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5612BESGAdvanced Measurement and Contract Administration

Faculty of Engineering and Technology. Department of the Built Environment. 5612BESGAdvanced Measurement and Contract Administration. Lecture number 2 (week 2). Lecture title: Complex Foundations. In this session…. Identify various foundation options

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5612BESGAdvanced Measurement and Contract Administration

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  1. Faculty of Engineering and Technology Department of the Built Environment 5612BESGAdvanced Measurement and Contract Administration

  2. Lecture number 2 (week 2) Lecture title: Complex Foundations

  3. In this session… • Identify various foundation options • Student activity, produce a piling take off list • Recap of assessment piling take off list • Evaluate NRM1 Substructure section and cost plan description build up • How to measure substructure quantities

  4. Learning outcomes • At the end of this session you should be able to: • Identify various foundation options available, when to use, advantages and disadvantages • Read piled foundation drawings to extract the information you require to cost the associated works • Be able to produce a “take off” list inline with NRM1 requirements for piling works/foundation • Know exactly what is required to be “taken off” / measured and therefore costed for your AS1 Report (cost plan) assessment • Know how to create a description for each “take off” item, inline with NRM1 for the detailed cost plan element of AS1 Report (cost plan) • How to measure the quantities associated with the take off list

  5. Feedback: • What do you understand feedback from LJMU to be?

  6. NRM1 - Complex Foundations - Piling

  7. Foundation Types: • What are the different types of foundation?

  8. Foundation Types: • Strip foundation • Pad foundation • Pile foundation • Raftfoundation

  9. Foundation Types:

  10. Shallow strip/trench foundations: • Used at a shallow depth • in good load bearing strata • to transfer long continuous loads • Width and depth of foundation will depend on the nature of ground and building loads

  11. Pad foundations: • Used under point loads such as columns • Can be used under ground beams to transfer continuous loads

  12. Raft foundation: • Spread the load over the whole building area • Reducing the point load • Used where buildings loads are high and/or ground conditions are poor

  13. Piled foundations: • Points loads of columns etc transferred to pile caps/ground beams onto the pile foundations • Down to a more suitable load bearing strata

  14. Piled Foundations: • Can be defined as a series of columns constructed or inserted into the ground to transmit the loads(s) of a structure to a lower level of subsoil. • Used when suitable foundation conditions are not present at or near ground level, making the use of deep traditional foundations uneconomic. • Points loads of columns etctransferred to pile caps/ground beams onto the pilefoundations. Down to a more suitable load bearing strata

  15. Piled Foundations: • Piles may be classified by: • their basic design: • OR • by their method of construction:

  16. Piled Foundations: Which is your coursework based on? Replacement

  17. Replacement/Bored Piles: • Replacement Piles are often called bored piles due to the removal of the spoil to form the hole for the pile is always carried out by a boring technique. • When boring through more unstable ground some form of casing or support is required, such as a bentoniteslurry. • Often used when close to existing buildings and where the allowable amount of noise and/or vibration is limited (insurance)

  18. Replacement/Bored Pile Types: • Bored Piles • Continuous Flight Augers • Secant Piles

  19. Displacement/Driven Piles: • Displacement Piles are often called driven piles since they are usually driven into the ground displacing the earth around the pile itself. • The pile or forming tube is driven into the required position to a predetermined depth. • Either preformed (concrete/steel) or partially preformed (pre cast concrete/insitu concrete/steel and insitu concrete) • Driven piles are either driven or jacked into the ground by a number of different methods: • Drop hammer • Diesel hammer • Vibration • Jacking

  20. Choice of pile: • Structures over water – driven piles • Driven cast in place - are usually cheapest for moderate building loads • Proximity of neighbouring buildings – bored piles • Heavy structures - bored/CFA piles are usually the most economical. • Ground conditions; • driven cannot be used economically in ground containing boulders • Bored would not be suitable in loose water bearing sand.

  21. CFA Piles: PLEASE WATCH THE FOLLOWING CLIP AND LIST THE ITEMS THAT YOU WOULD NEED TO COST? CFA Piling Demo http://www.youtube.com/watch?v=LNGAP0iZ8YU

  22. Recap of Assessment Take Off List • Extract from module guide: • Take off list for NRM1 Substructure (Group Component): • Piles, including: • piling mat • Plant • moving piling rig • disposal of excavated material associated with piling • breaking through obstructions • cutting off tops of pile • pile tests • Pile caps and ground beams • Lowest floor slab and associated details

  23. What and Where are the different forms of foundations measured in NRM1? Hand out NRM1 extract

  24. Different type of foundations NRM1 p.89:

  25. Piled foundations NRM1 Take Off listp.91-92:

  26. Different type of piled foundations NRM1 p.91:

  27. “Bulking”:

  28. Construction Risk (grd conditions, disposal):

  29. Foundations:

  30. Foundations: Level 1group element Level 2element

  31. Piled Foundations: Level 3sub element, Specialist foundations, Piled Foundation Level 4sub elements, Piling matts Piling plant Moving pile rig Piles Disposal of excavated material Extra for breaking through Cutting down piles Pile tests Pile caps Ground beams

  32. Piled Disposal Calculation:

  33. AS1 Report – Cost Plan Descriptions:

  34. How will you measure the quants and price: • Piling matt • Piling plant • Moving piling rig • Piles • Disposal of excavated material arising from piling • Extra for breaking through obstructions • Cutting off tops • Pile test • Pile caps • Ground beams Area of column x Length • Area x depth • Perimeter • m3 x kg/m3

  35. Pile take off:

  36. Pile cap take off:

  37. Demo’s; • Vibro Compacted Piling Demo http://www.youtube.com/watch?v=IPGAJCdVjUQ • Cassions

  38. Questions ? • LJMU Mission; “Our mission is to serve and enrich our students, clients and communities by providing opportunities for advancement through education, training, research and the transfer of knowledge” • LJMU Core Values; • Put the students and clients first • Committed to excellence • Respect and trust each other • Work as a team • Lead rather than follow and defend independence of thought • Recognise and celebrate success • Take work not ourselves seriously • DREAM, PLAN, ACHIEVE

  39. https://vimeo.com/38015108 CFA video • https://vimeo.com/38015109 • Driven video

  40. Summary • Identify various foundation options • Student activity, produce a piling take off list • Recap of assessment piling take off list • Evaluate NRM1 Substructure section and cost plan description build up • How to measure substructure quantities

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