Supporting jacking for early disassembly of dense rib floor system mold box

Abstract

The utility model relates to a supporting jack for early dismantling of a dense rib floor system mould box, which comprises a vertical supporting rod and further comprises a mould box supporting piece, a mounting hole is vertically formed in the mould box supporting piece in a penetrating manner, the mould box supporting piece is vertically sleeved on the vertical supporting rod in a sliding manner through the mounting hole, a horizontal mould box supporting surface is formed on the upper surface of the mould box supporting piece, and the mould box supporting surface is arranged on the lower surface of the mould box supporting piece. The upper end face of the vertical supporting rod forms a horizontal center supporting face, the vertical supporting rod is connected with a lifting positioning piece used for sliding limiting of the mold box supporting piece on the vertical supporting rod, and the lifting positioning piece is located below the mold box supporting piece. The mold box supporting piece is constructed to be capable of being rapidly separated from the vertical supporting rod in the radial direction of the vertical supporting rod. According to the utility model, the supporting jack is combined with the improvement of the mould box and the supporting mode, the limitation of the mould box supporting piece on the mould box is relieved after the concrete slurry is finally set for 4-7 days and the foundation strength is achieved, the mould box can be dismounted in advance and recycled, the whole dismounting is not needed after the curing period for about 30 days is completely finished, the efficiency can be improved, and the cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pillars and supports in fixed buildings, and in particular relates to a supporting jacking bracket used for early dismantling of a dense-ribbed floor formwork box. Background Art

[0002] By constructing and laying the building formwork (also called formwork shell) according to the design, the lower surface of the formwork box has a concave cavity, which can facilitate the casting of the dense rib floor. The traditional way of laying the building formwork box is to support the floor formwork through the brackets set up all over the floor, and further place and support the formwork box through the floor formwork. The support process and subsequent removal efficiency of this support method are very low, and the connection and positioning effect between the formwork boxes is also relatively poor.

[0003] In view of the above situation, the applicant designed and used a support top bracket and mold box support structure as disclosed in Chinese patent CN221095823U. The support top bracket has a top plate with adjustable height. Four vertical through holes arranged in a rectangular shape are opened on the top plate, and the mold box is directly supported and connected through the top plate. When in use, the four mold boxes supported above are arranged in a matrix and pressed against each other. The corner positions in the middle of the four mold boxes are supported on the top plate of the support top bracket; vertical connection holes are opened one-to-one on the flanges at the corner positions in the middle of the four mold boxes corresponding to the four vertical through holes on the top plate, and the connection can be implemented by fasteners. Choosing this support method has high loading and unloading construction efficiency, and the stability and installation accuracy of the mold box can also be effectively guaranteed.

[0004] However, with the existing (including the aforementioned two) formwork support methods, after pouring concrete slurry on the constructed formwork, it takes about 4-7 days for the concrete slurry to undergo initial and final setting to reach about 50%-70% of the design strength, and further maintenance is required; it takes a total of about 30 days for the reinforced concrete floor to reach the design strength before the supporting structure can be dismantled as a whole. The turnover efficiency of components in the entire supporting structure is too low, resulting in high construction costs and long cycles.

[0005] The applicant considered designing a support top bracket that can realize early removal of the mold box. According to the requirements of construction standards, under the premise of maintaining point support with unit density throughout the entire curing period, after the concrete slurry has finally set for about 4-7 days and reaches the foundation strength, the mold box can be removed and recycled in advance, and the support rods of the support top bracket can always maintain support until the curing is completed according to the requirements of construction standards. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a supporting top bracket for early dismantling of the dense-rib floor formwork box, thereby avoiding the problem of low turnover efficiency of parts in the current entire formwork box support structure, and achieving the effect that the formwork box can be dismantled first and then recycled.

[0007] To solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A support jack for early removal of formwork boxes in a ribbed floor slab, including a vertical support rod; further including a formwork box support member, a mounting hole is vertically penetrated through the formwork box support member, and the formwork box support member is vertically slidably sleeved on the vertical support rod through the mounting hole. The upper surface of the formwork box support member forms a horizontal formwork box support surface, and the upper end surface of the vertical support rod forms a horizontal central support surface. An elevating positioning member for limiting the sliding of the formwork box support member on the vertical support rod is connected to the vertical support rod, and the elevating positioning member is located below the formwork box support member.

