Prefabricating method for UHPC small box beam end diaphragm

A technology of small box girders and diaphragms, applied to bridges, manufacturing tools, bridge materials, etc., can solve the problems of large amount of construction work on site, unfavorable rapid construction, easy damage of horizontal connections, etc., and achieve the effect of improving prefabrication efficiency
CN108943378AInactive Publication Date: 2018-12-07GUANGZHOU 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
GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
Publication Date
2018-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a prefabricating method for a UHPC small box beam end diaphragm. A box beam body is prefabricated by adopting ultra-high-performance concrete, the diaphragm is prefabricated atthe end of the box beam body after the box beam body reaches the preset strength, a cast-in-situ material of the diaphragm adopts ultra-high-performance concrete or common concrete, retard-bonded prestressed tendon tensioning operation is conducted after the diaphragm reaches the preset strength, and finally high-pressure steam curing is conducted on the whole box beam body. The prefabricated boxbeam body is adopted and cooperates with post-poured UHPC or common concrete to form the diaphragm, the cast-in-situ end partition and the prefabricated UHPC box beam body can be effectively connected into a whole, the thickness of the diaphragm can be selectively adjusted according to the pouring concrete material, the prefabricating efficiency of the UHPC small box beam end diaphragm is effectively improved, and the prefabricating method is more suitable for bridge industry assembly line production.
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Description

technical field

[0001] The invention relates to the technical field of bridge engineering structures, in particular to a prefabrication method for a diaphragm at the end of a UHPC small box girder. Background technique

[0002] In recent years, my country has actively explored and enriched green bridge construction methods with high speed, low road interference and quietness, vigorously advocated prefabricated construction of bridges, and actively explored the application of new materials in prefabricated bridges, and built a large number of representative bridges. The prefabricated bridges, industrialized production and prefabricated construction of bridges have become a major trend.

[0003] Although there are various types of prefabricated bridges, they all have their own shortcomings: the steel structure has a large amount of on-site welding (bolts), and the steel bridge deck has fatigue cracking problems; the steel-concrete composite structure has a large self-weight, an...

Claims

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