Formwork supporting system suitable for concrete building structure construction

Abstract

The utility model relates to the technical field of building construction, and particularly discloses a formwork supporting system suitable for concrete building structure construction, which comprises a plurality of groups of beam formwork supporting units, a plurality of groups of column formwork supporting units, a plurality of groups of wall formwork supporting units and an early-dismantling plate formwork supporting unit, the beam formwork supporting unit, the column formwork supporting unit and the wall formwork supporting unit are matched with one another to form a mounting cavity used for mounting the early-dismantling plate formwork supporting unit, and the early-dismantling plate formwork supporting unit is connected with the wall formwork supporting unit and the beam formwork supporting unit. The early-dismantling plate formwork supporting unit comprises a plurality of sets of vertical telescopic rod pieces which are arranged in the vertical direction and adjustable in length, back ridge assemblies used for connecting every two adjacent sets of vertical telescopic rod pieces and used for supporting plate formworks, and cantilever supporting pieces installed on the back ridge assemblies. On the basis of meeting the application safety and supporting function characteristics of a concrete cast-in-place structure, the prefabricated concrete structure is suitable for fabricated concrete buildings, material waste is reduced, and light-weight supporting is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and more specifically, to a formwork support system suitable for the construction of concrete building structures. Background Art

[0002] The current formwork support systems suitable for the construction of concrete building structures include aluminum alloy formwork systems, socketed disk buckle support systems, fastener support systems, etc.

[0003] When using traditional support systems such as fastener type and socketed disk buckle type, in order to ensure the stability of the support system framework, a large number of horizontal crossbars and diagonal bars need to be set. The material consumption is large, and the space below is narrow after the vertical and horizontal crossbars and diagonal bars are arranged, which is not conducive to the management personnel or workers walking through. Especially in recent years, with the rapid development of precast concrete buildings, the support formwork system still largely uses the traditional full hall formwork layout method, which also causes a large amount of material waste; in recent years, the application of aluminum alloy formwork plus independent support has gradually become rich, and the large space below provides great convenience for workers to walk, but the application of aluminum formwork requires special formwork design, and the cost is relatively high compared with wooden formwork. At the same time, the high-precision characteristics of aluminum formwork lack sufficient adjustment tolerance, resulting in position conflicts with civil engineering structure construction.

[0004] However, there is a lack of a support system in the prior art that, while meeting the application safety and support function characteristics of cast-in-place concrete structures, is also suitable for precast concrete buildings, reduces material waste, and realizes lightweight support. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a formwork support system suitable for the construction of concrete building structures, which is suitable for precast concrete buildings while meeting the application safety and support function characteristics of cast-in-place concrete structures, reduces material waste, and realizes lightweight support;

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A formwork support system suitable for the construction of concrete building structures includes multiple groups of beam formwork support units, multiple groups of column formwork support units, multiple groups of wall formwork support units, and early demolition slab formwork support units; the beam formwork support units, column formwork support units, and wall formwork support units cooperate with each other to form an installation cavity for installing the early demolition slab formwork support units, and the early demolition slab formwork support units are respectively connected to the wall formwork support units and the beam formwork support units;

[0008] Specifically, the wall formwork support unit or the beam formwork support unit is arranged between two adjacent groups of column formwork support units;

[0009] The early-demolition formwork support unit includes multiple groups of vertically arranged vertical telescopic members with adjustable lengths, a backrest component for connecting adjacent two groups of vertical telescopic members and for supporting the formwork, and a cantilever support member installed on the backrest component and located in the gap formed between the backrest component and the beam formwork and / or wall formwork;

[0010] The backrest component includes a horizontal backrest and a vertical backrest respectively connected to the corresponding vertical telescopic members;

[0011] Sliders are respectively arranged on the horizontal backrest and the vertical backrest; the sliders slide along the length direction of the horizontal backrest or the vertical backrest;

[0012] One end of the cantilever support member is detachably connected to the outermost horizontal backrest or vertical backrest in the early-demolition formwork support unit and is perpendicular to each other.

[0013] In some possible implementation manners, the slider has a U-shaped structure with the opening facing downwards; it includes a support plate arranged above the horizontal backrest or the vertical backrest, vertical plates respectively connected to both ends of the support plate and arranged in parallel, and a convex platform arranged on the side where the two vertical plates are close to each other and inserted and matched with the horizontal backrest or the vertical backrest; multiple groups of jacks for cooperating with the convex platform are arranged on the horizontal backrest or the vertical backrest along its length direction.

[0014] In some possible implementation manners, the vertical telescopic member includes a support disc connected to the end of the backrest component, an adjustment screw rod sleeved inside the support disc, a support rod sleeved outside the adjustment screw rod and located below the support disc, and a limiting member for restricting the relative vertical movement between the support disc and the adjustment screw rod and between the adjustment screw rod and the support rod;

[0015] A through hole for the end of the adjustment screw rod far from the support rod to pass through is arranged on the support disc; the limiting member includes two groups of adjustment nuts sleeved outside the adjustment screw rod and screwed with the adjustment screw rod.

[0016] In some possible implementation manners, multiple groups of installation holes are arranged on the support disc, and the distances from the centers of the multiple groups of installation holes to the center of the support disc are equal and are arranged at equal intervals; round platforms for cooperating with the installation holes are arranged at the bottoms of the horizontal backrest and the vertical backrest;

[0017] The horizontal backrest and the vertical backrest on the same support disc cooperate with each other to form a chamber, and a support block is arranged in the chamber on the support disc, and the top surface of the support block is on the same plane as the top surface of the formwork; the end of the adjustment screw rod far from the support rod passes through the support disc and is connected to the support block.

[0018] In some possible embodiments, the cantilever support member includes a fixed pipe connected to the backing rib assembly, a telescopic pipe sleeved with the fixed pipe and telescoping along the length direction of the fixed pipe, and a locking member for fixing the telescopic pipe and the fixed pipe; the locking member includes a locking waist-shaped hole arranged along the length direction of the fixed pipe, a through hole arranged on the telescopic pipe and corresponding to the locking waist-shaped hole, and a locking bolt.

[0019] In some possible embodiments, when the cantilever support member is located between the backing rib assembly and the wall formwork, one end of the telescopic pipe away from the fixed pipe is connected to the wall formwork support unit;

[0020] The locking member further includes a tooth groove arranged on the outer side surface of the fixed pipe and on the same side as the locking waist-shaped hole, and a tooth plate that is used in cooperation with the tooth groove and sleeved outside the locking bolt; the tooth grooves are multiple groups and arranged along the long axis direction of the locking waist-shaped hole, and the length direction of each group of tooth grooves is perpendicular to the length direction of the fixed pipe.

