本文選題：吹填淤泥 + 有機(jī)質(zhì)�。� 參考：《中國(guó)海洋大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年10期

【摘要】：有機(jī)質(zhì)是吹填淤泥的重要組成部分,吹淤造陸工程中,有機(jī)質(zhì)對(duì)土體團(tuán)聚體的形成和穩(wěn)定所起的作用亟待研究。本研究通過室內(nèi)模擬實(shí)驗(yàn),獲取物理力學(xué)指標(biāo),定量分析有機(jī)質(zhì)對(duì)吹填淤泥工程地質(zhì)性質(zhì)的宏觀影響;同時(shí),進(jìn)行多能量同步輻射顯微CT實(shí)驗(yàn),采用數(shù)據(jù)約束模型,分析孔隙、有機(jī)質(zhì)、礦物質(zhì)1組和礦物質(zhì)2組四個(gè)組分,定量分析有機(jī)質(zhì)在固結(jié)過程中的結(jié)構(gòu)賦存及組分相關(guān)性特征。研究表明,有機(jī)質(zhì)含量與物理稠度指標(biāo)(液限、塑限和塑性指數(shù))正相關(guān)、與抗剪強(qiáng)度指標(biāo)負(fù)相關(guān);有機(jī)質(zhì)與原生礦物相互獨(dú)立賦存、與黏土礦物較為密切共存。吹填淤泥固結(jié)過程中,孔隙通道和原生礦物組成土體骨架結(jié)構(gòu),有機(jī)質(zhì)依附于黏土礦物表面,黏土礦物依附于原生礦物表面,形成逐漸穩(wěn)定的團(tuán)絮狀結(jié)構(gòu)。本研究定量分析了有機(jī)質(zhì)微宏觀特征,一定程度上突破了常規(guī)方法視場(chǎng)和分辨率的矛盾,實(shí)現(xiàn)納米分辨的各成分三維結(jié)構(gòu)。
[Abstract]:Organic matter is an important part of dredging silt. The role of organic matter in the formation and stability of soil aggregates is urgent to be studied.In this study, the physical and mechanical indexes were obtained by indoor simulation experiments, and the macroscopic effects of organic matter on the engineering geological properties of dredged silt were quantitatively analyzed. At the same time, the multi-energy synchrotron radiation microCT experiment was carried out, and the pore was analyzed by data constraint model.Organic matter, mineral group 1 and mineral group 2 were quantitatively analyzed by quantitative analysis of the structural occurrence and component correlation characteristics of organic matter during the consolidation process.The results show that the content of organic matter is positively correlated with the physical consistency index (liquid limit, plastic limit and plasticity index) and negatively correlated with the shear strength index, and the organic matter and the primary mineral exist independently and coexist closely with clay minerals.In the process of consolidation, pore channels and primary minerals form the skeleton structure of soil, organic matter is attached to the surface of clay minerals and clay minerals are attached to the surface of primary minerals, forming a gradually stable flocculating structure.In this study, the micro-macro characteristics of organic matter were quantitatively analyzed, which broke through the contradiction between the field of view and the resolution of conventional methods to a certain extent, and realized the three-dimensional structure of each component of nano-resolution.
【作者單位】： 中山大學(xué)地球科學(xué)與工程學(xué)院;澳大利亞聯(lián)邦科學(xué)與工業(yè)研究組織;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41402239,4157227,61505266) 廣東省自然科學(xué)基金項(xiàng)目(S201204000733) 國(guó)家留學(xué)基金項(xiàng)目(201506385046)資助~~
【分類號(hào)】：P642;P756.8
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本文編號(hào)：1767030