锦屏一级左岸垫座以下坝基地质缺陷初步评价

刘明; 黄润秋; 严明; 林锋; 霍俊杰

锦屏一级左岸垫座以下坝基地质缺陷初步评价

成都理工大学地质灾害防治与地质环境保护国家重点实验室成都 610059

基金项目:

雅砻江水电开发联合研究基金重点项目(50539050)

详细信息

作者简介:
刘明,地质工程专业.Email: 89478698@qq.com

中图分类号: TV221.2
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出版历程
- 收稿日期: 2010-03-27
- 修回日期: 2010-06-05
- 刊出日期: 2010-12-25

PRELIMINARY EVALUATION OF GEOLOGICAL DEFECTS FOR ROCK FOUNDATION BELOW LEFT BANK PEDESTAL OF ARC DAM FOR JINPING Ⅰ POWER-STATION

State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection,Chengdu University of Technology,Chengdu 610059

摘要

摘要: 锦屏一级左岸垫座以下发育的不良地质单元,不仅破坏其岩体的完整性,而且可能导致建基面抗变形能力的不均匀性,以致对坝基岩体带来不良影响,危及拱坝安全。立足于坝基岩体质量环境,将垫座以下不良地质体划分为内倾顺层构造带,陡倾切层构造带,溶蚀裂隙带等三大综合缺陷类型,并阐述了各类缺陷的性状及其对坝基完整性、均匀性、变形性等方面的控制作用,分析了其典型声波曲线的波速量值及衰减特征。由此,按轻度、中等、强烈三个等级,定性的分区评价了各部位缺陷对坝基岩体的影响程度。着重认为f2断层附近,规模较大、间距较小、波速值低(2500-3500m s-1)的内倾顺层构造带,不仅控制着岩体的抗剪性能,而且对坝基变形分异和基地应力分布存在强烈影响,应对其进行单独处理。
- 地质缺陷 /
- 锦屏一级 /
- 建基面 /
- 岩体质量
Abstract: The adverse geologic elements within the dam foundation below left pedestal of the jinping I project cause not only the disruption of rock mass in integrity,but also the nonhomogeneous deformation of foundation interface,which can endanger the safety of the arc dam. Based upon their environments of rock masses qualities,the geologic defects are classified into three major classes: the anaclinal and bed-paralleled structural zone,the steep dipping and cross-bedding structural zone and the Karst fracture zone.Furthermore,the control action of the various geologic defects on the dam foundation in integrity,homogeneity,and deformation is discussed.The wave velocity and attenuation characteristic of their typical speed curves of sonic wave are also analyzed.Thereby,the qualitative evaluation of the influence degree of geologic defect to rock masses in dam foundation is made by zoning in order ofslightly,moderatelyandhighlyrates.And the conclusions emphasize that the anaclinal and bed-paralleled structural zones are large scale,and have small spacing and low wave velocity value(2500～3500m s-1) near the fault f2. The zones not only control over the shearing properties of rock masses,but also have a highly-degree influence on the differential deformation and the stress distribution of the dam foundation,which should be deal with separately.
- Geologic defect /
- Jinping I Project /
- Foundation interface /
- Rock masses quality

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参考文献(1)

[1] 顾冲时, 伍元,赖道平,等.地质缺陷对坝体结构影响分析模型研究
[J].岩土工程学报, 2009, 13 (6): 886～891.
Gu Chongshi,Wu Yuan,Lai Daoping,et al.Analytic model for effect of geologic defects on dams.Chinese Journal of Geotechnical Engineering, 2009, 13 (6): 886～891.

[2] 赖道平. 地质缺陷对混凝土坝结构性态演变和转移的影响研究 .南京: 河海大学, 2005.
Lai Daoping.The influence of geologic defects on the evolution and variation of concrete dams.Nanjing: Hohai University, 2005.

[3] 许文年. 地质缺陷对坝基及滑坡稳定性影响的研究
[M].北京:中国水利水电出版社, 2000.
Xu Wennian.The effect of geologic defects on dam foundation and landslide stability.Beijing:China WaterPower Press, 2000.

[4] 顾冲时, 赖道平,吴中如,等.地质缺陷体变形综合模量时变模型研究
[J].岩石力学与工程学报, 2005, 24 (17): 3088～3093.
Gu Chongshi,Lai Daoping,Wu Zhongru,et al.Time series evolution model for deformation modulus of geological defect.Chinese Journal of Rock Mechanics and Engineering, 2005, 24 (17): 3088～3093.

[5] 蔡元奇, 朱以文,李金光,等.地质缺陷对拱坝及坝基力学行为的影响
[J].岩石力学与工程学报, 2002, 21 (12): 1805～1809.
Cai Yuanqi,Zhu Yiwen,Li Jinguang,et al.Influence of geological flaw on mechanical behaviors of arch dam and dam foundation.Chinese Journal of Rock Mechanics and Engineering, 2002, 21 (12): 1805～1809.

[6] 罗熙康; 刘华. 江垭大坝基础开挖及地质缺陷处理质量控制
[J].人民长江, 2001, 32 (02): 8～10.
Luo Xikang,Liu Hua.Quality control of foundation excavation and geological defect treatment for Jiangya dam.Yangtze River, 2001, 32 (02): 8～10.

[7] 陈永川, 王雪波,季福全.岩溶地质缺陷分析与处理措施
[J].人民长江, 2008, 39 (4): 22～24.
Chen Yongchuan,Wang Xuebo,Ji Fuquan.Analysis of geological defect and treatment measure for Yinpan hydropower station.Yangtze River, 2008, 39 (4): 22～24.

[8] 黄海峰. 高压固结灌浆在坝肩地质缺陷处理中的应用
[J].水力发电, 2009, 35 (9): 73～74, 80.
Huang Haifeng.Application of high pressure consolidation grouting in the geological defect treatment of dam abutment.Water Power, 2009, 35 (9): 73～74, 80.

[9] 何建明, 智立新,孙磊.构皮滩水电站左坝肩地质缺陷深层处理
[J].人民长江, 2008, 39 (9): 26～28.
He Jianming,Zhi Lixin,Sun Nei.Treatment for deep geological default at left abutment of Goupitan hydropower station.Yangtze River, 2008, 39 (9): 26～28.

[10] 张文杰, 周创兵,荣冠.锦屏一级水电站左坝肩边坡岩体质量CSMR分类
[J].岩土力学, 2005, 26 (增): 95～98.
Zhang Wenjie,Zhou Chuangbing,Rong Guan.Application of the CSMR system to slope stability evaluation for Jinping First Cascade Hydropower Station.Rock and Soil Mechanics, 2005, 26 (Supp): 95～98.

[11] 中华人民共和国水利行业标准编写组. 水利水电工程施工地质勘察规程(SL 313-2004)
[S].北京:中国水利水电出版社, 2005.
Professional Standards Compilation Group of the Peoples Republic of China.Geological Code of Construction Period for Water Resources and Hydropower Project(Sl 313-2004)
[S].Beijing: China WaterPower Press, 2005.

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