[0021] In some possible embodiments, the beam formwork support unit includes multiple groups of beam bottom supports arranged along the length direction of the beam formwork and vertically height-adjustable, and two horizontal tie rods arranged along the length direction of the beam formwork and connected to the beam bottom supports.

[0022] In some possible embodiments, in order to effectively support and fix the beam formwork and provide a good passage space under the beam;

[0023] The beam bottom support includes at least two groups of vertical rods arranged in parallel and respectively connected to the two horizontal tie rods, a cross bar for connecting adjacent two groups of vertical rods, a vertical adjustment support installed at the bottom of the vertical rod, a beam bottom rod for the vertical rod, the horizontal tie rod, and the vertical telescopic member adjacent to the horizontal tie rod, and a beam bracket installed at the top of the vertical rod and used for supporting the bottom of the beam formwork;

[0024] The beam bottom rod includes a horizontal connecting rod for connecting the vertical rod and the support rod in the vertical telescopic member, and two diagonal connecting rods arranged in a cross shape and used for connecting all the vertical rods and the support rods in the vertical telescopic member; the connection point of the diagonal connecting rod and the support rod is arranged at one end of the support rod close to the adjustment screw.

[0025] In some possible embodiments, in order to effectively support and fix the wall formwork;

[0026] The wall formwork support unit includes an outer support, an inner support having the same structure as the outer support and forming a shear wall cavity through tension members, and a ground-pulling diagonal brace for connecting the inner support and the base surface; the shear wall cavity is respectively communicated with the column cavity formed by the column formwork support unit;

[0027] The inner support includes a transverse backstrap arranged horizontally in the vertical direction and connected to the cantilever support member, multiple groups of vertical adjustable backstraps connected to the transverse backstrap and arranged vertically and acting on the base surface, and a connecting member for connecting the transverse backstrap and the vertical adjustable backstrap.

[0028] In some possible implementation manners, in order to effectively realize the connection between the transverse backstrap and the vertical adjustable backstrap;

[0029] The connecting member includes a U-shaped buckle arranged between the vertical adjustable backstrap and the transverse backstrap and connected to them respectively; U-shaped card slots are respectively arranged on one side of the U-shaped buckle close to the vertical adjustable backstrap and on one side close to the transverse backstrap; the transverse backstrap and the U-shaped buckle are slidably matched along the length direction of the transverse backstrap and fixedly connected through a pin shaft, and the transverse backstrap and the U-shaped buckle are slidably matched along the length direction of the vertical adjustable backstrap and fixedly connected through a tapered card.

[0030] In order to effectively fix the tie member so that the outer mold and the inner mold can be effectively matched; each group of the transverse backstraps includes two parallel and identically structured backstrap bars and ends for fixing the two ends of the backstrap bars; a gap for the tie member to pass through is formed between the two backstrap bars.

[0031] In order to effectively realize the connection between two adjacent groups of transverse backstraps on the same horizontal plane; a backstrap connecting member is arranged between two groups of transverse backstraps on the same horizontal plane.

[0032] The backstrap connecting member is provided with a T-shaped chute with a small-end opening and two clamping pieces with one end extending into the T-shaped chute and slidably matched with the backstrap connecting member; a clamping groove for clamping the vertical adjustable backstrap is formed between the two clamping pieces; one ends of the two groups of transverse backstraps close to each other are located in the T-shaped chute and slidably matched with the T-shaped chute.

[0033] Compared with the prior art, the beneficial effects of the present utility model are:

[0034] In the present utility model, the backstrap assembly can, on the one hand, realize the connection between the slab molds, and on the other hand, can effectively realize the connection between adjacent vertical telescopic members, so that all the vertical telescopic members form an integral structure, and there is no need to additionally increase horizontal connecting members to realize the connection of the vertical telescopic members, so that normal passage can be carried out below the slab mold without being interfered by the horizontal connecting members, greatly improving the construction efficiency.

[0035] The utility model is connected to the backing rib assembly through a support disc. The support disc is in screwed cooperation with an adjusting screw rod. The formwork is installed on the backing rib assembly. After the strength of the concrete poured on the formwork meets the requirements, the support disc is controlled to move towards the side close to the support rod, thereby driving the backing rib assembly and the formwork supported by the backing rib assembly to move; further separating the formwork from the concrete; during the entire formwork removal process, the adjusting screw rod is fixed relative to the support rod and will not move vertically, so that the adjusting screw rod can effectively support the concrete; thus realizing the early removal of the formwork.

[0036] The utility model is structured by arranging sliders made of plastic material on the backing rib body. Through the sliders, the support and fixation with the formwork are effectively achieved, and at the same time, a gap is formed between the backing rib body and the formwork, which is convenient for construction personnel to hang construction tools during the construction process, greatly increasing the construction convenience; at the same time, this gap can also be used to hang horizontal connecting pieces between two groups of parallel horizontal backing ribs when a relatively large installation space is formed to strengthen the connection between the horizontal backing ribs; during the construction of the composite slab, the formed gap will be used to install the composite slab, and the slider will effectively limit the composite slab.

[0037] The utility model is structured by arranging connecting rods between adjacent horizontal backing ribs and vertical backing ribs on the same support disc, effectively strengthening the connection between the horizontal backing ribs and the vertical backing ribs, and forming a stable overall structure with the vertical telescopic rod assembly.

[0038] The utility model can effectively realize the early removal of the formwork. By interrupting the vertical backing ribs and horizontal backing ribs at the beam formwork support unit, it can flexibly adapt to the adjustment of civil engineering installation errors and the installation requirements of wooden formwork; the beam formwork support can achieve vertical adjustment, strengthen the beam support constraint under the beam through diagonal connecting rods and horizontal connecting rods, and strengthen the connection integrity between the beam and the support under the slab to form a force transmission mechanism; on the wall side, the vertical backing ribs and the horizontal backing ribs are connected into a whole through connecting pieces, tensioning assemblies, etc. The early removal formwork support unit and the horizontal backing rib are connected by a cantilever support to achieve the transmission of horizontal force; at the same time, by setting a ground-leaning diagonal brace, the horizontal force can be transmitted to the lower floor slab while ensuring a large internal space.

