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CONCRETE FOUNDATION DESIGN FORMOUNTING STRUCTURES 

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1.25MW solar PV Plant CONCRETE FONDATION Doc No AIC-KSEB-EDYR-ME-SS-

401

EDAYAR Rev No  0 date 22-12-2015

2

Plot No 84,Kavuri Hills Phase-2,Madhapur,Hyderabad 500034

Andhra Pradesh Ph +91 40 23558701 fax+91 40 23111550

As per IS 2911 ( part 1 / sec 2) , clause 5.3.1.1 ,

Resisting force due to skin friction

p1 = 0.5 x k pc x ρ soil x H x A pit x tan(ө)

P1 = 6.85 kN

Resisting force due to cohesion p2 = A pit x α x C = 4.80 kN

Total resisting loads on pile with concrete p = p1 + p2 = 11.65 kN

Net allowable load after considering the factor of safety for soil

The minimum factor of safety shall be taken as 2.5 for the soil layers

Resisting loads for soils ps = p / 2.5 = 4.66 kN

As ps = 4.66 kN > Fnet = 3.54 kN

HENCE SAFE

Note :- 1) In this design even we are not considered pedestal height 100 mm

above ground .

2) Final depth of foundation will be finalized after pull out test results.