付垚,张宇丰,张振超,孙计同,杨彬

• 1:济南市勘察测绘研究院
• 2:中国海洋大学环境科学与工程学院
• 3:山东省海洋环境地质工程重点实验室

摘要(Abstract)：

平原水库库底沉积层中的砂体会对水库运行以及穿过库底地下空间工程建设的安全造成不可忽视的影响，一种快速且准确识别库底砂体空间位置的探测手段可为破解以上问题提供技术支持。本文以位于黄河流域的济南鹊山水库为研究区，基于数值模拟与原位探测结果，分析评价了走航式电阻率法识别平原水库库底砂体的最优装置参数和能力，并将所得结论在原位探测中应用、验证。研究结果表明，选用通用走航探测航速(航速2.5 m/s)对平原水库(水深6 m)进行探测时，走航式电阻率法对埋深浅(埋深<30 m)、厚度大(厚度>6 m)的砂体有较好的理论分辨能力。对于薄层深埋砂体(厚度<2 m,埋深>10 m)则难以识别；砂体探测顶、底界位置与实际顶、底界位置间的偏移距离与砂体顶界埋深、砂体长度呈正相关关系。砂体厚度增大会提高不同顶界埋深条件下砂体界面偏移距离差异，偏移距离正相关于深埋砂体厚度，负相关于浅埋砂体厚度；建立了修正原位探测结果并识别砂体的方法。基于原位探测结果所识别的砂体形态并不精确，其厚度普遍厚于实际砂体厚度约0～3 m。厚度小于3 m的薄砂体则难以被该方法识别。

关键词(KeyWords)： 走航式电阻率法;数值模拟;平原水库;水下砂体;探测效果

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项(201962005)资助~~

作者(Author): 付垚,张宇丰,张振超,孙计同,杨彬

DOI: 10.16441/j.cnki.hdxb.20230209

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