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The design of earth-retaining structures - Lecture 1

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Chris Bridges

Types of earth-retaining structures Lectures I gave at QUT in 2016

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The Design of Earth-retaining Structures ENB485 Chris Bridges May 2016 Lecture 1 Types of Earth-retaining Structures
Outline of Presentation Types of earth-retaining structures Embedded retaining walls – Secant walls – Contiguous walls – Diaphragm walls – Deep soil mixing – Sheet pile walls / Combi walls – Soldier Piles Gravity walls – L-shaped reinforced concrete – Mass gravity – Crib walls – Masonry/boulder walls – Soil nailing – Reinforced soil Micropiles Wall selection 5 May 2016 QUT ENB485 2
References • “Guide to Retaining Wall Design”. Geoguide 1, Geotechnical Engineering Office, Hong Kong • “Embedded retaining walls – guidance for economic design”. CIRIA C580, 2003 • “Embedded retaining walls-theory, practice and understanding”. B. Simpson and W. Powrie. Proc. 15th Int. Conf. Soil Mechanics & Foundation Eng., Istanbul, Vol. 4. • “Earth Retaining Structures”. B.F. Tanyu, P.J. Sabatini, & R.R. Berg. FHWA-NHI-07-071. National Highway Institute, Federal Highway Administration. 5 May 2016 QUT ENB485 3
01 Types of earth- retaining structure
5 May 2016 QUT ENB485 5 Fill Walls RC Wall Mass Gravity Wall Crib Wall Gabions Reinforced Soil Wall Insitu Walls/ Cuts Soil Nailed Wall Embedded Wall
5 May 2016 QUT ENB485 6 RSS – Reinforced soil structures Proprietary products
5 May 2016 QUT ENB485 7
02 Embedded retaining walls
5 May 2016 QUT ENB485 9
Secant Pile Wall 5 May 2016 QUT ENB485 10
Secant Pile Wall 5 May 2016 QUT ENB485 11
Secant Pile Wall 5 May 2016 QUT ENB485 12
Secant Pile Wall 5 May 2016 QUT ENB485 13
Secant Pile Wall 5 May 2016 QUT ENB485 14
Secant Pile Wall http://www.secantpile.com/sites/secantpiles/caststudies.aspx 5 May 2016 QUT ENB485 15
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 16
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 17
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 18
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 19
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 20
Contiguous Bored Pile Wall 5 May 2016 QUT ENB485 21
CFA Piling 5 May 2016 QUT ENB485 22
5 May 2016 QUT ENB485 23 BG28 Piling Rig CFA Piling Rig
5 May 2016 QUT ENB485 24
Diaphragm Wall 5 May 2016 QUT ENB485 25
Diaphragm Wall 5 May 2016 QUT ENB485 26
Diaphragm Wall 5 May 2016 QUT ENB485 27
Diaphragm Wall 5 May 2016 QUT ENB485 28
Diaphragm Wall 5 May 2016 QUT ENB485 29
Deep soil mixing 5 May 2016 QUT ENB485 30
Sheet Pile Wall 5 May 2016 QUT ENB485 31
Sheet Pile Wall 5 May 2016 QUT ENB485 32
Sheet Pile Wall 5 May 2016 QUT ENB485 33
Sheet Pile Wall 5 May 2016 QUT ENB485 34
Sheet Piles with tie-backs Cost effective height – 2m to 5m cantilevered 5m to 20m anchored 5 May 2016 QUT ENB485 35
Giken Silent Piling 5 May 2016 QUT ENB485 36
Combi walls 5 May 2016 QUT ENB485 37
Soldier Piles 5 May 2016 QUT ENB485 38 Typical detail – H-Pile placed into a pre-drilled borehole and backfilled with concrete
Soldier Piles 5 May 2016 QUT ENB485 39
03 Gravity walls
5 May 2016 QUT ENB485 41
L-Shaped Walls 5 May 2016 QUT ENB485 42
L-Shaped Walls 5 May 2016 QUT ENB485 43
Concrete Mass Gravity 5 May 2016 QUT ENB485 44
Concrete Mass Gravity 5 May 2016 QUT ENB485 45
Concrete Mass Gravity 5 May 2016 QUT ENB485 46
Crib Walling 5 May 2016 QUT ENB485 47
Crib Walling Usually manufacturers design Cost effective heights 2m to 11m 5 May 2016 QUT ENB485 48
Masonry Wall 5 May 2016 QUT ENB485 49
Boulder Wall 5 May 2016 QUT ENB485 50
Soil Nailing 5 May 2016 QUT ENB485 51
Soil Nailing 5 May 2016 QUT ENB485 52
Reinforced Soil Cost effective height 2m to 20m 5 May 2016 QUT ENB485 53
Shored Mechanically Stabilized Earth (SMSE) Wall Shored Mechanically Stabilized Earth (SMSE) Wall Systems Design Guidelines FHWA, 2006 5 May 2016 QUT ENB485 54
04 Micropiles
Micropiles 5 May 2016 QUT ENB485 56 NOT A WALL!!
Micropiles 5 May 2016 QUT ENB485 57 Protects the road, but the slope beneath the road is not supported
Micropiles 5 May 2016 QUT ENB485 58
Micropiles 5 May 2016 QUT ENB485 59
Micropiles 5 May 2016 QUT ENB485 60
Micropiles 5 May 2016 QUT ENB485 61
Micropiles - alternatives 5 May 2016 QUT ENB485 62
05 Wall selection
5 May 2016 QUT ENB485 64
5 May 2016 QUT ENB485 65
5 May 2016 QUT ENB485 66
Ref.: NAVFAC (1982) – “DM 7.1 Soil Mechanics”. US Dept of Navy, Naval Facilities Engineering Command, VA
5 May 2016 QUT ENB485 68
5 May 2016 QUT ENB485 69
5 May 2016 QUT ENB485 70
5 May 2016 QUT ENB485 71

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