Precast beam pedestal with grout leakage prevention device

Abstract

The utility model relates to a precast beam pedestal with a slurry leakage prevention device, which solves the problem of slurry leakage between a beam plate pedestal and a side mould, two sides of the upper end of a concrete base are provided with symmetrical channel steels with outward openings, the upper surfaces of the two channel steels are connected with a steel panel, the steel panel is as wide as the concrete base, and grooves of rubber sealing strips are matched with the inner walls of the channel steels and the outer wall of the steel panel. The outer side faces of the rubber sealing strips are parallel to the inner side faces of the formworks, PVC pre-buried holes are pre-buried in the concrete base in the width direction, pull rods with threads at the two ends penetrate through the lower portions of the formworks on the two sides of the concrete base and the PVC pre-buried holes, and the formworks are tightly attached to the rubber sealing strips on the steel channels through pull rod nuts on the two sides.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of bridge superstructure beam slab prefabrication construction, and particularly relates to a prefabricated beam pedestal with a leakage-proof device. BACKGROUND

[0002] In the prefabrication of bridge superstructure beam slab, the beam slab pedestal is provided with a formwork on both sides as a side formwork, and the side formwork and the pedestal need to be fully sealed to prevent leakage. Since the formwork and the pedestal are rigid, measures must be taken to prevent leakage between them. In traditional construction, double-sided adhesive tape is used to seal the two sides of the beam slab pedestal. The conventional double-sided adhesive tape is relatively thin, and two layers of double-sided adhesive tape are used to ensure that the gap between the formwork and the two sides of the pedestal is closed, thereby solving the leakage problem between the beam slab pedestal and the side formwork. However, this process is relatively complicated, the double-sided adhesive tape is prone to wrinkles when it is too long, the leakage-preventing effect is not good, the bottom end of the formed beam slab is not smooth, and the old double-sided adhesive tape on the formwork and the pedestal needs to be removed, which is a large amount of work, affects the construction efficiency, and increases the cost. SUMMARY

[0003] The utility model aims to provide a prefabricated beam pedestal with a leakage-proof device to ensure that there is no leakage between the beam slab pedestal and the side formwork.

[0004] The utility model is implemented as follows:

[0005] The concrete base 1 has two symmetrical channel steels 3 with openings on both sides of the upper end, the upper surfaces of the two channel steels are connected with steel panels 5, the steel panels are the same width as the concrete base, the grooves of the rubber sealing strips 4 are matched with the inner walls of the channel steels and the upper walls of the steel panels, the outer side surfaces of the rubber sealing strips perpendicular to the grooves are parallel to the inner side surfaces of the formworks 8, the concrete base has pre-buried holes 6 in the width direction, and threaded pull rods 2 pass through the lower parts of the formworks on both sides of the concrete base and the pre-buried holes and make the formworks and the outer side surfaces of the rubber sealing strips tightly fit through pull rod nuts 7.

[0006] The utility model has the beneficial effects

[0007] The utility model is a device for preventing leakage during beam slab prefabrication. The two sides of the prefabricated pedestal are wrapped with rubber sealing strips, and the wrapped rubber sealing strips and the side formwork are in full and tight contact through the pull rod to prevent leakage during construction.

[0008] On the one hand, the rubber sealing strip has good elasticity, high strength, and good comprehensive performance. According to the construction requirements, oil-resistant, fire-resistant, oxidation-resistant, and ozone-resistant rubber can be used. Due to the good comprehensive performance, the rubber sealing strip can prevent the side formwork from being scratched and can be repeatedly used in different projects. Even if it is scrapped, it can be used in some other single or secondary projects, which reduces the construction cost.

[0009] In another aspect, the rubber seal can be provided in a whole strip shape according to the length of the pedestal, the whole seal has no joint, the concrete surface is smooth after pouring of the beam slab, thereby reducing the joint treatment.

