Prefabricated UHPC central anti-collision guardrail grouting connection structure

A technology of anti-collision guardrails and prefabrication, which is applied to bridge parts, bridges, buildings, etc., can solve the problems of complex operation and high degree of danger, and achieve the effect of convenient prefabrication and suitable for industrial assembly line production

CN108755403APending Publication Date: 2018-11-06GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-06

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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.
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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...

Examples

Embodiment Construction

[0024] refer to Figure 1 to Figure 5 , the prefabricated UHPC central anti-collision barrier grouting connection structure of the present invention, including the main beam top plate 10 and the UHPC anti-collision barrier 20, the main beam top plate 10 protrudes with connecting steel bars 11, and the left and right sides of the bottom of the UHPC anti-collision barrier 20 are embedded inside There is a grouting sleeve 30, the interior of the grouting sleeve 30 is hollow and has a grouting chamber 31, the bottom of the grouting sleeve 30 has an opening 32, when the grouting sleeve 30 is pre-buried in the UHPC crash barrier 20, the opening 32 of the grouting sleeve 30 It is flush with the surface of the bottom wall of the UHPC anti-collision guardrail 20, and the opening 32 is used for inserting the connecting steel bar 11 into the pouring chamber 31. The length of the connecting steel bar 11 extending into the pouring chamber 31 is not less than 9 times the diameter of the conn...