Safety protection supporting device for high-altitude cantilever formwork

Abstract

The invention belongs to the technical field of overhanging formworks, and particularly relates to a high-altitude overhanging formwork safety protection supporting device which comprises single-truss overhanging formwork supporting equipment, the single-truss overhanging formwork supporting equipment comprises an overhanging cross beam and a truss connecting piece movably installed at one end of the overhanging cross beam, and a balance weight cross beam is movably installed on the side edge of the truss connecting piece. A vertical supporting rod and a balance weight beam are movably installed above the truss connecting piece, the vertical supporting rod and the space connecting beam are of a structure formed by combining a plurality of truss units, the truss units with the number corresponding to that of various components are connected in an end-to-end butt joint mode, and the tail of the vertical supporting rod, the tail of the overhanging beam and the tail of the balance weight beam are connected to the truss connecting piece in a butt joint mode. The mode that the truss units are combined for field assembly is adopted, and the length of each component can be adjusted by directly increasing or reducing the number of the truss units according to the size requirement in actual engineering.

Description

Technical Field

[0001] The invention belongs to the field of cantilever formwork, in particular to a safety protection support device for a high-altitude cantilever formwork. Background Art

[0002] Compared with the unified facades of traditional high-rise buildings, modern buildings often have protruding facades such as high-altitude cantilevered balconies. A cantilevered balcony is a building structure that extends outward from the main structure of the building to form a semi-open space. It is usually used in residential or commercial buildings to increase the usable area and provide additional leisure or viewing space. In order to build a cantilevered balcony, it is usually necessary to first build a cantilevered balcony formwork to form a temporary structural component of the cantilevered balcony structure, and then the cantilevered balcony is initially formed by pouring concrete.

[0003] A patent document with publication number CN216007813U discloses a cantilever structure support template, including a cantilever cavity template, a bottom plate, an arc template and a cantilever template, wherein the cantilever template is suspended on a side of the cantilever cavity template away from the load-bearing edge beam, one end of the cantilever template is connected to the upper end of the arc template, and the other end of the cantilever template extends away from the sloping roof, and a cantilever plate can be formed by pouring concrete on the top of the cantilever cavity template and the top of the cantilever template. The cantilever structure support template provided by the utility model can improve construction efficiency.

[0004] Among the traditional technical solutions, there is a form of compression rod force using diagonal struts to support the end of the cantilevered part and then connect it to the next floor. There is also a form of tension using the floor slab using steel sections that are bolted through the floor slab for connection and fixation and then extended out of the cantilevered part. There is also a combination of the two for combined force. However, this also brings problems such as difficulty in erection, high risk factor of erection, the need for customization for different construction scenarios, and easy damage to the floor slab.

[0005] To this end, the present invention provides a high-altitude cantilever formwork safety protection support device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a high-altitude cantilever formwork safety protection support device described in the present invention includes a single-frame cantilever formwork support device, a plurality of the single-frame cantilever formwork support devices are provided, and the plurality of the single-frame cantilever formwork support devices are placed on the poured floor slab, the single-frame cantilever formwork support device includes a cantilever beam and a truss connecting piece movably installed at one end of the cantilever beam, two cantilever beams and truss connecting pieces are provided, a counterweight beam is movably installed on the side of the two truss connecting pieces, a vertical brace is movably installed above the two truss connecting pieces, a plurality of plane connecting beams are installed between the two cantilever beams, a plurality of plane connecting beams are installed between the two counterweight beams, and a space connecting beam is movably installed between the two truss connecting pieces;

[0008] A fixed pulley is movably installed above the two vertical struts, and a steel cable is movably installed on the fixed pulley, one end of the steel cable is connected to the end of the counterweight beam, and the other end of the steel cable is connected to the end of the cantilever beam. A counterweight block is placed above the two counterweight beams. The counterweight beam, vertical struts and space connecting beams are structures formed by the combination of multiple truss units. A plurality of bolt members are installed at the bottom of the truss connecting member, and the bolt members are used to fix the truss connecting member on the floor slab. A plurality of bolt members are installed at the tail of the counterweight beam. The cantilever beam portion is suspended outside the floor slab, and the cantilever beam provides a formwork support point for the cantilevered portion of the upper floor to be cast. A plurality of single-frame cantilever formwork support devices are connected by a plurality of plane connecting beams and space connecting beams, and a stress alarm is installed at the end position of the steel cable.

[0009] Preferably, the truss unit is a factory prefabricated part, which is welded in the factory from four longitudinal round steel tubes, three transverse layers of twelve round steel tubes, and eight groups of X-shaped round steel tube assemblies. The four longitudinal round steel tubes at the head of the truss unit are partially extended along the longitudinal direction to form an extension tube, and the outer diameter of the extension tube is consistent with the inner diameter of the longitudinal round steel tube of the truss unit. Multiple truss units are combined by the outer diameter of the extension tube and the inner diameter of the longitudinal round steel tube of the truss unit.

