Initial Parameters for Bubble Cabin of Large Diameter Slurry Shield

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.