[0039] Compared with the full hall scaffolding support system in the prior art, in the utility model, the horizontal tie rod is arranged at one end of the vertical rod close to the bottom of the beam. The horizontal tie rod connects multiple groups of beam support members to form a doorway for construction personnel to pass through; at the same time, since the horizontal backing ribs and vertical backing ribs are used to connect the vertical telescopic members in the early removal formwork support unit, there are no horizontally connected rods that are interconnected and interfere with passage under the entire formwork system, which is convenient for the passage of construction personnel and construction machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a structural schematic diagram of the utility model;

[0041] Figure 2 is the top view of the present utility model;

[0042] Figure 3 is Figure 2 the enlarged view of part A in

[0043] Figure 4 is the three-dimensional structure schematic diagram of the present utility model;

[0044] Figure 5 is the structure schematic diagram of the vertical telescopic member in the present utility model;

[0045] Figure 6 is the bottom view of the connection relationship among the support disc, the back rib assembly and the vertical telescopic member in the present utility model;

[0046] Figure 7 is the connection relationship diagram among the support disc, the back rib assembly and the vertical telescopic member in the present utility model;

[0047] Figure 8 is the top view of the vertical telescopic member in the present utility model;

[0048] Figure 9 is the structure schematic diagram of the slider in the present utility model;

[0049] Figure 10 is the structure schematic diagram of the back rib assembly in the present utility model;

[0050] Figure 11 is the structure schematic diagram of the connecting rod in the present utility model;

[0051] Figure 12 is the structure schematic diagram of the beam formwork support unit in the present utility model;

[0052] Figure 13 is the axonometric schematic diagram of the beam formwork support unit in the present utility model;

[0053] Figure 14 is the connection relationship schematic diagram among the wall formwork support unit and the early removal formwork support unit in the present utility model;

[0054] Figure 15 is the axonometric schematic diagram of the wall formwork support unit in the present utility model;

[0055] Figure 16 is the connection relationship schematic diagram between the horizontal back rib and the longitudinal back rib in the present utility model;

[0056] Figure 17 the structure schematic diagram of the connecting piece in the present utility model;

[0057] Figure 18Schematic diagram of the inner connection relationship among two adjacent groups of horizontal back ribs, back rib connectors, and vertical back ribs in the present utility model;

[0058] Figure 19 Schematic diagram of the structure of the cantilever support member in the present utility model;

[0059] Wherein: 1 - beam formwork support unit, 11 - beam bottom support member, 111 - vertical rod, 112 - horizontal rod, 113 - beam bottom rod, 1131 - diagonal connecting rod, 1132 - horizontal connecting rod, 114 - beam bracket, 12 - horizontal tie rod, 2 - column formwork support unit, 3 - wall formwork support unit, 31 - outer support, 311 - horizontal back rib, 3110 - back rib strip, 3111 - kidney-shaped hole, 3112 - end, 312 - vertically adjustable back rib, 3121 - circular hole, 313 - connector, 3130 - U-shaped card slot, 3131 - long slot one, 314 - tapered card, 32 - inner support, 33 - back rib connector, 331 - T-shaped chute, 332 - clip, 333 - clamping groove, 334 - long slot two, 34 - ground pull diagonal brace; 4 - early removal formwork support unit, 41 - vertically telescopic member, 411 - support disc, 4111 - mounting hole, 412 - adjusting screw, 413 - support rod, 414 - limiting member, 415 - support block, 42 - back rib assembly, 421 - horizontal back rib, 4211 - connecting pipe, 42111 - frustum, 4212 - back rib body, 42121 - jack, 422 - longitudinal back rib, 423 - slider, 4231 - boss, 43 - connecting rod, 431 - U-shaped clip, 5 - cantilever support member, 51 - fixed pipe, 52 - telescopic pipe, 53 - locking member, 531 - locking bolt, 532 - tooth groove, 533 - tooth plate. Specific implementation manners

[0060] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not indicate a quantity limit, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of this application, unless otherwise stated, the meaning of "a plurality" refers to two or more. For example, a plurality of positioning posts means two or more positioning posts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] The following is a detailed description of the present utility model.

[0062] As Figures 1 - 19 shown, a formwork support system applicable to the construction of concrete building structures includes multiple groups of beam formwork support units 1 for supporting and fixing beam formworks, multiple groups of column formwork support units 2 for supporting and fixing column formworks, multiple groups of wall formwork support units 3 for supporting and fixing wall formworks, and an early demolition formwork support unit 4 for supporting and fixing slab formworks and capable of realizing early demolition of the slab formwork when the concrete strength of the floor slab meets the requirements and effectively supporting the cast floor slab; the beam formwork support units 1, column formwork support units 2, and wall formwork support units 3 cooperate with each other to form an installation cavity for installing the early demolition formwork support unit 4, and the early demolition formwork support unit 4 is respectively connected to the wall formwork support unit 3 and the beam formwork support unit 1;

[0063] Specifically, the wall formwork support unit 3 or the beam formwork support unit 1 is arranged between two adjacent groups of column formwork support units 2; the specific position of the wall formwork support unit 3 is set according to the wall designed in the design drawing; the specific position of the beam formwork support unit 1 is set according to the wall designed in the design drawing;

[0064] The early demolition formwork support unit 4 includes multiple groups of vertically arranged and length-adjustable vertical telescopic members 41, a back member assembly 42 for connecting two adjacent groups of vertical telescopic members 41 and for supporting the formwork slab, and a cantilever support member 5 installed on the back member assembly 42 and located in the gap formed by the back member assembly 42 and the beam formwork and / or wall formwork;

[0065] Generally, for the convenience of construction, the gap between the early removal formwork support unit and the wall formwork support unit 3 and the beam formwork support unit 1 is 300 - 350 mm; however, during the construction process, when the gap formed between the beam formwork support unit 1 and the early removal formwork support unit 4 is 300 mm or more, a cantilever support member 5 needs to be added to support the formwork through the cantilever support member 5;

[0066] The cantilever support member 5 mainly supports the bottom of the formwork near the wall formwork or the beam formwork side, avoiding the situation of insufficient support due to a large gap, which affects the normal pouring of the floor slab; at the same time, when the cantilever support member 5 is used between the backing member assembly 42 and the wall formwork support unit 3, it can not only effectively support the formwork, but also realize the rigid connection between the cantilever support member 5 and the wall formwork support unit 3, and transfer the horizontal force generated during the pouring of the floor slab concrete at this position to the wall formwork support unit 3 and then to the base surface through the wall formwork support unit 3;

[0067] The backing member assembly 42 includes a horizontal backing member 421 and a vertical backing member 422 respectively connected to the corresponding vertical telescopic members 41; sliders 423 are respectively arranged on the horizontal backing member 421 and the vertical backing member 422; the sliders 423 slide along the long direction of the horizontal backing member 421 or the vertical backing member 422; one end of the cantilever support member 5 is detachably connected to the outermost horizontal backing member 421 or vertical backing member 422 in the early removal formwork support unit 4 and is perpendicular to each other.

