Modular maintenance device on side end face of prefabricated box girder

Abstract

The utility model discloses a modular maintenance device on the side end face of a prefabricated box girder, and belongs to the technical field of prefabricated box girder machining and production auxiliary equipment. The device comprises a closed outer frame body, the front end side and the rear end side of the outer frame body are covered with waterproof cloth and a sponge mat respectively. Positioning bayonets are formed in the positions, corresponding to pre-tensioning steel bars of the prefabricated box girder, of the waterproof cloth and the sponge mat. A hook is arranged at the upper top of the outer frame body; the hook is detachably connected with a top sealing embedded steel bar on the top of the prefabricated box girder through a pull rope. The utility model effectively solves the problems of higher working cost and waste caused by incapability of repeated utilization when the front and rear end side surfaces of the prefabricated box girder are maintained by using equipment such as plastic films, geotechnical cloth or wet jute bags at present.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated box girder processing production auxiliary equipment technical field, concretely relates to a prefabricated box girder side end face's module type maintenance device. BACKGROUND

[0002] The prefabricated box girder still needs to maintain the front and rear side end faces of the box girder after completing prestressed tendon tensioning and grouting in the last construction stage, and the current maintenance means is mostly to use plastic film, geotextile or wet sack to cover on the end face directly to keep the surface of anchorage device and pressure grouting area humid, but the extension section of pre-tensioned reinforcement occupies a certain space, when covering the geotextile and other equipment on it, it is necessary to open a hole in advance according to the position of pre-tensioned reinforcement to avoid interference, but it will inevitably reduce the structural strength of geotextile at the hole position, and damage is easy to occur, so it can only be used as a disposable product most of the time, obviously, the above-mentioned maintenance means has the problems of high use cost, easy to produce excessive waste, the need for secondary processing and inability to be reused. SUMMARY

[0003] The utility model solves the technical problems that: provide a prefabricated box girder side end face's module type maintenance device to solve the problem of high work cost and waste caused by inability to be reused when using plastic film, geotextile or wet sack and other equipment to maintain the front and rear side end faces of the prefabricated box girder.

[0004] To solve the above problems, the utility model provides the following technical scheme:

[0005] A prefabricated box girder side end face's module type maintenance device, it includes the closed outer frame body, waterproof cloth and sponge pad are covered on the front and rear end sides of the outer frame body respectively, positioning sockets are arranged on the waterproof cloth and sponge pad at the positions corresponding to the pre-tensioned reinforcement of the prefabricated box girder, a hook is arranged on the top of the outer frame body, and the hook is detachably connected with the top sealing embedded reinforcement of the prefabricated box girder through a pull rope.

[0006] Preferably, the outer frame body includes two unit outer frame body structures with the same structure, and each unit outer frame body is a closed structure surrounded by a hollow steel pipe, the outline of which is consistent with the half profile shape along the center line of the prefabricated box girder, a connecting piece is arranged on the unit outer frame body near the center line of the prefabricated box girder, and the two unit outer frame bodies are detachably connected through the connecting piece.

[0007] Preferably, an inner frame body is arranged on the outer frame body at the position corresponding to the inner cavity of the prefabricated box girder, a door frame is hingedly installed on the inner frame body through a hinge, and the waterproof cloth and sponge pad at the door frame are independent of the outer frame body.

[0008] Preferably, waterproof cloth is arranged on the other end side of the sponge pad corresponding to the edge position of the outer frame body; the front and rear waterproof cloths are connected with the sponge pad and the outer frame body through the stainless steel wire.

[0009] Preferably, the positioning socket arranged on the waterproof cloth is in the shape of cross-cutting after the corresponding axis of the pre-tensioned steel bar.

[0010] Preferably, the positioning socket arranged on the sponge pad is a petal-shaped opening structure with a symmetry axis coinciding with the axis of the pre-tensioned steel bar.

[0011] Preferably, an extension rod is further arranged at the lower part of the outer frame body; a bandage is detachably arranged on the extension rod.

[0012] The beneficial effects of the utility model include the following points:

[0013] 1. Modularization and detachable design: the outer frame body is assembled by two units through a connecting piece, which can be quickly disassembled and spliced, significantly improving the device reuse rate and reducing the single construction cost.

[0014] 2. Precise positioning and structure reinforcement: cross-shaped and petal-shaped positioning sockets are arranged on the waterproof cloth and the sponge pad respectively, which not only provide the pre-tensioned steel bar with a guide for passing out but also maintain the integrity of the overall structure, avoiding the strength weakening problem caused by traditional hole cutting and prolonging the service life of the maintenance material.

[0015] 3. Multi-dimensional sealing and moisturizing: the waterproof cloth and the sponge pad form a double-layer protection structure, which, in combination with the stainless steel wire binding process, effectively blocks the evaporation of moisture, maintains a continuous humid environment for the anchorage device and the grouting area, and ensures the maintenance quality.

[0016] 4. Convenient installation and stable fixation: the top hook is connected with the pre-buried steel bar through a pull rope, and the bottom extension rod is fixed with a bandage, forming a double-restraint system to ensure the reliable installation of the device on the side surface of the box girder and avoid the problem of easy falling off of traditional covering materials.

[0017] 5. Convenience of internal cavity maintenance: the inner frame body is designed with a hinged door frame, which can be opened alone without removing the whole device, facilitating the inspection or secondary operation of the internal cavity of the box girder and realizing the synchronous promotion of maintenance and construction.

[0018] 6. Construction efficiency improvement: the quick assembly, precise alignment and repeated use of standardized modules significantly shorten the maintenance operation time, especially suitable for large-scale production of precast box girders and in line with the green construction concept.

