A pre-supported and then installed fixed-shape early-dismantling formwork system and its construction method

Abstract

The present invention discloses a pre-supported and then installed early-dismantling template system, comprising a support system and a template system; the support system comprises a support frame, a top support, a support beam and a bottom support device; the support frame is an integral support formed by scaffolding steel pipes; the top support comprises an early-dismantling top support and a common top support; the support beam comprises a bottom support beam and a bottom support beam; the template system comprises a floor template, a rear-dismantling pad, a beam side template and a bottom template, the floor template is located on the bottom support beam; the bottom template is located on the upper side of the bottom support device, and the side templates are located on both sides of the bottom template. The present invention greatly reduces the strength and rigidity requirements of the fixed template, thereby reducing the weight, cost and processing difficulty of the fixed template, effectively solving the problem that the fixed template is difficult to adapt to the overall support system, and has a larger application range.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and relates to an early dismantling formwork system, in particular to an early dismantling formwork system that is first supported and then assembled and formed, and a construction method thereof. Background Art

[0002] Early formwork removal is a formwork device and method used to achieve early removal of floor formwork. Its working principle is "remove the floor but not the column". As long as the concrete strength reaches 50% of the design strength, the floor formwork and part of the supporting poles can be removed, while most of the supporting columns and adjustable supports remain in the supporting state. When the concrete strength reaches the design requirements, all the supporting poles are removed. Early formwork removal is divided into the first support and then installation method and the first installation and then support method according to the construction sequence, and is divided into the overall support system and the single-pole support system according to the type of support system. The first support and then installation method is to first set up the formwork support system and then install the formwork; the first installation and then support method is to first install the formwork and then support or to install the formwork while supporting; the overall support system is to use various types of scaffolding steel pipes to set up the formwork support into an integral frame, and the overall support system is constructed by the first support and then installation method; the single-pole support system is that each supporting pole is set up separately, and the single-pole support system is constructed by the first installation and then support method. The support frame of the integral support system has a large support capacity and stability, and has low requirements for the strength and rigidity of the formwork. However, the integral support poles erected by the integral support system using the method of supporting first and installing later are difficult to accurately position, and the shaped formwork is difficult to adapt to the method of supporting first and installing later; the poles of the single-rod support system themselves are not stable, and it requires the formwork to have greater strength and rigidity to ensure the stability of the entire formwork system, which increases the weight, cost, and processing difficulty of the formwork, greatly reducing the application scope of the shaped formwork and early dismantling formwork technology; currently, steel frame plywood formwork, ribbed plastic formwork, aluminum alloy and other shaped formworks mostly use a single-rod support system and the method of installing first and supporting later. Due to the large weight, high cost, and poor size adaptability of these formworks, they are now only used in some high-rise buildings with small structural changes. If the shaped formwork can be used in the early dismantling formwork system of the integral support of supporting first and installing later, the weight, cost, and processing difficulty of the formwork can be greatly reduced, greatly increasing its application scope. Summary of the invention

[0003] The purpose of the present invention is to provide a pre-supported and then installed early-dismantling formwork system and a construction method thereof, which greatly reduces the strength and rigidity requirements of the finalized formwork, thereby reducing the weight, cost and processing difficulty of the finalized formwork, and effectively solves the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a pre-support and post-installation fixed-shape early-dismantling formwork system, including a support system and a formwork system;

[0005] The support system comprises a support frame, a top support, a support beam and a bottom support device for the beam; the support frame is an integral support formed by scaffolding steel pipes, and comprises a slab bottom rear-removal support upright, a slab bottom early-removal support upright, a beam bottom rear-removal support upright, a beam bottom early-removal support upright and a connecting crossbar; the top support comprises an early-removal top support and an ordinary top support, the early-removal top support is respectively positioned at the slab bottom rear-removal support upright and the upper end of the beam bottom rear-removal support upright, the ordinary top support is respectively positioned at the slab bottom early-removal support upright and the upper end of the beam bottom early-removal support upright; the support beam comprises a slab bottom support beam and a beam bottom support beam, the slab bottom support beam and the beam bottom support beam are respectively located on the early-removal top support and the ordinary top support at the corresponding slab bottom and beam bottom positions; the beam bottom support device is arranged at intervals on the beam bottom support beam;

[0006] The template system includes a floor template, a rear dismantling pad, a beam side template and a beam bottom template. The floor template is located on the bottom support beam of the slab. The floor template is formed by linearly splicing a plurality of fixed templates. A triangular notch is provided at the corner of the fixed template at a position corresponding to the rear dismantling support upright at the bottom of the slab. The triangular notches of the four adjacent fixed templates are combined to form a pad notch that is consistent with the outer contour of the rear dismantling pad. The rear dismantling pad is positioned in the pad notch formed by the fixed template.

[0007] The beam bottom template is located on the upper side of the beam bottom support device, the beam side templates are respectively located on both sides of the beam bottom template, and the lower ends of the beam side templates are respectively vertically connected to the two sides of the beam bottom template, and the upper ends of the beam side templates are respectively spliced ​​with the side inner corners corresponding to the floor template;

[0008] The slab bottom post-removal support uprights are evenly arranged along the middle of the floor slab formwork, and the slab bottom early-removal support uprights are arranged between the slab bottom post-removal support uprights and the beam, or between the slab bottom post-removal support uprights and the wall column; the beam bottom post-removal support uprights are evenly arranged along the beam bottom center line in the beam span, and the beam bottom early-removal support uprights are arranged between the beam bottom post-removal support uprights and the wall, or between the beam bottom post-removal support uprights and the column; adjacent support uprights are connected by connecting cross bars to form a stable integral bracket.

