Syphon drain system
Slope stability
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The siphon drain® process is an innovative and proven solution for unstable slopes developed by TP Geo, France. Wells are installed in or above the unstable zone of a slope and are pumped using siphons driven by the fall in elevation. The wells reduce the pore pressure, increasing the effective stress and stabilising the slope. Priming of the siphon is controlled by an automatic flushing system located at the downstream outlet of each siphon pipe. This system enables the siphon to operate intermittently at low flows, maintaining the prime by preventing the build-up of air in the siphon. At high flows the flushing system automatically switches to continuous running. Greater drawdown can be achieved with pneumatic pumped wells. We have worked with TP Geo over the last 10 years and have a partnership agreement for projects in the UK and Ireland.