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Consolidation Theory for a Stone Column Composite Foundation under Multistage Loading

机译：多阶段荷载下石柱复合地基的固结理论

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摘要

The consolidation theories considering instant load cannot fully reveal the consolidation mechanism of a stone column composite foundation used in the expressway embankments due to the time effect of loading; that is, the expressway embankments are often constructed in several stages for a long time. Meanwhile, owing to the special property that the pile-soil stress ratio is larger than 1, the consolidation theory for sand drain well foundation cannot be used directly in the consolidation analysis of stone column composite foundation. Based on the principle that the vertical load applied on the composite foundation is shared by the stone column and the surrounding soil, the governing solutions for the stone column composite foundation under a multistage load are established. By virtue of the separation of variables, the corresponding solutions of degree of consolidation for loading stage and maintaining load stage are derived separately. According to the Carrillo theorem, the solution for the average total degree of consolidation of entire composite foundation is also obtained. Finally, the reasonableness of the present solution has been verified by comparing the consolidation curve calculated by the present solution with that measured by site test.
机译：考虑荷载的时间效应，考虑瞬时荷载的固结理论不能充分揭示高速公路路堤中石柱复合地基的固结机理。也就是说，高速公路路堤往往需要长时间分几个阶段进行建设。同时，由于桩土应力比大于1的特殊性质，排砂井地基的固结理论不能直接用于石柱复合地基的固结分析。基于石柱和周围土体共同承担施加在复合地基上的竖向荷载的原理，建立了多阶段荷载下石柱复合地基的治理方案。通过变量的分离，分别得出了加载阶段和维持加载阶段的固结度的相应解。根据Carrillo定理，还可以获得整个复合地基的平均总固结度的解。最后，通过比较本溶液计算的固结曲线与现场试验测得的固结曲线，验证了本溶液的合理性。

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  • 来源
    《Mathematical Problems in Engineering》 |2016年第5期|7652382.1-7652382.8|共8页
  • 作者

    Huang Shenggen; Feng Yingtao; Liu Hao; Wu Wenbing; Mei Guoxiong;

  • 作者单位

    China Univ Geosci, Minist Educ, Engn Res Ctr Rock Soil Drilling & Excavat, Wuhan 430074, Hubei, Peoples R China;

    China Univ Geosci, Minist Educ, Engn Res Ctr Rock Soil Drilling & Excavat, Wuhan 430074, Hubei, Peoples R China;

    China Univ Geosci, Minist Educ, Engn Res Ctr Rock Soil Drilling & Excavat, Wuhan 430074, Hubei, Peoples R China;

    China Univ Geosci, Minist Educ, Engn Res Ctr Rock Soil Drilling & Excavat, Wuhan 430074, Hubei, Peoples R China|Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China;

    Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China;

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