| 摘要 |
PROBLEM TO BE SOLVED: To effectively obtain and evaluate the plastic fluidity of excavated soil in a chamber, in an earth pressure shield construction method.SOLUTION: Earth pressure gauges for measuring the earth pressure of excavated earth at a plurality of positions in a chamber are installed at positions near passing loci of stirring blades, respectively. An index value which becomes an indication of variation situation of the earth pressure when the stirring blade passes near the earth pressure gauge is obtained from a measured value measured by each of the earth pressure gauges, and the plastic fluidity of the excavated earth at the plurality of positions in the chamber is evaluated on the basis of the index values. Measurement results are handled as waveform data and the index value is obtained on the basis of the variation situation of the waveform data. A deviation earth pressure and/or Fourier amplitude is used as the index value. Evaluation results are visually displayed in a display of a management computer. The management computer is provided as management means for calculating the index value from the measured value of the earth pressure gauge and evaluating/displaying the plastic fluidity. |
