On what Basis Depth of Foundation depends?

On what Basis Depth of Foundation depends?

First step in designing the foundation for a particular structure is soil investigation. The soil consultant should interact with other members of the construction team, namely architect & structural engineer to determine the type and extent of tests to be conducted for a particular structure. To facilitate the structural engineer in selecting a suitable foundation type/ system, the soil investigation report should essentially give the following data:-

a) Soil Profile/Bore log, along with soil identifation and classification

b) Location of Water Table, if encountered.

c) Proposed Foundation Depth w.r.t NGL

d) Proposed finished Ground Level

e) Proposed Plinth level of the Buildings

f) The net Bearing Capacity of various types of Foundations based on suitable field/ laboratory test and detailed calculations.

WHAT SHOULD WE DO AFTER CASTING SLAB?

WE SHOULD PROVIDE GROUTING AFTER SLAB CASTING TO FILL UP THE VOIDS.

Infiltration vs Permeability

Infiltration:

                   Infiltration refers to the downward entry or movement of water into the soil surface. It is a measure of the rate at which soil is able to absorb rainfall or irrigation. It is determine by a soil characteristics including ease of entry, storage capacity, and transmission rate through the soil. 

Permeability:

                      It is measure of ability of a porous material to allow fluid to pass through it. High permeability will allow fluids to move rapidly through rocks. Permeability is affected by the pressure in a rock.

Concrete vs stone, timber and steel

 Why Concrete is superior to stone, timber and steel ?

• Stone, timber and steel cant be fit to any mould but concrete can fit to any mould.
• Structure made of stone, timber and steel have several joints but different element of concrete  can be cast monolithically.

Circular Beam

Why we are not constructing circular beam ?

In case of beam all the stresses are at top and bottom. Circular area is maximum area at center, where we don't have any bending. To overcome stresses we need to provide steel at top and bottom. but in case of circular beam its not possible to provide steel at top and bottom.

Retaining wall vs Buttressed retainning wall

What is the difference between Retaining wall and Buttressed retainning wall ?

Main difference in buttressed retaining wall is we provide thin slab at some intervals to tie base slab and stem in order to reduce the shear force and bending moment.