[0068] The backing member assembly 42 connects all the vertical telescopic members 41 to form an integral structure and can effectively realize the support and fixation of the formwork; during use, there is no need to additionally add a horizontal connecting rod to connect the vertical telescopic members 41, so that the entire early removal formwork support system becomes a support system with good stability. Since there is no need to set a horizontal connecting rod in the middle and lower parts of the vertical telescopic members 41, it enables construction personnel and construction equipment to pass under the formwork during the construction process, greatly increasing the construction convenience;

[0069] Specifically, when the floor slab is a cast-in-place slab, the formwork can be a plastic formwork, a wooden formwork, a steel formwork or a composite slab;

[0070] When the plastic formwork, wooden formwork or steel formwork is used as the formwork, the formwork is installed above the slider 423 and fixed by screws or nails;

[0071] When the floor slab is a composite floor slab, the composite slab is installed on the slider 423, and a support formwork will be installed in the cast-in-place slab belt pouring area formed between adjacent two groups of composite slabs. The support formwork is installed on the horizontal backing member 421 or the vertical backing member 422 and its top surface is in the same plane as the bottom surface of the composite slab;

[0072] With the above settings, the utility model has a wide range of applications; during use, according to the actual needs, the construction workers are informed, and the corresponding installation method can be selected according to the different floor slabs.

[0073] In some possible embodiments, to facilitate the slider 423 to effectively support the formwork according to the installation requirements of the formwork; as Figure 6 、 Figure 7 、 Figure 9 、 Figure 10 shown, the slider 423 has a U-shaped structure with the opening facing downwards; it includes a support plate arranged above the transverse back rib 421 or the longitudinal back rib 422, vertical plates respectively connected to both ends of the support plate and arranged in parallel, and a convex platform 4231 arranged on the side where two groups of vertical plates are close to each other and inserted and matched with the transverse back rib 421 or the longitudinal back rib 422;

[0074] On the transverse back rib 421 or the longitudinal back rib 422 and along its length direction, there are multiple groups of jacks 42121 for cooperating with the convex platform 4231.

[0075] Specifically, as Figure 10 shown, there are multiple groups of sliders 423, which have a U-shaped structure and are sleeved on the outside of the transverse back rib 421 or the longitudinal back rib 422; after the slider 423 slides to the designated position, the convex platform 4231 arranged on the vertical plate cooperates with the jack 42121 to realize the fixed connection between the slider 423 and the transverse back rib 421 or the longitudinal back rib 422;

[0076] The slider 423 is made of plastic material; the formwork can be fixed to the slider 423 with iron nails or screws, and then the formwork is connected to the early removal formwork support unit to form a whole.

[0077] In some possible embodiments, to effectively realize the early removal of the formwork through the cooperation of the vertical telescopic member 41 and the back rib assembly 42, and to enable it to still effectively support the floor slab after the early removal of the formwork; as Figure 5 shown, the vertical telescopic member 41 includes a support disc 411 connected to the end of the back rib assembly 42, an adjustment screw 412 sleeved inside the support disc 411, a support rod 413 sleeved outside the adjustment screw 412 and located below the support disc 411, and a limiting member 414 for restricting the relative vertical movement between the support disc 411 and the adjustment screw 412, and between the adjustment screw 412 and the support rod 413;

[0078] The support disc 411 is provided with a through hole for the end of the adjustment screw 412 far from the support rod 413 to pass through; the through hole is coaxially arranged with the support disc 411; the limiting member 414 includes two groups of adjustment nuts sleeved outside the adjustment screw 412 and threadedly engaged with the adjustment screw 412.

[0079] Specifically, on the same support disc 411, the horizontal back ribs 421 and the vertical back ribs 422 will form an installation cavity on the side close to each other, and the end of the adjusting screw 412 away from the support rod 413 will extend into the installation cavity;

[0080] The support block 415 is located in the installation cavity and is connected to the bottom of the adjusting screw 412. When supporting the formwork, the top surface of the support block 415 is on the same plane as the top surface of the formwork, closing the installation cavity to prevent the slurry during concrete pouring from entering the installation cavity and flowing vertically to contaminate the adjusting screw 412, resulting in the inability to turn the adjusting nut and the adjusting screw 412; at the same time, the setting of the support block 415 will increase the supporting surface between the top end of the adjusting screw 412 and the poured concrete;

[0081] When supporting the formwork, first adjust the vertical position of the adjusting screw 412, and limit the downward movement of the adjusting screw 412 along the vertical direction through the contact between the adjusting nut away from the support disc 411 and the support rod 413; then effectively fix and support the formwork through the back rib assembly 42. At this time, control the adjusting nut on the side close to the support disc 411 to be in abutting cooperation with the bottom of the support disc 411 to limit the downward movement of the support disc 411;

[0082] When the strength of the concrete poured on the formwork reaches 50%, by turning the adjusting nut in abutting cooperation with the support disc 411, the adjusting nut moves along the axial direction of the adjusting screw 412 towards the side close to the support rod 413, so that the support disc 411 moves downward. The downward movement of the support disc 411 drives the back rib assembly 42 and the formwork on the back rib assembly 42 to move downward, so as to achieve separation from the concrete; early removal is realized; during the entire formwork removal process, the adjusting screw 412 will be limited by the adjusting nut in abutting cooperation with the support rod 413 and will not move downward, so that the support block 415 will always be in contact with the concrete; the support for the poured floor slab is realized;

[0083] Only when the concrete strength reaches 100%, by controlling the adjusting nut in abutting cooperation with the support rod 413 to move towards the side close to the support block 415, the adjusting screw 412 moves downward, driving the support block 415 to move downward, so as to realize the removal of the support rod 413, the adjusting screw 412, and the support block 415.

