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  2. Pile driver - Wikipedia

    en.wikipedia.org/wiki/Pile_driver

    Vibratory pile hammers contain a system of counter-rotating eccentric weights, powered by hydraulic motors, and designed so that horizontal vibrations cancel out, while vertical vibrations are transmitted into the pile. The pile driving machine positioned over the pile with an excavator or crane, and is fastened to the pile by a clamp and/or bolts.

  3. Piling - Wikipedia

    en.wikipedia.org/wiki/Piling

    Splicing timber piles is still quite common and is the easiest of all the piling materials to splice. The normal method for splicing is by driving the leader pile first, driving a steel tube (normally 60–100 cm long, with an internal diameter no smaller than the minimum toe diameter) half its length onto the end of the leader pile.

  4. Franki piling system - Wikipedia

    en.wikipedia.org/wiki/Franki_Piling_System

    Franki piles can be installed raked (or sloped) with a tilt of up to 4:1. [5] Raked Franki piles are always reinforced and are particularly suitable for structures subject to dynamic forces. [1] Driving methods such as open-ended coring, rock socketing, and composite shaft construction are occasionally used to overcome unique site problems. [3]

  5. Wave equation analysis - Wikipedia

    en.wikipedia.org/wiki/Wave_equation_analysis

    The model mathematically represents the pile driving hammer and all its accessories (ram, cap, and cap block), as well as the pile, as a series of lumped masses and springs in a one-dimensional analysis. The soil response for each pile segment is modeled as viscoelastic-plastic. The method was first developed in the 1950s by E.A. Smith of the ...

  6. High strain dynamic testing - Wikipedia

    en.wikipedia.org/wiki/High_strain_dynamic_testing

    These sensors are connected to an instrument (such as a pile driving analyzer), that records, processes and displays data and results. As long as the wave travels in one direction, force and velocity are proportional and related by the expression F = Zv, where: Z = EA/c is the pile impedance; E is the pile material modulus of elasticity

  7. Screw piles - Wikipedia

    en.wikipedia.org/wiki/Screw_piles

    Screw piles are typically manufactured from high-strength steel [1] using varying sizes of tubular hollow sections with helical flights. The pile shaft transfers a structure's load into the pile. Helical steel plates are welded to the pile shaft to suit the site specific ground conditions. Helices can be press-formed to a specified pitch or ...

  8. Roman bridge - Wikipedia

    en.wikipedia.org/wiki/Roman_bridge

    Other early techniques used to build wooden bridges involved barges, sometimes they were moored side by side. Workmen would raise weights, sometimes by rope, then it would fall down onto the piles. This method of construction, called pile driving, was necessary for wooden bridges to properly

  9. Driven to refusal - Wikipedia

    en.wikipedia.org/wiki/Driven_to_refusal

    This is an engineering term for describing how far to drive piles. [1] It is also used in surveying when driving metal posts and monuments that are to be used as bench marks (ie. the elevation of which will be established to a high degree of accuracy). When a very high degree of stability is required the post will be inside an oil filled outer ...