...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Tunnelling and underground space technology >Triaxial creep tests and back analysis of time-dependent behavior of Siah Bisheh cavern by 3-Dimensional Distinct Element Method
【24h】

Triaxial creep tests and back analysis of time-dependent behavior of Siah Bisheh cavern by 3-Dimensional Distinct Element Method

机译：Siah Bisheh洞穴的三轴蠕变测试和时变行为的反分析（三维离散元方法）

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

Time dependent effects or creep behavior of rocks has great importance in further development of knowledge in the field of rock mechanics. An increase of pressure on support system due to creep behavior of rock is one of the most important issues in underground structure with weak surrounding rock mass. In this contribution a time-dependent behavior analysis of Siah Bisheh pumped storage powerhouse cavern with complex geometry being under construction on the Chalus River at the north of Iran were investigated. The cavern surrounded rocks containing Shale, Limestone, Sandstone and igneous rock in major parts is located in Alborz Structural Zone. The cavern is being built in a region that is highly prone to sheared and faulted zones. Therefore, it is essential to analyze and design underground structures to prevent any serious long-term damages in this region. The rock mass may exhibit continuous or discontinuous deformations due to excavation of large underground openings; therefore, deformation include shearing of joints and creep deformation of rock material. Because of the fractured and jointed rock mass, the Discrete Element method used to back analysis the time-dependent behavior of the Siah Bisheh cavern. In addition, triaxial creep tests were performed on rock specimens in order to estimate the time-dependent behavior of rock around the cavern. The creep tests and in situ measurements were employed to estimate parameters of power constitutive creep model being able to model the primary and secondary creep regions of rock masses implemented in the 3-Dimensional Distinct Element Code. Simulation results show good agreement with monitoring data. By excavating the lower stages of the cavern, some instantaneous deformation occurs in displacement-time curve of the crown.
机译：岩石的时变效应或蠕变行为在岩石力学领域的知识的进一步发展中非常重要。由于岩石的蠕变行为，对支撑系统的压力增加是具有较弱围岩质量的地下结构中最重要的问题之一。在这项贡献中，对伊朗北部查卢斯河上正在建造的具有复杂几何形状的Siah Bisheh抽水蓄能电站洞穴进行了时变行为分析。洞穴包围的岩石主要位于页岩，石灰石，砂岩和火成岩中，位于阿尔伯兹构造区。洞穴建在一个高度容易发生剪切和断裂的区域。因此，分析和设计地下结构以防止对该区域造成任何严重的长期破坏至关重要。由于开挖大的地下洞口，岩体可能会出现连续或不连续的变形。因此，变形包括节理的剪切和岩石材料的蠕变。由于裂隙和节理的岩体，离散元素方法用于对Siah Bisheh洞穴的时变行为进行反分析。另外，对岩石样品进行了三轴蠕变试验，以估计洞穴周围岩石随时间的变化。蠕变测试和原位测量被用来估算幂本构蠕变模型的参数，该模型能够对三维独特单元代码中实现的岩体的初级和次级蠕变区域进行建模。仿真结果与监测数据吻合良好。通过挖掘洞穴的下段，在冠的位移-时间曲线中会发生一些瞬时变形。

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