Roof cantilever structure formwork supporting system

Abstract

The utility model discloses a roof cantilever structure formwork supporting system which can provide stable support for construction of a cantilever structure in the air and guarantee the safety of the construction of the cantilever structure. The roof cantilever structure formwork supporting system comprises a cantilever main beam, a cantilever supporting frame, a first interlayer supporting frame, a second interlayer supporting frame and a pull rod assembly, the cantilever main beam is arranged on the N-1 layer, the cantilever supporting frame is arranged on the cantilever main beam and extends upwards to a framework layer, the first interlayer supporting frame is arranged between the N-1 layer and the N layer, and the second interlayer supporting frame is arranged between the N-1 layer and the N layer. The first interlayer supporting frame is arranged between the N layer and the framework layer, the second interlayer supporting frame is arranged between the N layer and the framework layer, the cantilever supporting frame is connected with the first interlayer supporting frame and further connected with the second interlayer supporting frame, and the pull rod assembly is used for connecting the cantilever main beam and the N layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to building engineering technical field especially, relate to a roof overhanging structure formwork support system. BACKGROUND

[0002] House building usually sets up the frame layer on the roof, the frame layer is generally concrete frame structure, and there is the overhanging structure that overhangs the roof, because the construction of overhanging structure is aerial construction, there is safety risk in the construction process. The construction of overhanging structure usually uses scaffold as formwork support, because overhanging structure is aerial construction, the erection of scaffold has difficulty, and its stability will be influenced, and, in the work of scaffold, the pressure from formwork, overhanging structure concrete will also be borne, and the insufficient overturning resistance of scaffold will seriously affect the construction of overhanging structure, lead to the emergence of safety accident. Therefore, how to set up the formwork support structure of overhanging structure and guarantee the safety of overhanging structure construction is the problem that is considered in the erection process of formwork support structure. SUMMARY

[0003] One of the purposes of the utility model at least is to provide a roof overhanging structure formwork support system, which can provide stable support for the construction of overhanging structure in the air and guarantee the safety of overhanging structure construction.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme including the following aspects.

[0005] A roof overhanging structure formwork support system, comprising: an overhanging main beam, an overhanging support frame, an interlayer support frame one, an interlayer support frame two and a pull rod assembly, wherein the overhanging main beam is arranged at N-1 layer, the overhanging support frame is arranged on the overhanging main beam and extends upward to the frame layer, the interlayer support frame one is arranged between N-1 layer and N layer, the interlayer support frame two is arranged between N layer and the frame layer, the overhanging support frame is connected with the interlayer support frame one, the overhanging support frame is also connected with the interlayer support frame two, and the pull rod assembly is used to connect the overhanging main beam and N layer.

[0006] Preferably, one or more adjustable positioning piles are arranged on the overhanging main beam, the adjustable positioning pile comprises an adjustable base and a positioning pile, the adjustable base comprises a horizontal part, a bent part and an adjusting part, one end of the horizontal part is integrally connected with the bent part, the other end of the horizontal part is hinged with the adjusting part, a connecting hole is arranged on the adjusting part, and the positioning pile is vertically arranged on the top of the horizontal part and is fixedly connected with the horizontal part.

[0007] Preferably, the cantilever main girder adopts an I-beam, and one or more positioning bolts are vertically arranged at the bottom of the upper flange plate of the cantilever main girder and located at one side of the web of the cantilever main girder, and the adjusting part is connected with the positioning bolt through a nut.

[0008] Preferably, the pull rod assembly comprises a first pull rod, a second pull rod and a nut assembly, the first pull rod and the second pull rod are connected through the nut assembly; the first pull rod is connected with the cantilever main girder, and the second pull rod is connected with the N layers.

[0009] Preferably, one end of the first pull rod is provided with a pull ring, and the other end is provided with a wire head; one end of the second pull rod is provided with a pull ring, and the other end is provided with a wire head; the nut assembly comprises two adjusting nuts which are parallel to each other, and the two adjusting nuts are connected through connecting ribs, a plurality of connecting ribs are uniformly arranged along the circumference of the adjusting nut, and the two ends of the connecting rib are respectively welded with the adjusting nut.

[0010] Preferably, the cantilever support frame comprises a plurality of rows of vertical rods arranged along the length direction of the cantilever main girder, the bottom of each row of vertical rods is connected with a corresponding adjustable positioning pile, each row of vertical rods extends to the frame layer in the height direction, the plurality of rows of vertical rods are connected through horizontal rods, and the plurality of rows of horizontal rods are arranged along the height direction of the vertical rods; the horizontal rods extend to the interlayer support frame one and / or the interlayer support frame two and are connected with the cross rods of the interlayer support frame one and / or the interlayer support frame two to form an integral structure.