[0010] Preferably, the truss connecting piece is welded into a cube shape by twelve round steel pipes and four groups of X-shaped round steel pipes, and the inner diameter of the round steel pipe of the truss connecting piece is consistent with the outer diameter of the extension pipe.

[0011] Preferably, a steel cable connects the end of the cantilever beam and the end of the counterweight beam, so that the single-frame cantilever formwork support equipment forms a tensioned system, and the steel cable provides tension to balance the load transmitted from the formwork and the counterpressure load applied by the counterweight block.

[0012] Preferably, the stress alarm uses fiber grating as a stress and strain sensor, connects the sensor to a buzzer, sets a certain stress and strain threshold, and when the threshold is exceeded, the buzzer alarm sounds a buzzer. The fiber grating strain sensor, micro power supply, and buzzer are packaged into a tubular stress alarm and attached to the surface of the steel cable to monitor the real-time stress of the steel cable.

[0013] Preferably, two kits are installed at both ends of the steel cable, one of which is sleeved on the end of the counterweight beam, and the other is sleeved on the end of the cantilever beam. The fixed pulley includes a fixed base and four plug-in tubes installed below the fixed base, the four plug-in tubes are plugged into the top of the vertical support rod, and a connecting pulley is installed at the upper end of the fixed base. The middle section of the steel cable is located inside the connecting pulley.

[0014] Preferably, the bolt member comprises a special-shaped block and an arc-shaped through groove and an O-shaped through groove which are provided inside the special-shaped block, the arc-shaped through groove and the O-shaped through groove are connected, and a plurality of connecting bolts are threadedly mounted on the special-shaped block.

[0015] Preferably, both ends of the transverse and longitudinal round steel pipes formed by the truss connecting parts are penetrated by through groove 1 and through groove 2, and the end of the extension pipe is also penetrated by through groove 1 and through groove 2, and pin 1 is inserted into through groove 1, and pin 2 is inserted into through groove 2.

[0016] Preferably, the counterweight block is a counterweight reinforcement block, side fixing blocks are fixedly installed on both sides of the counterweight reinforcement block, a plurality of connecting reinforcement members are fixedly installed inside the side fixing block groove, and a plurality of adaptable special-shaped blocks are fixedly installed on the side of the counterweight reinforcement block facing the single-frame cantilever formwork supporting device, and the plurality of adaptable special-shaped blocks are inserted into the counterweight beam at the corresponding position.

[0017] Preferably, the connection reinforcement member includes a hydraulic cylinder fixedly installed inside the side fixing block, the end of the hydraulic cylinder is connected to a lifting column via a shaft, a sleeve is installed at one end of the lifting column, the lifting column is slidably arranged inside the sleeve, an expansion component is installed inside the sleeve, a plurality of strip grooves are opened through the sleeve, the expansion component includes a strip airbag installed inside the strip groove and an annular airbag fixedly installed inside the sleeve, and the annular airbag is connected to the plurality of strip airbags.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The high-altitude cantilever formwork safety protection support device described in the present invention determines the position where the single-frame cantilever formwork support equipment is fixed to the floor slab according to the design length of each component and the mass of the counterweight block designed for the formwork load. According to the size of each component, the number of truss units required for each component is determined, and the corresponding number of truss units of each component are connected end to end. The tails of the vertical struts, cantilever beams and counterweight beams are connected to the truss connecting parts to form a rough framework of the single-frame cantilever formwork support equipment. The steel cable is tightened to make the middle beam part of the single-frame cantilever formwork support equipment appear in a recurved state, and a stress alarm device is installed to assemble the single-frame cantilever formwork support equipment. The formwork support equipment is straightened and moved to the designated position on the floor slab using tools, and then the single-frame cantilever formwork support equipment is fixed to the floor slab using bolts. The present invention adopts truss connectors and truss units composed of round steel pipes as load-bearing components, which are lighter in weight and convenient to transport. The present invention adopts a truss unit combination for on-site assembly, and can directly increase or decrease the number of truss units according to the size requirements in the actual project to adjust the length of each component. After the completion of this project, the components can be directly decomposed into truss units for recycling. The recycled truss units can be connected and used again according to the actual size of the next project after quality inspection. They can be shipped once and used many times.

[0020] 2. The high-altitude cantilever formwork safety protection support device described in the present invention connects the end of the cantilever beam and the end of the counterweight beam through a steel cable, so that a single cantilever formwork support device forms a tensioning system. The steel cable provides tension to balance the load transmitted from the formwork and the back pressure load applied by the counterweight. The stress alarm uses a fiber grating as a stress and strain sensor, and the sensor is connected to a buzzer. A certain stress and strain threshold is set. When the threshold is exceeded, the buzzer alarm emits a buzzing sound. The fiber grating strain sensor, a micro power supply, and a buzzer are packaged into a tubular stress alarm and attached to the surface of the steel cable to monitor the real-time stress of the steel cable. A tensioning system is formed through vertical struts. There are fewer suspended arrangements, less construction risks, less construction difficulty, and it is safer. In addition, the steel cable is tensioned, so there is no instability problem.

