Formwork-removal-free chiseling prefabricating device for slot type cross beam
By combining dovetail grout-stopping strips, corrugated steel pipes, and capping steel plates, the problems of difficult removal of the inner formwork of slot-type crossbeams and time-consuming roughening were solved, achieving roughening without formwork removal and improving construction efficiency and economy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-03-20
AI Technical Summary
In the existing technology, the inner mold of the slot-type crossbeam is difficult to remove, and the roughening process is time-consuming and labor-intensive, resulting in poor economic efficiency.
The cavity inner mold is constructed using a combination of dovetail grout-stopping strips, corrugated steel pipes, and a capping steel plate. The corrugated steel pipes create a groove effect, which is then embedded and connected with the subsequently poured concrete, avoiding the difficulty of disassembling and assembling the inner mold. The surface is roughened by the grouting holes and grouting pipes on the capping steel plate.
This technology enables the slotted beams to be roughened without demolding, improving the efficiency of internal mold turnover and reducing construction costs and labor consumption.
Smart Images
Figure CN224012650U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a prefabrication device of slot type crossbeam, in particular to a disassembly-free form chiseling prefabrication device of slot type crossbeam. BACKGROUND
[0002] The lower module crossbeam is a slot type integral prefabricated crossbeam, six built-in cavities are reserved at the pile foundation position for forming post-poured joints, and the inner cavity concrete is post-poured after installation, so that the prefabricated crossbeam and the pile foundation form a stable connection.
[0003] In addition, the slot type crossbeam cavity inner wall needs to maintain roughness to form a good connection with the post-poured concrete bonding surface, and the general method is: first, manual mechanical chiseling after form removal, but the chiseling area of a single crossbeam reaches 42m2, the construction is time-consuming and laborious, the labor cost is high, and the chiseling quality control is difficult; second, a convex surface is added on the inner mold plate surface to form a concave-convex groove effect on the cavity inner wall, but the difficulty of removing the inner mold plate is increased. SUMMARY
[0004] The utility model solves the technical problem of the prior art and provides a disassembly-free form chiseling prefabrication device which is reasonable in design, convenient to disassemble and maintains the roughness of the slot type crossbeam.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A disassembly-free form chiseling prefabrication device of slot type crossbeam, characterized in that the device comprises a prefabrication base bottom mold, a plurality of cavity inner molds for supporting the slot type crossbeam are arranged on the top of the prefabrication base bottom mold, the cavity inner molds are arranged at intervals, each group of cavity inner molds comprises a corrugated steel pipe placed on the prefabrication base bottom mold and a top sealing steel plate placed on the top of the corrugated steel pipe, a crossbeam pouring cavity is arranged in the corrugated steel pipe, a dovetail stopper ring for sealing the crossbeam pouring cavity is arranged at the bottom of the corrugated steel pipe, a plurality of grouting holes are formed in the top sealing steel plate and communicate with the crossbeam pouring cavity, a grouting pipe is connected to the grouting hole, and an anchor bar is arranged on the top of the top sealing steel plate.
[0007] The technical problem solved by the utility model can also be solved by the following technical scheme, the prefabrication base bottom mold comprises an I-beam, a wood square and a bamboo plywood which are sequentially laid from bottom to top, the wood square is laid in at least two layers, and the wood squares of adjacent layers are vertically laid.
[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the precast platform bottom mold includes four I-beams laid at the bottom with a spacing of 850mm between them. A layer of horizontal timber is laid on top of the I-beams with a spacing of 430mm between them. A layer of vertical timber is laid on top of the horizontal timber with a spacing of 170mm between them. The horizontal and vertical timbers are tied together with thick iron wire and fixed with long nails. A 16mm thick bamboo plywood is laid on top of the vertical timber and fixed to the vertical timber with long nails.
[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the height of the dovetail anti-slurry strip ring is 25mm.
[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the cavity inner mold is provided with 6 molds, which are evenly distributed side by side on the precast platform bottom mold.
[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the top of the dovetail grout stop ring is provided with a groove that matches the corrugated steel pipe.