[0011] Preferably, the cantilever support frame is provided with a temporary edge protection rod at the top of the first row of vertical rods from the outside to the inside, a dense-mesh safety net is connected to the temporary edge protection rod, an operation platform is arranged at the top of the first row of vertical rods and the second row of vertical rods, an adjustable top support is arranged at the top of the vertical rods from the third row to the N-1 layer edge, and a safety pocket net is further arranged between the second row of vertical rods and the third row of vertical rods at the top of the cantilever support frame.

[0012] Preferably, the third row of vertical rods close to the top of the cantilever support frame are connected with the adjacent row of vertical rods through a reinforcing rod, and between the N-1 layer and the N layer, the vertical rods close to the N-1 layer of the cantilever support frame are connected with the vertical rods of the interlayer support frame one through a reinforcing rod.

[0013] Preferably, the cantilever support frame is fully paved with wooden forms close to the bottom position, a formwork is arranged on the top of the wooden forms, and the formwork extends to the N-1 layer floor surface through the cantilever support frame.

[0014] Preferably, a plurality of horizontal scissors braces are arranged in the height direction of the cantilever support frame, and the plurality of horizontal scissors braces are respectively arranged close to the N-1 layer, the N layer and the frame layer; between the N-1 layer and the N layer, an inclined brace is further arranged on the cantilever support frame; and between the N layer and the frame layer, a vertical scissors brace is further arranged on the cantilever support frame.

[0015] In summary, the utility model has at least the following beneficial effects:

[0016] Through setting the overhanging main beam on N-1 layer, the overhanging main beam is connected through the pull rod assembly and N layer, can provide effective support for the erection of the overhanging support frame and the overhanging structure construction of the framework layer, through erecting the overhanging support frame on the overhanging main beam, the overhanging support frame, the interlayer support frame one and the interlayer support frame two are connected into an integral structure, the stability of the overhanging support frame is improved, when the overhanging support frame is used to construct the overhanging structure of the framework layer subsequently, the construction safety of the framework layer can be ensured.

[0017] Through setting the adjustable positioning pile on the overhanging main beam, the vertical rod of the overhanging support frame can be prevented from slipping relative to the overhanging main beam, and the stability of the overhanging support frame is further ensured; the adjustable positioning pile can be detachably arranged at any position in the length direction of the overhanging main beam, and can be stably connected with the positioning bolt on the overhanging main beam, and can also effectively prevent the positioning pile from slipping under external force; the installation of the adjustable positioning pile and the overhanging main beam avoids the punching operation on the overhanging main beam, is favorable for maintaining the integrity of the overhanging main beam structure, improving the supporting effect of the overhanging main beam, and also favorable for the turnover use of the overhanging main beam; using the climbing frame outside the floor as the operation platform for the installation of the overhanging main beam saves the supporting erection work of the overhanging main beam, is favorable for ensuring the safety of the installation of the overhanging main beam, reducing the installation difficulty of the overhanging main beam, and improving the installation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structural schematic diagram of the roof overhanging structure formwork support system of the utility model exemplary embodiment.

[0019] Figure 2 is the structural schematic diagram of the roof overhanging structure formwork support system of another utility model exemplary embodiment.

[0020] Figure 3 is the adjustable positioning pile and the overhanging main beam connection schematic diagram of the utility model exemplary embodiment.

[0021] Figure 4 is another view schematic diagram of the overhanging main beam of the utility model exemplary embodiment.

[0022] Figure 5 is the overhanging main beam and N-1 layer connection schematic diagram of the utility model exemplary embodiment.

[0023] Figure 6 is the overhanging main beam and the beam connection schematic diagram of the utility model exemplary embodiment.

[0024] Figure 7 is the pull rod assembly structure schematic diagram of the utility model exemplary embodiment.

[0025] Figure 8 is Figure 7 the pull rod assembly 2-2 cross-sectional view.

[0026] Figure 9 is the first pull rod structure schematic diagram.

[0027] Figure 10 is the first pull rod and cantilever girder connecting structure schematic diagram of the exemplary embodiment of the utility model.

[0028] Figure 11 is the second pull rod and N layer connecting structure schematic diagram of the exemplary embodiment of the utility model.

[0029] Figure 12 is the second pull rod and another N layer connecting structure schematic diagram of the exemplary embodiment of the utility model.

[0030] Figure 13 is the first pull rod and cantilever girder connecting structure schematic diagram of another exemplary embodiment of the utility model.