[0009] A further technical solution of the present invention is: the early-removal top support includes an early-removal top support screw rod, a top plate, an early-removal support, a first early-removal adjusting nut and a second early-removal adjusting nut. The top plate is arranged on the top of the early-removal top support screw rod and is connected to the early-removal top support screw rod by welding. The early-removal support is movably sleeved on the outside of the early-removal top support screw rod. The first early-removal adjusting nut and the second early-removal adjusting nut are respectively matched with the threads of the early-removal top support screw rod and are located below the early-removal support. The lower ends of the early-removal top support screw rod are respectively positioned at the corresponding rear-removal support uprights at the bottom of the plate and the upper ends of the rear-removal support uprights at the bottom of the beam, and the first early-removal adjusting nut abuts against the upper ends of the corresponding rear-removal support uprights, and the second early-removal adjusting nut abuts against the lower side of the early-removal support. The height of the top plate can be adjusted by rotating the first early-removal adjusting nut, and the height of the early-removal support can be adjusted by rotating the second early-removal adjusting nut.

[0010] A further technical solution of the present invention is: the ordinary jacking support includes an ordinary jacking support screw, a support plate and an adjusting nut, the support plate is arranged on the top of the ordinary jacking support screw and is connected to the ordinary jacking support screw by welding, the adjusting nut is threadedly matched with the ordinary jacking support screw, the lower end of the ordinary jacking support screw is respectively positioned at the corresponding early-dismantling support upright rod at the bottom of the plate and the upper end of the early-dismantling support upright rod at the bottom of the beam, and the adjusting nut is against the upper end of the corresponding early-dismantling support upright rod, and the height of the support plate can be adjusted by rotating the adjusting nut.

[0011] A further technical solution of the present invention is: the beam bottom supporting device includes a supporting cross rib, a handle, a nut, a screw, a collar, a movable stopper and a fixed stopper, the nut and the fixed stopper are respectively connected at two ends of the supporting cross rib, the collar is sleeved on the outer side of the supporting cross rib between the nut and the fixed stopper, and the collar can slide along the supporting cross rib; the movable stopper is connected to the collar, the screw passes through the nut and cooperates with the nut thread, and one end of the screw passes through the nut and abuts against the outer side of the movable stopper, the handle is connected to the end of the screw away from the movable stopper, and the screw can be driven to slide along the supporting cross rib by rotating the screw with the handle; the supporting cross rib is made of square steel pipe, and the cross section of the collar corresponds to the cross section of the supporting cross rib; the movable stopper and the fixed stopper are both made of angle steel, the fixed stopper is connected to the supporting cross rib by welding, and the nut is connected to the supporting cross rib by welding; the movable stopper is connected to the collar by welding.

[0012] A further technical solution of the present invention is that the support frame is an integral bracket constructed by scaffolding steel pipes of any type, including fastener type, bowl buckle type, disc buckle type, wheel buckle type, and keyway type.

[0013] A further technical solution of the present invention is that the outer dimensions of the rear-dismantling pad are larger than the outer dimensions of the top plate of the early-dismantling top support.

[0014] Another technical solution of the present invention is: a construction method of a pre-support and then-installation early-dismantling formwork system, comprising the following steps:

[0015] S1. Set up the support frame, connect the slab bottom rear-removed support poles, slab bottom early-removed support poles, beam bottom rear-removed support poles, and beam bottom early-removed support poles through connecting cross bars to form a stable overall support;

[0016] S2, install the common top support and the early removal top support, insert and position the common top support and the early removal top support at the upper end of the corresponding support vertical rod, and adjust the top plate height of the early removal top support so that the top plate height of the early removal top support at the upper end of the rear removal support vertical rod of the board bottom is consistent, and the top plate height of the early removal top support at the upper end of the rear removal support vertical rod of the beam bottom is consistent;

[0017] S3, installing the beam bottom support beam and the slab bottom support beam, placing and positioning the beam bottom support beam and the slab bottom support beam on the corresponding support plates of the common top support and the early removal support of the early removal top support, and adjusting the height and horizontality of the beam bottom support beam and the slab bottom support beam through the adjusting nuts on the common top support and the second early removal adjusting nuts on the early removal top support;

[0018] S4, installing the beam bottom support device, and positioning a plurality of beam bottom support devices evenly spaced on the beam bottom support beam;

[0019] S5, installing the beam bottom formwork and the beam side formwork, installing the beam bottom formwork on the beam bottom support device, installing the beam side formwork on both sides of the beam bottom formwork respectively, and clamping and positioning the lower side of the beam side formwork on both sides of the beam bottom formwork through the beam bottom support device;

[0020] S6. Lay the floor slab formwork, and position the shaped formwork on the bottom support beam in a straight line, and the gap of the pad formed by the shaped formwork should correspond to the position of the early dismantled top support;

[0021] S7, install the rear removal pads, and position the rear removal pads on the top plates of the early removal top supports, and the rear removal pads are located in the pad gaps formed by the shaping templates and are flush with the upper end surface of the floor slab templates;

[0022] S8. Pour concrete on the floor slab formwork and beam bottom formwork;

[0023] S9, after the concrete strength reaches 50% of the design strength, remove the common top support, the slab bottom support beam, the beam bottom support beam, the floor slab formwork, the beam bottom support device, the beam side formwork, the slab bottom early removal support vertical rod, the beam bottom early removal support vertical rod and the corresponding connecting cross bar, and remove the corresponding beam bottom support beam and slab bottom support beam by rotating the adjusting nut of the common top support and the second early removal adjusting nut of the early removal top support, thereby removing the beam bottom support device, the beam side formwork and the floor slab formwork, and then remove the slab bottom early removal support vertical rod, the beam bottom early removal support vertical rod and the corresponding connecting cross bar;

[0024] S10. After the concrete strength reaches the strength that allows for complete formwork removal, remove the early-removal top support, the rear-removal pad, the beam bottom formwork, the slab bottom rear-removal support vertical bars, the beam bottom rear-removal support vertical bars, and the corresponding connecting cross bars. By rotating the first early-removal adjustment nut of the early-removal top support, the early-removal top support releases the support for the rear-removal pad and the beam bottom formwork, thereby removing the rear-removal pad and the beam bottom formwork, and then removing the slab bottom rear-removal support vertical bars, the beam bottom rear-removal support vertical bars, and the corresponding connecting cross bars.

