Concrete structure body and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2020157817-A1
Application number	US-201816631123-A
Country	US
Kind code	A1
Filing date	Apr 19, 2018
Priority date	Aug 25, 2017
Publication date	May 21, 2020
Grant date	—

Abstract

A concrete structure body includes a first concrete member having a first facing surface; a second concrete member having a second facing surface and disposed such that the first facing surface and the second facing surface face each other; a connection portion that fills a gap between the first facing surface and the second facing surface; and a tendon disposed in the connection portion to extend along the first facing surface and the second facing surface and to which a tensile force is applied in a longitudinal direction.

First claim

1 . A concrete structure body comprising:
a first concrete member having a first facing surface; a second concrete member having a second facing surface and disposed such that the first facing surface and the second facing surface face each other; a connection portion that fills a gap between the first facing surface and the second facing surface; and a tendon disposed in the connection portion to extend along the first facing surface and the second facing surface and to which a tensile force is applied in a longitudinal direction.

2 . The concrete structure body according to claim 1 , wherein the tendon compresses the connection portion with an adhesion force with respect to the connection portion.

3 . The concrete structure body according to claim 1 , wherein the tendon includes a twisted wire portion having a structure constituted by a plurality of steel wires that are twisted together, the twisted wire portion extending in the connection portion along the first facing surface and the second facing surface.

4 . The concrete structure body according to claim 1 , wherein the tendon includes a cover layer that covers an outer circumference of the tendon.

5 . The concrete structure body according to claim 1 , comprising a plurality of the tendons.

6 . The concrete structure body according to claim 1 , wherein the connection portion is made of concrete or mortar.

7 . A method of manufacturing a concrete structure body, comprising:
a step of disposing a first concrete member having a first facing surface and a second concrete member having a second facing surface such that the first facing surface and the second facing surface face each other; a step of disposing a tendon so as to extend along the first facing surface and the second facing surface and, while holding the tendon with a holding member disposed to straddle on an external wall of the first concrete member and on an external wall of the second concrete member, applying a tensile force to the tendon in a longitudinal direction of the tendon; a step of filling a gap between the first facing surface and the second facing surface with a filling material that solidifies with a lapse of time; and a step of removing the holding member that holds the tendon extending in the filling material that has solidified.

8 . The method of manufacturing the concrete structure body according to claim 7 , wherein, after the step of applying the tensile force to the tendon in the longitudinal direction of the tendon, the step of filling the gap between the first facing surface and the second facing surface with the filling material is performed.

9 . The method of manufacturing the concrete structure body according to claim 7 , wherein the tendon includes a twisted wire portion constituted by a plurality of steel wires that are twisted together.

10 . The method of manufacturing the concrete structure body according to claim 7 , wherein the tendon includes a cover layer that covers an outer circumference of the tendon.

11 . The method of manufacturing the concrete structure 1 body according to claim 7 , wherein, in the step of applying the tensile force to the tendon in the longitudinal direction of the tendon, a plurality of the tendons are disposed, and a tensile force is simultaneously applied to the plurality of tendons in the longitudinal direction of the tendons.

12 . The method of manufacturing the concrete structure body according to claim 7 , wherein the holding member is disposed to be spaced from the filling material.

13 . The method of manufacturing the concrete structure body according to claim 12 , wherein, between the holding member and the filling material, an intermediate member that impedes contact between the holding member and the filling material is disposed.

14 . The method of manufacturing the concrete structure body according to claim 7 , wherein the holding member includes
a wedge member that restricts the tendon, and a grip member that holds the wedge member.

15 . The method of manufacturing the concrete structure body according to claim 7 , wherein the filling material is uncured concrete or uncured mortar.

Assignees

• Sumitomo Electric Industries

Inventors

• Nishino Motonobu
• Yamada Masato

Classifications

• E04G21/12

  Mounting of reinforcing inserts; Prestressing (shell tubes for prestressing members E04C5/10; anchoring means E04C5/12; connections of reinforcing elements and spacers E04C5/16) · CPC title

• E01D19/125 Primary

  Grating or flooring for bridges (waterproofing thereof E01D19/083; floors in general E04B5/00) · CPC title

• E04C5/122

  the tensile members are anchored by wedge-action · CPC title

• E01D2101/26

  reinforced · CPC title

• E04C5/08 Primary

  Members specially adapted to be used in prestressed constructions {(production of reinforced objects in general B28B23/00; prestressed structures produced in situ E04G21/12)} · CPC title