CN110939064A

CN110939064A - Method for quickly removing continuous beam pier and beam consolidation

Info

Publication number: CN110939064A
Application number: CN201911132128.2A
Authority: CN
Inventors: 宋伟俊; 陈鑫; 蒋旺; 郑森; 唐小军; 刘伊; 张亚锋; 任延龙
Original assignee: China Railway Construction Bridge Engineering Bureau Group Co Ltd; China Railway Construction Corp Ltd CRCC
Current assignee: China Railway Construction Bridge Engineering Bureau Group Co Ltd; China Railway Construction Corp Ltd CRCC
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-03-31

Abstract

The invention provides a method for quickly removing the consolidation of a continuous beam pier and a beam, which comprises the steps of chiseling concrete at the connecting part of a beam body and a support until reinforcing steel bars leak out; then installing a cutting device, and cutting the steel bars and the support; and then chiseling the residual part of the pier beam fixedly connected on the beam body, and cleaning after chiseling. And repeating the steps, and cutting other pillars until the consolidation of the pier beam is completely removed. The method adopts the chain saw for static cutting, has small amplitude and cannot influence the beam body structure; meanwhile, the construction method is flexible, has small requirement on operation space, has small dependence on manpower, is quick and efficient in construction process, and has good economic and social benefits.

Description

Method for quickly removing continuous beam pier and beam consolidation

Technical Field

The invention belongs to the technical field of large-scale bridge continuous beam construction, and particularly relates to a method for quickly removing pier-beam consolidation of a continuous beam.

Background

With the rapid development of economy and society in China, infrastructure construction changes day by day, bridge construction technology is continuously improved, in sections with limited natural conditions, partial sections with larger span adopt a continuous beam hanging basket construction process, pier beam temporary consolidation is an important link for ensuring construction stability, and temporary consolidation and dismantling also become important components of bridge construction. The traditional temporary consolidation dismantling method comprises the following steps: the temporary consolidation of the electrolytic sulfur mortar is removed, the temporary consolidation is removed by using a sand cylinder, and the temporary consolidation is removed by using an air pick removing method. The method for removing the temporary consolidation by electrolyzing the sulfur mortar is influenced by factors such as a sulfur mortar formula, long-time exposure weathering, easy failure of electrolytic resistance and the like, and the temporary consolidation cannot be completely melted; the temporary consolidation is removed by using the sand cylinder, and the stability and the synchronous removal of a plurality of concretions of the sand discharged from the sand cylinder are difficult to ensure due to the existence of the friction force of the gravel; the conventional pneumatic pick removing method removes temporary consolidation, workers need to hold the pneumatic pick to chisel the temporary consolidation part, the safety of high-altitude operation is poor, and the removing time is long. Therefore, the construction method in the prior art generally has the following defects: 1. a temporary consolidation release failure may occur. 2. The dependence on manual operation is high. 3. A large amount of aloft work is performed, and the safety is poor. 4. Long release time and poor economic benefit.

Disclosure of Invention

In view of the above, the invention provides a method for rapidly removing continuous beam pier-beam consolidation, aiming at overcoming the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method for quickly removing the consolidation of a continuous beam pier beam comprises the following steps:

s1, chiseling concrete at the connecting part of the beam body and the support column until the steel bars leak out;

s2, installing a cutting device, and cutting the steel bars and the support;

s3, chiseling the residual part of the pier beam fixedly connected on the beam body;

s4, cleaning and polishing the bonding part at the bottom of the beam body, and flattening the damaged part;

and S5, repeating the steps, and cutting other pillars until the pier beam consolidation is completely released.

Further, in step S2, the cutting device cuts the chain saw using reinforced concrete.

Further, the reinforced concrete cutting chain saw is hydraulically driven.

Further, the damaged part of the bottom of the beam body is filled with high-performance epoxy mortar.

Further, in step S2, the cutting device cuts along the bottom curve of the beam body.

Further, in step S2, the cutting device cuts from the inside to the outside along the bottom curve of the beam body.

Compared with the prior art, the invention has the following advantages:

the method adopts the chain saw for static cutting, has small amplitude and cannot influence the beam body structure; meanwhile, the construction method is flexible, has small requirement on operation space and small dependence on workers, avoids high-altitude operation, has high safety and saves labor cost; the construction process is rapid and efficient, and good economic and social benefits are achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

fig. 1 is a schematic structural diagram of the invention.

Description of reference numerals:

1-reinforcing steel bars; 2-beam and pillar connection.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A method for rapidly removing the consolidation of a continuous beam pier beam, as shown in figure 1,

the method comprises the following steps:

firstly, chiseling concrete at a connecting part 2 of a beam body and a support column until the concrete leaks out of a reinforcing steel bar 1 at the connecting part of the pier beam, the beam body and the support column; in the method, when the concrete of the connecting part is chiseled, the steel structure (the steel bar part) does not need to be further processed, specifically, the concrete can be chiseled manually or by the existing equipment, the operation is flexible, the limiting conditions are few, and the implementation is easy;

then, installing a cutting device, and cutting the leaked steel bars and the main structure of the support column in the arrangement S1; when the steel structure upright post is adopted by the support post, the steel structure upright post needs to be cut in the step;

then, chiseling the residual part of the pier beam fixedly connected on the beam body; cleaning and polishing the bonding part at the bottom of the beam body, and filling the damaged part; preferably, the damaged part at the bottom of the beam body can be filled with high-performance epoxy mortar;

then, the steps are repeated, and other pillars are cut until the pier beam consolidation is completely released.

In step S2, the cutting device cuts the chain saw using reinforced concrete. Generally, the reinforced concrete cutting chain saw employs a diamond chain saw driven by hydraulic pressure. The box girder temporary consolidation concrete can be stably and undisturbed cut by hydraulically driving a chain saw to perform cutting action; and can be remotely controlled through a high-pressure oil pipe, and the operation process is safe and convenient.

In step S2, the cutting device cuts along the bottom curve of the beam. In a further preferred embodiment, the cutting device cuts from the inside to the outside along the bottom curve of the beam.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. A method for rapidly removing the consolidation of a continuous beam pier beam is characterized in that,

the method comprises the following steps:

s2, installing a cutting device, and cutting the steel bars and the support;

s5, cleaning and polishing the bonding part at the bottom of the beam body, and flattening the damaged part;

and S6, repeating the steps, and cutting other pillars until the pier beam consolidation is completely released.

2. The method for rapidly relieving the continuous beam pier beam consolidation according to claim 1, wherein the method comprises the following steps: in step S2, the cutting device cuts the chain saw using reinforced concrete.

3. The method for rapidly relieving the continuous beam pier beam consolidation according to claim 2, wherein the method comprises the following steps: the reinforced concrete cutting chain saw is driven by hydraulic pressure.

4. The method for rapidly relieving the continuous beam pier beam consolidation according to claim 1, wherein the method comprises the following steps: and (4) filling the damaged part at the bottom of the beam body with high-performance epoxy mortar.

5. The method for rapidly relieving the continuous beam pier beam consolidation according to claim 1, wherein the method comprises the following steps: in step S2, the cutting device cuts along the bottom curve of the beam.

6. The method for rapidly relieving the continuous beam pier beam consolidation according to claim 1 or 5, wherein the method comprises the following steps: in step S5, the cutting device cuts from the inside to the outside along the bottom curve of the beam.