[0025] A further technical solution of the present invention is: in step S1, the spacing between the rear-dismantled support uprights at the bottom of the slab is determined by the force calculation of the floor slab support system, and the early-dismantled support uprights at the bottom of the slab are arranged between the rear-dismantled support uprights at the bottom of the slab and the beam, or between the rear-dismantled support uprights at the bottom of the slab and the wall column; the rear-dismantled support uprights at the bottom of the beam are evenly arranged along the center line of the bottom of the beam in the middle of the beam span, and the spacing between the rear-dismantled support uprights at the bottom of the beam is determined by the force calculation of the beam support system, and the spacing between the rear-dismantled support uprights at the bottom of the beam is the same as the spacing between the rear-dismantled support uprights at the bottom of the slab, or is an integer fraction of the spacing between the rear-dismantled support uprights at the bottom of the slab; the early-dismantled support uprights at the bottom of the beam are arranged between the rear-dismantled support uprights at the bottom of the beam and the wall, or between the rear-dismantled support uprights at the bottom of the beam and the column; and adjacent support uprights are connected by connecting cross bars of any type among fastener type, bowl buckle type, disc buckle type, wheel buckle type, and keyway type to form a stable integral bracket.

[0026] A further technical solution of the present invention is: in steps S4 and S5, the operations of installing the beam bottom support device, the beam bottom formwork and the beam side formwork are as follows: a number of beam bottom support devices are evenly spaced on the beam bottom crossbeam, the beam bottom formwork is placed on the supporting cross ribs between the movable stopper and the fixed stopper, the lower ends of the two beam side formworks are respectively vertically connected to the two sides of the beam bottom formwork, and the screw is turned by the handle, and the screw drives the movable stopper and the ring to slide along the supporting cross ribs toward the fixed stopper, thereby clamping the lower side of the beam side formwork on both sides of the beam bottom formwork.

[0027] The present invention adopts the above-mentioned technical scheme to provide a pre-supported and then assembled fixed-shape early-dismantling formwork system, which has the following beneficial effects:

[0028] 1. The support frame of the present invention is an integral support made of any type of scaffolding steel pipe commonly used in the market, such as fastener type, bowl buckle type, disc buckle type, wheel buckle type, keyway type, etc. It not only has the bearing capacity of bearing formwork, concrete and construction load, but also has the stability to ensure the stability of the entire formwork system. Compared with the single-rod support, it greatly reduces the strength and rigidity requirements of the formwork, thereby greatly reducing the weight and processing difficulty of the formwork, and greatly reducing the cost of the formwork system; in addition, since the formwork is simple to process, some non-standard size formwork components can be easily processed on site according to the actual size, which can greatly improve the adaptability of the formwork and make it have a wider range of applications;

[0029] 2. The present invention adopts a construction method of supporting first and installing later, leaving a gap larger than the top plate of the early dismantled top support on the floor template, and finally plugging the gap with a later dismantled pad, so that a certain deviation can be allowed between the position of the later dismantled support uprights and the size of the floor template, thereby solving the problem that the fixed template is difficult to adapt to the overall support system;

[0030] 3. The present invention retains the beam bottom formwork for later dismantling, and the beam side formwork, floor slab formwork, beam bottom support beam, and slab bottom support beam are all dismantled early, thus well integrating the beam formwork and floor slab formwork into a set of technically perfect early dismantling system;

[0031] 4. The beam bottom support device combines the beam bottom support beam and the beam side formwork bottom support into one, and designs the beam bottom support into a tooled structure. It has the advantages of reliable reinforcement, convenient and fast construction, multiple turnover and large material saving. It is suitable for early demolding system, has a wide range of applications and has high promotion value.

[0032] The following is a further description of the support-first-install-later-fixed-shape early-dismantle formwork system and its construction method of the present invention in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a bottom view of a pre-support and post-installation finalized early dismantling formwork system of the present invention (top support omitted);

[0034] Figure 2 It is a front view of the present invention;

[0035] Figure 3 is a side view of the present invention;

[0036] Figure 4 It is a bottom view of the early-dismantling formwork system of the present invention after the early-dismantling components are removed;

[0037] Figure 5 It is a front view of the present invention after removing the early dismantling parts;

[0038] Figure 6 is a side view of the present invention after removing the early dismantling parts;

[0039] Figure 7 It is a structural diagram of the finalized template;

[0040] Figure 8 It is a schematic diagram of the structure of the rear removal pad;

[0041] Fig. 9 This is the front view of the top support removed early;

[0042] Fig.10 This is a side view of the top support removed early;

[0043] Fig.11 This is the main view of a normal top support;

[0044] Fig.12 It is a side view of a normal top support;

[0045] Fig.13 It is the front view of the beam bottom support device;

[0046] Fig.14 It is a top view of the beam bottom support device;

[0047] Fig.15 is a side view of the beam bottom support device;

[0048] Fig.16 It is a structural schematic diagram of the beam side formwork and the beam bottom formwork being positioned on the beam bottom through the beam bottom support device and the beam bottom support beam and then removed from the support uprights;

