莫高窟壁画加筋土地仗干缩变形研究

发布时间：2018-01-23 22:36

本文关键词： 壁画地仗加筋材料收缩　出处：《敦煌研究》2015年01期 　论文类型：期刊论文

【摘要】：世界文化遗产敦煌莫高窟以精美的壁画闻名于世。泥质地仗中添加植物纤维有助于提高地仗强度,但对于改善干缩方面的认识不足。本文利用液体石蜡法测试草泥层地仗和麻泥层地仗的收缩曲线,探讨了不同含量的加筋材料对地仗层收缩性质的影响。收缩曲线表明,当地仗层中加入一种加筋材料时,随着加筋材料含量的增加,地仗层不再发生收缩变形并且含水率(即缩限)不断增大,体缩率不断减小。分析认为,加筋材料增大了土颗粒之间的摩擦阻力,部分抵消了毛细压力,从而限制了土体的干缩变形。这意味着,古人在澄板土中加入加筋材料不仅提高了地仗的强度,而且改善了澄板土的收缩特性,解决了湿地仗的失水收缩问题。
[Abstract]:The Dunhuang Mogao Grottoes, the world's cultural heritage, are famous for their fine murals. The addition of plant fibers to the mud battles helps to enhance the intensity of the ground battles. In this paper, the shrinkage curves of grass mud layer and hemp mud layer were measured by liquid paraffin method. The effects of different contents of reinforced materials on the shrinkage properties of the ground support layer are discussed. The shrinkage curve shows that when a reinforced material is added to the local layer, the content of reinforced material increases with the increase of the content of the reinforced material. The shrinkage deformation of the ground support layer is no longer occurring and the moisture content (i.e. the shrinkage limit) is increasing and the volume shrinkage ratio is decreasing. The analysis shows that the reinforced material increases the friction resistance between the soil particles and partially offsets the capillary pressure. Therefore, the dry shrinkage deformation of soil is limited, which means that the ancient people not only increased the strength of ground warhead, but also improved the shrinkage characteristic of the soil, which solved the problem of water loss shrinkage in wetland warfare.
【作者单位】：兰州大学土木工程与力学学院;兰州大学西部灾害与环境力学教育部重点实验室;
【基金】：秦惠君与李政道中国大学生见习进修基金~~
【分类号】：K879.41
【正文快照】： 1引言敦煌莫高窟是丝绸之路上最为重要的历史文化遗址之一,位于甘肃省敦煌市,1987年被列为世界文化遗产,以精美的壁画和塑像闻名于世。莫高窟开凿断崖属酒泉系砂砾岩[1],砂砾岩石窟表面极不平整,难于绘画。古人抹制了含有加筋材料的泥质基层用来作画,称之为地仗。在我国,早在

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