大型地下水电站厂房洞群三维地质力学模型试验

本文对拟建的超大型水电站地下厂房洞室群三维地质力学模型试验作了综合介绍，包括采用离散化多主应力面加载和控制系统，解决了复杂三维初始应力场的模拟难题；采用机械臂和步进微型掘进机技术、微型高精度位移量测技术、声波测试技术、光纤测量及内窥摄影技术等，解决了三维试验中的隐蔽开挖模拟及内部量测等关键技术问题。试验结果表明拟建水电站地下厂房洞室群的总体布置、洞型设计、洞室间距是合理的，推荐的支护方案对洞室整体性的加强有明显的作用，对设计方案起到有力的支持和验证作用。

3-D geo-mechanical model test for large scaled underground hydropower station

The newly developed techniques for geo-mechanical model test are introduced. The techniques include:discrete finite principle stress surface loading and monitoring system for generation of modeled initial stress field; micro TBM for modeling the excavation of cavern in rock mass; high accuracy micro multi-point extensometer; acoustic instrument testing facility; fiber sensor and peed-in photographic technology. By adopting these new techniques the large-scale model test for a huge underground hydropower house was successfully implemented and satisfactory result was attained.