Reinforced earth retaining wall of green gabion by field test

In order to study the structural characteristics of green gabion reinforced earth retaining wall,a field experiment was conducted on the site of K38+398 km of Shaoxing—Zhuji Expressway in Zhejiang Province,and its vertical earth pressure,horizontal earth pressure,tensile strain distribution of geosynthetics and deformation of reinforced body were tested.The results show that in the construction process,the phenomenon of stress axis deflection appears in the basement of wall near the toe,and after construction,the horizontal earth pressure and the earth pressure along the direction of 45° in the site about 1 m away from the wall toe are larger than the vertical earth pressure,the vertical earth pressure in wall distributes in a nonlinear form,which is a single peak-shaped in the lower part of wall while bimodal-shaped in the upper part.The horizontal earth pressure on the back of wall face increases fast at first then decreases a little,it distributes along the wall height in non-linear form,the maximum occurs at 1/3H,and it is lower than the active earth pressure calculated by Rankine or Coulomb theory and lower than the tested results of traditional reinforced earth retaining wall with face pad.The tensile strain of reinforcement reaches the biggest at the side of the wall and it decreases in the direction of bars long,but at the end of reinforcement it increases a little;the lateral deformation of reinforced body is shown in bulge type,and the maximum occurs also at the site of 1/3H.