Study On The Performance Of Double-Sided Reinforced Soil Retaining Wall Under Static Load

Reinforced soil retaining walls have been widely used in various aspects such as slope protection and roadbed treatment due to their superior performance.In some cases,reinforced soil retaining walls need to be designed and constructed under special conditions.Double-sided reinforced soil retaining walls have complex geometric structures.Currently,there is little research on the structural characteristics of double-sided reinforced soil retaining walls both domestically and internationally.Therefore,further research is needed on the working performance of double-sided reinforced soil retaining walls.Due to the differences in the length and arrangement of reinforcement materials on both sides,as well as the difference in the aspect ratio of the filled soil,it has a significant impact on the stress state of the double-sided reinforced soil retaining wall.The aspect ratio of the fill between two opposite walls,the length of the reinforcement material,and the arrangement of the reinforcement are key parameters used to analyze its performance.In order to study the influence of the ratio of width to height,reinforcement length and reinforcement arrangement method of double reinforced earth retaining wall on its internal and external stability under static load,the finite difference method is proposed in this paper.With the double reinforced earth retaining wall as the research object,the bearing capacity of the retaining wall,the lateral displacement of the wall surface,the tensile stress of reinforcement materials The influence law of anti slip safety factor and potential failure surface.The main conclusions obtained are as follows:(1)Under the action of vertical load,increasing the length of reinforcement material can improve the bearing capacity of the retaining wall and improve the anti slip safety factor.However,at the same time,the tensile stress of the reinforcement material also increases.The lateral displacement of the panel varies with the width to height ratio of the fill.Therefore,the longer the reinforcement length,the higher the bearing capacity but not the most economical.(2)When the width to height ratio of the fill is W=1.4H-3H,under the action of self weight stress,as the spacing between the two reinforced areas decreases,the soil pressure towards the back of the reinforced area,the lateral displacement of the retaining wall panel,and the peak tensile stress of the reinforcement material decrease,and the safety coefficient increases from slight to significant changes.(3)When the distance between the two reinforced areas of a double-sided reinforced soil retaining wall is too far,the potential failure surface behind the wall does not intersect,and the reinforced bodies on both sides operate independently.When two reinforced areas are close together,the potential failure surface behind the wall intersects,and the interaction between the two reinforced areas will change the position and shape of the critical failure surface.(4)In reinforcement arrangement method 2(with unequal height arrangement of reinforcement on both sides),under the action of vertical load,the ultimate bearing capacity and anti slip safety coefficient of the double-sided reinforced soil retaining wall increase with the increase of the staggered length L_R,and the lateral displacement of the wall decreases.The peak tensile stress of the top and bottom reinforcement materials does not change much,while the peak tensile stress of the middle reinforcement material significantly decreases.(5)Under the action of vertical load,the settlement of the loading plate,lateral displacement of the wall,and tensile stress of the geogrid in the staggered length L_Rof 0.3H in the reinforcement arrangement method 2(with unequal height arrangement of reinforcement on both sides)are smaller than those in the reinforcement arrangement method1(with equal height arrangement of reinforcement on both sides).Therefore,using reinforcement arrangement 2 and staggered length L_Rof 0.3H is more economical than using reinforcement arrangement 1.By studying the performance of double-sided reinforced soil retaining walls,more valuable rules can be derived to maximize their effectiveness in the most economical form,which has guiding significance for engineering practice.