Overhanging eave supporting structure for high-rise steel frame concrete roof and construction method

Abstract

The invention provides a cornice supporting structure for a high-rise steel frame concrete roof and a construction method.The cornice supporting structure comprises a cornice formwork and stiffening ribs, the cornice formwork and the stiffening ribs are installed on a main beam, and the cornice formwork is arranged at the top of the main beam and extends towards the outer side of the main beam; the stiffening rib is arranged on the cornice formwork, one end of the stiffening rib is connected with the main beam, and the stiffening rib is used for tying the cornice formwork and the main beam. The main beam is fully used for fixing the cornice formwork, the cornice formwork is large in rigidity and tightly combined with the steel frame, the number of operation procedures is small, installation is easy, the construction efficiency of a roof and a cornice and the integrity and forming quality of a building are improved, the construction cost is reduced, and the safety is higher than that of an outer cantilever inclined steel pipe frame; the arc-shaped flow guide part at the bottom of the cornice formwork meets the roof waterproof structure, the cornice formwork is not detached after concrete forming, the whole roof is formed, and the forming quality of a building is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an overhanging eaves supporting structure for a high-rise steel frame concrete roof and a construction method. Background Art

[0002] When high-rise steel-frame industrial buildings and structures are large (greater than 24 meters) and have relatively small horizontal projection areas, design units often design floor decking structure roofs and eaves in order to meet the requirements of the Technical Code for Concrete Structures of High-rise Buildings on the structural mass ratio and the floor lateral stiffness ratio. In addition, the functional requirements of the roof structure must be met. The length of the eaves needs to cover the structural thickness of the wall purlins and color plates. In specific projects, the outer edge of the eaves is about 750 mm from the center line of the beam, making it difficult to install the eaves support formwork.

[0003] If the floor decking is erected from the inside to the centerline of the main beam, and then the L-shaped edge banding is arranged outside the centerline of the main beam, the concrete cantilever width requirement cannot be met; if the floor decking is laid outward to the cantilever position, the edge banding cannot be fixed to the main beam. Therefore, the existing construction technology has evolved into: erecting an outward inclined steel pipe frame from the inside of the building to the outside to support the cantilever wood formwork, the outward inclined steel pipe frame is tied to the main body of the steel frame, and the cantilever wood formwork and the steel frame are tightened. This construction plan has many processes, great safety hazards, and uneconomical investment. In addition, the joints between the cantilever wood formwork and the steel frame will cause many common quality problems. Summary of the invention

[0004] The object of the present invention is to provide an eaves supporting structure and a construction method for a high-rise steel frame concrete roof to solve the above-mentioned problems.

[0005] The technical solution of the present invention includes: an eaves support structure for a high-rise steel frame concrete roof, which includes an eaves formwork and stiffening ribs installed on a main beam, wherein the eaves formwork is arranged on the top of the main beam and extends toward the outside of the main beam; the stiffening rib is arranged on the eaves formwork, one end of which is connected to the main beam, and is used to tie the eaves formwork and the main beam together.

[0006] Preferably, the eaves formwork includes a bottom formwork and a side formwork, one end of the bottom formwork is connected to the main beam via bolt 1, and the other end is fixedly connected to the side formwork, and the stiffening rib is arranged on a side of the side formwork close to the main beam and connected to the main beam via bolt 2.

[0007] Preferably, the stiffening ribs are plate-shaped, and a plurality of them are distributed along the length direction of the side formwork, and each of the stiffening ribs is provided with a plurality of corresponding steel bar through-holes.

[0008] Preferably, the bottom end and the side end of the stiffening rib are fixedly connected to the bottom mold and the side mold respectively; in the direction away from the side mold, the end of the bottom mold exceeds the end of the stiffening rib.

[0009] Preferably, in the direction away from the side form, an ear plate extends from the end of the stiffening rib, and an arc-shaped portion is provided on the ear plate. The arc-shaped portion is detachably connected to an arc-shaped buckle plate, and the two are connected to install the second bolt.

[0010] Preferably, a lap plate is provided at one end of the bottom mold along the length direction, and the bottom surface of the lap plate is flush with the top surface of the bottom mold.

[0011] Preferably, an arc-shaped guide portion is provided at the bottom of one end of the eaves template away from the main beam, and the arc-shaped guide portion extends downward from the bottom surface of the eaves template, with the concave side facing the main beam.

[0012] The technical solution of the present invention also includes: a construction method for an overhanging eaves support structure for a high-rise steel frame concrete roof, comprising the steps of:

[0013] Finalize the production of eaves formwork and stiffening ribs;

[0014] Install the steel frame and floor decking, assemble multiple eaves templates along the length direction of the main beam of the steel frame, and fix the stiffening ribs on the eaves templates;

[0015] Check the flatness of the overlapped joints of each cantilever formwork, fix the cantilever formwork and stiffening ribs to the main beam with bolt one and bolt two respectively, and cast the roof and cantilever.

