Bidirectional ribbed multi-cavity concrete-filled steel tube pier and framework and construction method thereof

A technology for concrete-filled steel tubes and bridge piers, which is applied in bridges, bridge parts, bridge materials, etc., can solve the problems of poor confinement effect of core concrete and large amount of concrete, so as to reduce the phenomenon of steel pipe detachment and core concrete cracking, and enhance the restraint and The effect of high ferrule ability and universality

Pending Publication Date: 2020-09-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Bridge piers are sub-structures that support the bridge span structure and transmit the dead load and live load to the foundation. Traditional bridge piers mostly use reinforced concrete solid piers, which have the defects of large amount of concrete and poor confinement effect of core concrete

Method used

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  • Bidirectional ribbed multi-cavity concrete-filled steel tube pier and framework and construction method thereof
  • Bidirectional ribbed multi-cavity concrete-filled steel tube pier and framework and construction method thereof
  • Bidirectional ribbed multi-cavity concrete-filled steel tube pier and framework and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A bridge pier skeleton, comprising: central steel pipe column 6, outer pipe 1, two-way ribs 3, two-way ribs 4, rib holes 5, first weld 7, second weld 8, concrete protection layer 9 and inner concrete 2.

[0036] The central steel pipe column 6 is located at the center of the pier, and its cross section is one of symmetrical polygons such as rectangle and hexagon.

[0037] The outer pipes 1 are evenly distributed around the central steel pipe column 6 at intervals, and the cross section of the outer pipes 1 is one of symmetrical polygons such as rectangles and hexagons. A first weld 7 is provided at the joint between the central steel pipe column 6 and the outer pipe 1 .

[0038] Two-way ribs 4 and two-way ribs 3 are connected between two adjacent outer tubes 1 through the second weld 8 in sequence: outer tube 1, two-way ribs 3, two-way ribs 4, and outer tube 1, wherein the two-way There is one rib 3 and several bidirectional ribs 4 . Each of the ribs includes a base ...

Embodiment 2

[0044] A bridge pier, which uses the pier skeleton in Example 1, and the pier can be made into two structures: hollow pier and solid pier, wherein the hollow pier is filled with concrete 2 except for the central steel pipe column 6; the solid pier does not have a center Concrete 2 is poured into the inner space of the steel pipe column and the first weld 7 .

[0045] The concrete protective layer 9 is poured in the outer rib area of ​​the bridge pier, and the thickness of the protective layer is greater than the flange length of the two-way rib 3 and the two-way rib 4.

Embodiment 3

[0047] A bridge pier construction method, comprising the steps of:

[0048] a. Prefabricate the two-way ribs 3 and the two-way ribs 4 in the factory;

[0049] b. Weld the outer pipe 1 evenly at intervals around the central steel pipe column 6, and connect the diagonal gaps at the joints with the first weld 7;

[0050] c. Splice two-way ribs 3 and two-way ribs 4 in sequence between two adjacent outer tubes 1, so that the inner and outer ribs are evenly distributed, and the diagonal gaps at the joints are connected by the second weld 8;

[0051] d. Concrete 2 is poured in the inner space other than the steel pipe column 6 in the center of the pier;

[0052] e. Concrete protection layer 9 is poured in the outer rib area of ​​the pier, and the thickness of the protection layer 9 is greater than the length of the flanges of the two-way rib 3 and the two-way rib 4.

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Abstract

The invention aims to provide a bidirectional ribbed multi-cavity concrete-filled steel tube pier and a framework and a construction method thereof. High strength advantage is achieved, according to the technical scheme, a central pipe column and outer pipes surrounding the central pipe column are comprised, wherein two adjacent outer pipes are arranged at an interval, a rib plate is arranged at the interval between each two adjacent outer pipes; it is characterized in that each rib plate comprises a base plate and flanges led out from the base plate, the rib plates are divided into one-way rib plates and two-way rib plates, and second welding seams are arranged among the outer pipes, the one-way rib plates and the two-way rib plates. The constraint effect on core concrete can be enhancedthrough the inner and outer bidirectional ribs and the central steel pipe, the steel pipe disengagement phenomenon and the core concrete cracking phenomenon are reduced, the lateral resistance, bending resistance and seismic resistance of the pier are improved, and the corrosion resistance and durability are enhanced through an outer protection layer.

Description

technical field [0001] The invention relates to the field of steel pipe concrete piers, in particular to a two-way ribbed multi-cavity steel pipe concrete bridge pier, its skeleton and a construction method. Background technique [0002] Bridge piers are sub-structures that support the bridge span structure and transmit the dead load and live load to the foundation. Traditional bridge piers mostly use reinforced concrete solid piers, which have the defects of large amount of concrete and poor confinement effect of core concrete. [0003] At present, the measure usually adopted in the industry is: making the central axis of the pier into a hollow structure. Under this premise, the reliable strength requirements of the steel skeleton of the bridge piers are even higher. Contents of the invention [0004] The purpose of the present invention is to provide a bridge pier skeleton with the advantage of high strength. The technical solution includes a central pipe column and out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/02E01D21/00E01D101/24E01D101/30
CPCE01D19/02E01D21/00E01D2101/268
Inventor 王城泉孙泽轩邹昀董腾方薛文星蒋华东
Owner JIANGNAN UNIV
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