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Shaking table tests on polymeric-strip reinforced-soil walls adjacent to a rock slope
Geotextiles and Geomembranes ( IF 5.2 ) Pub Date : 2020-12-29 , DOI: 10.1016/j.geotexmem.2020.12.005
Ali Komak Panah , Zakieh Eftekhari

This research adopts the approach to constructing reinforced-soil walls on rock slope, where the extent of reinforced zone has to be constrained since excavation of the relatively rigid zone may not be economical and may disrupt the traffic. To examine the seismic behavior of these structures, a series of 1-g shaking table tests using variable-amplitude harmonic excitations was conducted on 0.8m-high polymeric-strip reinforced-soil walls (PSWs) on rock slope under a scenario of waves with different intensities. Rock slope appeared to have a satisfactory dynamic response compared to the soil base as the rock behind the reinforced zone controls the development of active wedge failure and prevents higher amplification and progressive deformation. The results illustrated that the confining pressure and reinforcement length considerably affect the shear modulus and damping ratio. Also, it was found that in PSWs on rock with L/H ratio of 0.3 for bottom strips, the lowest facing panel, having the maximum horizontal displacements after failure, and lower maximum shear modulus (Gmax), and damping ratio (D), is the most crucial one despite having the highest confining pressure representing the profound effect of L/H ratio when it equals 0.3.



中文翻译:

靠近岩石边坡的聚合物条增强土墙的振动台测试

这项研究采用了在岩石边坡上建造加筋土墙的方法,由于开挖相对较硬的区域可能不经济并且可能会扰乱交通,因此必须限制加筋区的范围。为了检查这些结构的抗震性能,在有波浪的情况下,对岩石边坡上的0.8m高的聚合物条形增强土墙(PSW)进行了一系列使用变幅谐波激励的1-g振动台测试。不同的强度。与土壤基础相比,岩石坡度似乎具有令人满意的动力响应,因为在加固区后面的岩石控制了主动楔形破坏的发展,并防止了更高的放大率和渐进变形。结果表明,围压和加固长度会显着影响剪切模量和阻尼比。此外,还发现在底部带的L / H比为0.3的岩石上的PSW中,面朝下的面板最低,破坏后的水平位移最大,最大剪切模量较低(Gmax)和阻尼比(D)是最关键的一个,尽管它具有最高的围压,代表当L / H比等于0.3时所产生的深远影响。

更新日期:2020-12-29
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