土工合成材料力学耐久性规律研究

土工合成材料耐久性,即使用寿命一直是人们选择和应用土工合成材料所考虑的首要问题。用力学性能衰减规律评价其耐久性是最可靠的方法之一。通过室内外试验,尤其是对跟踪工程实例长达14 a 的试验结果以及国内外相关试验数据的分析,提出了土工合成材料力学耐久性的理论模型,并推算出土工合成材料在有40 cm 厚以上岩土严密保护的条件下,初始强度大于500N/5cm,使用年限至少可达50 a,大多数情况可超过100 a。并得出自然环境温度与土工合成材料耐久性密切相关的结论。

Research on the durability law of geosynthetics

The durability, that is the service life of geosynthetics, is considered to be the primary problem when it will be chosen to use. The decay of mechanical performance is one of reliable indexes to evaluate the aging of geosynthetics. According to a series of tests and collected relevant test data, the theorefical model of mechanical durability of geosynthetics has been presented. The results obtained from the model show that if the initial tensile strength of geosynthetics is more than 500 N/5 cm with 40 cm thick covering soil, the service life of geosynthetics can be up to 50 years at least, and most can be over 100 years. It is concluded that the durability of geosynthetics is closely related to the natural environment temperature.