[0009] The formwork box support member is configured to be separable from the vertical support rod along the radial direction of the vertical support rod.

[0010] Optionally, the formwork box support member and the mounting hole are detachably connected by at least two split structures axially split along the vertical support rod.

[0011] Further, a horizontal top plate is fixedly connected to the upper end of the vertical support rod, and the area of the upper surface of the top plate is larger than the area of the upper end surface of the vertical support rod. The upper surface of the top plate forms the central support surface;

[0012] The inner diameter of the mounting hole corresponds to the outer diameter of the vertical support rod. A sunk platform is recessed on the upper surface of the formwork box support member, and the circumferential contour and depth of the sunk platform correspond to the outer contour and thickness of the top plate.

[0013] Further, the top plate is circular and coaxial with the vertical support rod. Correspondingly, the sunk platform is also circular and coaxial with the mounting hole.

[0014] Further, the formwork box support member includes a vertical sleeve, the top end of the sleeve is fixedly connected with a horizontal formwork box support plate, the inner hole of the sleeve vertically penetrates through the formwork box support plate and forms the mounting hole, and the upper surface of the formwork box support plate forms the formwork box support surface. The sunk platform is recessed on the upper surface of the formwork box support plate.

[0015] Further, a plurality of circumferentially spaced support reinforcing rib plates are connected between the outer circumferential surface of the sleeve and the lower surface of the formwork box support plate.

[0016] Further, the formwork box support member is a two-split structure axially split along the vertical support rod;

[0017] The sleeve has two symmetrical support reinforcing rib plates on the left and right parallel to the buckling surfaces of the two-split structure, and also has a support reinforcing rib plate perpendicular to the buckling surfaces;

[0018] On the two-piece structure, the support and reinforcement rib plates parallel to the fastening surface are pairwise parallel and facing each other, and connection holes for passing fasteners are formed through the two support and reinforcement rib plates facing each other in parallel.

[0019] Further, the fastener is in the form of bolt connection or pin and shim connection.

[0020] Further, the vertical strut is a screw rod with an external thread, and the lifting and positioning member is a support lifting nut connected in cooperation with the screw rod.

[0021] Optionally, a horizontal circular top plate is coaxially fixed to the upper end of the vertical strut, and the area of the upper surface of the top plate is larger than the area of the upper end surface of the vertical strut. The upper surface of the top plate forms the central support surface;

[0022] A counterbore coaxial with the mounting hole is recessed on the upper surface of the formwork support member, and the inner diameter and depth of the counterbore correspond to the outer diameter and thickness of the top plate;

[0023] The mounting hole and the counterbore radially penetrate through to the side surface of the formwork support member through a groove with the same width as their diameters.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] 1. The support jack for early removal of the formwork of the ribbed floor slab of the utility model, combined with the improvement of the formwork and the support method, when concrete slurry is poured on the floor slab mold, after the final setting of the concrete slurry for 4 - 7 days and reaching the basic strength, the restriction of the formwork support member on the formwork is released, and the formwork can be removed in advance without waiting until the entire curing period of about 30 days is over and then removed as a whole. The formwork is removed first and recycled, which can improve the recycling efficiency and reduce the construction cost. And the vertical strut still maintains the support for the floor slab, and during the entire curing period, it also meets the support effect required by the building construction standard.

