A bottom formwork support system for roof slabs with beams

Abstract

The present invention discloses a support system for a roof slab bottom formwork containing beams, including a roof slab bottom formwork support part and a beam bottom support part. The roof slab bottom formwork support part is composed of a main beam, a secondary beam and an adjustable support column to form a beam support structure, and the beam bottom support part has a beam bottom formwork support beam; the beam bottom formwork support beam forms a hanger structure through two screw-type hangers distributed at both ends thereof, and the beam bottom support part is also supported by the adjustable support column. The beneficial effects of the present invention are that the workload of erecting the support system is significantly reduced, the erection cost is saved, and the erection efficiency is improved; and by taking advantage of being closer to the top surface of the roof slab bottom formwork support, the convenience of height adjustment operation of the beam bottom formwork support part and the construction efficiency are effectively improved, thereby achieving the purpose of reducing construction costs from two aspects.

Description

Technical Field

[0001] The invention relates to a building construction formwork support system, in particular to a beam-containing roof slab bottom formwork support system. Background Art

[0002] The concrete floor of a building or structure, especially in the basement and non-standard floor, has a high floor height, and its beams usually have large structural dimensions and heavy weight. Therefore, during pouring, the mold cavity bottom plate needs a large support force to prevent the floor and beam from bending and deforming and to ensure the service life of the building or structure. The existing beam bottom formwork is usually supported by setting up scaffolding. Multiple layers of criss-crossed scaffolding steel pipes are set under the bottom of the beam, and fixed to the independent support columns at the bottom of the beam through scaffolding hinges to support the bottom of the plate and the beam bottom formwork. In this way, not only is the workload of erection large, but the height adjustment is also inconvenient, which seriously affects the efficiency of formwork erection. Although technicians in this field have made many improvements, the overall support method of bottom support is still adopted, and the workload of beam bottom formwork erection and the convenience of height adjustment have not been significantly improved. Therefore, further improvements are needed. Summary of the invention

[0003] The purpose of the present invention is to provide a beam-containing roof slab bottom formwork support system in view of the shortcomings of the existing beam bottom formwork support system, which has a large installation workload and inconvenient height adjustment operation. The beam bottom formwork support part of the support system is a hanger structure, which is supported by an adjustable support column of the roof slab bottom formwork support, and a height-adjustable structure is formed by a screw-type hanger. The system can avoid the installation of steel pipe scaffolding and independent support columns at the bottom of the beam to significantly reduce the installation workload, and take advantage of being closer to the top surface of the roof slab bottom formwork support to achieve height adjustment by pulling the height adjustment nut on the hanger on the roof slab bottom formwork support, and will not change the height of the independent support or increase or decrease the thickness of the floor bottom formwork pad due to changes in the floor height, which can effectively improve the convenience of height adjustment operation of the beam bottom formwork support part and the construction efficiency.

[0004] To achieve the aforementioned objectives, the present invention adopts the following technical solutions.

[0005] A roof slab bottom formwork support system containing beams comprises a roof slab bottom formwork support part and a beam bottom support part, wherein the roof slab bottom formwork support part is composed of a main beam, a secondary beam and an adjustable support column to form a beam-to-beam support structure, and the beam bottom support part has a beam bottom formwork support beam; the beam bottom formwork support beam forms a hanger structure through two screw-type hangers distributed at both ends thereof, and the beam bottom support part is also supported by the adjustable support column.

[0006] In the present invention adopting the above-mentioned technical scheme, the roof slab bottom formwork supporting part of the supporting system is a beam-to-beam supporting structure, and the beam bottom supporting part is supported by the adjustable pillars of the roof slab bottom formwork supporting part. There is no need for independent pillars of the beam bottom formwork, and there is no need to set up corresponding scaffolding, which significantly reduces the erection workload of the support system, saves erection costs, and improves erection efficiency; and taking advantage of being closer to the top surface of the roof slab bottom formwork support, the height adjustment is achieved on the roof slab bottom formwork support by pulling the height adjustment nut on the hanger, and the height of the independent pillar will not be changed or the thickness of the floor formwork pad will not be increased or decreased due to changes in the floor height, which can effectively improve the convenience of the height adjustment operation of the beam bottom formwork supporting part and the construction efficiency, thereby achieving the purpose of reducing construction costs from two aspects.

