土工合成材料加筋垫层承载力计算

Bearing capacities of geosynthetics reinforced cushions

土工合成材料在工程中应用日益广泛,但目前对加筋垫层的研究较少。通过理论分析和试验研究,提出了两种计算加筋垫层承载力的方法:一种为特征值法,一种为改进的太沙基公式法。在天然地基承载力计算的基础上考虑了筋材的加筋作用,同时定义了多层加筋时的筋材强度发挥系数并给出了其一般取值范围。计算结果和试验所测数据较吻合。结果表明这两种方法均可用于加筋垫层承载力的计算,从而为加筋垫层承载力的计算开辟了新的途径。

Geosynthetics have been widely used in many engineering areas.However,the research of geosynthetics reinforced cushion is rare.Based on the theoretical analysis and experiment,two methods are proposed to calculate the bearing capacities of geosynthetics reinforced cushions.One method is named characteristics value method;the other one is called modified Terzaghi method.In the above methods,the increments of bearing capacity due to the reinforcement are considerable in the bearing capacity of unreinforced cushion.A coefficient of tensile strength α is proposed and its value scope is given.The calculated results match the test data reasonably well.This comparison verified the reasonableness of the two methods,which will provide new ways to calculate the bearing capacities of geosynthetics reinforced cushions.