Supporting and protecting system applied to construction of cantilever beam plate of high-rise roof

Abstract

The utility model discloses a supporting and protecting system applied to construction of a cantilever beam plate of a high-rise roof. The supporting and protecting system comprises a plurality of cantilever I-shaped steel beams installed on a secondary top layer, a formwork supporting frame on the I-shaped steel beams and a protecting frame arranged on the top of the formwork supporting frame. Overhanging parts of the I-shaped steel beams are fully paved with springboards, and large-mesh nets are erected below the springboards; steel wire ropes are adopted to tie the I-shaped steel beams and the top layer; the formwork supporting frame is installed on the overhanging part of the I-shaped steel beam. The formwork supporting frame upwards passes through the outer side of the top layer to reach the plate bottom of the roof cantilever. The vertical rod on the outermost side of the formwork supporting frame extends upwards to the position above the roof and is connected with an anchor ring pre-arranged on the roof in a pulling mode through an inclined supporting rod to form a protection frame. The supporting and protecting frame is suitable for supporting and protecting construction of the cantilever beam plate of the high-rise roof, installation and construction are convenient, stability is good, and the I-shaped steel and the supporting and protecting frame body are convenient and fast to detach after construction is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a support and protection system applied to the construction of cantilever beam and slab on the high-rise roof. Background Technique

[0002] For high-rise buildings, the specific construction often has various construction difficulties due to different specific structural settings of the buildings. For example, for the design of a cantilever on the roof of a high-rise building, it has been adopted by some buildings in recent years due to its aesthetics and practicality. Since the cantilever is at a relatively high position from the ground (such as 50 meters or more) and is located on the roof, the attached lifting scaffold cannot reach the roof, and the support and protection erection before and after the casting of the cantilever roof has become the key and difficult points of the construction. Moreover, the demolition of the support and protection system after the construction is also a construction difficulty. Summary of the Invention

[0003] Based on the above technical problems, the purpose of the utility model is to provide a support and protection system applied to the construction of cantilever beam and slab on the high-rise roof, and the purpose of the utility model is achieved by the following technical means:

[0004] A support and protection system applied to the construction of cantilever beam and slab on the high-rise roof, the high-rise includes a roof, a top floor and a sub-top floor from top to bottom, and includes a plurality of cantilever I-shaped steel beams arranged longitudinally and parallelly on the upper part of the sub-top floor, a formwork support frame installed on the I-shaped steel beams, and a protection frame arranged on the top of the formwork support frame; a part of the I-shaped steel beam is an anchoring part anchored on the sub-top floor, and the other part is a cantilever part cantilevered out of the sub-top floor structure; the upper part of the cantilever part of the I-shaped steel beam is fully covered with springboards, and a large-mesh safety net is erected below; a steel wire rope is used to tie the cantilever part of the I-shaped steel beam to a lifting ring installed on the top floor.

[0005] The bottom of the formwork support frame is installed on the cantilever part of the I-shaped steel beam, and is tied to anchor rings preset on the top floor and the sub-top floor through diagonal braces; the formwork support frame extends upward through the outside of the top floor to the bottom of the cantilever slab on the roof; the outermost vertical pole of the formwork support frame extends upward above the roof and is tied to an anchor ring preset on the non-cantilever structure on the roof through a diagonal brace to form the protection frame.

[0006] For further optimization, the formwork support frame is a steel pipe fastener type frame body, including vertical poles, longitudinal horizontal bars, transverse horizontal bars and scissors braces. Reinforcing bar heads are welded on the cantilever part of the I-shaped steel beam according to the transverse spacing of the vertical poles, the steel pipes of the vertical poles are inserted on the reinforcing bar heads and then spot-welded to the I-shaped steel beam, and a dense mesh safety net is hung outside the outermost vertical pole of the formwork support frame.

[0007] Furthermore, the outermost vertical pole of the formwork support frame extends upward 1.4 - 1.6 m above the parapet on the roof.

