土工格栅加筋风积沙的三轴试验研究

本文以广泛分布于内蒙古沙漠地区的风积沙为研究对象，对不加筋风积沙和不同层数的加筋风积沙做了一系列的固结排水常规三轴试验，通过分析试验数据来探讨其强度变化规律和体积变化规律。试验结果表明：在风积沙中以一定平铺的方式加入土工格栅可以使土体获得准黏聚力和增大其内摩擦角，从而提高其抗剪强度；在一定范围内。加筋层数越多，强度提高越大。这一研究为沙漠地区的土建、水利等工程中的加筋土体结构的设计和理论研究提供参考。

EXPERIMENTS ON TRIAXIAL COMPRESSION APPLIED TO GEOGRID-REINFORCED AEOLIAN SAND

Aeolian sand is extensively distributed across the desert area in Inner Mongolia. In this study, unreinforced aeolian sand and aeolian sand with different numbers of reinforced layers are submitted to a series of consolidated-drain normal-triaxial-compression tests. Experimental data are analyzed so as to inquire into the regularity of the strength and volume variation. Test results show that the reinforcement could improve the cohesion and enlarge the angle of internal friction of the aeolian sand ,and the strength grows along with the increase of the number of reinforced layers. This study gives a basis for the design and theoretical research of reinforced soil structure applicable to civil engineering projects in the desert area.