本文選題：剪切強(qiáng)度 + 高溫變溫　； 參考：《鐵道學(xué)報》2017年12期

【摘要】：選取法向應(yīng)力、養(yǎng)護(hù)初始溫度、養(yǎng)護(hù)濕度、膠結(jié)面粗糙度(JRC)等級4個影響因素,采用正交設(shè)計確定并開展25組噴射混凝土與花崗巖不規(guī)則膠結(jié)面的直剪試驗(yàn),試件養(yǎng)護(hù)采用基于高巖溫隧道噴射混凝土溫度變化規(guī)律的高溫變溫養(yǎng)護(hù)方法。結(jié)果表明:法向應(yīng)力、養(yǎng)護(hù)初始溫度、養(yǎng)護(hù)濕度、膠結(jié)面粗糙度均對噴射混凝土與花崗巖不規(guī)則膠結(jié)面的剪切強(qiáng)度影響明顯;各因素對剪切強(qiáng)度影響由強(qiáng)到弱依次為法向應(yīng)力、養(yǎng)護(hù)濕度、養(yǎng)護(hù)初始溫度、膠結(jié)面粗糙度;剪切強(qiáng)度隨法向應(yīng)力和養(yǎng)護(hù)濕度的增加而增大,隨養(yǎng)護(hù)初始溫度和膠結(jié)面粗糙度的增加先增大后減小;剪切強(qiáng)度計算公式可表示為包含法向應(yīng)力、溫度、濕度、膠結(jié)面粗糙度等級的多項式。
[Abstract]:Four factors, namely normal stress, initial curing temperature, curing humidity and roughness of cementation surface (JRC), were selected to determine and carry out direct shear tests of 25 groups of shotcrete and granite irregular cementing surfaces by orthogonal design. The high temperature variable temperature curing method based on the law of temperature variation of shotcrete in high temperature tunnel is adopted for specimen maintenance. The results show that normal stress, initial curing temperature, curing humidity and roughness of cementation surface have obvious effects on the shear strength of irregular cementation plane between shotcrete and granite, and the influence of various factors on shear strength is normal stress in turn from strong to weak. The shear strength increases with the increase of normal stress and curing humidity, and then decreases with the increase of initial curing temperature and surface roughness. The formula for calculating shear strength can be expressed as a polynomial containing normal stress, temperature, humidity and degree of roughness of cemented surface.
【作者單位】： 西南交通大學(xué)土木工程學(xué)院;西南交通大學(xué)交通隧道工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51578458) 重慶市應(yīng)用開發(fā)計劃(cstc2014yykfB30003)
【分類號】：U451.5
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本文編號：1902043