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- Check the boredhole and bentonite slurry (or polyme) before testing.
- Locate the KODEN machine by crane.
- Input data.
- Place the winch unit over the top of boredhole or on the steel casing. Position the sensor at the center of the hole.
- Lower the sensor into bentonite slurry. Hole the sensor at depth approximately 1.00 to 1.50m for initial calibration.
- Apter calibrations, restore the sensor to the starting position and perform the test. The tests are carried out in downward monitoring and upward monitoring. Boredhole profile along 2 perpendicular axes are printed out immediately.
- Submit testing reports at the site.
- Testing reports are printed by the KODEN machine.
- Conclusion and recommendation (Location/depth where abnormality occurs such as reduction in diameter, or collapsed wall)
The purpose of the method is check some parametters of boredhole: size (diameter and depth), shape of the drilled hole (vertical level, tilt,...). Testing method: KODEN test utilizes the principle of ultrasonic wave travel from sensor to the wall of boredhole and reflect to the sensor through the bentonite slurry as a media. Wave travelling time varies with size of the hole so it can be interpreted to reflect characteristics of the hole accordingly. Testing procedure: According to the special procedures of each device manufacturer or according to its own standards by Design consultant regulations Testing step: |
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