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利用大型振动台试验对组合支挡结构加固边坡的地震位移松弛区进行研究,提出了位移松弛区边界线的确定方法。选取位移限定值,依次连接不同高程位置处位移曲线上位移限定值对应点,构成位移松弛区的边界线。研究结果发现,随着输入地震波强度的增大,边坡的位移松弛区范围逐渐增大;组合支挡结构作用下,边坡位移响应由表及里逐渐减弱;边坡位移时程峰值出现时间稍晚于输入地震波时程的峰值出现时间;边坡相对高度0.368至坡顶具有位移协调性,表现为位移时程峰值出现时间接近,且均早于坡脚部位。其研究成果对认识边坡的地震位移松弛区及优化组合支挡结构设计具有指导意义。
The large-scale shaking table test is used to study the seismic displacement relaxation zone of combined slope reinforcement and the method to determine the boundary line of displacement relaxation zone is proposed. Select the displacement limit value, followed by connecting different elevation position displacement curve corresponding displacement limit point, constitute the boundary zone of relaxation zone. The results show that with the increase of input seismic intensity, the range of slope relaxation displacement increases gradually. Under the action of combined support structure, the displacement response of slope gradually decreases from the surface and the inside of the slope. The peak time of slope displacement The peak appearance time of the seismic wave input was later than that of the input seismic wave. The relative height of the slope from 0.368 to the top of the slope has the coordination of displacement. The peak time of the displacement time history is close to that of the slope foot. The research results have guiding significance for understanding the seismic relaxation zone of slope and optimizing the design of combined support structures.