[0007] Preferably, the suspension rod is T-shaped, connected to the bottom formwork support beam through the T-shaped vertical rod section, and suspended through the T-shaped horizontal rod section. The balanced force characteristic of the T-shaped suspension rod is utilized to ensure that the vertical section of the suspension rod is always in a vertical downward state, thus providing a guarantee for the bottom formwork support beam to always be in a balanced and stable state.

[0008] Further preferably, the adjustable support comprises a support riser and an adjustable top support, the adjustable top support comprises a top support screw and a top cap, the top cap has a bearing plate for bearing the main beam, and each of the four corners of the bearing plate is provided with a limit pile, and the four limit piles are used to form a lateral sliding limit for the main beam and the secondary beam resting on the main beam, so as to form a simple and stable support system to ensure safety. Among them, the limit piles can be round rods, round tubes, angle steels, square steels, square tubes, flat steels or rectangular tubes.

[0009] More preferably, the bearing plate is rectangular, with space for arranging two main beams in the length direction and space for arranging a single secondary beam in the width direction, so that in the length direction of the main beam, adjacent profiles forming the main beam are connected to form overlapping sections arranged in parallel, so as to facilitate the erection and improve the stability of the main beam support.

[0010] Further preferably, the hanger is suspended on the main beam or the secondary beam through a T-shaped crossbar section, and the crossbar section is hidden inside the main beam or the secondary beam. Each hanger can only be hung on one member in the main beam or the secondary beam, and the hangers of the same casting beam bottom formwork are set through the same type of beam in the support system. When casting the ring beam, multiple hangers of two adjacent beam bottom forms in the ring beam need to be hung on two types of beams respectively. Among them, the main beam and the secondary beam should preferably use C-shaped light steel or rectangular tube profiles to use the internal space of the material to hide the crossbar section. When C-shaped light steel is used, the C-shaped opening can be used as the space for the hanger to pass through. Since the bottom wall of the C-shaped light steel groove bears the cross bar section, a long hole with a length less than the length of the cross bar section and a width greater than the largest diameter of the cross bar section and the vertical bar section, or a through hole that can only pass through the vertical bar section is opened on the bottom of the groove; when rectangular tube profiles are used, it is necessary to open a long hole on the side wall bearing the cross bar section, and the length of the long hole is greater than half of the sum of the length of the cross bar section and the diameter of the vertical bar section, and is less than the length of the cross bar section; or, a through hole that can only pass through the vertical bar section is opened on the side wall, and a long hole with a length greater than the length of the cross bar section and a width greater than the largest diameter of the cross bar section and the vertical bar section is opened on the opposite tube wall.

