Semi-prefabricated pier with UHPC shell and inner and outer double-layer steel bars and construction method thereof

Abstract

The invention discloses a semi-prefabricated bridge pier with UHPC shell inner and outer double-layer steel bars and a construction method thereof. The bridge pier comprises a prefabricated bridge pier shell; the prefabricated pier shell is formed by pouring UHPC materials, and a plurality of outer ring longitudinal steel bars and a plurality of outer ring annular stirrups are arranged in the shell wall. A plurality of inner-ring longitudinal steel bars and a plurality of inner-ring annular stirrups are arranged in the inner cavity; the outer-ring longitudinal steel bars and the inner-ring longitudinal steel bars extend downwards to be anchored on the bearing platform; inner ring reinforcing connection longitudinal steel bars are arranged in the bearing platform corresponding to the inner ring longitudinal steel bars, and connection reinforcing constraint stirrups are arranged in the bearing platform corresponding to the inner ring annular stirrups on the inner ring longitudinal steel bar anchors. During construction, firstly, the prefabricated pier shell is manufactured, and a template of a bearing platform is built; after the prefabricated pier shell is in place, steel reinforcement cages are arranged in the bearing platform and an inner cavity of the prefabricated pier shell; then the bearing platform is poured; and finally, concrete mortar is poured into the inner cavity. The bearing capacity of the pier is greatly improved, and the prefabricated pier shell can also be used as a formwork.

Description

technical field [0001] The invention relates to the technical field of bridge pier construction, in particular to a semi-prefabricated bridge pier with inner and outer double-layer steel bars of a UHPC shell and a construction method thereof. Background technique [0002] In the existing technology, the use of UHPC materials can greatly improve the bearing capacity of the original structure, but UHPC materials are expensive, so it is necessary to use UHPC materials where they are most needed without greatly increasing the difficulty of manufacturing the structure. [0003] Therefore, how to use a small amount of UHPC material to improve the mechanical properties of bridge piers while taking into account the convenience of construction of bridge piers has become an urgent technical problem to be solved by those skilled in the art. Contents of the invention [0004] In view of the above-mentioned defects of the prior art, the present invention provides a semi-prefabricated b...

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Problems solved by technology

[0002] In the existing technology, the use of UHPC materials can greatly improve the bearing capacity of the original structure, but UHPC materials are expensive, so it is necessary to use UHPC materials where they are most needed, and at the same time, it cannot greatly increase the difficulty of manufacturing the structure

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