EARTHWORKS, RETAINING WALLS

FOUNDATIONS III. EXCAVATION WORKS, EXCAVATION WORKS, RETAINING WALLS,DEEP FOUNDATION

Dr. TAKÁCS Lajos GáborBUTE Department of Building Constructions

EARTHWORKS, RETAINING WALLSEARTHWORKS, RETAINING WALLS

EARTHWORKS, EARTHMOVINGS

BUTE Faculty Of Architecture Department Of Building Constructions Deep foundations © Dr. Takács Lajos Gábor

1. Grade bar/intersection of strings2. Organic topsoil (should be removed)3. Vertical adjustment4. Gravel bed5. Bottom level of cut (excavation works)

EARTHWORKS, EARTHMOVINGS

1. Adherent soil, small depth2. Loose soil, small depth3. Loose soil, large depth


EARTHWORKS


RETAINING WALLS AT EARTHWORKS

a, b., horizontal laggingc., vertical set of pilesd., anchored bulkhead


RETAINING PIERS FOR SAFE EARTHWORKS


TORKRET (SHOT CONCRETE) USED AS RETAINING CONSTRUCTION


SOLDIER PILES/BERLIN WALLS

Soldier piles, also known as king piles or Berlin walls, are constructed of wide flange steel H sections spaced about 2 - 3 m apart and are driven prior to excavation. As the excavation proceeds, horizontal timber sheeting (lagging) is inserted behind the H pile flanges.


STEEL PILES

Retaining wall supported by driven steelpiles


DEWATERINGDEWATERING

TYPE OF SUBSOIL WATER

a., seepage flow 1: loose soilb., entrapped water 2: adherent soilc., subsoil


DEWATERING OF THE CUT

a., open dewatering systemb., dewatering by drilled wells

1. Drain2. Gravel bed3. Water collecting 4. Basement wall (proposed)5. Retaining wall6. Pump7. Sunk water table


DEWATERING OF THE CUT WITH DRILLED WELLS


DEEP FOUNDATIONSDEEP FOUNDATIONS

REVISION: CLASSIFICATION ON THE DEPTH OF THE FOUNDATION

Deep foundations transfer thedead load of the building onto theloadbearing soil layers deep belowthe building.

Shallow foundation scheme Deep foundation scheme


REVIEW OF DEEP FOUNDATIONS

a., well foundation c., slurry trench wall b., prefabricated concrete pile foundation d., drilled pilesc., augercast pile


WELL FOUNDATION SYSTEM

superstructure

load distributingRC beams

well foundations


WELL FOUNDATION

Well foundation of a building with skeleton frame/loadbearing wall superstructure

a., foundation of an external wall/pierb., foundation of an intermediate pierc., cutting edge

1. Foundation well2. Cutting edge3. Concrete base plate4. Concrete4. Concrete5. Concrete cover plate6. RC grade beams7. RC grade beams8. Superstructure


PILE FOUNDATION SYSTEM


CLASSIFICATION OF FOUNDATION PILES BY MATERIALS

a., timber pileb., steel „T” profilec., steel piped., precast/prestressed reinforced concrete pilee., drilled pilef., augercast pileg., RC pier wit clevis h - i., block and the head of a precast RC pile

1. RC pile2. Steel block3. Hardwood bond plug4. Softwood backing5. Sawdust6. Textile rag backing7. Steel pile head


CLASSIFICATION OF FOUNDATION PILES

a., bearing pileb., friction piled., bearing and friction piled., tensile friction pile

1. Pile2. Load 3. Pulling force4. Lateral friction5. Point resistance6. Surface of the ground7. Level of the loadbearing soil


CONNECTION OF PILES AND SUPERSTRUCTURE

a., external loadbearing wallb., intermediate loadbearingwallb1., subsoil b2., subsoil waterc., skeleton framec1., subsoil waterc2., subsoil c2., subsoil

1. Pile (drilled or friction type)2. Grade beams3. Pile cap4. Loadbearing soil5. RC slab against the

pressure of subsoil water6. Surface of the ground7. Pile head8. RC beam9. Blinding


CONSTRUCTION OF A DRILLED PILE

a., earthworkb., reinforcementc., high slump concrete mix pumping and augercast withdrawnd., foundation pile is readye., connection to the superstructure

1. Augercast2. Excavation/pile machine3. Reinforcement4. Concrete fill and

augercast withdrawn5. Grade beam6. superstructure


HISTORIC TIMBER PILE FOUNDATION SYSTEM


PILE FOUNDATION SYSTEM - DRILLING


CONSTRUCTION OF IN-SITU RC PILE FOUNDATION

Reinforcement of the pile cap

Monolithic RC piles drilled without theaid of auxiliary tubes


CONSTRUCTION OF A DRIVEN PILE

1. Augercast driving with concrete plug2. Head of the pile3. Augercast withdrawn4. Ground surface5. Level of loadbearing soil6. Pile driver7. Superstructure


DRIVEN PILE CONSTRUCTION








SLURRY TRENCH WALLS

a., form alternatives of slurry trench wallsb., prefabricated trench wall elementsc., slurry trench walls used as foundationd., diffusion of the slurry in the different soil types (sand, gravel, gravel+sludge


SLURRY WALL GUIDE

Alternatives for slurry wall guide walls

Guide wall under construction


SLURRY WALLS

g., construction order of a slurry wall h., anchoring of the slurry walli., slurry wall with rib beam


CONSTRUCTION OF A SLURRY WALL

Series of interlockingvertical walls


ANCHORING OF SLURRY WALL

Temporary anchor process of construction:

a) b)

process of construction:

a) Drilling using auxiliary pipe;b) Placing the tensile rod;c) Concrete injection while simultaneously retracting the pipe;d) Tensioning then fixing the tensile rod.

c) d)


SLURRY TRENCH WALL SYSTEM(PRINCIPAL SECTION)

1. Slurry trench wall2. Anchoring2. Anchoring3. Head beam4. Level of loadbearing soil5. New building6. Base slab7. Bottom level of the foundation8. Water table9. Drainage system10. Gravel bed (horizontal drainage)11. Drainage pipe12. Water collecting well with pump


SLURRY WALL CONSTRUCTION


SLURRY WALL CONSTRUCTION


UNDERPINNING WITH MICRO PILES

a., vertical or inclined micro pilesb., relieving with RC beamc., relieving with steel beam and RC beamsd., relieving with micro piles


UNDERPINNING WITH CANTILEVERED NEEDLE BEAM


UNDERPINNING WITH CAST IN-SITU NEEDLE BEAM


UNDERPINNING WITH NEEDLE WALL


UNDERPINNING WITH CONCRETE PIER


FOUNDATION SPECIALITIES OF CHAIN BRIDGE, BUDAPEST


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EARTHWORKS, RETAINING WALLS