A method for constructing concrete of a tensioning tooth block of a bottom plate of a corrugated steel web precast beam

Abstract

A kind of wave-shaped steel web prefabricated beam bottom plate tensioning tooth block concrete construction method, including hollow formwork extending in length direction and bottom is open structure, hollow formwork includes formwork standard area and formwork tooth block area, hollow opening area is opened in formwork standard area middle, multiple concrete pouring vibrated mouth are spaced apart and set in formwork tooth block area along tooth block inclined surface, vibrated mouth cover plate is hinged at concrete pouring vibrated mouth, hollow formwork is formed by multiple formwork slab blocks sequentially assembled along length direction, two adjacent formwork slab blocks are provided with reinforcing rib along its cross-sectional direction, the both ends of reinforcing rib are connected with connecting plate, the top of a pair of connecting plate is open type, and the connecting plate of formwork slab block is connected by high-strength bolt fastening.This application is provided with multiple openings on hollow formwork, it is convenient for construction personnel to supplement and vibrate the concrete located at the bottom of wave-shaped steel web prefabricated beam formwork and tooth block part, and the pouring density and forming quality of concrete are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of precast beam formwork, in particular to a wave-shaped steel web precast beam bottom plate tensioning tooth block concrete construction method. BACKGROUND

[0002] At present, in the construction of wave-shaped steel web precast beam tooth blocks and bottom plates, in order to ensure that the geometric size, appearance quality and structural strength of the wave-shaped steel web precast beam tooth blocks and bottom plates meet the design and specification requirements, reliable formwork support forming devices need to be set up. In the construction of wave-shaped steel web precast beam tooth blocks and bottom plates, the bottom plate and tooth block reinforcement is first bound, and then the formwork of the wave-shaped steel web precast beam tooth blocks and bottom plates is supported. Since the wave-shaped steel web precast beam does not have a concrete web, i.e. the web formwork does not need to be supported, after the wave-shaped steel web is installed, the bottom plate tooth block formwork and the bottom plate formwork are supported. The conventional tooth block and bottom plate formwork is a closed box structure. During the concrete pouring process, the concrete is filled in the space between the bottom plate tooth block formwork and the pedestal steel plate. After solidification, the formwork is removed to form the precast wave-shaped steel web precast beam tooth block and bottom plate structure shape. However, due to the poor flowability of the concrete, the concrete is poured from both sides of the space opening. At the same time, due to the special location, the construction personnel cannot effectively vibrate the concrete, and local cavities and concrete pitted surfaces are easily formed in the space between the formwork bottom and the pedestal. SUMMARY

[0003] To solve the above problems, the present application provides a wave-shaped steel web precast beam tooth block and bottom plate hollow formwork which facilitates the vibration of the concrete at the bottom of the wave-shaped steel web precast beam tooth block and bottom plate by the construction personnel, thereby improving the concrete pouring and forming quality.

[0004] The technical scheme adopted by the present application is as follows:

[0005] A wave-shaped steel web precast beam bottom plate tensioning tooth block hollow formwork, comprising a hollow formwork extending in the length direction and having an open structure at the bottom. The hollow formwork comprises a formwork standard area and a formwork tooth block area. A hollow opening area is formed in the middle of the formwork standard area. A plurality of concrete pouring and vibrating openings are formed in the formwork tooth block area along the tooth block inclined surface. A vibrating opening cover plate is hinged at the concrete pouring and vibrating opening. The hollow formwork is composed of a plurality of formwork plate blocks which are sequentially assembled at the ends in the length direction. The formwork plate blocks are arranged in the cross-sectional direction. Two adjacent formwork plate blocks are provided with a reinforcing rib in the cross-sectional direction. The two ends of the reinforcing rib are connected with a connecting plate. The top of the connecting plate of a pair of connecting plates is in an open type. The connecting plates of two adjacent formwork plate blocks are tightly connected by high-strength bolts.

[0006] The hollow opening area serves as the inlet for pouring the bottom plate and tooth block concrete, or as the insertion window for the concrete pouring and vibrating rod.

