Spread Foundation | open Foundation
Spread Foundation or open Foundation
The Foundation which is constructed over a large area to form a wide base over which the whole structure rests is called spread or open Foundation. These Foundations are made with increasing the base by making off sets.
It is a type of shallow Foundation. this type of Foundation is constructed in open excavation by increasing the area at the base of structure by means of offsets or batter. This is most common type of Foundation and is practicable for a depth of about 5 m and is generally convenient above the water table. This Foundation is provided for bridges of moderate height built on sufficiently firm dry ground. If the ground is not stiff the bearing surface is further extended by wide layers of line concrete at the bottom.
Method of construction
Excavate the Foundation trench to the exact width and to the designed depth. the bottom is well rammed and then Foundation lime concrete in layers is rammed and well compacted . Curing is done and then masonry work of pier or abutment is started . Offsets of 5 cm. Are left nevery header course of the masonry till the width of pier is reached . The pier may be constructed as per designed batter. Equal to the weight of soil excreted.
The Foundation which is constructed over a large area to form a wide base over which the whole structure rests is called spread or open Foundation. These Foundations are made with increasing the base by making off sets.
It is a type of shallow Foundation. this type of Foundation is constructed in open excavation by increasing the area at the base of structure by means of offsets or batter. This is most common type of Foundation and is practicable for a depth of about 5 m and is generally convenient above the water table. This Foundation is provided for bridges of moderate height built on sufficiently firm dry ground. If the ground is not stiff the bearing surface is further extended by wide layers of line concrete at the bottom.
Method of construction
Excavate the Foundation trench to the exact width and to the designed depth. the bottom is well rammed and then Foundation lime concrete in layers is rammed and well compacted . Curing is done and then masonry work of pier or abutment is started . Offsets of 5 cm. Are left nevery header course of the masonry till the width of pier is reached . The pier may be constructed as per designed batter. Equal to the weight of soil excreted.
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