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Total precast lower structure of bridge and construction method

A bridge and integral prefabrication technology, applied in the direction of bridges, bridge parts, bridge construction, etc., to achieve the effect of reducing hoisting weight, reducing construction site, and solving complex connections

Active Publication Date: 2017-09-15
BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a fully prefabricated substructure of a bridge and a construction method to solve technical problems such as the connection between the cover beam, the pier column and the foundation is simple and ensures good seismic performance

Method used

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  • Total precast lower structure of bridge and construction method
  • Total precast lower structure of bridge and construction method
  • Total precast lower structure of bridge and construction method

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Embodiment Construction

[0033] The overall cross-sectional structure diagram of the lower structure of the present invention is as follows figure 1 As shown, it is mainly composed of an integral prefabricated lower member 1, a prefabricated backing plate 2, a prestressed steel strand 3, and an anti-seismic steel bar 4. The main design principle: For the overall prefabrication of the bridge substructure that can use the enlarged foundation, it can be prefabricated in horizontal blocks according to the hoisting weight and transportation size, and each prefabricated component 1 is transported to the site for assembly. The monolithic prefabricated component 1 is composed of cover beams, pier columns, and enlarged foundation, and the component 1 is prefabricated in a factory as a whole. Bellows are reserved for the cover beam of component 1, and the components are connected in series through prestressed steel strand 3 during on-site assembly to strengthen the horizontal connection between component 1. Co...

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Abstract

The invention discloses a total precast lower structure of a bridge and a construction method. The structure is mainly composed of single whole precast lower components, a precast base plate, a prestressed steel strand and aseismic ribbed bars; single precast components which are precast in a factory overall are composed of cover beams, pier columns and enlarged foundations; the cover beams of the whole single precast components are reserved with corrugated pipes, and the prestressed steel strand is connected with the components in series through the reserved corrugated pipes in site assembly; concrete cast-in-site segments are arranged between the enlarged foundations of the single precast components, and the enlarged foundations of the single precast components are integrally connected in site construction; the whole precast base plate is arranged on the bottom of a whole foundation; when main beams to be precast is reserved on the tops of the cover beams of the precast components, the tops of the cover beams extend into the aseismic ribbed bars of main beam reserved holes. According to the total precast lower structure of the bridge and the construction method, the mode is simple, and the structure is suitable for a high intensity seismic zone.

Description

technical field [0001] The patent of the invention relates to the technical field of bridge structure and construction. Background technique [0002] The concept of prefabricated installations has long been accepted, but mainly for superstructures. After the concrete beam or steel beam is manufactured in the factory, it is transported to the construction site, and the beam can be erected only after the pier cover beam is completed. Currently, the prefabricated installation concept is being extended to the substructure. Capping beams and columns were initially prefabricated in the factory and then shipped to the construction site for installation. For example, this process has been implemented in some earthquake-free areas in the United States (such as Texas). But in some earthquake-prone areas, this method is rarely used. From a structural point of view, the two components of the column and the cover beam are the most convenient to install prefabricated. Because they ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D21/00
CPCE01D19/00E01D21/00
Inventor 张宏远桂睿潘可明贺大朋肖永铭
Owner BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
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