[0011] Further preferably, the adjustable pillar includes a pillar riser and an early-removal top support, the early-removal top support is arranged on the pillar riser in an adjustable height through a top support adjusting screw and a top support adjusting nut; the early-removal top support has a roof bottom formwork early-removal structure that can remove the roof bottom formwork early; the adjustable pillar is also provided with a delayed-removal component, the delayed-removal component includes a pillar delayed-removal top plate and a beam bottom formwork bearing beam connection structure for connecting the beam bottom formwork bearing beam, the beam bottom formwork bearing beam is used to hang the suspension rod, and the delayed-removal component is also provided with a base positioning sleeve for cooperating with the pillar riser; the pillar delayed-removal top plate is fixedly connected to the top of the top support adjusting screw. The support system forms an early-removal structure in which the roof slab bottom formwork support part is removed early relative to the beam bottom formwork support part through the early-removal top support, and the concrete thickness of the cast beam is much greater than that of the roof slab, and it needs to be supported for a longer time. It is consistent with the actual construction situation as a delayed-removal part. Through the early removal of the roof slab bottom formwork support part, the rapid turnover of large-area support components in the support system can be achieved, the utilization rate can be improved, and the construction cost can be reduced. Among them, the early removal of the supporting part of the bottom formwork of the roof slab is implemented by removing the main beam and the secondary beam, while the adjustable pillar still forms a point support for the bottom formwork of the roof slab by late removal of the top slab. The bearing beam of the bottom formwork of the beam should preferably be made of C-shaped light steel or rectangular tube profiles to utilize the internal space of the material to hide the crossbar segment. When C-shaped light steel is used, the C-shaped opening can be used as the space for the suspension rod to pass through. Since the bottom wall of the groove of the C-shaped light steel bears the crossbar segment, a long hole with a length less than the length of the crossbar segment and a width greater than the largest of the diameters of the crossbar segment and the vertical segment or a through hole that can only pass through the vertical segment is opened on the bottom of the groove; when a rectangular tube profile is used, a long hole needs to be opened on the side wall bearing the crossbar segment, and the length of the long hole is greater than half of the sum of the length of the crossbar segment and the diameter of the vertical segment, and less than the length of the crossbar segment; or, a through hole that can only pass through the vertical segment is opened on the side wall, and a long hole with a length greater than the length of the crossbar segment and a width greater than the largest of the diameters of the crossbar segment and the vertical segment is opened on the opposite tube wall. Among them, the base positioning sleeve is sleeved on the outer periphery of the top support adjusting screw and cooperates with the support riser, which can effectively improve the stability and firmness of the connection between the early-removed top support and the late-removed components and the support riser, which is beneficial to improving construction safety.

[0012] More preferably, the early dismantling support comprises an early dismantling sleeve movably mounted on the upper part of the support adjusting screw, the early dismantling sleeve is supported on the early dismantling nut, an early dismantling tray is welded or integrally formed on the early dismantling sleeve, and the early dismantling tray has a main beam limiting structure for limiting the sliding of the main beam. A reliable early dismantling function can be achieved through a simple structure, and the main beam state can be ensured to be stable during the erection and dismantling process through the limiting structure.

[0013] Further preferably, the main beam limiting structure includes flanges on both sides of the early removal tray and a positioning tongue located in front of the early removal tray, the positioning tongue protruding from the upper front end of the support rib, the support rib welded and fixed to the early removal sliding sleeve, and welded and fixed to the early removal tray lifted above, so as to effectively ensure that the main beam does not move vertically and horizontally and flip, and form a reliable support for the main beam.

[0014] More preferably, the delayed dismantling component includes a delayed dismantling base, a middle hole for the support adjustment screw to pass through is provided in the middle of the delayed dismantling base, the delayed dismantling base is pressed on the top of the support riser by the support adjustment nut, and a connecting ear extending upward is formed on the delayed dismantling base; the connecting ear is provided with a beam bottom mold bearing beam connection structure for connecting with the beam bottom mold bearing beam, or the connecting ear is fixedly connected with a beam bottom mold bearing beam connection component, and the beam bottom mold bearing beam connection component is provided with the beam bottom mold bearing beam connection structure; the base positioning sleeve is integrally formed or welded and fixed on the lower end surface of the delayed dismantling base. In order to utilize the adjustable pillar of the roof slab bottom mold support part, and after the roof slab bottom mold support is removed early, a stable support for the beam is formed.

[0015] It is further preferred that the beam bottom formwork bearing beam connection member is a rectangular channel steel structure, and the delayed dismantling base has two connection ears located on both sides of the rectangular channel steel, and the two side walls of the beam bottom formwork bearing beam connection member are provided with a plurality of bolt penetration holes, and the bolt penetration holes are used to respectively connect with the delayed dismantling base and the beam bottom formwork bearing beam through penetration bolts, and the number of bolt penetration holes is greater than or equal to the sum of the number of bolt penetration holes at the corresponding ends of the connection ears and the beam bottom formwork bearing beam. By selecting different combinations of bolt penetration holes and connection ears and beam bottom formwork bearing beams, a support system in which the beam bottom formwork bearing beam is at different height positions is obtained, further widening the adjustment range of the beam bottom formwork support height.

