Aplication of Grouting in Dams

Construction

UĞUR ÖZ

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OUTLINE

Dams

How grouting used in dams

Types of dams

Compare types of dams

Conclusion

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DAMS

Is a solidbarrierconstructed

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Structure of Dam

Heel

Gallery

Toe

Spillway(inside dam)

Crest

NWLNormalwater level

MWLMax. level

Free boardSluice way

Upstream Down stream

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HOW GROUTİNG İS USED İN DAMS???

Grout curtains are used under dams

where the foundation would otherwise

pass too much seepage, or pass

dangerous seepage. These curtains are

never completely water-tight; the

reduced amount of seepage passing

through them should be picked up in

drainage holes downstream of the

curtain.

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HOW GROUTİNG İS USED İN DAMS???

• Exaggerated example showing wide cracks

in a foundation emptying a dam where there

is no grout curtain. The seepage passes

underneath and emerges downstream.

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Grout penetrates

out from the

holes to provide a

more or less

continuous

'curtain' in the

foundation.

The grouting is often done before

constructing the dam

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When slight seepage

passes through the curtain it

should be picked up by a row

of drainage holes. These

discharge to a low pressure

region such as a gallery in the

dam. They provide a 'safety

valve' for the dam.

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Typical layout of grout holes in a grout curtain

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DAMS

• CONCRETE DAMS

• EMBANKMENT DAMS

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TYPES OF DAMS

Concrete Dams

i. Concrete gravity dams

ii. Concrete arch dams

iii. Concrete buttress dams

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TYPES OF DAMS

Gravity Dams

• Made from concrete

ReservoirForce

uses a triangular cross-section and steep upstream face

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GRAVİTY DAMS

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Arch Dams:

ARCH DAMS

These type of dams are concrete or masonry dams which are curved or convex upstream in plan

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ARCH DAM

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Buttress dams have a concrete

face retaining the water; the face

is supported by buttresses at

intervals

Buttress Dam:

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BUTTRESS DAMSPrep.by UĞUR ÖZ

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Fill (Embankment) Dams

i. Earth dams

ii. Earth and rock fill dams

iii. Conrete faced rock fill dams

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EMBANKMENT DAMS

• They are massive dams made of earth and rock.

• Embankment dams are also armed with a dense, waterproof core that prevents water from seeping through the structure.

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EMBANKMENT DAMS GROUTİNG

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EMBANKMENT DAMS

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Low cost

Materials are easy to find

Easy to build

Does not last as long as concrete dams

Advantages of Fill Dams

Disadvantage of Fill Dams

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Last longer than fill dams

Can not be washed away easily

More expensive

Advantages of Concrete

Dams

Disadvantage of ConcereteDams

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IN CONCLUSION

Dams don't last forever.

Hot and cold weather makes

them crack. Eventually, every

dam must be repaired, removed,

or replaced.

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ANY QUESTIONS ??

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