某核电工程地基岩体变形参数取值方法研究
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摘要
为研究岩体非线性变形特征对核电站地基变形参数取值的影响,以某核电工程为例,通过精细控制的室内大试块单轴压缩试验,揭示地基岩体的非线性变形特征,对比6种不同手段获得的地基岩体变形参数,表明室内岩石试验、钻孔弹模试验由于试验和取值时应力水平高于实际工程应力,所得变形参数偏高;声波波速类比法、岩体质量分级估测法获得的变形参数与以往水电工程应力水平相匹配,直接应用于核电工程也会出现偏差;现场岩体承压板变形试验、依据监测资料开展反演分析获得的地基岩体变形参数更接近真实值。针对核电工程实际情况,建议改进室内岩石试验、钻孔弹模试验方法,建立核电工程领域试验、检测、监测信息数据库,针对重要工程和条件复杂地基,加强现场承压板试验和监测工作力度,在编制核电行业试验规程时,重视对试验应力水平的限定。
In order to study the non-linear deformation features of bedrock of nuclear power project and its effect on determination of deformation parameters,the indoor uniaxial compression test of large block from a nuclear power project was done under fine control,and the nonlinearity of its deformation features were revealed. The six different methods of getting deformation parameters of bedrock were contrasted,the results revealed that the deformation parameters got by standard indoor compression test and borehole elastic modulus test will be higher because of the higher test stress level. The deformation parameters got by acoustic wave velocity analogy method or rock mass quality classification estimation method are matched with actual stress level in water-power engineering,which will occur error when directly used in nuclear power plants engineering. The in-situ plate load test and back-analyzing method based on monitoring datum are closer to the real value when getting deformation parameters of bedrock of nuclear power plants. It?s suggested that indoor compression test and borehole elastic modulus test should be improved,and the information database including in-situ test,detection and monitor should be formed in the nuclear power project. It is also necessary to refine the in-situ test and the monitoring work when facing with important project or complex foundation and attach importance to the limitation of the test stress level when drawing specifications for the nuclear power industry.
In order to study the non-linear deformation features of bedrock of nuclear power project and its effect on determination of deformation parameters,the indoor uniaxial compression test of large block from a nuclear power project was done under fine control,and the nonlinearity of its deformation features were revealed. The six different methods of getting deformation parameters of bedrock were contrasted,the results revealed that the deformation parameters got by standard indoor compression test and borehole elastic modulus test will be higher because of the higher test stress level. The deformation parameters got by acoustic wave velocity analogy method or rock mass quality classification estimation method are matched with actual stress level in water-power engineering,which will occur error when directly used in nuclear power plants engineering. The in-situ plate load test and back-analyzing method based on monitoring datum are closer to the real value when getting deformation parameters of bedrock of nuclear power plants. It?s suggested that indoor compression test and borehole elastic modulus test should be improved,and the information database including in-situ test,detection and monitor should be formed in the nuclear power project. It is also necessary to refine the in-situ test and the monitoring work when facing with important project or complex foundation and attach importance to the limitation of the test stress level when drawing specifications for the nuclear power industry.
引文