[0021] 3. The high-altitude cantilever formwork safety protection support device described in the present invention is driven by a hydraulic cylinder to extend and descend the lifting column. At this time, the lifting column, sleeve and expansion assembly descend to the inside of the hole in the floor slab. After the bottom of the sleeve contacts the bottom of the hole, the continued descent of the lifting column will cause the lifting column to slide and descend inside the sleeve until the end of the lifting column squeezes the annular air bag, so that the annular air bag is compressed, and the air inside the annular air bag enters the four strip air bags. Therefore, the four strip air bags expand and then come into close contact with the side walls of the floor slab hole. Therefore, the single-frame cantilever formwork support equipment is a cantilever formwork. When there is a problem with the load-bearing capacity of the cantilever beam, the counterweight beam and the counterweight block will move upward in an arc, that is, tilt. At this time, the four strip air bags expand and then come into close contact with the side walls of the floor slab hole, which can strengthen the connection between the counterweight beam and the counterweight block and the floor slab, and avoid the counterweight beam and the counterweight block from tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is an overall stereogram of the present invention;

[0024] Figure 2 is a three-dimensional schematic diagram of a truss unit in the present invention;

[0025] Figure 3 It is a three-dimensional schematic diagram of the fixed pulley in the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the stress alarm in the present invention;

[0027] Figure 5 It is a three-dimensional schematic diagram of the truss connecting member and the bolt member in the present invention;

[0028] Figure 6 It is a three-dimensional schematic diagram of a bolt member in the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of pin 1 and pin 2 in the present invention;

[0030] Figure 8 It is a three-dimensional schematic diagram of the counterweight reinforcement block in the present invention;

[0031] Fig. 9 It is a three-dimensional schematic diagram of the adaptable special-shaped block and the connection reinforcement member in the present invention;

[0032] Fig.10 It is a schematic diagram of the disassembly of the connection reinforcement member in the present invention;

[0033] Fig.11 It is a three-dimensional schematic diagram of the expansion assembly in the present invention.

[0034] In the figure: 1. Single-frame cantilever formwork support equipment; 11. Cantilever beam; 12. Counterweight beam; 13. Vertical support rod; 14. Steel cable; 141. Kit; 15. Fixed pulley; 151. Fixed base; 152. Plug-in tube; 153. Contact pulley; 16. Truss unit; 161. Extension tube; 1611. Pin 1; 1612. Pin 2; 17. Truss connecting piece; 171. Through slot 1; 172. Through slot 2; 18. Bolt; 181. Different shaped block; 182, arc-shaped through groove; 183, eight-shaped through groove; 184, connecting bolt; 19, stress alarm; 2, plane connecting beam; 3, space connecting beam; 4, counterweight block; 5, counterweight reinforcement block; 51, side fixing block; 52, connecting reinforcement; 521, hydraulic cylinder; 522, lifting column; 523, sleeve; 5231, strip groove; 524, expansion assembly; 5241, annular airbag; 5242, strip airbag; 53, adapting special-shaped block. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] Embodiment 1

[0037] like Figure 1-5 As shown, a high-altitude cantilever formwork safety protection support device according to an embodiment of the present invention comprises a single-frame cantilever formwork support device 1, a plurality of single-frame cantilever formwork support devices 1 are provided, and the plurality of single-frame cantilever formwork support devices 1 are placed on a poured floor slab, the single-frame cantilever formwork support device 1 comprises a cantilever beam 11 and a truss connecting member 17 movably installed at one end of the cantilever beam 11, two cantilever beams 11 and truss connecting members 17 are provided, a counterweight beam 12 is movably installed on the side of the two truss connecting members 17, a vertical strut 13 is movably installed above the two truss connecting members 17, a plurality of plane connecting beams 2 are installed between the two cantilever beams 11, a plurality of plane connecting beams 2 are installed between the two counterweight beams 12, and a space connecting beam 3 is movably installed between the two truss connecting members 17;

[0038] A fixed pulley 15 is movably installed above the two vertical struts 13, and a steel cable 14 is movably installed on the fixed pulley 15. One end of the steel cable 14 is connected to the end of the counterweight beam 12, and the other end of the steel cable 14 is connected to the end of the cantilever beam 11. A counterweight block 4 is placed above the two counterweight beams 12. The counterweight beam 12, the vertical struts 13 and the space connecting beam 3 are a structure formed by a combination of multiple truss units 16. A plurality of bolt members 18 are installed at the bottom of the truss connecting member 17, and the bolt member 18 is used to fix the truss connecting member 17 on the floor slab. A plurality of bolt members 18 are installed at the tail of the counterweight beam 12. The cantilever beam 11 is partially suspended outside the floor slab. The cantilever beam 11 provides a template support point for the cantilevered part of the upper floor to be poured. A plurality of single-frame cantilever template support devices 1 are connected by a plurality of plane connecting beams 2 and space connecting beams 3. A stress alarm 19 is installed at the end of the steel cable 14.