[0008] Furthermore, a top support is provided on the top of each upright pole except the outermost upright pole of the formwork support frame, a horizontal steel pipe is provided on the upper part of the top support, a longitudinal horizontal square steel pipe is provided between the transverse steel pipe and the bottom of the cantilevered roof plate, and a formwork is provided on the upper part of the square steel pipe; a longitudinal horizontal rod of the facade is provided in the outermost upright pole of the formwork support frame, and the formwork is supported at the position between the upper part of the second outermost upright pole and the longitudinal horizontal rod of the facade.

[0009] Furthermore, the I-beam is anchored on the sub-top layer in the following manner: a vertically detachable sleeve is pre-embedded in the sub-top layer before the beam and slab concrete is poured; after pouring, the detachable bolt is inserted into the detachable sleeve; the I-beam is arranged on the sub-top layer beam and slab concrete and its cross section is located between two detachable bolts; a steel plate is arranged on the upper part of the I-beam, and a nut is provided above the steel plate for tightening, with no less than 3 complete threads exposed; and the gap between the I-beam and the two detachable bolts is plugged with a wedge.

[0010] Furthermore, when a steel wire rope is used to tie the cantilevered portion of the I-beam to the lifting ring installed on the top floor, the bottom of the cantilevered portion of the I-beam is fully welded on both sides, and 100mm horizontal steel bars extend outward on both sides for the installation of the steel wire rope; the steel wire rope is clamped by a plurality of special steel wire rope clamps.

[0011] The advantages and beneficial effects of the utility model are:

[0012] The present invention adopts I-beam cantilever support for the upper beam slab casting construction and sets up support frame and protection frame, which can well solve the construction support and protection of the cantilever beam slab of high-rise roof. It is convenient to install and construct, has good stability, and the I-beam and support and protection frame are easy to disassemble after the construction is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a cross-sectional diagram of the support and protection system of the utility model;

[0015] Figure 2 This is a plan view of the support and protection system of the utility model (second top floor);

[0016] Figure 3 Schematic diagram of the protective frame structure;

[0017] Figure 4 Schematic diagram of the anchor structure for installing the I-beam;

[0018] Figure 5 Schematic diagram of the wire rope tie structure of the I-beam.

[0019] Reference numerals:

[0020] 1, Roof; 2, Top floor; 3, Second top floor; 4, I-shaped steel beam; 5, Formwork support frame; 6, Protection frame; 7, Springboard; 8, Big-eye mesh; 9, Steel wire rope; 10, Suspension ring; 11, Anchor ring; 12, Close-mesh safety net; 13, Diagonal brace; 14, Square steel pipe; 15, Square timber; 16, Demountable sleeve; 17, Demountable bolt; 18, Steel plate; 19, Horizontal steel bar; 20, Special clip for steel wire rope; 21, Wedge wood; 22, Nut; 41, Steel bar head; 511, Outermost vertical pole; 512, Second outermost vertical pole; 521, Exterior longitudinal horizontal bar; A, First pouring position. Detailed implementation mode

[0021] Example 1:

[0022] As Figure 1 , 2 , as shown in Figure 3, a support and protection system applied to the construction of cantilevered beam and slab on the high-rise roof. The high-rise building includes a roof 1, a top floor 2 and a second top floor 3 from top to bottom. There is a cantilever structure on the roof layer, and the cantilever structure is 50 meters above the ground. The support and protection system in this embodiment includes 8 cantilevered I-shaped steel beams 4 (22a# I-shaped steel, with a maximum spacing of 1150 mm) arranged longitudinally and parallelly on the upper part of the second top floor 3, a formwork support frame 5 installed on the I-shaped steel beam 4, and a protection frame 6 arranged on the top of the formwork support frame 5.

