本文關(guān)鍵詞：濱海氯鹽漬土溶陷及鹽脹特性　出處：《長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年04期 　論文類型：期刊論文

  更多相關(guān)文章： 道路工程 氯鹽漬土 凍融循環(huán) 上覆荷載 溶陷 鹽脹

【摘要】：為了深入研究濱海氯鹽漬土的溶陷和鹽脹特性,在不同初始含水量、含鹽量及上覆荷載條件下,進(jìn)行了室內(nèi)溶陷試驗(yàn)研究,完成了4次降溫-升溫循環(huán)下的鹽脹試驗(yàn),得到了不同含鹽量試樣的凍融循環(huán)鹽脹規(guī)律,并通過改變荷載條件,對(duì)比分析了無荷和有荷情況下的鹽脹規(guī)律。研究結(jié)果表明:影響氯鹽漬土溶陷性質(zhì)的主要因素是初始含水量和含鹽量,初始含水量較小時(shí),土樣溶陷的敏感度更強(qiáng),其溶陷系數(shù)較大;隨著含鹽量增大,不同荷載條件下的溶陷系數(shù)均表現(xiàn)為拋物線趨勢(shì),當(dāng)含鹽量為10%時(shí),溶陷系數(shù)曲線出現(xiàn)明顯的峰值;5℃~-10℃的降溫區(qū)間是鹽脹量迅速增大期;凍融循環(huán)條件下,鹽漬土出現(xiàn)殘余鹽脹量,并表現(xiàn)鹽脹累加性,累加性隨著凍融循環(huán)次數(shù)的增多而減弱;上覆荷載對(duì)鹽脹有明顯的抑制作用,荷載作用使起脹溫度大大提高,說明荷載對(duì)鹽脹的發(fā)展有延緩作用。
[Abstract]:In order to study the dissolution and salt dilatation characteristics of littoral chlorinated saline soil indoor solution test was carried out under the conditions of different initial water content salt content and overlying load. The salt heaving test under four temperature-temperature cycles has been completed, and the salt heaving laws of different salt content samples have been obtained, and the loading conditions have been changed. The results show that the main factors affecting the solution properties of chlorinated saline soil are initial water content and salt content, and the initial water content is small. The sensitivity of soil sample is stronger and the coefficient of dissolution is larger. With the increase of salt content, the dissolution coefficient shows parabola trend under different loading conditions. When the salt content is 10, the dissolution coefficient curve has obvious peak value. The cooling range of 5 鈩，

本文編號(hào)：1416563