[0039] Specifically, the length of the cantilever beam 11 is designed according to the length of the cantilevered floor slab to be cast on the previous floor, the lengths of the vertical struts 13, the counterweight beam 12 and the plane connecting beam 2 are designed according to the size of the floor slab and the net height of the floor, the formwork load is calculated according to the casting materials in the on-site construction and the mass of the formwork, the mass of the counterweight block 4 is designed according to the design length of each component and the formwork load, the position where the single-frame cantilever formwork support equipment 1 is fixed to the floor slab is determined, the number of truss units 16 required for each component is determined according to the size of each component, the truss units 16 of the corresponding number of each component are connected end to end, the tail ends of the vertical struts 13, the cantilever beam 11 and the counterweight beam 12 are connected to the truss connecting piece 17, thereby forming a rough framework of the single-frame cantilever formwork support equipment 1, and the steel cable is tightened. 14 makes the beam part of the single-frame cantilever formwork support device 1 just appear in the reverse bending state, install the stress alarm device 19, use the tool to straighten the assembled single-frame cantilever formwork support device 1 and move it to the specified position on the floor, and then use the bolt 18 to fix the single-frame cantilever formwork support device 1 to the floor. The adjacent single-frame cantilever formwork support devices are connected by a plurality of space connecting beams 3 and a plurality of plane connecting beams 2, thereby forming a high-altitude cantilever formwork safety protection support device. According to the weight of the counterweight, a counterweight block 4 of corresponding weight is placed on the counterweight beam 12. Most of the existing technologies use steel as a load-bearing component, which is heavy and difficult to transport. The present invention uses a truss connecting piece 17 and a truss unit 16 composed of round steel pipes as a load-bearing component, which has a higher quality. The invention adopts the method of on-site assembly by combining truss units 16, and can directly increase or decrease the number of truss units 16 according to the size requirements in the actual project to adjust the length of each component. After the project is completed, each component can be directly decomposed into truss units 16 for recycling. After the quality inspection of the recycled truss units 16, they can be connected and used according to the actual size of the next project. They can be shipped once and used many times, with a high recycling rate. The existing technology mostly adopts the method of connecting the steel section and the floor slab by bolts penetrating the floor slab, so that the floor slab is subjected to tension and the floor slab is subjected to The force point is only a small part of the area around the bolt fixing point, the force-bearing area is small, the floor slab is prone to collapse, the bearing capacity of a single bolt is small, and many bolts are required to penetrate the floor slab. Too many penetration points are also prone to damage the floor slab. The present invention uses a counterweight block 4 of appropriate mass to balance the load on the cantilever part through calculation, so there is no excessive penetration damage to the floor slab, and the large force-bearing area on the floor slab will not have too much impact on the floor slab. The prior art mostly uses compression struts, and the compression components have the problem of instability. Under the same situation, a larger cross-sectional area is required for the tension components, and the compression struts are suspended, which has high construction risks and great construction difficulties. The present invention uses a steel cable 14 to connect the cantilever end and the counterweight end, and forms a tensioning system through the vertical strut 13. There are few suspended arrangements and low construction risks.The construction difficulty is small and safer. In addition, the steel cable 14 is used for tensioning, so there is no instability problem. The present invention uses a plurality of spatial connecting beams 3 and a plurality of plane connecting beams 2 to connect each single-frame cantilever formwork support device 1 to form an overall force-bearing system with large lateral stiffness, overall joint force, high fault tolerance and high safety factor.

[0040] like Figure 2 As shown, the truss unit 16 is a factory prefabricated component, which is welded in the factory by four longitudinal round steel tubes, three transverse layers of twelve round steel tubes, and eight groups of X-shaped round steel tube assemblies. The four longitudinal round steel tubes at the head of the truss unit 16 are partially extended along the longitudinal direction to form an extension tube 161. The outer diameter of the extension tube 161 is consistent with the inner diameter of the longitudinal round steel tube of the truss unit 16. Multiple truss units 16 are combined by the outer diameter of the extension tube 161 and the inner diameter of the longitudinal round steel tube of the truss unit 16.

