【摘要】 采用一维剪切波理论分析了广州洲头咀隧道场地土水平地震波作用下的响应.计算结果表明:①洲头咀隧道场地土在不同超越概率的基岩加速度作用下的地震响应放大系数基本相同;②土表加速度响应谱的卓越周期比基岩加速度的卓越周期稍有左移,但幅度很小;③不同钻孔土体对于同一基岩加速度的地震响应放大系数差异较大,因此对于土层构造变化较大的场地,应适当增加钻孔密度.更多还原

【Abstract】 Seismic responses of site soil in Guangzhou Zhoutouzui immersed tunnel are calculated based on one-dimension shear wave theory.The results show that: ①the amplifying factors of seismic response of site soil in Guangzhou Zhoutouzui immersed tunnel are almost the same under the excitation from bed rock accelerations with different exceeding probability;②the predominant period of the ground acceleration response spectrum is a little smaller than that of the bed rock acceleration response spectrum,however the amplitude is very small;③the amplifying factors of seismic response of the same bed rock acceleration are very different to the site soil with different drilling hole ratios,therefore,it is necessary to keep increasing the drilling hole ratio for the site soil with complex soil-layer structure.更多还原