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本文介绍浅层高分辨地震反射波法在城市市政设施基础工程地质勘测中的应用实例。着重论述在城市高噪声背景条件下,取得深度为数十米的反射波所遇到的困难及采取的技术措施。用对比方法论证在资料计算机处理过程中选择合适的参数及用波动方程迭加偏移有助于提高对小断距断层的分辨。最后引用钻探险证成果证明该方法用于探查大型建筑基础埋深,了解断层和破碎带是有效的。它是开展城市物探工作的重要方法。
This paper introduces the application of shallow high resolution seismic reflection wave method in the basic engineering geological survey of municipal facilities. This paper focuses on the difficulties encountered in obtaining reflected waves with a depth of tens of meters and the technical measures taken under the background of high-noise urban environment. By contrasting the method to select the appropriate parameters in the process of computer data processing and using the wave equation to add the offset, it is helpful to improve the resolution of small fault faults. Finally, the results of the drilling reference prove that the method is used to explore the depth of the foundation of large-scale construction, and to understand the fault and broken zone is effective. It is an important method of urban geophysical work.