SUPPORT SYSTEM FOR DEEP EXCAVATIONS

• Soil Nailed Walls with Shotcreting

Soil nailing is an engineered earth retention method that utilizes an array of grouted tensile elements (“soil nails”) combined with a well-drained wire mesh and shotcrete facing to create a stable reinforced soil mass. Soil nailing can be used for temporary or permanent earth support applications and is particularly effective in limited-access areas and/or for irregularly-shaped excavations.

• Touch Piles/Secant Piles with or without Waler Beam and Ground Anchors

Secant Pile Walls consist of a series of overlapped cast-in-place concrete cylinders that form a continuous wall. The diameter, spacing, depth and structural reinforcement of the cylindrical elements are engineered to meet specific project needs and subsurface site conditions.

• Grouting

Grouting is the injection of pumpable materials into a soil or rock formation under pressure to change the physical characteristics of the natural formation.

De-watering systems :-

• Dewatering Sump system

Sump pumping is the simplest dewatering technique, whereby groundwater is allowed to seep into the excavation, and is then collected in sumps and pumped away for disposal.

• Deep well dewatering system

Wellpoint system consists of a series of small diameters well points connected via a header pipe, to the suction side of a pump. The pump creates a vacuum in the header pipe, drawing water up out of the ground.