[0007] The template tooth block region is connected with a door latch ring on both sides of the opening end of the vibrating hole cover plate, and the door latch is threaded through the door latch ring on the upper and both sides of the vibrating hole cover plate when the vibrating hole cover plate is closed.

[0008] The vibrating hole cover plate is connected to the hollow formwork through a hinge.

[0009] The concrete pouring vibrating hole is an opening with a size of 30cm*30cm.

[0010] The size of the template plate in the template standard region is larger than that of the template plate in the template tooth block region.

[0011] A tensioning tooth block concrete construction method, which comprises the following steps:

[0012] S1. The hollow formwork of the precast beam bottom plate tooth block is assembled on the ground by template plates, and the assembled hollow formwork is divided into a template standard region in a horizontal part and a plurality of template tooth block regions. The template standard region is cut into a hollow opening area according to the size of the tooth block and needs to be cut into a rectangular opening in the middle part along the length direction. The slope part of the template tooth block region is provided with a concrete pouring vibrating hole.

[0013] S2. The iron block cut off from the template tooth block region is made into a movable vibrating hole cover plate. The vibrating hole cover plate is connected to the hollow formwork through a hinge by welding. The door latch ring is connected to the template tooth block region on both sides of the opening end of the vibrating hole cover plate, and a free door latch is arranged.

[0014] S3. The template tooth block region is assembled by template plates. High-strength bolts are used to connect the template plates to improve the integrity between the template plates.

[0015] S4. The installation of the precast beam bottom plate tooth block hollow formwork is completed in two steps. First, the side formwork is installed, and the bottom plate and the bottom part of the tooth block are poured with concrete. The concrete at this position is convenient and fast. When the pouring height reaches the slope starting point of the tooth block, the pouring is paused. The top plate formwork of the template tooth block region is installed, and the vibrating hole cover plate is opened by tightening and fixing with high-strength bolts.

[0016] S5. The concrete in the tooth block is poured through the pump pipe passing through the top plate of the precast beam. The concrete is poured and vibrated from the concrete pouring vibrating hole of the template tooth block region, and the vibrating hole cover plate is opened during pouring. After the pouring and vibrating are completed, the door latch is inserted.

[0017] In the S4 step, the hollow opening area cut in the center of the top plate of the precast beam bottom plate tooth block hollow formwork is threaded through the pump pipe, and the concrete is directly poured by pumping and fully vibrated by layering.

[0018] The pouring sequence of the concrete in the S5 step of pouring the inside of the tooth block is from low to high in slope, and the pouring and vibration compaction are carried out in sequence, the vibration opening cover plate is closed immediately after the pouring and vibration compaction, and the pouring and vibration are sequentially continued to the place with larger slope, until the pouring is completed.

[0019] The pouring and vibration method has the advantages that the pouring and vibration method is simple, the hollow formwork is provided with a plurality of openings, the concrete at the bottom of the corrugated steel web prefabricated beam formwork and the tooth block part can be conveniently poured, supplemented and vibrated in multiple layers, and thus the pouring compactness and forming quality of the concrete are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 4 is a schematic view of the closed state of the vibration opening cover plate in the application.

[0021] Figure 2 Fig. 5 is a schematic view of the opened state of the vibration opening cover plate in the application.

[0022] Figure 3 Fig. 6 is a schematic view of the cross section along the length direction of the application.

[0023] Figure 4 Fig. 7 is a schematic view of the elevation of the tooth block area in the application.

[0024] Figure 5 Fig. 8 is a schematic view of the splicing structure of the adjacent formwork plates in the application.

