本文選題：巖石力學(xué)　切入點(diǎn)：砂巖　出處：《巖石力學(xué)與工程學(xué)報(bào)》2017年S2期

【摘要】：巖石的熱導(dǎo)率是開展巖土工程的關(guān)鍵參數(shù)之一,其除了受到巖石孔隙特性等巖石本身特性影響外,還與溫度等巖石所處環(huán)境密切相關(guān)。針對溫度和含水率對巖石導(dǎo)熱特性的影響,通過自主設(shè)計(jì)的溫濕耦合導(dǎo)熱特性實(shí)驗(yàn)系統(tǒng),開展不同溫度和含水率下砂巖導(dǎo)熱特性實(shí)驗(yàn)研究。研究結(jié)果表明:首先,在-80℃~90℃溫度區(qū)間內(nèi)砂巖的導(dǎo)熱系數(shù)與溫度呈反比關(guān)系,變化幅度隨巖性不同,其中粗砂巖最大,細(xì)砂巖次之,粉砂巖最小;其次,在相同溫度下砂巖的導(dǎo)熱系數(shù)隨含水率增加而增大,且其增長速率隨溫度的升高而降低;最后,飽和狀態(tài)下砂巖導(dǎo)熱系數(shù)隨溫度升高而下降,且在0℃附近有顯著的跳躍,通過理論模型分析揭示巖石孔隙水相變是跳躍的主要因素。
[Abstract]:The thermal conductivity of rock is one of the key parameters in geotechnical engineering. It is not only affected by the rock characteristics such as pore characteristics of rock, but also closely related to the environment of rock such as temperature.In view of the influence of temperature and moisture content on the thermal conductivity of rock, the thermal conductivity of sandstone under different temperature and water content is studied by the self-designed experimental system of thermal-moisture coupled thermal conductivity.The results show that: firstly, the thermal conductivity of sandstone is inversely proportional to the temperature in the temperature range of -80 鈩，

本文編號：1715043