水电站坝基河床地段岩体结构评价指标获取
|
摘要
大型水电站坝基岩体评价中镶嵌结构(镶嵌碎裂结构)评价中存在着一定问题,分析处于地应力环境下紧密镶嵌结构岩体纵波速度高、完整性系数高、渗透性指标低、岩体变形模量高时,应从多指标、岩体力学参数上判别岩体质量等级,而不要仅以单一指标结构面间距小于30cm去判定其可利用性.着重介绍了河床覆盖地带结构面间距的间接分析获取方法:利用河床钻孔易于获得的岩体RQD、波速、渗透性等指标;通过建立岩体完整性系数Kv与RQD,Kv与结构面间距、渗透性指标q与岩体波速Vp之间的相关关系,从而得到河床地段岩体的结构面间距并用以评价其岩体结构类型.
The problem was introduced about rock-mass structure evaluation in dam foundation rock evaluation.In the stress station of high primary wave velocity,high integrity coefficient,low permeability index value and high rock-mass deformation modulus belonging to close mosaic structure rock-mass.The method to estimate quality index of rock mass was gotten from rock-mass mechanics parameter,not only depending on the space between discontinuities is lower than 30 cm.An indirect method was introduced that of analyzing the structure plane spacer in river-bed overlying area: the relation curve was establish between Kv and RQD,Kv and D,Lu and Vp by using of rock mass RQD and Vp and Lu coming from bore.At last,we achieve space between discontinuities in river-bed and evaluate rock-mass structure type.
The problem was introduced about rock-mass structure evaluation in dam foundation rock evaluation.In the stress station of high primary wave velocity,high integrity coefficient,low permeability index value and high rock-mass deformation modulus belonging to close mosaic structure rock-mass.The method to estimate quality index of rock mass was gotten from rock-mass mechanics parameter,not only depending on the space between discontinuities is lower than 30 cm.An indirect method was introduced that of analyzing the structure plane spacer in river-bed overlying area: the relation curve was establish between Kv and RQD,Kv and D,Lu and Vp by using of rock mass RQD and Vp and Lu coming from bore.At last,we achieve space between discontinuities in river-bed and evaluate rock-mass structure type.
引文
[1]谷德振.水文地质工程地质问题[M].北京:科学出版社,1965.Gu D Z.The problemofhydrogeology and engineering geology[M].Beijing:China science Press,1965..
[2]谷德振.谷德振文集[C].北京:地震出版社,1994.Gu DZ.GUDe-zhen corpus[C].Beijing:China Earthquake Press.1994.
[3]中华人民共和国行业标准编写组.水力发电工程地质勘察规范(GB50287-2006)[S].北京:中国计划出版社,2008.The Professional Standards Compilation Group of People's Republic of China.Code for hydropower engineering geological investigation(GB50287-2006)[S].Beijing:China Planning Press.2008.
[4]周洪福,韦玉婷,聂德新.对碎裂结构岩体似连续介质特征的一点研究[J].工程地质学报,2008,16(1):17-21.Zhou H F,Wei Y T,Nie D X.Some likely continuous medium featuresof cataclastic rockmass[J].Journal of Engineering Geology,2008,16(1):17-21.
[5]崔银祥.碎裂岩体用作高混凝土重力坝坝基的可能性评价[D].成都:成都理工大学,2005.Cui Y X.Probability evaluation of cataclastic rock mass used for highconcrete damfoundation[D].Chengdu:Chengdu UniversityofTechnology,2005.
[6]张春芳,许模,李虎,等.柱状节理玄武岩岩体结构与结构面的分形研究[J].四川地质学报.2009(3):292-295.Zhang C F,Xu M,Li H,et al.A study of structure and structural planefractal of basalt rockmasswithcolumnarjoints[J].ActaGeologicaSichuan.2009(3):292-295
[7]周洪福.深覆盖宽河床多种复杂岩体作为重力坝建基岩体研究[D].成都:成都理工大学,2008.Zhou H F.Research for multi-complicated rock mass as gravity damfoundation located in the wide river-bed with deep overburden layer[D].Chengdu:Chengdu University of Technology,2008.
