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settlement gauges
Kingmach settlement gauges 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 settlement gauges
In road and railway subgrade work, settlement gauges help track how fill, soft ground, and pile-net foundations behave after each construction stage. The risk is not only final settlement; engineers also need to know whether movement slows after compaction, continues after traffic loading, or restarts after rainfall. Kingmach JMDL-47XXAT can measure in-situ subgrade settlement and embankment heave with 100 mm, 200 mm, 300 mm, and 400 mm ranges. For longer pavement profiles, JMYC-62XXAD wide-range differential pressure hydrostatic sensors can compare several points against a reference, with 500 mm to 4000 mm ranges and 0.1 mm resolution. A practical subgrade monitoring plan records fill height, compaction stage, traffic opening date, groundwater condition, and nearby deformation readings. This helps maintenance teams decide whether the roadbed is consolidating normally or needs inspection before track or pavement defects appear. The monitoring team should keep point location, reference condition, construction timing, groundwater or water level notes, and nearby sensor behavior in one review file so the settlement curve can be interpreted without guesswork during later maintenance. The monitoring team should keep point location, reference condition, construction timing, groundwater or water level notes, and nearby sensor behavior in one review file so the settlement curve can be interpreted without guesswork during later maintenance.
The future of settlement gauges
Future settlement gauges will be specified as part of mixed monitoring packages. Settlement alone may show that a point moved downward, but it rarely explains the cause. A railway subgrade package may combine settlement gauges, rainfall, pore pressure, tilt, and vibration. A bridge package may combine hydrostatic settlement, strain gauges, load cells, temperature, and deflection readings. A foundation pit package may combine single-point settlement, groundwater level, retaining wall displacement, and support force. Kingmach already has product groups across settlement, displacement, strain, load, tilt, environmental monitoring, acquisition hardware, cables, and software. The next practical improvement is selecting the settlement product together with the logger, cabinet, communication route, warning levels, and inspection actions. This lets the monitoring network answer a site question instead of producing separate curves that must be interpreted after the fact.
Care & Maintenance of settlement gauges
Manual-reading settlement gauges should follow a repeatable procedure every visit. Use the same reference mark, reading direction, tape handling method, waiting time, and data sheet format. This is especially important for magnetic ring settlement gauges and borehole water level readings, where inconsistent field practice can create false changes. Record operator, weather, groundwater condition, borehole obstruction, battery condition, and any unusual sound or visual indication from the alert system. Do not round readings differently from one visit to the next. If manual data is later entered into software, keep the original field notes available for checking. Manual monitoring can be reliable over many years when the process is simple, dated, and boringly consistent. The goal is repeatability, not speed.
Kingmach settlement gauges
Layered ground behavior is another reason to use settlement gauges. Kingmach JMCJ-1003/1005 magnetic ring settlement water level gauge measures underground layer settlement and groundwater level in foundations, subgrades, foundation pits, embankments, and other underground structures. Magnetic rings are installed in boreholes, and the probe emits audible and visual alerts when it senses a ring. Water level is detected through conductivity when the probe contacts water. The listed accuracy is plus or minus 1 mm, with 30 m, 50 m, and 100 m depth options. This method gives engineers a way to separate shallow settlement from deeper layer movement while also seeing water level variation. It is especially useful when soil behavior and groundwater are tied together. If the curve changes suddenly, field teams should check reference stability, cable or tube condition, recent work, and weather before treating the value as structural movement. If the curve changes suddenly, field teams should check reference stability, cable or tube condition, recent work, and weather before treating the value as structural movement.
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
Robert Taylor
The weir flow meter is well-built and delivers accurate measurements. Great value for water management applications.
Christopher Martinez
Very satisfied with the readouts & data loggers. User-friendly interface and supports multiple sensor inputs.
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