Independently-supported, movable and adjustable post-cast strip rear formwork support combination device

Abstract

The utility model discloses an independent supporting and movable and adjustable post-cast strip post-formwork support combination device and aims to solve the problems that an existing post-cast strip support is long in supporting time and high in measure cost, influences normal construction of a construction site, is insufficient in bearing capacity and the like. The device comprises an under-beam independent support and a movable and adjustable support system under a post-cast strip. The independent support adopts a three-vertical-rod, four-vertical-rod or six-vertical-rod form according to the axial force and the cross section size of the beam, and is composed of a disc buckle type vertical rod, an adjustable top support, an adjustable bottom support and a cross rod; the post-cast strip support system comprises a pulley, a screw jack, a connecting piece, a formwork, a secondary keel, a main keel and the like, overall movement and height adjustment are achieved, an existing disc buckle type scaffold is utilized, assembling is convenient, the structure is safe and reliable, the supporting time of the post-cast strip lower formwork system is shortened, cost is reduced, meanwhile, the construction efficiency and the safety of the overall structure are improved, and the construction period is shortened. The flexibility and the high efficiency of a construction site are fully considered, the post-cast strip treatment period is shortened, and the structural stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a combined device of independent supports and movable and adjustable post-cast strip post formwork supports. Background Technique

[0002] In modern building construction, the post-cast strip technology, as a key technical means, is widely used in structural parts such as foundation slabs, walls, and beams, aiming to prevent harmful cracks caused by uneven self-shrinkage or settlement of reinforced concrete structures. The setting of the post-cast strip plays an important role in ensuring the integrity and stability of the building structure according to design or construction specification requirements. Therefore, the erection and stability of the post-cast strip support system are directly related to the quality and safety of project construction.

[0003] However, many problems have emerged in the actual application of the traditional post-cast strip formwork support system. First of all, the traditional method usually adopts the way of erecting the formwork support system synchronously with the main structure, which means that the formwork of the post-cast strip part needs to be retained from the construction of the main structure until the post-cast strip concrete is poured and completed before it can be removed. During this process, the formwork support system needs to be erected for a long time, which not only increases the construction period but also leads to a significant increase in the measure cost.

[0004] Secondly, the long-term erected post-cast strip formwork support system often occupies a large amount of construction space, interfering with the normal construction activities indoors and affecting the progress of construction. Especially in the construction site with limited space, this problem is particularly prominent.

[0005] More critically, when the traditional post-cast strip support system bears the load of the cantilever part, it often affects the safety performance of the overall structure due to insufficient bearing capacity. Especially in high-rise or super high-rise buildings, this problem is particularly serious and must be taken seriously.

[0006] For example, CN214195538U discloses a formwork support device for post-cast strip of cast-in-situ concrete floor slab. The formwork support device for post-cast strip of cast-in-situ concrete floor slab includes a floor slab, an upper formwork structure, and a bottom formwork structure. The bottom formwork structure includes a baffle and a load-bearing rod. The support structure is fixed to the top surface of the floor slab on the lower layer. The support structure includes a base, a lower screw rod, an adjusting cylinder, an upper screw rod, and a support cylinder. The jacking structure is rotatably connected to the top end of the upper screw rod. The jacking structure includes a sleeve, a turning handle, a threaded cylinder, a screw rod, a jacking column, and a fixing plate. The pressing structure is fixed to the top side wall of the support cylinder. The pressing structure includes a cross bar, a support rod, a lifting sleeve, a sliding groove, a transmission rod, a support rod, a sliding rod, a pushing block, and a sliding cylinder. However, the integrity of this device is poor, the bearing capacity of a single vertical rod cannot be guaranteed, and the adjustable height is only the threaded cylinder, with low flexibility. The disassembly, assembly, and movement of this device are all inconvenient, and the erection time of this device is long, affecting normal construction and its construction efficiency.