[0049] Explanation of the numbers in the attached figures: 1-rear dismantling support poles at the bottom of the beam, 2-early dismantling top support, 21-early dismantling top support screw rod, 22-first early dismantling adjustment nut, 23-second early dismantling adjustment nut, 24-early dismantling support, 25-top plate, 3-beam bottom support beam, 4-beam bottom support device, 401-handle, 402-nut, 403-screw, 404-movable stopper, 405-support cross brace, 406-fixed stopper, 407-ring, 5-beam side formwork, 6-beam bottom formwork, 7-floor formwork, 71-shaped formwork, 711-triangular notch, 72-pad notch, 8-slab bottom support beam, 9-rear-removal pad, 10-slab bottom rear-removal support upright, 11-ordinary top support, 1101-ordinary top support screw, 1102-adjusting nut, 1103-support plate, 12-slab bottom early-removal support upright, 13-connecting cross bar, 14-beam bottom early-removal support upright. DETAILED DESCRIPTION

[0050] like Figures 1 to 16 As shown, the present invention provides a support-first, installation-later, finalized, and early-dismantling formwork system, comprising a support system and a formwork system.

[0051] The support system of the present invention includes a support frame, a top support, a support beam and a bottom support device 4 of the beam; the support frame is an integral support formed by scaffolding steel pipes of any type of fastener type, bowl buckle type, disc buckle type, wheel buckle type and keyway type, which not only has the bearing capacity of bearing formwork, concrete and construction load, but also has the stability to ensure the stability of the entire formwork system. In this embodiment, the support frame includes a slab bottom rear dismantling support upright 10, a slab bottom early dismantling support upright 12, a beam bottom rear dismantling support upright 1, a beam bottom early dismantling support upright 14 and a connecting cross bar 13; the top support includes an early dismantling top support 2 and a general The through top support 11, the early-removal top support 2 is respectively positioned on the upper ends of the post-removal support uprights 10 at the bottom of the slab and the post-removal support uprights 1 at the bottom of the beam, and the common top support 11 is respectively positioned on the upper ends of the early-removal support uprights 12 at the bottom of the slab and the early-removal support uprights 14 at the bottom of the beam; the support beams include a slab bottom support beam 8 and a beam bottom support beam 3, the slab bottom support beam 8 and the beam bottom support beam 3 are respectively located on the early-removal top support 2 and the common top support 11 at the corresponding slab bottom and beam bottom positions; the beam bottom support device 4 is spaced apart on the beam bottom support beam 3, the slab bottom support beam 8 and the beam bottom support beam 3 have the bearing capacity to bear the formwork, concrete and construction load.

[0052] The formwork system of the present invention comprises a floor formwork 7, a rear dismantling pad 9, a beam side formwork 5 and a beam bottom formwork 6. The floor formwork 7 is located on a bottom support beam 8. Figures 5 to 7 As shown, the floor slab formwork 7 is formed by linear splicing of multiple fixed formworks 71, and a triangular notch 711 is provided at the corner of the fixed formwork 71 at the position corresponding to the rear dismantling support upright 10 at the bottom of the board. The triangular notches 711 of the four adjacent fixed formworks 71 enclose a pad notch 72 that is consistent with the outer contour of the rear dismantling pad 9, and the rear dismantling pad 9 is positioned in the pad notch 72 enclosed by the fixed formwork 71. The beam bottom formwork 6 is located on the upper side of the beam bottom support device 4, and the beam side formworks 5 are respectively located on both sides of the beam bottom formwork 6, and the lower ends of the beam side formworks 5 are respectively vertically connected to the two side edges of the beam bottom formwork 6, and the upper ends of the beam side formworks 5 are respectively spliced ​​with the side inner corners corresponding to the floor slab formwork 7.

[0053] During construction, the slab bottom rear-dismantled support uprights 10 are evenly spaced along the middle of the floor slab formwork 7, and the spacing between the slab bottom rear-dismantled support uprights 10 is determined by the force calculation of the floor slab support system; the slab bottom early-dismantled support uprights 12 are arranged between the slab bottom rear-dismantled support uprights 10 and the beam, or between the slab bottom rear-dismantled support uprights 10 and the wall column; the beam bottom rear-dismantled support uprights 1 are evenly arranged along the beam bottom center line in the beam span, and the spacing between the beam bottom rear-dismantled support uprights 1 is determined by the force calculation of the beam support system; of course, the spacing between the beam bottom rear-dismantled support uprights 1 can also be set to be the same as the spacing between the slab bottom rear-dismantled support uprights 10, or to be an integer fraction of the spacing between the slab bottom rear-dismantled support uprights 10; the beam bottom early-dismantled support uprights 14 are arranged between the beam bottom rear-dismantled support uprights 1 and the wall, or between the beam bottom rear-dismantled support uprights 1 and the column, and adjacent support uprights are connected by connecting cross bars 13 to form a stable integral bracket.

[0054] In addition, the length of the floor slab formwork 7 perpendicular to the direction of the bottom support beam 8 is consistent with the spacing of the bottom support uprights 10 in the corresponding direction, or the distance from the outermost bottom support upright 10 to the beam edge (or wall edge) in the corresponding direction; the width of a fixed formwork of the floor slab formwork 7 parallel to the direction of the bottom support beam 8 or the width of multiple fixed formworks after splicing is consistent with the spacing of the bottom support uprights 10 in the corresponding direction, or the distance from the outermost bottom support upright 10 to the beam edge (or wall edge); and at the position of each bottom support upright 10, a corner of four fixed formworks intersects to form a pad gap 72.

