CN110863422A

CN110863422A - Tool type overturn-preventing reinforcing device for precast concrete box girder with anti-collision wall

Info

Publication number: CN110863422A
Application number: CN201911174136.3A
Authority: CN
Inventors: 成针; 陈晋; 王星; 沈正京
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-03-06

Abstract

The invention relates to a tool type overturn-preventing reinforcing device for a precast concrete box girder with an anti-collision wall, which comprises a limiting member, a supporting member and a protecting member, wherein the limiting member is fixed at a stop block of a cover beam through a limiting steel bar, a transverse bearing plate is welded on the side surface of the limiting member, a T-shaped supporting member is welded at the upper end of the limiting member, a T-shaped support is welded between the lower surface of the transverse bearing plate and the side surface of the limiting member, a vertical supporting member and a protecting member are welded on the transverse bearing plate, and the heights of the vertical supporting member and the protecting member are determined according to the actual distance between the transverse supporting steel plate and the anti-collision wall after an. The temporary support system composed of the limiting component and the support component can prevent the overturn phenomenon of the upper anti-collision wall in the construction process, improve the construction quality, effectively protect the upper structure and save the construction cost.

Description

Tool type overturn-preventing reinforcing device for precast concrete box girder with anti-collision wall

Technical Field

The invention relates to a concrete box girder overturn-preventing reinforcing device, in particular to a tool type overturn-preventing reinforcing device.

Background

At present, the upper structure of an approach bridge of a cable-stayed bridge with a double-tower single-cable-plane steel structure adopts a simply supported and continuously prefabricated small box girder. The small box girder is divided into two spans of 28m and 30m, the height of the girder is 1.6m, the width of a single bridge is 16mm, the width of a prefabricated side girder is 2.7m, and the anti-collision wall with the width of 1.072m is provided. After the hoisting of the box girder is completed, in the construction processes of wet joints of bridge deck, expansion joints, bridge deck pavement and the like, in order to avoid the damage or the falling off of side beams and anti-collision walls caused by irregular construction, mechanical collision and the like, supporting and reinforcing measures are taken below the box girder, but other reinforcing measures need to harden the construction site, so that the project cost is greatly increased, and the construction period of the current stage is influenced. Therefore, a supporting system needs to be formed by relying on the lower cover beam and the performance of the component, and the side beam and the side anti-collision wall of the side beam are effectively supported. Simultaneously because convenient for obtaining materials, the installation is torn open simply, repeatedly usable's characteristics greatly practice thrift construction cost for the construction progress, the effectual construction risk of avoiding.

Disclosure of Invention

The invention mainly solves the problem that the precast concrete box girder on the side of an anti-collision wall is damaged due to improper construction or mechanical equipment collision in the construction process of the box girder, and provides a tool type overturn-preventing reinforcing device for the precast concrete box girder with the anti-collision wall.

The technical scheme of the invention is as follows: the tool type overturn-preventing reinforcing device comprises a limiting member, a supporting member and a protecting member, wherein the limiting member is fixed at a stop block of a cover beam through a limiting steel bar, a transverse bearing plate is welded on the side face of the limiting member, a T-shaped supporting member is welded at the upper end of the limiting member, a T-shaped support is welded between the lower face of the transverse bearing plate and the side face of the limiting member, a vertical supporting member and a protecting member are welded on the transverse bearing plate, and the height of the vertical supporting member and the height of the protecting member are determined according to the actual distance between a transverse supporting steel plate and an anti-collision wall after an upper small box beam is hoisted in place.

Furthermore, the limiting member is composed of an inverted concave limiting steel plate, the supporting member is composed of I-shaped steel, and the protecting member is composed of an I-shaped steel supporting piece and a rubber protecting plate.

Furthermore, a rubber protection plate is attached to the inner wall of the inverted concave limiting steel plate.

Furthermore, the same bent cap forms a supporting system through at least two tool type overturn-preventing reinforcing devices for the precast concrete box girder with the anti-collision wall.

The beneficial results of the invention are: through installing the braced system who constitutes in the bent cap, the effectual harm of avoiding crashproof wall to drop and bringing has played the support guard action to whole roof beam body structure. Meanwhile, the device is convenient to obtain materials, the using amount is extremely small, the installation and the disassembly are simple and easy, the repeated use can be realized, the construction cost is greatly saved, the construction progress is accelerated, the quality of the main structure is ensured, and the danger possibly brought in the cross operation is effectively avoided.

