Construction device for preventing core mold from floating upwards for prefabricated box girder

Abstract

The utility model discloses a prefabricated box girder core mold floating prevention construction device which comprises a box girder pedestal, a core mold body for forming is arranged in the box girder pedestal, and a prefabricated box girder upper mold is arranged on the side wall of the box girder pedestal and located above the core mold body. A lower fixing part for fixing the top end of the core mold main body is arranged on the prefabricated box girder upper mold, and an upper fixing part for fixing the top end of the core mold main body is arranged on the prefabricated box girder upper mold. Therefore, the situation that the core mold body floats up and down in the pouring process can be avoided, the stabilizing effect is good, the product quality level can be effectively improved, meanwhile, the device is completely made of steel, machining is convenient, repeated turnover use can be achieved, mounting and dismounting are convenient, and the construction efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a core formwork floating prevention construction device for a prefabricated box beam. Background Art

[0002] With the development of infrastructure construction in my country, the production and manufacturing capacity of prefabricated components has been continuously improved, and the quality requirements of prefabricated component products in the highway construction market have been continuously improved, and the requirements for the cross-sectional size qualification rate of prefabricated box beam components have become more stringent. The pressure bar type used in previous construction to prevent the inner mold of the prefabricated box beam from floating up during the pouring process did not work well, and the cross-sectional size qualification rate index of the prefabricated components fluctuated, which restricted the improvement of the quality of prefabricated component products, resulting in problems such as excessive thickness of the bottom plate of the prefabricated box beam, insufficient thickness of the top plate, cracking of the top plate concrete, and exposed reinforcement.

[0003] Therefore, based on the above technical problems, it is necessary for technicians in this field to develop a prefabricated box girder core mold anti-floating construction device. Utility Model Content

[0004] The utility model aims to provide a construction device for preventing the core formwork from floating up of a prefabricated box beam.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model discloses a construction device for preventing core mold from floating up of prefabricated box beams, comprising a box beam pedestal, wherein a core mold body for forming is arranged inside the box beam pedestal, a prefabricated box beam upper mold is arranged on the side wall of the box beam pedestal and above the core mold body, an upper fixing component for fixing the top of the core mold body is arranged on the prefabricated box beam upper mold, and a lower fixing component for fixing the core mold body is also arranged on the inner wall of the box beam pedestal.

[0007] Furthermore, the upper fixed component includes a core mold holder, which is fixed to the bottom end of the outer wall of the prefabricated box girder upper mold and is located above the core mold body. The bottom end of the core mold holder abuts against the top end of the outer wall of the core mold body, and slots are provided on both sides of the outer wall of the box girder pedestal and at positions corresponding to the prefabricated box girder upper mold.

[0008] Furthermore, the inner walls of the slots are slidably connected with upper mold blocks, and the opposite ends of the upper mold blocks pass through the slots and are plugged into through holes opened on both sides of the outer walls of the prefabricated box girder upper mold. The top of the outer wall of the prefabricated box girder upper mold body is provided with a threaded outer cylinder.

[0009] Furthermore, the two opposite sides of the threaded outer cylinders are connected by a hexagonal block, and the outer walls on the opposite sides of the threaded outer cylinders are threadedly connected with fixed rods, and the ends of the fixed rods close to the threaded outer cylinders are provided with bidirectional threads, and the ends of the fixed rods away from the threaded outer cylinders are plugged into the two sides of the inner wall of the box beam pedestal.

[0010] Furthermore, both ends of the outer wall of the threaded outer cylinder are rotatably sleeved with a rotating fixed seat, the bottom end of the rotating fixed seat is fixed to the top end of the outer wall of the box beam pedestal, and the top end of the outer wall of the box beam pedestal and on both sides of the threaded outer cylinder are fixed with guide slides.

[0011] Furthermore, one end of the fixed rod away from the threaded outer cylinder is slidably connected to the inner wall of the guide slide, guide blocks are fixed to the front and rear sides of the inner wall of the guide slide, guide grooves are opened on the front and rear ends of the outer wall of the fixed rod, and the outer wall of the guide block is slidably connected to the inner wall of the guide groove.

[0012] Furthermore, the lower fixing component includes a pedestal protrusion, which is fixed to the bottom end of the inner wall of the box beam pedestal and located below the center of the core mold body. A placement groove is provided at the bottom end of the outer wall of the core mold body and at a position corresponding to the pedestal protrusion. A protrusion clamping plate is fixed to the bottom end of the inner wall of the core mold body and on both sides of the placement groove to fix the outer walls of the pedestal protrusion on both sides.