[0025] Wherein: 1-hollow formwork; 2-latch ring; 3-latch; 4-hinge; 5-high-strength bolt; 6-vibration opening cover plate; 7-connection plate; 8-hollow opening area; 9-formwork plate; 10-tooth block prestressed tensioning anchor; 11-formwork standard area; 12-formwork tooth block area; 13-concrete pouring and vibration opening; 14-stiffening rib. DETAILED DESCRIPTION

[0026] A corrugated steel web prefabricated beam tooth block and bottom hollow formwork, comprising a hollow formwork 1 extending along the length direction and having an open structure at the bottom, the hollow formwork 1 comprising a formwork standard area 11 and a formwork tooth block area 12, a hollow opening area 8 being provided in the middle of the formwork standard area 11, and a plurality of concrete pouring and vibrating openings 13 being provided in the formwork tooth block area 12 at intervals along the tooth block inclined surface, the concrete pouring and vibrating openings 13 serving as the inlet for pouring and vibrating concrete for the bottom plate and the tooth block, and also serving as the insertion window for the concrete pouring and vibrating rod, thereby improving the compactness of the concrete, and the vibrating opening cover plate 6 being hinged at the concrete pouring and vibrating opening 13, the hollow formwork 1 being composed of a plurality of formwork plate blocks 9 which are sequentially assembled end to end along the length direction, and extending in the cross-sectional direction, the adjacent two formwork plate blocks 9 being provided with a reinforcing rib 14 extending in the cross-sectional direction, and the two ends of the reinforcing rib 14 being connected with a connecting plate 7, the top of the pair of connecting plates 7 being in an open type, and the connecting plates 7 of the adjacent two formwork plate blocks 9 being fastened and connected through high-strength bolts 5, thereby improving the integrity between the formwork plate blocks 9.

[0027] The hollow opening area 8 serves as the inlet for pouring and vibrating concrete for the bottom plate and the tooth block, or as the insertion window for the concrete pouring and vibrating rod, thereby improving the compactness of the concrete.

[0028] The door latch ring 2 is connected on both sides of the opening end of the vibrating opening cover plate 6 on the formwork tooth block area 12, the door latch 3 is threaded on the door latch ring 2 above and on both sides of the vibrating opening cover plate 6 when the vibrating opening cover plate 6 is closed, when the hollow formwork 1 is installed stably, the construction personnel can enter into the box type formwork while pouring concrete, and use the concrete pouring and vibrating opening 13 of the formwork tooth block area 12 and the hollow opening area 8 of the formwork standard area 11 to vibrate the concrete in the bottom space, when pouring the formwork tooth block area 12, the vibrating opening cover plate 6 is gradually closed along with the rising of the poured concrete, and the vibrating opening cover plate 6 is locked by the door latch 3, thereby preventing the concrete from flowing out of the pouring and vibrating opening 13.

[0029] The vibrating opening cover plate 6 is connected to the hollow formwork 1 through the hinge 4, and the vibrating opening cover plate 6 is convenient to open and close, thereby facilitating the construction.

[0030] The concrete pouring and vibrating opening 13 is an opening of 30cm*30cm.

[0031] The size of the formwork plate block 9 of the formwork standard area 11 is greater than that of the formwork plate block 9 of the formwork tooth block area 12, the poured concrete of the formwork standard area 11 is relatively flat, and the area is relatively large, and the formwork plate block 9 with a larger size is used for splicing, and the formwork plate block 9 with a smaller size is used for splicing in the formwork tooth block area 12 for improving the quality of the poured concrete on the slope surface.

[0032] A tension tooth block concrete construction method using the corrugated steel web prefabricated beam bottom plate tension tooth block hollow formwork, and the construction steps are as follows:

[0033] S1. The prefabricated beam bottom plate tooth hollow formwork 1 is assembled on the ground by formwork blocks 9, and the assembled hollow formwork 1 is divided into horizontal formwork standard areas 11 and a plurality of formwork tooth block areas 12. The formwork standard area 11 is cut into a hollow opening area 8 according to the size of the tooth block at the central intermediate part along the length direction. The formwork tooth block area 12 is provided with a concrete pouring and vibrating opening 13 on the slope surface. The opening serves as an inlet for pouring the bottom plate and tooth block concrete, or as a concrete pouring and vibrating rod insertion window to improve the compactness of the concrete.