[0016] The beneficial effects of the present invention are that the workload of erecting the support system is significantly reduced, the erection cost is saved, and the erection efficiency is improved; and by taking advantage of being closer to the top surface of the bottom formwork support of the roof slab, the convenience and construction efficiency of the height adjustment operation of the bottom formwork support part of the beam are effectively improved, thereby achieving the purpose of reducing construction costs from two aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic axonometric diagram of Example 1 in the present invention.

[0018] Figure 2 It is a schematic axonometric view of the structure of the adjustable top support in Example 1 of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the suspension rod in the present invention.

[0020] Figure 4 It is a schematic diagram of the relationship between the hanger rod penetration hole and the hanger rod size when the main beam or the secondary beam in the present invention adopts rectangular pipes.

[0021] Figure 5 It is a schematic diagram of the process of installing the hanger rod when the main beam or the secondary beam in the present invention adopts rectangular pipes.

[0022] Figure 6It is a structural schematic axonometric diagram of Example 2 of the present invention.

[0023] Figure 7 It is a structural schematic axonometric diagram of the combination of the early-dismantling top support and the first structural form of the late-dismantling component in Example 2 of the present invention.

[0024] Figure 8 It is a structural schematic axonometric diagram of a combination of an early-dismantling top support and a second structural form of a late-dismantling component in Example 2 of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0026] Example 1, see Figure 1 , Figure 2 , Figure 3 A support system for a bottom formwork of a roof slab with beams, comprising a top slab bottom formwork support part and a beam bottom support part. The roof slab bottom formwork support part is composed of a main beam 1, a secondary beam 2 and an adjustable support 3 to form a beam support structure, and the beam bottom support part has a beam bottom formwork support beam 4; the beam bottom formwork support beam 4 forms a hanger structure through two screw-type hangers 5 distributed at both ends thereof, and the height of the beam bottom formwork support beam 4 is limited and adjusted by hanger nuts screwed on the hangers 5, and the beam bottom support part is also supported by the adjustable support 3, and the adjustable support 3 adopts a steel pipe support structure of a disc-type scaffolding.

[0027] The suspension rod 5 is T-shaped, connected to the bottom beam support beam 4 through the T-shaped vertical rod section 5a, and suspended through the T-shaped horizontal rod section 5b. The adjustable support 3 includes a support riser 31 and an adjustable top support 32, the adjustable top support 32 includes a top support screw 32a and a top cap, the bottom of the top support screw 32a is screwed with a top support adjustment nut 12, and the top support adjustment nut 12 is supported on the top of the support riser 31; the top cap has a bearing plate 32b for supporting the main beam 1, and a limit pile 32c is provided at each of the four corners of the bearing plate 32b, and the four limit piles 32c are used to form a lateral sliding limit for the main beam 1 and the secondary beam 2 placed on the main beam 1, wherein the limit pile 32c shown in the figure is a round rod, and can also be a round tube, angle steel, square steel, square tube, flat steel or rectangular tube and other structural shapes. The bearing plate 32b is rectangular and is structurally reinforced by a downward flange in the length direction. There is space for arranging two main beams 1 in the length direction and space for arranging a single secondary beam 2 in the width direction.

[0028] In addition, the main beam 1 and the secondary beam 2 are made of C-shaped light steel profiles and are arranged in a manner that the C-shaped groove opening faces upward. In the length direction of the main beam, the intersection of adjacent C-shaped light steel profiles constituting the main beam forms overlapping sections arranged in parallel. A part of the hanger 5 is suspended on the main beam 1 through a T-shaped cross bar section, and the other part is suspended on the secondary beam 2, and the cross bar section is hidden inside the groove of the C-shaped light steel profile corresponding to the main beam 1 or the secondary beam 2. The C-shaped opening of the C-shaped light steel profile serves as a space for the hanger to pass through. Since the bottom wall of the C-shaped light steel groove bears the cross bar section, a long strip hole with a length less than the length of the cross bar section and a width greater than the largest diameter of the cross bar section and the vertical bar section is opened on the bottom of the groove; or, a through hole that can only pass through the vertical bar section.

