Prefabricated UHPC central anti-collision guardrail grouting connection structure

Abstract

The invention discloses a prefabricated UHPC central anti-collision guardrail grouting connection structure which comprises a main beam top plate provided with connecting steel bars and a UHPC anti-collision guardrail, wherein grouting sleeves are separately pre-embedded on the inner left and right sides of the bottom of the UHPC anti-collision guardrail; at least three internal shear connectors are distributed at intervals in the longitudinal direction on the inner wall of each grouting sleeve; external shear connectors corresponding to the internal shear connectors are distributed at intervals in the longitudinal direction on the outer wall of each grouting sleeve; the grouting sleeves are provided with openings for inserting the connecting bars into pouring chambers; and the grouting sleeves are provided with grout inlets positioned at the lower part and grout outlets positioned at the upper part. Grouting materials are poured into the pouring chambers to connect the UHPC anti-collision guardrail with the main beam top plate; the connection between the grouting sleeves and the UHPC anti-collision guardrail is achieved by virtue of the external shear connectors; and the groutingsleeves and the main beam top plate are connected into integration through the cooperation of the internal shear connectors, the connecting steel bars and the grouting materials. The prefabricated UHPC central anti-collision guardrail grouting connection structure avoids pre-embedding steel bars inside the UHPC anti-collision guardrail and facilitates the prefabrication of the UHPC anti-collisionguardrail.

Description

technical field [0001] The invention relates to the technical field of bridge construction structures, in particular to a prefabricated UHPC central crash barrier grouting connection structure. Background technique [0002] In recent years, my country has actively explored and enriched green construction methods that are fast, low road interference, and quiet, vigorously advocated prefabricated construction, and actively explored the application of new materials in prefabricated buildings. The crash barrier is an important part of the bridge. The structure of the UHPC crash barrier is simple, which is about 65% lighter than the traditional solid reinforced concrete crash barrier, and the structure has super toughness, which has obvious advantages. The connection is realized through the bottom plate bolts and the connecting steel bars pre-buried in the wing plate. During construction, workers need to climb over to the rear of the crash barrier to tighten the bolts. The operat...

AI Technical Summary

Problems solved by technology

The crash barrier is an important part of the bridge. The structure of the UHPC crash barrier is simple, which is about 65% lighter than the traditional solid reinforced concrete crash barrier, and the structure has super toughness, which has obvious advantages. The connection is realized through the bottom plate bolts and the connecting steel bars pre-buried in the wing plate. During construction, workers need to climb over to the rear of the crash barrier to tighten the bolts. The operation is complicated and dangerous. Therefore, the development of a new connection suitable for UHPC crash barriers is very necessary

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