INDUCING METHOD OF PRESTRESS AND CONCRETE STRUCTURE

Japanese Patent JP2764780

B2

PURPOSE: To make a prestress method inductible by embedding a part of tensile steel for a grip lockup into a spot by way of making a grip shiftably and also the raining part of the steel into concrete or the like after concrete hardening, respectively.
CONSTITUTION: Two forms are set up after being divided into both preceding and succeeding applications, and a steel member 1 is set up in the concrete form to be placed previously. In this case, plural pieces of hollow vessels 21 are attached to plural spots of this steel member 1, and each grip 2 is housed in these hollow vessels 21. Next, one end of this steel member 1 is fixed to the form at the opposite side to the succeeding form, then concrete is placed in leaving it set up in the form intact. In succession, after the preceding concrete 3 is hardened, tensile force is induced into the steel member 1 from the succeeding form side, and the grip 2 is reached to an end face of the succeeding form side of the hollow vessel 21 and stopped. Successively the form at the end face of the preceding concrete 3 is removed away, and the succeeding concrete is placed and, after hardening, the tensile force is opened free. Then the grip 2 at the succeeding side is shifted to the side of the preceding concrete 3 in the hollow vessel 21, and this force acts on the preceding side.

JP2006188603	CURABLE RESIN COMPOSITION FOR COATING PRE-STRESSED CONCRETE TENDON
WO/1982/003102	STRUCTURAL MEMBER
JP3427208	CONCRETE STRUCTURE

HASHIMOTO ISAO
NAITO TEIJI
TAKAHASHI SHIGEO
HARUYAMA SHICHIRO

JP35279992A

June 11, 1998

December 14, 1992

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TAISEI KENSETSU KK
SUZUKI KINZOKU KOGYO KK
SANWA DOSHITSU KISO KK

E04C5/08; E04G21/12; E21D9/00; E21D20/00; (IPC1-7): E04G21/12; E04C5/08; E21D9/00; E21D20/00

Sakuo Yamaguchi (1 person outside)

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