纤维加筋黄土力学特性及土水特征试验研究  

Experimental Study on the Mechanical Deformation Characteristics and Soil Water Characteristics of Waste Fiber Reinforced Loess

作　　者：褚峰 吴云超 张宏刚 陈挺 Chu Feng;Wu Yunchao;Zhang Honggang;Chen Ting(College of Urban Planning and Municipal Engineering,Xi'an Polytechnic University,Xi'an 710048,P.R.China;China Coal Engineering Ecological Environment Technology Co.,Ltd.,Beijing 100013,P.R.China)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710048 [2]中煤科工生态环境科技有限公司,北京100013

出　　处：《地下空间与工程学报》2025年第2期472-480,共9页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(52178355);陕西省自然科学基础研究计划资助项目(2020JM-572);西安市碑林区科技计划资助项目(GX2148)。

摘　　要：将废旧维纶纤维及涤纶纤维分别按一定比例掺加到黄土中,形成纤维加筋黄土,利用非饱和土固结仪对不同含水量条件下维纶纤维加筋黄土、涤纶纤维加筋黄土及素黄土在竖向荷载作用下的变形量及吸力进行量测,系统分析了纤维加筋黄土的屈服特性及在竖向荷载作用下的土水特征。结果表明:(1)纤维加筋黄土及素黄土的屈服应力随着含水量的增大而减小,同一含水量条件下,维纶纤维加筋黄土的屈服应力大于涤纶纤维加筋黄土的屈服应力;(2)纤维加筋黄土的初始吸力大于素黄土的初始吸力,同一含水量条件下,维纶纤维加筋黄土的初始吸力大于涤纶纤维加筋黄土的初始吸力;(3)在竖向荷载作用下,素黄土吸力随着竖向荷载的增大而逐渐减小,维纶纤维加筋黄土吸力随着竖向荷载的增大呈先增大后平缓稳定的变化趋势,涤纶纤维加筋黄土吸力随着竖向荷载的增大呈先平缓稳定后逐渐减小的变化趋势;(4)纤维加筋黄土的吸力临界荷载随着含水量的增大而逐渐减小。Waste vinylon fiber and polyester fiber were added to loess in a certain proportion to form fiber reinforced loess.The deformation and suction of vinylon fiber reinforced loess,polyester fiber reinforced loess and plain loess under vertical load are measured with unsaturated soil consolidation meter under different water content.The yield characteristics of fiber reinforced loess and soil water characteristics under vertical load were systematically analyzed.The test results show that the yield stress of fiber reinforced loess and plain loess decreases with the increase of water content.Under the same water content,the yield stress of the Loess reinforced with vinylon fiber is greater than that of the Loess reinforced with polyester fiber.The initial suction of fiber reinforced loess is larger than that of plain loess.Under the same water content,the initial suction of the Loess reinforced with vinylon fiber is larger than that of the Loess reinforced with polyester fiber.Under the action of vertical load,the suction of plain loess gradually decreases with the increase of vertical load.With the increase of the vertical load,the suction of the Loess reinforced with vinylon fiber increases first and then becomes stable.With the increase of the vertical load,the suction of polyester fiber reinforced loess shows a trend of gentle stability at first and then gradually decreasing.The suction critical load of fiber reinforced loess decreases with the increase of water content.

关 键 词：黄土 维纶纤维 涤纶纤维 加筋土 屈服应力 土水特征 

分 类 号：TU411[建筑科学—岩土工程]