基于小波奇异性与突变理论的地下厂房围岩稳定性评价  

Stability Evaluation of Underground Powerhouse Surrounding Rock Based on Wavelet Singularity and Catastrophe Theory

作　　者：张建伟[1] 暴振磊 赵瑜[1] 江琦[1] 曹克磊 

机构地区：[1]华北水利水电大学水利学院,河南郑州450045

出　　处：《水电能源科学》2015年第9期106-109,105,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51009066);河南省高等学校青年骨干教师计划项目(2012GGJS-101);河南省科技攻关项目(142102310122)

摘　　要：为提高地下厂房围岩稳定性判别的准确性,提出基于小波奇异性与突变理论的围岩稳定性评价方法。首先检测位移监测数据的小波奇异性,判断该测点是否存在突变点;若存在突变点再将围岩变形速率作为非线性动力模型的一系列特解,反演出非线性动力模型;最后运用突变理论,建立围岩变形速率的尖点突变模型,通过模型判别式的正负来判断围岩的稳定性。将该方法应用于泰安电站地下厂房,结果表明该水电站地下厂房围岩处于稳定状态,与数值仿真结果一致,可见该方法合理有效,可为同类工程提供参考。In order to improve the accuracy of stability analysis on surrounding rock of underground powerhouse, a novel evaluation method which is based on the wavelet singularity theory and the catastrophe theory is proposed. Firstly, the deformation monitoring data are analyzed by wavelet singularity detection to judge whether there are singular points at measured point or not. And then the rate of deformation would be considered as a series of special solution of the nonlinear dynamic model to inverse the nonlinear dynamic model. Finally, Using catastrophe theory, the cusp catastrophic model of surrounding rock deformation rate is established, and the stability of the surrounding rock is analyzed by the discriminate of the mode. According to the deformation monitoring data of Tai＇an underground powerhouse, the surrounding rock is stable, which is consistent with the numerical simulation. It shows that this method is reasonable and effective, which can provide a reference for similar projects.

关 键 词：地下厂房 围岩 小波奇异性理论 突变理论 安全评价 

分 类 号：TV31[水利工程—水工结构工程]