[0016] Preferably, when pouring the roof and the eaves, two layers of steel bars are laid, the bottom layer of steel bars extends in the same direction as the main beam and is passed through the steel bar perforations on the stiffening ribs, and the top layer of steel bars is perpendicular to the extension direction of the main beam and is laid on the top of the stiffening ribs.

[0017] The beneficial effects of the present invention are as follows: the main beam is fully utilized to fix the cantilever eaves formwork, the cantilever eaves formwork has high self-rigidity and is tightly combined with the steel frame, with fewer operation procedures and simple installation, which solves the problem that the traditional technology cannot connect and fix the L-shaped edge banding plate to the main beam, and requires the setting of an externally projecting inclined steel pipe frame to support the cantilever eaves wooden formwork, which brings about operational inconvenience and quality problems in construction, improves the construction efficiency of the roof and the cantilever eaves, as well as the integrity and molding quality of the building, reduces the construction cost, and is safer than the externally projecting inclined steel pipe frame; the arc-shaped guide part at the bottom of the cantilever eaves formwork meets the roof waterproof structure, and the cantilever eaves formwork is not removed after the concrete is formed but forms the roof as a whole, further improving the molding quality of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a stereogram of an embodiment of the present invention;

[0019] Figure 2 is a front view of an embodiment of the present invention;

[0020] Figure 3 1 is a bottom view of the stiffening rib in the embodiment of the present invention.

[0021] In the figure:

[0022] 1. Main beam; 2. Eaves formwork; 2-1. Bottom formwork; 2-2. Side formwork; 3. Stiffening ribs; 3-1. Rebar punching holes; 4. Bolt one; 5. Bolt two; 6. Ear plate; 6-1. Arc-shaped part; 7. Arc-shaped gusset plate; 8. Bolt; 9. Lap plate; 10. Arc-shaped guide part. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] Reference Figure 1-3The embodiment of the present invention provides an eaves support structure for a high-rise steel frame concrete roof, which includes an eaves template 2 and a stiffening rib 3 installed on a main beam 1. The eaves template 2 is arranged on the top of the main beam 1 and extends to the outside of the main beam 1; the stiffening rib 3 is arranged on the eaves template 2, one end of which is connected to the main beam 1, and is used to tie the eaves template 2 and the main beam 1 together. The eaves template 2 and the stiffening rib 3 are connected to the main beam 1 through bolts 1 4 and bolts 2 5, respectively. The main beam 1 is a crossbeam of a steel frame structure, which serves as the installation support part of the eaves support structure. The present application does not make specific restrictions on its shape and structure. The accompanying drawings only show some possible shapes, which are not intended to limit the scope of protection of the present application.

[0027] The above-mentioned cantilever eaves formwork 2 includes a bottom formwork 2-1 and a side formwork 2-2, and the length direction of both are the same as that of the main beam 1. The plate surface of the bottom formwork 2-1 is parallel to the top surface of the main beam 1, and is laid on the top surface of the main beam 1 and fixed by a bolt 4; the plate surface of the side formwork 2-2 is perpendicular to the top surface of the main beam 1, and is welded and fixed to the end of the bottom formwork 2-1 away from the main beam 1; the stiffening rib 3 is arranged on the side of the side formwork 2-2 close to the main beam 1, and its length direction is perpendicular to the length direction of the side formwork 2-2, one side end is welded and fixed to the side formwork 2-2, the bottom end is welded and fixed to the bottom formwork 2-1, and the other side end is fixed to the main beam 1 by a bolt 5.

[0028] To improve connection stability and operational convenience, in this embodiment, the end of the bottom mold 2-1 in the direction away from the side mold 2-2 exceeds the end of the stiffening rib 3, so that the bottom mold 2-1 is positioned first and then the stiffening rib 3 is fixed.

[0029] When constructing a high-rise steel frame concrete roof and cantilevered eaves, floor decking and the cantilevered eaves supporting structure are respectively installed on both sides of the center line of the top of the main beam 1, and the roof and cantilevered eaves concrete are poured thereon. Due to the pulling effect of the stiffening ribs 3, the cantilevered eaves formwork 2 can be stably fixed on the main beam 1 and receive the concrete. After pouring, there is no need to dismantle the cantilevered eaves supporting structure, the roof and the cantilevered eaves are constructed as one, and the cantilevered eaves supporting structure is used to improve the connection stability between the roof and the cantilevered eaves, thereby improving the overall quality of the building.

[0030] This technical solution makes full use of the main beam 1 to fix the cantilever eaves formwork 2. The cantilever eaves formwork 2 has great rigidity and is tightly combined with the steel frame. It has fewer operating procedures and is simple to install. It solves the problems of the traditional technology that the L-shaped edge banding plate cannot be connected and fixed to the main beam 1, and an external cantilevered inclined steel pipe frame is required to support the cantilevered wooden formwork. This solves the operational inconvenience and quality problems caused by the construction. It improves the construction efficiency of the roof and the cantilevered eaves, the integrity and molding quality of the building, reduces the construction cost, and is safer than the external cantilevered inclined steel pipe frame.

