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gnss settlement sensors
Kingmach gnss settlement sensors include the JMDL-47XXAT smart single-point settlement gauge for buried positions where a defined vertical movement must be followed through construction. It is used for subgrade settlement, embankment heave, base uplift in deep foundation pits, tunnel bottom uplift, dyke compression deformation, and pile foundation settlement. Published range options are 100 mm, 200 mm, 300 mm, and 400 mm. Resolution is 0.01 mm on 100 mm and 200 mm models, and 0.1 mm on 300 mm and 400 mm models. Gauge lengths cover 760 mm, 1240 mm, 1720 mm, and 2210 mm. The assembly includes a settlement plate, electrical displacement sensor, measuring rod with metal flexible conduit, anchor head, extension rod, and bottom anchor head. Its side-exit cable design helps reduce interference during pavement compaction. The product is strongest when the installation depth, plate location, cable route, fill layer, and first stable reading are documented before the buried parts disappear under later work.
Application of gnss settlement sensors
In foundation pit projects, gnss settlement sensors are used during staged excavation to track base uplift, nearby pavement settlement, groundwater response, and vertical movement around retaining systems. The timing of each value matters because deformation may change after dewatering, support installation, soil removal, rainfall, or backfilling. Kingmach JMDL-47XXAT can be embedded to follow base uplift or local settlement, while JMCJ-1003/1005 can read magnetic ring depth and groundwater level in boreholes. Hydrostatic instruments may be added where several elevations around the pit need comparison against a reference. The site team should record excavation depth, support level, water pumping condition, adjacent road or building observations, and first stable baseline beside the settlement curve. If movement grows quickly, the response should include checking the sensor and reference first, then comparing support force, wall displacement, groundwater, and visual inspection before deciding whether excavation can continue. This keeps settlement review tied to the actual construction sequence, which is essential because a pit may behave differently at each excavation depth and support stage. A clear record also helps distinguish base rebound from surrounding ground loss or reference disturbance. The review file should also include reference condition, recent site work, nearby sensor behavior, and inspection notes so later teams can interpret the curve clearly.
The future of gnss settlement sensors
Future gnss settlement sensors will make long-term maintenance analytics more practical. Settlement records are often slow, which means the useful signal may appear over months instead of days. Platforms can compare cumulative settlement, daily rate, seasonal pattern, rainfall, groundwater, traffic loading, filling stage, and excavation history. Kingmach products such as JMYC-62XXAD and JMDL-47XXAT can support this longer view when the baseline and reference point remain stable. Owners will benefit from reports that separate normal consolidation from renewed deformation after new construction, water-level change, or heavy traffic. This is especially important for roadbeds, bridges, buildings, dykes, dams, and reclamation foundations where movement may continue after handover. Future reports should show rate changes, dormant periods, and renewed activity in a way maintenance teams can compare across many assets.
Care & Maintenance of gnss settlement sensors
Remote acquisition for gnss settlement sensors needs commissioning checks across the whole data chain. Verify RS485 wiring, bus address, power supply, channel name, units, reference point, and platform display before routine collection begins. For Kingmach hydrostatic sensors and automated settlement systems, move through each channel and confirm that the displayed point matches the physical location. Label cabinets, cables, tubes, and sensor numbers clearly. During operation, data gaps should be compared with power outages, communication faults, storms, cabinet work, or platform changes. If a sensor is replaced, record the old serial number, new serial number, old baseline, new baseline, and reason for replacement. Remote data is only trustworthy when the physical point and digital channel stay aligned. The record should include who inspected the point, what changed on site, and whether nearby instruments showed the same trend, so the maintenance team can separate sensor trouble from real settlement. The record should include who inspected the point, what changed on site, and whether nearby instruments showed the same trend, so the maintenance team can separate sensor trouble from real settlement.
Kingmach gnss settlement sensors
gnss settlement sensors are not only construction instruments; they also support long-term asset management. A bridge, dam, subway, railway, building, or embankment can continue moving slowly after the main construction phase is complete. Kingmach settlement products can help owners compare early baseline readings with later operation-stage data. The important question is whether movement has stopped, slowed, restarted, or changed after water level, traffic load, rainfall, excavation, or repair work. A clean settlement record should include cumulative value, daily or monthly rate, reference condition, sensor status, and inspection notes. When the same point is reviewed for years, small changes become easier to interpret. Without that record, later teams may waste time rediscovering what the original installers already knew. Over time, this disciplined record helps owners separate normal consolidation from renewed settlement caused by water, load, excavation, or long-term material behavior. Over time, this disciplined record helps owners separate normal consolidation from renewed settlement caused by water, load, excavation, or long-term material behavior.
FAQ
Q: What is JMCJ-1003/1005 used for?
A: It is used to measure layered underground settlement and groundwater level in foundations, subgrades, foundation pits, embankments, and underground structures.
Q: How does magnetic ring settlement reading work?
A: Magnetic rings are placed underground; when the probe senses a ring, audible and visual alerts help the operator read depth from the steel tape at the borehole.
Q: How is water level detected?
A: The water level component works by water conductivity and alerts when the probe contacts water.
Q: What accuracy is listed?
A: The listed measurement accuracy is plus or minus 1 mm.
Q: What field records are needed?
A: Keep borehole number, magnetic ring depth, previous reading, current reading, groundwater level, and operator notes together.
Reviews
David Wilson
We purchased displacement transducers and settlement sensors, and the quality exceeded our expectations. Easy installation and reliable performance.
Joshua Clark
We ordered a full monitoring solution including sensors and data loggers. Everything works seamlessly together. Great supplier!
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