Download pdf - Retaining Wall Isham

Transcript
  • 8/2/2019 Retaining Wall Isham

    1/53

    Prepared by : Noor Khazanah binti A Rahman

    Updated by : Isham Ismail

    RETAINING WALLS

    TEMBOK PENAHAN

  • 8/2/2019 Retaining Wall Isham

    2/53

  • 8/2/2019 Retaining Wall Isham

    3/53

  • 8/2/2019 Retaining Wall Isham

    4/53

    Simple concept of retaining walls

  • 8/2/2019 Retaining Wall Isham

    5/53

    Typical details behind retaining walls

  • 8/2/2019 Retaining Wall Isham

    6/53

    definition

    Is a structure designed and constructed to

    resist the lateral pressure of soil

    Required when it was desired change inground elevation that exceeds the angle of

    repose of the soil

  • 8/2/2019 Retaining Wall Isham

    7/53

    Types of RW

    Gravity wall

    Cantilevered

    Sheet pilling Anchored

  • 8/2/2019 Retaining Wall Isham

    8/53

    Gravity wall

    Gravity walls depend on the weight of their

    mass (stone, concrete or other heavy

    material) to resist pressures from behind For short landscaping walls, they are often

    made from mortarless stone or segmentalconcrete units

    Dry-stacked gravity walls are somewhatflexible and do not require a rigid footing in

    frost areas

  • 8/2/2019 Retaining Wall Isham

    9/53

  • 8/2/2019 Retaining Wall Isham

    10/53

    Cantilevered

    Cantilevered retaining walls are made

    from an internal stem of steel-reinforced,

    cast-in-place concrete or mortaredmasonry (often in the shape of an inverted

    T)

    This type of wall uses much less material

    than a traditional gravity wall

  • 8/2/2019 Retaining Wall Isham

    11/53

  • 8/2/2019 Retaining Wall Isham

    12/53

    Sheet pilling

    usually used in soft soils and tight spaces

    which are driven into the ground

    usually driven 1/3 above ground, 2/3 below ground, but

    this may be altered depending on the environment Taller sheet pile walls will need a tie-back anchor, or

    "dead-man" placed in the soil a distance behind the faceof the wall, that is tied to the wall, usually by a cable or arod

    Anchors are placed behind the potential failure plane inthe soil

  • 8/2/2019 Retaining Wall Isham

    13/53

  • 8/2/2019 Retaining Wall Isham

    14/53

    Anchored

    An anchored retaining wall can be constructed inany of the aforementioned styles but alsoincludes additional strength using cables orother stays anchored in the rock or soil behind it.

    Usually driven into the material with boring,anchors are then expanded at the end of thecable, either by mechanical means or often byinjecting pressurized concrete, which expands to

    form a bulb in the soil. Technically complex, thismethod is very useful where high loads areexpected, or where the wall itself has to beslender and would otherwise be too weak

  • 8/2/2019 Retaining Wall Isham

    15/53

  • 8/2/2019 Retaining Wall Isham

    16/53

    The concept,

    Refer to a cantilever retaining wall

    Is a freestanding structure without lateral

    support at its top It must resist the lateral pressures

    generated by loose soils or, in some

    cases, water pressures

  • 8/2/2019 Retaining Wall Isham

    17/53

    The concept,

    There is a lateral earth pressure behind

    the wall which depends on the angle ofinternal friction (phi) and the cohesive

    strength (c) of the retained material

    Required a drainage system to release

    hydrostatic pressure due to

    groundwater behind the wall.

  • 8/2/2019 Retaining Wall Isham

    18/53

    Use of retaining structure

    1) Protect steep slope from erosion.2) Protect specimen tree stands from

    fill or cut condition.3) Facilitate vertical circulation at steps

    or ramp structure4) Facilitate vehicular access in

    steeply, sloping wooded sites, suchas parks, camping areas or privateresidences.

  • 8/2/2019 Retaining Wall Isham

    19/53

    Use of retaining structure

    5) Maximize potential for developmentand/or building area to accommodate anextensive design program for school,

    play fields, outdoor theater etc.6) Extend the architecture of a building intosite and to express its functioning levels.

    7) Achieve an integrate visual appearance

    of the proposed development in relationto the existing site and surroundingdevelopment.

  • 8/2/2019 Retaining Wall Isham

    20/53

    function

    Retainning structure at slope area (cut and fill)

    Reduce risk slope failure

    For basement area

    To control settlement and movement

  • 8/2/2019 Retaining Wall Isham

    21/53

  • 8/2/2019 Retaining Wall Isham

    22/53

  • 8/2/2019 Retaining Wall Isham

    23/53

  • 8/2/2019 Retaining Wall Isham

    24/53

    Design requirement

    to be able to resist the material held in position withoutany movement such as falling, sliding and sediment

    Acting as aesthetic structure to stabilize or strength earth

    and rock slope Control soils erosion due to surface water or under

    ground water

    Aesthetic value for environment

  • 8/2/2019 Retaining Wall Isham

    25/53

  • 8/2/2019 Retaining Wall Isham

    26/53

  • 8/2/2019 Retaining Wall Isham

    27/53

  • 8/2/2019 Retaining Wall Isham

    28/53

  • 8/2/2019 Retaining Wall Isham

    29/53

  • 8/2/2019 Retaining Wall Isham

    30/53

  • 8/2/2019 Retaining Wall Isham

    31/53

    Erection Of RE Wall Panel At Jalan Bukit Kemuning

  • 8/2/2019 Retaining Wall Isham

    32/53

    Erect ion of RE Panel at abutment B viaduct over Bulatan Jubli Perak

  • 8/2/2019 Retaining Wall Isham

    33/53

  • 8/2/2019 Retaining Wall Isham

    34/53

  • 8/2/2019 Retaining Wall Isham

    35/53

  • 8/2/2019 Retaining Wall Isham

    36/53

  • 8/2/2019 Retaining Wall Isham

    37/53

  • 8/2/2019 Retaining Wall Isham

    38/53

  • 8/2/2019 Retaining Wall Isham

    39/53

  • 8/2/2019 Retaining Wall Isham

    40/53

  • 8/2/2019 Retaining Wall Isham

    41/53

  • 8/2/2019 Retaining Wall Isham

    42/53

  • 8/2/2019 Retaining Wall Isham

    43/53

  • 8/2/2019 Retaining Wall Isham

    44/53

    Rock Failure

  • 8/2/2019 Retaining Wall Isham

    45/53

    Rock failure guided by discontinuity

  • 8/2/2019 Retaining Wall Isham

    46/53

    Rock failure guided by discontinuity

  • 8/2/2019 Retaining Wall Isham

    47/53

    Rock failure guided by discontinuity

  • 8/2/2019 Retaining Wall Isham

    48/53

  • 8/2/2019 Retaining Wall Isham

    49/53

    Rockstructures

  • 8/2/2019 Retaining Wall Isham

    50/53

    Thestereographicplot of potentialinstabilityanalysis andtypes of failuremode (Hoek

    and Bray,1981)

  • 8/2/2019 Retaining Wall Isham

    51/53

    Natural slope failure

  • 8/2/2019 Retaining Wall Isham

    52/53

  • 8/2/2019 Retaining Wall Isham

    53/53


Recommended