摘要
现有的盾构土压平衡控制系统中,通常通过控制螺旋输送机的转速改变渣土输出流量实现对密封舱压力的控制。为克服螺旋输送机理论计算渣土流量与实际输出流量存在的偏差对密封舱压力精确控制产生的影响,在现有盾构土压平衡控制系统的基础上,在输送渣土的皮带机上安装皮带秤,以准确实时测得螺旋输送机的瞬时渣土输出流量作为反馈信号构成螺旋输送机转速的控制闭环,并与密封舱压力的反馈信号构成盾构土压平衡双闭环控制系统。通过仿真分析和现场试验验证了所建立控制系统的有效性。
In the existing earth pressure balance control system, the pressure control of capsule is commonly achieved by chan- ging the revolving speed of screw conveyer. To overcome the negative influences of the offset between theoretical calculation of sediment flow and actual output flow of screw conveyer on the precision pressure control of capsule, the existing earth pressure balance control system is improve by installing a belt weigher on belt conveyer to achieve real- time measurement of the muck output flow of screw conveyer. The feedback of muck output flow and the capsule pressure feedback signal con- stitute a double closed loop control of the earth pressure bal- ance control system. Simulations and field tests have verified the effectiveness of the proposed method.
出处
《城市轨道交通研究》
北大核心
2017年第1期58-60,74,共4页
Urban Mass Transit
关键词
盾构掘进机
土压平衡控制
密封舱压力
渣土输出流量反馈
shield tunneling machine
earth pressure balance control
earth pressure in capsule
feedback of muck output flow
