• SOLDIER PILES AND LAGGING IS AN EARTH RETENTION TECHNIQUE THAT RETAINS SOIL, USING VERTICAL STEEL PILES WITH HORIZONTAL LAGGING.

• TYPICALLY, H-PILES ARE DRILLED OR DRIVEN AT REGULAR INTERVALS ALONG THE PLANNED EXCAVATION PERIMETER.

• LAGGING CONSISTING OF WOOD, STEEL OR PRECAST CONCRETE PANELS IS INSERTED BEHIND THE FRONT PILE FLANGES AS THE EXCAVATION PROCEEDS

.• THE LAGGING EFFECTIVELY RESISTS THE LOAD OF THE RETAINED SOIL AND TRANSFERS IT TO THE

PILES.

• PILE AND LAGGING WALLS HAVE THE ADVANTAGES OF BEING INEXPENSIVE, FAST AND EASY TO CONSTRUCT. THE MAJOR DISADVANTAGES OF SOLDIER PILE WALLS ARE THAT THEY ARE PERMEABLE AND THEREFORE CANNOT BE USED IN HIGH WATER TABLE AREAS WITHOUT EXTENSIVE DEWATERING.

THE MAJOR ADVANTAGES OF SOLDIER PILE WALLS ARE:

1. SOLDIER PILES ARE FAST TO CONSTRUCT. 2. SOLDIER PILE CONSTRUCTION IS CHEAPER WHEN COMPARED TO OTHER SYSTEMS.3. SOLDIER PILE INSTALLATION IS VERSATILE AND ADJUSTMENTS CAN BE MADE IN THE FIELD EASILY TO ACCOMODATE CHANGES.4. LAGGING CONSTRUCTION CAN BE VERY QUICK.5. CONSTRUCTION OF SOLDIER PILE AND LAGGING WALLS DOES NOT REQUIRE VERY ADVANCED CONSTRUCTION TECHNIQUES.

THE MAJOR DISADVANTAGES OF SOLDIER PILE AND LAGGING SYSTEMS ARE:

1. THEY ARE PRIMARILY LIMITED TO TEMPORARY CONSTRUCTION. 2. CANNOT BE USED IN HIGH WATER TABLE CONDITIONS WITHOUT EXTENSIVE DEWATERING.3. POOR BACKFILLING AND ASSOCIATED GROUND LOSSES CAN RESULT IN SIGNIFICANT SURFACE SETTLEMENTS. 4. THEY ARE NOT AS STIFF AS OTHER RETAINING SYSTEMS.5. BECAUSE ONLY THE FLANGE OF A SOLDIER PILE IS EMBEDDED BENEATH SUBGRADE, IT IS VERY DIFFICULT TO CONTROL BASAL SOIL MOVEMENTS.

I- SECTION SOLDIER CONCRETE LAGGING

SOLDIER PILE BEING DRIVEN IN

RASHIKA DHIILON3RD YR - B

BUILDING CONSTRUCTIONSOLDIER PILE AND LAGGING