Laboratory Study of Geotextiles Performance on Reinforced Sandy Soil

作     者：Brahim Abdelkader Arab Ahmed Belkhatir Mostefa Shahrour Isam 

作者机构：Laboratory of Materials Sciences and Environment Civil Engineering DepartmentHassiba Ben Bouali University of ChiefChief 02000Algeria Laboratory of Civil Engineering and Geo-Environment(LGCGE)University of Lille 1Villeneuve d'Ascq 59650France 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2016年第27卷第6期

页      面：1060-1070页

核心收录：

学科分类：08[工学] 0708[理学-地球物理学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0704[理学-天文学] 

主　　题：sand triaxial geotextile drained method of preparation strength. 

摘      要：This paper presents the results of triaxial tests conducted for the investigation of the influence of geotextiles on stress-strain and volumetric change behaviour of reinforced sandy soil. Tests were carried out on loose sandy soil. The experimental program includes drained compression tests on samples reinforced with different values of both geotextiles layers （Ng） and confining pressure （σ′c）. Two methods of preparation were used： air pluviation （AP） and moist tamping （MT）. Test results show that the geotextiles induce a quasi-linear increase in the stress deviator （q） and volume contraction in the reinforced sand. Method of preparation significantly affects the shear strength; samples prepared by the air pluviation method and mobilized deviator stresses are significantly higher than those prepared by moist tamping method. Geotextiles restrict the dilation of reinforced sandy soil and consequently the contraction increases. The mobilized friction angle increases with increasing number of layers and decreases with increasing initial confining pressure. Samples prepared by moist tamping present mobilized friction angles significantly lower than those prepared by air pluviation method. For samples prepared by the air pluviation method, the secant modulus at ε1=1% and 5% decreases with increasing geotextile layers; those prepared by the moist tamping method, secant modulus at ε1=1% and 5% increases with increasing number of geotextile layer sand confining pressure. From 10% axial strain, secant modulus increases with increasing inclusions of geotextile layers.