复合加筋路堤边坡振动台模型试验
发布时间：2018-09-18 12:30
【摘要】：废旧轮胎、三向土工格栅等新型筋材用于岩土工程加筋,经济环保且力学性能优良.采用振动台模型试验,分别对未加筋边坡、三向土工格栅边坡、废旧轮胎串与三向土工格栅复合加筋边坡、轮胎串与轮胎碎片复合加筋边坡模型在地震作用下的动力响应性能进行了研究,探讨了边坡结构在不同地震波形输入、不同加速度峰值和不同加筋方式下,未加筋边坡与复合加筋边坡的加速度分布规律.试验结果表明:加筋方式对加筋抗震效果影响比较显著,同种加筋方式的加速度响应效果在不同地震波作用下规律相近;三向格栅、三向格栅与轮胎串复合加筋、轮胎串与轮胎碎片复合加筋在汶川波激励下,其加速度放大倍数较未加筋边坡相比,最大减小幅度分别为37.5%、30.0%、21.0%,前者加速度放大倍数减小幅度分别是后两者的1.4倍和2倍;不同加筋方式下,边坡的加速度放大倍数随地震激励水平的提高呈非线性增加,但与未加筋边坡相比,随输入加速度峰值增大而呈现明显的增幅递减趋势;各种加筋土边坡与未加筋边坡加速度放大倍数均沿坡面约1/3高程处随高度增加而逐渐增大,并在靠近边坡顶部位置达到最大值.迁安波产生的加速度响应明显强于其他3种地震波的激励.
[Abstract]:The new reinforced materials, such as waste tires and three direction geogrid, are used in geotechnical engineering, which are economical and environmental friendly and have good mechanical properties. Using shaking table model test, the reinforced slope of unreinforced slope, three-direction geogrid slope, waste tire string and three-direction geogrid composite reinforced slope were studied respectively. The dynamic response performance of the composite reinforced slope model of tire string and tire debris under earthquake is studied. The slope structure under different seismic waveform input, different acceleration peak value and different reinforcement mode is discussed. Acceleration distribution of unreinforced slope and composite reinforced slope. The experimental results show that the reinforcement mode has a significant effect on the seismic effect of reinforcement, the acceleration response effect of the same reinforcement mode is similar under different seismic waves, the three direction grid, three direction grid and tire string composite reinforcement, Under Wenchuan wave excitation, the maximum decreasing amplitude of acceleration magnification of tire string and tire fragments is 37.530.010 and 21.0, respectively, and the amplitude of acceleration magnification of the former is 1.4 times and 2 times of that of the latter, respectively. Under different reinforcement modes, the acceleration magnification of slope increases non-linear with the increase of earthquake excitation level, but it decreases obviously with the increase of the peak value of input acceleration compared with the unreinforced slope. The magnification ratio of acceleration of each reinforced soil slope and unreinforced slope increases gradually with the increase of height along the slope surface about 1 / 3, and reaches the maximum near the top of the slope. The acceleration response of Qian'an wave is obviously stronger than that of the other three kinds of seismic waves.
【作者单位】： 湖北工业大学土木建筑与环境学院;清华大学水沙科学与水利水电工程国家重点实验室;
【基金】：国家自然科学基金资助项目(51678224) 湖北省教育厅重点资助项目(D20151402) 湖北省高等学校优秀中青年科技创新团队计划资助项目(T201605)
【分类号】：U416.1
[Abstract]:The new reinforced materials, such as waste tires and three direction geogrid, are used in geotechnical engineering, which are economical and environmental friendly and have good mechanical properties. Using shaking table model test, the reinforced slope of unreinforced slope, three-direction geogrid slope, waste tire string and three-direction geogrid composite reinforced slope were studied respectively. The dynamic response performance of the composite reinforced slope model of tire string and tire debris under earthquake is studied. The slope structure under different seismic waveform input, different acceleration peak value and different reinforcement mode is discussed. Acceleration distribution of unreinforced slope and composite reinforced slope. The experimental results show that the reinforcement mode has a significant effect on the seismic effect of reinforcement, the acceleration response effect of the same reinforcement mode is similar under different seismic waves, the three direction grid, three direction grid and tire string composite reinforcement, Under Wenchuan wave excitation, the maximum decreasing amplitude of acceleration magnification of tire string and tire fragments is 37.530.010 and 21.0, respectively, and the amplitude of acceleration magnification of the former is 1.4 times and 2 times of that of the latter, respectively. Under different reinforcement modes, the acceleration magnification of slope increases non-linear with the increase of earthquake excitation level, but it decreases obviously with the increase of the peak value of input acceleration compared with the unreinforced slope. The magnification ratio of acceleration of each reinforced soil slope and unreinforced slope increases gradually with the increase of height along the slope surface about 1 / 3, and reaches the maximum near the top of the slope. The acceleration response of Qian'an wave is obviously stronger than that of the other three kinds of seismic waves.
【作者单位】： 湖北工业大学土木建筑与环境学院;清华大学水沙科学与水利水电工程国家重点实验室;
【基金】：国家自然科学基金资助项目(51678224) 湖北省教育厅重点资助项目(D20151402) 湖北省高等学校优秀中青年科技创新团队计划资助项目(T201605)
【分类号】：U416.1
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