筋土界面参数研究综述

结合国内外筋土界面参数的最新研究进展,从试验方法、加筋材料、填料以及常用参数定义等方面进行总结,指出现行规范中筋土界面参数在加筋材料、填料及无试验资料时的合理取值等方面存在局限;通过对各种试验方法的分析,认为直剪试验和拉拔试验是研究筋土界面特性的主要手段;然后详细讨论了各种试验方法测得的参数之间的联系,尤其是直剪试验和拉拔试验获取的界面摩擦参数的关系;最后推荐加筋土结构设计时采用强度参数而放弃似摩擦系数,并建议在更加明确对加筋材料和填料要求的同时,完善现行规范对无试验资料时筋土界面参数的推荐取值。

Overview of Study on Interface Parameters between Reinforcements and Soils

The interface parameters between reinforcements and soils(IPRS) are very important to design the reinforced soil structures.Combined with the latest studies of the IPRS,the achievements in test methods,reinforcements,backfills and the common used definations of the interface parameters are summarized,the limitations of reinforcements,backfill and the reasonable value of the IPRS in applicable codes are pointed out.Based on analysing the characters of test methods,direct shear test and pullout test are provided as the main methods for the IPRS,then,the relationship of test methods results are discussed,especially the coefficients of interface friction between direct shear test and pullout test.The interface strength parameters is recommended instead of the apparent coefficient of friction in design,and it is snggested that amendment and complement to the reasonable value of IPRS of the applicable codes are needed.