[0055] like Fig. 9 , Fig.10As shown, the early-removal jacking support 2 includes an early-removal jacking support screw rod 21, a top plate 25, an early-removal support 24, a first early-removal adjustment nut 22 and a second early-removal adjustment nut 23. The top plate 25 is arranged on the top of the early-removal jacking support screw rod 21 and is connected to the early-removal jacking support screw rod 21 by welding; in this embodiment, the outer dimensions of the rear-removal pad 9 are larger than the outer dimensions of the top plate 25 of the early-removal jacking support 2, and a construction method of supporting first and then installing is adopted. The support system is first set up, the floor formwork 7 is installed, and finally the pad gap 72 on the floor formwork 7 is blocked with the rear-removal pad 9. In this way, a certain deviation can be allowed between the position of the first-supported support pole and the size of the floor formwork 9, thereby solving the problem that the shaped formwork is difficult to adapt to Problems with the support-before-installation construction method; the early-removal support 24 is movably sleeved on the outside of the early-removal top support screw rod 21, and the first early-removal adjusting nut 22 and the second early-removal adjusting nut 23 are respectively threadedly matched with the early-removal top support screw rod 21 and are located below the early-removal support 24, and the lower ends of the early-removal top support screw rod 21 are respectively positioned at the corresponding upper ends of the rear-removal support uprights 10 at the bottom of the plate and the rear-removal support uprights 1 at the bottom of the beam, and the first early-removal adjusting nut 22 is against the upper ends of the corresponding rear-removal support uprights, and the second early-removal adjusting nut 23 is against the lower side of the early-removal support 24, the height of the top plate 25 can be adjusted by rotating the first early-removal adjusting nut 22, and the height of the early-removal support 24 can be adjusted by rotating the second early-removal adjusting nut 23.

[0056] like Fig.11 , Fig.12 As shown, the ordinary top support 11 includes an ordinary top support screw rod 1101, a support plate 1103 and an adjusting nut 1102. The support plate 1103 is arranged on the top of the ordinary top support screw rod 1101 and is connected to the ordinary top support screw rod 1101 by welding. The adjusting nut 1102 is threadedly matched with the ordinary top support screw rod 1101. The lower end of the ordinary top support screw rod 1101 is respectively positioned at the corresponding upper ends of the early-dismantling support uprights 12 at the bottom of the plate and the early-dismantling support uprights 14 at the bottom of the beam, and the adjusting nut 1102 is against the upper ends of the corresponding early-dismantling support uprights. The height of the support plate 1103 can be adjusted by rotating the adjusting nut 1102.

[0057] like Figures 13 to 15As shown, the beam bottom support device 4 includes a supporting cross rib 405, a handle 401, a nut 402, a screw 403, a collar 407, a movable stopper 404 and a fixed stopper 406. The supporting cross rib 405 is made of square steel pipes, the cross section of the collar 407 corresponds to the cross section of the supporting cross rib 405, and the collar 407 can just be inserted into the supporting cross rib 405. The movable stopper 404 and the fixed stopper 406 are both made of angle steel. The nut 402 and the fixed stopper 406 are respectively connected to the two ends of the supporting cross rib 405, and the ring 407 is sleeved on the outer side of the supporting cross rib 405 between the nut 402 and the fixed stopper 406, and the ring 407 can slide along the supporting cross rib 405; the movable stopper 404 is connected to the ring 407 by welding, the screw 403 passes through the nut 402 and is threadedly matched with the nut 402, and one end of the screw 403 passes through the nut 402 and abuts against the outer side of the movable stopper 404, and the handle 401 is connected to the end of the screw 403 away from the movable stopper 404, and the screw 403 is rotated by the handle 401 to drive the movable stopper 404 and the ring 407 to slide along the supporting cross rib 405.

[0058] In addition, the present invention also provides a construction method of a pre-support and then-installation early-dismantling formwork system, comprising the following steps:

[0059] S1, erecting a support frame, connecting the slab bottom rear-removed support pole 10, the slab bottom early-removed support pole 12, the beam bottom rear-removed support pole 1, and the beam bottom early-removed support pole 14 through the connecting crossbar 13 to form a stable integral support;

[0060] S2, install the common top support 11 and the early removal top support 2, insert and position the common top support 11 and the early removal top support 2 at the upper ends of the corresponding support uprights, and adjust the height of the top plate 25 of the early removal top support 2 so that the top plate 25 of the early removal top support 2 at the upper end of the rear removal support upright 10 of the board bottom is consistent in height, and the top plate 25 of the early removal top support 2 at the upper end of the rear removal support upright 1 of the beam bottom is consistent in height;

[0061] S3, install the beam bottom support beam 3 and the board bottom support beam 8, place the beam bottom support beam 3 and the board bottom support beam 8 on the corresponding support plate 1103 of the common top support 11 and the early removal support 24 of the early removal top support 2, and adjust the height and horizontality of the beam bottom support beam 3 and the board bottom support beam 8 through the adjusting nut 1102 on the common top support 11 and the second early removal adjusting nut 23 of the early removal top support 2;

[0062] S4, installing the beam bottom support device 4, positioning a plurality of beam bottom support devices 4 evenly spaced on the beam bottom support beam 3;

[0063] S5, installing the beam bottom formwork 6 and the beam side formwork 5, installing the beam bottom formwork 6 on the beam bottom support device 4, installing the beam side formwork 5 on both sides of the beam bottom formwork 6, and clamping and positioning the lower side of the beam side formwork 5 on both sides of the beam bottom formwork 6 through the beam bottom support device 4;

[0064] S6, laying the floor slab formwork 7, and positioning the shaped formwork 71 on the bottom support beam 8 in a straight line, and the pad gap 72 formed by the shaped formwork 71 corresponds to the position of the early dismantled top support 2;