[8]柴波,殷坤龙,陈丽霞,等.岩体结构控制下的斜坡变形特征[J].岩土力学,2009(2):87-93.Chai B,Yin K L,Chen L Xe,t al.Analysis of slope deformation undercontrol of rock mass structure[J].Rock and Soil Mechanics,2009(2):87-93.
[9]张敏,黄润秋,史新鹏.小湾水电工程坝前2#山梁高边坡稳定性评价[J].湖南科技大学学报(自然科学版),2009(1):53-57.Zhang M,Huang R Q,Shi X P.Study on stability of 2#high rock slope infront of the dam in Xiaowan hydropower project by using 3D numericalsimulation[J].Journal of Hunan University of Science&Technology(Natural Science Edition),2009(1):53-57.
[10]张慧梅.板裂介质岩体边坡的后屈曲性态[J].湖南科技大学学报(自然科学版),2007(4):73-76.Zhang H M.Post-buckling behavior of rock mass slope with sheet crack[J].Journal of Hunan University of Science&Technology(NaturalScience Edition),2007(4):73-76.
[2]谷德振.谷德振文集[C].北京:地震出版社,1994.Gu DZ.GUDe-zhen corpus[C].Beijing:China Earthquake Press.1994.
[3]中华人民共和国行业标准编写组.水力发电工程地质勘察规范(GB50287-2006)[S].北京:中国计划出版社,2008.The Professional Standards Compilation Group of People's Republic of China.Code for hydropower engineering geological investigation(GB50287-2006)[S].Beijing:China Planning Press.2008.
[4]周洪福,韦玉婷,聂德新.对碎裂结构岩体似连续介质特征的一点研究[J].工程地质学报,2008,16(1):17-21.Zhou H F,Wei Y T,Nie D X.Some likely continuous medium featuresof cataclastic rockmass[J].Journal of Engineering Geology,2008,16(1):17-21.
[5]崔银祥.碎裂岩体用作高混凝土重力坝坝基的可能性评价[D].成都:成都理工大学,2005.Cui Y X.Probability evaluation of cataclastic rock mass used for highconcrete damfoundation[D].Chengdu:Chengdu UniversityofTechnology,2005.
[6]张春芳,许模,李虎,等.柱状节理玄武岩岩体结构与结构面的分形研究[J].四川地质学报.2009(3):292-295.Zhang C F,Xu M,Li H,et al.A study of structure and structural planefractal of basalt rockmasswithcolumnarjoints[J].ActaGeologicaSichuan.2009(3):292-295
[7]周洪福.深覆盖宽河床多种复杂岩体作为重力坝建基岩体研究[D].成都:成都理工大学,2008.Zhou H F.Research for multi-complicated rock mass as gravity damfoundation located in the wide river-bed with deep overburden layer[D].Chengdu:Chengdu University of Technology,2008.
[8]柴波,殷坤龙,陈丽霞,等.岩体结构控制下的斜坡变形特征[J].岩土力学,2009(2):87-93.Chai B,Yin K L,Chen L Xe,t al.Analysis of slope deformation undercontrol of rock mass structure[J].Rock and Soil Mechanics,2009(2):87-93.
[9]张敏,黄润秋,史新鹏.小湾水电工程坝前2#山梁高边坡稳定性评价[J].湖南科技大学学报(自然科学版),2009(1):53-57.Zhang M,Huang R Q,Shi X P.Study on stability of 2#high rock slope infront of the dam in Xiaowan hydropower project by using 3D numericalsimulation[J].Journal of Hunan University of Science&Technology(Natural Science Edition),2009(1):53-57.
[10]张慧梅.板裂介质岩体边坡的后屈曲性态[J].湖南科技大学学报(自然科学版),2007(4):73-76.Zhang H M.Post-buckling behavior of rock mass slope with sheet crack[J].Journal of Hunan University of Science&Technology(NaturalScience Edition),2007(4):73-76.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心