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Model LPMH -Soil Settlement Measuring System
The system basically consists of a measurement probe containing a pressure transmitter that, via a hose on a reel, is connected to a liquid reservoir. The probe is pulled through the settlement pipe or drain line with intervals, (e.g. 1,00m, 2,00m, 5,00m etc). Recording the hydrostatic pressure at each interval results in the relative profile of the pipe`s level. By subsequently putting the probe on a fixed point outside the pipe it is possible to relate the pipe`s profile to the national grid level. By repeating the measurement with time intervals the progression of the settlement of the subsoil is determined in a very accurate manner. To ensure maximum accuracy each measurement is automatically compensated for variations in temperature and atmospheric pressure. The measurement vehicle is fitted with an automatic processor/datalogger so that the readings can be made available right on the spot, if so required.
Contrary to other systems available on the market, the LPMH - system does not require that the pipe itself is filled with water: the LPMH - unit has its own liquid system. Whether the pipe is empty or wholl y or partly filled with liquid (e.g. groundwater or drain water ) does not make any difference for the operation of the LPMH-system.
- Embankments
- Road foundations
- Waste disposal sites
- Underground pipes
- Directional drillings
- Sewage pipes
ADVANTAGES COMPARED TO LEVELLING RODS.
- More reliable and more accurate.
- No disruption or damage by earth moving equipment or other external influences.
- No point measurement but integral monitoring of the settlement over the entire profile.
- Easy to obtain a time settlement diagram for any point along the profile.
- Measurements can be continued after completion of the work. These measurements are reproducible with the first (zero-)measurement still fully