摘要
小湾水电站拱坝坝基岩体地应力高,节理裂隙发育,通过对坝肩开挖前的坝基超前变形、开挖后的卸荷回弹变形和大坝混凝土浇筑后的压缩变形的全过程监测,分析卸荷裂隙分布和张开位移量,定量分析了坝基卸荷岩体变形发展规律,为评价坝基岩体质量和调整坝基岩体力学设计参数以及坝基开挖设计和施工提供了科学依据,对类似工程有参考价值。
The foundation of Xiaowan arc clam has bad geological phenomena such as high ground stress and joint fissures. The whole deformation course monitoring such as advanced deformation before dam abutment excavation, rebound deformation after dam foundation excavation and compression deformation after concrete depositing has been introduced. This paper analyzed unloading crack distribution and opening, deformation rules about unloading rock mass of clam foundation quantification. This paper also provided scientific reference for estimating rock quality, adjusting rock mechanics design parameters of dam foundation and excavation design and execution of Xiaowan dam foundation. This paper was of great reference worth for similar project.
出处
《水力发电》
北大核心
2009年第9期42-45,共4页
Water Power
关键词
坝基岩体
卸荷变形
滑动测微计
多点位移计
小湾水电站
dam foundation rock mass
unloading deformation
sliding-deformeter
multiple position extensometers
Xiaowan Hydropower Station