[0012] Compared with existing technologies, this utility model uses a combination structure of "dovetail grout-stopping strip + corrugated steel pipe + capping steel plate" as the inner mold of the cavity, and utilizes the corrugated steel pipe to form a groove effect, effectively embedding and connecting with the post-poured concrete, resulting in a strong bonding effect, while avoiding the difficulty of disassembling and assembling the inner formwork. The slot-type crossbeam prefabrication device of this utility model, which eliminates the need for formwork removal and roughening, has a simple principle, reasonable structure, and high efficiency in the turnover and use of the inner mold. Attached Figure Description
[0013] Figure 1 This is a structural diagram of the prefabrication device for slot-type crossbeams without demolding and roughening, as described in this utility model.
[0014] Figure 2 This is a structural diagram of the precast platform bottom mold.
[0015] In the diagram: 1-Precast platform bottom mold, 2-Dovetail grout stop ring, 3-Groove, 4-Corrugated steel pipe, 5-Top steel plate, 6-Grouting pipe, 7-Slot-type crossbeam, 8-Crossbeam casting cavity, 9-I-beam, 10-Transverse timber, 11-Vertical timber, 12-Bamboo plywood. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0017] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0018] Referring to Figure 1 And Figure 2 A slot type beam disassembly-free form chiseling prefabricating device, the device comprises a prefabricating base bottom die 1, a plurality of cavity inner dies for supporting the slot type beam are arranged on the top of the prefabricating base bottom die 1, the cavity inner dies are arranged at intervals, each group of cavity inner dies comprises a dovetail stop strip ring 2 arranged on the prefabricating base bottom die 1, a corrugated steel pipe 4 arranged on the dovetail stop strip ring 2 and a top sealing steel plate 5 arranged on the top of the corrugated steel pipe 4, the corrugated steel pipe 4 is internally provided with a beam pouring cavity 8, a plurality of grouting holes are formed in the top sealing steel plate 5 and are communicated with the beam pouring cavity, a grouting pipe 6 is connected at the grouting hole, and anchor bars are further arranged on the top of the top sealing steel plate 5; the height of the dovetail stop strip ring 2 is 25 mm; the cavity inner dies are six in number and are evenly and horizontally distributed on the prefabricating base bottom die 1; and the top of the dovetail stop strip ring 2 is provided with a groove 3 matched with the corrugated steel pipe.
[0019] The prefabricating base bottom die 1 comprises an I-shaped steel 9, a wood batten and a bamboo plywood 12 which are sequentially laid from bottom to top, the wood batten is at least laid in two layers, and the wood battens of adjacent layers are vertically laid, specifically,
[0020] The beam prefabricating base bottom die is used for bottom support and top leveling, the bottom die is composed of longitudinal I-shaped steel 9, transverse wood batten 10, longitudinal wood batten 11 and top bamboo plywood 12, and the process requirement of the beam side die "wall bottom" is also considered, and the flatness of the top of the prefabricating base bottom die after laying is not greater than 2 mm. The I-shaped steel, wood batten and bamboo plywood used can be recycled, and the economy is good.
[0021] Taking a 64#~65# berth as an example, according to the beam width requirement, four 25-meter long 20#a type I-shaped steels are arranged under each pier, the spacing is 850 mm, and the top is leveled when arranging, and the flatness deviation is not greater than 2 mm.
[0022] After the I-shaped steel is arranged, 100mm*100mm square wood with a spacing of 430mm and 50mm*100mm square wood with a spacing of 170mm are arranged on the upper layer respectively. The wood battens and the I-shaped steel are firmly bound by thick iron wires, and the upper and lower wood battens are fixed by long nails.
[0023] After the wood lattice is set, a layer of 16mm thick bamboo plywood is laid on the top, the width of the bamboo plywood is 2550mm, high 25mm dovetail stop grout strips are arranged on both sides, which play the effect of side formwork stop grout and forming the bottom of the beam without ribbing. The bamboo plywood is fixed on the bottom wood by long nails, and the top flatness is checked by using a ruler and is not greater than 2mm.
