The Research on Test Method of Laboratory Subgrade Coefficient
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摘要: 通过对宁波轨道交通基坑开挖范围内典型软土层开展固结试验及三轴试验,得到了各层地基土的基床系数,并将试验值与规范经验值进行对比、分析后,提出了适用于宁波土层的室内试验基床系数修正公式,经修正后得到了各地基土层较为合理的标准基床系数,验证了室内试验测定地基土基床系数的有效性,解决了批量测定地基土基床系数的问题,可为工程设计和施工所使用。Abstract: Coefficients of subgrade reaction on Ningbo soft soil within the range of metro tunnels excavation were worked out through the way of consolidation tests and triaxial test,and the correction formula of laboratory subgrade coefficient that applicable to Ningbo soil was calculated out by contrasting with experimental results and normative empirical values. Then the standard subgrade coefficient of different foundation soil was got after being amended of the calculation formula, verifying the validity of test method of laboratory subgrade coefficient and solving the problems of determination of batch subgrade coefficient. It can be used for engineering design and construction.
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Key words:
- coefficient of subgrade reaction /
- consolidation test /
- riaxial test /
- modifier formula
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