Magnetic Grout Detection Using Magnetometer
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Solution Overview
Problem
Current grouting technologies lack the ability to effectively detect the extent of grout penetration in subsurface regions, leading to inefficiencies, wastage, and potential gaps in hydraulic barriers, which are critical for ground stabilization and containment.
Innovation Solution
Incorporating magnetic grout that can be detected using a magnetometer, allowing for the determination of grout penetration depth and distribution by measuring changes in the magnetic field, enabling non-intrusive monitoring of grout spread without compromising the grout curtain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional grout injection methods are used, then grout can be injected into subsurface regions, but the extent of grout penetration cannot be detected
Solution Approach 1:
The patent applies the principle of using magnetic properties as a detectable characteristic of the grout material. By incorporating magnetic particles into the grout mixture, the grout acquires magnetic susceptibility that allows it to be detected by magnetometers, similar to how color changes are used for visual detection. This enables direct observation of grout penetration without complex additional systems.
Solution Approach 2:
The patent introduces magnetometers as intermediary detection devices that indirectly measure grout penetration by detecting the magnetic field disturbances caused by magnetized grout particles. This intermediary approach allows detection without direct contact with the grout and enables remote monitoring of penetration extent.
2Productivity
If grout injection is performed without penetration detection, then injection operations can proceed, but grout wastage and unnecessary borehole drilling occur
Solution Approach 1:
The patent implements a feedback mechanism where magnetometer readings provide real-time or near-real-time information about grout penetration extent. This feedback allows operators to monitor whether the grout has reached the desired depth and to adjust injection parameters accordingly, preventing both over-injection (wastage) and under-injection (ineffective treatment).
Solution Approach 2:
The patent enables preliminary assessment of grout penetration by taking magnetometer readings during or immediately after injection. This preliminary detection allows operators to determine before completing full injection sequences whether additional injection is necessary, thereby avoiding unnecessary grout consumption and borehole drilling.
3Reliability
If grout penetration extent is unknown, then grouting operations can be completed, but gaps in hydraulic barriers may remain
Solution Approach 1:
The patent replaces indirect mechanical detection methods (such as physical sampling or pressure monitoring) with magnetic field-based detection. By measuring magnetic susceptibility variations, the system directly maps grout distribution and identifies gaps in the hydraulic barrier, providing comprehensive spatial information about grout placement.
Solution Approach 2:
The patent utilizes changes in magnetic susceptibility as a parameter to track grout distribution. By measuring variations in magnetic field strength and direction caused by magnetized grout particles, the system transforms the invisible grout distribution into measurable magnetic parameters that reveal the extent and uniformity of barrier formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides accurate and non-invasive detection of grout penetration, optimizing grouting operations, reducing wastage, and ensuring the integrity of hydraulic barriers and ground stabilization.
Implementation Method 1
detecting the injected magnetic grout comprises detecting a magnetic field associated with the magnetic grout using a magnetometer
Data Source
Figure 1a~1d
Figure 2a~2b
Figure 3
AI summary
A method comprising detecting injected magnetic grout to provide an indication of penetration into an injection region of the injected magnetic grout.