本文選題：結(jié)構(gòu)性 + 割線(xiàn)模量　； 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年06期

【摘要】：基于側(cè)限壓縮試驗(yàn)分析不同壓力條件下原狀樣和重塑樣的割線(xiàn)模量隨含水率變化規(guī)律,獲取割線(xiàn)模量與含水率關(guān)系的表達(dá)式�；趹�(yīng)變的結(jié)構(gòu)性參數(shù)可化簡(jiǎn)為以割線(xiàn)模量為參量的結(jié)構(gòu)性參數(shù),并將割線(xiàn)模量與含水率關(guān)系式代入即可構(gòu)建含水率對(duì)結(jié)構(gòu)性參數(shù)影響的單變量模型。最后檢驗(yàn)含水率對(duì)結(jié)構(gòu)性參數(shù)影響的單變量模型。研究結(jié)果表明:不同壓力條件下原狀樣和重塑樣的割線(xiàn)模量均隨含水率增大而呈遞減趨勢(shì),但由于原狀樣存在明顯的結(jié)構(gòu)強(qiáng)度,不同壓力下原狀樣割線(xiàn)模量與含水率關(guān)系曲線(xiàn)存在交叉;采用含水率作為單變量描述的結(jié)構(gòu)性參數(shù)能夠直觀地反映土體結(jié)構(gòu)性隨含水率的變化規(guī)律;不同壓力條件下結(jié)構(gòu)性參數(shù)隨含水率的增大呈遞減趨勢(shì),但隨著壓力條件的不同,這種遞減趨勢(shì)存在差異。當(dāng)壓力較小時(shí),結(jié)構(gòu)性參數(shù)隨含水率遞減的趨勢(shì)較平緩;當(dāng)壓力較大時(shí),結(jié)構(gòu)性參數(shù)隨含水率遞減的趨勢(shì)是快速遞減;在這兩者之間則呈現(xiàn)出先平緩遞減后快速遞減的過(guò)渡狀態(tài)。
[Abstract]:The relationship between Secant modulus and moisture content was obtained by analyzing the variation of Secant modulus with water content under different pressure conditions based on the side limit compression test. The structural parameters based on strain can be simplified as structural parameters with Secant modulus as parameter, and the univariate model of the influence of moisture content on structural parameters can be constructed by inserting the relationship between Secant modulus and moisture content. Finally, the univariate model of the effect of water content on structural parameters is tested. The results show that the Secant modulus of the undisturbed and remolded samples decrease with the increase of water content under different pressure conditions, but the structural strength of the original samples is obvious. The curves of the relationship between Secant modulus and moisture content of undisturbed samples are intersected under different pressures, and the structural parameters described by using moisture content as a single variable can directly reflect the variation law of soil structure with water content. Under different pressure conditions, the structural parameters decrease with the increase of water content, but with the different pressure conditions, the decline trend is different. When the pressure is small, the trend of structural parameters decreasing with water content is relatively gentle, and when the pressure is high, the trend of structural parameters decreasing with water content is fast decreasing. Between the two, there is a transition state of gradual decline and then rapid decline.
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51178392)
【分類(lèi)號(hào)】：TU435

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