Grout curtain

Grout curtain

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Encyclopedia
Grout curtains are barriers that protect a dam
Dam
A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

 from seepage and can be used in initial construction or repair. Additionally, they can be used to strengthen foundations and contain spills.

Characteristics


A grout curtain usually consists of a row of vertically drilled holes filled with pressurized grout
Grout
Grout is a construction material used to embed rebars in masonry walls, connect sections of pre-cast concrete, fill voids, and seal joints . Grout is generally composed of a mixture of water, cement, sand, often color tint, and sometimes fine gravel...

, a process commonly known as pressure grouting
Pressure grouting
Pressure grouting involves injecting a grout material into generally isolated pore or void space of which neither the configuration or volume are known, and is often referred to simply as grouting. The grout may be a cementitious, resinous, or solution chemical mixture. The greatest use of...

. The the holes are drilled in intervals and in such a way that they cross each other, creating a curtain.

Method


Grout is injected with grouting jets, which use a high-pressure fluid stream (i.e., slurry or water) to erode a cavity in the soil.

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