[0013] Furthermore, a protrusion long plate is provided at the bottom end of the inner wall of the core mold body and above the pedestal protrusion, and clamping blocks are fixed at the bottom end of the outer wall of the protrusion long plate and on both sides of the protrusion clamping plate. The bottom ends of the clamping blocks are abutted against the bottom end of the inner wall of the core mold body, and a fixing screw is fixed at the top end of the outer wall of the pedestal protrusion. The upper end of the fixing screw passes through the top end of the outer wall of the protrusion long plate and is threadedly connected with a locking nut.

[0014] Furthermore, the lower fixing component also includes a bottom connecting plate, the bottom end of the bottom connecting plate is fixed to the bottom of the front end of the outer wall of the box beam pedestal by fixing bolts, the upper end of the bottom connecting plate is provided with a pull hook, and the outer wall of the bottom connecting plate is provided with hook holes.

[0015] Furthermore, a fixed pull rod is fixed to the bottom end of the outer wall of the pull hook, the bottom end of the fixed pull rod is fixed to the hook hole, an upper connecting head is fixed to the end of the pull hook away from the fixed pull rod, and the upper end of the upper connecting head is fixed to the upper front end of the outer wall of the core mold body by bolts.

[0016] In the above technical scheme, the prefabricated box beam core mold floating prevention construction device provided by the utility model has the following beneficial effects:

[0017] In the utility model, the core mold body can be stably fixed in the box girder pedestal through the cooperation between the upper fixing component and the lower fixing component, thereby preventing the core mold body from floating up and down during the pouring process. The stabilizing effect is good and the product quality level can be effectively improved. At the same time, the device is made entirely of steel, which is convenient for processing, can be used multiple times, is easy to install and disassemble, and the construction efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the external structure in the front view direction of the prefabricated box beam core mold anti-floating construction device provided by the embodiment of the utility model;

[0020] Figure 2 A schematic diagram of a partial cross-sectional structure in the front view direction of a prefabricated box beam core mold anti-floating construction device provided by an embodiment of the utility model;

[0021] Figure 3 For the utility model embodiment Figure 1 The enlarged structural diagram at A in the middle;

[0022] Figure 4 For the utility model embodiment Figure 2 The enlarged structural diagram at B in the middle;

[0023] Figure 5 A schematic diagram of the three-dimensional structure of the long plate of the protrusion in the top view direction of the prefabricated box beam core mold floating prevention construction device provided by the embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the three-dimensional structure of the threaded outer cylinder and the fixed plug rod in the front view direction of the prefabricated box beam core mold floating prevention construction device provided by the embodiment of the utility model;

[0025] Figure 7 A schematic structural diagram of a guide slide in a side view direction of a prefabricated box girder core mold floating prevention construction device provided in an embodiment of the utility model.

[0026] In the figure: 100, box beam pedestal; 110, pedestal protrusion; 200, prefabricated box beam upper mold; 210, core mold holder; 220, threaded outer cylinder; 221, fixed plug rod; 222, rotating fixed seat; 223, hexagonal shift block; 224, guide slide; 300, core mold body; 310, protrusion clamping plate; 320, protrusion long plate; 321, clamping block; 330, fixing screw; 340, upper mold insert; 400, bottom connecting plate; 410, fixing bolt; 420, draw hook; 421, fixing pull rod; 430, upper connecting head. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] See also Figure 1 to Figure 7 As shown;

[0029] The utility model discloses a construction device for preventing core mold from floating up of a prefabricated box girder, comprising a box girder pedestal 100, wherein a core mold body 300 for forming is arranged in the box girder pedestal 100, a prefabricated box girder upper mold 200 is arranged on the side wall of the box girder pedestal 100 and above the core mold body 300, an upper fixing component for fixing the top of the core mold body 300 is arranged on the prefabricated box girder upper mold 200, and the upper fixing component comprises a core mold clamping seat 210, the core mold clamping seat 210 is fixed to the bottom end of the outer wall of the prefabricated box girder upper mold 200 and is located above the core mold body 300, and the prefabricated box girder upper mold 200 is arranged to press the top end of the outer wall of the core mold body 300 through the core mold clamping seat 210, and the bottom end of the core mold clamping seat 210 is fixed to the top end of the outer wall of the core mold body 300. The top of the outer wall of the core mold body 300 is abutted, and slots are provided on both sides of the outer wall of the box beam pedestal 100 and at positions corresponding to the precast box beam upper mold 200. The inner walls of the slots are slidably connected with upper mold plug-ins 340, and the opposite ends of the upper mold plug-ins 340 pass through the slots and are plugged into the through holes provided on both sides of the outer wall of the precast box beam upper mold 200. The slots are provided for inserting the upper mold plug-ins 340 on both sides of the outer wall of the box beam pedestal 100, and the upper mold plug-ins 340 are provided so that the opposite ends of the upper mold plug-ins 340 can be inserted into the through holes provided at both ends of the outer wall of the precast box beam upper mold 200 after being inserted into the slots, and through holes are provided at both ends of the precast box beam upper mold 200 at positions corresponding to the upper mold plug-ins 340.

[0030] The top of the outer wall of the prefabricated box girder upper mold 200 is provided with a threaded outer cylinder 220, and the two opposite sides of the threaded outer cylinders 220 are connected by a hexagonal shift block 223. The hexagonal shift block 223 is provided to facilitate personnel to turn the threaded outer cylinder 220 by a wrench. The outer wall of the opposite side of the threaded outer cylinder 220 is threadedly connected with a fixed plug rod 221. The end of the fixed plug rod 221 close to the threaded outer cylinder 220 is provided with a bidirectional thread. The bidirectional thread is provided to be connected with the inner wall of the threaded outer cylinder 220. The threaded connection enables the threaded outer cylinder 220 to drive the two fixed plug rods 221 to move relative to or in opposite directions at the same time when rotating, and the external threads on the outer walls of the two fixed plug rods 221 are arranged in opposite directions, and the ends of the fixed plug rods 221 away from the threaded outer cylinder 220 are plugged into the inner walls of the box beam pedestal 100 at both ends, and the inner walls of the box beam pedestal 100 are provided with fixed plug holes at positions corresponding to the fixed plug rods 221, and the two ends of the fixed plug rods 221 can be inserted into the fixed plug holes. The upper mold 200 of the prefabricated box beam is fixed again. The two ends of the outer wall of the threaded outer cylinder 220 are rotatably sleeved with a rotating fixed seat 222. The bottom end of the rotating fixed seat 222 is fixed to the top of the outer wall of the box beam pedestal 100. The rotating fixed seat 222 is provided to support the two ends of the threaded outer cylinder 220. The top of the outer wall of the box beam pedestal 100 and the two sides of the threaded outer cylinder 220 are fixed with a guide slide 224. The end of the fixed rod 221 away from the threaded outer cylinder 220 is fixed to the guide slide 2 The inner wall of the guide slide 224 is slidably connected, and the front and rear sides of the inner wall of the guide slide 224 are fixed with guide blocks. The front and rear ends of the outer wall of the fixed plug rod 221 are provided with guide grooves, and the outer wall of the guide block is slidably connected with the inner wall of the guide groove. The guide slide 224 and the guide block are provided to ensure that the fixed plug rod 221 can only slide left and right, and prevent the fixed plug rod 221 from rotating with the threaded outer cylinder 220, so as to ensure that the fixed plug rod 221 can normally extend and retract on the inner wall of the threaded outer cylinder 220;

[0031] The inner wall of the box girder pedestal 100 is also provided with a lower fixing component for fixing the core mold body 300, and the lower fixing component includes a pedestal protrusion 110, which is fixed to the bottom end of the inner wall of the box girder pedestal 100 and is located below the center of the core mold body 300, and a placement groove is provided at the bottom end of the outer wall of the core mold body 300 and at a position corresponding to the pedestal protrusion 110, and a protrusion clamping plate 310 for fixing the two sides of the outer wall of the pedestal protrusion 110 is fixed at the bottom end of the inner wall of the core mold body 300 and on both sides of the placement groove, and the placement groove is provided to enable the upper end of the pedestal protrusion 110 to be inserted into the interior of the core mold body 300, and the protrusion clamping plate 310 is provided to improve the clamping effect of the outer wall of the pedestal protrusion 110, and a protrusion is provided at the bottom end of the inner wall of the core mold body 300 and above the pedestal protrusion 110. The cam 320 is a block long plate 320, and the bottom end of the outer wall of the cam long plate 320 and the two sides of the cam clamping plate 310 are fixed with clamping blocks 321, the bottom ends of the clamping blocks 321 are abutted against the bottom end of the inner wall of the core mold body 300, and the cam long plate 320 is clamped on the outer wall of the cam clamping plate 310 through the clamping blocks 321, and the top end of the outer wall of the pedestal cam 110 is fixed with a fixing screw 330, the upper end of the fixing screw 330 passes through the top end of the outer wall of the cam long plate 320 and is threadedly connected with a locking nut, and the outer wall of the cam long plate 320 is provided with a through hole, and the worker can place the cam long plate 320 on the top end of the outer wall of the pedestal cam 110, and then take out the locking nut to fix the cam long plate 320 and the fixing screw 330, so that the cam long plate 320 can press the position of the core mold body 300;

