초록 ▼

A leachate and pollutant drainage barrier system is formed by excavating a narrow slit or slot in the earth in the presence of a reversable slurry mud which changes from a highly viscous character after a predetermined period of time (approximately 5-7 days) needed to maintain the trench open to per

A leachate and pollutant drainage barrier system is formed by excavating a narrow slit or slot in the earth in the presence of a reversable slurry mud which changes from a highly viscous character after a predetermined period of time (approximately 5-7 days) needed to maintain the trench open to permit the laying of a drainage pipe at the bottom of the trench and the filling of the trench with a pervious fill, such as gravel, etc. After the fill has been installed, lateral support for the earth walls is provided by the pervious fill material and the slurry reverts to a liquid having a substantially lower viscosity which may be drained via the drain pipe in the bottom of the trench. In a preferred embodiment the slurry is a biodegradable polymer. In addition, a plastic film or layer can be installed in the trench.

대표청구항 ▼

A method of constructing an underground leachate and pollutant drainage barrier system comprising the steps of, (a) excavating an elongated trench in the presence of a highly viscous excavation slurry which changes to a low viscosity after a predetermined period of time, (b) installing a pumping sys

A method of constructing an underground leachate and pollutant drainage barrier system comprising the steps of, (a) excavating an elongated trench in the presence of a highly viscous excavation slurry which changes to a low viscosity after a predetermined period of time, (b) installing a pumping system extending to the bottom of said trench while said slurry is in the trench and before said slurry changes to its low viscosity character, and (c) filling said elongated trench with a pervious fill material before said slurry changes to its low viscosity character.