[0026] 2. The support jack for early removal of the formwork of the ribbed floor slab of the utility model, the formwork support member can be disengaged from the vertical strut radially (quickly), which further facilitates the removal of the formwork and improves the construction efficiency. Description of the Drawings

[0027] Figure 1 It is the front view of a support jack for early removal of the formwork of the ribbed floor slab in the first embodiment;

[0028] Figure 2 It is the three-dimensional view of a support jack for early removal of the formwork of the ribbed floor slab in the first embodiment;

[0029] Figure 3 It is the exploded view of a support jack for early removal of the formwork of the ribbed floor slab in the first embodiment;

[0030] Figure 4 is Figure 2 the top view;

[0031] Figure 5 is the top view of the formwork support member in the support and jack for the second embodiment;

[0032] Figure 6 is the schematic diagram of the support and use of the support and jack for the first embodiment;

[0033] Figure 7 is the schematic diagram of the early removal effect of the formwork when the support and jack for the first embodiment are in use;

[0034] Among them, the vertical strut 1, the top plate 11, the central support surface 12, the formwork support member 2, the two-piece structure 21, the formwork support surface 22, the installation hole 23, the sunk platform 24, the sleeve 25, the formwork support plate 26, the support reinforcing rib plate 27, the connection hole 28, the groove 29, the lifting positioning member 3, the screw lifting nut 4,

[0035] the formwork 5, the early removal notch 51, the support block 6. Specific embodiments

[0036] The following further elaborates on the specific embodiments of the present invention with reference to the accompanying drawings.

[0037] Embodiment 1

[0038] Please refer to Figures 1-3 , a support and jack for early removal of formwork for a ribbed floor slab in a specific embodiment, including a vertical strut 1 for liftable connection to a steel pipe scaffold; further including a formwork support member 2, the formwork support member 2 is vertically penetrated with an installation hole 23, and the formwork support member 2 is vertically slidably sleeved on the vertical strut 1 through the installation hole 23, the upper surface of the formwork support member 2 forms a horizontal formwork support surface 22, the upper end surface of the vertical strut 1 forms a horizontal central support surface 12, and a lifting positioning member 3 for sliding limit of the formwork support member 2 on the vertical strut 1 is connected to the vertical strut 1, and the lifting positioning member 3 is located below the formwork support member 2. Axially, the length of the vertical strut 1 is greater than that of the formwork support member 2; the formwork support member 2 can slide to make the formwork support surface 22 flush with the central support surface 12.

[0039] Regarding the early removal principle of the formwork, it is necessary to introduce the formwork and related support methods using this support and jack here. Please refer to Figure 6 and Figure 7, the formwork box 5 includes a horizontal top surface of the formwork box. A peripheral side surface extending downward is connected to the periphery of the top surface of the formwork box. The lower edge of the peripheral side surface continues to extend horizontally outward to form a flange, and the outer contour of the flange is square; the free end surface of the outer edge of the flange forms a working connection surface for the formwork boxes 5 to abut against each other. There is a notch design at the four corners of the flange, and an early removal notch 51 is formed at the four corner positions.

[0040] When building the support, multiple formwork boxes 5 are arranged vertically and horizontally and abut against each other to form a bottom formwork of the floor slab to be cast in place. Taking four formwork boxes 5 as an example (one formwork box 5 is shown in the figure), the lower surfaces of the four formwork boxes 5 are coplanar and arranged in a matrix. The formwork boxes 5 abut against each other through the working connection surface. A support jack of the present invention is commonly supported below the corner position in the middle of the four formwork boxes 5. The lower end of the vertical strut 1 is connected in a lifting manner to the support vertical rod of the steel pipe scaffold (not shown in the figure). The formwork support member 2 slides upward until the formwork support surface 22 is flush with the central support surface 12. The lifting positioning member 3 is restricted at the bottom of the formwork support member 2 to form a support to prevent the formwork support member 2 from descending. Through the early removal notch 51, the four formwork boxes 5 form a regular combined notch at the corner position in the middle. A support block 6 with a corresponding shape is movably placed in the combined notch (the support block 6 can play a role in sealing the concrete slurry during the process of pouring the concrete slurry and is used to independently support the floor slab to be cured after the concrete slurry has finally set and the formwork has been removed early). The upper end surface of the vertical strut 1 (i.e., the central support surface 12) abuts against the lower surface of the support block 6, and the upper surface of the formwork support member 2 (i.e., the formwork support surface 22) abuts against the lower surface of the flange of each formwork box 5. Here, from the perspective of process dimension assignment, it can be understood that the area of the lower surface of the support block 6 is not less than the area of the central support surface 12, and the central support surface 12 is located within the outer contour of the lower surface of the support block 6, while the lower surface of the support block 6 is located within the outer contour of the formwork support surface 22. The outer edge of the formwork support surface 22 abuts against the lower surface of the flange of each formwork box 5, and its inner edge can also abut against the lower surface of the support block 6 outside the abutting position with the central support surface 12.

