网状及条带式加筋土挡墙加筋应变的测试

Testing of pulling strains of both striped and netted reinforcement wall

通过对网状及条带式加筋土挡墙大型模型试验加筋拉应变的测试分析,发现条带式与网状加筋的拉应变自墙背沿加筋长度逐渐减小;在离墙面相同距离处,条带式加筋的拉应变比筋网中筋肋的拉应变大得多;各层加筋的应力水平均随超载的增大而提高,随着超载的增大,条带式加筋前、中部的拉应力增长幅度很大,其后部拉应力增幅较小;而筋网的总体应力水平均有比较均匀的提高,提高的幅度自前部向后端逐渐减小,这说明网状加筋比条带式加筋更适合于修筑加筋土挡墙。

By analyzing the pulling strains of both striped and netted reinforcement wall,it is found that the pulling strains are both decreasing gradually with the position from wall back to its end. At the same distance, the pulling strains of the striped one are greater than that of the netted one. With the surcharge load increasing, the stress level of every layer reinforcement becomes higher and the increasing extent of the pulling stress in the front-mid part of striped reinforcement is very higher, and it is smaller in the behind part of that. The total stress level in netted reinforcement increases uniformly, and increasing extent becomes gradually smaller and smaller.These results show that the netted reinforcement is more suitable for building reinforced wall than the striped one.