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更新時間:2025.03.09
莫高窟壁畫加筋土地仗干縮變形研究

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世界文化遺產敦煌莫高窟以精美的壁畫聞名于世。泥質地仗中添加植物纖維有助于提高地仗強度,但對于改善干縮方面的認識不足。本文利用液體石蠟法測試草泥層地仗和麻泥層地仗的收縮曲線,探討了不同含量的加筋材料對地仗層收縮性質的影響。收縮曲線表明,當?shù)卣虒又屑尤胍环N加筋材料時,隨著加筋材料含量的增加,地仗層不再發(fā)生收縮變形并且含水率(即縮限)不斷增大,體縮率不斷減小。分析認為,加筋材料增大了土顆粒之間的摩擦阻力,部分抵消了毛細壓力,從而限制了土體的干縮變形。這意味著,古人在澄板土中加入加筋材料不僅提高了地仗的強度,而且改善了澄板土的收縮特性,解決了濕地仗的失水收縮問題。

關于莫高窟窟前殿堂與窟檐建筑的時代問題

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There are more than twenty halls in front of cave in Mogao Grottoes,such as caves No.130,108,100,98,96,95,85,76,74,72,61,55,467,53,46,45,44,39,38,35,30-27,33-21,Most of caves have its own eaves building.The two kinds of architecture are both timber construction.After carefully research,we find that these special architecture were built during early Tang dynasty at the first time,developed in Middle Tang,and very popular during the period of Gui-Yi-Jun,and still continued in the West Xia and Yuan Dynasty.In this paper,the author specially discusses the two halls in front of caves No.130 and No.96.

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