• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Geotechnical Special Publication no.129; Geo-Frontiers Conference; 20050124-26; Austin,TX(US) >Laboratory Modeling of Vibro-Driven Piles
【24h】

Laboratory Modeling of Vibro-Driven Piles

机译：振动桩的实验室建模

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To better understand the factors influencing the driveability and bearing capacity of vibro-driven piles, a large-scale laboratory study was performed. The testing system consisted of a pressure chamber to simulate in situ stresses, a 4-in.- (102-mm-) diameter instrumented displacement pile, a model vibratory driver, and a model impact hammer. The influence of soil and vibro-driver parameters, in situ stress conditions, and restriking with an impact hammer on the performance of vibro-driven pile was investigated. The soil parameters of interest were particle size (effective grain size of 0.2 mm and 1.2 mm) and relative density (65% and 90%). The vibratory-driver parameters of interest were the frequency, eccentric moment, and bias weight applied to the vibrator. Based on maximum rate of penetration of the pile, an optimum driver frequency of 20 Hz was observed for the vibro-driver-pile-soil system under investigation. The optimum driver frequency was not affected by the range of soil conditions, eccentric moment, and bias weight investigated. The relative density of soil has the greatest influence on the rate of penetration of vibro-driven piles. Static and dynamic unit-load-transfer relationships were developed for piles driven by vibration and compared with those obtained for piles driven by impact under similar conditions. Impact-driven piles developed higher capacity than vibro-driven piles in medium-dense sand (65% relative density), but the reverse was observed at 90% relative density, with vibro-driven piles having greater bearing capacity.
机译：为了更好地了解影响振动桩的可驱动性和承载力的因素，进行了大规模的实验室研究。该测试系统包括一个模拟原位应力的压力室，一个直径为4英寸（102毫米）的仪表化位移桩，一个模型振动起子和一个模型冲击锤。研究了土壤和振动驱动器参数，原地应力条件以及用冲击锤进行再冲击对振动驱动桩性能的影响。感兴趣的土壤参数是粒径（有效粒径为0.2 mm和1.2 mm）和相对密度（65％和90％）。感兴趣的振动驱动器参数是施加到振动器的频率，偏心矩和偏置重量。根据最大的桩穿透速度，观察到的振动驱动器-桩-土壤系统的最佳驱动器频率为20 Hz。最佳驱动器频率不受土壤条件范围，偏心矩和偏置重量的影响。土壤的相对密度对振动桩的渗透速度影响最大。对于振动驱动的桩，建立了静态和动态的单位荷载传递关系，并将其与相似条件下的冲击驱动的桩进行了比较。冲击驱动桩在中等密度的沙子（相对密度为65％）中比振动驱动桩具有更高的承载能力，但在90％相对密度下却观察到相反的情况，振动驱动桩具有更大的承载力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号