[0031] Figure 14 is another structure schematic diagram of the first pull rod.

[0032] In the drawing, 1 is cantilever girder, 101 is connecting steel plate, 102 is positioning bolt, 103 is lifting lug, 104 is pin bolt, 105 is pin bolt anti-unclamping, 2 is cantilever support frame, 201 is vertical rod, 202 is horizontal rod, 203 is adjustable support, 204 is safety net, 205 is hard protection, 206 is reinforcing rod, 207 is horizontal scissors support, 208 is vertical scissors support, 209 is inclined support, 3 is interlayer support frame one, 4 is interlayer support frame two, 5 is pull rod assembly, 501 is first pull rod, 502 is second pull rod, 503 is nut assembly, 5031 is adjusting nut, 5032 is connecting rib, 6 is adjustable positioning pile, 601 is adjustable base, 602 is positioning pile, 6011 is horizontal part, 6012 is bending part, 6013 is adjusting part, 7 is N-1 layer, 8 is N layer, 9 is frame layer, 10 is cantilever structure, 11 is edge protection rod, 12 is operation platform, 13 is close-mesh safety net, 14 is beam connection, 15 is split pin, 16 is sleeve, 17 is connecting sheet. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail in combination with the drawings and embodiments, so that the purpose, technical scheme and advantages of the utility model are more clear and explicit. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0034] Reference Figure 1The roof overhanging structure template support system of the exemplary embodiment of the utility model includes overhanging main beam 1, overhanging support frame 2, interlayer support frame one 3, interlayer support frame two 4 and pull rod assembly 5, wherein overhanging main beam 1 is arranged on the edge beam or wall body of N-1 layer 7 (N layer represents the roof layer, and N-1 layer represents the next layer of the roof layer), overhanging support frame 2 is arranged on overhanging main beam 1 and extends upwards to frame layer 9, interlayer support frame one 3 is arranged between N-1 layer 7 and N layer 8, interlayer support frame two 4 is arranged between N layer 8 and frame layer 9, overhanging support frame 2 is connected with interlayer support frame one 3, overhanging support frame 2 is also connected with interlayer support frame two 4, and pull rod assembly 5 is used for connecting overhanging main beam 1 and N layer 8.

[0035] Overhanging main beam 1 and pull rod assembly 5 can provide stable support for overhanging support frame 2, guarantee the stability of overhanging support frame 2, after interlayer support frame one 3, interlayer support frame two 4 and overhanging support frame 2 are connected into an integral structure, the stability of overhanging support frame 2 can be further guaranteed, and when the template of overhanging structure 10 and overhanging structure 10 are constructed subsequently, the safety of high-altitude operation is effectively guaranteed.

[0036] Overhanging main beam 1 adopts I-shaped steel, one end of overhanging main beam 1 is provided with connecting steel plate 101 (Q235 steel plate is adopted), overhanging main beam 1 is connected on the outer wall of N-1 layer 7 through connecting steel plate 101 and high-strength bolts (for reference Figure 1 、 Figure 4 、 Figure 5 ), overhanging main beam 1 is uniformly arranged along the circumference of the outer wall of N-1 layer 7, overhanging main beam 1 is arranged obliquely at the sun angle part of N-1 layer 7, adjacent overhanging main beam 1 is connected through beam 14 (16# I-shaped steel is adopted), for reference Figure 6 , beam 14 is connected with overhanging main beam 1 through U-shaped hoop. The length of overhanging main beam 1 is 1.5m~2.9m (the specific length is determined according to the overhanging length of the overhanging structure), one or more lifting lugs 103 for connecting pull rod assembly 5 are arranged on the top of overhanging main beam 1, the distance between lifting lug 103 and the end of overhanging main beam 1 and the distance between adjacent lifting lugs 103 are determined according to the length of overhanging main beam 1, and the included angle between pull rod assembly 5 and overhanging main beam 1 is 45~60 degrees.

[0037] One or more adjustable positioning piles 6 are arranged on overhanging main beam 1, adjustable positioning pile 6 is used for positioning the position of vertical rod 201 of overhanging support frame 2 and preventing vertical rod 201 from slipping, thereby guaranteeing the stability and safety of overhanging support frame 2, and the number of adjustable positioning piles 6 is determined according to the number of vertical rods 201 of overhanging support frame 2. For reference Figure 1 、 Figure 3The adjustable positioning pile 6 includes an adjustable base 601 and a positioning pile 602. The adjustable base 601 includes a horizontal part 6011, a bent part 6012, and an adjusting part 6013. One end of the horizontal part 6011 is integrally connected to the bent part 6012, and the other end of the horizontal part 6011 is hinged to the adjusting part 6013 (e.g., connected by a hinge). The adjusting part 6013 is provided with a connecting hole. The positioning pile 602 is vertically set on the top of the horizontal part 6011 and fixedly connected to the horizontal part 6011. One or more positioning bolts 102 are vertically set at the bottom of the upper flange plate of the cantilever main beam 1 (the distance between adjacent positioning bolts is determined according to the design and construction requirements). The positioning bolts 102 are set on the flange plate on one side of the web plate. The top is welded to the bottom of the flange plate, and the adjusting part 6013 is connected to the positioning bolt 102 by a nut. When installing the adjustable positioning pile 6 on the cantilever main beam 1, the flange plate at the top of the cantilever main beam 1 is inserted between the horizontal part 6011 and the bent part 6012. The adjusting part 6013 is rotated so that the connecting hole on the adjusting part 6013 passes through the positioning bolt 102, and then the nut is inserted into the positioning bolt 102 to fix the cantilever main beam 1 and the adjusting part 6013 together, thus completing the connection between the adjustable positioning pile 6 and the cantilever main beam 1. When it is necessary to adjust the position of the adjustable positioning pile 6, the nut is removed, and the adjusting part 6013 is unscrewed from the positioning bolt 102, allowing the adjustable positioning pile 6 to slide along the cantilever main beam 1 to adjust its position. The horizontal part 6011, the bent part 6012, and the adjusting part 6013 can all be made of steel plate, and the bent part 6012 is formed by bending one end of the horizontal part 6011.

[0038] The cantilever support frame 2 includes multiple rows of uprights 201 (at least three rows, the specific number of rows is determined according to the length of the cantilever structure 10) arranged along the length of the cantilever main beam 1. Figure 2 (This shows more rows of uprights for construction of longer cantilever structures). The bottom of each row of uprights 201 is connected to the corresponding adjustable positioning piles 6 on the cantilever main beam 1 to ensure accurate row spacing of the uprights 201 and prevent slippage of the uprights 201, thus ensuring the stability of the cantilever support frame 2. Each row of uprights 201 extends to the frame layer 9 in the height direction. Multiple rows of uprights 201 are connected by horizontal bars 202 (including transverse horizontal bars and longitudinal horizontal bars). Multiple rows of horizontal bars 202 are set along the height direction of the uprights 201, and the distance between adjacent rows of horizontal bars 202 is 1. 3~1.5m, near the top or bottom of the upright 201, adjust the distance between the horizontal bar 202 and the top or bottom of the upright 201; when the horizontal bar 202 is located between the N-1 layer 7 and the N layer 8, each row of horizontal bars 202 extends from the upright 201 to the inter-layer support frame 1 3 and is connected with the horizontal bar of the inter-layer support frame 1 3 to form an integral structure; when the horizontal bar 202 is located between the N layer 8 and the frame layer 9, each row of horizontal bars 202 extends from the upright 201 to the inter-layer support frame 2 4 and is connected with the horizontal bar of the inter-layer support frame 2 4 to form an integral structure.

[0039] The first row of vertical poles 201 of the overhanging support frame 2 is provided with a parapet 11 at the top, and a close-mesh safety net 13 is connected to the parapet 11. The first row of vertical poles 201 and the second row of vertical poles 201 are provided with an operation platform 12 (which can be fully paved with steel mesh or laid with platform plates) at the top. The top of the vertical poles 201 from the third row to the N-1 layer 7 of the edge is provided with an adjustable top support 203 for supporting the formwork of the overhanging structure 10. The second row of vertical poles 201 and the third row of vertical poles 201 at the top of the overhanging support frame 2 are also provided with a safety net 204 to ensure the safety of the construction of the overhanging structure 10 of the framework layer 9.

[0040] The overhanging structure 10 is 0.4-2m long, and includes a first overhanging beam and a second overhanging beam perpendicular to each other. One end of the first overhanging beam is connected to the cross beam of the framework layer 9, and the other end is connected to the second overhanging beam. The third row of vertical poles 201 near the top of the overhanging support frame 2 is connected to the adjacent row of vertical poles 201 through a reinforcing rod 206 to further improve the stability of the support of the second overhanging beam and the bottom formwork. Between the N-1 layer 7 and the N layer 8, the vertical poles 201 of the overhanging support frame 2 near the N-1 layer 7 and the vertical poles of the interlayer support frame 1 are connected through a reinforcing rod 206 to further improve the stability of the connection between the overhanging support frame 2 and the interlayer support frame 1 and the overall stability of the overhanging support frame 2.

[0041] The overhanging support frame 2 is fully paved with wooden frames near the bottom, and a formwork is laid on the top of the wooden frames. The formwork extends from the overhanging support frame 2 to the floor of the N-1 layer 7. The wooden frames and the formwork serve as a hard protection 206 to improve the stability of the overhanging support frame 2 and prevent objects from falling to ensure construction safety. The overhanging support frame 2 is provided with multiple horizontal scissor braces 207 in the height direction. The horizontal scissor braces 207 are respectively arranged near the N-1 layer 7, the N layer 8, and the framework layer 9, and are respectively connected to the overhanging support frame 2 and the interlayer support frame 1, the overhanging support frame 2 and the interlayer support frame 2. Between the N-1 layer 7 and the N layer 8, the overhanging support frame 2 is also provided with an inclined brace 209. Between the N layer 8 and the framework layer 9, the overhanging support frame 2 is also provided with a vertical scissor brace 208 connected to the overhanging support frame 2 and the interlayer support frame 2 to improve the overall stability of the overhanging support frame 2 and ensure the construction safety of the formwork and the overhanging structure 10 of the framework layer 9.

[0042] Reference Figures 7-9The tie rod assembly 5 includes a first tie rod 501, a second tie rod 502, and a nut assembly 503. One end of the first tie rod 501 has a pull ring, and the other end has a threaded end (350-400mm long). Similarly, one end of the second tie rod 502 has a pull ring, and the other end has a threaded end (350-400mm long). The nut assembly 503 includes two parallel adjusting nuts 5031 connected by connecting ribs 5032. Multiple connecting ribs 5032 are evenly arranged circumferentially around the adjusting nuts 5031, and both ends of the connecting ribs 5032 are welded to the adjusting nuts 5031. The first tie rod 501 is connected to one adjusting nut 5031 of the nut assembly 503 via a threaded end, and the second tie rod 502 is connected to the other adjusting nut 5031 of the nut assembly 503 via a threaded end. The first tie rod 501 is connected to the lifting lug 103 of the cantilever main beam 1 via a pull ring (see reference). Figure 10 The second tie rod 502 is connected to the N-layer 8 via a pull ring. A cotter pin 15 is detachably installed on the side beam or wall of the N-layer 8, and the cotter pin 15 is detachably connected to the second tie rod 502 (see reference). Figure 11 , Figure 12 ).

[0043] The first tie rod 501 can also be connected to the lifting lug 103 of the cantilever main beam 1 via the connecting piece 17, see reference. Figure 13 When the length of the tie rod assembly 5 is less than the preset length requirement, a connecting piece 17 can be used as an extension structure to ensure that the tie rod assembly 5 meets the usage requirements. The connecting piece 17 is made of steel and has through holes near both ends. The connecting piece 17 is connected to the U-shaped lug 103 at the top of the cantilever main beam 1 via a pin 104 and an anti-disengagement buckle. The connecting piece 17 is also welded or bolted to the first tie rod 501. When the connecting piece 17 is welded to the first tie rod 501, the pull ring of the first tie rod 501 is replaced with a plate-like structure. (Refer to...) Figure 14 The thickness of the sheet structure is equal to the diameter of the first tie rod 501. The sheet structure is integrally formed with the first tie rod 501, replacing the pull ring of the first tie rod 501 with the sheet structure. Welding the sheet structure and the connecting piece 17 can increase the contact area of ​​the connection between the first tie rod 501 and the connecting piece 17, preventing damage to the connection between the first tie rod 501 and the connecting piece 17, thereby increasing the reliability of the connection between the first tie rod 501 and the connecting piece 17, and enabling the tie rod assembly 5 to effectively tie the cantilever main beam 1.

[0044] The method for constructing a cantilevered roof structure using the aforementioned roof cantilever structure formwork support system includes the following steps:

[0045] Step one, when the floor construction reaches the N-1 layer 7, embed the sleeve 16 (preferably PVC threaded sleeve with a diameter of 25 mm) at the preset position of the edge beam or wall of the layer, the sleeve 16 of the layer penetrates the edge beam or wall, and the distance between the center line of the sleeve 16 and the top surface of the N-1 layer 7 is 250-300 mm; when the construction reaches the N layer 8, embed the sleeve 16 or sleeve group (including two sleeves) at the preset position of the edge beam or wall of the layer, the distance between the center line of the sleeve 16 and the top surface of the N layer 8 is 150-250 mm, the sleeve 16 is laterally offset from the vertical rod 50-100 mm of the cantilever support frame 2, the sleeve 16 of the layer can penetrate the edge beam or wall or be in the edge beam or wall, when it is in the edge beam or wall, the length of the sleeve 16 extending into the edge beam or wall is 150-180 mm, the diameter of the end of the sleeve 16 located in the edge beam or wall is larger than that of the other end to prevent the sleeve 16 from exiting from the edge beam or wall; when embedding the sleeve group, the lateral distance between the two sleeves 16 of the sleeve group is 100-120 mm. Before embedding the sleeve 16, set a horizontal line at the preset position of the edge beam or wall of the corresponding layer to embed the sleeve 16 at a uniform height, and close the port of the sleeve 16 to prevent concrete or other debris from entering the sleeve 16, during the embedding of the sleeve 16, according to the preset embedding position of the sleeve 16, bind the sleeve 16 and the steel bars in the edge beam or wall firmly to prevent the sleeve 16 from being deviated during the concrete vibrating process. In the implementation process, the distance between the N-1 layer 7 and the N layer 8 is 3.1 m, and the distance between the N layer 8 and the framework layer 9 is 4.3 m.

[0046] Step two, when the main structure of the framework layer 9 is completed and the concrete (C30 concrete) of the N-1 layer 7 has a strength of not less than 20 MPa, remove part of the climbing frame protection mesh at the N-1 layer 7.

[0047] Step three, use the climbing frame as the operation platform, install the cantilever main beam 1 on the periphery of the N-1 layer 7; install a cantilever main beam 1 (preferably 16# I-beam) every 1~1.5m, when the length of the cantilever main beam 1 is greater than 1.8m, install two lifting lugs 103 on the cantilever main beam 1, the position of each lifting lug 103 is determined according to the design position, and the working angle of the pull rod assembly 5 is ensured to be 45~60 degrees when the pull rod assembly 5 is installed on the cantilever main beam 1. During the installation of the cantilever main beam 1, high-strength bolts with a diameter of 20mm and a strength grade of A8.8 are inserted into the sleeve 16 of the N-1 layer 7, the bolt holes arranged in the shape of an isosceles triangle on the connecting steel plate 101 are passed through the corresponding high-strength bolts, and then steel washers and double nuts are respectively inserted into the two ends of the high-strength bolts, so that the cantilever main beam 1 is installed at the predetermined position of the N-1 layer 7; after the installation of the cantilever main beam 1, the adjacent cantilever main beams 1 are connected by using the beam connector 14 at the external corner position. When the cantilever main beam 1 is installed, the outer end of the cantilever main beam 1 (the end of the cantilever main beam 1 opposite to the connecting steel plate 101) is inclined upward by 2cm, and after the installation of the cantilever support frame 2, the downward phenomenon of the outer end of the cantilever main beam 1 can be avoided.

[0048] Step four, remove the climbing frame from the N-1 layer 7 to the frame layer 9, and when the strength of the concrete (C30 concrete) of the N layer 8 is not less than 20MPa, connect the cantilever main beam 1 and the N layer 8 by using the pull rod assembly 5; the overall length of the pull rod assembly 5 is determined according to the height from the N-1 layer 7 to the N layer 8 and the length of the cantilever main beam 1, and the number of the pull rod assembly 5 is determined according to the length of the cantilever main beam 1; the first pull rod 501 and the second pull rod 502 are both made of round steel (HB300) with a diameter of 20mm, the adjusting nut 5031 is made of 45# steel and has a size of M50, and the connecting rib 5032 is made of steel bar with a diameter of 14mm; after the pull rod assembly 5 is tightened, the lengths of the first pull rod 501 and the second pull rod 502 inserted into the nut assembly 503 are both not less than 60mm, so as to ensure the stability of the pull rod assembly structure.

[0049] When the pull rod assembly 5 is installed, the split pin 15 is installed in the sleeve 16 pre-buried in the N layer 8, the pull ring of the second pull rod 502 is connected with the split pin 15 of the N layer 8 by using the pin bolt 104 and the anti-unclamping device, the nut assembly 503 is screwed into the second pull rod 502 from the wire end of the second pull rod 502 until the nut assembly 503 is rotated to the limit position of the wire end, the first pull rod 501 is screwed into the nut assembly 503 through the wire end, the adjusting nut assembly 503 is adjusted until the pull ring of the first pull rod 501 is aligned with the lifting lug 103 on the cantilever main beam 1, the pull ring of the first pull rod 501 is connected with the lifting lug 103 by using the pin bolt 104 and the anti-unclamping device, the tightness of the pull rod assembly 5 is checked, and the adjusting nut assembly 503 is adjusted to ensure that the first pull rod 501 and the second pull rod 502 are uniformly stressed under tension.

