...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The HKIE Transactions >An assessment of in-situ rock stress ratio in Hong Kong
【24h】

An assessment of in-situ rock stress ratio in Hong Kong

机译：对香港原地岩石应力比的评估

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 provide design parameters for the five new Mass Transit Railway Corporation railway lines in Hong Kong, a total of 124 hydraulic fracturing tests were carried out to determine the magnitude and orientation of the in-situ rock stresses along the proposed tunnel alignment. The main objective of the in-situ rock stress measurements is to check that the stresses will not cause undue problems in tunnel excavation or support. This paper assesses the in-situ rock stress ratio based on the hydraulic fracturing tests conducted in 27 boreholes within Hong Kong. When the individual principal stress magnitudes were examined alone, it seems that they are considerably scattering at shallow depth without any unique relationship. However, if the first stress invariant is plotted against the principal stress of each test, a unique stress ratio (horizontal principal stress divided by vertical principal stress) with depth within a range of 1.4-2.5 is found. The finding of this ratio is important when analysing failure initiation of underground rock excavation in Hong Kong.
机译：为了为香港地下铁路公司的五条新铁路线提供设计参数，共进行了124次水力压裂试验，以确定沿拟建隧道路线的原地岩石应力的大小和方向。现场岩石应力测量的主要目的是检查应力在隧道开挖或支护中不会引起不适当的问题。本文根据在香港27个钻孔中进行的水力压裂测试，评估了现场岩石应力比。当单独检查各个主应力幅值时，似乎它们在浅深度有相当大的散射，没有任何独特的关系。但是，如果将第一个应力不变性相对于每个测试的主应力作图，则会发现深度在1.4-2.5范围内的唯一应力比（水平主应力除以垂直主应力）。在分析香港地下岩石开挖的失败起因时，找到该比率非常重要。

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