PLASTIC FLUIDITY EVALUATION METHOD OF EXCAVATED EARTH IN CHAMBER IN EARTH PRESSURE TYPE SHIELD CONSTRUCTION METHOD, EVALUATION DEVICE, AND EARTH PRESSURE TYPE SHIELD EXCAVATOR

摘要

PROBLEM TO BE SOLVED: To provide a plastic fluidity evaluation method of an excavated earth in a chamber in an earth pressure type shield construction method capable of quantitatively evaluating plastic fluidity of the excavated earth in the chamber, an evaluation device, and an earth pressure type shield excavator.;SOLUTION: A plastic fluidity evaluation method of an excavated earth according to the present invention comprises: a step S1 of setting a viscosity parameter for an analysis model by performing a viscosity measurement test of each mud having different hardness simulating the excavated earth in advance before starting excavation; a step S2 of analyzing the plastic flow state of each mud in a chamber by flow analysis using the set viscosity parameter and obtaining an earth pressure variation at an installation position of an earth pressure gauge; a step S3 of setting a management value for construction management on the basis of the obtained earth pressure variation; a step S4 of evaluating the plastic flow state of the excavated earth in the chamber on the basis of the earth pressure variation and the management value obtained based on the earth pressure measured by the earth pressure gauge during excavation; and a step S5 of visualizing the evaluated plastic flow state of the excavated earth.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT