Explain forty-five degree spread rule for driven piles, Civil Engineering

Assignment Help:

Q. Explain Forty-five degree spread rule for driven piles ?

For driven piles the length of piles driven into the ground is generally based on dynamic driving formula such as Hiley's formula. In certain ground (for example chalk) the length of piles driven by adopting pile-driving formulas can be far more than adequate since the soil strength may increase with time. In contrast, in silty soils phenomenon of false set can appear and the piles give a false impression of attaining sufficient bearing resistance from the ground. Henceforth the pile's capacity must be verified and checked later by loading test. 

In case driven piles are founded on different depths below ground, 45-degree spread rule is generally applied to check their load carrying capacities. The base bearing loads of higher driven piles are presumed to spread at 45 degrees from their bases and checking is made if loads from higher piles would influence or get transmitted to deeper ones.


Related Discussions:- Explain forty-five degree spread rule for driven piles

High and narrow beams, Question Give a reason that why are high and na...

Question Give a reason that why are high and narrow beams not desirable in concrete piers? Answer Supported on past experience in other, high and narrow beams after

Define the cavitation - underwater inspection of bridge, Define the Cavitat...

Define the Cavitation - underwater inspection of bridge? Cavitation damage is caused by repeated impact forces caused by collapse of vapour bubbles in rapidly flowing water. Th

Illustrate the term - failure due to rupture of steel, Failure Due to Ruptu...

Failure Due to Rupture of Steel This mode of  failure is likely in lightly reinforced concrete members in which the ultimate strength of  steel is attained before the concrete

Surveying, obstacle to ranging but not chaining inthat when line may not vi...

obstacle to ranging but not chaining inthat when line may not visible from intermediate point pls if required explain with diagram

Determine the viscosity of water, A soil sample consists of particles rangi...

A soil sample consists of particles ranging in size from 0.6 mm to 0.02 mm. The average exact gravity of the particles is 2.66. Verify the time of settlement of the coarsest and fi

Calculate dead, A building cross section is shown below. The building consi...

A building cross section is shown below. The building consists of eight (8) of the shown frames placed at distance of 20 feet oc for a total length of 140 feet. The glulam beams ar

Reasons of using compressed air as drilling fluid, Q. Reasons of using comp...

Q. Reasons of using compressed air as drilling fluid? For rotary drilling in ground investigation works, drilling fluid is generally used to clear and clean the cuttings from t

#title., what is the cause of scale and sludge formation and its diadvantag...

what is the cause of scale and sludge formation and its diadvantages

Advantages and disadvantage of using timber fenders, Question What are ...

Question What are advantages and disadvantage of using timber fenders , plastic fenders and rubber fenders ? Answer Timber fenders - They are low in power and a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd