Universal base for floor hanging formwork and construction method thereof

Abstract

The present invention discloses a universal base for floor hanging formwork and a construction method thereof, wherein the base comprises a lower support, wherein the lower support comprises a vertically arranged lower tube and a bottom plate fixedly connected to the bottom of the lower tube, wherein the lower tube is threadedly connected to the lower part of the upper support, the top of the upper support has a supporting surface, and the bottom plate is provided with threaded holes. The beneficial effects of the present invention are as follows: it has the characteristics of accurate positioning, convenient installation, strong versatility, safety and stability, and can replace traditional hanging formwork support methods such as secondary casting method, steel bar bracket method, and pad support method, eliminate the quality defects such as mold expansion, slurry leakage, and misalignment that are common in hanging formwork construction, effectively prevent safety hazards caused by illegal spot welding of stressed steel bars, improve the integrity and self-waterproofing ability of the concrete structure, fundamentally guarantee the construction quality and waterproofing performance of the floor flip-up structure, and thoroughly solve the quality problem of leakage at the root of the building wall.

Description

Technical Field

[0001] The invention relates to the technical field of floor hanging formwork, and in particular to a universal base for floor hanging formwork and a construction method thereof. Background Art

[0002] Suspension formwork, also known as hanging formwork, refers to a formwork that cannot be supported on the ground and is suspended on other fixed objects. It is generally used in places with height differences such as floor structures. The most obvious difference from other formwork construction is that there is no support at the bottom or it is supported and fixed in a special way to bear lateral loads and maintain the stability of the suspended formwork, thereby ensuring that the horizontality and verticality of the cast-in-place concrete components meet the requirements.

[0003] In the prior art, the floor formwork structure is generally cast in one piece with the floor panel and cast in a secondary joint. When the secondary casting method is adopted, the roughening and cleaning of the floor joints are often not in place, and the treatment effect of the base layer is difficult to meet the standard requirements. A horizontal construction joint is formed between the separately cast structures, and the bonding strength and integrity of the joints are poor, there is a serious leakage risk, and the structural construction quality and waterproof effect cannot be guaranteed; at the same time, the side formwork reinforcement method of the secondary casting structure generally adopts the method of drilling holes and anchoring steel bars to fix the formwork on the cast-in-place slab, forming a plurality of vertical holes inside the cast-in-place slab, which increases the vertical leakage risk to the cast-in-place floor, especially the floor of the water room; in addition, the secondary casting structure is a sporadic concrete component, and the degree of attention and supervision on site are often insufficient. The construction team is prone to carelessness. The formwork, support, etc. are mostly defective materials that have been circulated many times, and the concrete volume is small and mostly mixed on site, which can easily lead to rough quality of the finished product and fail to meet the design function.

[0004] Therefore, in order to ensure the construction quality and waterproof effect of cast-in-place concrete structure, the floor formwork structure should preferably adopt the construction scheme of integral casting with the floor slab. In the current conventional process technology, the formwork support of the integrally formed floor formwork generally adopts the following two methods:

[0005] 1. Steel bar support method: I-shaped positioning bars are vertically welded on the tied beam and slab reinforcement according to the bottom elevation of the hanging formwork. The positioning bars are made of steel bars larger than Φ12. Then, the two side formworks are supported on them. Tension bolts are set on the upper part of the side formwork to lock it. The oblique support is used to tighten and reinforce it. Finally, the line is pulled to straighten the side formwork.

[0006] This construction method has many operating procedures and requires a large number of reinforcement bars and supports. It requires a large amount of material and labor, is time-consuming and labor-intensive, has high costs, and has low work efficiency. In addition, the beam and slab reinforcement bars themselves have poor stability, and the overall strength and deformation resistance of the hanging formwork on the bracket are insufficient to withstand the construction load during concrete pouring. The hanging formwork is forced to tilt or shift outward, resulting in deformation of the formwork, or settlement under vertical loads. The bottom of the hanging formwork is embedded in the cast-in-place slab concrete, forming a structural defect and making it impossible to remove the formwork. The welding of the locating bars and the beam and slab stress-bearing reinforcement bars mostly adopts arc spot welding, which causes undercutting and burns to the stress-bearing reinforcement bars, reduces the effective cross-section of the reinforcement bars, and produces stress concentration, affecting their stress-bearing performance and structural safety. The joints of the hanging formwork are not easy to support firmly on the locating bars, which will cause unevenness and plane misalignment of the side formwork joints, resulting in quality defects such as side formwork leakage and component misalignment.

[0007] 2. Pad support method: Mortar or concrete pads are placed at a certain interval on the bottom form of the cast-in-place slab. The height of the pads is the same as the thickness of the cast-in-place slab. Then the two side formworks are supported on the pads, and the side formwork is reinforced with tension bolts and diagonal supports.

[0008] This construction method makes it difficult to ensure the stability of the hanging formwork. The pads are difficult to fix to the bottom formwork of the cast-in-place slab, and cannot be tied to the beam and slab steel bars. They are easy to slip under load, resulting in unstable displacement of the hanging formwork. Mortar or concrete pads are mostly made on-site, and their strength is generally difficult to reach the structural design strength. They are easily damaged under stress. At the same time, the bottom surface of the pads is tightly attached to the bottom formwork of the cast-in-place slab, and the cement slurry cannot wrap it, causing the pads to be exposed after the formwork is removed, affecting the appearance quality of the structure. The pads buried in the cast-in-place slab have poor adhesion to the newly poured concrete, and there is a risk of leakage on the contact surface, which can easily lead to water seepage in the floor or structural cracks, weakening the structural performance and waterproof function of the concrete.

[0009] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0010] In view of the above technical problems in the related art, the present invention proposes a universal base for floor hanging formwork and a construction method thereof, which can overcome the above shortcomings of the prior art.

[0011] To achieve the above technical objectives, the technical solution of the present invention is implemented as follows:

[0012] A universal base for a floor hanging formwork comprises a lower support, wherein the lower support comprises a vertically arranged lower tube and a bottom plate fixedly connected to the bottom of the lower tube, the lower tube is threadedly connected to the lower part of an upper support, the top of the upper support has a supporting surface, and the bottom plate is provided with a threaded hole.

[0013] Furthermore, an internal thread is provided on the inner wall of the lower cylinder, the upper support includes a vertically arranged upper cylinder and a top plate fixedly connected to the top of the upper cylinder, the supporting surface is located at the top of the top plate, the upper cylinder corresponds to the lower cylinder, and an external thread matching the internal thread is provided on the outer wall of the upper cylinder.

[0014] Furthermore, a protrusion is fixedly provided on the top of the bottom plate, the threaded hole extends to the inside of the protrusion, and the upper tube is sleeved on the outside of the protrusion.

[0015] Furthermore, the upper cylinder includes a plurality of support ribs arranged at intervals in the circumferential direction, and a gap between two adjacent support ribs is communicated with the interior of the upper cylinder.

[0016] Furthermore, a water stop ring is sleeved on the upper part of the lower tube.

[0017] Furthermore, a limiting block is fixedly provided on the top of the top plate, and the top of the top plate can be detachably connected to a limiting angle steel, and the limiting angle steel and the limiting block are opposite to each other.

[0018] The present invention also provides a construction method for a universal base for a floor hanging formwork, comprising the following steps:

[0019] S1: drilling bolt holes on the bottom mold of the cast-in-place slab, inserting bolts, and screwing the upper ends of the bolts into the threaded holes of the lower support to fix the lower support;

[0020] S2 performs beam and slab reinforcement tying;

[0021] S3: at least partially screwing the upper cylinder of the upper support into the lower cylinder of the lower support to complete the installation of the upper support;

[0022] S4: nail multiple square wood keels arranged at intervals up and down to the outside of the side formwork, and then place them together on the top of the upper support, so that the inner side of the side formwork is pressed against the limit block on the top of the upper support, and then install the formwork clamp, so that the clamping plate of the formwork clamp clamps the square wood keel from the outside, and then install the limiting angle steel on the top of the upper support, so that the limiting angle steel is pressed against the outer side of the lowest square wood keel, and the installation of the hanging formwork is completed;

[0023] S5 pouring floor concrete and suspended formwork structural concrete;

[0024] S6 removes the hanging formwork and cleans it for use.

[0025] Furthermore, the template clamp includes a basket bolt and two clamping plates, and the two clamping plates are fixedly connected to the basket bolt.

[0026] Furthermore, step S5 specifically includes: before pouring concrete, quality inspection is performed on the reinforcement of the scaffolding, the quality of the steel bar binding and installation, and the installation and fixing of the hanging formwork. After acceptance, the floor concrete is poured. The cast-in-place floor is pumped into the formwork with commercial concrete. When pouring the floor concrete, it is leveled and vibrated as it is poured. The floor concrete is filled into the interior of the lower support through the gap between the supporting ribs of the upper support. After the floor concrete is poured, it is paused for a while to wait for the floor concrete to be vibrated and settled, and the hanging formwork structural concrete is poured before initial setting.

[0027] Furthermore, step S6 specifically includes: when the strength of the concrete of the hanging formwork structure reaches 1.2MPa, the formwork clamp is removed, and then the limiting angle steel is removed, and then the bolts are removed, and the side form is tapped to separate it from the concrete. After the demolding is completed, the mortar on the side form is cleaned and the release agent is applied, and the upper support and the lower support are both retained inside the floor concrete.

[0028] The beneficial effects of the present invention are as follows: it has the characteristics of accurate positioning, convenient installation, strong versatility, safety and stability, etc. It can replace traditional hanging formwork support methods such as secondary pouring method, steel bar bracket method, pad support method, etc., eliminate the quality defects such as mold expansion, slurry leakage, and misalignment that are common in hanging formwork construction, effectively prevent the safety hazards caused by illegal spot welding of stressed steel bars, improve the integrity and self-waterproofing ability of the concrete structure, fundamentally guarantee the construction quality and waterproofing performance of the floor turn-over structure, and thoroughly solve the quality problem of leakage at the root of the building wall; it has exquisite design and simple structure, and is especially suitable for factory-scale mass production The universal base of the floor hanging formwork has high strength, no deformation, good versatility, and the connection and fixing system adopts threaded connection and bolt locking. The on-site installation is simple and quick, with high construction precision and stability and reliability. It simplifies the construction process, reduces the on-site operation workload, improves work efficiency, consumes less auxiliary materials, saves a lot of auxiliary materials and labor costs, and is energy-saving and environmentally friendly. The water stop ring 2 and external thread of the universal base of the floor hanging formwork can effectively prevent hidden dangers of structural leakage, improve the overall quality of cast-in-place structural engineering, and promote the development of traditional construction technology towards toolization and standardization, and has good application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a front view of a universal base for floor hanging formwork according to an embodiment of the present invention;

[0031] Figure 2 is an axial view of a universal base for floor hanging formwork according to an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of an upper support according to an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of a lower support according to an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the universal base for floor hanging formwork according to an embodiment of the present invention when in use.

[0035] In the figure:

[0036] 1. Upper support; 2. Water stop ring; 3. Lower support; 4. Threaded hole; 5. Protrusion; 6. Support rib plate; 7. Limit block; 8. Limit angle steel; 9. Cast-in-place slab bottom formwork; 10. Bolt; 11. Side formwork; 12. Square timber keel; 13. Basket bolt; 14. Plywood; 15. Floor concrete. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0038] like Figure 1-5 As shown, a universal base for floor hanging formwork according to an embodiment of the present invention includes a lower support 3, wherein the lower support 3 includes a vertically arranged lower tube and a bottom plate fixedly connected to the bottom of the lower tube, the lower tube is threadedly connected to the lower part of the upper support 1, the top of the upper support 1 has a supporting surface, and a threaded hole 4 is opened on the bottom plate.

[0039] In a specific embodiment of the present invention, an internal thread is provided on the inner wall of the lower cylinder, the upper support 1 includes a vertically arranged upper cylinder and a top plate fixedly connected to the top of the upper cylinder, the supporting surface is located at the top of the top plate, the upper cylinder corresponds to the lower cylinder, and an external thread matching the internal thread is provided on the outer wall of the upper cylinder.

[0040] In a specific embodiment of the present invention, a protrusion 5 is fixedly provided on the top of the bottom plate, the threaded hole 4 extends to the inside of the protrusion 5 , and the upper tube is sleeved on the outside of the protrusion 5 .

[0041] In a specific embodiment of the present invention, the upper cylinder includes a plurality of support ribs 6 arranged at intervals in the circumferential direction, and a gap between two adjacent support ribs 6 is communicated with the interior of the upper cylinder.

[0042] In a specific embodiment of the present invention, a water stop ring 2 is sleeved on the upper portion of the lower cylinder.

[0043] In a specific embodiment of the present invention, a limit block 7 is fixedly provided on the top of the top plate, and a limit angle steel 8 is detachably connected to the top of the top plate, and the limit angle steel 8 and the limit block 7 are opposite to each other.

[0044] The present invention also provides a construction method for a universal base for a floor hanging formwork, comprising the following steps:

[0045] S1: Drilling bolt holes on the bottom mold 9 of the cast-in-place slab, inserting bolts 10, and screwing the upper ends of the bolts 10 into the threaded holes 4 of the lower support 3 to complete the fixing of the lower support 3;

[0046] S2 performs beam and slab reinforcement tying;

[0047] S3: at least partially screw the upper tube of the upper support 1 into the lower tube of the lower support 3 to complete the installation of the upper support 1;

[0048] S4: nail multiple square wood keels 12 arranged at intervals up and down to the outside of the side form 11, and then place them together on the top of the upper support 1, so that the inner side of the side form 11 is pressed tightly against the limit block 7 on the top of the upper support 1, and then install the formwork clamp, so that the clamping plate 14 of the formwork clamp clamps the square wood keel 12 from the outside, and then install the limiting angle steel 8 on the top of the upper support 1, so that the limiting angle steel 8 is close to the outer side of the lowest square wood keel 12, and the installation of the hanging formwork is completed;

[0049] S5 pouring floor concrete 15 and hanging formwork structural concrete;

[0050] S6 removes the hanging formwork and cleans it for use.

[0051] In a specific embodiment of the present invention, the template clamp includes a turnbuckle bolt 13 and two clamping plates 14 , and the two clamping plates 14 are fixedly connected to the turnbuckle bolt 13 .

[0052] In a specific embodiment of the present invention, step S5 specifically includes: before pouring concrete, quality inspection is performed on the reinforcement of the scaffolding, the quality of the steel bar binding and installation, and the installation and fixing of the hanging formwork. After acceptance, the floor concrete 15 is poured. The cast-in-place floor is pumped into the formwork with commercial concrete. When pouring the floor concrete 15, it is flattened and vibrated as it is poured. The floor concrete 15 is filled into the interior of the lower support 3 through the gap between the supporting ribs 6 of the upper support 1. After the floor concrete 15 is poured, it is paused for a while, and the floor concrete 15 is vibrated and settled, and the hanging formwork structural concrete is poured before initial setting.

[0053] In a specific embodiment of the present invention, step S6 specifically includes: when the strength of the concrete of the hanging formwork structure reaches 1.2MPa, the formwork clamp is removed, and then the limiting angle steel 8 is removed, and then the bolt 10 is removed, and the side form 11 is tapped to separate it from the concrete. After the demolding is completed, the mortar on the side form 11 is cleaned and the release agent is applied, and the upper support 1 and the lower support 3 are both retained inside the floor concrete 15.

[0054] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0055] The universal base of the floor formwork described in the present invention comprises an upper support 1, a water stop ring 2, a lower support 3 and a limiting angle steel 8. The upper support 1 and the lower support 3 are made of PE material and customized by a professional manufacturer, and the limiting angle steel 8 can be made on site. The production method is as follows:

[0056] (1) Make the lower support.

[0057] The lower support 3 is made of PE material and customized by a professional manufacturer. It has a cylindrical structure, is 60mm high, 6mm thick, and has an outer diameter of 132mm. The lower support 3 includes a lower tube and a bottom plate. A water stop ring 2 is arranged on the upper part of the lower tube, and the diameter of the water stop ring 2 is 172mm; an internal thread is arranged on the inner wall of the lower tube, and the bottom of the lower tube is a 6mm thick bottom plate. A protrusion 5 is provided at the center of the bottom plate, and an M12 threaded hole 4 is provided. The threaded hole 4 is 35mm long, and the upper end of the threaded hole 4 is closed; the bottom plate is centered on the threaded hole 4, and three triangular 6mm thick PE plates are radially connected, and the PE plate is connected to the bottom plate and the protrusion 5 as a reinforcing rib plate.

[0058] (2) Make the upper support.

[0059] The upper support 1 is made of PE material and customized by a professional manufacturer. It is a cylindrical structure with hollowed-out side walls, 100 mm high, 6 mm thick, and 120 mm in outer diameter. The upper support 1 includes an upper tube and a top plate. The upper part is a 10 mm thick top plate, with a 20 mm high stopper 7 protruding locally on the top plate. The upper tube includes an annular plate and a supporting rib plate 6. The lower part of the upper tube is a 20 mm high annular plate. The upper end of the annular plate is fixedly connected to four 30 mm wide supporting rib plates 6 arranged symmetrically in an annular direction. The supporting rib plates 6 are respectively connected to the top plate and the annular plate as a whole; the outer walls of the supporting rib plates 6 and the annular plate are both provided with external threads, and the outer diameter and pitch of the external threads match the internal threads on the inner wall of the lower support 3.

[0060] (3) Make limit angle steel.

[0061] The limiting angle steel 8 can be obtained by cutting off an 80mm long 40*40*5mm angle steel and drilling a Æ6mm bolt hole on the plane side rib.

[0062] The construction method is as follows:

[0063] (1) Measurement and layout.

[0064] First, install the cast-in-place steel pipe support for the floor. The support is constructed with Æ48×3mm steel pipe. Then lay the bottom formwork keel. Use 50*70mm square wood to lay on the support crossbar with a center spacing of 250mm. The cast-in-place slab bottom formwork 9 is nailed to the wooden keel with 15mm thick double-sided laminated wood plywood. Adjust the elevation of the cast-in-place slab bottom formwork 9 to meet the design requirements. Accurately lay out the center line of the hanging formwork edge line and the center line of the universal base of the floor hanging formwork (hereinafter referred to as the base) on the cast-in-place slab bottom formwork 9. The distance between the center line of the hanging formwork edge line and the base is 40mm.

[0065] The base spacing is determined by calculation, which is generally not more than 1.2m. The vertical and horizontal cross lines of the base center are popped up according to the calculated spacing and marked with red paint. The lower keel of the cast-in-place slab bottom formwork 9 should be careful to avoid the center position of the base.

[0066] (2) Install the lower support.

[0067] Install the lower support 3 according to the center cross line of the base, and drill a Æ12mm bolt through hole on the cast-in-place slab bottom formwork 9 corresponding to the cross line position drawn on the cast-in-place slab bottom formwork 9. After placing the lower support 3 in place, insert the M12 bolt 10 through the bolt through hole below the cast-in-place slab bottom formwork 9, and corresponding to the threaded hole 4 on the lower support 3, the upper end of the bolt 10 is screwed into the threaded hole 4, and a gasket is added to the bottom of the cast-in-place slab bottom formwork 9 and fastened with a fixing nut to anchor the lower support 3 to the cast-in-place slab bottom formwork 9, so that its positioning is accurate and stable, and to prevent floating or bottom leakage during pouring of floor concrete 15.

[0068] (3) Beam and slab reinforcement binding.

[0069] After the lower support 3 is installed and fixed, the beam and slab reinforcement is tied. The original steel bar material and cutting size meet the design requirements. The steel mesh and the negative bending moment reinforcement on the top of the slab are tied firmly and accurately. The protective layer pads and steel bar horse stools are set in accordance with the specifications. The spacing, quantity and thickness of the steel bars should meet the design and specification requirements. When the lower support 3 conflicts with the position of the force-bearing steel bars of the cast-in-place slab, the position of the cast-in-place slab steel bars can be slightly moved to adjust.

[0070] (4) Install the upper support.

[0071] The upper support 1 and the lower support 3 are assembled and connected by their respective internal and external threaded connections. The base height is adjusted using the internal and external threads until it is the same as the thickness of the cast-in-place slab, and the outer side surface of the limit block 7 of the upper support 1 is parallel to the edge line of the hanging mold and located on the inner side of the side mold 11.

[0072] (5) Installation and fixation of hanging formwork.

[0073] The side formwork 11 of the hanging formwork is made of 15mm thick double-sided laminated wood plywood in blocks. The length of a single block is formulated as an integer multiple of the base spacing so that the joint position of the side formwork 11 is located on the base. The square wood keel 12 of the side formwork 11 adopts 50*50mm square wood that is set horizontally throughout the length. The side formwork 11 and the square wood keel 12 are nailed firmly with inch nails at a spacing of 300mm.

[0074] After the beam and slab reinforcement is tied, the hanging formwork can be installed. The side formwork 11 is installed piece by piece, and the side formwork 11 and the square wood keel 12 are supported on the installed base respectively. The inner side of the side formwork 11 is pressed tightly against the limit block 7 of the upper support 1. Then the formwork clamp is installed and arranged at a horizontal spacing of 600mm. The formwork clamp clamps the square wood keel 12 from the outside of the hanging formwork, and the M12 basket bolts 13 of the formwork clamp are adjusted. The side formwork 11 is clamped and locked with the clamp 14 to form a hanging formwork support system; the line is pulled to straighten and correct the position of the hanging formwork axis so that the verticality and flatness of the side formwork 11 meet the requirements. Then, the limiting angle steel 8 is pressed against the outside of the square wood keel 12, and the M5 self-tapping screws are used to pass through the Æ6mm bolt holes on the limiting angle steel 8 to anchor the limiting angle steel 8 to the top plate of the upper support 1 to ensure that the bottom positioning of the hanging formwork is accurate and stable.

[0075] (6) Pour floor concrete and suspended formwork structural concrete.

[0076] Before pouring the floor concrete 15, the on-site quality inspector conducts quality inspection on the structural elevation, the cast-in-place slab bottom formwork 9 and the reinforcement of the scaffolding, the quality of the steel bar binding installation, and the installation and fixing of the hanging formwork. After meeting the design and specification requirements, the inspection and acceptance are reported. After passing the inspection, the floor concrete 15 can be poured. The cast-in-place floor adopts commercial concrete pumping into the mold. The floor concrete 15 is poured first, and the floor concrete 15 is flattened and vibrated as it is poured. The floor concrete 15 fills the inside of the base through the gap of the supporting rib plate 6 of the upper support 1, which can further stabilize the position of the base to prevent displacement and avoid weak parts inside the cast-in-place structure. After the floor concrete 15 is poured, it is stopped for a while, and the floor concrete 15 is vibrated and settled, and the hanging formwork structural concrete is poured before the initial setting. In order to prevent the bottom of the hanging formwork from turning over, the upper surface is smoothed with a wooden trowel as it is poured.

[0077] During pouring construction, construction workers should be careful not to step on the base or be tripped by it, and avoid directly impacting the hanging formwork and its reinforcement system when pouring concrete. When vibrating, the vibrating rod should also be prevented from touching the base and side formwork 11 to prevent impact and vibration from causing them to shift.

[0078] (7) Remove the hanging formwork.

[0079] When the strength of the concrete in the hanging formwork structure reaches 1.2MPa, remove the hanging formwork. First, loosen the M12 basket bolt 13 on the upper part of the formwork clamp, remove the formwork clamp, and then use a hand drill or screwdriver to loosen the M5 self-tapping screw on the limit angle steel 8, remove the limit angle steel 8, and then withdraw the bolt 10 that anchors the lower support 3 at the bottom of the cast-in-place slab bottom formwork 9, tap the side formwork 11 to separate it from the concrete, and after demolding, clean the mortar on the side formwork 11 and apply the release agent.

[0080] The base is left inside the cast-in-place slab concrete. The water stop ring 2 in the middle of the base and the external thread on the outer side of the upper support 1 can play a double role of water stopping and anti-seepage, effectively preventing the hidden danger of structural leakage.

[0081] (8) Tool collection and turnover.

[0082] The disassembled formwork clamps, limit angle steels 8, bolts 10 and other parts should be collected and cleaned in time. Damaged parts should be replaced in time, stored in a dry place, and treated with anti-corrosion and anti-rust for continued circulation.

[0083] In summary, with the help of the above technical scheme of the present invention, it has the characteristics of accurate positioning, convenient installation, strong versatility, safety and stability, etc., and can replace traditional hanging formwork support methods such as secondary pouring method, steel bar bracket method, pad support method, etc., eliminate the quality defects such as mold expansion, slurry leakage, and misalignment that are common in hanging formwork construction, effectively prevent the safety hazards caused by illegal spot welding of stressed steel bars, improve the integrity and self-waterproofing ability of the concrete structure, fundamentally guarantee the construction quality and waterproofing performance of the floor turn-over structure, and completely solve the quality problem of leakage at the root of the building wall; it has exquisite design and simple structure, and is especially suitable for factories. The universal base of the floor hanging formwork has high strength, no deformation, good versatility, and the connection and fixing system adopts threaded connection and bolt locking. The on-site installation is simple and quick, the construction precision is high, and it is stable and reliable. The construction process is simplified, the on-site operation workload is reduced, the work efficiency is improved, the number of auxiliary materials consumed is small, a large amount of auxiliary materials and labor costs are saved, and it is energy-saving and environmentally friendly. The water stop ring 2 and the external thread of the universal base of the floor hanging formwork can effectively prevent the hidden dangers of structural leakage, improve the overall quality of cast-in-place structural engineering, and promote the development of traditional construction technology towards toolization and standardization, and it has good application value.

[0084] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A universal base for floor hanging formwork, characterized in that: The lower support (3) comprises a lower cylinder arranged vertically and a bottom plate fixedly connected to the bottom of the lower cylinder, the lower cylinder is threadedly connected to the lower part of the upper support (1), the top of the upper support (1) has a supporting surface, and the bottom plate is provided with a threaded hole (4); An internal thread is arranged on the inner wall of the lower cylinder, the upper support (1) comprises an upper cylinder arranged vertically and a top plate fixedly connected to the top of the upper cylinder, the support surface is located on the top of the top plate, the upper cylinder corresponds to the lower cylinder, and an external thread matching the internal thread is arranged on the outer wall of the upper cylinder; A protrusion (5) is fixedly provided on the top of the bottom plate, the threaded hole (4) extends to the inside of the protrusion (5), and the upper tube is sleeved on the outside of the protrusion (5); The upper cylinder comprises a plurality of support ribs (6) arranged at intervals in the circumferential direction, and a gap between two adjacent support ribs (6) is communicated with the interior of the upper cylinder; A limit block (7) is fixedly provided on the top of the top plate, and a limit angle steel (8) is detachably connected to the top of the top plate, wherein the limit angle steel (8) and the limit block (7) are opposite to each other; The upper part of the lower cylinder is sleeved with a water stop ring (2).

2. A construction method for the universal base of the floor hanging formwork as claimed in claim 1, characterized in that: The following steps are involved: S1: drilling a bolt through hole on the bottom mold (9) of the cast-in-place slab, inserting a bolt (10), and screwing the upper end of the bolt (10) into the threaded hole (4) of the lower support (3), thereby completing the fixing of the lower support (3); S2 performs beam and slab reinforcement tying; S3: at least partially screwing the upper tube of the upper support (1) into the lower tube of the lower support (3), thereby completing the installation of the upper support (1); S4: nailing a plurality of square timber keels (12) arranged at intervals in the upper and lower parts to the outside of the side formwork (11), and then placing them together on the top of the upper support (1), so that the inner side of the side formwork (11) is pressed tightly against the limit block (7) on the top of the upper support (1), and then installing a formwork clamp, so that the clamping plate (14) of the formwork clamp clamps the square timber keel (12) from the outside, and then installing a limit angle steel (8) on the top of the upper support (1), so that the limit angle steel (8) is pressed tightly against the outer side of the lowest square timber keel (12), and the installation of the hanging formwork is completed; S5 pouring floor concrete (15) and suspended formwork structural concrete; S6 removes the hanging formwork and cleans it for use.

3. The construction method of the universal base for floor hanging formwork according to claim 2 is characterized in that: The template clamp comprises a turnbuckle bolt (13) and two clamping plates (14), and the two clamping plates (14) are both fixedly connected to the turnbuckle bolt (13).

4. The construction method of the universal base for floor hanging formwork according to claim 2 is characterized in that: Step S5 specifically includes: before pouring concrete, quality inspection is performed on the reinforcement of the scaffolding, the quality of the steel bar binding and installation, and the installation and fixing of the hanging formwork. After acceptance, the floor concrete (15) is poured. The cast-in-place floor is pumped into the formwork using commercial concrete. When pouring the floor concrete (15), it is leveled and vibrated. The floor concrete (15) is filled into the interior of the lower support (3) through the gap between the support ribs (6) of the upper support (1). After the pouring of the floor concrete (15) is completed, it is paused for a while to wait for the floor concrete (15) to be vibrated and settled, and the hanging formwork structural concrete is poured before initial setting.

5. The construction method of the universal base for floor hanging formwork according to claim 2 is characterized in that: Step S6 specifically includes: when the strength of the concrete of the suspended formwork structure reaches 1.2 MPa, removing the formwork clamp, then removing the limiting angle steel (8), then removing the bolt (10), tapping the side form (11) to separate it from the concrete, cleaning the mortar on the side form (11) and applying a release agent after demoulding, and the upper support (1) and the lower support (3) are both left inside the floor concrete (15).

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