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

Influence line, determine the maximum positive and negative shear shear

determine the maximum positive and negative shear shear

Non uniform flow in open channe, A rectangular channel is 3 m in width and ...

A rectangular channel is 3 m in width and draws water from a lake. The channel slope is 0.001 and the Manning’s n is 0.0013. What will be the discharge in the channel when the lake

RCC, WHAT IS RCC

WHAT IS RCC

Difference between direct circulation and reverse drilling, Question Wh...

Question What is main difference between direct circulation drilling and reverse circulation drilling? Answer In straight circulation drilling and reverse circulati

Indicate quality of rock foundation, Question During piling works, norm...

Question During piling works, normally founding levels of bored piles are definite by using total core recovery or rock quality designation (RQD). Are there any problems by

Manufacturing technique of ferro cement, what are the manufacturing techniq...

what are the manufacturing techniques of ferro cement?

Tension member, Explain various forms of tension members.

Explain various forms of tension members.

Comparing speed, Question Comparing speed of "Formwork exceeding 300mm wide...

Question Comparing speed of "Formwork exceeding 300mm wide, horizontal and at any inclination up to and including 5o to horizontal" with speed of "Formwork exceeding 300mm wide, at

Chain, describe and sketch a survey chain

describe and sketch a survey chain

Construction of parabolic shapes, construct parabolic shapes using the enve...

construct parabolic shapes using the envelop method and the offset method with dimensions 80 by 120

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