[0029] See also Figure 4 , Figure 5 In this embodiment, the main beam 1 and the secondary beam 2 can also be made of rectangular tubes. When the main beam 1 and the secondary beam 2 are made of rectangular tubes, a long hole is opened on the side wall of the crossbar section in the rectangular tube-bearing suspension rod 5. The length L1 of the long hole is greater than half of the sum of the length L2 of the crossbar section and the diameter d of the vertical section, that is, L1 = L2 + d / 2, and less than the length of the crossbar section, that is, L1 < L2. Of course, a through hole that can only pass through the vertical section can also be opened on the side wall, and a long hole with a length greater than the length of the crossbar section and a width greater than the largest diameter of the crossbar section and the vertical section can be opened on the opposite tube wall to provide space for the suspension rod to pass through.

[0030] In this embodiment, the supporting screw rod 32a is made of a pipe material and forms an externally threaded tubular structure.

[0031] Example 2, see Figure 6 The adjustable pillar 3 includes a pillar riser 31 and an early-removal top support, and the early-removal top support is arranged on the pillar riser 31 in a height-adjustable manner through a top support adjusting screw 7 and a top support adjusting nut 12; the early-removal top support has a roof bottom formwork early-removal structure that can remove the roof bottom formwork early; the adjustable pillar 3 is also provided with a delayed-removal component, the delayed-removal component includes a pillar delayed-removal top plate 16 and a beam bottom formwork bearing beam connection structure for connecting the beam bottom formwork bearing beam 6, the beam bottom formwork bearing beam 6 is used to suspend the hanger 5, and is made of C-shaped light steel profiles, and is arranged in a direction where the C-shaped groove opening faces upward, and the delayed-removal component is also provided with a base positioning sleeve 15 for cooperating with the pillar riser 31; the pillar delayed-removal top plate 16 is fixedly connected to the top of the top support adjusting screw 7, the pillar delayed-removal top plate 16 is rectangular, and a triangular reinforcing support plate 17 is provided between the pillar delayed-removal top plate 16 and the side wall of the top support adjusting screw 7.

[0032] The early dismantling support comprises an early dismantling sleeve 8 movably mounted on the upper part of the support adjusting screw 7, the early dismantling sleeve 8 is supported on the early dismantling nut 9, a guide groove is formed on the upper end of the early dismantling sleeve 8, and the guide groove cooperates with the triangular reinforcing support plate 17 in the thickness direction of the triangular reinforcing support plate 17 to form a restriction on the rotation of the early dismantling sleeve 8, and the early dismantling sleeve 8 is welded or integrally formed with an early dismantling tray 10 on the outside, and the early dismantling tray 10 has a main beam limiting structure for limiting the sliding of the main beam 1. The main beam limiting structure comprises flanges 10a on both sides of the early dismantling tray 10, and a positioning tongue 11a located in front of the early dismantling tray 10, the positioning tongue 11a protrudes on the upper side of the front end of the support rib 11, the support rib 11 is welded and fixed on the early dismantling sleeve 8, and is welded and fixed to the early dismantling tray 10 held above. The delayed dismantling component comprises a delayed dismantling base 13, a middle hole for the support adjusting screw 7 to pass through is provided in the middle of the delayed dismantling base 13, and the delayed dismantling base 13 is welded and fixed to the base positioning sleeve 15 as a whole. The delayed removal base 13 is pressed on the top of the support riser 31 by the top support adjusting nut 12, and a connecting ear 13a extending upward is formed on the delayed removal base 13; a beam bottom mold load-bearing beam connecting member 14 is fixedly connected to the connecting ear 13a, and the beam bottom mold load-bearing beam connecting member 14 is provided with the beam bottom mold load-bearing beam connecting structure; the beam bottom mold load-bearing beam connecting member 14 is a rectangular channel steel structure, and the delayed removal base 13 has two connecting ears 13a located on both sides of the rectangular channel steel, and multiple bolt penetration holes 14a are provided on the two side walls of the beam bottom mold load-bearing beam connecting member 14, and the bolt penetration holes 14a are used for fixedly connecting with the delayed removal base 13 and the beam bottom mold load-bearing beam 6 respectively by penetration bolts, and the number of the bolt penetration holes 14a is greater than or equal to the sum of the number of bolt penetration holes at the corresponding ends of the connecting ears 13a and the beam bottom mold load-bearing beam 6.