[0007] In view of the above problems, there is an urgent need in the industry for a post-cast strip formwork support system that can effectively shorten the support time, reduce measure costs, avoid construction interference, and improve the structural safety performance. This utility model patent came into being precisely in this context. By innovatively designing an independent support and a movable and adjustable post-cast strip post-support formwork support combination system, it aims to solve the pain points and difficulties in the prior art. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide an independent support and a movable and adjustable post-cast strip post-support formwork support combination device, and solve the technical problems of long support time, high measure costs, affecting normal construction on the construction site, insufficient bearing capacity, inconvenient movement, and inability to adjust the height existing in the prior art of post-cast strip formwork support.

[0009] To solve the above technical problems, the technical solution adopted by this utility model is an independent support and a movable and adjustable post-cast strip post-support formwork support combination device, which includes an independent support under the beam and a post-cast strip lower support system. The independent support under the beam includes an adjustable bottom bracket and an adjustable top bracket, which are connected into one body through a socketed vertical rod. Between two socketed vertical rods, they are further connected by a cross bar and a diagonal brace to form a three-vertical-rod independent support, a four-vertical-rod independent support, or a six-vertical-rod independent support. The post-cast strip lower support system includes several groups of adjustable bottom brackets, socketed vertical rods, and adjustable top brackets assembled in sequence, and several groups of adjustable bottom brackets, socketed vertical rods, jacks, and their pulleys assembled in sequence. Between two socketed vertical rods, they are further connected and assembled together by a cross bar and a diagonal brace. A main keel is installed on the top of the adjustable top bracket, a secondary keel is installed on the main keel, and a formwork is installed on the top of the secondary keel.

[0010] In a preferred solution, the number of independently supported disc-shaped uprights under the beam is determined according to the magnitude of the axial force of the independent support points, and the spacing between the disc-shaped uprights is determined according to the cross-sectional dimensions of the beam.

[0011] In a preferred solution, the disc-type upright pole comprises a fastener-type detachable steel pipe, and the disc-type upright pole is connected to the cross bar or the diagonal brace through a connecting plate and a buckle joint installed on the fastener-type detachable steel pipe.

[0012] In a preferred solution, the pulley is detachably mounted on the bottom of the jack and is used to move the bracket assembly as a whole.

[0013] In a preferred solution, the jack is a screw jack, which is detachably connected to the disc-type vertical pole.

[0014] In a preferred solution, the template is made of bamboo plywood, the secondary keel is overlapped on the template, and the main keel is connected to the adjustable top support, together forming a stable top support system.

[0015] In a preferred solution, the secondary keel is made of square wood for overlapping the formwork.

[0016] In a preferred solution, the main keel is made of channel steel and is connected to the adjustable top support.

[0017] The independent support and movable and adjustable post-casting strip rear formwork support assembly device proposed in this utility model has the following beneficial effects:

[0018] 1. The utility model solves the specific technical problems existing in the technical field of post-casting strip formwork support, such as long support time, high cost of measures, affecting normal construction on the construction site, insufficient bearing capacity, inconvenient movement and inability to adjust the height;

[0019] 2. This system uses a new type of independent support system with diversified designs. The independent supports are divided into three different designs: three poles, four poles or six poles. The independent supports can be flexibly selected according to the axial force of the independent support points and the cross-sectional dimensions of the beam. This diversified design meets the needs of different construction scenarios.

[0020] 3. The utility model has a unique combination of components. Its independent support consists of a disc-type vertical rod, an adjustable top support, an adjustable bottom support and a crossbar. The combination of these components is relatively rare in traditional support systems, which improves the stability and adaptability of the system.

[0021] 4. The pulley and jack combination design of the utility model is to install the pulley and screw jack at the bottom of the support system, so as to realize the overall movement and height adjustment of the support system, which is unprecedented in the traditional post-casting strip formwork support system;

[0022] 5. The utility model facilitates the implementation of phased pouring and demolition by setting up independent supports under the beams, full-floor scaffolding, and post-casting support systems in stages, thereby improving construction efficiency. At the same time, the components can be reused, saving construction costs.

[0023] 6. The structural design of the utility model facilitates the rapid demoulding and movement of the device. When demoulding, the support system can be quickly moved and lowered by the jack and pulley, saving labor and time.

