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Talk · MATEC Web of Conferences · January 1, 2019

Evaluation of the quality of pile foundations by different methods

Askar Zhussupbekov, Ivan Morev, Gulzhanat Tanyrbergenova, Nurgul Shakirova

Askar Zhussupbekov
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Abstract

At the present time, in Astana city is going on works by construction public transport system LRT (Light Railway Transport). LRT is an overhead road with two railway lines. The first stage of construction is including construction of overhead road (bridge) with 22.4 km length and 18 stations. The foundation of bridge is the bored piles with cross-section of 1.0-1.5 m and length of 8-35 m. A design bearing capacity of pile is 4500-8000 kN. Chinese drilling rigs Zoomlion was used for soil boring without casing. A polymer slurry is used to maintain the walls of boreholes in sand and gravel soils. In these conditions very important point is the integrity of concrete body of each bored piles. For checking the integrity was used two methods – the Low Strain Method and the Cross-Hole Sonic Logging. The aim of this paper is finding the advantages and disadvantages of each method which applying on testing site.

Geotechnical Engineering and Soil MechanicsStructural Engineering and Materials AnalysisCivil and Structural Engineering Researchbored pilespile integrity testingcross-hole sonic logging

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