[0041] Specifically, the present invention adopts a truss unit 16 as the main force-bearing structure. The same mass can withstand more loads and is suitable for high-altitude large formwork and large cantilever projects. The single-frame cantilever formwork support equipment 1 is modularly designed, and the floor size, cantilever length, and floor height requirements can be met by adding truss units 16 and increasing the number of single-frame cantilever formwork support equipment 1.

[0042] like Figure 5 As shown, the truss connecting member 17 is welded into a cube shape by twelve round steel pipes and four groups of X-shaped round steel pipes, and the inner diameter of the round steel pipe of the truss connecting member 17 is consistent with the outer diameter of the extension pipe 161.

[0043] Specifically, the truss connector 17 is welded into a cube shape by 12 round steel pipes with an outer diameter of 20 mm and a wall thickness of 2 mm and 4 groups of X-shaped round steel pipes with an outer diameter of 20 mm and a wall thickness of 2 mm. The design position of the extended steel pipe can be adjusted according to actual conditions. The size of the extended steel pipe of the truss connector 17 is an outer diameter of 18 mm and a wall thickness of 2 mm or an outer diameter of 20 mm and a wall thickness of 2 mm. The extended round steel pipe of the truss connector 17 with an outer diameter of 18 mm and a wall thickness of 2 mm is consistent with the inner diameter of the vertical round steel pipe of the truss unit 16.

[0044] like Figure 1 and 4As shown, the steel cable 14 connects the end of the cantilever beam 11 and the end of the counterweight beam 12, so that the single-frame cantilever formwork support device 1 forms a string system. The steel cable 14 provides tension to balance the load transmitted from the formwork and the counterpressure load applied by the counterweight block 4. The stress alarm 19 uses a fiber grating as a stress and strain sensor. The sensor is connected to a buzzer, and a certain stress and strain threshold is set. When the threshold is exceeded, the buzzer alarm sounds a buzzer. The fiber grating strain sensor, a tiny power supply, and a buzzer are packaged into a tubular stress alarm and attached to the steel cable. 14 surface, monitor the real-time stress of the steel cable 14, two sets 141 are installed at both ends of the steel cable 14, one set 141 is sleeved on the end of the counterweight beam 12, and the other set 141 is sleeved on the end of the cantilever beam 11. The fixed pulley 15 includes a fixed base 151 and four plug-in tubes 152 installed below the fixed base 151, and the four plug-in tubes 152 are plugged into the top of the vertical support rod 13. A connecting pulley 153 is installed on the upper end of the fixed base 151, and the middle section of the steel cable 14 is inside the connecting pulley 153.

[0045] like Figure 6 As shown, the bolt member 18 includes a special-shaped block 181 and an arcuate through groove 182 and an O-shaped through groove 183 which are opened inside the special-shaped block 181 . The arcuate through groove 182 and the O-shaped through groove 183 are connected. A plurality of connecting bolts 184 are threadedly installed on the special-shaped block 181 .

[0046] Specifically, the single-frame cantilever formwork support equipment 1 is a self-balancing force system. The bolt member 18 only plays a positioning role and does not participate in the analysis of force balance. It helps workers determine the installation position of each component during actual installation. The bolt member 18 is taken so that the inner wall of the arc-shaped through groove 182 fits with the outer diameter of the corresponding truss unit 16 or the bottom round steel pipe of the truss connecting member 17, and then multiple connecting bolts 184 are screwed to connect the connecting bolts 184 to the inside of the floor slab, so that the single-frame cantilever formwork support equipment 1 can be initially stabilized.

[0047] like Figure 7 As shown, both ends of the transverse and longitudinal round steel pipes formed by the truss connecting member 17 are penetrated by a through groove 171 and a through groove 2 172, and the end of the extension pipe 161 is also penetrated by a through groove 171 and a through groove 2 172, and a pin 1611 is inserted into the through groove 171, and a pin 2 1612 is inserted into the through groove 172.

[0048] Specifically, a plurality of through grooves 171 and 172 are provided on the basis of the above-mentioned truss unit 16 and truss connector 17. When the extension tube 161 is inserted into the corresponding round steel tube of the truss connector 17, the through groove 171 provided on the extension tube 161 overlaps with the through groove 171 provided on the truss connector 17, and the removal pin 1611 can be inserted into the overlapping through groove 171. At this time, the through groove 172 provided on the extension tube 161 also overlaps with the through groove 172 provided on the truss connector 17, and the removal pin 1612 can be inserted into the overlapping through groove 172, thereby strengthening the connection between the truss unit 16 and the truss connector 17. The connection between the truss units 16 can also be arranged in this way.