[0024] 7. The device of the utility model has the advantages of easy assembly, safe and reliable structure, convenient construction, cost saving, etc., and has guiding significance for the construction of concrete structures with post-cast strips;

[0025] 8. The design of this utility model fully considers the flexibility and efficiency of the construction site. It not only significantly shortens the processing cycle of the post-casting strip, but also ensures the stability of the structural quality through precise adjustment. It is an indispensable technological innovation in modern building construction.

[0026] 9. The promotion and application of this utility model will significantly improve the technical level of post-casting strip formwork support construction, reduce resource waste, promote green construction, and become a highlight of the post-casting strip formwork support technology innovation in the construction industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and implementation examples:

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the three-pole independent support structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the four-pole independent support structure of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the six-pole independent support structure of the utility model;

[0032] Figure 5 This is a structural diagram of the support system under the post-casting belt of the utility model;

[0033] Figure 6 It is a partial cross-sectional view of the top view of the lower support system of the post-casting belt of the utility model;

[0034] Figure 7 This is the elevation view of a single independent support scaffolding of the utility model;

[0035] Figure 8 This is the elevation view of the double-pole independent support scaffolding of the utility model;

[0036] Figure 9 This is the elevation view of the three-pole independent support scaffolding of the utility model;

[0037] In the figure: three-pole independent support 1, four-pole independent support 2, six-pole independent support 3, disc-type pole 4, adjustable top support 5, adjustable bottom support 6, cross bar 7, pulley 8, jack 9, template 10, secondary keel 11, main keel 12, diagonal brace 13. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] like Figures 1 - 9 As shown, an independent support and movable and adjustable post-casting strip formwork support combination device includes an independent support under the beam and a support system under the post-casting strip, the independent support under the beam includes an adjustable bottom support 6 and an adjustable top support 5, the two are connected as a whole through a disc-type vertical rod 4, and the two disc-type vertical rods 4 are connected by a cross bar 7 and an oblique brace 13 to form a three-upright independent support 1, a four-upright independent support 2 or a six-upright independent support 3, the support system under the post-casting strip includes several groups of adjustable bottom supports 6, disc-type vertical rods 4 and adjustable top supports 5 assembled in sequence, and several groups of adjustable bottom supports 6, disc-type vertical rods 4, jacks 9 and their pulleys 8 assembled in sequence, and the two disc-type vertical rods 4 are connected and assembled together by a cross bar 7 and an oblique brace 13, the top of the adjustable top support 5 is installed with a main keel 12, the main keel 12 is installed with a secondary keel 11, and the top of the secondary keel 11 is installed with a template 10.

[0041] In this embodiment, the number of the independently supported disc-shaped uprights 4 under the beam is determined according to the magnitude of the axial force of the independent support points, and the spacing between the disc-shaped uprights 4 is determined according to the cross-sectional dimensions of the beam.

[0042] Furthermore, the disc-type upright pole 4 includes a fastener-type detachable steel pipe, and the disc-type upright pole 4 is connected to the cross bar 7 or the diagonal brace 13 through a connecting plate and a buckle joint installed on the fastener-type detachable steel pipe.

[0043] Furthermore, the pulley 8 is detachably mounted on the bottom of the jack 9 for moving the bracket assembly as a whole.

[0044] Furthermore, the jack 9 is a screw jack, which is detachably connected to the disc-type vertical pole 4.

[0045] Furthermore, the template 10 is made of bamboo plywood, the secondary keel 11 is overlapped on the template 10, and the main keel 12 is clamped with the adjustable top support 5, together forming a stable top support system.

[0046] Furthermore, the secondary joist 11 is made of square timber and is used to lap the formwork 10.

[0047] Furthermore, the main joist 12 is made of channel steel and is clamped with the adjustable head 5.

