Three-dimensional forward modeling and response characteristics analysis of foundation pit leakage electric-field considering electrokinetic effect
Three-dimensional forward modeling and response characteristics analysis of foundation pit leakage electric-field considering electrokinetic effect
复制标题
考虑动电效应的基坑漏电场三维正演建模及响应特性分析
DOI：
10.1007/s11770-022-0930-x
复制
发表时间：
2022-03
影响因子：
0.7
通讯作者：
Wang Shuo
中科院分区：
文献类型：
--
作者：
Chen Yu-Feng;Chen Hui;Deng Ju-Zhi;Liu Sui-Ming;Tang Wen-Wu;Wang Shuo
传统的地面直流电法由于精度低、抗噪声能力差，不适用于基坑地下连续墙渗漏检测。为此，提出了一种地表-钻孔联合观测装置进行泄漏电场检测，以实现对基坑内地面电场分布特征的快速测量，从而实现对泄漏点的快速定位。首先将动电效应形成的电场与传导电流形成的稳定电场结合起来，建立了复合漏通道中漏电场响应的机理和基本方程。然后，采用有限元-无限元耦合法求解电场方程，模拟了三维基坑渗漏模型的响应。此外，我们进行了不同的凹坑模型的数值模拟，以调查的检测装置的影响因素和泄漏通道的性质的变化的响应特性。结果表明，该井地联合观测装置能有效揭示泄漏引起的异常电位，EK产生的电场幅值能有效增强泄漏处的泄漏电场信号，提高了检测精度和效率。
The traditional ground direct current method is not suitable for leakage detection of underground diaphragm walls in foundation pits because of its low accuracy and poor antinoise ability. Here, we propose a joint surface-borehole observation device for leakage electric field detection to achieve rapid measurement of the electric field distribution characteristics at ground level in the foundation pit, thus enabling rapid localization of leakage points. We first establish the mechanism and basic equation of the leakage electric field response by combining the electric field formed by electrokinetic effect (EK) and the stable electric field formed by conduction current in a combined leakage channel. Then, the finite—infinite element coupling method is used to solve the electric field equation to simulate the responses of a three-dimensional foundation pit leakage model. Furthermore, we conduct numerical simulations of diff erent pit models to investigate the influencing factors of the detection device and response characteristics of the change in the properties of the leakage channel. The results demonstrate that the proposed joint surface-borehole observation device can efficiently reveal anomalous potential caused by leakage, and the amplitude of the electric field generated by EK can eff ectively strengthen the leakage electric field signal at the leakage, thus improving detection accuracy and efficiency.
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影响因子：
6.4
作者：
S. Straface;M. D. Biase
通讯作者：
S. Straface;M. D. Biase
影响因子：
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作者：
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通讯作者：
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挖掘过程中泄漏事故的法医诊断
DOI：
10.1061/(asce)cf.1943-5509.0001058
发表时间：
2017-10
影响因子：
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作者：
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影响因子：
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作者：
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作者：
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