真空预压加固软土地基沉降的简化计算方法

作者：艾英钵 施建勇 刘加才

单位：河海大学岩土工程研究所 河海大学岩土工程研究所 南京工业大学土木工程学院 江苏南京210098 江苏南京210098 江苏南京210009

关键词：真空预压  沉降  堆载  固结

分类号：TU472.33

出版年,卷(期):页码：2005,29(6):3-5

摘要：

指出了将抽真空直接作为荷载进行沉降计算方法的不足,提出通过有限元分析,根据最终沉降量及固结过程相当两大原则,将抽真空等效为堆载的方法。并由此提出了真空预压沉降计算简化方法。通过对工程算例的分析,演示了本文计算方法,也验证了该方法的合理性。

The shortcomings in the method for calculation of soil settlement with vacuum being directly used as the load are revealed in paper.A method making the vacuum equivalent to the surcharge load on the basis of the two principles of equivalent final settlement and equivalent consolidation process is proposed by means of finite element analysis and a simplified method to calculate the settlement of soft soil improved with the vacuum preloading method is therefore derived.With an analysis of cases of engineering calculations,the method proposed in the paper is demonstrated and the rationality of the proposed method is verified.

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参考文献：

[1]M oham edelhassan E,Shang J Q.V acuum and surchargecom b ined one-d im ensiona l conso lidation of clay so ils[J].C anad ian G eotechn ica l Journa l,2002,39(5):1 126-1 138. [2]刘加才,施建勇,赵维炳.真空堆载联合预压作用下路基固结分析[J].水运工程,2003,(6):1-4,9.

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