Seismic Response of Soil Slopes in Shaking Table Tests: Effect of Type and Quantity of Reinforcement

Abstract

To study the effect of reinforcement type and quantity on the response of model slopes in this study, a series of shaking table tests were carried out on model slopes reinforced with different quantities of geotextile and geogrid. Model slopes were constructed to an angle of 45°using poorly graded sand. Acceleration of base shaking and shaking frequency were varied in different tests. The response of model soil slopes is compared in terms of the acceleration amplifications and horizontal displacements of the slope measured at different elevations. Results from these model tests revealed that the acceleration amplifications were slightly lesser in case of geogrid reinforced slopes because of higher interfacial friction of cohesionless soil with the geogrid. Acceleration amplifications were not affected by varying the quantity of reinforcement. However, horizontal displacements reduced drastically with the inclusion of reinforcement. Though the difference was not substantial, geotextile reinforced slopes were more effective in reducing the deformations compared to geogrid reinforced slopes. With the increase in the quantity of reinforcement, deformations decreased linearly, until reinforcement saturation occurred, beyond which the rate of decrease of deformations was less.

Seismic response of micropiles-reinforced landslide based on shaking table test

“…This indicates that the landslide presents obvious amplification effect on input seismic waves. Moreover, the PGA amplification factor increases along the height of landslide, and it reaches a maximum at the top of the landslide, which is similar to the observations in other slopes studied by previous researchers (Meunier et al 2008;Fan et al 2016;Srilatha et al 2016).…”

Shaking table tests on gravel slopes reinforced by concrete canvas

“…Those researchers also discussed the influence of the reinforcement material arrangement on the model response. However, compared with reinforced walls, studies on the dynamic responses of reinforced slopes with gentle slopes are relatively limited, particularly studies on gravel slopes (Lin et al, 2015;Edinç liler and Toksoy 2016;Srilatha et al, 2016;Xu and Yang 2019;Wang et al, 2019). Meanwhile, for reinforced slopes, most studies have focused on the reinforcing effect of geotextile.…”

“…They found that the displacement increased proportionately with the seismic frequency, whereas frequency had little effect on the acceleration amplifications. Furthermore, Srilatha et al (2016) investigated the effects of different reinforcement materials (geotextiles and geogrids) on the response of a model slope. Their results showed that a geotextile-reinforced slope better reduced lateral deformation compared to a geogrid-reinforced slope, and that varying the reinforcement quantity had no effect on the acceleration amplification.…”

Seismic Response of Rock Slopes with the Anchor Cable in Centrifuge Modeling Tests

“…Many scholars believe that it is necessary to reinforce the slope mentioned above. eory and experiments have been developing very quickly for the reinforced slope under dynamical response [17][18][19][20][21]. For an unstable slope with the potential sliding surface (structural surface), prestressed anchor cable is usually adopted.…”