MODEL EXPERIMENTS OF REAL-TIME MONITORING OF CHEMICAL GROUTING BY ELECTRICAL RESISTIVITY TOMOGRAPHY

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  • 比抵抗トモグラフィを用いた薬液注入のリアルタイムモニタリングに関する検討

Abstract

<p> In ground improvement by chemical grouting, monitoring the penetration of chemicals into the ground in real time enables efficient construction management. Because the chemical solution has an extremely low resistivity, resistivity tomography is considered to be effective as a monitoring method. In this paper, in order to compare resistivity section and the spread of injection chemicals visually, transparent ground models were constructed, and resistivity tomography were carried out while colored low resistivity chemical solution was injected from the two injection holes.</p><p> As a result, it was possible to roughly grasp the situation where the chemical spread in a spherical shape by resistivity. It was possible to capture the situation in which the spheres of the chemical solution injected from each injection holes were sufficiently attached, however it was difficult to capture the time when the two spheres just attached by resistivity tomography.</p>

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