复合式土压平衡盾构盘形滚刀布置规律  

Disc cutter layout law for composite EPB shield

作　　者：夏毅敏[1] 林赉贶[1] 罗德志 卞章括[1] 吴元[1] 沈斌[1] 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [2]广州中望龙腾软件股份有限公司,广东广州510635

出　　处：《中南大学学报（自然科学版）》2013年第9期3652-3657,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51074180);国家重点基础研究发展规划("973"计划)项目(2007CB714002);湖南省科技重大专项(2010FJ1002);长沙市科技重大专项(K1003149-11)

摘　　要：根据目前常见复合式土压平衡盾构的结构特性,以刀盘开口特征为依据,对复合式土压平衡盾构进行分类并归纳出2种类型滚刀布置区域,建立其约束模型。通过分析盾构掘进时滚刀的受力情况,提出滚刀布置基本原则,在此基础上建立以滚刀极径与极角为设计变量的非线性多目标滚刀布置优化模型,分析模型的目标函数与约束条件,给出模型求解策略,并采用遗传算法求解得到滚刀布置参数。应用该优化设计方法对深圳地铁某施工标段所用盾构滚刀进行布置优化。研究结果表明:优化后刀盘的径向不平衡力下降10.1%,倾覆力矩下降9.4%,破岩量方差下降15.9%,表明所建立的数学模型及所使用的优化算法是正确、可行的。In terms of the structure performances of current composite earth pressure balance(EPB) shields,based on cutterhead's opening characteristics,the composite EPB Shields were categorised and two kinds of disc cutter layout region were summarized,and the constrained model was built.After analyzing the force conditions during excavating,according to the fundamental disc cutter layout principles,a nonlinear multi-objectives disc cutter layout optimization model was built taking the polar radius and polar angle of disc cutter as the design variables.Through the analysis of the objectives and constraints of the optimization model,a solving strategy was provided and solution was obtained by the genetic algorithm method.The optimal design method was applied to the cutterhead' layout used in a subway line construction of Shenzhen.The results show that the optimized cutterhead's radial unbalanced force is reduced by 10.1%,the upsetting moment is reduced by 9.4% and the variance of rock penetration rate is reduced by 15.9%,which means that the mathematic model and the optimization algorithm method are applicable and feasible.

关 键 词：复合式土压平衡盾构 滚刀布置 滚刀布置优化模型 遗传算法 

分 类 号：U455.39[建筑科学—桥梁与隧道工程]