Pile group design example pdf

Pile group carries a vertical load of 5000 kn including the weight of the pile cap. Solution stress distribution begins at the bottom of the pile group in stiff clay media. For example, pile foundations are often required when. Piles are used to transfer the load beyond the zone of possible moisture changes in collapsible soils. Example 2 timber piles, 25 log with 10 point diameter, were driven through a silty sand with. Pile supported foundation pile cap analysis and design based on a geotechnical study, a pile supported foundation is required to support a heavily loaded building column. A brief outline is given of the basis of analysis used in two computer programs, piglet and defpig, for analysis of pile group response. Pdf in his 2000 rankine lecture, professor atkinson has emphasised. Comprehensive design examples are presented in publication.

Observed efficiencies of square pile groups in sand. Analysis and design of pile groups 29 1 the ratio of load on pile to the average pile load in the group p p av, and is plotted against the normalised pile spacing sd. A reinforced concrete slab or block which interconnects a group of piles and acts as a medium to transmit the load from wall or column to the piles is called a pile cap. H pressure distribution and divide the layer into two equal layers. Pile design and construction practice, fifth edition civil engineering. The calculation checks the design of pile caps supporting a single column with. Design limits prevent it to deliver as much energy as single acting, but greater speed, used mostly for sheet piles. However, this manual is intended to provide examples and procedures of proven. Pdf analysis and design of pile groups researchgate. A comparison of the capabilities of each program is. Design and construction of driven pile foundations volume i fhwa. Pile supported foundation pile cap analysis and design. European commission joint research centre institute for the protection and security of the citizen contact information address.

Examples of pile capacity computations are presented in appendix d. The load carried by an individual pile or group of piles in a foundation depends upon. In this manual, a pile foundation will be broadly described as one in which. The pile cap should normally be rigid so as to distribute the forces equally on. There are eleven design examples, which are arranged in three tracks as listed in the table below.

A pile cap is defined as a concrete block cast on the head of a group of piles, to transmit the load from the structure to the group of piles. Piles are 80 cm in diameter and spaced at 2m center to center in either direction. Structure of the guide introduction to pile foundations pile foundation design load on piles. Instructional materials complementing fema p751, design examples pile pier foundations view of cap with column above and piles below foundation design 29 passive resistance see figure 4. Grade of concrete m 30 grade of steel fe 500 size of column 680 x 300 mm axial force 1560 kn moment mx 339 knm moment mz 0. Design the pile cap shown in the following figure with 12 in. A comprehensive lrfd design example problem is presented and solved to demonstrate the development and application of design charts using both static and field analysis methods. Fm 54 chapter 7 distribution of loadson pile groups section i. This design example is for end bearing piles that are driven through cohesive soil and tipped out in rock. This video demonstrates the tekla tedds rc pile cap design calculation to the eurocode. Instructional materials complementing fema p751, design examples. Structural design of reinforced concrete pile caps the strutandtie method extended with the stringerpanel method december 2006 a.