[0084] In some possible implementation manners, in order to effectively realize the connection and fixation between the back rib assembly 42 and the support disc 411; make the back rib assembly 42 and the vertical telescopic member form a stable whole;

[0085] Such as Figure 8As shown in the figure, a plurality of sets of mounting holes 4111 are provided on the support disc 411. The distances from the axes of the plurality of sets of mounting holes 4111 to the center of the support disc 411 are equal and are arranged at equal intervals; the bottom of the horizontal back beam 421 and the vertical back beam 422 is provided with a frustum 42111 that is fitted and mounted with the mounting hole 4111;

[0086] There are four sets of mounting holes 4111 on the same support disc 411. Two sets are used for the installation of the ends of the two horizontal back beams 421, and two sets are used for the installation of the two vertical back beams 422;

[0087] Furthermore, the mounting hole 4111 is a tapered hole, and its large end is arranged on the side away from the support rod 413; the cooperation between the tapered hole and the frustum 42111 can achieve the quick positioning and connection of the horizontal back beam 421 or the vertical back beam and the support disc 411;

[0088] In some possible implementation manners, a connecting rod 43 is provided between the adjacent horizontal back beam 421 and the vertical back beam 422 that are connected to the same support disc 411;

[0089] Specifically, the connecting rod 43 is in an L shape or a U shape; as Figure 11 shown in the figure, when it is in an L shape, U-shaped clamping members 431 with openings facing downwards are provided at both ends of the connecting rod 43, and the U-shaped clamping members 431 are clamped and matched with the back beam assembly 42; the connecting rod 43 is located in the installation cavity; the connecting rod 43 is mainly used for connecting the adjacent horizontal back beam 421 and the vertical back beam on the same support disc 411 at the edge position; to reinforce its connection.

[0090] Furthermore, as Figure 10 shown in the figure, the horizontal back beam 421 and the vertical back beam 422 have the same structure, including two connecting pipes 4211 respectively connected to two adjacent vertical telescopic members 41, and a back beam body 4212 provided between the two connecting pipes 4211 and connected to the two connecting blocks; the large end of the frustum 42111 is connected to the bottom of the connecting pipe 4211, and the jacking holes 42121 are provided on both sides of the back beam body 4212 along its long direction.

[0091] The large end of the frustum 42111 is installed at the bottom of the connecting pipe 4211, and its size is adapted to the tapered hole; both ends of the back beam body 4212 are respectively connected to the two connecting pipes 4211. During use, back beam bodies 4212 with different lengths can be used to connect with the connecting pipes 4211 according to the use requirements;

[0092] Specifically, the back rib body 4212 is a square tube; the jacks 42121 are arranged on two side surfaces of the back rib body 4212 along its length direction, and the slider 423 is connected and fixed by the cooperation of the boss 4231 and the jack 42121; the slider 423 can slide along the length direction of the back rib body 4212 and cooperate with different jacks 42121 to be fixed, so as to adjust the gap between two adjacent groups of sliders 423; the number of sliders 423 can be set according to the use requirements.

[0093] In some possible embodiments, the connecting pipe 4211 is sleeved outside the back rib body 4212 and is telescopically matched with the back rib body 4212 along the length direction of the back rib body 4212; the two groups of connecting pipes 4211 and the back rib body 4212 are coaxially arranged;

[0094] The back rib body 4212 and the connecting pipe 4211 are set to be telescopically matched, so that when the lengths of the horizontal back rib 421 and the vertical back rib 422 are within a certain range, without replacing the back rib body 4212 with different lengths, the positions of the connecting pipe 4211 and the back rib body 4212 are directly sleeved, and then the two are fixed, so that the construction is more efficient and convenient, greatly improving the construction efficiency and reducing the construction cost.

[0095] In some possible embodiments, for the effective support of the formwork, as Figure 19 shown, the cantilever support 5 includes a fixed pipe 51 connected to the back rib assembly 42, a telescopic pipe 52 sleeved with the fixed pipe 51 and telescopic along the length direction of the fixed pipe 51, and a locking member 53 for fixing the telescopic pipe 52 and the fixed pipe 51;

[0096] The locking member 53 includes a locking waist-shaped hole arranged along the length direction of the fixed pipe 51, a through hole arranged on the telescopic pipe 52 and corresponding to the locking waist-shaped hole, and a locking bolt 531.

[0097] A U-shaped clamp is arranged on the fixed pipe 51, and is sleeved outside the horizontal back rib 421 or the vertical back rib 422 through the U-shaped clamp, and the fixed pipe 51 is fixed to the horizontal back rib 421 or the vertical back rib 422 by bolts; one end of the telescopic pipe 52 is sleeved with the fixed pipe 51 and is telescopically matched with the fixed pipe 51 along its long axis direction; when it is arranged between the beam formwork support unit 1 and the early demolition formwork support unit 4, the other end thereof can be in contact with the outside of the beam formwork or in a small clearance fit; when it is arranged between the wall formwork support unit 3 and the early demolition formwork support unit 4, the other end thereof will be connected to the wall formwork support unit 3; thus realizing the rigid connection between the wall formwork support unit 3 and the early demolition formwork support unit 4, and realizing the transmission of the horizontal force generated during the formwork pouring to the wall formwork support unit 3 and then to the base surface, and finally reaching the ground;

[0098] The locking waist-shaped holes are symmetrically arranged on two sides of the fixed pipe 51 along its longitudinal direction, and both ends of the through hole communicate with two groups of locking waist-shaped holes respectively; when fixing the fixed pipe 51 and the telescopic pipe 52, one end of the locking bolt 531 sequentially passes through the locking waist-shaped hole, the through hole, and the locking waist-shaped hole, and then nuts are screwed on both ends of the locking bolt 531 to realize the fixation of the fixed pipe 51 and the telescopic pipe 52.

