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空沟是一种常用的连续隔振屏障,可以有效地降低人工振动。以位移为变量的二维格子法在波动问题计算中具有良好的适应性、高效性,兼备有限元与差分法的一些优点,应用该法针对层状地基中作用于路堤上的交通荷载引起振动的空沟竖向隔振问题进行了参数研究,分别考虑了上软下硬地基和上硬下软地基两种情况。研究结果表明:空沟宽度对隔振效果的影响较小;空沟深度与空沟的位置是影响隔振效果的关键因素,它们相互关联,其取值应综合考虑;在上述两类层状地基中,若空沟深度与上层土的厚度接近或相等均对竖向隔振不利;路堤高度越大对竖向隔振效果越不利。
Gutter is a commonly used continuous barrier that effectively reduces manual vibration. The two-dimensional grid method with displacement as a variable has good adaptability and high efficiency in the calculation of wave problems, and has some advantages of finite element method and finite difference method. This method is applied to the vibration caused by traffic loads acting on the embankment in layered soil The vertical vibration isolation of open gully is studied. The two cases of upper soft ground and the lower soft ground are considered respectively. The results show that: the width of the hollow groove has little effect on the vibration isolation effect; the depth of the hollow groove and the position of the empty groove are the key factors that affect the vibration isolation effect. They are interrelated and their values should be considered comprehensively. In the foundation, if the depth of the gully is close to or equal to the thickness of the upper soil, it will be unfavorable to the vertical vibration isolation; the more the height of the embankment is, the less favorable the vertical vibration isolation effect will be.