CN102418417B - Long-slab-span cast-in-situ beam ribbed floor early-dismantling template formwork system - Google Patents

Abstract

Large-span cast-in-place beam densely ribbed slab early demolition formwork support system, including beam formwork, densely ribbed slab formwork, trusses and brackets, and also includes adjustable pillars under the beams, which are later than brackets, trusses, and beams The formwork and ribbed slab formwork are removed, the support includes formwork brackets under the beam, shelving rods and pole pillars, the densely ribbed slab formwork includes profiled steel formwork and grids, the densely ribbed slab formwork is laid on the truss, and the end of the profiled steel formwork is located on the beam On the top of the formwork, a plug is arranged between the end of the profiled steel formwork and the top of the beam formwork. The floor formwork of the present invention adopts profiled steel formwork, the profiled steel formwork is laid on the grid, and the grid is laid on the truss, the truss spans on the beam formwork, no supporting scaffolding is required at the bottom of the floor, and the self-weight of the upper floor will not be transmitted Therefore, the construction of the floor formwork is simple, and early demolition can be easily realized, while the profiled steel formwork has many turnover times and low cost.

Description

Formwork support system for early demolition formwork of large-span cast-in-place beams and dense ribbed slabs

technical field

The invention relates to a formwork support structure for building a building structure system, in particular to a formwork support system for early demolition formwork for large-span cast-in-place beams and densely ribbed floor slabs.

Background technique

Improving the use efficiency of formwork has always been the goal pursued by owners and construction units. At present, the early demolition system of formwork used in building construction is mainly composed of bowl-buckle scaffolding, early demolition column heads, adjusting bases, main and secondary beams and formwork. . Bowl buckle scaffolding includes various components such as vertical poles, horizontal poles, and oblique poles. The top of the vertical poles needs to be installed with early dismantling columns, and the bottom end needs to be equipped with adjustment bases. This kind of support system requires a lot of materials, the erection workload is large, and the support height adjustment is small, and after the support is erected, personnel cannot pass through it, and other construction operations cannot be performed. The early demolition system often uses wooden beams as the primary and secondary beams. The wood has the disadvantages of low strength, large volatility, and poor durability. In actual use, the material loss is large, the formwork is thick, and the construction operation is inconvenient and uneconomical. In order to solve the problem of early demolition, some solutions have appeared in the prior art. For example, the Chinese patent application number is CN200910104171.8, and the publication date is June 26, 2009. The early demolition formwork system of a structural building mainly includes a formwork, an early demolition support column, and a rectangular top plate is fixedly connected to the top of the early demolition support column, and at least one early demolition mechanism is set on the early demolition support column; There is at least one through hole through which the lower end of the early demolition support column is connected with the upper end of the outer tube in the unloading mechanism; the four corners of the template are connected with L-shaped corners. There are also auxiliary beams, secondary auxiliary beams and secondary auxiliary templates. Through the special design and comprehensive adjustment of the structure, the above-mentioned technical scheme solves the problem that the horizontal formwork of the complex structure of the house floor including beams, slabs and columns is difficult to use the early demolition system, or there is no obvious advantage even if the traditional early demolition system is used. Building blocks are used. The integrated system makes the whole system easy to operate, safe and reliable, efficient, time-saving and labor-saving, easy to learn and use, and easy to promote. However, this system is proposed based on the conventional overall cast-in-place structure system, which adopts a modular structure, divides the floor formwork into multiple units, and each unit adopts an independent support structure. The cost of this formwork is higher, and when it is used on a large scale, in order to increase the construction speed, the cost is greatly increased.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a formwork support system with a simple structure and early demolition of large-span cast-in-place beams with densely ribbed slabs.

According to the present invention, the large-span cast-in-place beam densely-ribbed floor formwork support system includes beam formwork, densely-ribbed floor formwork, trusses supporting the densely-ribbed floor formwork, and brackets supporting the beam formwork and trusses, It also includes adjustable pillars under the beam, and the adjustable pillars under the beam are removed later than the support, truss, beam formwork and ribbed floor formwork, and the support includes the formwork support under the beam supported at the bottom of the beam formwork, The rest rods supporting the truss and the rod pillars supporting the rest rods, the densely ribbed floor formwork includes a profiled steel formwork and a grid supporting the profiled steel formwork, and the densely ribbed floor formwork is laid on the truss , the end of the ribbed floor formwork is located at the top of the beam formwork, and a plug is provided between the end of the profiled steel formwork and the top of the beam formwork.

According to the present invention, the large-span cast-in-place beam and ribbed floor slab early demolition formwork support system also has the following subsidiary technical features:

The grid is laid on the truss, the densely ribbed floor formwork is spliced by multiple pieces of profiled steel formwork, and multiple pieces of the profiled steel formwork are overlapped and spliced and laid on the grid.

The grid is made of wooden shelves or rectangular steel pipes.

The adjustable pillar under the beam includes a support rod, an adjustment structure located on the top of the support rod and a supporting plate connected with the adjustment structure.

The formwork support under the beam includes a cross bar supporting the beam formwork, the cross bar is fixed on the pole pillars, and diagonal braces are arranged between the pole pillars.

The plug is a rubber plug, including a base part, a plugging part formed on the base part and matched with the profiled steel template, and the plugging part is a plurality of convex parts formed on the base part The base part is provided with reinforcing ribs along the radial direction of the rubber plug.

The plug is fixed together with the beam template, and the end of the profiled steel template rests on the plugging portion of the plug.

A height adjustment mechanism is provided on the rod pillar, the height adjustment mechanism includes an adjustment nut, an adjustable screw driven by the adjustment nut, and a support plate on the top of the adjustable screw, and the support plate has a groove structure , the resting rod snaps into the groove.

The truss is a telescopic composite truss, and its end has a pick, and the pick is clamped on the shelving rod.

Compared with the prior art, a large-span cast-in-place beam densely ribbed slab formwork supporting system provided by the present invention has the following advantages:

1. The floor formwork of the present invention adopts profiled steel formwork. The profiled steel formwork is laid on the grid, and the grid is laid on the truss. Therefore, the construction of the floor formwork is simple, and early demolition can be easily realized, while the profiled steel formwork has many turnover times and low cost. Wood is saved, thereby effectively protecting forest resources.

2. The present invention is provided with adjustable pillars under the beam, which can reduce the stress span of the beam after the beam formwork and pillars are removed, and can also bear the upper load when the strength of the concrete beam does not fully reach the design strength, so that the beam formwork and The support is removed before the adjustable pillar under the beam, so that the beam formwork and support can be used in the next construction process earlier.

3. Since the set plug can seal the gap between the profiled steel formwork and the beam formwork to prevent slurry leakage, it is easy to remove the overlapping joint between the profiled steel formwork and the beam formwork.

4. There is a height adjustment mechanism on the pole pillar, so that the elevation of the plate is accurate, the pressure bearing capacity of the center of the pillar is large, and the number of pillars can be reduced.

5. The profiled steel formwork of the present invention adopts multiple overlapping splicing, which can shorten the length of the profiled steel formwork, is light in weight, and is convenient for transportation and disassembly.

Description of drawings

Fig. 1 is a schematic front view of the present invention.

Fig. 2 is a perspective view of a partial structure of the present invention.

Fig. 3 is an enlarged view of A in Fig. 1 .

Fig. 4 is an enlarged view of B in Fig. 1 .

Fig. 5 is a perspective view of the plug in the present invention.

Fig. 6 is a perspective view of the ribbed floor formwork in the present invention.

