Rayleigh wave propagation assessment for transport corridors
Rayleigh wave propagation assessment for transport corridors
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DOI：
10.1680/jtran.14.00036
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
D. Gunn;G. Williams;H. Kessler;S. Thorpe
中科院分区：
文献类型：
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作者：
D. Gunn;G. Williams;H. Kessler;S. Thorpe
来自高速列车的车轮载荷可以产生在近地表传播的地震“瑞利”波，从而引起轨道和地面位移。在低密度、低固结且波速较低的土壤上，这些位移可能会增加。瑞利波特性映射到土壤工程地质分类使用岩性和密度参数的有效应力为基础的算法，模型剪切波速度与深度。使用小规模的工程地质图和一维建模确定了低瑞利波速度剖面与冲积和阶地沉积物在河流流域和洪泛平原沿着在英国拟议的高速2路线。对速度-深度剖面的检查表明，当列车引起的地面运动发生在列车荷载中心引起的瑞利波频率波长的一半范围内时，场地特别容易受到动态位移放大的影响。使用th.
Wheel loading from high-speed trains can generate seismic ‘Rayleigh’ waves that propagate in the near surface, causing track and ground displacements. These displacements can increase over low-density, poorly consolidated soils with low wave velocities. Rayleigh wave characteristics were mapped onto soil engineering geological classifications using lithological and density parameters in effective stress-based algorithms that model shear wave velocities with depth. The use of small-scale engineering geological maps and one-dimensional modelling identified low Rayleigh wave velocity profiles associated with alluvial and terrace deposits in river catchments and floodplains along the proposed High Speed 2 route in the UK. Examination of the velocity−depth profiles indicated that sites are especially susceptible to dynamic displacement amplification where train-induced ground motion occurs within an interval of up to half the wavelength of the Rayleigh wave frequency induced by the train load centres. Using th...