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[11]王玉玲.钻孔弹模法在某核岛岩体力学特性中的应用研究[J].工程地质学报,2013,21(1):149-157.(WANG Yuling.Boring elastic modulus method for rock mass mechanical characteristics at nuclear island[J].Journal of Engineering Geology,2013,21(1):149-157.(in Chinese))
[12]周念清,朱学愚,唐和平,等.秦山三期核电工程场地岩石力学性质与差异性沉降分析[J].岩石力学与工程学报,2002,2l(10):l 533-1 536.(ZHOU Nianqing,ZHU Xueyu,TANG Heping,et al.Analysis on property of rock mechanics and differential subsidence of foundation in stage III nuclear power engineering in Qinshan[J].Chinese Journal of Rock Mechanics and Engineering,2002,2l(10):l 533-1 536.(in Chinese))
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[14]林皋.核电工程结构抗震设计研究综述(I)[J].人民长江,2011,42(19):1-6.(LIN Gao.Review on seismic structural design of nuclear power project(I)[J].Yangtze River,2011,42(19):1-6.(in Chinese))
[15]林皋.核电工程结构抗震设计研究综述(II)[J].人民长江,2011,42(21):1-6.(LIN Gao.Review on seismic structural design of nuclear power project(II)[J].Yangtze River,2011,42(21):1-6.(in Chinese))
[16]李迪,张保军,张漫,等.岩体变形试验与分层弹模计算[M].武汉:湖北科学技术出版社,2005:84-123.(LI Di,ZHANG Baojun,ZHANG Man,et a1.Calculations on elastic modulus of each rock formation under in-situ plate bearing tests[M].Wuhan:Hubei Science and Technology Press,2005:84-123.(in Chinese))
[17]张宜虎,周火明,邬爱清,等.基于质量分级的岩体变形模量统计[J].岩石力学与工程学报,2011,30(3):486-493.(ZHANGYihu,ZHOU Huoming,WU Aiqing,et al.Statistical analyzing of rock masses deformation modulus based on classification[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):486-493.(in Chinese))
[18]中华人民共和国国家标准编写组.GB50218-94工程岩体分级标准[S].北京:中国计划出版社,1995.(The National Standards Compilation Group of People?s Republic of China.GB50218-94Standard for engineering classification of rock masses[S].Beijing:China Planning Press,1995.(in Chinese))
[19]董学晟,邬爱清,郭熙灵.三峡工程岩石力学研究50年[J].岩石力学与工程学报,2008,27(10):1 945-1 958.(DONG Xuecheng,WU Aiqing,GUO Xiling.Rock mechanics study for Three Gorges project over 50 years[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(10):1 945-1 958.(in Chinese))
[20]中国人民共和国行业标准编写组.SL264-2001水利水电工程岩石试验规程[S].北京:中国水利水电出版社,2001.(The Professional Standards Compilation Group of People?s Republic of China.SL264-2001 Specifications for rock tests in water conservancy and hydroelectric engineering[S].Beijing:China Water Power Press,2001.(in Chinese))
[21]胡人炭,何江达.钻孔岩体变形试验及应用[J].四川水力发电,2006,25(4):58-61.(HU Rentan,HE Jiangda.Borehole rock mass deformation test and its application[J].Sichuan Water Power,2006,25(4):58-61.(in Chinese))
[22]夏祥,李俊如,李海波,等.广东岭澳核电站爆破开挖岩体损伤特征研究[J].岩石力学与工程学报,2007,26(12):2 510-2 516.(XIA Xiang,LI Junru,LI Haibo,et a1.Study on damage characteristics of rock mass under blasting load in Lingao nuclear power station,Guangdong province[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2 510-2 516.(in Chinese))
[2]戴联筠.核电厂工程地质勘测与评价[J].电力勘测,2000,(1):8-15.(DAI Lianyun.Prospecting and appraisal of engineering geology for nuclear power plan[J].Electric Power Survey,2000,(1):8-15.(in Chinese))
[3]董学晟,田野,邬爱清.水工岩石力学[M].北京:中国水利水电出版社,2004:178-192.(DONG Xuecheng,TIAN Ye,WU Aiqing.Rock mechanics in hydraulic engineering[M].Beijing:China Water Power Press,2004:178-192.(in Chinese))
[4]周火明,盛谦,熊诗湖,等.复杂岩体力学参数取值研究[J].岩石力学与工程学报,2002,21(增1):2 045-2 048.(ZHOU Huoming,SHENG Qian,XIONG Shihu,et al.Study on selection of mechanical parameters for complicated rock masses[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(Supp.1):2 045-2 048.(in Chinese))
[5]MORO T.Methodology of geological and rock mechanics studies for underground nuclear plants[J].Tunneling and Underground Space Technology,1990,5(1/2):103-109.