[0065] S7, install the rear dismantling pad 9, and position the rear dismantling pad 9 on the top plate 25 of the early dismantling top support 2, and the rear dismantling pad 9 is located in the pad notch 72 formed by the shaping template 71 and is flush with the upper end surface of the floor template 7;

[0066] S8, pouring concrete on the floor slab formwork 7 and the beam bottom formwork 6;

[0067] S9, after the concrete strength reaches 50% of the design strength (i.e., 3-4 days after pouring concrete), remove the common top support 11, the slab bottom support beam 8, the beam bottom support beam 3, the floor slab formwork 7, the beam bottom support device 4, the beam side formwork 5, the slab bottom early removal support vertical rod 12, the beam bottom early removal support vertical rod 14 and the corresponding connecting cross bar 13, and remove the corresponding beam bottom support beam 3 and the slab bottom support beam 8 by rotating the adjusting nut 1102 of the common top support 11 and the second early removal adjusting nut 23 of the early removal top support 2, so as to remove the beam bottom support device 4, the beam side formwork 5 and the floor slab formwork 7, and then remove the slab bottom early removal support vertical rod 12, the beam bottom early removal support vertical rod 14 and the corresponding connecting cross bar 13;

[0068] S10. After the concrete strength reaches the strength that allows complete formwork removal, remove the early-removal top support 2, the rear-removal pad 9, the beam bottom formwork 6, the slab bottom rear-removal support uprights 10, the beam bottom rear-removal support uprights 1 and the corresponding connecting crossbars 13. By rotating the first early-removal adjusting nut 22 of the early-removal top support 2, the early-removal top support 2 releases its support for the rear-removal pad 9 and the beam bottom formwork 6, thereby removing the rear-removal pad 9 and the beam bottom formwork 6, and then removing the slab bottom rear-removal support uprights 10, the beam bottom rear-removal support uprights 1 and the corresponding connecting crossbars 13.

[0069] In step S1, the spacing between the post-dismantling support uprights 10 at the bottom of the slab is determined by the force calculation of the floor support system, and the early-dismantling support uprights 12 at the bottom of the slab are arranged between the post-dismantling support uprights 10 at the bottom of the slab and the beam, or between the post-dismantling support uprights 10 at the bottom of the slab and the wall column; the post-dismantling support uprights 1 at the bottom of the beam are evenly arranged along the center line of the bottom of the beam in the middle of the beam span, and the spacing between the post-dismantling support uprights 1 at the bottom of the beam is determined by the force calculation of the beam support system, and the spacing between the post-dismantling support uprights 1 at the bottom of the beam is the same as the spacing between the post-dismantling support uprights 10 at the bottom of the slab, or is an integer fraction of the spacing between the post-dismantling support uprights 10 at the bottom of the slab; the early-dismantling support uprights 14 at the bottom of the beam are arranged between the post-dismantling support uprights 1 at the bottom of the beam and the wall, or between the post-dismantling support uprights 1 at the bottom of the beam and the column; and adjacent support uprights are connected by connecting cross bars 13 by any one of the fastener type, bowl buckle type, disk buckle type, wheel buckle type, and keyway type to form a stable integral bracket.

[0070] like Figure 1 , Figure 4 As shown, after the concrete pouring is completed, the beams or wall columns can support the floor slab, so the supporting uprights near the beams or wall columns can be designed as early-removal structures. After the concrete strength reaches 50% of the design strength, the floor slab near the beams or wall columns does not need to be supported, and only the middle part of the floor slab needs to be supported; in addition, the support of the lower part of the beam is based on the same principle.

[0071] In steps S4 and S5, the operations of installing the beam bottom support device 4, the beam bottom formwork 6 and the beam side formwork 5 are as follows: a number of beam bottom support devices 4 are evenly spaced on the beam bottom support beam 3, the beam bottom formwork 6 is placed on the supporting cross rib 405 between the movable stopper 404 and the fixed stopper 406, the lower ends of the two beam side formworks 5 are respectively vertically connected to the two sides of the beam bottom formwork 6, and the screw rod 403 is rotated by the handle 401, and the screw rod 403 drives the movable stopper 404 and the ring 407 to slide along the supporting cross rib 405 toward the fixed stopper 406, thereby clamping the lower side of the beam side formwork 5 on both sides of the beam bottom formwork 6.

[0072] It is worth mentioning that the common jacking support of the present invention is a prior art, and leveling and disassembling of the support beam by using the common jacking support is also a prior art, which will not be elaborated in detail in this embodiment.