[0099] In some possible embodiments, when the cantilever support member is located between the back rib assembly 42 and the wall formwork, the end of the telescopic pipe 52 away from the fixed pipe 51 is connected to the wall formwork support unit 3; since the cantilever support member is between the wall formwork support unit 3 and the early removal formwork support unit 4, the transmission of the acting force also needs to be realized;

[0100] As Figure 19 shown, the telescopic pipe 52 is sleeved inside the fixed pipe 51, and the locking member further includes a tooth groove 532 arranged on the outer side surface of the fixed pipe 51 and on the same side as the locking waist-shaped hole, and a tooth plate 533 that is used in cooperation with the tooth groove 532 and is sleeved outside the locking bolt 531; the tooth groove 532 is provided in multiple groups and arranged along the long axis direction of the locking waist-shaped hole, and the longitudinal direction of each group of tooth grooves 532 is perpendicular to the longitudinal direction of the fixed pipe 51;

[0101] By providing the tooth groove 532 on the outer side of the fixed pipe 51 and sleeving the tooth plate 533 that meshes with the tooth groove 532 outside the locking bolt 531, the cooperation between the tooth groove 532 and the tooth plate 533 can effectively prevent the telescopic pipe 52 and the fixed pipe 51 from sliding during the casting of the floor slab concrete; enabling the wall formwork support unit 3 and the early removal formwork support unit 4 to achieve rigid connection.

[0102] In some possible embodiments, as Figure 12 、 Figure 13 shown, the beam formwork support unit 1 includes multiple groups of beam bottom supports 11 arranged along the length direction of the beam formwork and with adjustable vertical height, and two horizontal tie rods 12 arranged along the length direction of the beam formwork and connected to the beam bottom supports 11.

[0103] The beam bottom supports 11 are arranged according to the length of the beam; the horizontal tie rods 12 are used to connect all the beam bottom supports 11 at the bottom of this group of beams to form an integral structure, and a channel is formed between adjacent two groups of beam bottom supports 11; the horizontal tie rods 12 are arranged at one end of the beam bottom supports 11 close to the beam formwork; in this way, it will not interfere with the normal passage of construction equipment in the lower area; specifically, the distance between the horizontal tie rod 12 and the top of the beam bottom support 11 is 300 - 400 mm;

[0104] In order to effectively support and fix the beam formwork and provide a good passage space under the beam; the beam support member 11 below the beam includes at least two groups of vertical rods 111 arranged in parallel and respectively connected to two groups of horizontal tie rods 12, a cross bar 112 for connecting adjacent two groups of vertical rods 111, a vertical adjustment support installed at the bottom of the vertical rod 111, a beam rod 113 below the beam for the vertical rod 111, the horizontal tie rod 12, and the vertical telescopic member 41 adjacent to the horizontal tie rod 12, and a beam bracket 114 installed at the top of the vertical rod 111 and used to support the bottom of the beam formwork;

[0105] The axes of all the vertical rods 111 in each group of beam support members 11 are in the same plane and perpendicular to the length direction of the horizontal tie rod 12; there are at least two cross bars 112 arranged between adjacent two groups of cross bars 112 in each group of beam support members 11 and arranged along the length direction of the vertical rod 111. Multiple groups of vertical rods 111 and cross bars 112 are integrally formed into a bracket structure. The horizontal tie rod 12 is connected to the vertical rod 111 through a fastener and is located outside the bracket structure;

[0106] The vertical adjustment support is a prior art such as a jack, which is used for adjusting the vertical height of the vertical rod 111, so that the beam support member 11 below the beam is suitable for buildings with different storey heights.

[0107] The beam bracket 114 includes a transverse rectangular tube arranged parallel to the cross bar 112 and installed at the top of the vertical rod 111, and end plates arranged at both ends of the transverse rectangular tube and cooperating with the transverse rectangular tube to form a U-shaped groove;

[0108] Specifically, the beam rod 113 below the beam includes two groups of diagonal connecting rods 1131 arranged in a cross shape and used to connect all the vertical rods 111 and the support rod 413 in the vertical telescopic member 41, and a horizontal connecting rod 1132 used to connect the vertical rod 111 and the support rod 413 in the vertical telescopic member 41;

[0109] The beam formwork support unit 1 and the slab support unit are connected into a whole through the horizontal connecting rod 1132 and the diagonal connecting rod 1131. The connection position of the diagonal connecting rod 1131 and the support rod 413 is below the adjusting screw rod 412, thereby effectively reducing the bending moment force of the vertical telescopic member 41;

[0110] In a frame structure building, the floor slab is usually divided into multiple blocks by columns and beams. At this time, the beam formwork support unit 1 includes an edge beam formwork support unit and an intermediate beam formwork support unit; specifically, as Figure 13 shown, the diagonal connecting rods 1131 arranged in a cross for the intermediate beam formwork support unit are used to lock the vertical telescopic members 41 on both sides of the beam formwork support unit 1, and the diagonal connecting rods 1131 arranged close to the inner side of the structure for the edge beam formwork support unit will also be connected to the base surface and used as a ground pulling rod to realize the transfer of the horizontal load generated during the construction of the structural layer to the lower floors.

[0111] In some possible embodiments, in order to effectively support and fix the wall formwork; the wall formwork support unit 3 includes an outer support 31, an inner support 32 that forms a shear wall cavity by being connected to each other through tension members, and a ground-pulling diagonal brace 34 for connecting the inner support 32 to the base surface; the shear wall cavity is respectively communicated with the column cavity formed by the column formwork support unit 2; two groups of wall formworks are arranged in the shear wall cavity, and a wall concrete pouring cavity is formed between the two;

[0112] The inner support 32 has the same structure as the outer support 31; it includes a transverse back brace 311 that is horizontally arranged along the vertical direction and is connected to the cantilever support member 5, multiple groups of vertical adjustable back braces 312 that are connected to the transverse back brace 311 and are vertically arranged and act on the base surface, and a connecting member 313 for connecting the transverse back brace 311 and the vertical adjustable back brace 312; wherein the transverse back brace 311 is arranged on the side of the vertical adjustable back brace 312 away from the shear wall cavity.

[0113] Further, one end of the ground-pulling diagonal brace 34 away from the vertical adjustable back brace 312 is hinged to the base surface, and a hinge seat is arranged on the base surface.

