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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 .
In this paper, a comprehensive introduction to the 3D geomechanical model test of the cavern group in the underground powerhouse of the proposed super-large hydropower station is given, including solving the complex three-dimensional initial stress field simulation problem by adopting a discretized multi-stress plane loading and control system; And stepping micro boring machine technology, miniature high-precision displacement measuring technology, sonic testing technology, optical fiber measurement and endoscopic photography technology to solve the three-dimensional test of hidden excavation simulation and internal measurement and other key technical issues.Experimental results It shows that the overall arrangement, cavity design and spacing of the caverns in the underground powerhouse of the proposed hydropower station are reasonable. The proposed support scheme has a significant effect on the overall strengthening of the cavern and has strong support for the design scheme Verify the role.