[0073] The above embodiments are only preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, 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 pre-support and post-installation finalized early dismantling formwork system, comprising a support system and a formwork system; characterized in that: The support system comprises a support frame, a top support, a support beam and a bottom support device (4); the support frame is an integral support constructed of scaffolding steel pipes, comprising a slab bottom rear-removal support upright (10), a slab bottom early-removal support upright (12), a beam bottom rear-removal support upright (1), a beam bottom early-removal support upright (14) and a connecting crossbar (13); the top support comprises an early-removal top support (2) and a common top support (11), the early-removal top support (2) being positioned on the bottom slab rear-removal support upright (10) and the bottom slab early-removal support upright (14) and the connecting crossbar (13); ) and the upper end of the beam bottom post-removal support upright (1), the common top support (11) is respectively positioned on the upper end of the slab bottom early-removal support upright (12) and the upper end of the beam bottom early-removal support upright (14); the support beam comprises a slab bottom support beam (8) and a beam bottom support beam (3), the slab bottom support beam (8) and the beam bottom support beam (3) are respectively located on the early-removal top support (2) and the common top support (11) at the corresponding slab bottom and beam bottom positions; the beam bottom support device (4) is arranged at intervals on the beam bottom support beam (3); The formwork system comprises a floor formwork (7), a rear-dismantling pad (9), a beam side formwork (5) and a beam bottom formwork (6); the floor formwork (7) is located on a slab bottom support beam (8); the floor formwork (7) is formed by a plurality of fixed formworks (71) connected in a straight line; a triangular notch (711) is provided at a corner of the fixed formwork (71) at a position corresponding to a rear-dismantling support upright (10) at the bottom of the slab; the triangular notches (711) of four adjacent fixed formworks (71) are combined to form a pad notch (72) having the same outer contour as the rear-dismantling pad (9); the rear-dismantling pad (9) is positioned in the pad notch (72) formed by the fixed formwork (71); The beam bottom template (6) is located on the upper side of the beam bottom support device (4), the beam side templates (5) are respectively located on both sides of the beam bottom template (6), and the lower ends of the beam side templates (5) are respectively vertically connected to the two side edges of the beam bottom template (6), and the upper ends of the beam side templates (5) are respectively spliced ​​with the side inner corners corresponding to the floor template (7); The slab bottom post-removal support rods (10) are evenly arranged along the middle of the floor slab formwork (7); the slab bottom early-removal support rods (12) are arranged between the slab bottom post-removal support rods (10) and the beam, or between the slab bottom post-removal support rods (10) and the wall column; the beam bottom post-removal support rods (1) are evenly arranged along the beam bottom center line in the middle of the beam span; the beam bottom early-removal support rods (14) are arranged between the beam bottom post-removal support rods (1) and the wall, or between the beam bottom post-removal support rods (1) and the column; adjacent support rods are connected by connecting crossbars (13) to form a stable integral bracket; The beam bottom support device (4) comprises a supporting cross rib (405), a handle (401), a nut (402), a screw (403), a collar (407), a movable stopper (404) and a fixed stopper (406), wherein the nut (402) and the fixed stopper (406) are respectively connected to two ends of the supporting cross rib (405), the collar (407) is sleeved on the outer side of the supporting cross rib (405) between the nut (402) and the fixed stopper (406), and the collar (407) can slide along the supporting cross rib (405); the movable stopper (404) is connected to the collar (407), the screw (403) passes through the nut (402) and is threadedly matched with the nut (402), and one end of the screw (403) passes through the nut (402) and abuts against the movable stopper (404). On the outer side of the movable stopper (404), a handle (401) is connected to an end of the screw rod (403) away from the movable stopper (404), and the screw rod (403) can be rotated by the handle (401) to drive the movable stopper (404) and the collar (407) to slide along the supporting cross rib (405); the supporting cross rib (405) is made of square steel pipe, and the cross section of the collar (407) corresponds to the cross section of the supporting cross rib (405); the movable stopper (404) and the fixed stopper (406) are both made of angle steel, the fixed stopper (406) is connected to the supporting cross rib (405) by welding, and the nut (402) is connected to the supporting cross rib (405) by welding; the movable stopper (404) and the collar (407) are connected by welding.

2. The early-dismantling formwork system of supporting first and then installing is characterized by: The early-removal support (2) comprises an early-removal support screw rod (21), a top plate (25), an early-removal support (24), a first early-removal adjustment nut (22) and a second early-removal adjustment nut (23); the top plate (25) is arranged on the top of the early-removal support screw rod (21) and is connected to the early-removal support screw rod (21) by welding; the early-removal support (24) is movably sleeved on the outside of the early-removal support screw rod (21); the first early-removal adjustment nut (22) and the second early-removal adjustment nut (23) are respectively threadedly matched with the early-removal support screw rod (21) and are positioned Below the early removal support (24), the lower ends of the early removal top support screw rod (21) are respectively positioned at the corresponding upper ends of the rear removal support uprights (10) at the bottom of the plate and the rear removal support uprights (1) at the bottom of the beam, and the first early removal adjustment nut (22) abuts against the upper ends of the corresponding rear removal support uprights, and the second early removal adjustment nut (23) abuts against the lower side of the early removal support (24). The height of the top plate (25) can be adjusted by rotating the first early removal adjustment nut (22), and the height of the early removal support (24) can be adjusted by rotating the second early removal adjustment nut (23).

3. The formwork system of supporting first and then installing and shaping and early dismantling as claimed in claim 2 is characterized by: The outer dimensions of the rear-dismantling pad (9) are greater than the outer dimensions of the top plate (25) of the early-dismantling top support (2).

4. The formwork system of supporting first and then installing and shaping and early dismantling as claimed in claim 1 is characterized by: The common top support (11) comprises a common top support screw rod (1101), a support plate (1103) and an adjusting nut (1102); the support plate (1103) is arranged on the top of the common top support screw rod (1101) and is connected to the common top support screw rod (1101) by welding; the adjusting nut (1102) is threadedly matched with the common top support screw rod (1101); the lower end of the common top support screw rod (1101) is respectively positioned at the upper ends of the corresponding early-dismantling support uprights (12) at the bottom of the board and the early-dismantling support uprights (14) at the bottom of the beam, and the adjusting nut (1102) is against the upper ends of the corresponding early-dismantling support uprights; the height of the support plate (1103) can be adjusted by rotating the adjusting nut (1102).

5. The early-dismantling formwork system of supporting first and then installing is characterized by: The support frame is an integral support formed by constructing any type of scaffolding steel pipes, such as fastener type, bowl buckle type, disk buckle type, wheel buckle type and keyway type.

