By Ruwan Rajapakse
All items and constructions move their load both at once or ultimately to the earth. The means of the earth to aid such quite a bit depends upon the energy and balance of the assisting soil or rock fabrics. Pile foundations are the a part of a constitution used to hold and move the weight of the constitution to the bearing flooring positioned at a few intensity less than floor floor. there are lots of texts on pile foundations. commonly, those books are complex and hard to appreciate. effortless to exploit and comprehend, this e-book covers nearly each topic referring to pile layout, that includes strategies that don't seem in different books at the topic. The e-book includes layout equipment with genuine existence examples on pin piles, bater piles, concrete piles, metal piles, bushes piles, auger forged piles, underpinning layout, seismic pile layout, unfavorable dermis friction and layout of Bitumen lined piles for destructive dermis friction and plenty of different matters. The ebook is full of layout examples, case stories and after development eventualities are awarded for the reader's advantages. This ebook allows the reader to come back away with a whole and finished figuring out of the problems on the topic of the layout, set up and building of piles. * convenient consultant for engineers perparing the pro engineer (PE) examination. * Nomrous layout examples for sandy soils, clayey soils, seismic loadings * Methodologies and case stories for various pile varieties
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Additional info for Pile Design for Structural and Geotechnical Engineers
When H-piles are driven, both analyses should be done (unplugged and plugged) and the lower value should be used for design. Unplugged: Low end bearing, high skin friction; Plugged: Low skin friction, high end bearing. 9 Splicing of H-piles 22 Pile Design and Construction Rules of Thumb • Step 1: The sleeve is inserted into the bottom part of the H-pile as shown and bolted to the web. • Step 2: The top part of the pile is inserted into the sleeve and bolted. Guidelines for Splicing (International Building Code) IBC states that splices shall develop not less than 50% of the pile bending capacity.
3 Hollow Tubular Section Concrete Piles • Most hollow tubular piles are post-tensioned to withstand tensile stresses. • Hollow tubular concrete piles can be driven either closed end or open end. A cap is fitted at the end for closed end driving. 27 Chapter 2 Pile Types • These piles are not suitable for dense soils. • Splicing is expensive. • Cutting off these piles is a difficult and expensive process. It is very important to know the depth to the bearing stratum with reasonable accuracy. 4 Driven Cast-in-Place Concrete Piles • STEP 1: The steel tube is driven first.
12 Open-end pipe pile and closed-end pipe piles 24 Pile Design and Construction Rules of Thumb Ideal Situations for Open-End Pipe Piles • Soft layer of soil followed by a dense layer of soil • Site condition: Soft layer of soil followed by a hard layer of soil. Soft soil • Open-end pipe piles are ideal for this situation. After driving to the desired depth, soil inside the pipe is removed and concreted. Dense soil • Closed-end pipe piles also could be considered to be ideal for this type of situation.