Discovering the Main Causes of Tunnel Lining Damage Based on Correspondence Analysis Model
Chen Fengbin · Zhongguo tiedao kexue · 2012
The method for discovering the main causes of tunnel lining damage was put forward based on correspondence analysis model.Contingency table of tunnel lining damage correspondence analysis model was established according to tunnel lining damage samples and cause survey data.Combined with factor analysis,the relation between R type factor analysis and Q type factor analysis in the correspondence analysis model was established.The convergence of the correspondence analysis model was calculated and was also optimized by an excluding special point method.The tunnel lining damage sample points and cause points were listed in a two-dimensional correspondence analysis diagram.The main causes of tunnel lining damage could be judged based on both corresponding position relation in the diagram.According to the collected lining damage data of eighteen tunnels,SPSS software was used to discover the main causes based on the proposed main causes discovering method for tunnel lining damage.Analysis results show that the main causes for sample tunnel lining damage are cavities behind the lining,insufficient lining thickness,misconduct of the surrounding rock and plastic ground pressure.