[0041] After the mold is built, concrete slurry is poured on the floor mold. After 4-7 days of initial and final setting, the concrete slurry reaches about 50%-70% of the design strength, and the mold box 5 can be removed in advance. The specific method is: move the lifting and positioning member 3 of the supporting top support downward to release the restriction on the mold box support member 2. The mold box support member 2 also slides to the designed height with the corresponding downward movement of the lifting and positioning member 3. The central support surface 12 still maintains support for the cast floor through the support block 6. Since the central support surface 12 is located within the lower surface of the support block 6, it does not support the mold box 5, and the mold box support member 2 supporting the mold box 5 has been lowered to release the support for the mold box 5. , remove the connection between the mold boxes 5, knock and loosen the mold box 5, and the mold box 5 can also be lowered and separated from the floor, but because there are mold box support members 2 and vertical struts 1 at the four corners, the horizontal mold box 5 is still not easy to take out. Any flange of the mold box 5 can be tilted horizontally to make the mold box 5 rotate and tilt. After tilting to a certain degree, the mold box support members 2 and vertical struts 1 at the four corners can be moved away, and the mold box 5 can continue to be lowered and finally taken out, so that the mold box 5 can be removed early. There is no need to wait until the maintenance period of about 30 days is over before dismantling the whole. The mold box 5 is dismantled first and recycled, which improves the efficiency of turnover and reduces the cost of construction. The vertical struts 1 still maintain support for the floor through the support blocks 6, which also meets the construction standard requirement that the floor still maintains point support of unit density during the entire maintenance period.

[0042] Of course, in actual construction and relevant standard requirements, the length of the vertical support rod 1 that can be lifted and lowered and extends out of the support rod cannot exceed 500 mm. The mold box support 2 and the lifting and positioning member 3 (especially the mold box support 2) also have a certain thickness to ensure the strength of the structure. The actual stroke size for the mold box support 2 to slide down is not large; in addition, the mold box 5 needs to be lowered to its upper surface below the bottom surface of the floor slab. At least the stroke size of the full thickness of the mold box 5 is required. Therefore, there is not enough space for the mold box 5 to be lowered and rotated and tilted to be removed, resulting in difficulty in removing it after early removal! In order to avoid interference in removal, the mold box support 2 should be further constructed into a structural form that can be (quickly) separated from the vertical support rod 1 along the radial direction of the vertical support rod 1. In this way, the mold box support 2 that causes the main interference in the removal of the mold box 5 is lowered and removed in advance, and the early removal of the mold box 5 can be more convenient, avoiding bumps, and is more efficient and more practical.

[0043] There is no limit to the structural form of the mold box support 2 that can (quickly) detach from the vertical support rod 1 in the radial direction of the vertical support rod 1. In this embodiment, the mold box support 2 and the mounting hole 23 are detachably connected by at least two petal structures divided along the axial direction of the vertical support rod 1. The multi-petal structure is enclosed to form the mold box support 2, and the enclosed state can be maintained by using an external hoop ring or a clamp (not shown in the figure). When the clamp is released, the multi-petal structure is dispersed to achieve disassembly, and can be (quickly) detached from the vertical support rod 1 in the radial direction.

[0044] Please continue to seeFigure 3 Among them, the upper end of the vertical strut 1 is fixedly connected with a horizontal top plate 11, and the area of the upper surface of the top plate 11 is larger than the area of the upper end surface of the vertical strut 1. The upper surface of the top plate 11 forms the central support surface 12;

[0045] The inner diameter of the mounting hole 23 corresponds to the outer diameter of the vertical strut 1. The upper surface of the mold box support member 2 is recessed with a sunk platform 24. The circumferential contour and depth of the sunk platform 24 correspond to the outer contour and thickness of the top plate 11. In the case of a multi-lobe structure, the sunk platforms 24 are also respectively arranged on the multi-lobe structures that make up the mold box support member 2; during support use, the mold box support member 2 slides upward, the top plate 11 falls into the sunk platform 24, and the bottom wall of the sunk platform 24 abuts against the lower surface of the top plate 11. At the same time, the upper surface of the mold box support member 2 is flush with the upper surface of the top plate 11, that is, the mold box support surface 22 is flush with the central support surface 12. The lifting positioning member 3 is restricted at the bottom of the mold box support member 2, so that the mold box support member 2 is restricted between the top plate 11 and the lifting positioning member 3, fixing the mold box support member 2, which is convenient for implementing support.

