A deposit of fine sand has a porosity 'n' and specific gravity of soil solids is G. The hydraulic gradient of the deposit to develop boiling condition of sand is given by–
The porosity of a certain soil sample was found to be 80% and its specific gravity was 2.7 Thecritical hydraulic gradient will be estimated as –
The strength of soil is usually identified by
The coefficient of active earth pressure is given by –
The bearing capacity of a soil depends on -
Maximum bearing capacity can be expected from –
Quick sand –
Taylor's stability number is equal to –
For a base failure, the depth factor Df is –
Which of the following earth pressrue theories is diretly applicable to bulk heads –
A/C to Terzaghi's Theory. The ultimate bearing capacity at ground surface capacity at ground surface for a purely cohesive soil and for a smooth base of a strip footing is –
According to Terzaghi's theory, the ultimate bearing capacity at ground surface for a purely cohesive soil and for a smooth base of a strip footing is 5.14.C where, C = unit cohesion of soil.
Rise of water table in cohesionless soils upto ground surface reduces the net ultimate bearing capacity approximately by –
Flow net is used for the determination of
A flow net is a graphical representation of two-dimensional steady-state groundwater flow through aquifers. Construction of a flow net is often used for solving groundwater flow problems where the geometry makes analytical solutions impractical.
According to skempton's formula for a surface footing of square shape , the net ultimate bearing capacity on a purely cohesive soil of cohesion c is
Undisturbed soil samples are required for conducting
Compression index on a soil helps to determine
When the degree of consolidation is 50%, the time factor is about
According to Bousinesq's theory, the vertical stress at a point in a semi-infinite soil mass depends upon
The process by which a mass of saturated soil is caused by external forces to suddenly lose its shear strength and to behave as a fluid is called
By using sieve analysis, the particle size distribution curve has been plotted for a particular soil. The coefficient of curvature Cc is given by
Given below are methods of compaction:
1. Vibration technique
2. Flooding the soil
3. Sheep-foot roller
4. Tandam roller
5. Heavy weights dropped from a height
The method suitable for cohesionless soils include
Th lime stabilization is very effective in treating :
Which one of the following has least bearing capacity ?
Black cotton soil is not suitable for foundatio because of its:
The depth of foundation is usually calculated from ?