本文選題：干濕循環(huán)　切入點：單軸壓縮試驗　出處：《科學技術與工程》2017年32期

【摘要】：為了研究西安特殊黃土的強度特性,在不同含水率和不同增濕減濕作用下進行無側(cè)限抗壓強度試驗和單軸壓縮試驗,借此觀察西安特殊黃土的力學特性及強度變化規(guī)律。結(jié)果顯示:西安地區(qū)特殊黃土,無論是其單軸壓縮強度還是無側(cè)限抗壓強度均隨著含水率的降低而逐漸增大,并且呈現(xiàn)出黃土的含水率越低其強度值就越大,且強度值增加越來越快的現(xiàn)象,當黃土為干燥狀態(tài)時其強度是達到最大;無論試樣經(jīng)歷增濕減濕循環(huán)多少次,黃土的彈性模量隨著含水率的降低在持續(xù)增大,并且呈現(xiàn)出隨著含水率的降低其下降相同比例時彈性模量增大越明顯的現(xiàn)象;無論經(jīng)歷增濕減濕循環(huán)多少次,泊松比隨著含水率的降低逐漸減小,但與其他參數(shù)相比,泊松比并沒有明顯的變化。
[Abstract]:In order to study the strength characteristics of Xi'an special loess, the unconfined compressive strength test and uniaxial compression test were carried out under the action of different moisture content and different humidification and dehumidification, so as to observe the mechanical properties and the change law of strength of Xi'an special loess.The results show that the uniaxial compressive strength and the unconfined compressive strength of the special loess in Xi'an region increase with the decrease of moisture content, and the lower the moisture content of loess is, the greater the strength is.The strength value increases more and more rapidly, when loess is dry, its strength reaches the maximum, no matter how many times the sample goes through humidification and moisture reduction cycle, the elastic modulus of loess increases continuously with the decrease of moisture content.With the decrease of moisture content, the elastic modulus increases more and more obviously, no matter how many times the cycle goes through, the Poisson's ratio decreases gradually with the decrease of moisture content, but compared with other parameters, Poisson's ratio decreases gradually with the decrease of moisture content, but compared with other parameters, Poisson's ratio decreases gradually with the decrease of moisture content.Poisson's ratio has not changed significantly.
【作者單位】： 西安科技大學建筑與土木工程學院;
【基金】：國家自然科學基金(51404193) 中國博士后基金面上項目(2015M572581) 陜西省自然科學基金青年人才項目(S2015YFJQ1194)資助
【分類號】：TU444

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本文編號：1718266