[0046] In terms of specific dimensions, the top plate 11 is circular and coaxial with the vertical strut 1. Correspondingly, the sunk platform 24 is also circular and coaxial with the mounting hole 23. In this way, it is convenient for processing and manufacturing, and the support force application point is located at the central position, which is also more balanced and stable.

[0047] Please refer to Figure 2 In this embodiment, the mold box support member 2 includes a vertical sleeve 25. The top end of the sleeve 25 is fixedly connected with a horizontal mold box support plate 26. The inner hole of the sleeve 25 vertically penetrates the mold box support plate 26 and forms the mounting hole 23. The upper surface of the mold box support plate 26 forms the mold box support surface 22, and the sunk platform 24 is recessed and arranged on the upper surface of the mold box support plate 26. In this way, the outer shape of the sleeve 25 is circular, and the outside of the sleeve 25 can be conveniently connected by a clamp, and a detachable connection can be conveniently realized in the form of two-lobe, three-lobe or four-lobe.

[0048] A plurality of circumferentially spaced support reinforcing rib plates 27 are connected between the outer circumferential surface of the sleeve 25 and the lower surface of the mold box support plate 26. The support reinforcing rib plates 27 are triangular, and the two right-angled sides are respectively welded and fixedly connected to the outer circumferential surface of the sleeve 25 and the lower surface of the mold box support plate 26. When the thickness of the mold box support plate 26 is the same as the thickness of the top plate 11, the sunk platform 24 penetrates through the mold box support plate 26, and the upper end surface of the sleeve 25 and the upper end surface of the support reinforcing rib plates 27 form the bottom wall of the sunk platform 24.

[0049] Please refer to Figure 3, in this embodiment, the mold box support member 2 is a two-piece structure 21 obtained by axially dividing the vertical support rod 1, which is simpler to process and use while ensuring the detachable function; the two-piece structure 21 is symmetric left and right; on the outer side of the sleeve 25, there are two symmetric support reinforcing rib plates 27 on the left and right that are parallel to the fastening surfaces of the two-piece structure 21, and there is also a support reinforcing rib plate 27 perpendicular to the fastening surface and vertical, which does not affect the connection of the fasteners while ensuring the function of support and reinforcement;

[0050] On the two-piece structure 21, the support reinforcing rib plates 27 parallel to the fastening surface are pairwise parallel and facing each other, and through holes for passing fasteners (not shown in the figure) are formed through the two support reinforcing rib plates 27 facing each other in parallel. When the two-piece structure 21 is fastened, the two support reinforcing rib plates 27 are also in a state of being in contact with each other. The fasteners are in the form of bolt connection or pin and washer connection.

[0051] Combined with the actual construction, the vertical support rod 1 is a screw rod with an external thread, and the lifting and positioning member 3 is a support lifting nut that is connected in cooperation with the screw rod. Figure 2 In, on the screw rod, below the support lifting nut is the screw rod lifting nut 4, which is used for rotatably connecting with the support vertical rod of the steel pipe scaffold. The lifting screw rod is a prior art and will not be elaborated here.

