【摘要】：對不同含水量的原狀離石黃土進行了單軸和常規(guī)三軸壓縮試驗,研究了原狀離石黃土的結構強度隨含水量和圍壓的變化規(guī)律。試驗表明,單軸壓縮條件下離石黃土的結構強度隨含水量的增加呈對數(shù)函數(shù)減少;常規(guī)三軸壓縮條件下離石黃土的結構強度受含水量和圍壓的影響顯著。運用Mohr-Coulomb理論對原狀離石黃土的強度參數(shù)(C,鐖)與含水量的變化規(guī)律進行了研究,內(nèi)聚力C隨含水量的增加呈指數(shù)函數(shù)規(guī)律下降,摩擦系數(shù)tan鐖隨含水量的增加呈線性函數(shù)規(guī)律下降,期望該研究成果能為黃土地區(qū)的工程設計提供參考。
[Abstract]:Uniaxial and conventional triaxial compression tests were carried out to study the variation of structural strength with water content and confining pressure of undisturbed Lishi loess with different moisture content. The experimental results show that the structural strength of Lishi loess decreases with the increase of water content in uniaxial compression condition, and the structural strength of Lishi loess under conventional triaxial compression condition is significantly affected by water content and confining pressure. The change of strength parameters (C, P) and water content of undisturbed Lishi loess is studied by using Mohr-Coulomb theory. The cohesion C decreases with the increase of water content in exponential function. The coefficient of friction (tan) decreases linearly with the increase of water content. It is expected that the research results can be used as a reference for engineering design in loess area.
【作者單位】： 西安科技大學地質與環(huán)境學院;商洛市地質環(huán)境監(jiān)測中心站;長安大學地質工程與測繪學院;
【基金】：國家自然科學基金(41572287,41702298)
【分類號】：TU444

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