Slurry Walls
Our previous work includes slurry walls for dam cut-offs, containment of ground water contaminants and ground water cut off for excavations.
Slurry cut off walls are used to create low permeability barriers that prevent the movement of ground water and contaminants within the ground water. They are commonly used for dam construction, construction of containment cells for in ground contaminants and prevention of ground water flow into excavations.
Slurry cut off walls are used to create low permeability barriers that prevent the movement of ground water and contaminants within the ground water. They are commonly used for dam construction, construction of containment cells for in ground contaminants and prevention of ground water flow into excavations.
The slurry wall is created by digging a trench under a cement bentonite slurry. The slurry both provides support for the (deep) trench excavation and self hardens to form the low permeability barrier. During excavation, the support from the slurry allows very deep trenches to be dug in granular soils, silts and soft clays. Depths range from 7m depth for conventional excavators, 15m for long reach excavators and 40m or greater using clam shell grabs.
The design of the grout slurry is tailored to achieve the liquid slurry density needed to support the trench in the short term and the long term strength and permeability requirements, typically in the order of 200kPa shear strength and 1 x 10-9 m/s permeability.
Slurry cut off walls are used to create low permeability barriers that prevent the movement of ground water and contaminants within the ground water. They are commonly used for dam construction, construction of containment cells for in ground contaminants and prevention of ground water flow into excavations.
Slurry cut off walls are used to create low permeability barriers that prevent the movement of ground water and contaminants within the ground water. They are commonly used for dam construction, construction of containment cells for in ground contaminants and prevention of ground water flow into excavations.
The slurry wall is created by digging a trench under a cement bentonite slurry. The slurry both provides support for the (deep) trench excavation and self hardens to form the low permeability barrier. During excavation, the support from the slurry allows very deep trenches to be dug in granular soils, silts and soft clays. Depths range from 7m depth for conventional excavators, 15m for long reach excavators and 40m or greater using clam shell grabs.
The design of the grout slurry is tailored to achieve the liquid slurry density needed to support the trench in the short term and the long term strength and permeability requirements, typically in the order of 200kPa shear strength and 1 x 10-9 m/s permeability.