[0050] Step five, erect the cantilever support frame 2 on the cantilever main beam 1, connect the cantilever support frame 2, the first interlayer support frame 3 and the second interlayer support frame 4 into an integral structure, and extend the cantilever support frame 2 upward to the preset position of the framework layer.

[0051] Before installing the cantilever support frame 2, determine the installation position of each row of vertical rods 201 on the cantilever main beam 1 according to the number of rows of vertical rods 201 of the cantilever support frame 2 and the distance between adjacent rows of vertical rods 201, and then install the adjustable positioning pile 6 at the determined installation position to prevent the vertical rods 201 from slipping and ensure the stability of the structure of the cantilever support frame 2. The installation process of the adjustable positioning pile 6 includes: rotating the adjustment part 6013 to make the horizontal part 6011 and the bent part 6012 engage with the flange plate at the top of the cantilever main beam 1, rotating the adjustment part 6013 to make the connecting hole of the adjustment part 6013 pass through the positioning bolt 102 at the bottom of the flange plate, and then screwing the nut into the positioning bolt 102 to clamp the adjustment part 6013 and the flange plate; after the adjustable positioning pile 6 is installed, connect the vertical rods 201 of the cantilever support frame 2 and the positioning pile 602 of the adjustable positioning pile 6 (the vertical rods can be inserted into the positioning pile, or other connection methods can be used), install the cantilever support frame 2, and connect the cantilever support frame 2, the first interlayer support frame 3 and the second interlayer support frame 4 into an integral structure.

[0052] Step six, erect the formwork of the cantilever structure 10 at the preset position at the top of the cantilever support frame 2; the formwork of the cantilever structure 10 includes a first cantilever beam formwork and a second cantilever beam formwork, and each of the first cantilever beam formwork and the second cantilever beam formwork includes a beam bottom form and a beam side form. Before installing the formwork of the cantilever structure 10, install the adjustable top support 203 at the top of the vertical column at the edge of the third row to the N-1 layer 7, adjust the height of each adjustable top support 203 respectively, install the beam bottom form support one on the corresponding adjustable top support 203 of the first cantilever beam, install the beam bottom form support two on the corresponding adjustable top support 203 of the second cantilever beam, then install the beam bottom form and the beam side form of the first cantilever beam on the beam bottom form support one, install the beam bottom form and the beam side form of the second cantilever beam on the beam bottom form support two, and connect the beam bottom form of the first cantilever beam and the beam side form of the second cantilever beam. When the overall length of the cantilever structure 10 is not greater than 0.6 m, the beam side form of the first cantilever beam and the beam side form of the second cantilever beam are made into an integral structure, and the beam bottom form of the first cantilever beam and the beam bottom form of the second cantilever beam are made into an integral structure (or the beam bottom form of the main structure of the framework layer is used as the beam bottom form of the second cantilever beam). Due to the short length of the cantilever structure 10, only the second beam bottom form support two can be provided, and the formwork support on the second interlayer support frame 4 is used as the formwork support of the first cantilever beam.

[0053] Step seven, pour concrete into the space surrounded by the formwork to form the cantilever structure 10.

[0054] In the above process, when the concrete strength of the cantilever structure 10 reaches 100% of the design strength, the formwork of the cantilever structure 10, the adjustable top support 203, the cantilever support frame 2 and the cantilever main beam 1 are sequentially removed.

[0055] The above merely describes the detailed description of the specific implementation of the present application, and is not a limitation of the present application. Various substitutions, modifications and improvements made by those skilled in the related technical field without departing from the principles and scope of the present application shall be included in the protection scope of the present application.

Claims

1. A roof overhang formwork support system characterised in that, The utility model relates to a kind of cantilevered frame structures, including: Cantilevered main girder (1), cantilevered support frame (2), interlayer support frame one (3), interlayer support frame two (4) and pull rod assembly (5), wherein the cantilevered main girder (1) is arranged at N-1 layer (7), the cantilevered support frame (2) is arranged on cantilevered main girder (1), and it is extended to frame layer (9) upwards, the interlayer support frame one (3) is arranged between N-1 layer (7) and N layer (8), the interlayer support frame two (4) is arranged between N layer (8) and frame layer (9), the cantilevered support frame (2) is connected with interlayer support frame one (3), the cantilevered support frame (2) is also connected with interlayer support frame two (4), and the pull rod assembly (5) is used to connect cantilevered main girder (1) and N layer (8).