[0032] The lower fixing member also includes a bottom connecting plate 400, the bottom end of the bottom connecting plate 400 is fixed to the bottom of the front end of the outer wall of the box beam pedestal 100 by a fixing bolt 410, and a hook 420 is arranged at the upper end of the bottom connecting plate 400, and the outer wall of the bottom connecting plate 400 is provided with a hook hole, and the bottom end of the outer wall of the hook 420 is fixed with a fixing rod 421, and the bottom end of the fixing rod 421 is fixed to the hook hole, and the end of the hook 420 away from the fixing rod 421 is fixed with an upper connecting head 430, and the upper connecting head 430 is fixed with a fixing rod 421. The upper end is fixed to the upper front end of the outer wall of the core mold body 300 by bolts. Specifically, personnel can fix the bottom connecting plate 400 to the front end of the outer wall of the box girder pedestal 100 by fixing bolts 410, and then fix the upper connecting head 430 to the front end of the outer wall of the core mold body 300 by bolts, and then hang the fixed pull rod 421 with the hook hole. In this way, the fixing effect of the core mold body 300 and the bottom end of the box girder pedestal 100 can be improved through the cooperation of the pull hook 420 and the bottom connecting plate 400.

[0033] In the utility model, ① the box beam pedestal 100 adopts high-strength I-beam, which is divided and manufactured into a base according to the size of the pedestal, and the base is installed according to the design drawings. After the installation is completed, a prefabricated box beam upper mold 200 is set on the top.

[0034] ② Then, before installing the prefabricated box girder upper mold 200, place the core mold body 300 sprayed with the release agent in the box girder pedestal 100 and install it in place. Then, use a gantry crane to hoist the prefabricated box girder bottom web steel frame into the inner wall of the box girder pedestal 100 and on the outside of the core mold body 300. Install protective layer high-strength mortar pads at a rate of 4 per m2, and make the bottom end of the core mold body 300 abut against the mortar pads.

[0035] ③ Then, a 32mm PVC round pipe hole is set every 2.5m along the center line of the box girder pedestal 100, and the protruding long plate 320 is taken out so that the bottom end of the protruding long plate 320 is pressed against the bottom end of the inner wall of the core mold body 300 through the clamping block 321, and then the locking nut is taken out and rotated into the fixing screw 330 to clamp the top of the protruding long plate 320, so that the core mold body 300 is tightly connected to the box girder pedestal 100, so as to better prevent the core mold body 300 from floating up during the box girder casting process, and effectively ensure the casting thickness of the box girder bottom plate, and then the bottom connecting plate 400 is taken out, and the bottom connecting plate 400 is fixed to the bottom of the outer wall of the box girder pedestal 100 by the fixing bolts 410, and the upper connecting head 430 is fixed to the front end of the outer wall of the core mold body 300 by bolts, and the fixing pull rod 421 is buckled with the hook hole, so that the bottom connecting plate 400 cooperates with the pull hook 420 to fix the core mold body 300 again.

[0036] ④ Then take out the upper mold block 340, and insert the upper mold block 340 into the slot opened on the side wall of the box beam pedestal 100, fix it from the side wall of the prefabricated box beam upper mold 200, and then use a wrench to insert the hexagonal shift block 223 to rotate the threaded outer cylinder 220, so that the threaded outer cylinder 220 rotates on the outer wall of the rotating fixed seat 222, so that the fixed plug rod 221 can be moved to both sides of the box beam pedestal 100 and inserted into the corresponding fixed sockets. The personnel can insert the fixed plug rod 221 into the fixed sockets in turn, so that the top of the prefabricated box beam upper mold 200 can be fixed again.

[0037] ⑤ The concrete pouring is divided into three times. The first pouring is to 20cm above the bottom plate chamfer, the second pouring is to 5cm above the web chamfer, and the third pouring is to the top plate of the box beam. The slump of concrete is controlled within the range of 180cm±20cm. The concrete is laid in horizontal layers and the inclined section is pushed forward. During the pouring process, pay attention to the symmetrical laying of the webs on both sides. After each layer of laying is completed, start the attached vibrating device.

[0038] ⑥ 8h-10h after the concrete pouring is completed, the device can be disassembled one by one.

