Abstract
Behavior mode of interaction between geosynthetic material and surrounding soil is seemed in the hyperbolic curve, however, dilatancy effect takes an important role on the pull out friction that leads to have a peak before failure. There behavior of pull out resistance are defined as gradually hardening type and hard to softening type. Two formulas are explained as the general form. Correcting factor is defined as the frictional coefficient adjusted by earth pressure to reveal at 100kN/m2 of earth pressure. Two kinds of equations are presented at the base of experiment result using steal material. Characteristic of pullout force of geosynthetics tends to be classifies into the equation that is composed of internal friction angle mainly. And signification of pullout force of geosynthetics has a similar effect of with flat steal and steel rod with smoothed surface.
