The uplift pressure meter is used for monitoring uplift pressure
of water in the foundation of dams and concrete structures and the stability of
foundations of embankments in dams, tunnels and other underground works. It
provides significant quantitative data on the magnitude and distribution of
uplift pressure of water and its variations with time. It also provides the
pattern of seepage, zones of potential piping and the effectiveness of seepage
control measures undertaken.
The uplift pressure is measured mechanically by using a Bourdon
pressure gage or electronically by using a vibrating wire uplift pressure meter.
- The Model EPU-20G uplift pressure measuring system
incorporating Bourdon pressure gage is economical and easy to install. However
for taking readings, one has to go into the gallery.
- Model EPU-20V vibrating wire uplift pressure
meter allows remote monitoring of uplift pressure when connected to our datalogger.
It has a 25 mm
BSP adaptor for connection to the pipe. It is mounted through valves and
fittings on top of the perforated/non-perforated pipe. The system enables
reliable and fast measurement of uplift pressure.
The uplift pressure measuring
device consists of a perforated/non-perforated pipe of 50 mm dia of adequate
strength. The pipe is inserted in a drilled hole in the foundation from
the instrumentation gallery to the required depth. To the other end of the pipe in the gallery is connected with the uplift
pressure meter or a Bourdon pressure gage.The water oozing through
internal pores or seams in rock formations of dam foundations, mass concrete
/foundation soil of structures, reclaimed land soil etc. percolates upward
through the pipe to the sensor, which is read by a portable indicator or logged
by a datalogger with facility to transfer logged data to remote server.
