细砂中钢带-填土废塑料瓶抗拔性能试验研究

研究利用填土废塑料瓶作为横向构件附在加筋土挡墙（MSEWs）中钢带上可行性。配筋中的横向构件对增加抗拔力有重要影响。该加筋系统是由作为纵向构件的钢带和作为横向构件的填土废塑料瓶组成。为更好地研究以填土废塑料瓶作为横向构件对抗拔性能的影响，对一条独立的钢带和分别带有1～7个瓶子的钢带进行了拉拔试验。在不同的法向应力下进行了超过18次的实验室大型拉拔试验（例如拉拔箱尺寸为长1.2 m、宽0.6 m、高1.0 m）来评估新提出的加固元件的性能。试验结果表明，在扁钢带上建立三维空间对提高抗拔阻力影响很大。提高抗拔阻力最有效的方法是在距离S与直径D之比为3的钢带上加入4个横向构件，其平均抗拔阻力约为单独钢带的5倍。有横向构件和无横向构件钢带的极限抗拔阻力随竖向应力的增大而增大。

Laboratory investigation on the effect of waste plastic bottles filled with soil as transverse members on pullout resistance of steel strip for reinforcement fine sand

The aim of this study is to investigate the feasibility of utilizing the waste plastic bottles filled with soil as the transverse element attached to the steel stripe in the Mechanically Stabilized Earth Walls (MSEWs). Transverse members of reinforcement have a major effect on increasing the pullout resistance. This system is comprised of a steel stripe as a longitudinal member and waste plastic bottles filled with soil as transverse members attached to it. To understand this, pullout tests were conducted on one steel strip and seven steel stripes with one to seven bottles. More than 18 laboratory large-scale pullout tests (i.e. length1.20 m, width 0.6 m, and height 1 m) under different normal stresses were conducted to evaluate the performance of the newly suggested reinforcement element. The results showed that creating a third dimension on a flat steel strip has a great effect on increasing the pullout resistance, the most efficient adding four transverse members to the steel strip with the ratio of distance to diameter (S/D) equal to 3, that the pullout resistance was to average about 5 times greater than the steel strip alone. The ultimate pullout resistance for steel strips with transverse members and without transverse members increased by increased vertical stress.