[0048] During specific use, after each component is processed and inspected to be qualified, according to the area where the post-cast strip is set and the structural layout, determine the position of the independent support and the magnitude of the axial force of the independent support to select the number of independent support vertical poles, and erect the independent support under the beam; erect the full hall scaffolding; pour the concrete of this layer, and do not pour the concrete at the post-cast strip position; cure the concrete to the specified strength, and remove the full hall scaffolding according to the specification requirements; before pouring the post-cast strip concrete, erect the post-cast strip post-formwork support system. First, erect the socketed vertical pole 4, then connect the cross bar 7 and the diagonal brace 13, and then erect the main joist 12, the secondary joist 11 and the formwork 10. The post-formwork support system under the post-cast strip between adjacent columns is taken as a unit. A jack 9 with a pulley 8 is arranged under the second row of vertical poles near the end of each unit. After the post-cast strip post-formwork support is erected, jack up the support to the design height through the jack 9, lower the adjustable sole plate 6 of the remaining vertical poles to the top of the lower layer slab and fix it, remove the jack 9, and lower the adjustable sole plate of the vertical pole where the jack 9 is located to the top of the lower layer slab; pour the concrete in the post-cast strip area; cure the concrete in the post-cast strip area to the demoulding strength specified by the specification; when demoulding, first loosen the adjustable sole plate 6 of the vertical pole where the jack 9 needs to be erected, then place the jack 9, and loosen the adjustable sole plate 6 of the remaining vertical poles; lower the jack 9 to a suitable position and move the device to the new position required.

[0049] Embodiment 2

[0050] In another preferred embodiment, on the basis of the above Embodiment 1, refer to the attached Figures 1 - 9 , and specifically describe the structure, function and its application in practice of the independent support and the movable and adjustable post-cast strip post-formwork support combination device through this embodiment:

[0051] Step S1: Erection of the independent support under the beam

[0052] First, according to the area where the post-cast strip is set and the structural layout, determine the position of the independent support and the magnitude of the axial force of the independent support; select the number of independent support vertical poles according to the magnitude of the axial force, which can be a three-vertical-pole independent support 1, a four-vertical-pole independent support 2, or a six-vertical-pole independent support 3; the independent support consists of a socketed type vertical pole 4, an adjustable top support 5, an adjustable bottom support 6, and a cross bar 7; the number of socketed type vertical poles 4 is determined according to the magnitude of the axial force at the independent support point, and the spacing of the socketed type vertical poles 4 is determined according to the cross-sectional dimension of the beam; according to the design requirements, set up the independent support under the beam, and the form and connection method of each component refer to the standard of "Socketed Type Steel Tube Scaffold for Building Construction" (JGJ / T 231-2021), ensuring the standardization and normalization of the system and the stability and reliability of the support.

[0053] Step S2: Erection of the full hall scaffold

[0054] After the erection of the independent support under the beam is completed, carry out the erection of the full hall scaffold; the erection of the full hall scaffold shall follow the relevant construction specifications to ensure the stability and safety of the scaffold.

[0055] Step S3: Pouring of concrete

[0056] After the erection of the full hall scaffold is completed, carry out the pouring of the concrete for this floor; it should be noted that during the pouring process, the concrete at the post-cast strip position cannot be poured and needs to be processed in subsequent steps.

[0057] Step S4: Curing of concrete and removal of the full hall scaffold

[0058] After the poured concrete is cured to the specified strength, remove the full hall scaffold according to the specification requirements; at this time, the formwork support system at the post-cast strip position needs to be retained for subsequent construction.

[0059] Step S5: Erection of the post-cast strip post-formwork support system

[0060] Before pouring the concrete of the post-cast strip, erect the post-cast strip post-formwork support system; first, erect the socketed type vertical pole 4, and connect the cross bar 7 and the diagonal brace 13 to form a stable support structure. Subsequently, erect the main keel 12, the secondary keel 11, and the formwork 10. The post-formwork support system under the post-cast strip between adjacent columns is taken as a unit. A jack 9 with a pulley 8 is set under the second row of vertical poles near the end of each unit. The jack 9 is a screw jack, model HUGO [215~485] large size, with a maximum lifting capacity of 3~5T. The pulley 8 adopts a model Molun 4-inch load-bearing nylon universal wheel. The jack 9 is connected to the socketed type vertical pole 4. After the erection of the post-cast strip post-formwork support is completed, lift the support to the design height through the jack 9, lower the adjustable bottom support 6 of the remaining vertical poles to the top of the lower layer slab, and fix them. Remove the jack 9, and lower the adjustable bottom support 6 of the vertical pole where the jack 9 is located to the top of the lower layer slab.

