Expansion joints for concrete structures

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint for concrete structure which can effectively tighten an expansion part of a flexible material to concrete structure and has high sealability.SOLUTION: An expansion joint 1 comprises: an expansion part 5 of a flexible material which is arranged over a joint part 3 of concrete structure 2, and has press parts 4 on both sides; a contact part 6 with a U-shaped cross section which is covered to the press parts 4 over a longitudinal direction; and a plurality of fixation units 10 for being pressed and fixed to the concrete structure 2 at an interval in the longitudinal direction of the contact part 6, in which the fixation unit 10 has: a short leg 11b folded downward located on the side of the joint part 3; and a long leg 11d folded downward located on the opposite side of the joint part 3, the long leg 11d has: a pressure part 11 which contacts the concrete structure 2 and is covered to the contact part 6; and an anchor bolt nut 14 for pressing the press part 4 to the concrete structure 2 via the pressure part 11, and the contact part 6 is located on the side of the joint part 3 to the anchor bolt nut 14.

Description

technical field [0001] The present invention relates to an expansion joint for concrete structures, in particular to an expansion joint for concrete structures that seals the gap between concrete structures. Background technique [0002] Internal and external water sealing is performed at the joints of joints such as underground drains such as aqueducts and public ditches that are concrete structures constructed of concrete. In this case, due to the uneven subsidence of the concrete structures on both sides or the influence of earthquakes, the distance between the concrete structures on both sides of the clamping joint will shift. In order to allow these shifts, a flexible telescopic Expansion joints for joint concrete structures. As such an expansion joint for a concrete structure, Patent Document 1 is known, for example. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2010-150807 [0006] However, for e...

AI Technical Summary

Problems solved by technology

[0006] However, for example, in Patent Document 1, there is a problem that once the anchor bolts and nuts are used to press and fix the concrete structure on both sides of the flexible member spanning the joint, even if it becomes loose due to impact, it cannot be further pressed. Flexible parts without the ability to reinforce anchor bolts and nuts

[0007] In addition, in conventional expansion joints for concrete structures, when a high internal pressure is applied from the inside of the flexible member, the sealability of the flexible member to the surface of the concrete structure becomes weak.

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