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contributor authorPelecanos Loizos;Soga Kenichi;Elshafie Mohammed Z. E. B.;de Battista Nicholas;Kechavarzi Cedric;Gue Chang Ye;Ouyang Yue;Seo Hyung-Joon
date accessioned2019-02-26T07:59:22Z
date available2019-02-26T07:59:22Z
date issued2018
identifier other%28ASCE%29GT.1943-5606.0001843.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4250704
description abstractInstrumented pile tests are vital to establish the performance of a pile and validate the assumptions made during initial design. Conventional instrumentation includes vibrating wire strain gauges and extensometers to measure the change in strain or displacements within a pile. Although these strain and displacement gauges are very accurate, they only provide strain/displacement readings at discrete locations at which they are installed. It is therefore common to interpolate between two consecutive points to obtain values corresponding to the data gaps between points; in practice, these discrete instrumented points could be tens of meters apart, at depths corresponding to different soil layers, and hence simple interpolation between the measurement points remains questionable. The Brillouin optical time-domain reflectometry fiber optic strain sensing system is able to provide distributed strain sensing along the entire length of the cable, enabling the full strain profile to be measured during a maintained pile load test. The strain data can also be integrated to obtain the displacement profile. This paper presents three case studies which investigate the performance of three concrete bored piles in London using both conventional vibrating wire strain gauges and distributed fiber optic strain sensing during maintained pile load tests, which enable comparisons made between the two instrumentation systems. In addition, finite-element analyses show that the ability to measure the full strain profiles for each pile is highly advantageous in understanding the performance of the pile and in detecting any abnormalities in the pile behavior.
publisherAmerican Society of Civil Engineers
titleDistributed Fiber Optic Sensing of Axially Loaded Bored Piles
typeJournal Paper
journal volume144
journal issue3
journal titleJournal of Geotechnical and Geoenvironmental Engineering
identifier doi10.1061/(ASCE)GT.1943-5606.0001843
page4017122
treeJournal of Geotechnical and Geoenvironmental Engineering:;2018:;Volume ( 144 ):;issue: 003
contenttypeFulltext


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