[0034] S2. The opening iron block cut from the formwork tooth block area 12 is made into a movable vibrating opening cover plate 6. The vibrating opening cover plate 6 is connected to the hollow formwork 1 by a hinge 4. The formwork tooth block area 12 is connected with a door latch ring 2 on both sides of the opening end of the vibrating opening cover plate 6, and a free door latch 3 is arranged.

[0035] S3. The formwork tooth block area 12 is assembled by formwork blocks 9. High-strength bolts 5 are used to connect the assembled formwork blocks 9 to improve the integrity between the formwork blocks 9.

[0036] S4. The installation of the prefabricated beam bottom plate tooth hollow formwork 1 is completed in two steps. First, the side form is installed, and the bottom plate and tooth block bottom concrete are poured. The concrete at this position is convenient and fast. When pouring the bottom plate and tooth block bottom concrete, the hollow opening area 8 cut in the center of the top plate of the prefabricated beam bottom plate tooth hollow formwork 1 is passed through the pump pipe, and the concrete is directly poured by pumping. The concrete is fully vibrated and compacted layer by layer. When the pouring height reaches the tooth block slope starting point, the pouring is stopped. The top plate formwork of the formwork tooth block area 12 is installed, and the high-strength bolts 5 are tightened and fixed. The vibrating opening cover plate 6 is opened.

[0037] S5. The concrete inside the tooth block is poured through the pump pipe passing through the top plate of the prefabricated beam. The pouring sequence is from low to high according to the slope. The concrete is poured and vibrated from the concrete pouring and vibrating opening 13 of the formwork tooth block area 12, and is vibrated and compacted. After the pouring and vibration are completed, the vibrating opening cover plate 6 is closed. The vibrating opening cover plate 6 is opened during pouring. After the pouring and vibration are completed, the door latch 3 is inserted. The pouring and vibration continue in sequence to the larger slope. Until the pouring is completed, the concrete is vibrated and compacted.

[0038] When the pouring application, the template tooth block area 12 is provided with the tooth block prestressed tension anchor 10 parallel to the bottom surface, after the concrete is poured into the space between the formwork and the bottom formwork, a small amount of slurry will seep out from the gap of the formwork plate 9 and flow to the two connecting plates 7 fixed together, and will solidify in them after a long time, because the connecting plates 7 fixedly connected on the adjacent formwork plate 9 are arranged in an open type, when the formwork plate 9 is removed, the force is applied to the opening of the formwork plate 9, and the two connecting plates 7 are pulled outward by a distance, then the gap between the two connecting plates 7 on the formwork plate 9 and the connecting plates 7 corresponding to the adjacent formwork plate 9 is increased, thereby reducing the difficulty of formwork disassembly and better pulling out the formwork outward.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 present application.

[0040] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0041] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The embodiments of the present application have been described in detail above, but the content described is only the preferred embodiments of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application shall still belong to the patent scope of the present application.

Claims

1. A hollow template for tensioning toothed blocks in the bottom slab of a precast corrugated steel web beam, characterized in that, The hollow template (1) extends along the length direction and has an open bottom structure. The hollow template (1) includes a standard template area (11) and a template toothed block area (12). The standard template area (11) has a hollow open area (8) in the middle. The template toothed block area (12) has multiple concrete pouring and vibration ports (13) spaced apart along the inclined surface of the toothed block. A vibration port cover plate (6) is hinged at the concrete pouring and vibration port (13). The hollow template (1) is composed of multiple template panels (9) assembled end to end along the length direction. The cross-sectional direction of the panels extends. Reinforcing ribs (14) extend along the cross-sectional direction of two adjacent template panels (9). Connecting plates (7) are connected at both ends of the reinforcing ribs (14). The top of a pair of connecting plates (7) is open. The connecting plates (7) of two adjacent template panels (9) are fastened together by high-strength bolts (5).

