ARCH 243 RETAINING WALLS. Retaining walls Types of wall failure –Wall fracture –Overturning...

ARCH 243 RETAINING WALLS

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Transcript of ARCH 243 RETAINING WALLS. Retaining walls Types of wall failure –Wall fracture –Overturning...

$Page 1: ARCH 243 RETAINING WALLS. Retaining walls Types of wall failure –Wall fracture –Overturning –Sliding –Undermining.$

ARCH 243RETAINING WALLS

http://en.wikipedia.org/wiki/Image:Stone_Retaining_wall.jpg

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Retaining walls

Types of wall failure– Wall fracture– Overturning– Sliding– Undermining

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Retaining walls

Design Elements to Prevent Failure

Relieve H2O pressure(for all 3 types of failure)

– Crushed stone – Weeps

Overturning– Cantilevered

Footing– Reinforcing

Sliding– Key

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$Page 8: ARCH 243 RETAINING WALLS. Retaining walls Types of wall failure –Wall fracture –Overturning –Sliding –Undermining.$

Waterproofing

• Structures Below Ground subject to penetration of ground water

• More extreme, if below H2O table• Two basic approaches to Waterproofing

– Waterproof Membranes, or– Drainage– Generally - both used in tandem

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Waterproofing Membranes

• Materials– Liquid or Sheet (Plastic, asphaltic, synthetic

rubber)– Coatings (asphaltic)– Cementitious Plasters & admixtures– Bentonite clay

• Accessories– Protection Board– Waterstop

• Unit of Measure - SF, Mils (thickness)

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Stone & Perforated Pipe Drainage Mat & Perforated Pipe

Drainage Methods

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DampproofingTypically, a liquid asphalt

applied with a roller or sprayer

Not an effective barrier for water under pressure.BUT, will prevent ground

‘moisture’ from migrating through a wall.

Typically used in conjunction will drainage pipe.

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