| 摘要 |
PURPOSE:To prevent viscous soil from adhering to the inside of a chamber by mixing aqueous solution of polyacrylamide high-molecular compound into muddy water, and forming films on the surfaces of soil particles of an excavated soil to excavate. CONSTITUTION:In a muddy water treatment plant 4 on the ground, a mixture of muddy water and polyacrylic system high-molecular compound is sent to the inside of a chamber 3 through a muddy water pipe 1 of a shield excavator A. Films are formed on the surfaces of soil particles of an excavated soil by aqueous solution sent to the inside of the chamber 3, and the aqueous solution in the chamber 3 is conveyed to the plant 4 together with muddy water through a sludge pipe 2 in a state to make it easy to slip the soil particles each other. |
