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首页> 外文会议>Annual highway geology symposium >PDA and Pile Restrike; A Better Understanding of Pile Resistances
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PDA and Pile Restrike; A Better Understanding of Pile Resistances

机译：PDA和打桩机;对桩阻力的更好理解

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摘要

As KDOT continues to move forward using Load and Resistance Factor Design (LRFD) the utilization of high-strain dynamic pile testing is a fundamental step in generating our geotechnical recommendations. By implementing a PDA (Pile Driving Analyzer) during high-strain testing KDOT geologists and engineers have more confidence in the recommended bearing resistances. The goal for KDOT is to better understand pile resistances in various geologic settings to aid in reducing costs, reduce pile sizes and increase the loads needed to meet LRFD standards. The current practice for PDA testing is to monitor piling to end of initial drive (EOID), and then perform short and long term restrikes. This current testing method has allowed KDOT geology to verify pile design resistances, and short and long term setup gains. Ultimately, KDOT anticipates establishing a new modifier for the ENR formula based upon data collected from PDA's and pile restrikes. KDOT will utilize that PDA and restrike data in the design phase of future projects, thus taking advantage of the soil setup, reducing pile sizes, increase design recommendations to measured pile capacities, eliminate pile overruns, and expedite pile installation.
机译：随着KDOT使用载荷和阻力因子设计（LRFD）不断向前发展，利用高应变动力桩测试是生成我们的岩土工程建议的基本步骤。通过在高应变测试期间实施PDA（打桩分析仪），KDOT地质学家和工程师对建议的轴承阻力有了更大的信心。 KDOT的目标是更好地了解各种地质环境中的桩阻力，以帮助降低成本，减小桩尺寸并增加满足LRFD标准所需的载荷。 PDA测试的当前做法是监视堆积到初始驱动器（EOID）的末端，然后执行短期和长期重新调整。当前的测试方法已使KDOT地质学能够验证桩的设计阻力以及短期和长期的安装增益。最终，KDOT期望基于从PDA和桩架产生的数据收集的数据，为ENR公式建立新的修改器。 KDOT将在未来项目的设计阶段利用PDA和Restrike数据，从而利用土壤设置，减小桩的尺寸，增加对测得桩容量的设计建议，消除桩超支并加快桩的安装。

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