考虑通水量影响的塑料排水板加固深度的理论研究

发布时间：2018-05-24 11:18

本文选题：地基基础 + 地基处理　；参考：《岩石力学与工程学报》2016年S1期

【摘要】：针对新近吹填土淤泥地基处理中加固深度小,土体强度增强有限等问题,提出理论分析加固深度的新思路,即以传统的负压下砂井固结方程的解析解为基础,通过迭代法计算出土体中任意一点的固结度,换算出土体的加固深度,从而分析研究塑料排水板的通水量变化对加固深度的影响,得出加固深度的变化规律。结果表明:在真空预压处理新近吹填土淤泥地基时,排水板的通水量对地基的加固深度有显著的影响;在一定的固结时间(90 d)内,排水板之间的土体会形成5~10 m的硬壳层,通过延长加固时间可以增加硬壳层的厚度;当通水量减小超过60%时,延长固结时间对改善加固深度作用不大。因此,设计和施工中应充分考虑排水板的通水量影响。
[Abstract]:In view of the problems of small reinforcement depth and limited strength of soil in the treatment of newly dredged soil silt foundation, a new idea for theoretical analysis of reinforcement depth is proposed, which is based on the analytical solution of the consolidation equation of the sand well under the traditional negative pressure. The consolidation degree of any point in the soil is calculated by iterative method, and the reinforcement depth of the soil is converted. The influence of the change of the amount of water on the reinforcement depth of the plastic drainage plate is studied and the change law of the reinforcement depth is obtained. The results show that the water volume of the drainage plate has a significant influence on the reinforcement depth of the foundation in the vacuum preloading treatment of the newly filled silt foundation; the soil between the sewerage plates will form a 5~ within a fixed time of consolidation (90 d). The hard shell layer of 10 m can increase the thickness of the hard shell layer by prolonging the strengthening time. When the water flow is reduced by more than 60%, the prolongation of the consolidation time has little effect on the improvement of the strengthening depth. Therefore, the effect of the water volume of the drainage plate should be fully considered in the design and construction.
【作者单位】：华南理工大学交通与土木学院;广东交通职业技术学院;
【分类号】：TU472.33

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