2. The roofing overhang structural formwork support system according to claim 1, wherein, One or more adjustable positioning piles (6) are provided on the cantilevered main girder (1), the adjustable positioning pile (6) includes an adjustable base (601) and a positioning pile (602), the adjustable base (601) includes a horizontal part (6011), a bent part (6012) and an adjusting part (6013), one end of the horizontal part (6011) is integrally connected with the bent part (6012), the other end of the horizontal part (6011) is hinged with the adjusting part (6013), the adjusting part (6013) is provided with a connecting hole, and the positioning pile (602) is vertically arranged at the top of the horizontal part (6011) and is fixedly connected with the horizontal part (6011).

3. The roofing overhang formwork support system according to claim 2, wherein, The cantilevered main girder (1) is made of an I-shaped steel, one or more positioning bolts (102) are vertically arranged at the bottom of the upper flange plate of the cantilevered main girder (1), the positioning bolt (102) is located on one side of the web of the cantilevered main girder (1), and the adjusting part (6013) is connected with the positioning bolt (102) through a nut.

4. The roofing overhang formwork support system according to claim 1, wherein, The pull rod assembly (5) includes a first pull rod (501), a second pull rod (502) and a nut assembly (503), the first pull rod (501) and the second pull rod (502) are connected through the nut assembly (503), the first pull rod (501) is connected with the cantilevered main girder (1), and the second pull rod (502) is connected with the N layer (8).

5. The roofing overhang formwork support system according to claim 4, wherein, One end of the first pull rod (501) is provided with a pull ring, the other end is provided with a silk head, one end of the second pull rod (502) is provided with a pull ring, the other end is provided with a silk head, the nut assembly (503) includes two mutually parallel adjusting nuts (5031), the two adjusting nuts (5031) are connected through a connecting rib (5032), a plurality of connecting ribs (5032) are evenly arranged along the circumference of the adjusting nut (5031), and the two ends of the connecting rib (5032) are respectively welded with the adjusting nut (5031).

6. The roofing overhang structural formwork support system according to claim 1, wherein, The overhanging support frame (2) comprises multiple rows of vertical rods (201) arranged along the length direction of the overhanging main beam (1), the bottom of each row of the vertical rods (201) is connected with a corresponding adjustable positioning pile (6), each row of the vertical rods (201) extends to the frame layer (9) in the height direction, the multiple rows of vertical rods (201) are connected through horizontal rods (202), and the multiple rows of horizontal rods (202) are arranged along the height direction of the vertical rods (201); the horizontal rods (202) extend to the interlayer support frame one (3) and / or the interlayer support frame two (4) and are connected with horizontal rods of the interlayer support frame one (3) and / or the interlayer support frame two (4) to form an integral structure.

7. The roofing overhang formwork support system according to claim 6, wherein, The overhanging support frame (2) is provided with a temporary edge protection rod (11) at the top of the first row of vertical rods (201) from the outside to the inside, the temporary edge protection rod (11) is connected with a dense-mesh safety net (13), the top of the first row of vertical rods (201) and the second row of vertical rods (201) is provided with an operation platform (12), the top of the vertical rods (201) from the third row to the edge of the N-1 layer (7) is provided with an adjustable top support (203), and the second row of vertical rods (201) and the third row of vertical rods (201) at the top of the overhanging support frame (2) are further provided with a safety net (204).

8. The roofing overhang formwork support system according to claim 7, wherein, The third row of vertical rods (201) close to the top of the overhanging support frame (2) is connected with the adjacent row of vertical rods (201) through a reinforcing rod (206), and between the N-1 layer (7) and the N layer (8), the vertical rods (201) close to the N-1 layer (7) of the overhanging support frame (2) are connected with the vertical rods of the interlayer support frame one (3) through the reinforcing rod (206).

9. The roofing overhang formwork support system according to claim 1, wherein, The overhanging support frame (2) is fully paved with wooden frames at a position close to the bottom, and a formwork is arranged on the top of the wooden frames, and the formwork extends to the N-1 layer (7) floor through the overhanging support frame (2).

10. The roof overhang formwork support system according to any one of claims 1 to 9, wherein, Multiple horizontal scissors braces (207) are arranged in the height direction of the overhanging support frame (2), the horizontal scissors braces (207) are arranged close to the N-1 layer (7), the N layer (8) and the frame layer (9) respectively, a diagonal brace (209) is further arranged on the overhanging support frame (2) between the N-1 layer (7) and the N layer (8), and a vertical scissors brace (208) is further arranged on the overhanging support frame (2) between the N layer (8) and the frame layer (9).

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