[0049] Specifically, the load transmitted on the steel cable 14 is related to the load transmitted to the cantilever beam 11 of the single cantilever formwork support device 1 and the height of the vertical support rod 13. The load transmitted on the steel cable 14 can be calculated, and the appropriate cross-sectional size can be selected. The load transmitted on the steel cable 14 is F3, and the calculation formula of F3 is as follows:

[0050]

[0051] The derivation process is as follows:

[0052] F3=F2 / cosα

[0053] α=arctan(l2 / h)

[0054] F2=2ρ / l3

[0055] In the above formula, α is the angle between the steel cable 14 and the vertical strut 13 in the cantilever beam 11, l2 is the length of the cantilever beam 11; h is the length of the vertical strut 13; F2 is the load transferred to the cantilever beam 11 of the single cantilever formwork supporting device 1; ρ is the design value of the line load transferred to the cantilever beam 11 along the long direction of the plane connecting beam 2; l3 is the length of the plane connecting beam 2.

[0056] Specifically, the load of the counterweight block 4 is determined according to the specific site conditions. The load of the counterweight block 4 is F1, and the calculation formula of F1 is:

[0057]

[0058] The derivation process is as follows:

[0059] F1=F3*cosβ

[0060] β=arctan(l1 / h)

[0061] F3=F2 / cosα

[0062] α=arctan(l2 / h)

[0063] F2=2ρ / l3

[0064] In the above formula, α is the angle between the steel cable 14 and the vertical strut 13 at the cantilever beam 11, β is the angle between the steel cable 14 and the vertical strut 13 at one side of the counterweight beam 12; l2 is the length of the cantilever beam 11; l1 is the length of the counterweight beam 12; l3 is the length of the plane connecting beam 2; h is the length of the vertical strut 13; F2 is the load transferred to the cantilever beam 11 of the single cantilever formwork supporting device 1; ρ is the design value of the line load transferred to the cantilever beam 11 along the long direction of the plane connecting beam 2.

[0065] Embodiment 2

[0066] like Figure 8-11 As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the counterweight block 4 is preferably a counterweight reinforcement block 5, and side fixing blocks 51 are fixedly installed on both sides of the counterweight reinforcement block 5, and a plurality of connection reinforcement members 52 are fixedly installed inside the groove of the side fixing block 51, and a plurality of adapting special-shaped blocks 53 are fixedly installed on the side of the counterweight reinforcement block 5 facing the single-frame cantilever formwork support device 1, and a plurality of adapting special-shaped blocks 53 are plugged into the counterweight crossbeam 12 at the corresponding position, and the connection reinforcement member 52 includes a hydraulic cylinder 52 fixedly installed inside the side fixing block 51. 1. The end of the hydraulic cylinder 521 is connected to a lifting column 522 through a shaft. A sleeve 523 is installed at one end of the lifting column 522. The lifting column 522 is slidably arranged inside the sleeve 523. An expansion component 524 is installed inside the sleeve 523. A plurality of strip grooves 5231 are penetrated inside the sleeve 523. The expansion component 524 includes a strip air bag 5242 installed inside the strip groove 5231 and an annular air bag 5241 fixedly installed inside the sleeve 523. The annular air bag 5241 is connected with a plurality of strip air bags 5242.

[0067] Specifically, the counterweight reinforcement block 5 with the calculated counterweight mass is placed on the single-frame cantilever formwork support device 1. At this time, multiple adaptable special-shaped blocks 53 are plugged into the corresponding truss unit 16, so that the counterweight reinforcement block 5 and the single-frame cantilever formwork support device 1 form a relatively stable connection. At this time, the connecting reinforcement member 52 is facing the floor slab, and a hole is punched on the floor slab so that the hole and the connecting reinforcement member 52 are in the same vertical position. The hydraulic cylinder 521 drives the lifting column 522 to extend and descend. That is, at this time, the lifting column 522, the sleeve 523 and the expansion component 524 descend to the inside of the hole in the floor slab. After the bottom of the sleeve 523 contacts the bottom of the hole, the continued descent of the lifting column 522 will cause the lifting column 522 to be in the sleeve 5 23 slides downward inside until the end of the lifting column 522 squeezes the annular airbag 5241, so that the annular airbag 5241 is compressed, and the air inside the annular airbag 5241 enters into the four strip airbags 5242, so that the four strip airbags 5242 expand and then come into close contact with the side walls of the floor holes. Therefore, the single-frame cantilever formwork supporting device 1 is a cantilever formwork. When there is a load-bearing problem with the cantilever beam 11, the counterweight beam 12 and the counterweight block 4 will move upward in an arc, that is, tilt. At this time, the four strip airbags 5242 expand and then come into close contact with the side walls of the floor holes, which can strengthen the connection between the counterweight beam 12 and the counterweight block 4 and the floor, and avoid the counterweight beam 12 and the counterweight block 4 from tilting.