[0024] The installation process of the disassembly-free form chipping prefabricated device of the slot type beam is as follows:
[0025] When the rubber dovetail stop grout strip ring is placed on the prefabricated pedestal bottom form, the construction personnel place the corrugated steel pipe in the groove of the dovetail stop grout strip ring, when there is a gap between the corrugated steel pipe and the dovetail stop grout strip ring, polyurethane foam joint sealant can be used for sealing stop grout treatment to prevent the gap between the corrugated steel pipe and the dovetail strip from pouring into the concrete; the top elevation of all corrugated steel pipes is checked, and the top elevations of all steel pipes are kept consistent, and the deviation value is not greater than 3mm.
[0026] The top of the corrugated steel pipe is provided with a capping steel plate, the thickness of the steel plate is 20mm, the diameter is 1800mm, the top is provided with an anchor bar, and 3-4 grouting holes are formed in the middle, and a plastic corrugated pipe with an outer diameter of Φ200 is placed on each hole as a grouting channel for post-poured concrete.
[0027] When the capping steel plate is installed, an adjustable height positioning support is used to control the height of the steel plate, so that the heights of the six inner cavities of the beam are consistent, and the partial pile top and the top of the cavity are prevented from being not in contact and being suspended when the beam is installed and placed, at the same time, the top surface flatness of a single steel plate should be not greater than 3mm, and after the flatness is measured by using a level and a ruler and meets the above standard, the steel plate and the corrugated steel pipe can be welded together.
[0028] The top of the capping steel plate is provided with a grouting hole, and the grouting hole is arranged as follows:
[0029] The cavity node concrete is poured through the plastic corrugated pipe embedded in the beam, and the pump pipe diameter is generally 125-150mm, therefore, the diameter of the plastic corrugated pipe is selected to be 200mm.
[0030] According to the different types of straight pile and inclined pile cavity nodes, different hole positions are selected to ensure that there is always a hole for grouting and overflow regardless of the pile sinking deviation.
[0031] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A prefabrication device for slot-type crossbeams that does not require demolding and roughening, characterized in that, The device includes a precast platform bottom mold, with several hollow inner molds at the top of the precast platform bottom mold for supporting slotted crossbeams. The hollow inner molds are spaced apart. Each set of hollow inner molds includes a corrugated steel pipe placed on the precast platform bottom mold and a capping steel plate placed on top of the corrugated steel pipe. The corrugated steel pipe has a crossbeam casting cavity inside. The bottom of the corrugated steel pipe has a dovetail grout-stopping strip ring for sealing the crossbeam casting cavity. Several grouting holes communicating with the crossbeam casting cavity are opened on the capping steel plate. Grouting pipes are connected to the grouting holes. Anchor bars are also provided on the top of the capping steel plate.
2. The prefabrication device for slot-type crossbeams without demolding and roughening, as described in claim 1, is characterized in that... The precast platform base formwork includes I-beams, timber, and bamboo plywood laid sequentially from bottom to top. At least two layers of timber are laid, with adjacent layers of timber laid vertically.
3. The prefabrication device for slot-type crossbeams without demolding and roughening, as described in claim 2, is characterized in that... The precast platform base formwork includes four I-beams laid at the bottom, with a spacing of 850mm between the I-beams. A layer of horizontal timber is laid on top of the I-beams, with a spacing of 430mm between the horizontal timbers. A layer of vertical timber is laid on top of the horizontal timbers, with a spacing of 170mm between the vertical timbers. The horizontal and vertical timbers are tied together with thick iron wire and fixed with long nails. A 16mm thick bamboo plywood is laid on top of the vertical timbers and fixed to the vertical timbers with long nails.
4. The prefabrication device for slot-type crossbeams without demolding and roughening, as described in claim 1, is characterized in that... The height of the dovetail stop strip is 25mm.
5. The prefabrication device for slot-type crossbeams without demolding and roughening, as described in claim 1, is characterized in that... The cavity inner mold is provided in 6 parts, which are evenly distributed side by side on the bottom mold of the precast platform.
6. The prefabrication device for slot-type crossbeams without demolding and roughening as described in claim 1, characterized in that, The top of the dovetail grout stop ring is provided with a groove that mates with the corrugated steel pipe.