[0010] The utility model discloses a structure form between the planar surface of beam slab side mould and the notch of pedestal upper portion side groove steel is combined ingeniously, utilizes the characteristic that rubber elasticity is good, adopts rubber seal edge covering, passes through the pull rod hole reserved at the bottom of beam pedestal, utilizes the pull rod to pull the side mould plate of both sides of pedestal, and the side mould extrudes the edge covering rubber seal of both ends of pedestal, and the edge covering rubber seal and side mould are in close contact fully, form the concrete position of better sealing property, coat release agent before pouring, and tear down the mould after the strength satisfies the design requirement, remove the residual slurry that sticks on it, and the prefabrication of next piece beam slab can be carried out. Operation is simple and convenient, and the appearance of beam slab is smooth after demoulding, and there is no edge defect and corner drop, and the integrity is good, which is favorable for improving engineering quality, speeding up construction progress, saving construction cost, and has greater popularization and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the structural diagram of the utility model.

[0012] Fig. 2 It is the axial side view of the utility model. DETAILED DESCRIPTION

[0013] The concrete pedestal 1 upper end both sides have the groove steel 3 that opens outward symmetry, the upper surface of two groove steels is connected with the steel panel 5, and the steel panel is equal width with the concrete pedestal, and the groove of rubber seal 4 cooperates with the upper inner wall of groove steel and the upper wall of steel panel, and the outer side of rubber seal vertical with groove is parallel with the inner side of mould plate 8, and the width direction has the embedded hole 6 in the concrete pedestal, and the pull rod 2 with screw thread at both ends passes through the lower part of mould plate of both sides of concrete pedestal and embedded hole, and makes the mould plate and the outer side of rubber seal tightly close through pull rod nut 7.

[0014] Figs. 1-2 An example of the utility model for beam slab prefabrication pedestal leakproof slurry device is shown. The assembly includes: a concrete pedestal 1, a pull rod 2, a groove steel 3, a rubber seal 4, a steel panel 5, a PVC embedded hole 6, a pull rod nut 7, and a mould plate 8.

[0015] The rubber seal 4 is arranged on the groove steel 3 at both sides of the upper end of the concrete pedestal 1, the groove steel 3 is provided with the steel panel 5, the PVC embedded hole 6 is embedded in the concrete pedestal 1, the pull rod 2 passes through the side mould plate 8 and the PVC embedded hole 6 at both sides of the concrete pedestal 1, and the side mould plate 8 and the rubber seal 4 on the groove steel 3 are tightly closed through the pull rod nut 7.

[0016] Thus, when the pull rod nuts 7 at both ends of the pull rod 2 are fastened, the side formworks 8 on both sides extrude the rubber sealing strips 4, so that the two are tightly fitted and a concrete position with good sealing is formed, and then the beam slab concrete can be poured.

[0017] The channel steel 3 is outwardly open, and the rubber sealing strip 4 is in the shape of the Chinese character "F", with the groove facing inward and the groove size being consistent with the thickness of the channel steel 3, so that good sealing can be ensured. The rubber sealing strip 4 and the opening of the channel steel 3 are oppositely arranged, so that the channel steel 3 and the rubber sealing strip 4 can be inlaid and the sealing effect can be achieved.

[0018] The pull rod 2 is provided with external threads at both ends, which are matched with the pull rod nuts 7. The pull rod 2 passes through the PVC pre-buried hole 6 pre-buried in the concrete base 1 and passes through the side formwork 8 of the beam slab formwork.

[0019] When the prefabricated beam pedestal with the anti-leakage slurry device is used to prefabricate the beam slab, the steel panel 5 on the concrete base 1 is used as the bottom die of the beam slab, the side formworks 8 on both sides of the beam slab pedestal are extruded against the rubber sealing strips 4 by fastening the pull rod nuts 7 at both ends of the pull rod 2, so that the two are tightly fitted and a concrete position with good sealing is formed. After the release agent is brushed, the beam slab concrete can be poured, and after the formwork is removed and the surface residual slurry is removed, the next piece of beam slab can be prefabricated.

Claims

1. A precast beam bench comprising a leakage preventing slurry device, characterized in that, Concrete base (1) upper two sides have opening to the outside symmetrical channel steel (3), two channel steel upper surface and steel panel (5) connection, steel panel and concrete base equal width, rubber seal (4) groove and channel steel upper inner wall, steel panel upper wall cooperation, rubber seal and groove perpendicular to the outside of the formwork (8) inner side parallel, concrete base width direction has pre-buried hole (6), both ends of threaded pull rod (2) through the concrete base both sides of the formwork lower part and pre-buried hole, and through pull rod nut (7) make formwork and rubber seal outside surface closely.

Images