水电站洞群模型试验中位移量测方法的研究  

Study on displacement measurement methods in geomechanical model testing of an underground cavern group for hydropower station

作　　者：张乾兵[1] 朱维申[1] 孙林锋[1] 张磊[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《水利学报》2010年第9期1087-1093,共7页Journal of Hydraulic Engineering

基　　金：国家自然科学基金重点资助项目(90510019)

摘　　要：本文以双江口水电站洞群的大型三维模型试验为研究对象,为解决洞周围岩和边墙关键点微小位移的量测问题,在试验开挖过程中采用了数字照相变形量测技术和基于光纤布拉格光栅(FBG)的特殊棒式位移传感器,并研制了以高精度光栅尺为传感器的微型多点位移计监测做记录。经计算分析后,可获得洞室在加载与开挖过程中的洞室围岩和边墙关键点位移的变化过程与规律曲线。研究表明,本文提出的多种在洞周围岩和边墙关键点位移量测方法取得了良好的效果。Taking the Shuangjiangkou Hydropower Station as a prototype, geomechanical model test was conducted to investigate the stability of an underground cavern group. To measure small displacements in the surrounding rock masses, a digital photogrammetric technique, displacement sensing bars using Fiber Bragg Grating （FBG） technology, and mini multi-point extensometers with high-precision grating scales were developed for measuring deformation. The variation process and curves of the law of displacements in the surrounding rock masses and at key points in the side walls can be obtained. The results show that the research and application of displacement measurement methods used in the geomechanical model test have achieved statisfactory results.

关 键 词：地下洞群 地质力学模型试验 位移量测 

分 类 号：TU923[建筑科学—建筑设计及理论]