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Geological dependence of resistance factors for deep foundation design.

机译：深层基础设计中阻力因素的地质依赖性。

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摘要

This research addresses the issue of geological dependence of deep foundation designs resistance factors for driven pile and drilled shaft designs in different locations. For the proof, two sets of databases were used: one from the NCHRP 507 report and another driven pile and drilled shaft database with static load tests and soil profiles from the different locations in Vietnam were used to evaluate resistance factor design for different axial pile capacity prediction methods. Eight different static analysis methods were used for driven pile capacity evaluation: α-Tomlinson, α-API, λ, β, Nordlund, Thurman, Meyerhof SPT, and the Shmertmann SPT method. For drilled shafts the FHWA and Reese & Wight methods were used. In the analyses the correlations between Nspt and soil parameters were used. First Order Second Moment (FOSM), First Order Reliability Methods (FORM) and Monte Carlo simulations were used to evaluate the based analyses in the determination of the resistance factors. The following notable benefits were attained in this project: 1) Resistance factors are made available for the LRFD designs of driven piles and drilled shafts in Vietnam; 2) The results show that the resistance factors vary with methods, geomaterial types and geological locations; 3) The found resistance factors for Vietnam give substantially greater factored capacities as compared to the 2012 AASHTO-LRFD recommendations.
机译：这项研究解决了深层基础设计阻力因素在不同位置对打入桩和钻孔竖井设计的地质依赖性问题。为了证明这一点，使用了两组数据库：一组来自NCHRP 507报告，另一组是从越南不同位置进行静载荷测试和土壤剖面的打桩和钻探竖井数据库，以评估不同轴向桩容量的阻力系数设计预测方法。八种不同的静态分析方法用于打桩能力评估：α-Tomlinson，α-API，λ，β，Nordlund，Thurman，Meyerhof SPT和Shmertmann SPT方法。对于钻孔轴，使用了FHWA和Reese＆Wight方法。在分析中，使用了Nspt和土壤参数之间的相关性。一阶第二矩（FOSM），一阶可靠性方法（FORM）和蒙特卡洛模拟用于评估确定阻力因素时的基础分析。该项目获得了以下显着的好处：1）在越南，为驱动桩和钻杆的LRFD设计提供了阻力系数； 2）结果表明，抵抗力因方法，岩土材料类型和地理位置而异。 3）与2012年AASHTO-LRFD建议相比，越南发现的抵抗力因子提供了更大的因子分解能力。

著录项

  • 作者

    Vu, Cuong.;

  • 作者单位

    University of Colorado at Denver.;

  • 授予单位 University of Colorado at Denver.;
  • 学科 Engineering Geological.;Engineering Civil.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 455 p.
  • 总页数 455
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 石油、天然气工业;
  • 关键词

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