本文選題：道路工程 + 膨脹土��； 參考：《中國公路學報》2014年10期

【摘要】：以南寧外環(huán)膨脹土為對象,開展含低應力條件的不同干密度、不同初始含水率、無荷和有荷干濕循環(huán)作用重塑樣、有荷干濕循環(huán)作用原狀樣的飽和慢剪以及重塑樣飽和三軸固結排水試驗,研究干密度、初始含水率、無荷和有荷干濕循環(huán)作用等因素對其低應力條件下抗剪強度的影響。結果表明:各抗剪強度包線均呈非線性特征,可用廣義冪函數很好地擬合;低應力、干密度及初始含水率對飽和慢剪強度的影響顯著;試件初始含水率相同時,干密度越大,強度越大;干密度相同時,初始含水率越大,強度也越大;隨干濕循環(huán)次數的增加,無荷條件下土樣的抗剪強度衰減強于有荷條件。
[Abstract]:Taking the expansive soil around the outer ring of Nanning as the object, different dry density, different initial moisture content, no load and dry and wet cycle remolding samples with low stress conditions were carried out. The effects of dry density, initial moisture content, load free and dry wet cycle on the shear strength under low stress were studied by the saturated slow shear test of the undisturbed sample and the saturated triaxial consolidation and drainage test of the remolded sample under dry and wet cycles, and the effects of dry density, initial moisture content, load free and loaded dry and wet cycle on the shear strength were studied. The results show that all the shear strength envelope lines are nonlinear and can be fitted well by generalized power function. The effects of low stress, dry density and initial moisture content on saturated slow shear strength are significant, and the dry density increases with the same initial moisture content. The higher the strength is, the greater the initial moisture content is, and the greater the strength is when the dry density is the same. With the increase of dry and wet cycle times, the shear strength of soil samples under load condition is stronger than that under loading condition.
【作者單位】： 長沙理工大學交通運輸工程學院;
【基金】：國家自然科學基金項目(50978035,51108049) 交通運輸部西部交通建設科技項目(2009 353 311 060) 道路災變防治及交通安全教育部工程研究中心開放基金項目(kfi090303) 廣西交通科技項目(2011-20)
【分類號】：U412.22

【參考文獻】

相關期刊論文 前10條

1 程展林;李青云;郭熙靈;龔壁衛(wèi);;膨脹土邊坡穩(wěn)定性研究[J];長江科學院院報;2011年10期

2 崔n，

本文編號：1836373