CN212554340U - Combined core mould for prefabricating hollow slab beam - Google Patents

Abstract

The utility model discloses a combination formula mandrel for prefabricating hollow slab beam, including two first split type mandrels and a movable template, two all be equipped with the draw-in groove of mutually supporting on the first split type mandrel, movable template passes through draw-in groove and two the connection can be dismantled to first split type mandrel. The utility model discloses reequiping on traditional steel core mould basis, adopting movable template to cover integral mandrel upper portion, movable template size can be according to hollow plate roof beam boxlike structure size adjustment in order to satisfy template load demand. After the concrete strength of the precast hollow slab beam reaches the designed demolition strength, the movable type formwork is drawn out, the combined type core formwork is demolished simply and easily, and the formwork is demolished more conveniently.

Description

Combined core mould for prefabricating hollow slab beam

Technical Field

The utility model belongs to bridge construction field especially relates to a mould for prefabricated hollow slab roof beam.

Background

With the vigorous development of urban bridge, highway bridge and railway bridge engineering in China, the hollow plate girder bridge with light dead weight and large rigidity is widely applied.

In the construction of the hollow slab beam, the intermediate box type structure is adopted, the working environment of the common inner cavity is narrow, and the installation of the core mould is complicated. The traditional method adopts an integral template or an air bag type core mold for construction, and the integral template has the defects of complex installation process, high labor cost, slow construction progress and the like; the air bag type core mould is adopted, floating is easy to occur, the thickness of a top plate, the regularity of edges and corners and the like are not easy to control, and the construction quality is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome not enough and the defect mentioned in the above background art, provide a combination formula mandrel for prefabricating hollow slab beam that has construction quality height, efficient, advantage such as with low costs. In order to solve the technical problem, the utility model provides a technical scheme does:

the utility model provides a combination formula mandrel for prefabricating hollow slab beam, includes two first split type mandrels (steel mould) and a movable mould board (steel sheet), two all be equipped with the draw-in groove of mutually supporting on the first split type mandrel, movable mould board passes through draw-in groove and two the connection can be dismantled to first split type mandrel.

In the above-mentioned combined core mold, preferably, still include polylith second components of a whole that can function independently mandrel, polylith the second components of a whole that can function independently mandrel can be dismantled and locate between two first components of a whole that can function independently mandrel, the frame shape after first components of a whole that can function independently mandrel, second components of a whole that can function independently mandrel and movable template combination matches with the hollow structure shape of prefabricated hollow slab beam.

In the above-described combined core mold, preferably, the first split core mold and the second split core mold each extend inward along the edge of the combined core mold in the longitudinal direction to form a fixed longitudinal rib arranged in the longitudinal direction of the combined core mold, and the first split core mold and the second split core mold or the second split core mold and the second split core mold adjacent to each other are connected by a connecting assembly provided on the fixed longitudinal rib.

In the above-described assembled core mold, preferably, the end edges of the first and second divided core molds extend inward to form fixed ribs perpendicular to the longitudinal direction of the assembled core mold.

In the above-described combined core mold, it is preferable that a plurality of criss-cross reinforcing ribs are provided in the inner cavities of the first split core mold and the second split core mold.

In the above-described combined core mold, preferably, the movable mold plate is provided at the top of the combined core mold.

In the above-described combined core mold, preferably, the second divided core mold has three pieces.

The utility model discloses a combination formula mandrel is applicable to the cross-section and width size less, and middle box design is complicated, and the space is comparatively narrow and small, and inner box end position opening is little, the prefabricated construction of the narrow hollow slab roof beam of inner chamber.

The utility model discloses a combination formula mandrel replaces integral mandrel or gasbag formula mandrel, and great saving the cost of labor has improved production efficiency, gains better economic benefits and social to be favorable to providing the efficiency of construction to accord with safe civilization construction and energy-concerving and environment-protective requirement.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses a combination formula mandrel intensity and rigidity are high, and the main part adopts steel mould (first split type mandrel and second split type mandrel promptly) and steel sheet (movable template promptly), and the regularity of prefabricated hollow slab roof beam inner box room roughness, chamfer is controlled easily, construction quality is high.

2. The utility model discloses a when the installation of combination formula mandrel, can be without traditional artifical section fastening fastener in boring into the mandrel, realized that the outer whole fastening of mould is rectified, simplified construction process, it is little to have solved the opening of hollow slab beam inner box position, and the inner chamber is narrow, the artifical technical problem that installs the degree of difficulty and intensity of labour is big to improve efficiency, practiced thrift the labour.

3. The utility model discloses reequiping on traditional steel core mould basis, adopting movable template to cover integral mandrel upper portion, movable template size can be according to hollow plate roof beam boxlike structure size adjustment in order to satisfy template load demand. After the concrete strength of the precast hollow slab beam reaches the designed demolition strength, the connecting component (such as a U-shaped clamp) between the first split core mould and/or the second split core mould is unscrewed or demolished, the movable mould plate is drawn out, the demolition of the combined core mould is simple and easy, and the demolition is more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the combined core mold in the embodiment.

Fig. 2 is a schematic structural view of the assembled core mold without the movable mold plate in the embodiment.

