人工合成类纤维加固黄土抗剪强度特性研究  

RESEARCH ON SHEAR STRENGTH CHARACTERISTICS OF LOESS STRENGTHENED WITH SYNTHETIC FIBERS

作　　者：曹浩 官少军 过思骞 Cao Hao;Guan Shao-jun;Guo Si-qian

机构地区：[1]中建二局第三建筑工程有限公司,北京100070

出　　处：《建筑技术开发》2025年第2期160-162,共3页Building Technology Development

摘　　要：黄土是由微单元空间骨架结构构成,黄土内含矿物碎屑成分与碳酸盐类物质,内部结构孔隙空间充满碳酸盐矿物,黄土分布竖向垂直管状孔隙,导致黄土水平向应力受力较弱。在边坡位置易产生水平向剪切破坏,因黄土内部碳酸盐矿物遇水可溶性较强,微单元空间架构受水面张力及水吸附力产生结构破坏,结合黄土基坑边坡土体为对象,通过聚丙烯纤维加固黄土与素黄土进行直接剪切强度试验,结合素黄土与聚丙烯纤维加固黄土试验数据对比,分析素土与聚丙烯纤维加固黄土抗剪强度数据曲线异同,验证聚丙烯纤维加固黄土具有抗剪强度改良效果。Loess is composed of micro-cell space skeleton structure,which contains mineral debris and carbonate substances,and the pore space of internal structure is full of carbonate minerals,and the loess is distributed in vertical and vertical tubular pores,resulting in weak horizontal stress of loess.Horizontal shear failure is easy to occur at the slope position,because carbonate minerals in loess are highly soluble in water,and the micro-cell space structure is damaged by water surface tension and water adsorption.Taking loess foundation pit slope soil as the object,the direct shear strength test of loess strengthened with polypropylene fiber and plain loess was carried out,and the comparison of experimental data between plain loess and polypropylene fiber reinforced loess was made to analyze the similarities and differences of shear strength data curves of plain loess and polypropylene fiber reinforced loess,which verified that polypropylene fiber reinforced loess had the effect of improving shear strength.

关 键 词：聚丙烯纤维 抗剪强度 纤维加固 

分 类 号：TU74[建筑科学—建筑技术科学]