【摘要】 设计并完成了大型绿色加筋格宾挡墙模型试验。试验模型尺寸为3.0 m×0.85 m×2.0 m(长×宽×高),坡角为70°,填料采用工程现场用红砂岩材料制备。双绞合六边形金属格宾网由PVC包裹,并镀锌防腐,网面单元尺寸为80 mm×100 mm。通过输入不同幅值和频率的正弦波激励,探讨重复荷载作用下模型挡墙的动力特性与动力响应规律。试验结果表明:绿色加筋格宾结构具有良好的稳定性和抗破坏性,其结构寿命能满足使用要求。当振动频率达到8 Hz时,绿色加筋格宾挡墙的竖向、水平加速度和竖向、水平位移反应变化极大。加速度反应、动位移反应和动应力反应沿墙深度方向都以一定的速度衰减。试验结果有助于揭示挡墙在重复荷载作用下的失稳机制,为绿色加筋格宾挡土墙工程设计提供有益的参考。更多还原

【Abstract】 A large-scale model test of green reinforced gabion walls was introduced.The model wall filled with red sandstone was built with a length of 3.0 m,height of 2.0 m,width of 0.85 m and a slope angle of 70°.PVC-coated heavy galvanized of double twisted hexagonal wire mesh was used in the test,and the wire mesh specimens were 80 mm×100 mm cell sizes.A series of tests were performed with different input sine wave frequency and amplitudes.The dynamic characteristics and dynamic responses of model wall under cyclic loading were discussed.Results show that green reinforced gabion structure has a good stability and anti-destructive and its structure life meets the use requirements.When the vibration frequency reaches 8 Hz,there are greatly changes of vertical & horizontal acceleration and displacement response of the green reinforced gabion wall.There is a certain degree of speed decline to acceleration response,dynamic displacement response and dynamic stress response of wall depth directions.The results are helpful to reveal the mechanism of reinforced gabion walls instability under cyclic loading,and provide valuable references of green reinforced gabion walls engineering design.更多还原