土工织物抗拔试验分析研究

Studies For Pull-out Test of Geotextile

本文首先从土粒的微观结构入手,分析了填土中埋入土工织物后,土工织物抗拔力的形成机理。进而通过土工织物的拉拔试验,分析了决定抗拔力的拟摩擦系数f~*的主要影响因素。得出f~*随正应力δ增大而减小,抗拔力T与土工织物拉应变ε的关系可用T=k(ε—ε_o)^+b来拟合等几点有意义的结论。

In this paper, the mierostructure of soil grain was considered at first. The forming mechanism of pullout resistance of geotextile was analysed after geotextilc was buried in earth-fill. In order to determine the coefficient of guasi-friction f~* of pullout resistance, the main affecting factors were analyed, depending on the pull-out test of geotextile. And some conclusions were obtained: the f~* decreased with normal stress increasing, the relationship between pullout resistance T and tensile strain ε of geotextile can be described by the following equation: T=k(ε-ε_o)3+b. etc.