[0039] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A prefabricated box girder core mold floating prevention construction device, comprising a box girder pedestal (100), wherein a core mold body (300) for forming is arranged inside the box girder pedestal (100), characterized in that: A prefabricated box girder upper mold (200) is arranged on the side wall of the box girder pedestal (100) and located above the core mold body (300); an upper fixing component for fixing the top of the core mold body (300) is arranged on the prefabricated box girder upper mold (200); the upper fixing component comprises a core mold holder (210); the core mold holder (210) is fixed to the bottom end of the outer wall of the prefabricated box girder upper mold (200) and located above the core mold body (300); the bottom end of the core mold holder (210) abuts against the top end of the outer wall of the core mold body (300). Slots are provided on both sides of the outer wall of the box beam pedestal (100) and at positions corresponding to the prefabricated box beam upper mold (200), and the inner walls of the slots are slidably connected with upper mold plugs (340), and the opposite ends of the upper mold plugs (340) pass through the slots and are plugged into through holes provided on both sides of the outer wall of the prefabricated box beam upper mold (200), and the top of the outer wall of the prefabricated box beam upper mold (200) is provided with a threaded outer cylinder (220), and the inner wall of the box beam pedestal (100) is also provided with a lower fixing component for fixing the core mold body (300).

2. The prefabricated box beam core mold anti-floating construction device according to claim 1 is characterized in that: The two opposite sides of the threaded outer cylinders (220) are connected by a hexagonal block (223), and the outer wall of the opposite side of the threaded outer cylinder (220) is threadedly connected with a fixed plug rod (221), and the end of the fixed plug rod (221) close to the threaded outer cylinder (220) is provided with a bidirectional thread, and the end of the fixed plug rod (221) away from the threaded outer cylinder (220) is plugged into the inner wall of the box beam pedestal (100) on both sides.

3. The prefabricated box beam core mold floating prevention construction device according to claim 2 is characterized in that: Both ends of the outer wall of the threaded outer cylinder (220) are rotatably sleeved with a rotatable fixed seat (222), the bottom end of the rotatable fixed seat (222) is fixed to the top end of the outer wall of the box beam pedestal (100), and guide slides (224) are fixed to the top end of the outer wall of the box beam pedestal (100) and on both sides of the threaded outer cylinder (220).

4. The prefabricated box beam core mold floating prevention construction device according to claim 3 is characterized in that: One end of the fixed rod (221) away from the threaded outer cylinder (220) is slidably connected to the inner wall of the guide slide (224), and guide blocks are fixed to the front and rear sides of the inner wall of the guide slide (224). The front and rear ends of the outer wall of the fixed rod (221) are provided with guide grooves, and the outer wall of the guide block is slidably connected to the inner wall of the guide groove.

5. The prefabricated box beam core mold floating prevention construction device according to claim 1 is characterized in that: The lower fixing component includes a pedestal protrusion (110), and the pedestal protrusion (110) is fixed to the bottom end of the inner wall of the box beam pedestal (100) and is located below the center of the core mold body (300). A placement groove is provided at the bottom end of the outer wall of the core mold body (300) and at a position corresponding to the pedestal protrusion (110). The bottom end of the inner wall of the core mold body (300) and both sides of the placement groove are fixed with protrusion clamping plates (310) for fixing the two sides of the outer wall of the pedestal protrusion (110).

6. The prefabricated box beam core mold floating prevention construction device according to claim 5 is characterized in that: A protrusion long plate (320) is arranged at the bottom end of the inner wall of the core mold body (300) and above the pedestal protrusion (110); clamping blocks (321) are fixed at the bottom end of the outer wall of the protrusion long plate (320) and on both sides of the protrusion clamping plate (310); the bottom ends of the clamping blocks (321) are in contact with the bottom end of the inner wall of the core mold body (300); a fixing screw (330) is fixed at the top end of the outer wall of the pedestal protrusion (110); the upper end of the fixing screw (330) passes through the top end of the outer wall of the protrusion long plate (320) and is threadedly connected with a locking nut.

7. The prefabricated box beam core mold floating prevention construction device according to claim 6 is characterized in that: The lower fixing component also includes a bottom connecting plate (400), the bottom end of which is fixed to the bottom front end of the outer wall of the box beam pedestal (100) by means of fixing bolts (410), a draw hook (420) is provided at the upper end of the bottom connecting plate (400), and hook holes are provided on the outer wall of the bottom connecting plate (400).

8. The prefabricated box beam core mold floating prevention construction device according to claim 7 is characterized in that: A fixed pull rod (421) is fixed to the bottom end of the outer wall of the pull hook (420), and the bottom end of the fixed pull rod (421) is fixed to the hook hole. An upper connecting head (430) is fixed to the end of the pull hook (420) away from the fixed pull rod (421), and the upper end of the upper connecting head (430) is fixed to the upper front end of the outer wall of the core mold body (300) through bolts.

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