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Title:
WATER CONDUCTING HOLE OF UNDERGROUND WALL AND CONSTRUCTION METHOD OF THE SAME
Document Type and Number:
Japanese Patent JP2013159927
Kind Code:
A
Abstract:

To provide a water conducting hole of an underground wall and its construction method capable of efficiently forming a water conducting hole of a prescribed width.

When cutting an underground wall 1 by jetting slurry containing an abrasive material at a high pressure toward an outer wall surface 1a from a nozzle 15 arranged in an insertion hole 6 provided inside the underground wall 1, by performing the operation of rotating a direction of the nozzle 15 by a prescribed angle around a prescribed axis along the insertion hole 6 while jetting the slurry, stopping it and then turning a jetting direction from the nozzle 15 to a fixed state for prescribed time for a plurality of rotation positions, the underground wall 1 is cut. Thus, a shape inside a slit hole 7 formed from the insertion hole 6 to the outer wall surface 1a is roughly triangular or roughly sectorial whose vertex is the axial center in prescribed axial view along the insertion hole 6 and opposite side or arc is the outer wall surface 1a.


Inventors:
NISHIMURA SHINICHI
NIIZAKA TAKASHI
MORIWAKI MITSUHIRO
Application Number:
JP2012021023A
Publication Date:
August 19, 2013
Filing Date:
February 02, 2012
Export Citation:
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Assignee:
SHIMIZU CONSTRUCTION CO LTD
SANSHIN CORP
International Classes:
E02D5/20
Domestic Patent References:
JP2008081942A2008-04-10
JP2004176498A2004-06-24
JP2009150065A2009-07-09
JP2009057760A2009-03-19
JP2003155740A2003-05-30
JP2008081941A2008-04-10
Foreign References:
GB2147039A1985-05-01
US5444950A1995-08-29
Attorney, Agent or Firm:
Hiroaki Sakai