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Q. What is Raft Foundation?
A raft or mat is combined footing that covers the entire area beneath a structure and supports all the walls and coloumn when the allowable soil pressure is low or the building loads are heavy the use of spread footing would cover more than one half of the area and it may prove more economical to use mat or raft foundation. They are also used where the soil mass contains compressible lenses or the soil is sufficiently erratic so that the differential settlement would be difficult. Raft foundation is also used to reduce settlement above highly compressible soil by making the weight of structure and raft approximately equal to the weight of the soil excavated. Ordinary rafts are designed as reinforced concrete flat slab.
Define Emerging Trends in Bearings? New innovations have taken place in the area of bridge bearings, notable among them are: (1) Shock Transmission Unit (STU) or Lock Up Dev
calculate bending &shear force of 16kn/m and draw the shear force and bending moment diagrams
The steel oil container shown in the figure has a circular lid centred on its sloping wall. The lid is hinged at A and held closed with a frictionless stopper at B. The lid is made
Explain Statically Indeterminate Structures Fall into two categories: 1. Beam problems with additional supports/restraints 2. Axial bar members subjected
Q. Necessity of pile tip cover for rock-socketed H-piles? In current practice concrete cover is generally provided at the pile tips of pre-bored H-piles socketed in rock. The o
Physical Tests on Cement (a) Soundness Test: by sieve analysis, it is conducted. 100 gms of cement is taken and sieved throughout IS sieve No. 9 for fifteen minutes. Residue on
what are its basics?
Design a Cylindrical Open Caisson to be sunk by 30 m of sand to support a load of 50 MN. The allowable bearing pressure is 1700 kN/m 2 . Test the feasibility of sinking the caisson
Explain about Lee-Mccall system
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