Evaluation of Compression Interpretation Criteria for Drilled Shafts Socketed into Rocks

IF 2 4区工程技术 Q3 ENGINEERING, GEOLOGICAL

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering Pub Date : 2022-05-03 DOI:10.1680/jgeen.21.00120

Anjerick Topacio, Yit-Jin Chen, K. Phoon, Chong Tang

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引用次数: 3

Abstract

Representative compression interpretation criteria were analysed in this study to assess their relative merits and interrelationships when applied to drilled shafts socketed into rocks. Results of load tests around the world were gathered and collated into a database CYCU/RockSocket/50 for the assessment. Each of the applied interpretation criteria was then evaluated and compared with one another and with the results of the interpretations of drilled shafts in varying soil conditions and post-grouted drilled shafts. To further assess the behaviour of drilled shafts socketed into rocks, interpreted side and end bearing resistances were also determined. The mean interpreted capacities and displacements were higher for drilled shafts socketed into rocks when compared to drilled shafts in soils, but are at comparable ranges with tip post-grouted drilled shafts. On this basis, recommendations regarding specific interpretation criteria, which are advantageous for design displacement requirements under 12 mm for serviceability and displacements on the range of 53 mm to 71 mm for ultimate limit states, were established. Finally, behavioural assessments of the normalized load-displacement curves were extensively done using hyperbolic equations to test their effectivity to CYCU/RockSocket/50.

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嵌岩钻井压缩解释标准评价

本研究分析了代表性的压缩解释标准，以评估它们在应用于嵌入岩石的钻孔井时的相对优点和相互关系。收集并整理了世界各地负载测试的结果，建立了CYCU/RockSocket/50数据库，以供评估。然后对每个应用的解释标准进行了评估和比较，并与不同土壤条件下的钻孔井和后灌浆钻孔井的解释结果进行了比较。为了进一步评估嵌入岩石的钻孔井的行为，还确定了解释侧和端轴承阻力。与土壤中的钻孔井相比，嵌入岩石中的钻孔井的平均解释能力和位移更高，但与尖端后注浆的钻孔井的范围相当。在此基础上，建立了关于具体解释标准的建议，这些标准有利于12毫米以下的设计位移要求的可用性和53毫米至71毫米的最终极限状态的位移要求。最后，使用双曲方程对归一化荷载-位移曲线进行了行为评估，以测试其对CYCU/RockSocket/50的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Civil Engineers-Geotechnical Engineering 工程技术-地球科学综合

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

3 months

期刊介绍： Geotechnical Engineering provides a forum for the publication of high quality, topical and relevant technical papers covering all aspects of geotechnical research, design, construction and performance. The journal aims to be of interest to those civil, structural or geotechnical engineering practitioners wishing to develop a greater understanding of the influence of geotechnics on the built environment.