[6]古迅.核电工程地质(一)[J].工程地质学报,1995,3(2):86-95.(GU Xun.Engineering geology in the constructing of nuclear power plant(1)[J].Journal of Engineering Geology,1995,3(2):86-95.(in Chinese))
[7]中华人民共和国国家标准编写组.GB50021-2001岩土工程勘察规范[S].北京:中国计划出版社,2009.(The National Standards Compilation Group of People?s Republic of China.GB50021-2001Code for geotechnical engineering investigation[S].Beijing:China Planning Press,2009.(in Chinese))
[8]章光,闵弘,陈静曦.某核电站核岛地基钻孔弹模试验研究[J].岩土工程界,2000,3(3):38-47.(ZHANG Guang,MIN Hong,Chen Jingxi.Borehole jack test in a nuclear island ground base[J].Geotechnical Engineering World,2000,3(3):38-47.(in Chinese))
[9]李焯芬,李光煜,章光,等.如何合理确定核岛地基动态杨氏模量[J].岩石力学与工程学报,1998,17(2):207-215.(LEE C F,LI Guangyu,ZHANG Guaug,et al.How to determine Young?s modulus of the nuclear island base[J].Chinese Journal of Rock Mechanics and Engineering,1998,17(2):207-215.(in Chinese))
[10]吴智官.福建福清核电厂厂址地基岩土工程评价[J].福建地质,2011,30(3):239-247.(WU Zhiguan.Engineering prospecting evaluation of the NPP foundation in Fuqing City,Fujian Province[J].Geology of Fujian,2011,30(3):239-247.(in Chinese))
[11]王玉玲.钻孔弹模法在某核岛岩体力学特性中的应用研究[J].工程地质学报,2013,21(1):149-157.(WANG Yuling.Boring elastic modulus method for rock mass mechanical characteristics at nuclear island[J].Journal of Engineering Geology,2013,21(1):149-157.(in Chinese))
[12]周念清,朱学愚,唐和平,等.秦山三期核电工程场地岩石力学性质与差异性沉降分析[J].岩石力学与工程学报,2002,2l(10):l 533-1 536.(ZHOU Nianqing,ZHU Xueyu,TANG Heping,et al.Analysis on property of rock mechanics and differential subsidence of foundation in stage III nuclear power engineering in Qinshan[J].Chinese Journal of Rock Mechanics and Engineering,2002,2l(10):l 533-1 536.(in Chinese))
[13]中华人民共和国国家标准编写组.GB/T50266-2013工程岩体试验方法标准[S].北京:中国计划出版社,2013.(The National Standards Compilation Group of People s Republic of China.GB/T 50266-2013 Standard for tests method of engineering rock masses[S].Beijing:China Planning Press,2013.(in Chinese))
[14]林皋.核电工程结构抗震设计研究综述(I)[J].人民长江,2011,42(19):1-6.(LIN Gao.Review on seismic structural design of nuclear power project(I)[J].Yangtze River,2011,42(19):1-6.(in Chinese))
[15]林皋.核电工程结构抗震设计研究综述(II)[J].人民长江,2011,42(21):1-6.(LIN Gao.Review on seismic structural design of nuclear power project(II)[J].Yangtze River,2011,42(21):1-6.(in Chinese))
[16]李迪,张保军,张漫,等.岩体变形试验与分层弹模计算[M].武汉:湖北科学技术出版社,2005:84-123.(LI Di,ZHANG Baojun,ZHANG Man,et a1.Calculations on elastic modulus of each rock formation under in-situ plate bearing tests[M].Wuhan:Hubei Science and Technology Press,2005:84-123.(in Chinese))
[17]张宜虎,周火明,邬爱清,等.基于质量分级的岩体变形模量统计[J].岩石力学与工程学报,2011,30(3):486-493.(ZHANGYihu,ZHOU Huoming,WU Aiqing,et al.Statistical analyzing of rock masses deformation modulus based on classification[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(3):486-493.(in Chinese))
[18]中华人民共和国国家标准编写组.GB50218-94工程岩体分级标准[S].北京:中国计划出版社,1995.(The National Standards Compilation Group of People?s Republic of China.GB50218-94Standard for engineering classification of rock masses[S].Beijing:China Planning Press,1995.(in Chinese))
[19]董学晟,邬爱清,郭熙灵.三峡工程岩石力学研究50年[J].岩石力学与工程学报,2008,27(10):1 945-1 958.(DONG Xuecheng,WU Aiqing,GUO Xiling.Rock mechanics study for Three Gorges project over 50 years[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(10):1 945-1 958.(in Chinese))
[20]中国人民共和国行业标准编写组.SL264-2001水利水电工程岩石试验规程[S].北京:中国水利水电出版社,2001.(The Professional Standards Compilation Group of People?s Republic of China.SL264-2001 Specifications for rock tests in water conservancy and hydroelectric engineering[S].Beijing:China Water Power Press,2001.(in Chinese))
[21]胡人炭,何江达.钻孔岩体变形试验及应用[J].四川水力发电,2006,25(4):58-61.(HU Rentan,HE Jiangda.Borehole rock mass deformation test and its application[J].Sichuan Water Power,2006,25(4):58-61.(in Chinese))
[22]夏祥,李俊如,李海波,等.广东岭澳核电站爆破开挖岩体损伤特征研究[J].岩石力学与工程学报,2007,26(12):2 510-2 516.(XIA Xiang,LI Junru,LI Haibo,et a1.Study on damage characteristics of rock mass under blasting load in Lingao nuclear power station,Guangdong province[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2 510-2 516.(in Chinese))