Seepage control structure and seepage control method in the joint portion of the impervious wall, deformation following capability impervious material

摘要

PROBLEM TO BE SOLVED: To provide an impervious structure at the joint part of an impervious wall and an impervious method capable of improving imperviousness at the joint part of the impervious wall and securing imperviousness since an impervious member is deformed according to the deformation, even if the impervious wall is deformed by an earthquake.;SOLUTION: Holes 21 are formed at an impermeable base 7 by using a drilling machine 23 such as an auger. The holes 21 are formed with diameters completely surrounding the joint part 13. A deformation follow-up impervious material 15 made of sand 16, seawater 17, and highly swelling bentonite 18 is placed in the holes 21. A U-shaped steel sheet pile 5 is so installed that joints 11 at both edges of the U-shaped steel sheet pile 5 can be inserted into the holes 21 filled with the deformation follow-up impervious materials 15. The other U-shaped steel sheet pile 5 is so installed that the joint 11 of the U-shaped steel sheet pile installed previously can be connected to the joint 11 of the other U-shaped steel sheet pile 5.;COPYRIGHT: (C)2008,JPO&INPIT