考虑参数影响的系统分析方法及其应用

以琅琊山实际工程地下厂房的结构型式为背景,选取对地下洞室稳定性影响较为重要的四参数,即:岩体变形模量、洞室埋深、主厂房高度、侧压力系数,进行大量的弹塑性数值模拟分析。试图通过回归分析的数学方法,分析围岩关键点位移规律,建立预测模型。最后应用预测方法,对位移进行参数敏感性分析;预测位移结果与现场测试结果有较好的一致性。

Systematic analysis method based on some parameters in underground chambers and its application

Based on the underground structure scheme of Langyashan hydro-electrical project, lots of elastic-plastic numerical analysis was conducted considering modulus of deformation, layout depth of underground opening, height of main factory and coefficient of lateral pressure as the mainly mechanical parameters that influenced the stability analysis of underground caverns. The statisticsal method was employed to investigate the variation of displacement of surrounding house and the forecast model was found. Then the forecast model was used to analyze the sensitivity parameters. It was shown that there was good agreement between theoretical result and monitored result.