[0023] In this embodiment, a part of the I-shaped steel beam 4 is an anchored part (about 3.4 m) anchored on the second top floor 3, and a part is a cantilever part (about 2.6 m) cantilevered outside the structure of the second top floor 3; as Figure 4 shown, the way the I-shaped steel beam 4 is anchored on the second top floor 3 is as follows: Demountable sleeves 16 in the vertical direction are pre-embedded in the second top floor 3 before the concrete pouring of the beam and slab. After pouring, the demountable bolts 17 are inserted into the demountable sleeves 16. The I-shaped steel beam 4 is arranged on the concrete of the beam and slab of the second top floor 3, and its cross-section is located between two demountable bolts 17. A steel plate 18 is arranged on the upper part of the I-shaped steel beam 4, and a nut 22 is arranged above the steel plate 18 and tightened, with no less than 3 complete threads exposed. The gap between the I-shaped steel beam 4 and the two demountable bolts 17 is tightly plugged with wedge wood 21. Installation and disassembly are both very convenient. In this embodiment, the demountable sleeve 16 is a φ25 PVC plastic sleeve, and in this embodiment, the demountable bolt 17 is a φ20 round steel with a threaded sleeve made on the upper part. In this embodiment, the I-shaped steel beam 4 passes through the pouring wall. When installing the I-shaped steel beam 4, it first passes through the wall frame and then the wall is poured.

[0024] The upper part of the cantilever part of the I-shaped steel beam 4 is fully covered with springboards 7, and a big-eye mesh 8 is erected below; a steel wire rope 9 is used to tie the cantilever part of the I-shaped steel beam 4 to the suspension ring 10 installed on the top floor 2; as Figure 5As shown, the tie-in method of this embodiment is as follows: the cantilevered portion of the I-beam 4 is fully welded on both sides at the bottom, with horizontal reinforcement bars 19 extending 100 mm on both sides. The top wall 2 is pre-embedded with a horizontal, removable sleeve 16 before pouring. After pouring, a removable lifting ring 10 is inserted. The lifting ring 10 passes through the wall frame and is secured with bolts and nuts at the end. The steel wire rope 9 is wrapped around the bottom of the I-beam 4 inside the horizontal reinforcement 19 to the top. The ends of the steel wire rope 9 are then clamped together and tightened in sequence by multiple special steel wire rope clamps 20. It is then connected to the lifting ring 10 for tie-in. In this embodiment, the lifting ring is made of φ20 round steel, and the steel wire rope is a 6*19φ18 steel wire rope.

[0025] The bottom of the formwork support frame 5 is installed on the cantilevered part of the I-beam 4 and is connected to the anchor rings 11 preset on the top floor 2 and the second top floor 3 through the diagonal brace 13; the formwork support frame 5 passes upward through the outside of the top floor 2 to reach the bottom of the cantilevered roof 1; Figure 5 As shown, the outermost vertical pole 511 of the formwork support frame 5 and the horizontal pole connected thereto extend upward to above the roof 1 and are tied to the anchor ring 11 preset on the non-cantilevered structure of the roof 1 through the diagonal brace 13 to form the protective frame 6; in this embodiment, the outermost vertical pole 511 of the formwork support frame 5 extends upward to 1.5 m above the parapet 13 above the roof 1.

[0026] In this embodiment, the formwork support frame 5 is a steel pipe fastener-type frame, comprising vertical posts, longitudinal horizontal posts, transverse horizontal posts, and scissor braces. The vertical posts are spaced 1.2m apart, with a step spacing of 1.2m and a row spacing of 0.6m. Three vertical posts are arranged transversely. Rebar heads 41 (Ø20 mm, 200mm long) are welded to the cantilevered portion of the I-beam 4 at the horizontal spacing between the vertical posts. The steel pipes of the vertical posts are inserted onto the rebar heads 41 and then spot-welded to the I-beam 4. A dense safety net 12 is attached to the outermost vertical posts 511 of the formwork support frame 5.

[0027] The top of the formwork support frame 5 is provided with a top support (adjustable support) on the top of the other vertical poles except the outermost vertical pole 511. A horizontal steel pipe is provided on the upper part of the top support. A longitudinal horizontal square steel pipe 14 is provided between the horizontal steel pipe and the bottom of the cantilevered plate of the roof 1, and a formwork is provided on the upper part of the square steel pipe 14; the outermost vertical pole 511 of the formwork support frame 5 is provided with an outer facade longitudinal horizontal rod 521, and the formwork is supported at the position between the upper part of the second outermost vertical pole 512 and the outer facade longitudinal horizontal rod 521.

