Bridge continuous beam temporary consolidation structure convenient to disassemble

Abstract

The utility model belongs to the technical field of building components, and particularly relates to a convenient-to-disassemble temporary consolidation structure for a continuous beam of a bridge. Comprising grouting sleeves, thick steel bars, temporary consolidation stand columns and cement grouting materials. The grouting sleeve is pre-buried in a main beam of a bridge, and a sleeve opening is downwards exposed out of the bottom of the main beam; the temporary consolidation stand column is tightly attached to the lower portion of the main beam. The lower ends of the thick steel bars are arranged in the temporary consolidation stand columns, and the upper ends of the thick steel bars are inserted into the grouting sleeves. Thick steel bars are arranged in the temporary consolidation column, so that the temporary consolidation column is tightly attached to the main beam, and the temporary consolidation column can bear certain horizontal force. And after the temporary consolidation function is completed, the thick steel bars in the temporary consolidation column are withdrawn, and then cement grouting materials are poured into the grouting sleeves, so that the purpose of sealing the embedded holes in the main beam is achieved, and the overall section is formed. The structure is convenient to assemble and disassemble and low in difficulty, reduces the risk caused by cutting or ignition of the main beam in a conventional structure, and improves the durability of a main body structure.

Description

Technical Field

[0001] This utility model belongs to the field of building component technology, specifically relating to a temporary fixed structure for a continuous beam of a bridge that is easy to disassemble. Background Technology

[0002] Temporary fixing structures are widely used in cantilevered concrete continuous beam bridges, partially concrete cable-stayed bridges, and concrete cable-stayed bridges. These temporary fixing structures must not only be closely fitted to the main beam to ensure safety during construction, but also be dismantled and separated from the main beam after the structure is assembled.

[0003] The commonly used temporary fixed structures include the following methods: (1) The top reinforcement of the concrete temporary column is inserted into the main beam, and sulfur mortar is set at the bottom of the column and the main beam to fill the gap; after the main beam is closed, the sulfur mortar is ignited and the reinforcement embedded in the main beam is cut off to form a separation; (2) The temporary column is directly fixed to the main beam. After the main beam is closed, the concrete and reinforcement are mechanically cut to separate the concrete interface between the column and the main beam; (3) Steel pipe columns are used. The top of the column is connected to the main beam through pre-embedded steel plates and anchor bars. After the main beam is closed, the steel pipe is cut off, and the pre-embedded steel plates and anchor bars are not removed.

[0004] For structure (1), igniting the construction with fire poses certain risks and can easily result in poor color of the concrete at the bottom of the main beam. For structure (2), the cutting process requires accurate alignment with the bottom of the beam, which is quite difficult to implement, and the exposed reinforcing steel at the joint surface also has an adverse effect on the durability of the structure. For structure (3), the use of steel pipe columns results in slightly weaker overall stability and makes the steel pipe columns prone to instability; moreover, the embedded steel plates are not removed, which affects the appearance. Summary of the Invention

[0005] The purpose of this invention is to provide a temporary fixed structure for a continuous beam that is easy to disassemble.

[0006] The present invention proposes a temporary fixed structure for a continuous beam that is easy to disassemble, comprising a grouting sleeve, thick reinforcing bars, and a temporary concrete fixed column; wherein:

[0007] The grouting sleeve is embedded in the concrete main beam of the bridge, and the opening of the grouting sleeve protrudes downwards from the bottom of the main beam.

[0008] The temporary concrete support column is installed close to the underside of the main beam;

[0009] The lower part of the thick steel bar is vertically installed in the temporary concrete support column, while the upper part of the thick steel bar is inserted into the grouting sleeve through the opening of the grouting sleeve; the outer diameter of the thick steel bar and the inner diameter of the grouting sleeve are matched.

[0010] In this utility model, a cement grouting material is also provided. After the thick steel bar is removed from the grouting sleeve, the cement grouting material can be placed inside the grouting sleeve and filled. The cement grouting material is a high-strength, non-shrink cement grouting material.

[0011] In this invention, there are two temporary concrete support columns, symmetrically arranged on both sides of the main beam.

[0012] In this invention, the grouting sleeve is installed and embedded in the main beam during the construction of the concrete main beam of the bridge.

[0013] In this invention, the quantity of the thick steel bars is determined based on the horizontal force borne by the temporary fixed structure.

[0014] In use, this invention involves placing thick steel bars in a temporary concrete consolidation column and inserting a grouting sleeve. The grouting sleeve is embedded in the main beam during its pouring, achieving a close fit between the temporary concrete consolidation column and the main beam, and enabling it to withstand a certain horizontal force. After the temporary consolidation function is completed, the temporary concrete consolidation column is removed. During removal, the temporary consolidation column, along with the thick steel bars, is pulled out from under the main beam. High-strength, non-shrink cement grout is then injected into the grouting sleeve to seal the pre-embedded holes in the main beam, forming an integral cross-section.

[0015] This invention incorporates the grouting sleeve technology from precast bridge construction into a key measure of cantilever construction, forming a temporary fixed structure for continuous beams that is easy to disassemble. Considering the stress characteristics of the temporary fixed structure and fully taking into account structural safety and durability, the functions, layout, and construction procedures of each part of this invention are determined.

