CN211662294U

CN211662294U - Simple core mold for bridge precast hollow slab

Info

Publication number: CN211662294U
Application number: CN201922370851.6U
Authority: CN
Inventors: 孙贻国; 田连民; 宋二龙; 唐刚祥; 赵永旭; 苟笑声
Original assignee: Road and Bridge International Co Ltd; China Communications Road and Bridge North China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; China Communications Road and Bridge North China Engineering Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-10-13
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to a simple and easy mandrel of bridge hollow core slab, including 3 at least supports, the support is the same but area is less than the frame of hollow core slab hollow cross section of a peripheral profile and hollow core slab hollow cross section profile, and each support equidistant setting and axle center coincidence hug closely the steel pipe that the support periphery set up the one deck cross section for the rectangle, encircle the many ligatures areas of steel pipe outer wall ligature with each steel pipe cramp to wrap up at least one deck plastic film on steel pipe outer wall. The utility model discloses a rectangular pipe and reinforcing bar commonly used of job site, it is with low costs, can make in a large number, under the big condition of hollow slab processingquantity, can accelerate the construction progress, can guarantee hollow slab finished product quality simultaneously.

Description

Simple core mold for bridge precast hollow slab

Technical Field

The utility model relates to a bridge hollow core slab construction technical field, concretely relates to a simple and easy mandrel for pouring bridge hollow core slab.

Background

When the bridge precast hollow slab is poured, a core mold is arranged in the middle of the bridge precast hollow slab to form a hollow structure. The core mold is usually customized by professional template manufacturers, the cost is high, and the number of customized products for each project is limited. After the concrete pouring of the hollow slab is finished, the formwork can be detached after the concrete reaches a certain strength, so that the turnover rate of the core formwork is low, and the number of the core formworks is small, so that the project with large processing amount and short construction period of the hollow slab can be seriously restricted on the project progress.

Disclosure of Invention

The utility model aims at providing a simple and easy mandrel to the problem that current hollow core slab mandrel is with high costs, can adopt a large amount of preparation of low-cost material, under the prerequisite of guaranteeing hollow core slab construction quality for the construction progress.

The technical scheme of the utility model as follows:

the utility model provides a simple and easy mandrel of bridge hollow core slab which characterized in that: including 3 at least supports, the support is the same but area is less than the frame of hollow slab hollow cross section of a peripheral profile and hollow slab hollow cross section profile, and each support equidistant setting and axle center coincidence encircle and hug closely the support periphery and set up the steel pipe that the one deck cross section is the rectangle, encircle many ligatures areas of steel pipe outer wall ligature with each steel pipe cramp to wrap up at least one deck plastic film on the steel pipe outer wall.

The utility model discloses a rectangular pipe and reinforcing bar preparation commonly used at the job site, the material is simple, and is with low costs, can make in a large number to easy dismounting, under the big condition of hollow slab processingquantity, adopt in a large number the utility model discloses can accelerate the construction progress, can guarantee hollow slab finished product quality simultaneously and reach the standard requirement.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention;

fig. 2 is a schematic longitudinal sectional structure of the present invention;

fig. 3 is a schematic view showing a structure of a holder in the core mold;

FIG. 4 is a schematic view of the state of the present invention on the jig frame;

fig. 5 is a schematic view of the usage state of the present invention.

Detailed Description

As shown in fig. 1 and 2, the present invention comprises at least 3 supports 1, and the structure of the support 1 is as shown in fig. 3, and is a frame having a peripheral contour the same as the contour of the hollow cross section of the hollow slab but having an area smaller than the hollow cross section of the hollow slab. The supports are arranged at equal intervals, the axes of the supports are overlapped, the supports are tightly attached to and surround the periphery of the supports to form a layer of steel pipe 2 with a rectangular cross section, a plurality of binding belts 3 for binding the steel pipes are bound around the outer walls of the steel pipes 2, and at least one layer of plastic film is wrapped on the outer walls of the steel pipes.

The utility model discloses during the implementation, support 1 can adopt the steel bar welding to form.

As shown in fig. 4, the utility model discloses during the preparation, earlier with a steel bar welding bed-jig 4, the bottom and both sides of bed-jig are the same with hollow bottom and both sides profile of hollow slab, lay one deck steel pipe 2 bottom the bed-jig, prop up a plurality of 1 vertical equidistance of support and establish on the bottom steel pipe, then encircle and hug closely the peripheral densely covered steel pipe of laying of support, after the steel pipe installation is accomplished, it is fixed with steel pipe ligature with group ribbon 3, wrap up the plastic film again in the steel pipe periphery, the mandrel is the completion of making promptly.

As shown in fig. 5, will the utility model discloses hang on the framework of steel reinforcement of hollow core slab, after the installation external mold, pour hollow core slab concrete 5. And after the concrete reaches the form removal strength, pulling down the support 1 in the core mould by using an iron hook, collapsing the core mould structure, and drawing out the steel pipe to finish the form removal. The plastic film wrapped outside the core mold can not only ensure that slurry does not leak during pouring, but also ensure that the inner wall of the hollow slab is smooth, and improve the quality of the hollow slab.

Claims

1. The utility model provides a simple and easy mandrel of bridge hollow core slab which characterized in that: including 3 at least supports, the support is the same but area is less than the frame of hollow slab hollow cross section of a peripheral profile and hollow slab hollow cross section profile, and each support equidistant setting and axle center coincidence encircle and hug closely the support periphery and set up the steel pipe that the one deck cross section is the rectangle, encircle many ligatures areas of steel pipe outer wall ligature with each steel pipe cramp to wrap up at least one deck plastic film on the steel pipe outer wall.