2. The hollow formwork for tensioning toothed blocks of the bottom slab of the precast corrugated steel web beam according to claim 1, characterized in that, The hollow opening area (8) serves as the inlet for pouring concrete for the base plate and toothed blocks, or as the insertion window for the concrete pouring vibrator.

3. The hollow formwork for tensioning toothed blocks of the bottom slab of the precast corrugated steel web beam according to claim 2, characterized in that, On the template tooth block area (12), there are latch rings (2) on both sides of the opening end of the vibratory port cover plate (6). When the vibratory port cover plate (6) is closed, latches (3) are passed through the latch rings (2) above and on both sides of the vibratory port cover plate (6).

4. The hollow formwork for tensioning toothed blocks of the bottom slab of the precast corrugated steel web beam according to claim 3, characterized in that, The vibratory tamping port cover (6) is connected to the hollow template (1) by a hinge (4).

5. The hollow formwork for tensioning toothed blocks of the bottom slab of the precast corrugated steel web beam according to claim 4, characterized in that, The concrete pouring and vibration port (13) is a 30cm*30cm opening.

6. The hollow formwork for tensioning toothed blocks of the bottom slab of the precast corrugated steel web beam according to claim 5, characterized in that, The size of the template plate (9) in the template standard area (11) is larger than the size of the template plate (9) in the template toothed area (12).

7. A method for constructing a precast corrugated steel web beam bottom slab with tensioned toothed concrete, characterized in that, The construction steps using the hollow formwork for tensioning toothed blocks in the bottom slab of the precast corrugated steel web beam as described in claim 6 are as follows: S1. The hollow template (1) of the precast beam bottom plate toothed block is assembled on the ground by template plates (9). The assembled hollow template (1) is divided into a horizontal template standard area (11) and multiple template toothed block areas (12). The template standard area (11) has a rectangular opening cut in the middle part along the length direction according to the size of the toothed block as a hollow opening area (8). The template toothed block area (12) has concrete pouring and vibration ports (13) on the slope surface. S2. The iron block cut from the template tooth block area (12) is made into a movable vibratory tamping port cover (6). The vibratory tamping port cover (6) is connected to the hollow template (1) by welding hinges (4). Door bolt rings (2) are connected to both sides of the opening end of the vibratory tamping port cover (6) on the template tooth block area (12), and a free door bolt (3) is set at the same time. S3. The template toothed block area (12) is assembled from template plates (9). The assembled template plates (9) are connected by high-strength bolts (5) to improve the integrity between template plates (9). S4. The installation of the hollow template (1) for the toothed block of the precast beam bottom plate is completed in two steps. First, the side template is installed, and the bottom plate and the bottom of the toothed block concrete are poured. When the pouring height reaches the toothed block slope point, the pouring is stopped. The top plate template of the toothed block area (12) is installed and tightened with high-strength bolts (5). The vibratory tamping port cover plate (6) is opened. S5. The concrete inside the toothed block is poured through the pump pipe that passes through the top plate of the precast beam. The concrete is poured and vibrated from the concrete pouring and vibration port (13) in the toothed block area of ​​the template (12) and compacted. The cover plate (6) of the vibration port is opened during pouring and the latch (3) is inserted after the pouring and vibration are completed.

8. The method for constructing the bottom slab of a precast corrugated steel web beam with tensioned toothed concrete according to claim 7, characterized in that, In step S4, when pouring concrete for the bottom plate and the bottom of the toothed block, the concrete is poured through the hollow opening area (8) cut at the center of the top plate of the hollow template (1) of the precast beam bottom plate toothed block through the pump pipe and pumped directly, and then fully vibrated and compacted in layers.

9. The method for constructing the bottom slab of a precast corrugated steel web beam with tensioned toothed concrete according to claim 8, characterized in that, In step S5, when pouring concrete inside the toothed block, the pouring sequence is to pour and vibrate it in order from low to high slope. After pouring and vibrating, the vibrating port cover plate (6) is closed immediately, and the pouring and vibrating continues in order to the slope with a larger slope until all pouring is completed and vibrated to a denser state.

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