CAJ | 학술논문

针对盾构密封舱压力系统缺乏机理模型，无法实现快速准确地压力控制问题，在密封舱压力控制机理分析基础上建立了密封舱压力动态平衡的数学模型。采用离散元法对密封舱压力场进行仿真，研究刀盘开口率、埋深等因素对密封舱压力传递关系的影响，分析了密封舱隔板压力与测点压力的映射关系，定义了密封舱压力传递系数，并在此基础上提出了密封舱压力控制的参考压力值设定过程。考虑密封舱压力系统机理模型的非线性与时变特点，提出密封舱压力的双变量最优控制策略。基于土压平衡盾构密封舱压力控制试验台对所提控制方法进行试验验证，研究结果表明：控制精度与速度均能满足适应地质变化的密封舱压力系统控制要求。
침대순구밀봉창압력계통결핍궤리모형，무법실현쾌속준학지압력공제문제，재밀봉창압력공제궤리분석기출상건립료밀봉창압력동태평형적수학모형。채용리산원법대밀봉창압력장진행방진，연구도반개구솔、매심등인소대밀봉창압력전체관계적영향，분석료밀봉창격판압력여측점압력적영사관계，정의료밀봉창압력전체계수，병재차기출상제출료밀봉창압력공제적삼고압력치설정과정。고필밀봉창압력계통궤리모형적비선성여시변특점，제출밀봉창압력적쌍변량최우공제책략。기우토압평형순구밀봉창압력공제시험태대소제공제방법진행시험험증，연구결과표명：공제정도여속도균능만족괄응지질변화적밀봉창압력계통공제요구。
In view of the lack of the mechanism model lead to can’t to control the pressure of work chamber of shield machine, on the basis of mechanism analyzing of pressure control, the mathematical model of dynamic pressure balance is established. Through the analysis of pressure distribution in work chamber using the discrete element numerical simulation, the effect of cutter opening ratio and tunnel depth to the pressure transitive relation of work chamber is studied, and the mapping between average pressure on bulkhead and the pressure of measurement points is obtained. Pressure transfer coefficient is defined to describe the pressure transitive relation of work chamber, and a procedure of setting the reference value of pressure control based on pressure transfer coefficient is present. Considering the nonlinear and time-varying of mathematical model of pressure control system, a bivariate optimal control strategy of work chamber pressure is proposing. Pressure control simulation experimental results show that the control precision and speed of the proposed control method can realize the requirements of geology adaptability of pressure control.