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Title:
GROUTING IN BASE ROCK
Document Type and Number:
Japanese Patent JP2008115618
Kind Code:
A
Abstract:

To surely exhibit water cut-off effect, and to lower water permeability in a grouting region.

Ca type bentonite slurry 11 obtained by melting Ca type bentonite with water and liquid sodium 12 are mixed in a mixing region 3A of a filling hole 3 which is a position immediately before injection to the base rock, and the modified Na type bentonite modified by the above mixing is injected to the base rock or Ca type bentonite slurry 11 is injected and mixed to the base rock where previously a sodium solution 12 is injected, so that the modified Na type bentonite absorbs groundwater in the base rock and interacts with water to be swollen. The modified Na type bentonite blocks up cracks in the base rock, thereby shutting off flowing of groundwater to exhibit water cut-off effect.


Inventors:
NOBUTO JUN
SHIRAISHI TOMONARI
Application Number:
JP2006300436A
Publication Date:
May 22, 2008
Filing Date:
November 06, 2006
Export Citation:
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Assignee:
SHIMIZU CONSTRUCTION CO LTD
International Classes:
E02D3/12; G21F9/36
Domestic Patent References:
JP2006249294A2006-09-21
JP2004196969A2004-07-15
JPS51132614A1976-11-17
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama



 
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