【摘要】：紅層填料的現(xiàn)場(chǎng)耙壓施工中的重復(fù)"壓碎-翻松"過程具有自相似特征,因此所得破碎產(chǎn)物的粒度特征可用分?jǐn)?shù)維描述.基于填料破碎的分形機(jī)理,構(gòu)造了利用室內(nèi)試驗(yàn)設(shè)備模擬現(xiàn)場(chǎng)耙壓工藝破碎填料方法,進(jìn)而研究了重復(fù)"壓碎-翻松"過程中不斷破碎的紅層填料分?jǐn)?shù)維變化規(guī)律.在此基礎(chǔ)上,制備不同分?jǐn)?shù)維填料,用于研究粒度特征對(duì)填料壓實(shí)效果和水理性質(zhì)的影響.研究結(jié)果表明,在相同的壓實(shí)參數(shù)下,填料分?jǐn)?shù)維越大越容易壓實(shí);具有相同壓實(shí)度的填料,其分?jǐn)?shù)維越大,浸水膨脹量越小,壓縮性能越低.基于填料崩解性和分形理論,分析了其中機(jī)理.成果在一定程度上揭示了粒度特征對(duì)紅層填料水理性質(zhì)影響的規(guī)律.
[Abstract]:The repeated process of "crushing and unturning" in the field raking construction of red bed fillers has self-similar characteristics, so the particle size characteristics of the broken products can be described by fractal dimension. Based on the fractal mechanism of packing crushing, a method of simulating field rake crushing process by laboratory test equipment was constructed, and the fractal dimension variation law of continuously broken red layer fillers during repeated "crushing-unturning" process was studied. On this basis, different fractal dimension fillers were prepared to study the effects of particle size characteristics on the compaction effect and hydrological properties of fillers. The results show that under the same compaction parameters, the greater the fractal dimension is, the easier the compaction is, and the larger the fractal dimension is, the smaller the water immersion expansion is and the lower the compression performance is for the fillers with the same compaction degree. Based on the theory of packing disintegrating and fractal, the mechanism is analyzed. The results reveal to a certain extent the influence of particle size characteristics on the hydrological properties of red bed fillers.
【作者單位】： 湖南大學(xué)土木工程學(xué)院;長(zhǎng)沙市軌道交通集團(tuán)有限公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51578230)~~
【分類號(hào)】：TU45

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