Fig. 3 is a view of the second split core mold in the lower left direction in fig. 2, taken in the direction of the arrow in fig. 2.

Illustration of the drawings:

1. a first split mandrel; 2. a movable template; 3. a card slot; 4. a second split core mold; 5. fixedly connecting longitudinal rib plates; 6. fixedly connecting a transverse rib plate; 7. and a reinforcing rib plate.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.

Example (b):

as shown in fig. 1 to 3, the combined core mold for prefabricating a hollow slab beam according to the present embodiment includes two first split core molds 1 and one movable mold plate 2, wherein the two first split core molds 1 are respectively provided with a clamping groove 3, and the movable mold plate 2 is detachably connected to the two first split core molds 1 through the clamping grooves 3.

In this embodiment, three second split core molds 4 are included, the three second split core molds 4 are detachably provided between the two first split core molds 1, and the shape of the outer frame of the combination of the first split core mold 1, the second split core mold 4, and the movable mold plate 2 matches the shape of the hollow structure of the precast hollow slab beam.

In this embodiment, the edges of the first split core mold 1 and the second split core mold 4 in the longitudinal direction of the combined core mold extend inward to form fixed longitudinal ribs 5 arranged in the longitudinal direction of the combined core mold, and the adjacent first split core mold 1 and the second split core mold 4 or the second split core mold 4 and the second split core mold 4 are connected by a connecting assembly provided on the fixed longitudinal ribs 5.

In this embodiment, the end edges of the first split core mold 1 and the second split core mold 4 extend inward to form a fixed rib plate 6 perpendicular to the length direction of the combined core mold.

In this embodiment, a plurality of criss-cross reinforcing ribs 7 are provided in the inner cavities of the first split core mold 1 and the second split core mold 4.

In this embodiment, the movable mold plate 2 is provided on the top of the combined core mold.

The combined core mold for prefabricating the hollow slab beam can adopt a 50mm wide rib plate steel mold (namely, a first split core mold and a second split core mold in the embodiment) and a 5mm thick movable steel plate (namely, the movable mold plate in the embodiment), the depth of a clamping groove is reserved at the top of the steel mold and is 5mm, the steel plate is used for being laminated in the groove, and after the whole section of the steel mold is symmetrically installed in place, the movable steel plate falls into the clamping groove at one time, so that the combined core mold is integrally and rapidly erected, and a unified and integral combined core mold is formed. The length of the combined core mold can be 2000mm, and the combined core mold is connected by a bolt fastener. The two sides and the bottom of each section of steel die are connected by 4 connecting components (such as U-shaped clamps, connected by circular holes in figures 1-3).

Before construction, the position mark of the center line of the prefabricated hollow slab beam is calibrated in advance, the steel mould part of the combined core mould is firstly assembled in sections, and an installer can stand without drilling into the inner cavity of the core mould. And after the bottom and side steel moulds are installed and are corrected to be qualified, paving the movable steel plates, and checking that the plane position and the structure size of the combined core mould meet the design requirements, and then installing the subsequent outer templates, the steel bars and the like.

And during dismantling, after the concrete strength of the precast hollow slab beam reaches the designed dismantling strength, beginning the dismantling work of the combined core mold. Firstly, the connecting component of the end section steel mould and the bolt fastener at the section connecting part are unscrewed or dismantled, the movable steel plate is drawn out after a certain dismounting gap is generated, and then the built-in connecting component (such as a U-shaped clamp) is fastened by using a steel wire rope and can be easily pulled out of the prefabricated hollow plate girder, namely, the dismantling is realized.

Claims (7)

1. The utility model provides a combination formula mandrel for prefabricating hollow slab beam, its characterized in that includes two first split type mandrels (1) and a movable template (2), two all be equipped with mutually supported draw-in groove (3) on first split type mandrel (1), movable template (2) are through draw-in groove (3) and two the connection can be dismantled in first split type mandrel (1).

2. The combined core mold according to claim 1, further comprising a plurality of second split core molds (4), wherein the second split core molds (4) are detachably arranged between the two first split core molds (1), and the outer frame shape of the combined first split core mold (1), second split core mold (4) and movable mold plate (2) is matched with the hollow structure shape of the prefabricated hollow slab beam.

3. The combined core mold according to claim 2, wherein the edges of the first and second split core molds (1, 4) in the length direction of the combined core mold extend inward to form fixed longitudinal ribs (5) arranged in the length direction of the combined core mold, and the adjacent first and second split core molds (1, 4) or second split core molds (4, 4) are connected by connecting components provided on the fixed longitudinal ribs (5).

4. The modular core mold as claimed in claim 2, wherein the end edges of the first and second modular core molds (1, 4) are extended inward to form a fixing rib plate (6) perpendicular to the length direction of the modular core mold.

5. A modular core mould according to any of claims 1 to 4, characterised in that a plurality of criss-cross reinforcement ribs (7) are provided in the internal cavity of the first (1) and second (4) core mould.

6. A modular core mould according to any of claims 1-4, characterised in that the movable mould plate (2) is provided on top of the modular core mould.

7. A modular core mould according to any of the claims 2-4, characterised in that the second modular core mould (4) is provided with three blocks.

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