FORMATION METHOD OF WATER PERMEABLE PART IN CONTINUOUS UNDERGROUND WALL

Japanese Patent JP3245537

B2

PROBLEM TO BE SOLVED: To form a water permeable part to circulate underground water after construction of an underground structure on continuous underground walls constructed on both sides at the time of constructing the underground structure.
SOLUTION: This formation method of a water permeable part is to excavate a vertical hole 2 on a part of a continuous underground wall A to be constructed, to fill a mixture of a guagum high viscous water solution 4 and excavated sedimentin the inside of this vertical hole 2, to erect a steel pipe sheet pile 5 with a slit arranging a partition plate 6 inside free to extract and to integrally connect both side end parts of this steel pipe sheet pile 5 to a wall body part of the continuous underground wall A facing against both sides of the vertical hole 2. Thereby, guagum displays high viscosity by mixture with water, collapsion of a hole wall of the vertical hole 2 is prevented by this guagum high viscous water solution 4, and the inside of the vertical hole 2 becomes non-water-permeable. Additionally, when guagum is decomposed by underground bacteria, viscosity of the high viscous water solution 4 is lowered, it comes to be in a state like water, the vertical hole 2 becomes a water permeable part 1, and it comes to be possible to flow underground water through the slit 9 of the steel pipe sheet pile 5 by extracting the partition plate 6.

Masanori Watanabe

JP29566796A

January 15, 2002

October 16, 1996

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Okumura Gumi Co., Ltd.

E02D5/20; (IPC1-7): E02D5/20

JP6443615A
JP3286016A
JP617417A
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Takuya Yamamoto

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