A normal-temperature perfusion bridge seamless expansion joint and its construction method

Abstract

The invention discloses a normal temperature pouring bridge seamless expansion joint and a construction method thereof. The normal temperature pouring bridge seamless expansion joint comprises a notch formed in the upper part of a gap between adjacent beams, and a cross-gap plate arranged at the bottom of the notch, wherein a flexible filler is filled in the gap between the adjacent beams; a two-component polyurethane pouring rubble layer and a film layer are sequentially arranged in the notch from the upper part to the lower part; the film layer is arranged on the upper surface of the cross-gap plate; the notch is provided with a plurality of positioning nails at an interface where the notch is in contact with an original pavement. The normal temperature pouring bridge seamless expansion joint thoroughly breaks the technological process of site heating and blending required by the traditional seamless expansion joint, realizes the construction technology of normal temperature rubble pour of the seamless expansion joint, does not need special heating and melting equipment for performing heating treatment on cementing materials and stone materials, and is simple in construction technology and low in cost.

Description

technical field [0001] The invention relates to a seamless expansion joint of a room-temperature perfusion bridge and a construction method thereof. Background technique [0002] Bridge expansion joints are set between the bridge girder ends, between the girder end and the bridge abutment, or at the hinge position of the bridge to coordinate the temperature and humidity changes, concrete shrinkage and creep, the settlement of the bridge upset and the beam end rotation, etc. Devices that cause deformation of the bridge deck. Under the coupling effect of driving dynamic load and expansion and deformation stress, the bridge expansion joints directly exposed to the atmosphere become the weak link of the bridge. The quality of bridge expansion joints directly determines the driving comfort and safety, which further affects the service life of the entire bridge. [0003] Compared with bridge expansion joints with complex structures and high costs, such as stuffing butt joint, em...

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Problems solved by technology

[0005] In order to overcome the lack of high-temperature stability, poor low-temperature crack resistance, small low-temperature expansion and cumbersome installation and construction techniques of existing bridge seamless expansion joints that use asphalt, modified asphalt or thermoplastic (TST) as cementing materials and other defects, the present invention proposes a normal-temperature perfusion bridge seamless expansion joint and its construction method, which simplifies the installation and construction of bridge expansion joints, and thus is more suitable for use

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