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首页> 外文期刊>Journal of geophysics and engineering >Integrated geophysical survey in defining subsidence features on a golf course
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Integrated geophysical survey in defining subsidence features on a golf course

机译：集成地球物理勘测，确定高尔夫球场的沉降特征

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Subsidence was observed at several places on the Salina Municipal Golf Course in areas known to be built over a landfill in Salina, Kansas. High-resolution magnetic survey (～5400 m~2), multi-channel electrical resistivity profiling (three 154 m lines) and microgravity profiling (23 gravity-station values) were performed on a subsidence site (Green 16) to aid in determining boundaries and density deficiency of the landfill in the vicinity of the subsidence. Horizontal boundaries of the landfill were confidently defined by both magnetic anomalies and the pseudo-vertical gradient of total field magnetic anomalies. Furthermore, the pseudo-vertical gradient of magnetic anomalies presented a unique anomaly at Green 16, which provided a criterion for predicting other spots with subsidence potential using the same gradient property. Results of multi-channel electrical resistivity profiling (ERP) suggested the bottom limit of the landfill at Green 16 was around 21 m below the ground surface based on the vertical gradient of electric resistivity and a priori information on the depth of the landfill. ERP results also outlined several possible landfill bodies based on their low resistivity values. Microgravity results suggested a -0.14 g cm~(-3) density deficiency at Green 16 that could equate to future surface subsidence of as much as 1.5 m due to gradual compaction.
机译：在堪萨斯州萨利纳（Salina）的一个垃圾填埋场上建的萨利纳市政高尔夫球场的多个地方都观察到了沉降。在沉降点（绿色16）上进行了高分辨率磁测量（〜5400 m〜2），多通道电阻率剖面（3条154 m线）和微重力剖面（23个重力站值），以帮助确定边界和沉降附近垃圾填埋场的密度不足。填埋场的水平边界由磁异常和总磁场磁异常的准垂直梯度确定。此外，磁异常的准垂直梯度在格林16处表现出独特的异常，这为使用相同的梯度特性预测具有沉陷潜力的其他斑点提供了标准。多通道电阻率分布图（ERP）的结果表明，基于电阻率的垂直梯度和有关垃圾场深度的先验信息，Green 16填埋场的底部极限在地面以下约21 m。 ERP结果还根据其低电阻率值概述了几种可能的垃圾填埋场。微重力结果表明，在Green 16处密度密度为-0.14 g cm（-3），这可能由于逐渐压实而相当于未来地面沉降达1.5 m。

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