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Design of Pile Foundation Using Pile Load Test (Eurocode 7)
What we know about #secantpiles is that we thank you for rearranging the content from our website: https://lnkd.in/dB79_Bfk The original video is from #keller Foundations with a yellow box covering their logo.
Civil Engineering & Real Estate Consultancy
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What do you know about Secant/Tangent Piles? 𝐒𝐞𝐜𝐚𝐧𝐭 𝐏𝐢𝐥𝐞𝐬: Secant Piles walls are formed by constructing intersecting reinforced concrete piles. Secant pile walls are reinforced with either steel rebar or with steel beams and are constructed by drilling under mud. Primary secant piles are installed first with secondary reinforced secant piles constructed in between primary piles once the latter gain sufficient strength. Pile overlap is typically in the order of 3 inches (8 cm). In a tangent pile wall, there is no pile overlap as the piles are constructed flush to each other. Advantages: 1. Increased construction alignment flexibility. 2. Increased secant pile wall stiffness compared to sheet piles. 3. Can be installed in difficult ground (cobbles/boulders). 4. Less noisy construction. 5. No need to install timber lagging. Disadvantages: 1. Verticality tolerances may be hard to achieve for deep piles. 2. Total waterproofing is very difficult to obtain in joints. 3. Increased cost compared to sheet pile walls. Selecting the appropriate secant pile wall depends mostly on local practice, material, and installation costs. 𝐓𝐚𝐧𝐠𝐞𝐧𝐭 𝐩𝐢𝐥𝐞𝐬: Tangent piles walls, in contrast to secant pile walls do not interesect. As a result, all tangent piles need to be reinforced. With tangent pile walls, it is common to create a pile cap so that a more homogenous behavior can be achieved. Advantages: 1. Increased construction alignment flexibility. 2. Increased wall stiffness compared to sheet piles. 3. Can be installed in difficult ground (cobbles/boulders). 4. Less noisy construction. 5. No need to install timber lagging. 6. No need to create an overlap as required with secant piles. Disadvantages: 1. Verticality tolerances may be hard to achieve for deep piles. 2. Walls are not waterproof 3. Tangent piles cannot share load with adjacent pile 4. Soil must be able to span in between any small openings between the piles. As a result tangent piles are not recommended for cohesionless sand soils. #construction #civilengineering #piles
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