本文選題：土力學(xué) + 超聲波波速��； 參考：《巖石力學(xué)與工程學(xué)報》2015年07期

【摘要】：為分析凍結(jié)粉質(zhì)黏土的聲波參數(shù)與其物理力學(xué)性質(zhì)之間的關(guān)系,進(jìn)行凍結(jié)粉質(zhì)黏土的超聲波測試,同時測定了其在不同溫度下的抗拉、抗壓強(qiáng)度。基于試驗分析溫度、含水率和干密度等對凍土波速的影響以及波速與強(qiáng)度的關(guān)系。結(jié)果表明:土樣在-1℃~-7℃范圍內(nèi),波速變化尤為劇烈;存在一個臨界含水率16.03%,使波速隨含水率的增加呈先增加后減少的趨勢;在含水率相同的情況下,波速隨干密度的增加呈線性增加;通過波速計算得到凍結(jié)粉質(zhì)黏土的3個動彈性力學(xué)參數(shù),并分析這些參數(shù)隨溫度的變化趨勢;凍土聲波波速與強(qiáng)度呈現(xiàn)出良好的相關(guān)性,凍土的強(qiáng)度越大,聲波波速越高。因此,可利用聲波測試技術(shù)對凍土進(jìn)行無損檢測,為凍土強(qiáng)度的預(yù)測奠定基礎(chǔ)。
[Abstract]:In order to analyze the relationship between the acoustic wave parameters of frozen silty clay and its physical and mechanical properties, the ultrasonic testing of frozen silty clay was carried out, and the tensile and compressive strength of frozen silty clay at different temperatures was also measured. The influence of temperature, moisture content and dry density on the wave velocity of frozen soil and the relationship between wave velocity and strength are analyzed. The results show that the variation of wave velocity is especially sharp in the temperature range of 1 鈩，

本文編號：2100958