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首页> 外文期刊>International Journal of Geosynthetics and Ground Engineering >Theoretical Solution for Consolidation Settlement of Pile-Net Composite Foundation Under Embankment Load
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Theoretical Solution for Consolidation Settlement of Pile-Net Composite Foundation Under Embankment Load

机译：路堤荷载下桩网复合地基固结沉降的理论解

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摘要

With the development of the coastal cities in China, pile-net composite foundation, which contains the components of embankment fills, reinforced cushion, geogrid and piles, has been increasingly used for highways, railways, etc. because of its effectiveness in controlling the post-construction settlement with a relatively low cost. However, the pile-net composite foundation is so complicated that few studies provide the theoretical investigation on the composite foundation. In this study, a theoretical solution was developed by fully considering the soil arching effect, membrane effect and the interactions between component parts. The finite differential method was utilized to obtain the consolidated performances of pile-net composite foundation. According to the results, it is found that (a) the stress concentration ratio and axial force of the pile increases with consolidation of composite foundation; (b) the neutral point of the pile shifts down with the consolidation process; (c) membrane effect of the geogrid also has a obvious influence on the stress concentration ratio and (d) ignoring membrane effect will underestimate the pile stress ratio. Furthermore, the theoretical solution is used to compare with the finite element modeling to illustrate its feasibility.
机译：随着中国沿海城市的发展，包含路堤填料，加筋垫层，土工格栅和桩的成分的桩-网复合地基由于其在控制立柱方面的有效性而越来越多地用于高速公路，铁路等。建设费用相对较低。然而，桩网复合地基是如此复杂，以至于很少有研究提供有关复合地基的理论研究。在这项研究中，通过充分考虑土壤拱效应，膜效应以及各组成部分之间的相互作用，提出了一种理论解决方案。利用有限差分法获得了桩网复合地基的固结性能。结果表明：（a）桩的应力集中率和轴向力随着复合地基的固结而增大； （b）桩的中性点随着固结过程而向下移动； （c）土工格栅的膜效应对应力集中比也有明显的影响，并且（d）忽略膜效应会低估桩的应力比。此外，将理论解与有限元模型进行比较以说明其可行性。

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