple method for deteeting out lying observations[J].Journal of Jilin Institute of Chemical Technology,1987,4(3):24~28.(in Chinese)
[10]王毅,聂德新,张景科等.岩体裂隙化程度与岩体变形参数的关系研究[J].岩石力学与工程学报,2003,22(S2):2572~2574.Wang Yi,Nie Dexin,Zhang Jingke et al.Relation between development degree of joints and deformation parameters of rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(S2):2572~2574.(in Chinese)
[11]中华人民共和国行业标准.混凝土重力坝设计规范(DL5108-1999)[S].北京:中国电力出版社,1999.The Professional Stardards of the People’s Republic of China.Design specification for concrete gravity dams(DL 5108-1999)[S].Beijing:China Electric Power Press,1999.(in Chinese)