黄河河道整治工程根石声波场特征和厚度估算  

The Acoustic Wave Field Features and Thickness Estimation of the Footstone of the Yellow River Engineering

作　　者：李广超[1,2] 朱培民[1] 郭玉松[2] 蒋锦朋 杨克思 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074 [2]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《人民黄河》2015年第5期45-48,共4页Yellow River

基　　金：水利部科技推广计划项目(TG1117)

摘　　要：探测根石走失情况是黄河防汛工作的重要组成部分。采用浅地层剖面仪探测根石大大提高了工作效率和探测精度,但坡比计算结果偏小,且根石的厚度及最大冲刷深度无法确定。根据实例,采用叠后偏移处理的办法解决了坡度估计偏小的问题;同时,根据根石的声波波场特征划分根石顶、底反射波,并依据根石的声波响应频率、波速等得出根石厚度的计算方法,相应解决了最大冲刷深度估算问题。To detect the missing amount of the footstone is an important part of the Yellow River flood control work. Detection of footstone greatly improves the work efficiency and detection precision by the sub -bottom profiler, but the slope ratio calculation result is smaller than that of the reality and the footstone thickness and the maximum scour depth cannot be determined. According to the instance and using the post - stack time migration technology, it had solved the problem of estimation of smaller slope than that of the actual. Meanwhile, according to the acoustic wave field characteristics of footstones, we could discriminate the top and bottom reflection of the footstones and calculate the thickness of footstones by using the travel time differences between top and bottom reflections with priori velocity for solving the problem of the maximum scour depth.

关 键 词：根石 浅地层剖面 声波 厚度估算 黄河 

分 类 号：TV871.4[水利工程—水利水电工程] TV882.1