MEASURING SYSTEM FOR VISCOSITY OF MUDDY WATER

摘要

PROBLEM TO BE SOLVED: To provide a measuring system for the viscosity of muddy water, by which the viscosity of the muddy water inside a chamber, can be measured in real time and precisely in a muddy-water-type shield method of construction. SOLUTION: By a flow branching device 200 which is installed in the flow passage of a mud discharge pipe 48 adjacent to a chamber 42, muddy water which contains a coarse particle portion is made to flow to the mud discharge pipe 48 as a main stream, and muddy water from which the coarse portion is removed is made to flow to a branch stream. A branch pipe 230 as a branch stream is branched from the flow branching device 200, and the muddy water from which the coarse particle portion is removed is made to flow. A pump 210 which is installed at the branch pipe 230 introduces the muddy water from the flow branching device 200. A control device 62 regulates the introduction force of the pump 210. A vibration-type viscosimeter 220 which is installed at the branch pipe 230 measures the viscosity of the muddy water from which the coarse particle portion is removed.