[0028] Overall construction reference process of this embodiment: steel beam processing → layout positioning → embedding bolt sleeves and anchor rings on the sub-top floor ground → pouring concrete on the sub-top floor ground → installing 22a# I-shaped steel beams after the concrete strength meets the requirements → erecting support frames → embedding wire rope sling ring sleeves before pouring the top floor ground → pouring the top floor ground → installing sling rings and wire ropes and tying them to the I-shaped steel beams → formwork for the roof cantilevered beam slab → erecting protective frames up to the roof layer.

[0029] Finally, it should be noted that the above is only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred layout scheme, those of ordinary skill in the art should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A support and protection system applied to the construction of cantilevered beam and slab on the high-rise roof. The high-rise building includes a roof (1), a top floor (2), and a sub-top floor (3) from top to bottom. It is characterized in that: It includes a plurality of cantilevered I-beams (4) arranged longitudinally in parallel above the sub-top floor (3), a formwork support frame (5) installed on the I-beams (4), and a protective frame (6) arranged at the top of the formwork support frame (5); A part of the I-beam (4) is an anchoring part anchored on the sub-top floor (3), and the other part is a cantilever part cantilevered outside the structure of the sub-top floor (3); the upper part of the cantilever part of the I-beam (4) is fully covered with jump boards (7), and a large-mesh net (8) is erected below; a steel wire rope (9) is used to tie the cantilever part of the I-beam (4) to a lifting ring (10) installed on the top floor (2); The bottom of the formwork support frame (5) is installed on the cantilever part of the I-beam (4), and is tied to anchor rings (11) preset on the top floor (2) and the sub-top floor (3) through diagonal braces (13); the formwork support frame (5) extends upward to the bottom of the slab cantilevered on the roof (1); the outermost vertical poles (511) of the formwork support frame (5) extend upward above the roof (1) and are tied to the anchor rings (11) preset on the roof (1) through diagonal braces (13) to form the protective frame (6).

2. The support and protection system according to claim 1, characterized in that: The formwork support frame (5) is a steel pipe and coupler type frame body, including vertical poles, longitudinal horizontal bars, transverse horizontal bars and scissors braces. Reinforcing bar heads (41) are welded at the transverse spacing of the vertical poles on the cantilever part of the I-beam (4), the steel pipes of the vertical poles are inserted on the reinforcing bar heads (41) and then spot-welded to the I-beam (4), and a dense-mesh safety net (12) is hung outside the outermost vertical poles (511) of the formwork support frame (5).

3. The support and protection system according to claim 1, characterized in that: The outermost vertical poles (511) of the formwork support frame (5) extend upward 1.4 - 1.6 m above the parapet on the roof (1).

4. The support and protection system according to claim 1, characterized in that: At the top of the formwork support frame (5), top supports are arranged at the tops of other vertical poles except the outermost vertical poles (511). Horizontal steel pipes are arranged above the top supports. There is a square steel pipe (14) horizontally arranged longitudinally between the horizontal steel pipes and the bottom of the slab cantilevered on the roof (1). Forms are arranged above the square steel pipe (14); an outer facade longitudinal horizontal bar (521) is arranged inside the outermost vertical poles (511) of the formwork support frame (5), and forms are supported at the position between the upper part of the second outermost vertical poles (512) and the outer facade longitudinal horizontal bar (521).

5. The support and protection system according to claim 1, characterized in that: The way the I-beam (4) is anchored on the sub-top floor (3) is as follows: Removable sleeves (16) in the vertical direction are pre-embedded in the sub-top floor (3) before the concrete of the beam and slab is poured. After pouring, removable bolts (17) are inserted into the removable sleeves (16). The I-beam (4) is arranged on the concrete of the beam and slab of the sub-top floor (3) and its cross-section is located between two removable bolts (17). A steel plate (18) is arranged above the I-beam (4), and a nut (22) is tightened above the steel plate (18). The gaps between the I-beam (4) and the two removable bolts (17) are tightened with wedge woods (21).

6. The support and protection system according to claim 1, wherein: When using a steel wire rope (9) to tie the cantilever part of the I-beam (4) to the lifting ring (10) installed on the top floor (2), horizontal steel bars (19) that extend 100 mm to both sides by full fillet welding on both sides of the bottom of the cantilever part of the I-beam (4) are used for the installation of the steel wire rope (9); the steel wire rope (9) is clamped by a plurality of special steel wire rope clips (20).

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