软弱土地基在地震作用下正反两方面的效应
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摘要
通过对１９７６年唐山大地震资料的分析研究表明，在强震作用下地基中的软粘土层与可液化饱和松砂层都有明显的防止多层砖房倒塌的作用以及减少震害的作用（相对于良好的Ⅱ类土地基而言）。虽然软粘土层的震陷、饱和松砂土层的液化都会引起一定的震害，但运用抗震设计和纠斜技术能够克服这方面的震害。
The analysis of the materials of Tangshan Earthquake in 1976 indicutes that the soft clay strata and liquescent saturated loose sandstrate have the clear effects of preventing the storied brick house from collapsing and reducing the earthquake damage, under the strong shock action (compared with goodd classification foundation).Of course,the earthquake depression in the soft clay strata and the liquefaction of the saturateel loose sand strata will all cause a certain earthquake damage,but it is not difficult to overcome the earthquake damage by applying the earthquake proof design and the technique of inclination correction.
The analysis of the materials of Tangshan Earthquake in 1976 indicutes that the soft clay strata and liquescent saturated loose sandstrate have the clear effects of preventing the storied brick house from collapsing and reducing the earthquake damage, under the strong shock action (compared with goodd classification foundation).Of course,the earthquake depression in the soft clay strata and the liquefaction of the saturateel loose sand strata will all cause a certain earthquake damage,but it is not difficult to overcome the earthquake damage by applying the earthquake proof design and the technique of inclination correction.
引文
1陈国兴，谢君斐，张克绪．天然地基浅基础的震害分析．岩土工程学报，1995，17（1）2刘恢先主编．唐山大地震震害（第二册）．北京：地震出版社，19863杨健，万志清．覆盖土层对地震剪切波的放大与吸收作用．岩土工程学报，1995，17（1）
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