[0061] Step S6: pouring concrete in the post-cast zone area

[0062] After the post-casting zone support system is erected and adjusted, the concrete in the post-casting zone area is poured.

[0063] Step S7: Curing concrete in the post-cast zone

[0064] After the concrete in the post-casting zone area has been cured to the formwork-removable strength specified in the specifications, proceed to the next step.

[0065] Step S8: Dismantle or completely remove the support system under the post-casting belt

[0066] When removing the formwork, first loosen the adjustable base support 6 that needs to be installed with the jack 9, then place the jack 9, loosen the adjustable base supports 6 of the remaining vertical poles, lower the jack 9 to the appropriate position, and move the device as a whole to the required new position. At this time, the support system under the post-casting belt can be moved or removed as a whole for subsequent construction.

[0067] The description of the above specific embodiments fully demonstrates the diversity and practicality of the independent support system and the movable and adjustable post-casting strip post-formwork support system of the present invention, highlighting the innovation of the present invention.

[0068] In the preferred solution, the number of independently supported disc-shaped uprights 4 under the beam is determined according to the magnitude of the axial force of the independent support points, and the spacing of the disc-shaped uprights 4 is determined according to the cross-sectional dimensions of the beam; the above arrangement ensures the stability and safety of the supporting structure, effectively disperses the load on the beam body, and avoids local stress concentration; at the same time, the solution also takes into account the convenience of construction, making the installation and adjustment of the uprights more flexible and efficient.

[0069] In the preferred solution, the disc-type upright 4 includes a fastener-type detachable steel pipe, and the disc-type upright 4 is connected to the cross bar 7 or the diagonal brace 13 through a connecting plate and a buckle joint installed on the fastener-type detachable steel pipe; the above arrangement realizes the rapid assembly and disassembly of the disc-type upright 4 and the cross bar 7 and the diagonal brace 13, thereby improving construction efficiency and flexibility; at the same time, the disc-type structure enhances the overall stability and ensures safety and reliability during the construction process.

[0070] In the preferred solution, the pulley 8 can be detachably mounted on the bottom of the jack 9 for moving the bracket assembly as a whole; the above arrangement not only enhances the flexibility of the device, but also facilitates quick position adjustment in different working scenarios; at the same time, the design of the jack 9 fully considers the load-bearing capacity and stability to ensure safety and reliability when lifting heavy objects.

[0071] In a preferred embodiment, the jack 9 is a screw jack and is detachably connected to the socket steel pipe upright 4. The above arrangement enables the jack 9 to be quickly installed on the socket steel pipe upright 4 when needed to provide stable supporting force, and at the same time is convenient for disassembly and storage when not in use, enhancing the flexibility and practicability of the overall structure.

[0072] In a preferred embodiment, the formwork 10 is made of bamboo plywood. The secondary joists 11 are lapped on the formwork 10, and the main joists 12 are clamped with the adjustable head 5 to jointly form a stable top support system. The above arrangement not only ensures the flatness and stability of the formwork 10, but also enhances the load-bearing capacity of the overall structure through the close cooperation between the secondary joists 11 and the main joists 12, significantly improving the safety performance during the construction process.

[0073] In a preferred embodiment, the secondary joists 11 are made of square timbers and are used to lap the formwork 10. The above arrangement not only enhances the overall stability of the formwork 10 system, but also facilitates adjustment and fixation during the construction process, effectively improving the construction efficiency and structural safety. At the same time, the selection of square timber material also takes into account cost-effectiveness and environmental protection requirements.

[0074] In a preferred embodiment, the main joists 12 are made of channel steels and are clamped with the adjustable head 5. The above arrangement not only ensures the stability of the structure, but also facilitates height adjustment according to actual needs, enhancing the flexibility and efficiency of construction. At the same time, the selection of channel steel material also improves the overall load-bearing capacity, ensuring construction safety without worry.