Drawings

FIG. 1 is a three-dimensional schematic view of the apparatus of the present invention;

FIG. 2 is a three-dimensional view of a stop member;

FIG. 3 is a three-dimensional view of the support member;

FIG. 4 is a support member floor plan;

FIG. 5 is a support member elevational view;

fig. 6 is a top view of the support member.

Detailed Description

The following further describes the method for implementing the present invention with reference to specific examples. It should be understood that these examples are only for illustrating the present patent and are not intended to limit the scope of the present patent. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the present patent teaching, and such equivalents may fall within the scope of the invention defined by the appended claims.

As shown in fig. 1 to 6, the reinforcing apparatus for preventing a precast concrete box at an impact wall side of the present invention mainly includes three major parts, a limiting member, a supporting member and a protecting member. The limiting member is fixed at the stop block of the cover beam through a limiting steel bar 8, a transverse bearing plate 3 is welded on the side face of the limiting member, a T-shaped support member 2 is welded at the upper end of the limiting member, a T-shaped support 4 is welded between the lower face of the transverse bearing plate 3 and the side face of the limiting member, a vertical supporting member and a protection member are welded on the upper face of the transverse bearing plate 3, and the height of the vertical supporting member and the height of the protection member are determined according to the actual distance between the transverse supporting steel plate and the anti.

The limiting component is composed of an inverted concave limiting steel plate 1, the supporting component is composed of an I-shaped steel 5, and the protecting component is composed of an I-shaped steel supporting piece 6 and a rubber protecting plate 7. The inner wall of the inverted concave limiting steel plate 1 is pasted with a rubber protective plate 7. The same bent cap forms a supporting system through at least two tool type overturn-preventing reinforcing devices for the precast concrete box girder with the anti-collision wall.

After the bent cap strength reaches the design requirement, install protection component and stop member in bent cap dog department to stabilize stop member through the welding restriction reinforcing bar, can weld earlier the supporting steel sheet simultaneously, after the hoisting of box girder is accomplished, according to the protection component of actual difference in height welding vertical steel shotcrete and box girder bottom.

The specific operation method of the invention comprises the following steps:

1. the limiting steel component is processed independently, the supporting plate is welded at the matching position of the limiting steel component preferentially, the component is processed on a leveling field, and the precision of the matching component is checked by utilizing a leveling steel plate.

2. After the strength of the bent cap concrete reaches the design requirement, a rubber plate (a protective component) is firstly installed at the bent cap stop block, meanwhile, a limiting component is installed on the surface of the protective component, and reinforcing steel bars are welded and fixed on two sides of the limiting component.

3. And after the small box girder is hoisted in place, the height of the supporting steel plate and the height of the side bottom plate of the anti-collision wall are measured, and the length of the vertical I-shaped steel is adjusted according to the actual height.

4. And a rubber plate (a protective component) is welded at the top of the vertical I-shaped steel, and the bottom of the vertical I-shaped steel is in full-welding connection with the supporting steel plate and is propped against the bottom of the anti-collision wall.

5. The same section of box girder can be combined by a plurality of devices, generally two, and the connected devices can be welded by steel pipes.

6. After the construction of one section box girder is completed, the overturn preventing device can be detached for the construction of the next section.

Claims

1. The utility model provides a reinforcing apparatus that topples is prevented to be used for taking crashproof wall precast concrete case roof beam instrument formula, includes stop component, supporting member, guard member, its characterized in that: the limiting member is fixed at a stop block of the cover beam through a limiting steel bar, a transverse bearing plate is welded on the side face of the limiting member, a T-shaped support is welded at the upper end of the limiting member, a T-shaped support is welded between the lower face of the transverse bearing plate and the side face of the limiting member, a vertical supporting member and a protecting member are welded on the transverse bearing plate, and the heights of the vertical supporting member and the protecting member are determined according to the actual distance between the transverse supporting steel plate and the anti-collision wall after the upper small box girder is hoisted in.

2. The tool type overturn-preventing reinforcing device for the precast concrete box girder with the anti-collision wall as claimed in claim 1, is characterized in that: the limiting component is composed of an inverted concave limiting steel plate, the supporting component is composed of I-shaped steel, and the protecting component is composed of an I-shaped steel supporting piece and a rubber protecting plate.

3. The tool type overturn-preventing reinforcing device for the precast concrete box girder with the anti-collision wall as claimed in claim 2, is characterized in that: and a rubber protective plate is pasted on the inner wall of the inverted concave limiting steel plate.

4. The tool type overturn-preventing reinforcing device for the precast concrete box girder with the anti-collision wall as claimed in any one of claims 1 to 3, wherein: the same capping beam forms a supporting system through at least two tool type overturn-preventing reinforcing devices for the precast concrete box beam with the anti-collision wall.