本文選題：模型箱　切入點(diǎn)：自然沉降　出處：《人民長(zhǎng)江》2016年S1期

【摘要】：堆載預(yù)壓是一種成本低、效果明顯、應(yīng)用廣泛的處理吹填土的方法。針對(duì)膠東濰紡北部圍海造陸工程,以模型箱試驗(yàn)為基礎(chǔ)比較了自然沉降和堆載預(yù)壓情況下吹填土固結(jié)效果。試驗(yàn)表明,通過(guò)堆載預(yù)壓方法可以縮短固結(jié)時(shí)間、降低土含水率、提高土抗剪強(qiáng)度。模型箱試驗(yàn)中土達(dá)到穩(wěn)定即24 h內(nèi)沉降量小于0.01 mm時(shí),堆載預(yù)壓模型用時(shí)縮短了26.7%,含水率降低13.2%,100 kPa下土抗剪強(qiáng)度增加了近10%。為與試驗(yàn)分析對(duì)比,進(jìn)一步用FLAC軟件建立模型,模擬分析堆載預(yù)加處理后吹填土沉降規(guī)律,分析表明數(shù)值結(jié)果與試驗(yàn)結(jié)論相吻合,證明了數(shù)值方法的適用性。
[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.
【作者單位】： 吉林大學(xué)建設(shè)工程學(xué)院;
【基金】：國(guó)家高技術(shù)研究發(fā)展“863”計(jì)劃資助項(xiàng)目(2012AA052803) 中國(guó)地質(zhì)調(diào)查局項(xiàng)目“山東半島藍(lán)色經(jīng)濟(jì)區(qū)地質(zhì)環(huán)境調(diào)查評(píng)價(jià)”(1212011220001)
【分類(lèi)號(hào)】：P75;TU411

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本文編號(hào)：1697166