利用瑞雷波法评价既有铁路路基

根据瑞雷波频散相速度能够反演地层的剪切波速度结构 ,瑞雷波的特性使得瑞雷波法具有良好的场地适应性 ,在望京至和平里的既有铁路路基探测中 ,结合反射波法的CDP技术和瑞雷波谱分析技术 ,获得了 2 -D剪切波速度剖面 ,根据剪切波速度与轻型动力触探击数的一致性 ,从而能够在垂直和水平两个方向上对铁路路基进行评价

USING RAYLEIGH-WAVE METHOD TO EVALUATE EXISTING RAILROAD FOUNDATION

Using R-wave dispersion phase velocity we can reverse S-wave velocity group of geologic strata. The R-wave method has effective applicability for engineering site because of its characteristics. In detection of the existing foundation Wangjing～Hepingli Railroad, combining the CDP method of multi-trace reflection technology and R-wave spectral analysis technique, we obtain 2-D S-wave velocity profile. According to the coherence between S-wave velocitiy and the value of light dynamic penetration test, we can evaluate the railroad foundation in vertical and horizontal direction.