[0068] Working principle: The length of the cantilever beam 11 is designed according to the length of the cantilevered floor slab to be cast on the previous floor. The lengths of the vertical struts 13, the counterweight beam 12 and the plane connecting beam 2 are designed according to the size of the floor slab and the net height of the floor. The template load is calculated according to the casting materials and the mass of the template during on-site construction. The mass of the counterweight block 4 is designed according to the design length of each component and the template load. The position where the single cantilever template support equipment 1 is fixed to the floor slab is determined. The number of truss units 16 required for each component is determined according to the size of each component. The truss units 16 of the corresponding number of each component are connected end to end, and the tails of the vertical struts 13, the cantilever beam 11 and the counterweight beam 12 are connected to the truss connector 17. The general framework of the single-frame cantilever formwork support equipment 1 is formed, the steel cable 14 is tightened to make the middle beam part of the single-frame cantilever formwork support equipment 1 just appear in the reverse bending state, the stress alarm device 19 is installed, the assembled single-frame cantilever formwork support equipment 1 is straightened and moved to the designated position on the floor slab using tools, and then the single-frame cantilever formwork support equipment 1 is fixed to the floor slab using bolts 18. The adjacent single-frame cantilever formwork support equipment 1 is connected by a plurality of space connecting beams 3 and a plurality of plane connecting beams 2, thereby forming a high-altitude cantilever formwork safety protection support device, and a counterweight block 4 of corresponding mass is placed on the counterweight beam 12 according to the counterweight mass, and the counterweight reinforcement block 5 of the calculated counterweight mass is placed On the single-frame cantilever formwork support device 1, at this time, multiple adaptor special-shaped blocks 53 will be inserted into the corresponding truss unit 16, so that the counterweight reinforcement block 5 and the single-frame cantilever formwork support device 1 form a relatively stable connection. At this time, the connecting reinforcement member 52 is facing the floor slab, and a hole is punched on the floor slab so that the hole and the connecting reinforcement member 52 are in the same vertical position. The hydraulic cylinder 521 drives the lifting column 522 to extend and descend. That is, at this time, the lifting column 522, the sleeve 523 and the expansion component 524 descend to the inside of the hole in the floor slab. After the bottom of the sleeve 523 contacts the bottom of the hole, the continued descent of the lifting column 522 will cause the lifting column 522 to slide down inside the sleeve 523 until it is lifted. The annular airbag 5241 is squeezed at the end of the lifting column 522, so that the annular airbag 5241 is compressed, and the air inside the annular airbag 5241 enters into the four strip airbags 5242, so that the four strip airbags 5242 expand and then come into close contact with the side walls of the floor holes. Therefore, the single-frame cantilever formwork supporting device 1 is a cantilever formwork. When there is a load-bearing problem with the cantilever beam 11, the counterweight beam 12 and the counterweight block 4 will move upward in an arc, that is, tilt. At this time, the four strip airbags 5242 expand and then come into close contact with the side walls of the floor holes, which can strengthen the connection between the counterweight beam 12 and the counterweight block 4 and the floor, and avoid the counterweight beam 12 and the counterweight block 4 from tilting.

[0069] The above shows and describes the basic principles, main features and 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. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-altitude cantilever formwork safety protection support device, comprising a single-frame cantilever formwork support device (1), wherein a plurality of the single-frame cantilever formwork support devices (1) are provided, and the plurality of the single-frame cantilever formwork support devices (1) are placed on a poured floor slab, characterized in that: The single-frame cantilever formwork support device (1) comprises a cantilever beam (11) and a truss connecting member (17) movably mounted at one end of the cantilever beam (11), two cantilever beams (11) and two truss connecting members (17) are provided, a counterweight beam (12) is movably mounted on the sides of the two truss connecting members (17), a vertical support rod (13) is movably mounted above the two truss connecting members (17), a plurality of plane connecting beams (2) are mounted between the two cantilever beams (11), a plurality of plane connecting beams (2) are mounted between the two counterweight beams (12), and a space connecting beam (3) is movably mounted between the two truss connecting members (17); A fixed pulley (15) is movably installed above the two vertical struts (13), and a steel cable (14) is movably installed on the fixed pulley (15). One end of the steel cable (14) is connected to the end of the counterweight beam (12), and the other end of the steel cable (14) is connected to the end of the cantilever beam (11). A counterweight block (4) is placed above the two counterweight beams (12). The counterweight beam (12), the vertical struts (13) and the space connecting beam (3) are a structure formed by combining multiple truss units (16). The truss connecting member (17) A plurality of bolts (18) are installed at the bottom, and the bolts (18) are used to fix the truss connecting member (17) on the floor slab. A plurality of bolts (18) are installed at the tail of the counterweight beam (12). The cantilever beam (11) is partially suspended outside the floor slab. The cantilever beam (11) provides a template support point for the cantilevered part of the upper floor to be poured. A plurality of the single-frame cantilever template support devices (1) are connected by a plurality of the plane connecting beams (2) and the space connecting beams (3). A stress alarm (19) is installed at the end of the steel cable (14).

