WIRE SAW EXCAVATOR, CUT-OFF WALL OR LANDSLIDE PROTECTION CONSTRUCTION CONSTRUCTED THEREBY AND CONSTRUCTION METHOD THEREOF

WIPO Patent Application WO/1992/021826

A1

In the ground (T), preceding holes (3) are dug and also a portion between adjoining preceding holes (3) is excavated by use of a wire saw device (9) to thereby form a sheet insertion groove (4), into which a cut-off sheet (5) is inserted, while, engageable portions (7) provided at opposite end portions in the widthwise direction of the cut-off sheet (5) are positioned within the preceding hole (3), whereby the cut-off sheet (5) is pulled into the sheet insertion groove (4). Bentonite mortar is filled in the preceding hole (3) and the sheet insertion groove (4), which are brought into a water-tight state, to thereby form a cut-off sheet wall (1). The ground (T) is excavated by use of the wire saw device (9) and a sheet setting device (10) to thereby form the sheet insertion groove (4), while the cut-off sheet (5) is pulled into the sheet insertion groove (4), so that the working efficiency for constructing the cut-off sheet wall (1) is improved, and moreover, the insertion of the cut-off sheet (5) into the sheet insertion groove (4) can be easily and accurately performed, to thereby improve the construction accuracy.

WATANABE TOSHIO (JP)
OHNISHI YUUJI (JP)
NISHIMURA SHINICHI (JP)
KAJIOKA YASUO (JP)
MUKAWA YOSHIHIRO (JP)
SATOH HITOSHI (JP)

PCT/JP1992/000062

December 10, 1992

January 24, 1992

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SHIMIZU CONSTRUCTION CO LTD (JP)

E02D5/20; E02D17/13; E02D19/18; E02F3/10; E02F5/02; (IPC1-7): E02D5/20; E02D17/13

JPH02171412A	1990-07-03
JPH02171415A	1990-07-03
JPH02171423A	1990-07-03
JPH02178418A	1990-07-11

See also references of EP 0541813A4

Shiga, Masatake (Shibaura 1-chome Minato-ku, Tokyo 105, JP)

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