[0033] Among them, the early dismantling top support on the adjustable support 3 located in the middle position is combined with the late dismantling component of the first structural form to form a Figure 7 In the structure shown in FIG. 1 , the delayed dismantling base 13 is in the shape of a long strip, and connecting ears 13a are provided at both ends of the length direction of the delayed dismantling base 13 to be connected with the beam bottom mold bearing beam 6 through the beam bottom mold bearing beam connecting member 14. The early dismantling top support on the adjustable support 3 located at the beam end or the wall corner is combined with the delayed dismantling member of the second structural form to form a Figure 8 In the structure shown, the late dismantling base 13 is in the shape of a square, and connecting ears 13a are provided at the far ends of the two sides of the square of the late dismantling base 13 to be aligned with the beam bottom mold bearing beam 6 through the beam bottom mold bearing beam connecting member 14.

[0034] In this embodiment, the delayed-removal base 13 and the base positioning sleeve 15 can also be formed into an integral structure by an integral forming method such as casting, forging and stamping.

[0035] The beam bottom formwork bearing beam 6 in this embodiment can also be made of rectangular tubular material like the main beam 1 and the secondary beam 2 in embodiment 1, and when it is made of rectangular tubular material, it is combined with: Figure 4 , Figure 5 , a long hole is opened on the side wall of the cross bar section in the rectangular tube-bearing hanger 5, and the length L1 of the long hole is greater than half of the sum of the length L2 of the cross bar section and the diameter d of the vertical bar section, that is, L1 = L2 + d / 2, and less than the length of the cross bar section, that is, L1 < L2. Of course, a through hole that can only pass through the vertical bar section can also be opened on the side wall, and a long hole with a length greater than the length of the cross bar section and a width greater than the largest diameter of the cross bar section and the vertical bar section can be opened on the opposite tube wall to provide space for the hanger to pass through.

[0036] The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described again.

[0037] In embodiments 1 and 2, the beam bottom mold support beam 4 is made of C-shaped light steel profile, and its C-shaped groove opening faces downward. Obviously, the beam bottom mold support beam 4 can also be made of rectangular pipe, wooden square, bamboo square or flat steel.

[0038] In embodiments 1 and 2, the connecting ear 13a is provided with a beam bottom mold bearing beam connecting hole directly used for connecting with the beam bottom mold bearing beam 6, and the connecting hole constitutes the connecting structure to reduce intermediate connecting components and simplify the structure.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A roof slab bottom formwork support system including a roof slab bottom formwork support part and a beam bottom support part, wherein the roof slab bottom formwork support part is composed of a main beam (1), a secondary beam (2) and an adjustable support column (3) to form a beam support structure, and the beam bottom support part has a beam bottom formwork support beam (4); characterized in that: The beam bottom formwork support beam (4) forms a hanger structure through two screw-type hangers (5) distributed at both ends thereof, and the beam bottom support part is also supported by the adjustable support (3); the adjustable support (3) comprises a support riser (31) and an early-removal top support, and the early-removal top support is arranged on the support riser (31) in a height-adjustable manner through a top support adjustment screw (7) and a top support adjustment nut (12); the early-removal top support has a roof bottom formwork early-removal structure that can early-remove the roof bottom formwork; the adjustable support (3) is also provided with a delayed-removal component, which comprises a support delayed-removal top plate (16) and a beam bottom formwork bearing beam connection structure for connecting the beam bottom formwork bearing beam (6), the beam bottom formwork bearing beam (6) being used to suspend the hanger (5), and the delayed-removal component is also provided with a base positioning sleeve (15) for cooperating with the support riser (31); the support delayed-removal top plate (16) is fixedly connected to the top of the top support adjustment screw (7).