2. A high-altitude cantilever formwork safety protection support device according to claim 1, characterized in that: The truss unit (16) is a factory prefabricated component, which is welded in the factory from four longitudinal round steel pipes, three transverse layers of twelve round steel pipes, and eight groups of X-shaped round steel pipe assemblies. The four longitudinal round steel pipes at the head of the truss unit (16) are partially extended in the longitudinal direction to form an extension pipe (161). The outer diameter of the extension pipe (161) is consistent with the inner diameter of the longitudinal round steel pipe of the truss unit (16). Multiple truss units (16) are combined through the outer diameter of the extension pipe (161) and the inner diameter of the longitudinal round steel pipe of the truss unit (16).

3. A high-altitude cantilever formwork safety protection support device according to claim 1, characterized in that: The truss connecting piece (17) is welded into a cube shape by twelve round steel pipes and four groups of X-shaped round steel pipes. The inner diameter of the round steel pipe of the truss connecting piece (17) is consistent with the outer diameter of the extension pipe (161).

4. A high-altitude cantilever formwork safety protection support device according to claim 1, characterized in that: The steel cable (14) connects the end of the cantilever beam (11) and the end of the counterweight beam (12), so that the single-frame cantilever formwork support device (1) forms a tension system. The steel cable (14) provides tension to balance the load transmitted from the formwork and the counterpressure load applied by the counterweight block (4).

5. The high-altitude cantilever formwork safety protection support device according to claim 1 is characterized in that: The stress alarm (19) uses a fiber Bragg grating as a stress strain sensor, connects the sensor to a buzzer, sets a certain stress strain threshold, and emits a buzzer alarm when the threshold is exceeded. The fiber Bragg grating strain sensor, a micro power source, and a buzzer are packaged into a tubular stress alarm and attached to the surface of the steel cable (14) to monitor the real-time stress of the steel cable.

6. The high-altitude cantilever formwork safety protection support device according to claim 1 is characterized in that: Two sets (141) are installed at both ends of the steel cable (14), one of the sets (141) is sleeved on the end of the counterweight beam (12), and the other set (141) is sleeved on the end of the cantilever beam (11). The fixed pulley (15) includes a fixed base (151) and four plug-in tubes (152) installed below the fixed base (151), the four plug-in tubes (152) are plugged into the top of the vertical support rod (13), and a connecting pulley (153) is installed at the upper end of the fixed base (151). The middle section of the steel cable (14) is located inside the connecting pulley (153).

7. The high-altitude cantilever formwork safety protection support device according to claim 1 is characterized in that: The bolt member (18) comprises a special-shaped block (181) and an arc-shaped through groove (182) and an eight-shaped through groove (183) which are arranged inside the special-shaped block (181); the arc-shaped through groove (182) and the eight-shaped through groove (183) are connected to each other; and a plurality of connecting bolts (184) are threadedly mounted on the special-shaped block (181).

8. The high-altitude cantilever formwork safety protection support device according to claim 1 is characterized in that: Both ends of the transverse and longitudinal round steel pipes formed by the truss connecting member (17) are penetrated by a through groove 1 (171) and a through groove 2 (172), and the end of the extension pipe (161) is also penetrated by a through groove 1 (171) and a through groove 2 (172), and a pin 1 (1611) is inserted into the through groove 1 (171), and a pin 2 (1612) is inserted into the through groove 2 (172).

9. The high-altitude cantilever formwork safety protection support device according to claim 1 is characterized in that: The counterweight block (4) is preferably a counterweight reinforcement block (5), and side fixing blocks (51) are fixedly installed on both sides of the counterweight reinforcement block (5), and a plurality of connection reinforcement members (52) are fixedly installed inside the groove of the side fixing block (51), and a plurality of adaptable special-shaped blocks (53) are fixedly installed on the side of the counterweight reinforcement block (5) facing the single-frame cantilever formwork support device (1), and the plurality of adaptable special-shaped blocks (53) are inserted into the counterweight crossbeam (12) at corresponding positions.

10. A high-altitude cantilever formwork safety protection support device according to claim 9, characterized in that: The connection reinforcement member (52) comprises a hydraulic cylinder (521) fixedly mounted inside the side fixing block (51); the end of the hydraulic cylinder (521) is connected to a lifting column (522) via a shaft; a sleeve (523) is mounted at one end of the lifting column (522); the lifting column (522) is slidably arranged inside the sleeve (523); an expansion assembly (524) is mounted inside the sleeve (523); a plurality of strip grooves (5231) are formed through the inside of the sleeve (523); the expansion assembly (524) comprises a strip air bag (5242) mounted inside the strip groove (5231) and an annular air bag (5241) fixedly mounted inside the sleeve (523); the annular air bag (5241) is connected to the plurality of strip air bags (5242).

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