条带式带倾齿加筋的界面特性及拉拔机理

Behavior of Interface and Pullout Mechanism of Slant-Denti-Strip Reinforcements

对低超载下的条带式带倾齿加筋进行大量的拉拔试验,研究拉拔力随齿筋倾角、齿筋高度、齿筋间距的变化特性.在拉拔试验的基础上,推测条带式带倾齿加筋极限拉拔阻力的组成:水平筋上下表面与土体界面摩擦阻力、齿筋的端面摩擦阻力(齿筋端面力的水平分量)、齿筋的侧阻力(拉拔方向前后两侧面压力差的水平分量)、水平筋与齿筋的左右两侧面与土体的摩擦阻力.运用极限平衡理论分析条带式带倾齿加筋砂土的界面作用机理,建立条带式带倾齿加筋极限拉拔力模型.

Many pullout tests with slant-denti-strip geosynthetics were implemented under low surcharge in order to find the influence of various factors such as slant angles, height, and horizontal space of vertical reinforcing element on the ultimate pullout resistances. Based on the pullout tests, the component elements of ultimate pullout resistances were predicted. These include friction forces between the upper and lower surfaces of horizontal reinforcement and soil, vertical reinforcement point friction force （horizontal component of point resistance） , vertical reinforcement shaft resistance （horizontal component of the deviation pressure of foreside pressure from backside pressure ） , and friction forces between both sides of horizontal and vertical reinforcement and soil. The interaction mechanism between sand and slant- denti-strip inclusions is analyzed using the proposed to determine the pullout resistance.