Detailed ways

Referring to Fig. 1 and Fig. 2, the embodiment of the early demolition formwork support system of the large-span cast-in-place beam densely ribbed floor slab provided by the present invention includes a beam formwork 1, a densely ribbed floor formwork 2, and supports the densely ribbed floor formwork 2 The truss 7 and the bracket 3 supporting the beam template 1 and the truss 7 also include an adjustable pillar 4 under the beam, and the adjustable pillar 4 under the beam is later than the bracket 3, the truss 7, the beam template 1 and the dense The ribbed slab formwork 2 is removed, and the support 3 includes a beam formwork support 31 supported at the bottom of the beam formwork 1, a resting rod 32 supporting the truss 7 and a rod pillar 33 supporting the resting rod 32. The ribbed slab formwork 2 includes a corrugated profiled steel formwork 21 and a grid 22 supporting the profiled steel formwork 21, the densely ribbed slab formwork 2 is laid on the truss 7, and the end of the densely ribbed slab formwork 2 is located at the The top of the beam formwork 1, a plug 5 is arranged between the end of the profiled steel formwork 2 and the top of the beam formwork 1. The present invention adopts the combined structure of the truss 7 and the profiled steel formwork 2, which can save the traditional formwork support method of the wood formwork and save the amount of wood used. Moreover, the profiled steel formwork has high strength, can meet the requirements of floor slab construction, and has low cost. There is no need to set a ground support frame in the middle of the large-span slab, which improves the construction speed of the formwork system, and can also reduce the impact on the construction of other processes. Since the profiled steel formwork is used, there is a gap between the profiled steel formwork 2 and the beam formwork 1, which may easily cause concrete to flow out from the gap and affect the formation of the floor slab. In the present invention, a plug 4 is arranged between the profiled steel formwork 2 and the beam formwork 1, so as to seal the gap and prevent concrete from flowing out. The grid 22 in this embodiment is a wooden grid, which is formed by laying wooden shelves. The wooden grid is laid on the truss 7 .

Referring to Fig. 1 and Fig. 2, in the above-mentioned embodiment given by the present invention, the grid 22 is laid on the truss 7, and the ribbed floor formwork 2 is formed by overlapping and splicing a plurality of profiled steel formworks, many The profiled steel templates of the blocks are spliced and laid on the grid 22 . The present invention adopts the splicing structure of a plurality of profiled steel formworks, and the transportation, assembly and disassembly of the profiled steel formworks are more convenient.

Referring to Fig. 1, Fig. 2 and Fig. 3, in the above-mentioned embodiment given by the present invention, the adjustable pillar 4 under the beam includes a support rod 41, an adjustment structure 42 located at the top of the support rod 41 and an adjustment structure connected with the adjustment structure. 42 connected pallet 43. The supporting plate 43 is used to support the bottom of the beam body, and supports the beam body, so that after the beam body reaches a certain strength, other brackets and templates can be removed, and only the adjustable pillar 4 under the beam remains. The adjustment structure 42 is used for height adjustment, which is convenient for installation and disassembly.

Referring to Fig. 1 and Fig. 2, in the above-mentioned embodiment given by the present invention, the beam lower formwork support 31 includes a cross bar 311 supporting the beam formwork 1, and the cross bar 311 is fixed on the bar support 33 Above, diagonal struts 331 are arranged between the rod struts 33 . The support structure can stably support the beam formwork 1 and ensure the stability of the beam formwork.

Referring to Fig. 5, in the above-mentioned embodiment of the present invention, the plug 5 is a rubber plug, including a base part 51, a plugging part formed on the base part 51 and matched with the profiled steel template 52, the blocking portion 52 is a plurality of raised portions formed on the base portion, and the base portion 51 is provided with reinforcing ribs 54 along the radial direction of the rubber plug. The rubber plug has a certain degree of elasticity. When the ribbed floor formwork 2 is pressed on it, the two can be bonded more closely. The reinforcing rib 54 can improve the integrity of the plug 5 and can be used even if it breaks.

Referring to Fig. 1 and Fig. 4, in the above-mentioned embodiment given by the present invention, the plug 5 is fixed together with the beam formwork 1, and the end of the profiled steel formwork 2 rests on the end of the plug 5. On the blocking part 52 . In the present invention, the plug 5 is first fixed on the beam formwork 1, and then the profiled steel formwork 2 is laid on it. The plug 5 is made of rubber material. After the profiled steel formwork 2 is pressed on it, it can be slightly deformed. Better play a blocking role.

