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Analysis of Screw Piles1ANALYSIS OF SCREW PILESAn Analysis Paper on Screw Piles ByStudent’s NameName of the ProfessorInstitutional AffiliationCity/StateYear/Month/Day
Analysis of Screw Piles2INTRODUCTIONThis research paper focuses on the analysis of axially loaded screw piles. The first sectionof screw piles analysis is the background information of the crew piles, then the introduction ofthe screw piles and then the historical perspectives of the screw piles and their implications. Themethods of designing screw piles include bearing capacity, cylindrical shear model, and axialcapacity methods. The axial piles that are vertically loaded in tension and compression in bothcohesionless soils and cohesion form the primary of the analysis of the screw piles.Figure 1: Screw Pile Elements[CITATION MAh16 \p 187 \l 1033 ]The traditional piles differ from the screw piles since the screw piles are made of steel ofhigh strength composed of helices that are fixed on the shaft at a definite spacing and possess atoe that is pointy to enable enhanced installation into the surface. The crew piles were originallyutilized in anchoring and therefore were located at the centre around loads of tensile force likeburied pipelines and transmission towers. The crew piles provide tensile structural resistance,lateral forces, and compression. The context surrounding the use of crew piles as structure’sfoundation has involved numerous trends.
Analysis of Screw Piles3The disadvantages and advantages of crew piles are critical in the determination of theconditions under which they are most suitable and important compared to other customarymethods of piling. Some of the advantages of crew piles include ease in installation, reusability,removability, suitable for regions with restricted access, and quick installation where loaded canfollow soon. Despite the advantages above, the screw piles are faced with numerousdisadvantages such as the assertion of disadvantageous conditions of the soil for the screw pileslike boulders, bedrocks, and rocky soils. However, these drawbacks can be mitigated by the useof surface with a sharp toe when rocks that are weak are met to improve the rock passage.The process of installation of the crew piles is understood to have an effect of the design.The normal procedure entails advancing the screw piles into the soil through the use of motor ofhydraulic torque which consequences in the penetration of the helices in the soil throughrotations by the application of a moment of turning at the head of the shaft. When the pitch ofevery helix is similar, this enables further installations since every succeeding helix follows thesimilar trail as the one previously. The installation of crew piles entails torque application andalso the downward pressure application which is commonly known as the crowd.Numerous methods of design related to the crew piles have been researched on and themajority have proved to be successful. These design methods include the relationship betweenthe bearing capacity and the torque of installation, the method of individual bearing, and methodof cylindrical shear. The method of cylindrical shear enables for the approximation of the screwpile’s axial capabilities. The common properties and parameters utilized in the determination ofthe bearing capabilities include the following[CITATION NPK12 \p 174 \l 1033 ]