大型泥水平衡盾构气泡舱初始参数的设计

Initial Parameters for Bubble Cabin of Large Diameter Slurry Shield

摘要:

首次从吸收脉动压力的角度，建立了大型泥水平衡盾构气泡舱的气压弹簧数学模型，并在此模型的基础上对该气泡舱进行了动态分析，其中详细分析并确定了对泥水平衡盾构开挖面平衡控制起关键作用的气泡舱的初始泥水液位、压缩空气的初始体积、初始压力等初始参数的确定原则、计算公式以及最佳取值范围，为此类盾构的泥水气压平衡控制系统的设计提供了理论依据，最终得出的“气泡舱的初始泥水液位应维持在盾构中心轴线处”的结论与实际施工结果相一致.

Abstract:

An analysis is first made of the dynamic behavior of the large diameter slurry shield’s bubble cabin.Based on the mathematical model of gas-pressure spring according to the effect of pulsating pressure,formula to calculate the parameters such as the initial volume and initial pressure of the gases in the bubble cabin which is the key factor to the excavating face-pressure-balanced control system is achieved,and the range of these parameters is also discussed,which is the basis of the control-system design.The ultimate conclusion,initial mud level in the bubble cabin should be maintained at the shield central axis,is consistent with the actual construction.