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METHOD AND APPARATUS FOR EVALUATING PLASTIC FLUIDITY OF EXCAVATED SOIL IN CHAMBER IN EARTH PRESSURE BALANCED SHIELD METHOD, AND EARTH PRESSURE BALANCED SHIELD EXCAVATOR
METHOD AND APPARATUS FOR EVALUATING PLASTIC FLUIDITY OF EXCAVATED SOIL IN CHAMBER IN EARTH PRESSURE BALANCED SHIELD METHOD, AND EARTH PRESSURE BALANCED SHIELD EXCAVATOR
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机译：土压平衡式盾构法评估室中开挖土壤塑性流动的方法和装置及土压平衡式盾构挖土机
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摘要
PROBLEM TO BE SOLVED: To provide a method and apparatus for evaluating plastic fluidity of excavated soil in a chamber in an earth pressure balanced shield method in which an analysis method enabling the analysis to be stably performed even if an analysis target is a largely deforming fluid having high viscosity such as the excavated soil is employed, and provide an earth pressure balanced shield excavator.SOLUTION: A method for evaluating plastic fluidity of excavated soil in a chamber in an earth pressure balanced shield method comprises the steps of: expressing the excavated soil as collection of particles and assuming an analysis target of a particle method for analyzing the movement of this particles by calculation, alternatively, approximating a shape in a chamber for stirring the excavated soil by polyhedrons and assuming the surface for forming this polyhedrons as a rigid body by a wall distributing virtual repulsion for generating repulsive force so as not to pass particles, and creating an analytic model expressing a mixing impeller by a movable moving wall (step S1); performing flow analysis of a plastic flow state of the excavated soil in the created analytic model (step S2); and visualizing the plastic flow state of the excavated soil in the chamber, based on results obtained by performing the flow analysis (step S3).SELECTED DRAWING: Figure 2
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