[0016] The beneficial effects of this utility model are as follows: the use of concrete columns improves the overall stability of the temporary fixed structure; at the same time, the sleeve structure facilitates installation and disassembly, effectively reducing construction difficulty and cost, reducing the risks of cutting or igniting the main beam in conventional structures, and the main beam after construction has excellent structural durability; and it has little impact on the appearance of the main beam structure and does not affect the overall effect of the bridge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the partial elevation layout along the bridge direction of this utility model.

[0018] Figure 2 This is a partial planar layout diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the overall elevation layout along the bridge direction of this utility model.

[0020] The numbers in the diagram are: 1 for grouting sleeve; 2 for thick steel bar; 3 for temporary concrete support column; 4 for main beam; and 5 for concrete column pier. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] This utility model is used for the construction of the main beam 4 and permanent pier column 5 of the bridge body, including grouting sleeve 1, thick steel bar 2, temporary concrete consolidation column 3, and cement grouting material;

[0023] The main beam 4 is a variable cross-section prestressed concrete main beam, and the permanent pier is a concrete column pier 5; the concrete temporary fixed column 3 serves as a temporary support column for the main beam 4 before the concrete column pier 5 is erected. The concrete temporary fixed column 3 is set on both sides of the main beam 4, close to the concrete column pier 5.

[0024] The top of the temporary concrete support column 3 is provided with a φ70mm thick steel bar 2, that is, the lower part of the thick steel bar 3 is vertically installed in the temporary concrete support column 3, and the upper part of the thick steel bar 2 is inserted into the grouting sleeve 1 through the opening of the grouting sleeve 1; the outer diameter of the thick steel bar 2 and the inner diameter of the grouting sleeve 1 are matched; the number of thick steel bars 2 is determined according to the horizontal force borne by the temporary support structure.

[0025] The main beam 4 is pre-embedded with a GT40 grouting sleeve 1 and a matching grouting pipe, and the opening of the grouting sleeve is exposed downward at the bottom of the main beam 4.

[0026] After the thick steel bar 2 is removed from the grouting sleeve 1, the cement grout can be placed inside the grouting sleeve and filled; the cement grout is high-strength non-shrink cement grout.

[0027] During construction, temporary concrete support columns are erected, and the reinforcing bars of the temporary columns are tied together. Vertically upward-pointing thick reinforcing bars are then tied to the top of the temporary column reinforcement. Concrete is then poured onto the temporary column reinforcement to form the temporary concrete support column. A grouting sleeve is placed over the upper part of the thick reinforcing bars, and the grouting sleeve and the main beam reinforcement are tied together. Concrete is then poured above the temporary column to form the main beam. This structure remains in use during the cantilever construction of the continuous beam. After the main beam is closed, the temporary support structure needs to be removed. At this time, the temporary concrete support column is cut or broken from the lower part, avoiding cutting at the junction of the column top and the main beam to prevent impact on the main beam. After the lower part of the temporary support column is removed, the upper thick reinforcing bars are pulled out from the grouting sleeve. Then, high-strength, non-shrink cement grout is injected into the grouting sleeve from the outside using a grouting pipe to fill and seal the pre-embedded grouting sleeve in the main beam.

[0028] This invention utilizes a temporary fixing structure, a crucial component in the cantilever construction of continuous beams. This temporary structure secures the main beam, enabling cantilever construction. After the main beam is closed, the temporary fixing structure is removed, restoring the support system. This structure achieves close contact between the temporary fixing column and the main beam by inserting thick reinforcing bars into pre-embedded grouting sleeves in the main beam, ensuring the column can withstand a certain level of horizontal force. Once the temporary fixing is complete, the reinforcing bars are removed from the column, and high-strength, non-shrink cement grout is injected into the grouting sleeves, sealing the pre-embedded holes in the main beam and forming a seamless cross-section.

[0029] The structure of this utility model is easy to install and disassemble, has low construction difficulty, reduces the risks of cutting or igniting the main beam in conventional structures, and improves the durability of the main structure.

[0030] Although the above methods are illustrated and described as a series of structures for the sake of simplicity, it should be understood and appreciated that these methods are not specifically limited, as some structures may occur in different orders and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0031] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temporary construction of a continuous beam of a bridge which is easily disassembled, characterized in that, This includes grouting sleeves, thick reinforcing bars, and temporary concrete-supported columns; among which: The grouting sleeve is embedded in the concrete main beam of the bridge, and the opening of the grouting sleeve protrudes downwards from the bottom of the main beam. The temporary concrete support column is installed close to the underside of the main beam; The lower part of the thick steel bar is vertically installed in the temporary concrete support column, while the upper part of the thick steel bar is inserted into the grouting sleeve through the opening of the grouting sleeve; the outer diameter of the thick steel bar and the inner diameter of the grouting sleeve are matched.

2. The temporary structure for continuous beam construction according to claim 1, wherein It also includes cement grouting material, which can be placed inside the grouting sleeve and filled after the thick steel bars are removed from the grouting sleeve; the cement grouting material is high-strength non-shrink cement grouting material.

3. The temporary structure for continuous beam construction according to claim 1, wherein There are two temporary concrete support columns, symmetrically arranged on both sides of the main beam.

4. The temporary structure for continuous beam according to any one of claims 1 to 3, characterized in that, The quantity of the thick steel bars is determined based on the horizontal force borne by the temporary fixed structure.

Images