Study of application of complex signal analysis to predicting karst-fractured ground water with GPR
Study of application of complex signal analysis to predicting karst-fractured ground water with GPR
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复信号分析在探地雷达预测岩溶裂隙地下水中的应用研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Zhong, Shi-Hang
中科院分区：
文献类型：
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作者：
Li, Shu-Cai;Xue, Yi-Guo;Liu, Bin;Zhang, Qing-Song;Li, Shu-Chen;Zhong, Shi-Hang
岩溶裂隙地下水的精确即时预报是当前隧道设计和施工中需要研究和解决的关键问题。可以利用复杂信号分析提取多个参数进行综合判断。基于这一优点，将探地雷达（GPR）引入到水预测中，从幅度、频率和相位上分析雷达数据中水的响应，克服了判断标准单一的缺点，为探地雷达预测岩溶裂隙地下水提供了一种实用的方法。首先阐述了复信号分析的理论以及引入探地雷达信号处理的必要性。讨论了基于复信号分析的探地雷达预测岩溶裂隙地下水的可行性；并获得了估计水的标准。最后结合工程实例，对探地雷达数据进行了复信号分析，并对岩溶裂隙地下水进行了分析。结果表明，与开挖结果相比，复杂信号分析的应用大大提高了预测的准确性和可信度。
The precise and immediate forecasting karst-fractured groundwater is a key problem to be studied and resolved currently in tunnel design and construction. Complex signal analysis can be used to extract multiple parameters to make a synthetical judgment. Based on this advantage, it is introduced to the prediction of water with the ground penetrating radar (GPR) to analyze the water response in the radar data from amplitude, frequency and phase, which overcomes disadvantage that the judge criteria is single, and provides a practical method to predict karst-fractured groundwater with GPR. The theory of complex signal analysis and necessity to be introduced to GPR signal processing is first illustrated. Then the feasibility of the karst-fractured groundwater prediction with GPR based on complex signal analysis is discussed; and the criteria to estimate water is obtained. At last, with project example, the GPR data is processed in complex signal analysis and the karst-fractured groundwater is analyzed. It is shown that the application of complex signal analysis improves the accuracy and credibility of prediction greatly in comparison with the excavation result.