The design of drilled displacement system piles using the cavity expansion theory

IF 0.5 4区工程技术 Q4 ENGINEERING, GEOLOGICAL

Acta Geotechnica Slovenica Pub Date : 2018-12-01 DOI:10.18690/actageotechslov.15.2.81-91.2018

J. Stacho

{"title":"The design of drilled displacement system piles using the cavity expansion theory","authors":"J. Stacho","doi":"10.18690/actageotechslov.15.2.81-91.2018","DOIUrl":null,"url":null,"abstract":"Drilled Displacement System (DDS) piles are an innovative technology for pile foundations. These DDS piles are created by rotary drilling with a simultaneous full displacement of the soil in a horizontal direction. The optimal design of DDS piles can be obtained in sandy soils and fine-grained soils that allow for a horizontal displacement, which causes an increase in the shaft’s resistance. This article deals with the use of Cavity Expansion Theory (CET) for a complex analysis of DDS piles. This method makes it possible to take into account the impact of the technology in pile design. A general view of the CET is presented and is described step by step for the solution of the present problem. The results of the calculations are compared and analysed with the results of three instrumented static load tests. The analyses include a comparison of the load-settlement curve as well as the load distribution over the pile’s length, which was measured using strain gauges. The results of the analyses show very good agreement between the calculations and the measurements. The difference between the calculated and measured load-settlement curves did not exceed a 10% degree of accuracy. The possibilities for the future use of CET are also discussed. J. Stacho: The design of drilled displacement system piles using the cavity expansion theory","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":" ","pages":""},"PeriodicalIF":0.5000,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geotechnica Slovenica","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.18690/actageotechslov.15.2.81-91.2018","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}

引用次数: 3

Abstract

Drilled Displacement System (DDS) piles are an innovative technology for pile foundations. These DDS piles are created by rotary drilling with a simultaneous full displacement of the soil in a horizontal direction. The optimal design of DDS piles can be obtained in sandy soils and fine-grained soils that allow for a horizontal displacement, which causes an increase in the shaft’s resistance. This article deals with the use of Cavity Expansion Theory (CET) for a complex analysis of DDS piles. This method makes it possible to take into account the impact of the technology in pile design. A general view of the CET is presented and is described step by step for the solution of the present problem. The results of the calculations are compared and analysed with the results of three instrumented static load tests. The analyses include a comparison of the load-settlement curve as well as the load distribution over the pile’s length, which was measured using strain gauges. The results of the analyses show very good agreement between the calculations and the measurements. The difference between the calculated and measured load-settlement curves did not exceed a 10% degree of accuracy. The possibilities for the future use of CET are also discussed. J. Stacho: The design of drilled displacement system piles using the cavity expansion theory

查看原文本刊更多论文

采用孔扩理论设计钻孔位移体系桩

钻孔位移系统（DDS）桩是一种创新的桩基技术。这些DDS桩是通过旋转钻孔形成的，同时使土壤在水平方向上完全位移。DDS桩的最佳设计可以在砂土和细粒土中获得，允许水平位移，这会导致桩身阻力增加。本文利用空腔膨胀理论（CET）对DDS桩进行复杂分析。这种方法使得在桩的设计中能够考虑该技术的影响。提出了CET的一般观点，并对其进行了逐步描述，以解决当前问题。将计算结果与三次仪器静载荷试验的结果进行了比较和分析。分析包括荷载-沉降曲线的比较以及使用应变仪测量的桩长上的荷载分布。分析结果表明，计算结果与测量结果非常吻合。计算和测量的荷载-沉降曲线之间的差异不超过10%的准确度。还讨论了今后使用CET的可能性。J.Stacho：利用空腔膨胀理论设计钻孔位移系统桩

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Acta Geotechnica Slovenica 地学-工程：地质

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： ACTA GEOTECHNICA SLOVENICA aims to play an important role in publishing high-quality, theoretical papers from important and emerging areas that will have a lasting impact on fundamental and practical aspects of geomechanics and geotechnical engineering. ACTA GEOTECHNICA SLOVENICA publishes papers from the following areas: soil and rock mechanics, engineering geology, environmental geotechnics, geosynthetic, geotechnical structures, numerical and analytical methods, computer modelling, optimization of geotechnical structures, field and laboratory testing. The journal is published twice a year.