| 摘要 |
PURPOSE:To enhance the water-stopping characteristics by charging into a slit near an earth ground wall a mixture of an aqueous hydrophilic solution melted and solidified at a temperature of from normal temperature to a specific temperature and having a specified agar-agar concentration, a specified weight per unit volume and a specified water permeation, and inorganic fine powders/ organic paste material. CONSTITUTION:An earth-ground improver which can be melted and solidified at a temperature from normal temperature to 100 deg.C is charged and solidified into a slit 3 vertically formed near an earth ground wall 2, to form a deviation absorber 4. As this improver is used an aqueous solution of agar-agar, gelatine, or the like having affinity with water. The fusion temperature thereof is specified as 80 to 90 deg.C while the solidification temperature thereof is as 30 to 40 deg.C. Further, the agar-agar concentration of this aqueous solution is set to 0.2 to 4% and the weight thereof per unit volume is set to 1.0 to 1.3t/m<3>. Further, the water permeation coefficient thereof at the time when the earth ground improver is solidified due to temperature drop is specified as 1X10<-6> to 1X10<-8> cm/sec. By repeating this process, a continuous water stopper wall is constructed. This enhances the water-stopping characteristics. |