[0114] In some possible embodiments, in order to effectively connect the transverse back brace 311 and the vertical adjustable back brace 312; the connecting member 313 includes a U-shaped buckle arranged between the vertical adjustable back brace 312 and the transverse back brace 311 and connected to them respectively; U-shaped card slots 3130 are respectively arranged on one side of the U-shaped buckle close to the vertical adjustable back brace 312 and on one side close to the transverse back brace 311; the transverse back brace 311 is slidably matched with the U-shaped buckle along the length direction of the transverse back brace 311 and is fixedly connected through a pin shaft, and the transverse back brace 311 is slidably matched with the U-shaped buckle along the length direction of the vertical adjustable back brace 312 and is fixedly connected through a tapered card 314;

[0115] Specifically, the vertical adjustable back brace 312 and the transverse back brace 311 are processed from square tubes; circular holes 3121 are arranged on the vertical adjustable back brace 312 along its length direction, and the fixed connection between the vertical adjustable and the connecting member 313 and the hinge connection between the vertical adjustable back brace 312 and the ground-pulling diagonal brace 34 are realized through the cooperation of the circular holes 3121 and the pin shaft. An articulated support is arranged at one end of the ground-pulling diagonal brace 34 close to the vertical adjustable back brace 312, and the articulated support and the vertical adjustable back brace 312 are fixed through the cooperation of the circular holes 3121 and the pin shaft;

[0116] U-shaped grooves that are slidably matched with the length direction of the corresponding vertical adjustable back brace 312 or transverse back brace 311 are respectively arranged on one side of the U-shaped buckle close to the vertical adjustable back brace 312 and on one side close to the transverse back brace 311; after the U-shaped buckle moves to the specified position, the connection between the vertical adjustable back brace 312 and the U-shaped buckle is realized through the cooperation of the circular holes 3121 and the pin shaft; the connection between the U-shaped buckle and the transverse back brace 311 is realized through the tapered card 314;

[0117] Further, a waist-shaped hole 3111 is provided on the transverse back rib 311 along its longitudinal direction. On one side of the U-shaped buckle close to the transverse back rib 311, a first long hole 3131 is provided for cooperating with the waist-shaped hole 3111. After the transverse back rib 311 moves to the designated position, the small end of the tapered card 314 passes through the first long hole 3131 and the waist-shaped hole 3111 from top to bottom to fix the transverse back rib 311 and the U-shaped buckle.

[0118] In order to effectively fix the tension member and enable the outer mold and the inner mold to effectively cooperate to form a shear wall pouring cavity; each group of the transverse back ribs 311 includes two parallel and identically structured back rib bars 3110 and end heads 3112 for fixing the two ends of the back rib bars 3110; a gap for the tension member to pass through is formed between the two back rib bars 3110.

[0119] The tension member includes a set of screw rods, two sets of buckles sleeved outside the screw rods and screwed with the screw rods, and two sets of nuts sleeved outside the screw rods and screwed with the screw rods. The buckle includes two slots on one side close to the transverse back rib 311 for inserting into the back rib bars 3110, and a convex part is formed between the two slots for insertion into the gap.

[0120] In order to effectively connect two adjacent groups of transverse back ribs 311 on the same horizontal plane; a back rib connecting member 33 is provided between the two groups of transverse back ribs 311 on the same horizontal plane.

[0121] The back rib connecting member 33 is provided with a T-shaped chute 331 with an open small end and two clamping pieces 332 with one end extending into the T-shaped chute 331 and slidingly cooperating with the back rib connecting member 33; a clamping groove 333 for clamping the vertical adjustable back rib 312 is formed between the two clamping pieces 332; the two ends of the two groups of transverse back ribs 311 close to each other are located in the large end of the T-shaped chute 331 and slidingly cooperate with the T-shaped chute 331.

[0122] The two clamping pieces 332 can slide along the longitudinal direction of the T-shaped chute, and there is a gap between the end of the clamping piece 332 located in the large groove and the transverse back rib 311 without interference; connection holes are provided on the clamping pieces 332, and the axes of the two connection holes are on the same straight line and are arranged along the sliding direction thereof.

[0123] Further, to strengthen the connection between the transverse back rib 311 and the back rib connecting member 33, the back rib connecting member 33 and the end head 3112 are connected by bolts.

[0124] During installation, move the two groups of clamping pieces 332 so that the clamping pieces 332 are connected and fixed to the adjacent vertically adjustable back ribs 312 through the cooperation of bolts and connecting holes; multiple groups of oblong holes two 334 that are used in cooperation with the waist-shaped holes 3111 and are connected to the large ends of the T-shaped chutes 331 are provided on the back rib connectors 33. The long axis direction of the oblong holes two 334 is arranged along the sliding direction. The connection between the two is achieved through the cooperation of the small end of the tapered card 314 with the oblong holes two 334 and the waist-shaped holes 3111.

[0125] Furthermore, the column formwork support unit 2 is formed by the cooperation of the transverse back ribs 311 and the vertically adjustable back ribs 312 to form a column cavity communicating with the shear wall cavity formed by the wall formwork support unit 3; when connecting two groups of transverse back ribs 311 on the same side and at the same horizontal plane, the back rib connector 33 is used; when connecting the column formwork support unit 2 and the wall formwork support unit 3 at the corner joint and connecting the transverse back ribs 311 on the adjacent two sides of the column formwork, they are connected by an L-shaped connector; the L-shaped connector is also provided with a T-shaped chute 331. One end of two adjacent transverse back ribs 311 that are close to each other extends into the T-shaped chute 331, and its fixation to the transverse back ribs 311 is achieved through the cooperation of the provided oblong holes three and the waist-shaped holes 3111, as well as bolt connection.

[0126] The column formwork support unit, beam formwork support unit, and wall formwork support unit in the present utility model can also be processed using the prior art.

[0127] During use, after the concrete is poured and completed, first remove the shear wall formwork and column formwork, and then remove the slab formwork. Since the shear wall formwork and column formwork are removed first, the cantilever support member 5 will no longer be connected to the transverse back ribs 311. Subsequently, when removing the slab formwork, the cantilever support member will move downward as the transverse back ribs 421 and longitudinal back ribs 422 move downward vertically, realizing the removal of the slab formwork.

[0128] The present utility model is not limited to the foregoing specific embodiments. The present utility model extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A formwork support system applicable to the construction of concrete building structures, characterized in that, It includes multiple groups of beam formwork support units, multiple groups of column formwork support units, multiple groups of wall formwork support units, and early removal slab formwork support units; the beam formwork support units, column formwork support units, and wall formwork support units cooperate with each other to form an installation cavity for installing the early removal slab formwork support units, and the early removal slab formwork support units are respectively connected to the wall formwork support units and the beam formwork support units; The early removal slab formwork support unit includes multiple groups of vertically arranged vertical telescopic members with adjustable lengths, a back rib assembly for connecting adjacent two groups of vertical telescopic members and for supporting the formwork, and a cantilever support member installed on the back rib assembly and located in the gap formed between the back rib assembly and the beam formwork and / or wall formwork; The back rib assembly includes a horizontal back rib and a longitudinal back rib respectively connected to the corresponding vertical telescopic members; Sliders are respectively arranged on the horizontal back rib and the longitudinal back rib; the sliders slide along the length direction of the horizontal back rib or the longitudinal back rib; One end of the cantilever support member is detachably connected to the outermost horizontal back rib or longitudinal back rib in the early removal slab formwork support unit and is perpendicular to it.

