土工合成材料加筋土结构的蠕变耐久性研究

Creep durability of geosynthetics reinforced soil structure

在对土工合成材料无约束条件下的蠕变规律和蠕变时的应力应变时间关系进行研究的基础上,结合加筋土结构内筋材的受力特点,建立加筋土结构内筋材蠕变伸长量和最大应变的计算方法;根据筋材蠕变对加筋土结构功能和安全性的影响,提出土工合成材料加筋土结构的蠕变耐久性评估的筋材应变控制准则和结构侧向变形控制准则,并提出相应的耐久性预测方法,最后通过实例分析验证了方法的可行性。

Based on the study of unconstrained creep law of geosynthetics, and the relationship among stress, strain and time, and considering the stress distribution characteristics of reinforcement in reinforced soil structure, the calculation method of structure deformation caused by reinforcement creep and the maximum strain of reinforcement were set up. The influence of reinforcement creep on the function and safety of structure was analyzed. The criteria of reinforcement strain and lateral deformation of reinforced soil structure for creep durability assessment and corresponding durability prediction methods of geosynthetics reinforced soil structure were proposed, and its feasibility of the method was verified.