纯化水库深水高坝静动力应力变形研究
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摘要
本文根据对纯化水库进行的现场勘察、室内土工试验、室内资料处理、计算、分析获得了坝基以下各土层的分布规律及物理、力学性质指标，进而确定静、动应力变形分析的典型断面。根据静、动三轴仪对坝体和坝基土料进行的静、动力三轴试验，研究了土料静、动应力变形特性，测定了对坝体进行静、动力应力变形分析所需的参数。采用非线性静、动力有限元分析程序对围坝的4个典型剖面进行了静、动力仿真模拟，模拟计算了坝体自填筑至蓄水运行和发生7°地震各阶段坝体及坝基的变形以及应力分布，地震应力响应和地震引起的超静振动孔隙水压力分布以及永久变形。判断了坝体和坝基中出现裂缝、塑性区以及地震液化的可能性。根据大坝原型观测系统观测的各种数据，对研究的结果和得出的数据进行了检验，为黄河三角洲软土地区兴建“深水高坝”提供了理论和实践的支持。
Based on in-situ investigation, indoors soil tests, data process and calculation analysis for CHUNHUA reservoir , this article acquires the distributing regulation and physical & mechanical properties for each layer soil below the dam base, and further determines typical model cross sections for static & dynamic stress deformation analysis. By the static & dynamic triaxial tests on the soil derived from dam and dam base, the article makes research on the soil static & dynamic deformation properties and measured the parameters needed by stress deformation analysis. Non linear static & dynamic finite element procedure is adopted for the true emulation of the four typical geologic profiles of the dam, and imitates to compute the each stage deformation and stress distribution from the dam fill to full water run and during the 7 degree seismic intensity, the article also imitates to compute the response to earthquake force , the excess vibration pore water pressure distribution and permanent deformation, predicting the occurrence possibility of the crac^ plastic zone and earthquake liquefaction. According to all kinds of data obtained from prototype observations system, this article examined the research results and data, it provides the theoretical and practical support for the construction of deep water and high dam in YELLOW RIVER delta soft land area.
Based on in-situ investigation, indoors soil tests, data process and calculation analysis for CHUNHUA reservoir , this article acquires the distributing regulation and physical & mechanical properties for each layer soil below the dam base, and further determines typical model cross sections for static & dynamic stress deformation analysis. By the static & dynamic triaxial tests on the soil derived from dam and dam base, the article makes research on the soil static & dynamic deformation properties and measured the parameters needed by stress deformation analysis. Non linear static & dynamic finite element procedure is adopted for the true emulation of the four typical geologic profiles of the dam, and imitates to compute the each stage deformation and stress distribution from the dam fill to full water run and during the 7 degree seismic intensity, the article also imitates to compute the response to earthquake force , the excess vibration pore water pressure distribution and permanent deformation, predicting the occurrence possibility of the crac^ plastic zone and earthquake liquefaction. According to all kinds of data obtained from prototype observations system, this article examined the research results and data, it provides the theoretical and practical support for the construction of deep water and high dam in YELLOW RIVER delta soft land area.
引文
[1] Clough R.W. and Wood R.J. (1967), Analysis of embankment stresses and deformations, J. SM & FD, ASCE, Vol. 93, SM4.
[2] 沈珠江，考虑剪胀性的土和石料的非线性应力应变模式，水利水运科学研究，1986年，第4期。
[3] 沈珠江，一个计算砂土液化变形的等价粘弹性模式，第四届土力学及基础工程学说会议论文集，建筑工业出版社，1986年
[4] Duncan J. M. and Chang C. Y. , Nonlinear analysis of stress and strain in soils, J. Soil Mechanics and Foundation Division, ASCE, Vol. 96, SMS, 1970.
[5] Duncan J. M. et al., Strength, stress-strain and bulk modulus parameters for finite element analysis of stress and movement in soil masses, Report No. UCB/GT/80-01, Uni. Of California, Berkeley, 1980.
[6] 林在贯，高大钊等，岩土工程勘察手册，中国建筑工业出版社，第一版，1994
[7] 吴世明，周景星，土的动力特性及其测试和应用，同济大学出版社，1990
[8] 张克绪，谢君斐，土动力学，地震出版社，1989
[9] 李国英等，纯化水库深水高坝新技术研究，南京水利科学研究院出版，1998
[2] 沈珠江，考虑剪胀性的土和石料的非线性应力应变模式，水利水运科学研究，1986年，第4期。
[3] 沈珠江，一个计算砂土液化变形的等价粘弹性模式，第四届土力学及基础工程学说会议论文集，建筑工业出版社，1986年
[4] Duncan J. M. and Chang C. Y. , Nonlinear analysis of stress and strain in soils, J. Soil Mechanics and Foundation Division, ASCE, Vol. 96, SMS, 1970.
[5] Duncan J. M. et al., Strength, stress-strain and bulk modulus parameters for finite element analysis of stress and movement in soil masses, Report No. UCB/GT/80-01, Uni. Of California, Berkeley, 1980.
[6] 林在贯，高大钊等，岩土工程勘察手册，中国建筑工业出版社，第一版，1994
[7] 吴世明，周景星，土的动力特性及其测试和应用，同济大学出版社，1990
[8] 张克绪，谢君斐，土动力学，地震出版社，1989
[9] 李国英等，纯化水库深水高坝新技术研究，南京水利科学研究院出版，1998
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