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Evaluation of Grouting Performance Using Electrical Resistivity Tomography

机译：使用电阻率断层扫描评估灌浆性能

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This study proposes a tomography-based method for evaluating grouting performance after injection. Tomography is a convenient approach for solving the boundary measurement inverse problem of capturing discrete pixels and synthesizing these pixels into a unified image. Four arrays of eight electrodes are installed into large triaxial cell specimens to simulate in-situ crosshole resistivity testing. Sand is used as a base material and a wet cement mixture is grouted into the specimens. Electromagnetic waves are used as a means of accumulating the physical properties of the specimens. Each measured electrical resistivity is considered as a discrete signal. The electrical resistivity distribution is calculated and optimized through an iterative modified least-squares inversion based on a forward solution of Coulomb and Gauss's law equations. Results show that the electrical properties of an injected grout material and its location and size can be effectively estimated from a series of resistance measurements.
机译：本研究提出了一种基于断层摄影的方法，用于评估注射后的灌浆性能。断层扫描是解决捕获离散像素并将这些像素合成到统一图像中的边界测量逆问题的方便方法。将四个八个电极阵列安装成大型三轴电池标本，以模拟原位的十字孔电阻率测试。用作基材用作基材，湿水泥混合物灌浆到标本中。电磁波用作积累样本物理性质的手段。每个测量的电电阻率被认为是离散信号。通过基于库仑和高斯的法律方程的前向解决方案，通过迭代修改的最小二乘反转来计算和优化电阻率分布。结果表明，可以从一系列电阻测量有效地估计注入的灌浆材料及其位置和尺寸的电性能。

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