潍坊北部堆载预压下吹填土固结分析与模拟

发布时间：2018-04-01 20:24

本文选题：模型箱　切入点：自然沉降　出处：《人民长江》2016年S1期

【摘要】：堆载预压是一种成本低、效果明显、应用广泛的处理吹填土的方法。针对胶东潍纺北部围海造陆工程,以模型箱试验为基础比较了自然沉降和堆载预压情况下吹填土固结效果。试验表明,通过堆载预压方法可以缩短固结时间、降低土含水率、提高土抗剪强度。模型箱试验中土达到稳定即24 h内沉降量小于0.01 mm时,堆载预压模型用时缩短了26.7%,含水率降低13.2%,100 kPa下土抗剪强度增加了近10%。为与试验分析对比,进一步用FLAC软件建立模型,模拟分析堆载预加处理后吹填土沉降规律,分析表明数值结果与试验结论相吻合,证明了数值方法的适用性。
[Abstract]:Based on the model box test, the consolidation effect of filling soil under the condition of natural settlement and surcharge preloading is compared.The experimental results show that the consolidation time can be shortened, the soil moisture content can be reduced and the shear strength of the soil can be improved by surcharge preloading.In the model box test, when the settlement of soil is less than 0.01mm within 24 hours, the time of surcharge preloading model is reduced by 26.7mm, and the shear strength of the soil is increased by about 10.0 when the moisture content is reduced by 13.2 kPa.In order to compare with the experimental analysis, the model was established by FLAC software, and the settlement law of the backfill was simulated and analyzed. The results show that the numerical results are in agreement with the experimental results, and the applicability of the numerical method is proved.
【作者单位】：吉林大学建设工程学院;
【基金】：国家高技术研究发展“863”计划资助项目(2012AA052803) 中国地质调查局项目“山东半岛蓝色经济区地质环境调查评价”(1212011220001)
【分类号】：P75;TU411

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