[0075] In summary, the independent support and movable and adjustable post-cast strip back-support formwork support combination device provided by the present utility model solves the specific technical problems existing in the existing post-cast strip formwork support technology field, such as long support time, high measure cost, affecting normal construction of the construction site, and insufficient bearing capacity. The independent support system and the movable and adjustable support system of the present utility model are combined to significantly reduce the support time of the post-cast strip under-support and reduce the measure cost. Its independent support system can effectively transfer structural loads, prevent the post-cast strip under-support system from being overloaded, and improve the safety performance of the overall structure. The present utility model innovatively uses pulleys 8 and screw jacks 9 at the bottom of the support system to realize the overall movement and height adjustment of the support combination device, which is a major improvement to the traditional support system. Each component of its support device adopts a modular design, which is convenient for assembly and disassembly, improving the flexibility and convenience of construction. The device has the advantages of convenient assembly, safe and reliable structure, convenient construction, and cost savings, and has guiding significance for the construction of concrete structures with post-cast strips. At the same time, the design of the device fully considers the actual situation of on-site construction, effectively shortens the construction period, reduces the input of manpower and material resources, improves the construction efficiency, and is an important direction for the future development of post-cast strip formwork support technology.

Claims

1. An independent support and movable and adjustable combined device for the back support formwork of post-cast strips, characterized in that: It includes independent supports under the beam and the support system under the post-cast strip. The independent supports under the beam include an adjustable base support (6) and an adjustable top support (5), which are connected into one body through a socketed upright rod (4). Between every two socketed upright rods (4), they are further connected by a cross bar (7) and a diagonal brace (13) to form a three-upright-rod independent support (1), a four-upright-rod independent support (2) or a six-upright-rod independent support (3). The support system under the post-cast strip includes several groups of adjustable base supports (6), socketed upright rods (4) and adjustable top supports (5) assembled in sequence, and several groups of adjustable base supports (6), socketed upright rods (4), jacks (9) and their pulleys (8) assembled in sequence. Between every two socketed upright rods (4), they are further connected and assembled together by a cross bar (7) and a diagonal brace (13). A main keel (12) is installed on the top of the adjustable top support (5), a secondary keel (11) is installed on the main keel (12), and a formwork (10) is installed on the top of the secondary keel (11).

2. The independent support and movable and adjustable post-cast strip post-shuttering support combination device according to claim 1, wherein: The number of socketed upright rods (4) of the independent supports under the beam is determined according to the magnitude of the axial force at the independent support points, and the spacing of the socketed upright rods (4) is determined according to the cross-sectional dimension of the beam.

3. The independently supported and movable and adjustable post-casting strip formwork support assembly device according to claim 1 is characterized in that: The socketed upright rod (4) includes a fastener-type detachable steel pipe, and the socketed upright rod (4) is connected to the cross bar (7) or the diagonal brace (13) through a connecting plate and a fastening joint installed on the fastener-type detachable steel pipe.

4. The independent support and movable and adjustable post-cast strip post-shuttering support combination device according to claim 1, characterized in that: The pulley (8) is detachably installed at the bottom of the jack (9) and is used for the overall movement of the support combination device.

5. The independent support and movable and adjustable post-cast strip post-shuttering support combination device according to claim 1, characterized in that: The jack (9) is a screw jack and is detachably connected to the socketed upright rod (4).

6. The combined device of the independent support and the post-cast strip post-shuttering support that is movable and adjustable according to claim 1, wherein: The formwork (10) is a bamboo plywood. The secondary keel (11) is lapped on the formwork (10), and the main keel (12) is clamped with the adjustable top support (5) to jointly form a stable top support system.

7. The independent support and movable and adjustable post-cast strip back formwork support combination device according to claim 1, wherein: The secondary keel (11) is made of square timber and is used for lapping the formwork (10).

8. The independent support and movable and adjustable post-cast strip back-support formwork support combination device according to claim 1, characterized in that: The main keel (12) is made of channel steel and is clamped with the adjustable top support (5).

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