2. The formwork support system applicable to the construction of concrete building structures according to claim 1, characterized in that, The slider has a U-shaped structure with the opening facing downwards; it includes a support plate arranged above the horizontal back rib or the longitudinal back rib, vertical plates respectively connected to both ends of the support plate and arranged in parallel, and a convex platform arranged on the side where the two vertical plates are close to each other and inserted and matched with the horizontal back rib or the longitudinal back rib; Multiple groups of jacks for cooperating with the convex platform are arranged on the horizontal back rib or the longitudinal back rib along its length direction.

3. A formwork support system applicable to the construction of concrete building structures according to claim 1, characterized in that, The vertical telescopic member includes a support disc connected to the end of the back rib assembly, an adjustment screw rod sleeved in the support disc, a support rod sleeved outside the adjustment screw rod and located below the support disc, and a limiting member for restricting the relative vertical movement between the support disc and the adjustment screw rod, and between the adjustment screw rod and the support rod; A through hole is arranged on the support disc for the end of the adjustment screw rod far from the support rod to pass through; the limiting member includes two groups of adjustment nuts sleeved on the outside of the adjustment screw rod and threadedly engaged with the adjustment screw rod.

4. A formwork support system applicable to the construction of concrete building structures according to claim 3, characterized in that, Multiple groups of installation holes are arranged on the support disc, and the distances from the centers of the multiple groups of installation holes to the center of the support disc are equal and arranged at equal intervals; the bottoms of the horizontal back rib and the longitudinal back rib are provided with round platforms for cooperating with the installation holes for installation; The horizontal back rib and the longitudinal back rib on the same support disc cooperate with each other to form a chamber, and a support block is arranged in the chamber on the support disc, and the top surface of the support block is on the same plane as the top surface of the formwork; the end of the adjustment screw rod far from the support rod passes through the support disc and is connected to the support block.

5. A formwork support system applicable to the construction of concrete building structures according to claim 1, characterized in that, The cantilever support member includes a fixed tube connected to the back rib assembly, a telescopic tube sleeved with the fixed tube and telescoping along the length direction of the fixed tube, and a locking member for fixing the telescopic tube and the fixed tube; the locking member includes a locking waist-shaped hole arranged along the length direction of the fixed tube, a through hole arranged on the telescopic tube and corresponding to the locking waist-shaped hole, and a locking bolt.

6. The formwork support system applicable to the construction of concrete building structures according to claim 5, characterized in that, When the cantilever support member is located between the back rib assembly and the wall formwork, the end of the telescopic tube far from the fixed tube is connected to the wall formwork support unit; The locking member further includes a tooth groove provided on the outer side surface of the fixed pipe and on the same side as the locking waist-shaped hole, and a tooth plate that is used in cooperation with the tooth groove and is sleeved outside the locking bolt; the tooth grooves are multiple groups and are arranged along the long axis direction of the locking waist-shaped hole, and the long direction of each group of tooth grooves is perpendicular to the long direction of the fixed pipe.

7. A formwork support system applicable to the construction of concrete building structures according to claim 3, characterized in that, The beam formwork support unit includes multiple groups of beam bottom supports arranged along the length direction of the beam formwork and vertically height-adjustable, and two horizontal tie rods arranged along the length direction of the beam formwork and connected to the beam bottom supports.

8. A formwork support system applicable to the construction of concrete building structures according to claim 7, characterized in that, The beam bottom support includes at least two groups of vertical rods arranged in parallel and respectively connected to the two horizontal tie rods, a cross bar for connecting adjacent two groups of vertical rods, a vertical adjustment support installed at the bottom of the vertical rod, a beam bottom rod for the vertical rod, the horizontal tie rod, and the vertical telescopic member adjacent to the horizontal tie rod, and a beam bracket installed at the top of the vertical rod and used for supporting the bottom of the beam formwork; the beam bottom rod includes a horizontal connecting rod for connecting the vertical rod and the support rod in the vertical telescopic member, and two diagonal connecting rods arranged in a cross shape and used for connecting all the vertical rods and the support rods in the vertical telescopic member; the connection point of the diagonal connecting rod and the support rod is provided at one end of the support rod close to the adjusting screw.

9. A formwork support system applicable to the construction of concrete building structures according to claim 1, characterized in that, The wall formwork support unit includes an outer support, an inner support having the same structure as the outer support and connected to each other through tension members to form a shear wall cavity, and a ground-pulling diagonal brace for connecting the inner support and the base surface. The inner support includes a horizontal back brace arranged horizontally in the vertical direction and connected to the cantilever support member, multiple groups of vertical adjustable back braces connected to the horizontal back brace and arranged vertically and acting on the base surface, and a connecting member for connecting the horizontal back brace and the vertical adjustable back brace.

10. A formwork support system applicable to the construction of concrete building structures according to claim 9, characterized in that, The connecting member includes a U-shaped buckle provided between the vertical adjustable back brace and the horizontal back brace and respectively connected to them; U-shaped card slots are respectively provided on one side of the U-shaped buckle close to the vertical adjustable back brace and on one side close to the horizontal back brace; the horizontal back brace and the U-shaped buckle are slidably matched along the long direction of the horizontal back brace and are fixedly connected by a pin shaft, and the horizontal back brace and the U-shaped buckle are slidably matched along the long direction of the vertical adjustable back brace and are fixedly connected by a tapered card. Each group of the horizontal back braces includes two parallel and identically structured back brace bars, and a head for fixing the two ends of the back brace bars; a gap for the tension member to pass through is formed between the two back brace bars. A back brace connecting member is provided between two groups of horizontal back braces on the same horizontal plane. The back brace connecting member is provided with a T-shaped chute with a small-end opening, and two clamping pieces with one end extending into the T-shaped chute and slidably matched with the back brace connecting member; a clamping groove for clamping the vertical adjustable back brace is formed between the two clamping pieces; one end of the two groups of horizontal back braces close to each other is located in the T-shaped chute and is slidably matched with the T-shaped chute.

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