首页> 外文学位 >A comprehensive geotechnical and geological investigation of high horizontal stress in shallow soils of the upper Mississippi Embayment and its influence on pile capacity (Kentucky, Missouri).
【24h】

A comprehensive geotechnical and geological investigation of high horizontal stress in shallow soils of the upper Mississippi Embayment and its influence on pile capacity (Kentucky, Missouri).

机译:密西西比河上游上游浅层土壤中的高水平应力及其对桩容量的影响的综合岩土工程和地质调查(密苏里州肯塔基)。

获取原文
获取原文并翻译 | 示例

摘要

In conjunction with the Olmsted Locks and Dam project, one of the largest civil engineering projects currently under construction in the United States, a comprehensive pile testing program was performed. From these pile tests, a soil stratum known as the McNairy formation was discovered to have high in-situ horizontal stress. The study area is located in the geologically and seismotectonically complex area of the upper Mississippi Embayment. The backcalculation of K0, the ratio of horizontal effective stress to vertical effective stress (σh v), from static pile load tests defined the magnitude of horizontal effective stress in the range from 2 to greater than 10. The K0 profile was then verified by measurements with a self-boring pressuremeter. This study presents a new method for the estimation of K0 that utilizes shear wave velocity measurements made in the field by cross-hole testing and laboratory measurements using bender elements. The method was successful, showing good agreement with K0 profiles determined from the pile load tests and self-boring pressuremeter. The source of the high in-situ stress is thought to be of tectonic origin and significant evidence to support this theory is presented.
机译:与Olmsted Locks and Dam项目(美国目前正在建设的最大的土木工程项目之一)一起,执行了一项全面的桩身测试计划。通过这些桩桩试验,发现了被称为McNairy地层的土壤地层具有较高的原位水平应力。研究区域位于密西西比河上游上层的地质和地震构造复杂区域。反算K 0 ,水平有效应力与垂直有效应力之比(σ' h ' v ),通过静态桩载荷测试将水平有效应力的大小定义为2到大于10。然后通过以下方法对K 0 轮廓进行测量:自钻孔压力计。这项研究提出了一种估计K 0 的新方法,该方法利用了通过跨孔测试和使用弯曲元件进行实验室测量而在现场进行的剪切波速度测量。该方法是成功的,与通过桩载荷测试和自钻孔压力计确定的K 0 曲线显示出良好的一致性。高地应力的来源被认为是构造起源,并提供了支持该理论的重要证据。

著录项

  • 作者

    Schaefer, Jeffrey Alan.;

  • 作者单位

    University of Kentucky.;

  • 授予单位 University of Kentucky.;
  • 学科 Engineering Civil.; Geotechnology.; Geology.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 149 p.
  • 总页数 149
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;地质学;地质学;
  • 关键词

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