Optimal arrangement for pressure measurement points in working chamber of earth pressure balance shield  

作　　者：刘畅 屈福政 李守巨 孟庆琳 

机构地区：[1]School of Mechanical Engineering,Dalian University of Technology [2]State Key Laboratory of Structural Analysis of Industrial Equipment(Dalian University of Technology)

出　　处：《Journal of Central South University》2012年第7期1883-1891,共9页中南大学学报（英文版）

基　　金：Project(2007CB714006) supported by the National Basic Research Program of China

摘　　要：In order to exactly provide scientific basis for pressure dynamic balance control of working chamber of earth pressure balance shield (EPBS),study on optimal arrangement of pressure measurement points in working chamber was conducted. Based on mathematical description of optimal arrangement for pressure measurement points,fuzzy clustering analysis and discriminant analysis were used to divide pressure regions of nodes on bulkhead. Finally,the selection method of optimal measurement points was proposed,and by selecting d6.28 m EPBS as study object,the case study was conducted. By contrast,based on optimal arrangement scheme of pressure measurement points,through adopting weighted algorithm,the absolute error mean of equivalent pressure of working chamber is the smallest. In addition,pressure curve of optimal arrangement points presents parabola,and it can show the state of pressure distribution on bulkhead truly. It is concluded that the optimal arrangement method of pressure measurement points in working chamber is effective and feasible,and the method can provide basis for realizing high precision pressure control of EPBS.In order to exactly provide scientific basis for pressure dynamic balance control of working chamber of earth pressure balance shield （EPBS）, study on optimal arrangement of pressure measurement points in working chamber was conducted. Based on mathematical description of optimal arrangement for pressure measurement points, fuzzy clustering analysis and discriminant analysis were used to divide pressure regions of nodes on bulkhead. Finally, the selection method of optimal measurement points was proposed, and by selecting d6.28 m EPBS as study object, the case study was conducted. By contrast, based on optimal arrangement scheme of pressure measurement points, through adopting weighted algorithm, the absolute error mean of equivalent pressure of working chamber is the smallest. In addition, pressure curve of optimal arrangement points presents parabola, and it can show the state of pressure distribution on bulkhead truly. It is concluded that the optimal arrangement method of pressure measurement points in working chamber is effective and feasible, and the method can provide basis for realizing high precision pressure control of EPBS.

关 键 词：TUNNELING earth pressure balance shield working chamber optimal arrangement discrete element method 

分 类 号：U455.3[建筑科学—桥梁与隧道工程]