Method and apparatus for detecting the state of chemical solution injection, method and apparatus for chemical solution injection, and injection outer tube for measurement.
The chemical injection state detection method with integrated measurement devices addresses cracking injection issues by real-time detection and pressure adjustment, ensuring high-quality and uniform ground improvement.
JP7875099B2Active Publication Date: 2026-06-17PENTA OCEAN CONSTRUCTION CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PENTA OCEAN CONSTRUCTION CO LTD
- Filing Date
- 2022-10-21
- Publication Date
- 2026-06-17
AI Technical Summary
Technical Problem
Existing chemical grout injection methods struggle with cracking injection, leading to ground uplift and chemical leakage in heterogeneous soils, making high-quality ground improvement difficult to achieve.
Method used
A chemical injection state detection method using an injection outer pipe with integrated measurement devices (water pressure gauge, pH meter, thermometer, and ground deformation sensor) to detect cracking injection in real-time, adjusting injection pressure to prevent splitting and ensure uniform ground improvement.
Benefits of technology
The method reliably detects cracking injection early, allowing for real-time pressure adjustments to suppress its development, ensuring high-quality and uniform ground improvement by preventing chemical leakage and uplift.
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Abstract
To provide a method and device for detecting the state of chemical injection, a method and device for chemical injection for suppressing the development of cleavage injection, and an outer tube for measurement and injection that can be used in these methods and devices that can grasp the injection state during chemical injection underground in the chemical injection method and reliably detect cleavage injection.SOLUTION: In this method for detecting the state of chemical injection, an outer tube for injection 21 having a plurality of injection parts 22 is placed at a predetermined position in the ground. In order to detect the state of the chemical liquid injection while the chemical liquid is being injected into the ground from the injection part, the outer tube for measurement and injection has the plurality of injection parts 22 and a measurement port 32. At least one of a water pressure gauge, a pH meter, a thermometer, and a ground deformation measurement unit is provided near the measurement port. At least one of water pressure, pH, water temperature, and ground deformation at another predetermined location is measured by the outer tube for measurement and injection placed at another predetermined location adjacent to the predetermined location. Based on the measurement results, the injection state of the chemical solution is ascertained and it is determined whether or not it is a cleavage injection.SELECTED DRAWING: Figure 2
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