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ON DETERMINATION FOR THE COEFFICIENT OF ELASTIC UNIFORM COMPRESSION OF NATURAL SOIL
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摘要: 天然地基弹性均压系数是动力机器基础设计中最为重要的参数，根据天然地基弹性均压系数的定义，对当前确定弹性均压系数的几种方法进行了分析，指出GB 5004096《动力机器基础设计规范》和采用地基土变形模量计算成层地基的弹性均压系数的方法在理论上均是不正确的，而应采用各土层的弹性模量去确定成层地基均压系数。为了便于工程应用，给出了与GB 5004096相应地基承载力特征值对应的弹性模量值。最后，介绍了利用剪切波波速和标准贯入试验击数确定地基土弹性模量的有关资料。Abstract: The coefficient of elastic uniform compression of natural soil is the most important parameter in dynamic machine foundation design.Based on the definition for coefficient of elastic uniform compression of natural soil, several methods of defermination for this coefficient at present were analyzed.The analysis results showed that the method adopted by Design Code for Dynamic Machine Foundation(GB 5004096)and the one by deformation modulus of soil in stratified subgrade were incorrect.The coefficient should be determined by the elastic modulus of each layer soil.To conveniently applying in practice engineering, the elastic modulus value corresponding to the characteristicvalue of the relative bearing capacity of soil in GB 5004096 was presented.Finally, the achievements of determination for coefficient of elastic uniform compression by shear wave velocity or SPT blow count were introduced.
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[2] 王锡康,刘景政.地基中压力变化对弹性均压系数的影响[J].工业建筑,2010,40(12):55-59. 王锡康,刘景政.对地基弹性均压系数与基础底面积关系的研究[J].工业建筑,2008,38(1):69-73. [3] Barkan D D. Dynamics of Bases and Foundations[M]. New York: McGraw-Hill,1962. [4] CCCP. CтроителънбlеНормыиПравила.ФунламентыМащиндсДинамическимиНагрузкамиСНиПⅡ19-79[S]. [5] CCCP. CтроителънбlеНормыиПравила.ФунламентыМащиндсДинамическимиНагрузкамиСНиП.2.02.05-87[S]. [6] CCCP. CтроивнтелънбlеНормыиПравила.ФунламентыМащиндсДинамическимиНагрузкамиСНиП-Д-Б,7-70[S]. [7] GB 500072011建筑地基基础设计规范[S]. [8] GB 5004096动力机器基础设计规范[S]. [9] 天津大学,西安冶金建筑学院,哈尔滨建筑工程学院,等.地基与基础[M].北京:中国建筑工业出版社,1978. [10] 王锡康.动力机器基础振动学科的发展及需研究的若干问题[J].工业建筑,2007,37(6):83-90. [11] 今井 T.日本地表土层的 P 波和 S 波速度[G]//地基与基础译文集4.北京:中国建筑工业出版社,1980:77-81. -
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