[0019] The utility model solves the problems of high material loss, poor reusability and complicated operation in the traditional maintenance method, and provides an efficient, economical and sustainable technical solution for the end face maintenance of the precast box girder. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the plane structure schematic diagram after the embodiment of the utility model is placed on the prefabricated box girder;

[0021] Figure 2 is the plane schematic diagram of single outer frame body frame in the embodiment;

[0022] Figure 3 is the three-dimensional structure exploded schematic diagram of single unit outer frame and corresponding waterproof cloth and sponge pad in the embodiment;

[0023] Mark 1, outer frame body; 2, waterproof cloth; 3, sponge pad; 4, positioning socket; 5, hook; 6, inner frame; 7, door frame; 8, extension rod. DETAILED DESCRIPTION

[0024] The utility model will be further introduced below in combination with the drawings and specific embodiments:

[0025] Embodiment:

[0026] Referring to Figure 1 , the embodiment provides a modular maintenance device on the side end face of prefabricated box girder; it includes the closed outer frame body 1; waterproof cloth 2 and sponge pad 3 are covered respectively on the front and rear ends of the outer frame body 1; positioning socket 4 is arranged on waterproof cloth 2 and sponge pad 3 corresponding to the position of pre-tensioned reinforcement of prefabricated box girder; hook 5 is arranged on the upper top of outer frame body 1; hook 5 is detachably connected with the top embedded reinforcement of prefabricated box girder top through a pull rope.

[0027] The outer frame body 1 includes two unit outer frame body structures of the same structure, and the single unit outer frame body is a closed structure surrounded by hollow steel pipes; the contour is consistent with the half-side contour shape along the center line of the prefabricated box girder; a connecting piece is arranged on the unit outer frame body close to the center line of the prefabricated box girder; the two unit outer frame bodies are detachably connected through the connecting piece.

[0028] The inner frame 6 is arranged on the middle part of the outer frame body 1 corresponding to the position of the inner cavity of the prefabricated box girder; the door frame 7 is hingedly installed on the inner frame 6 through a hinge; the waterproof cloth 2 and the sponge pad 3 at the door frame 7 are independent of the outer frame body 1. The inner frame in the embodiment is fixed on the outer frame body by welding

[0029] The waterproof cloth 2 is also arranged on the other end side of the sponge pad 3 corresponding to the edge position of the outer frame body 1; the two waterproof cloths 2 in front and back bind the sponge pad 3 and the outer frame body 1 together through stainless steel wires.

[0030] The positioning socket 4 arranged on the waterproof cloth 2 is in the shape of cross cut at the axis corresponding to the pre-tensioned reinforcement.

[0031] The positioning slot 4 set on the sponge pad 3 is a petal-shaped opening structure with its axis of symmetry coinciding with the axis of the pre-stretched steel bar.

[0032] An extension rod 8 is also provided at the lower part of the outer frame 1; a strap is detachably provided on the extension rod 8. In this embodiment, the other end of the strap is connected to the support where the precast box girder is placed, thereby providing an inward pulling force to the bottom side of the outer frame, so that the sponge pad can be pressed tightly against the precast box girder.

[0033] When using the utility model device in this embodiment, the following process can be referred to:

[0034] 1. The two unit frames are spliced ​​together on the prefabrication site and connected by bolts or locating pins;

[0035] 2. Lift the device to the side end of the box girder, align it with the position of the pre-stretched steel bars, insert it horizontally for installation, and then connect the outer frame to the upper and lower sides of the precast box girder respectively through the top pull rope and the bottom binding strap.

[0036] 3. Spray water onto the sponge pad as needed to maintain the moisture of the end face through the double-layer structure of the waterproof cloth and the sponge pad.

Claims

1. A modular maintenance device for a precast box girder side end face, characterized by: It includes closed outer frame body (1); waterproof cloth (2) and sponge pad (3) are covered respectively on front and rear end sides of outer frame body (1); positioning socket (4) is arranged on waterproof cloth (2) and sponge pad (3) at the position corresponding to the pre-tensioned steel bar of precast box girder; hook (5) is arranged on the upper top of outer frame body (1); hook (5) is detachably connected with the top embedded steel bar of precast box girder through a pull rope.

2. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: The outer frame body (1) includes two unit outer frame body structures with the same structure, and each unit outer frame body is a closed structure surrounded by a hollow steel pipe; the contour is consistent with the half-side contour shape along the center line of the precast box girder; A connecting piece is arranged on the unit outer frame body near the center line of the precast box girder; the two unit outer frame bodies are detachably connected through the connecting piece.

3. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: An inner frame body (6) is arranged on the middle part of the outer frame body (1) corresponding to the position of the inner cavity of the precast box girder; a door frame (7) is hingedly installed on the inner frame body (6) through a hinge; the waterproof cloth (2) and the sponge pad (3) at the door frame (7) are independent of the outer frame body (1).

4. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: Waterproof cloth (2) is also arranged on the other end side of the sponge pad (3) corresponding to the edge position of the outer frame body (1); the two waterproof cloths (2) in front and back bind the sponge pad (3) and the outer frame body (1) together through stainless steel wire.

5. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: The positioning socket (4) arranged on the waterproof cloth (2) is in the shape of cross-cutting at the axis corresponding to the pre-tensioned steel bar.

6. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: The positioning socket (4) arranged on the sponge pad (3) is a petal-shaped opening structure with a symmetry axis coinciding with the axis of the pre-tensioned steel bar.

7. The modular maintenance device for the side end face of a precast box girder according to claim 1, characterized in that: An extension rod (8) is further arranged on the lower part of the outer frame body (1); a bandage is detachably arranged on the extension rod (8).

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