6. A construction method for a pre-support and then-installation early-dismantling formwork system as claimed in any one of claims 1 to 5, characterized in that: The steps include: S1, erecting a support frame, connecting the slab bottom rear-removable support uprights (10), the slab bottom early-removable support uprights (12), the beam bottom rear-removable support uprights (1), and the beam bottom early-removable support uprights (14) through connecting cross bars (13) to form a stable integral support; S2, installing the common top support (11) and the early removal top support (2), inserting and positioning the common top support (11) and the early removal top support (2) at the upper ends of the corresponding support uprights, and adjusting the height of the top plate (25) of the early removal top support (2) so that the top plate (25) of the early removal top support (2) at the upper end of the rear removal support upright (10) at the bottom of the board is consistent in height, and the top plate (25) of the early removal top support (2) at the upper end of the rear removal support upright (1) at the bottom of the beam is consistent in height; S3, installing the beam bottom support beam (3) and the slab bottom support beam (8), placing and positioning the beam bottom support beam (3) and the slab bottom support beam (8) on the corresponding support plate (1103) of the common top support (11) and the early removal support (24) of the early removal top support (2), and adjusting the height and horizontality of the beam bottom support beam (3) and the slab bottom support beam (8) by means of the adjusting nut (1102) on the common top support (11) and the second early removal adjusting nut (23) of the early removal top support (2); S4, installing the beam bottom support device (4), positioning a plurality of beam bottom support devices (4) on the beam bottom support beam (3) at even intervals; S5, installing the beam bottom template (6) and the beam side template (5), installing the beam bottom template (6) on the beam bottom support device (4), installing the beam side template (5) on both sides of the beam bottom template (6), and clamping the lower side of the beam side template (5) on both sides of the beam bottom template (6) through the beam bottom support device (4); S6, laying the floor slab formwork (7), and linearly splicing and positioning the shaped formwork (71) on the slab bottom support beam (8), and the pad gap (72) formed by the shaped formwork (71) corresponds to the position of the early dismantled top support (2); S7, installing the rear removal pad (9), positioning the rear removal pad (9) on the top plate (25) of the early removal top support (2), and the rear removal pad (9) is located in the pad notch (72) formed by the shaping template (71) and is flush with the upper end surface of the floor template (7); S8, pouring concrete on the floor slab formwork (7) and the beam bottom formwork (6); S9, after the concrete strength reaches 50% of the design strength, remove the common top support (11), the slab bottom support beam (8), the beam bottom support beam (3), the floor slab formwork (7), the beam bottom support device (4), the beam side formwork (5), the slab bottom early removal support vertical rod (12), the beam bottom early removal support vertical rod (14) and the corresponding connecting cross bar (13), and remove the corresponding beam bottom support beam (3) and the slab bottom support beam (8) by rotating the adjustment nut (1102) of the common top support (11) and the second early removal adjustment nut (23) of the early removal top support (2), thereby removing the beam bottom support device (4), the beam side formwork (5) and the floor slab formwork (7), and then remove the slab bottom early removal support vertical rod (12), the beam bottom early removal support vertical rod (14) and the corresponding connecting cross bar (13); S10, after the concrete strength reaches the strength that allows for complete formwork removal, the early-removal top support (2), the rear-removal pad (9), the beam bottom formwork (6), the slab bottom rear-removal support vertical rod (10), the beam bottom rear-removal support vertical rod (1) and the corresponding connecting cross bar (13) are removed, and the first early-removal adjustment nut (22) of the early-removal top support (2) is rotated so that the early-removal top support (2) releases the support for the rear-removal pad (9) and the beam bottom formwork (6), thereby removing the rear-removal pad (9) and the beam bottom formwork (6), and then removing the slab bottom rear-removal support vertical rod (10), the beam bottom rear-removal support vertical rod (1) and the corresponding connecting cross bar (13).

7. A construction method for a pre-support and then pre-install early-dismantle formwork system as claimed in claim 6, characterized in that: In step S1, the spacing between the slab bottom post-removal support uprights (10) is determined by the force calculation of the floor slab support system, and the slab bottom post-removal support uprights (12) are arranged between the slab bottom post-removal support uprights (10) and the beam, or between the slab bottom post-removal support uprights (10) and the wall column; the beam bottom post-removal support uprights (1) are evenly arranged along the beam bottom center line in the middle of the beam span, and the spacing between the beam bottom post-removal support uprights (1) is determined by the force calculation of the beam support system, and the beam bottom post-removal support uprights (1) are arranged between the beam bottom post-removal support uprights (1) and the wall column. The spacing between them is the same as the spacing between the rear-dismantled support uprights (10) at the bottom of the slab, or is an integer multiple of the spacing between the rear-dismantled support uprights (10) at the bottom of the slab; the beam bottom early-dismantled support uprights (14) are arranged between the rear-dismantled support uprights (1) at the bottom of the beam and the wall, or between the rear-dismantled support uprights (1) at the bottom of the beam and the column; and adjacent support uprights are connected by connecting cross bars (13) of any type among fastener type, bowl buckle type, disk buckle type, wheel buckle type, and key groove type to form a stable integral bracket.

8. The construction method of the pre-support and post-installation early-dismantling formwork system as claimed in claim 6, characterized in that: In steps S4 and S5, the operation of installing the beam bottom support device (4), the beam bottom template (6) and the beam side template (5) is as follows: a plurality of beam bottom support devices (4) are evenly spaced and placed on the beam bottom support beam (3); the beam bottom template (6) is placed on the supporting cross rib (405) between the movable stopper (404) and the fixed stopper (406); the lower ends of the two beam side templates (5) are respectively vertically connected to the two sides of the beam bottom template (6); the screw rod (403) is rotated by the handle (401), and the screw rod (403) drives the movable stopper (404) and the collar (407) to slide along the supporting cross rib (405) toward the fixed stopper (406), thereby clamping the lower side of the beam side template (5) on both sides of the beam bottom template (6).

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