某核电工程地基岩体变形参数取值方法研究

doi:10.13722/j.cnki.jrme.2017.1191

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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。

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	李金1
	杜建彬2
	张宜虎3
	周火明3
	庞正江3

关键词 ：岩石力学, 核电工程地基, 非线性变形特征, 试验方法, 参数取值

Abstract：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.

Key words： rock mechanics nuclear power plant bedrock ；non-linearity of deformation property test method deformation parameter determination

引用本文:

李金1，杜建彬2，张宜虎3，周火明3，庞正江3. 某核电工程地基岩体变形参数取值方法研究[J]. 岩石力学与工程学报, 2019, 38(S1): 2988-2996.
LI Jin1，DU Jianbin2，ZHANG Yihu3，ZHOU Huoming3，PANG Zhengjiang3. Study on the method for determining deformation parameters of foundation rock mass in a nuclear power project. , 2019, 38(S1): 2988-2996.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2017.1191 或 http://rockmech.whrsm.ac.cn/CN/Y2019/V38/IS1/2988

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