2. The bottom formwork support system for roof slabs with beams according to claim 1 is characterized in that: The suspension rod (5) is T-shaped, the suspension rod (5) is connected to the beam bottom mold support beam (4) via a T-shaped vertical rod section, and the suspension rod (5) is suspended via a T-shaped horizontal rod section.

3. The bottom formwork support system for roof slabs with beams according to claim 2 is characterized in that: The adjustable support (3) comprises a support riser (31) and an adjustable top support (32), the adjustable top support (32) comprising a top support screw (32a) and a top cap, the top cap having a bearing plate (32b) for bearing the main beam (1), a limiting pile (32c) being provided at each of the four corners of the bearing plate (32b), the four limiting piles (32c) being used to form a lateral sliding limit for the main beam (1) and a secondary beam (2) resting on the main beam (1).

4. The bottom formwork support system for roof slabs with beams according to claim 3 is characterized in that: The bearing plate (32b) is rectangular, has space for arranging two main beams (1) in the length direction, and space for arranging a single secondary beam (2) in the width direction.

5. The bottom formwork support system for roof slabs with beams according to claim 2 is characterized in that: The suspension rod (5) is suspended on the main beam (1) or the secondary beam (2) via a T-shaped cross bar section, and the cross bar section is hidden inside the main beam (1) or the secondary beam (2).

6. The bottom formwork support system for roof slabs with beams according to claim 1 is characterized in that: The early-detachment jacking support comprises an early-detachment sliding sleeve (8) movably sleeved on the upper part of the jacking support adjusting screw rod (7), the early-detachment sliding sleeve (8) being supported on an early-detachment nut (9), an early-detachment tray (10) being welded or integrally formed on the exterior of the early-detachment sliding sleeve (8), and a main beam limiting structure for limiting the sliding of the main beam (1) being provided on the early-detachment tray (10).

7. The bottom formwork support system for roof slabs with beams according to claim 6 is characterized in that: The main beam limiting structure comprises flanges (10a) on both sides of the early removal tray (10), and a positioning tongue (11a) located in front of the early removal tray (10), the positioning tongue (11a) protruding from the upper front end of the support rib (11), the support rib (11) being welded and fixed to the early removal sliding sleeve (8), and being welded and fixed to the early removal tray (10) held above.

8. The bottom formwork support system for roof slabs with beams according to any one of claims 1 to 7, characterized in that: The delayed demolition component comprises a delayed demolition base (13), a middle hole for a supporting adjustment screw (7) to pass through is provided in the middle of the delayed demolition base (13), the delayed demolition base (13) is pressed on the top of the support vertical pipe (31) by the supporting adjustment nut (12), and a connecting ear (13a) extending upward is formed on the delayed demolition base (13); the connecting ear (13a) is provided with a beam bottom mold bearing beam connecting structure for connecting with the beam bottom mold bearing beam (6), or the connecting ear (13a) is fixedly connected with a beam bottom mold bearing beam connecting component (14), and the beam bottom mold bearing beam connecting component (14) is provided with the beam bottom mold bearing beam connecting structure; the base positioning sleeve (15) is integrally formed or welded and fixed on the lower end surface of the delayed demolition base (13).

9. The bottom formwork support system for roof slabs with beams according to claim 8, characterized in that: The beam bottom formwork bearing beam connecting member (14) is in the form of a rectangular channel steel structure. The delayed dismantling base (13) is provided with two connecting ears (13a) located on both sides of the rectangular channel steel. The two side walls of the beam bottom formwork bearing beam connecting member (14) are provided with a plurality of bolt penetration holes (14a). The bolt penetration holes (14a) are used to be fixedly connected to the delayed dismantling base (13) and the beam bottom formwork bearing beam (6) respectively by penetration bolts. The number of the bolt penetration holes (14a) is greater than or equal to the sum of the number of bolt penetration holes at the corresponding ends of the connecting ears (13a) and the beam bottom formwork bearing beam (6).

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