土钉安设位置与角度对边坡加固效果影响分析

基于朗肯土压力理论研究了土钉墙的主要设计参数对边坡安全性的影响。通过建立土钉安设位置及安设角度与边坡安全系数间的函数关系,从数学角度确定了高边坡和低边坡的界限值,分析了土钉安设位置、安设角度、边坡土黏聚力、内摩擦角4个主要因素对边坡安全性的影响,得到了高边坡情况下土钉安设位置及安设角度与边坡安全性负相关,低边坡条件下土钉安设位置及安设角度与边坡安全性正相关以及当边坡土质很差时不应采用土钉加固方案的结论。

Analysis on Influence of Installed Position and Angle of Soil Nailing on Slope Reinforcement

On the basis of Ranking’s earth pressure theory and by mathematical analysis method, the effects of main design parameters of soil nail wall on the slope safety were studied. Through the establishment of a function between the safety factor and installed position, setting angle of soil nailing, the problems of boundaries in high slope and low slope were put forward, the influence of four main factors as the soil nailing setting position and angle, slope soil cohesive force and internal friction angle on the slope safety was considered. Three main conclusions have been drawn: soil nailing installed position and angle is negatively related to the safety in the condition of high slope, soil nailing installed position and angle is positively related to the safety in the condition of low slope and soil nail reinforcement scheme should not be adopted when the slope soil property is very poor.