[0052] Embodiment Two

[0053] Please refer to Figure 4 and Figure 5 for comparison. The difference between Embodiment Two and Embodiment One is that the structural form in which the mold box support member 2 can be detached from the vertical support rod 1 radially (quickly) along the vertical support rod 1 is different. In this embodiment,

[0054] The mounting hole 23 and the sunk platform 24 radially penetrate through to the side surface of the mold box support member 2 through a groove 29 with the same width as their diameters. A U-shaped clamping structure is formed to facilitate detaching from the vertical support rod 1 radially (quickly) along the vertical support rod 1. The same effect of detaching from the vertical support rod 1 radially (quickly) along the vertical support rod 1 can be achieved, and four mold boxes can be effectively supported during the support use. Only a single-sided through groove 29 is provided, and the stability is slightly worse than the form of the two-piece structure 21 being fastened and connected in Embodiment One.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A support jack for early removal of formwork boxes in ribbed floor slabs, comprising a vertical support rod; characterized in that: It further includes a mold box support member. An installation hole is vertically penetrated through the mold box support member. The mold box support member is vertically slidably sleeved on the vertical support rod through the installation hole. The upper surface of the mold box support member forms a horizontal mold box support surface. The upper end surface of the vertical support rod forms a horizontal central support surface. A lifting positioning member for sliding and limiting the mold box support member on the vertical support rod is connected to the vertical support rod. The lifting positioning member is located below the mold box support member.

2. The supporting jack for early removal of formwork of ribbed floor slabs according to claim 1, characterized in that: The mold box support member and the installation hole are detachably connected by at least two split structures axially dissected along the vertical support rod.

3. The support jack for early removal of formwork for ribbed floor slabs according to claim 1 or 2, characterized in that: A horizontal top plate is fixedly connected to the upper end of the vertical support rod. The area of the upper surface of the top plate is larger than the area of the upper end surface of the vertical support rod. The upper surface of the top plate forms the central support surface. The inner diameter of the installation hole corresponds to the outer diameter of the vertical support rod. A sink is recessed on the upper surface of the mold box support member. The circumferential contour and depth of the sink correspond to the outer contour and thickness of the top plate.

4. The supporting jack for early removal of formwork boxes of ribbed floor slabs according to claim 3, characterized in that: The top plate is circular and coaxial with the vertical support rod. Correspondingly, the sink is also circular and coaxial with the installation hole.

5. The supporting jack for early removal of the ribbed floor formwork according to claim 3, characterized in that: The mold box support member includes a vertical sleeve. The top end of the sleeve is fixedly connected with a horizontal mold box support plate. The inner hole of the sleeve vertically penetrates the mold box support plate and forms the installation hole. The upper surface of the mold box support plate forms the mold box support surface. The sink is recessed on the upper surface of the mold box support plate.

6. The support jack for early removal of the formwork of the ribbed floor slab according to claim 5, characterized in that: A plurality of circumferentially spaced support reinforcing rib plates are connected between the outer circumferential surface of the sleeve and the lower surface of the mold box support plate.

7. The supporting jack for early removal of formwork for ribbed floor slabs according to claim 6, characterized in that: The mold box support member is a two-split structure axially dissected along the vertical support rod. The sleeve has two symmetric left and right support reinforcing rib plates parallel to the buckling surface of the two-split structure, and also has a support reinforcing rib plate perpendicular to the buckling surface. On the two-split structure, the support reinforcing rib plates parallel to the buckling surface are pairwise parallel and opposite. Connecting holes for passing through fasteners are penetrated through the pairwise parallel and opposite support reinforcing rib plates.

8. The supporting jack for early removal of the formwork of the ribbed floor slab according to claim 7, characterized in that: The fastener is in the form of bolt connection or pin and shim connection.

9. The supporting jack for early removal of formwork for ribbed floor slabs according to claim 1, characterized in that: A horizontal circular top plate is coaxially fixedly connected to the upper end of the vertical support rod. The area of the upper surface of the top plate is larger than the area of the upper end surface of the vertical support rod. The upper surface of the top plate forms the central support surface. A sink coaxial with the installation hole is recessed on the upper surface of the mold box support member. The inner diameter and depth of the sink correspond to the outer diameter and thickness of the top plate. The installation hole and the sink are radially penetrated to the side surface of the mold box support member through a groove with the same width as their diameters.

10. The supporting jack for early removal of formwork for ribbed floor slabs according to claim 1 or 2, characterized in that: The vertical support rod is a screw rod with an external thread. The lifting positioning member is a support lifting nut connected in cooperation with the screw rod.

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