• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>UMN annual geotechnical engineering conference >Construction projects requiring rock socket construction in Precambrian age rock
【24h】

Construction projects requiring rock socket construction in Precambrian age rock

机译：需要岩石套接字建设的建设项目在普雷亚姆郡

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two construction projects involving rock socket construction in Precambrian rock were completed in the western portion of Michigan's Upper Peninsula. The first project involved rock sockets drilled into the Vulcan Iron-Formation, while the second project involved construction in the Michigamme Formation, a metamorphic slate-graywacke sequence. Lessons learned include the following. Precambrian rock tends to have high strength. Core that fractures during the drilling operation might indicate high horizontal or residual stresses existing in the rock. It's important that the rock's unconfined compressive strength be determined even if significant fracturing occurs during drilling operations. When mechanical strength data indicates a wide range of rock strengths, the higher strength rock should in most cases dictate the choice of drilling equipment not the average value. And finally, dipping rock layers can cause difficult drilling operations for downhole hammers when drilling through weak and strong rock layers.
机译：在密歇根州的上半岛西部完成了涉及岩石套接字建设的两个建筑项目。第一个项目涉及岩石插座钻入硫磺铸铁形成，而第二个项目涉及在Michigamme形成的施工，变质板岩灰度序列。经验教训包括以下内容。普雷明岩石往往具有高强度。钻井过程中裂缝的核心可能表示岩石中存在的高水平或残余应力。重要的是，即使在钻井操作期间发生显着的压裂，也必须确定岩石的不连续的抗压强度。当机械强度数据表明各种岩石强度时，大多数情况下，较高的强度岩石应决定钻井设备的选择而不是平均值。最后，浸渍岩层可以通过弱和强岩层钻孔时对井下锤造成艰难的钻孔操作。

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