Base turnover formwork supporting structure between cast-in-place stair platforms

Abstract

The utility model discloses a base turnover formwork supporting structure between cast-in-place stair platforms, which comprises a supporting base and a formwork supporting steel pipe frame, the formwork supporting steel pipe frame comprises a vertical rod, the supporting base comprises a supporting column assembly and a bearing table assembly, each supporting column assembly comprises two supporting leg rods and a transverse foot rod, and the supporting leg rods are connected with the bearing table assembly. The bearing table assembly comprises a sleeve cap, a table plate and a center limiting part, the sleeve cap is fixedly connected to the bottom face of the table plate, the sleeve cap is aligned with the center of the supporting leg rod, the top of the supporting leg rod is inserted into the sleeve cap and detachably connected with the sleeve cap in a sleeved mode, and the bottom of the vertical rod is connected to the outer portion of the center limiting part in a sleeved mode and falls on the top face of the table plate. The turnover supporting base is arranged at the bottom of the formwork supporting steel pipe frame, so that the vertical rod can stably fall to the ground, it is guaranteed that a steel pipe supporting system at the position of a stair plate is erected more stably, safety is guaranteed, and the steel pipe supporting system can be recycled, is not prone to breakage and is high in combination degree with concrete; and the thickness of the protective layer of the stair plate and the concrete appearance quality after the stair plate is formed are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cast-in-place concrete formwork field, especially a formwork support structure between cast-in-place stair platform. BACKGROUND

[0002] In the cast-in-place concrete pouring of double-run or more cast-in-place stair, the stair inner formwork support system, that is, the bottom formwork support system of the upper rest platform at the turning point, has always met the demand of safe and stable support to realize load transfer. The emergence of this demand is due to the fact that the vertical rods of the upper rest platform formwork support system need to be erected on the lower horizontal components. At this time, there are two options for the lower horizontal components. One is to erect the vertical rods on the platform at the bottom layer that has been completed, that is, the load is directly transferred from top to bottom to the bottom layer. The other is to erect the vertical rods on the formwork of the rest platform at the lower layer that has not been constructed, that is, the load is transferred layer by layer downward through the rest platform at the lower layer that has not been constructed. When the first method is adopted, holes need to be opened on the bottom formwork panel of the rest platform at the lower layer that has not been constructed, so that the vertical rods penetrate from bottom to top. This method wastes a large number of unnecessary procedures for the platform stair support system with reserved holes. Before concrete pouring, the holes need to be plugged, which may cause leakage during concrete pouring and cannot meet the safety requirements. After concrete pouring, the holes caused by the vertical rods need to be plugged later, which is complicated and wastes materials. When the second method is adopted, a support for the vertical rods to fall is needed between the vertical rods and the rest platform that has not been constructed. This support is generally a plane support or a concrete cushion.

[0003] The plane support is a soil-shaped frame made of steel bars only. The height of the soil-shaped frame is equal to the height of the platform steel bars. The vertical rods are directly inserted into the top of the vertical rods of the soil-shaped frame, and the horizontal rods of the soil-shaped frame maintain the falling point of the vertical rods. The installation of the vertical rods cannot be guaranteed to be firm and safe. After the concrete pouring is completed, the vertical rods of the plane support protrude on the surface of the concrete. After the concrete is solidified, the construction personnel are likely to trip when walking. The invention patent with the publication number CN114753508B discloses a segmented stair plate plane support device and operation method. This scheme is an improvement on the plane support. An installation mechanism is added to the vertical rods of the original plane support to ensure the stability of the vertical rods. The installation mechanism firmly clamps the vertical rods and the plane support through mechanical principles. However, no matter how firmly the vertical rods and the plane support are clamped, the vertical rods and the rest platform at the lower layer that has not been constructed are still connected only by the steel bars of the plane support. The complex setting of the upper installation mechanism increases the load on the plane support and increases the construction budget, which requires higher operation requirements for workers.

[0004] The concrete cushion block is only made of concrete, the height of the cushion block is equal to the height of the platform steel bar, and the vertical rod is directly arranged on the concrete cushion block, the utility model discloses a novel stair rest platform steel pipe fixing device, and the scheme is an improvement on the concrete cushion block, a vertical rod detachable support is made through a mountain-shaped clamp, a screw rod and a nut, but the lower part of the device is only fixed through the screw rod by being inserted into the blind hole opened on the concrete cushion block, so that the stress of the whole device is unstable, the utility model discloses a pouring formwork of a multi-run stair support frame body concrete base, and after pouring, a concrete cushion block is formed, and a conical table is formed on the top for sleeving the vertical rod, in the above scheme, the concrete cushion block still has the problems that the concrete cushion block needs to be poured on site, is easy to be broken under stress and has low combination with concrete, and the safety of the firmness of the vertical rod installation cannot be guaranteed. Utility model content

[0005] The utility model discloses a cast-in-place stair platform formwork base turnover support frame structure, and aims to solve the technical problems that the hole of the bottom formwork panel penetrated by the vertical rod of the bottom plate support system of the bottom plate support system of the existing turning part upper layer rest platform needs to be blocked before concrete pouring, and concrete pouring is easy to cause leakage, and safety cannot be satisfied, and the technical problems that the airplane support or concrete cushion block for the vertical rod landing between the existing vertical rod and the non-constructed rest platform exist.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A cast-in-place stair platform bottom base turnover formwork support structure is supported between a lower platform formwork system and an upper platform formwork system, comprising a steel support base and a formwork steel pipe frame, the formwork steel pipe frame comprises a vertical rod,

[0008] The support base is arranged in one-to-one correspondence with the vertical rod, comprising two support column assemblies and a supporting table assembly, the two support column assemblies are arranged horizontally and in parallel, each support column assembly is located in the same plane, comprising two leg rods and a horizontal foot rod, the leg rods are arranged horizontally in columns, the two ends of the foot rod are fixedly connected between the bottom ends of the two leg rods and extend outward, the bottom surfaces of the two foot rods of each support base are located in the same plane,

[0009] The supporting table assembly comprises a sleeve cap, a table plate and a central limiting portion, the top surface of the sleeve cap is flush with and fixedly connected at the bottom surface of the table plate at the four corners, the sleeve cap is arranged in one-to-one correspondence and central alignment with the leg rods, the bottom of the sleeve cap is provided with an opening, the top of the leg rod is inserted into the opening and detachably sleeved with the corresponding sleeve cap,

[0010] The bottom of the vertical rod is sleeved outside the central limiting portion and placed on the top surface of the table plate.

[0011] The base turnable formwork support structure further comprises a formwork panel of the lower platform formwork system, the bottom surface of the foot rod is placed on the top surface of the formwork panel,

[0012] The base turnable formwork support structure further comprises a lower platform steel bar of the lower platform structure, the lower platform steel bar comprises a bottom steel bar layer and a top steel bar layer, the bottom steel bar layer comprises a bottom longitudinal steel bar and a bottom transverse steel bar, the bottom transverse steel bar is located on the lower side of the bottom longitudinal steel bar, the top steel bar layer comprises a top longitudinal steel bar and a top transverse steel bar, the top transverse steel bar is located on the lower side of the top longitudinal steel bar.

[0013] The bottom longitudinal steel bar and the top longitudinal steel bar longitudinally pass through the gap between the transversely adjacent support leg rods, the bottom steel bar layer is raised by a protection layer cushion block from the formwork panel, and the top surface of the support leg rod is not higher than the top surface of the bottom transverse steel bar.

[0014] The base turnable formwork support structure further comprises a reinforcing frame vertical steel bar arranged around the support base, the reinforcing frame vertical steel bar is arranged in two layers and corresponds to the corresponding steel bar layer, the reinforcing frame vertical steel bar is fixedly connected with the corresponding steel bar layer and the adjacent support leg rod by binding, and the reinforcing frame vertical steel bar is a parallel reinforcing frame vertical steel bar and / or a cross reinforcing frame vertical steel bar.

[0015] The reinforcing frame vertical steel bar is a parallel reinforcing frame vertical steel bar, the parallel reinforcing frame vertical steel bar is longitudinally arranged and arranged on the outer side of the adjacent support leg rod, four parallel reinforcing frame vertical steel bars are arranged at each support base, including two parallel bottom steel bars and two parallel top steel bars arranged on the transversely opposite sides of the support base, the parallel bottom steel bar is located in the same horizontal plane as the bottom longitudinal steel bar, the parallel bottom steel bar is fixedly connected with the bottom transverse steel bar and the two support leg rods on the same side by binding, the parallel top steel bar is located in the same horizontal plane as the top longitudinal steel bar, and the parallel top steel bar is fixedly connected with the top transverse steel bar and the two support leg rods on the same side by binding.

[0016] The reinforcing frame vertical steel bar is a cross reinforcing frame vertical steel bar, the cross reinforcing frame vertical steel bar crosses through the gap between the adjacent support leg rods, two reinforcing frame vertical steel bars are arranged at each support base and correspond to the corresponding steel bar layer, including a bifurcated bottom steel bar and a bifurcated top steel bar, the bifurcated bottom steel bar is fixedly connected with the bottom longitudinal steel bar and the two support leg rods located at the opposite diagonal lines by binding, and the bifurcated top steel bar is fixedly connected with the top longitudinal steel bar and the two support leg rods located at the opposite diagonal lines by binding.

[0017] The bottom end of the vertical rod is connected with a connecting sleeve, the inner diameter of the connecting sleeve is adapted to and fixedly connected with the outer diameter of the vertical rod, and the inner diameter of the connecting sleeve is greater than the outer diameter of the center limiting part.

[0018] The platform is a rectangular plate, the center limiting part is a steel bar or a steel pipe fixedly connected at the bottom of the center of the platform and vertically arranged, when the center limiting part is a steel bar, the height of the steel bar is greater than the height of the center limiting part, and when the center limiting part is a steel pipe, the height of the steel pipe is less than the height of the center limiting part.

[0019] The connecting sleeve is provided with a first pin hole crossing through, and the center limiting part is a steel pipe, and the steel pipe is also provided with a second pin hole crossing through corresponding to the position of the steel pipe, and the first pin hole is aligned with the second pin hole and is connected through a plug pin.

[0020] The sleeve cap is a vertical sleeve, and the bottom surface of the sleeve cap is located above the top rib mesh layer and is not lower than the top surface of the platform pouring concrete.

[0021] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0022] The utility model discloses a turnover support base is arranged at the bottom of the formwork steel pipe support, and is placed on the formwork panel of the lower layer platform formwork system, realizes that the vertical rod is stable and falls to the ground.Support base is composed of support column assembly and bearing table assembly, and the both detachable connection, support column assembly stands on the formwork panel, and bearing table assembly supports the upper vertical rod and sets up the center limiting part and guarantees the stability of vertical rod.Meanwhile, the support column assembly is also fixed by being bound with the platform reinforcement through the setting of the reinforcing frame vertical rib, further stabilizes the support base, prevents the safety accident caused by the shaking of the scaffold due to the concrete vibration during pouring, and after the platform concrete pouring maintenance is completed, the bearing table assembly becomes the protective sleeve of the top of the support leg rod, prevents the reinforcement sharp head from tripping the worker, then the support leg rod above the surface is cut off along the concrete surface when removing, finally removes the bearing table assembly, guarantees the later structure safety, prevents the leakage and the like.

[0023] The utility model discloses the setting of traditional airplane props and cushion blocks is given up, and all components adopt traditional welding connection, guarantees that the steel pipe support system of stair board place sets up more stably, and the safety is guaranteed, and the detachable connection between support column assembly and bearing table assembly is guaranteed, the bearing table assembly can be recycled, and the component is the finished product of prefabricated reinforcement and steel plate, is not easy to break, and the combination degree with concrete is higher, and the process is simple, and the actual operation can be carried out on the scene, guarantees that the concrete does not need to be handled after construction is completed, avoids the leakage risk of the later reserved hole plugging and the like, guarantees the stair board protection layer thickness and the concrete appearance quality after the stair board is formed after the formwork support system is removed. ACCURACY OF DRAWINGS

[0024] The utility model will be further explained in detail in connection with the drawings.

[0025] Figure 1 It is the structural schematic diagram of the utility model embodiment one.

[0026] Figure 2 It is Figure 1 The partial close -up drawing of support base position in

[0027] Figure 3 It is Figure 2 The partial close -up drawing of support base position in

[0028] Figure 4is another angle structure schematic view of Figure 3 is another angle structure schematic view of

[0029] Figure 5 is another angle structure schematic view of

[0030] Figure 6 is another angle structure schematic view of Figure 5 is another angle structure schematic view of

[0031] Figure 7 is another angle structure schematic view of Figure 6 is another angle structure schematic view of

[0032] Figure 8 is another angle structure schematic view of

[0033] Figure 9 is another angle structure schematic view of Figure 8 is another angle structure schematic view of

[0034] Figure 10 is another angle structure schematic view of

[0035] Figure 11 is another angle structure schematic view of

[0036] Figure 12 is another angle structure schematic view of

[0037] Reference signs: 1 - lower platform formwork system, 11 - formwork panel, 2 - upper platform formwork system, 3 - support base, 31 - support column assembly, 311 - support leg rod, 312 - foot rod, 32 - support table assembly, 321 - sleeve cap, 322 - table plate, 323 - center limiting part, 324 - second pin hole, 4 - formwork steel pipe frame, 41 - vertical rod, 42 - connecting sleeve, 43 - first pin hole, 5 - lower platform steel bar, 51 - bottom steel mesh layer, 511 - bottom longitudinal steel bar, 512 - bottom transverse steel bar, 52 - top steel mesh layer, 521 - top longitudinal steel bar, 522 - top transverse steel bar, 6 - protective layer cushion block, 7 - reinforcing frame vertical steel bar, 71 - parallel frame vertical steel bar, 711 - parallel bottom steel bar, 712 - parallel top steel bar, 72 - cross frame vertical steel bar, 721 - bifurcated bottom steel bar, 722 - bifurcated top steel bar, 8 - platform pouring concrete, 9 - wall body. DETAILED DESCRIPTION

[0038] Embodiment one refers to Figures 1-4, 8-11, there are three layers of stair platforms vertically opposite each other, and the other side of the platform is a wall 9, wherein the first layer of platform has been poured and consolidated, which can provide support for the second layer of platform, but the second and third layers of platform have not been poured, so the support of the third layer of platform can only fall on the second layer of platform. Therefore, the base between the cast-in-place stair platforms can be used to support the formwork support structure, which is supported between the lower platform formwork system 1 and the upper platform formwork system 2, including a steel support base 3 and a formwork steel pipe frame 4, which includes a vertical rod 41.

[0039] Referring to Figures 8-10 , the support base 3 and the vertical rod 41 are arranged one by one, including two support column assemblies 31 and a support table assembly 32, the two support column assemblies 31 are arranged horizontally and parallel to each other, and each support column assembly 31 is located in the same plane, including two leg rods 311 and a horizontal foot rod 312, the leg rods 311 are arranged horizontally in a row, and the foot rod 312 is fixedly connected between the bottom ends of the two leg rods 311 and extends outward, and the bottom surfaces of the two foot rods 312 of each support base 3 are located in the same plane.

[0040] The support table assembly 32 includes a cap 321, a table plate 322, and a central limiting portion 323, the top surface of the cap 321 is flush with and fixedly connected to the bottom surface of the table plate 322 at the four corners, the cap 321 is arranged one by one and centrally aligned with the leg rods 311, the bottom of the cap 321 is provided with an opening, and the top of the leg rod 311 is inserted into the opening and detachably sleeved with the corresponding cap 321.

[0041] The bottom of the vertical rod 41 is sleeved outside the central limiting portion 323 and falls on the top surface of the table plate 322.

[0042] Referring to Figures 3-4 , the base of the formwork support structure also includes a formwork panel 11 of the lower platform formwork system 1, and the bottom surfaces of the foot rods 312 all fall on the top surface of the formwork panel 11.

[0043] Referring to Figure 4 , the base of the formwork support structure also includes lower platform steel bars 5 of the lower platform structure, which include a bottom mesh layer 51 and a top mesh layer 52, the bottom mesh layer 51 includes a bottom longitudinal bar 511 and a bottom transverse bar 512, the bottom transverse bar 512 is located below the bottom longitudinal bar 511, and the top mesh layer 52 includes a top longitudinal bar 521 and a top transverse bar 522, the top transverse bar 522 is located below the top transverse bar 522.

[0044] Referring to Figures 3-4 , the bottom longitudinal bar 511 and the top longitudinal bar 521 both pass longitudinally through the gap between the horizontally adjacent leg rods 311, the bottom mesh layer 51 and the formwork panel 11 are raised by a protective layer cushion 6, and the top surface of the leg rod 311 is not higher than the top surface of the bottom transverse bar 512.

[0045] Referring to Figures 2-4 As shown, the bottom end of the vertical rod 41 is extended with a connecting sleeve 42, the inner diameter of the connecting sleeve 42 is adapted to the outer diameter of the vertical rod 41 and fixedly connected, and the inner diameter of the connecting sleeve 42 is larger than the outer diameter of the center limiting part 323.

[0046] The platform 322 is a rectangular plate, and the center limiting part 323 is a vertical steel bar or steel pipe fixedly connected at the center of the platform 322. When the center limiting part 323 is a steel bar, the height of the steel bar is greater than the height of the center limiting part 323. When the center limiting part 323 is a steel pipe, the height of the steel pipe is less than the height of the center limiting part 323.

[0047] Referring to Figure 3 , 10 As shown, the connecting sleeve 42 is provided with a first pin hole 43 transversely passing through, and when the center limiting part 323 is a steel pipe, a second pin hole 324 transversely passing through is also provided at the position corresponding to the steel pipe, and the first pin hole 43 and the second pin hole 324 are aligned and connected by a pin.

[0048] Referring to Figures 11-12 As shown, the sleeve cap 321 is a vertical sleeve, and the bottom surface of the sleeve cap 321 is located above the top reinforcement mesh layer 52 and is not lower than the top surface of the platform pouring concrete 8.

[0049] Referring to Figures 2-4 As shown, the base reusable formwork support structure further comprises a reinforcing frame vertical reinforcement 7 arranged around the base 3. The reinforcing frame vertical reinforcement 7 is arranged in two layers and corresponds to the corresponding reinforcement mesh layer. The reinforcing frame vertical reinforcement 7 is fixedly connected to the corresponding reinforcement mesh layer and the adjacent support leg 311 by binding. The reinforcing frame vertical reinforcement 7 is parallel frame vertical reinforcement 71 and / or cross frame vertical reinforcement 72.

[0050] The reinforcing frame vertical reinforcement 7 is parallel frame vertical reinforcement 71, which is longitudinally arranged and arranged outside the adjacent support leg 311. Each base 3 is provided with four parallel frame vertical reinforcements 71, including two parallel bottom reinforcements 711 and two parallel top reinforcements 712 arranged on the transverse two sides of the base 3. The parallel bottom reinforcement 711 is located in the same horizontal plane as the bottom longitudinal reinforcement 511. The parallel bottom reinforcement 711 is fixedly connected to the bottom transverse reinforcement 512 and the two support legs 311 on the same side by binding. The parallel top reinforcement 712 is located in the same horizontal plane as the top longitudinal reinforcement 521. The parallel top reinforcement 712 is fixedly connected to the top transverse reinforcement 522 and the two support legs 311 on the same side by binding.

[0051] In this embodiment, four support bases 3 are arranged on the lower platform template system, and the reinforcing frame vertical bars 7 are arranged as follows: parallel frame vertical bars 71 are arranged around each support base 3. The support leg bars 311 are steel bars with a diameter of 18 mm, the foot bars 312 are steel bars with a diameter of 8 mm, the table plates 322 are steel plates with a thickness of 20 mm, and the sleeve caps 321 are steel sleeve caps with an inner diameter of 22 mm. The support leg bars 311 and the foot bars 312 are welded, and the table plates 332 and the sleeve caps 321 are welded.

[0052] Embodiment two is described in Figure 1 、 5 -7, 12, and different from embodiment one, in this embodiment, four support bases 3 are arranged on the lower platform template system, and the reinforcing frame vertical bars 7 are arranged as follows: cross frame vertical bars 72 are arranged around the two outer longitudinal support bases 3, and parallel frame vertical bars 71 are arranged around the two inner longitudinal support bases 3. The cross frame vertical bars 72 cross through the gaps between the adjacent support leg bars 311, and each support base 3 is provided with two corresponding to the corresponding mesh layers, including the bifurcated bottom bar 721 and the bifurcated top bar 722. The bifurcated bottom bar 721 is fixedly connected with the bottom longitudinal bar 511 and the two support leg bars 311 at the diagonal position by binding, and the bifurcated top bar 722 is fixedly connected with the top longitudinal bar 521 and the two support leg bars 311 at the diagonal position by binding.

[0053] The use process of the utility model is as follows:

[0054] Step one, placing the protective layer cushion block 6 and the support column assembly 31 on the template panel 11 of the lower platform template system 1 according to the design, wherein the foot bar 312 falls on the template panel;

[0055] Step two, binding the bottom mesh layer 51;

[0056] Step three, binding the bottom frame vertical bar;

[0057] Step four, binding the top mesh layer 52;

[0058] Step five, binding the top frame vertical bar;

[0059] Step six, assembling the supporting table assembly 32 and the support column assembly 31; inserting the top of each support leg bar 311 into the corresponding sleeve cap 321;

[0060] Step seven, erecting the formwork steel pipe frame 4, wherein the bottom of the vertical rod 41 is sleeved outside the center limiting part 323 of the supporting table assembly 32, and the bottom surface of the vertical rod 41 falls on the table plate 322;

[0061] Step eight, erecting the upper platform template system 2 on the top of the formwork steel pipe frame 4;

[0062] Step nine, pouring concrete 8 on the construction platform;

[0063] Step ten, when the need for turnover demolition, first remove the formwork steel pipe frame 4, the vertical rod 41 and the support platform assembly 32 are separated, and then the top of the exposed support leg rod 311 is cut along the top surface of the concrete; Then remove and turn over the support platform assembly 32 to the next construction site.

Claims

1. A cast-in-place stair platform-to-platform footing formwork support structure, supported between a lower platform formwork system (1) and an upper platform formwork system (2), characterised in that: The supporting base (3) and the formwork steel pipe frame (4) are provided with a plurality of vertical rods (41), The supporting base (3) is provided in one-to-one correspondence with the vertical rods (41), and includes two support column assemblies (31) and a supporting table assembly (32). The two support column assemblies (31) are arranged in transverse parallelism, and each support column assembly (31) is located in the same plane and includes two supporting leg rods (311) and a transverse foot rod (312). The supporting leg rods (311) are arranged in transverse rows, and the two ends of the foot rod (312) are fixedly connected between the bottom ends of the two supporting leg rods (311) and are extended outward. The bottom surfaces of the two foot rods (312) of each supporting base (3) are located in the same plane. The supporting table assembly (32) includes a sleeve cap (321), a table plate (322) and a central limiting portion (323). The top surface of the sleeve cap (321) is flush with and fixedly connected to the bottom surface of the table plate (322) at the four corners. The sleeve cap (321) is arranged in one-to-one correspondence and central alignment with the supporting leg rods (311). The bottom of the sleeve cap (321) is provided with an opening, and the top of the supporting leg rod (311) is inserted into the opening and detachably sleeved with the corresponding sleeve cap (321). The bottom of the vertical rod (41) is sleeved outside the central limiting portion (323) and placed on the top surface of the table plate (322).

2. The cast-in-place stair landing base formwork support structure of claim 1, wherein: The formwork panel (11) of the lower platform formwork system (1) is also included, and the bottom surfaces of the foot rods (312) are placed on the top surface of the formwork panel (11). The lower platform steel reinforcement (5) is also included, which includes a bottom reinforcement mesh layer (51) and a top reinforcement mesh layer (52). The bottom reinforcement mesh layer (51) includes a bottom longitudinal reinforcement (511) and a bottom transverse reinforcement (512), and the bottom transverse reinforcement (512) is located below the bottom longitudinal reinforcement (511). The top reinforcement mesh layer (52) includes a top longitudinal reinforcement (521) and a top transverse reinforcement (522), and the top transverse reinforcement (522) is located below the top longitudinal reinforcement (521).

3. The cast-in-place stair landing base formwork support structure of claim 2, wherein: The bottom longitudinal reinforcement (511) and the top longitudinal reinforcement (521) are longitudinally passed through the gap between the transversely adjacent supporting leg rods (311). The bottom reinforcement mesh layer (51) and the formwork panel (11) are elevated by the protective layer cushion block (6), and the top surface of the supporting leg rod (311) is not higher than the top surface of the bottom transverse reinforcement (512).

4. The cast-in-place stair landing base formwork support structure of claim 3, wherein: The reinforcing frame vertical reinforcement (7) arranged around the supporting base (3) is also included. The reinforcing frame vertical reinforcement (7) is provided in two layers and corresponds to the corresponding reinforcement mesh layer. The reinforcing frame vertical reinforcement (7), the corresponding reinforcement mesh layer and the adjacent supporting leg rod (311) are fixedly connected by binding. The reinforcing frame vertical reinforcement (7) is parallel frame vertical reinforcement (71) and / or cross frame vertical reinforcement (72).

5. The cast-in-place stair landing base-permanent formwork support structure according to claim 4, wherein: The reinforcing frame uprights (7) are parallel reinforcing frame uprights (71), which are longitudinally arranged and arranged on the outer side of the adjacent supporting leg rods (311). Each supporting base (3) is provided with four parallel reinforcing frame uprights (71), including two parallel bottom bars (711) and two parallel top bars (712) arranged on the two sides of the supporting base (3) in the transverse direction. The parallel bottom bars (711) are located in the same horizontal plane as the bottom longitudinal bars (511), and are fixedly connected by binding with the bottom transverse bars (512) and the two supporting leg rods (311) on the same side. The parallel top bars (712) are located in the same horizontal plane as the top longitudinal bars (521), and are fixedly connected by binding with the top transverse bars (522) and the two supporting leg rods (311) on the same side.

6. The cast-in-place stair landing base-permanent formwork support structure according to claim 4, wherein: The reinforcing frame uprights (7) are cross reinforcing frame uprights (72), which cross through the gap between the adjacent supporting leg rods (311). Each supporting base (3) is provided with two cross reinforcing frame uprights (72) corresponding to the corresponding reinforcing mesh layer, including a bifurcated bottom bar (721) and a bifurcated top bar (722). The bifurcated bottom bar (721) is fixedly connected by binding with the bottom longitudinal bars (511) and the two supporting leg rods (311) located at the diagonal position. The bifurcated top bar (722) is fixedly connected by binding with the top longitudinal bars (521) and the two supporting leg rods (311) located at the diagonal position.

7. The cast-in-place stair landing base-permanent formwork support structure according to claim 1, wherein: The bottom end of the vertical rod (41) is connected with a connecting sleeve (42), the inner diameter of the connecting sleeve (42) is adapted to the outer diameter of the vertical rod (41) and is fixedly connected, and the inner diameter of the connecting sleeve (42) is greater than the outer diameter of the center limiting part (323).

8. The cast-in-place stair landing base-permanent formwork support structure according to claim 7, wherein: The platform (322) is a rectangular plate, and the center limiting part (323) is a reinforcing steel bar or a steel pipe fixedly connected to the center of the platform (322) and arranged vertically. When the center limiting part (323) is a reinforcing steel bar, the height of the reinforcing steel bar is greater than the height of the center limiting part (323). When the center limiting part (323) is a steel pipe, the height of the steel pipe is less than the height of the center limiting part (323).

9. The cast-in-place stair landing base-permanent formwork support structure according to claim 8, wherein: The connecting sleeve (42) is provided with a first pin hole (43) transversely arranged, and the center limiting part (323) is provided with a second pin hole (324) transversely arranged corresponding to the position of the steel pipe. The first pin hole (43) is aligned with the second pin hole (324) and is connected by a pin.

10. The cast-in-place stair platform-to-platform footing form-tieback structure according to claim 1, wherein: The sleeve cap (321) is a vertical sleeve, and the bottom surface of the sleeve cap (321) is located above the top reinforcing mesh layer (52) and is not lower than the top surface of the platform pouring concrete (8).

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