Method for evaluating the properties of excavated earth and sand in a chamber used for various excavation methods, and method for evaluating the soil quality of a face in front of a cutter head

摘要

PROBLEM TO BE SOLVED: To relatively evaluate and determine a property of excavated soil in a chamber.SOLUTION: In the method, an earth pressure gauge 16 and a shearing force measurement device 17 are disposed at various parts inside the chamber 12, closely to each other at an almost same position, for measuring pressure and shearing force exerted on various parts inside the chamber 12 with the earth pressure gauge 16 and the shearing force measurement device 17. A property of excavated sediment inside the chamber 12 is evaluated and determined based on a numeral obtained by dividing a value of shearing force by a value of earth and water pressure, measured at various parts inside the chamber 12.SELECTED DRAWING: Figure 1