摘要
基于重庆越江隧道掘进试验和模糊数学理论,对TBM掘进时盘形滚刀最优切深进行了动态模糊控制研究.对掘进时刀盘切割最低比能的实现途径进行了分析,提出了TBM掘进最优切深动态控制的理念,即根据地质条件的变化实时控制刀盘推力产生适度切深,以适应固定的刀间距,使刀间距与切深比值S/P处于最优范围内.现场采集掘进试验的数据,对其进行比能计算分析,得出泥岩和砂岩地层下刀盘的最优S/P分别为4—6和7—10.由于地层的复杂性和多变性,最优S/P只能控制在一定的范围内.因此采用模糊控制理论,设计了单输入一单输出的模糊控制系统,根据容许的ΔS/P,反馈调整刀盘推力,使之保持在最优的范围内工作,不断产生最优切深.工程应用表明,该模型能较好地指导TBM操作,将盘形滚刀切深控制在最优范围内,获得了较快的掘进速率和良好的经济效益.
TBMs had been widely used recently in tunnel constructions in China. TBM Performance dealt with the machine characteristics and geological conditions. The effective performance would be obtained at the lowest specific energy （SE） of a TBM. Aiming at the target, two paths to the lowest SE were analyzed firstly in this paper, one was cutter spacing layout and the other was thrust force control. When the TBM was advancing, the cutter spacing was fixed, but the TBM driver could adjust thrust force to result ideal penetration according to the various geological conditions. So a concept of dynamic control of optimum penetration was put forward. Driving tests were conducted on the TBM at Chongqing Yangtze River TBM tunnel, based on which a fuzzy dynamic control model for the optimum penetration was developed. According to analysis of field driving data, the specific energy would be kept the lowest at the optimum ratio of spacing and penetration（S/P）. According to the analysis of testing data, the optimum S/P in mud stone and sand stone were in the range of 4-7 and 7-10 respectively. Meanwhile geological conditions were complicate and variable, the optimum S/P could only be kept in a range. It should be described appropriately by a qualitative language just as fuzzy mathematics. By means of fuzzy theory, a fuzzy control system of single input variable and single output variable was modeled. In the fuzzy system the acceptable AS/P was set firstly, then adjustment of the thrust force was feedback into the system and the S/P could be maintained in the optimum range. The fuzzy model had been used to had brought faster advance rate and good economic guide the TBM and control the S/P, and returns.
出处
《应用基础与工程科学学报》
EI
CSCD
2009年第3期412-420,共9页
Journal of Basic Science and Engineering
基金
中国博士后科学基金(No.20060400670)