Referring to FIG. 2 and FIG. 4 , in the above-mentioned embodiments of the present invention, a height adjustment mechanism 6 is provided on the rod support 33 . The height adjustment mechanism 6 includes an adjustment nut 61, an adjustable screw rod 62 driven by the adjustment nut 61, and a support plate arranged on the top of the adjustable screw rod, the support plate has a groove structure, and the rest bar is clamped into the groove.

Referring to FIG. 1 and FIG. 2 , in the above-mentioned embodiment of the present invention, the bracket 3 also includes a cross bar 36 supporting the beam formwork 1 and a diagonal stay bar 37 connecting each pillar 36 .

Referring to FIG. 1 and FIG. 6 , in the above-mentioned embodiment of the present invention, the truss 7 is a telescopic composite truss with a pick 71 at its end, and the pick 71 is clamped on the resting rod 32 . The invention adopts a telescopic combined truss, which can conveniently adjust the span of the truss, and the truss has strong versatility.

Claims (9)

1. The early demolition formwork support system for large-span cast-in-place beam densely ribbed slabs, including beam formwork, densely ribbed slab formwork, trusses supporting the densely ribbed slab formwork and supports for supporting the beam formwork and trusses, characterized in that : It also includes adjustable pillars under the beam, and the adjustable pillars under the beam are removed later than the support, truss, beam formwork and ribbed floor formwork, and the support includes the formwork support under the beam supported at the bottom of the beam formwork , the resting rod supporting the truss and the rod pillar supporting the resting rod, the densely ribbed floor formwork includes a profiled steel formwork and a grid supporting the profiled steel formwork, and the densely ribbed floor formwork is laid on the truss Above, the end of the profiled steel formwork is located at the top of the beam formwork, and a plug is provided between the end of the profiled steel formwork and the top of the beam formwork. 2. The formwork support system for large-span cast-in-place beams with densely ribbed slabs as claimed in claim 1, characterized in that: the grid is laid on the truss, and the densely ribbed slab formwork is composed of a plurality of pressed The profiled steel formwork is spliced, and multiple pieces of the pressed profiled steel formwork are overlapped and spliced and laid on the grid. 3. The formwork support system for large-span cast-in-place beams with densely ribbed slabs as claimed in claim 2, characterized in that: the grid is made of wooden stalls or rectangular steel pipes. 4. The large-span cast-in-place beam densely ribbed early demolition formwork support system of claim 1 is characterized in that: the adjustable pillar under the beam includes a support rod, an adjustment structure positioned at the top of the support rod and A supporting plate connected with the adjustment structure. 5. The large-span cast-in-place beam densely ribbed slab formwork supporting system for early demolition as claimed in claim 1, characterized in that: the formwork support under the beam includes a cross bar supporting the beam formwork, and the cross bar It is fixed on the rod pillars, and diagonal bracing rods are arranged between the rod pillars. 6. The large-span cast-in-place beam densely ribbed slab early demolition formwork support system as claimed in claim 1, characterized in that: the plug is a rubber plug, including a base, formed on the base and The plugging portion matched with the profiled steel formwork, the blocking portion is a plurality of raised portions formed on the base portion, and reinforcing ribs are arranged in the base portion along the radial direction of the rubber plug. 7. The formwork support system for large-span cast-in-place beams with densely ribbed floors as claimed in claim 6, characterized in that: the plug is fixed with the beam formwork, and the end of the profiled steel formwork Rest on the plugging portion of the plug. 8. The formwork support system for large-span cast-in-place beams with densely ribbed slabs as claimed in claim 1, characterized in that: a height adjustment mechanism is arranged on the rod pillar, and the height adjustment mechanism includes an adjustment nut, a The adjustable screw rod driven by the adjusting nut and the support plate arranged on the top of the adjustable screw rod, the support plate has a groove structure, and the rest rod is snapped into the groove. 9. The large-span cast-in-place beam and densely ribbed slab formwork support system for early demolition as claimed in claim 1, characterized in that: the truss is a telescopic composite truss, and its end has a pick, and the pick is stuck in the The rest on the rod.