[0031] In this embodiment, the stiffening ribs 3 are plate-shaped, and a plurality of them are distributed along the length direction of the side form 2-2. Each stiffening rib 3 is provided with a plurality of corresponding steel bar through-holes 3-1. The steel bar through-holes 3-1 are used to penetrate the bottom steel bars of the cantilever eaves to improve the structural stability of the cantilever eaves.

[0032] Due to the shape and structure of the stiffening rib 3, in order to facilitate its connection with the bottom mold 2-1 and the main beam 1, in this embodiment, in the direction away from the side mold 2-2, the end of the stiffening rib 3 extends out a lug plate 6, and the lug plate 6 is provided with an arc portion 6-1, and the arc portion 6-1 is detachably connected to an arc gusset plate 7, and the two are connected to install the stud 2 5. Optionally, the arc portion 6-1 and the arc gusset plate 7 can be connected by bolts 8.

[0033] Usually, the length of the cantilever eaves is long, and multiple cantilever eaves supporting structures need to be spliced ​​together. Therefore, in this embodiment, a lap plate 9 is provided on one end of the bottom mold 2-1 along the length direction. The lap plate 9 is located above the bottom, and the bottom surface of the lap plate 9 is flush with the top surface of the bottom mold 2-1, so that the bottom surface of the lap plate 9 abuts against the top surface of another bottom mold 2-1, thereby improving the tightness of the connection and the flatness of the connection part. Usually, the cantilever eaves template 2 is prefabricated, so a cantilever eaves template 2 of appropriate length and specially used to supplement the length at the edge can be designed according to the common cantilever eaves size. This template does not need to be provided with a lap plate 9. Of course, it can also be a cantilever eaves template 2 of universal size. After splicing, the edge is cut according to the length of the cantilever eaves.

[0034] Since the eaves formwork 2 is not removed after pouring and serves as a part of the building structure, in this embodiment, an arc-shaped guide portion 10 is provided at the bottom of the end of the eaves formwork 2 away from the main beam 1, that is, an arc-shaped guide portion 10 is provided on the bottom surface of the bottom formwork 2-1. The arc-shaped guide portion 10 extends downward from the bottom surface of the bottom formwork 2-1, and the concave side faces the main beam 1, so as to prevent water from entering the gap between the wall panel and the roof panel, thereby affecting the quality of the building.

[0035] The method for constructing the cantilever support structure of a high-rise steel frame concrete roof comprises the following steps:

[0036] (1) Finalizing and manufacturing the eaves formwork 2 and the stiffening ribs 3;

[0037] (2) Install the steel frame and the floor deck, assemble a plurality of cantilever formworks 2 along the length direction of the main beam 1 of the steel frame, and weld the stiffening ribs 3 to the cantilever formworks 2, specifically: weld the bottom surface of the stiffening ribs 3 to the top surface of the bottom form 2-1 in the cantilever formwork 2, and weld one side end of the stiffening ribs 3 to the side form 2-2 in the cantilever formwork 2;

[0038] (3) Check the flatness of the overlapped joints of each cantilever formwork 2, fix the cantilever formwork 2 and the stiffening rib 3 to the main beam 1 with bolts 1 4 and bolts 2 5 respectively, and cast the roof and cantilever. During casting, lay two layers of steel bars. The bottom layer of steel bars extends in the same direction as the main beam 1 and is passed through the steel bar perforations 3-1 on the stiffening rib 3. The top layer of steel bars is perpendicular to the extension direction of the main beam 1 and is laid on the top of the stiffening rib 3.

[0039] Compared with the prior art, the beneficial effects of the present invention are: making full use of the main beam 1 to fix the eaves formwork 2, the eaves formwork 2 has great self-rigidity and is tightly combined with the steel frame, with fewer operating procedures and simple installation, solving the problems of the traditional technology that the L-shaped edge banding plate cannot be connected and fixed to the main beam 1, and an externally projecting inclined steel pipe frame is required to support the eaves wooden formwork, which brings operational inconvenience and quality problems to the construction, improves the construction efficiency of the roof and eaves, the integrity and molding quality of the building, reduces the construction cost, and is safer than the externally projecting inclined steel pipe frame; the arc-shaped guide part 10 at the bottom of the eaves formwork 2 meets the roof waterproof structure, and the eaves formwork 2 is not removed after the concrete is formed but forms the roof as a whole, further improving the molding quality of the building.

[0040] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An overhanging eaves support structure for a high-rise steel frame concrete roof, characterized in that: It includes an eaves template and a stiffening rib installed on the main beam. The eaves template is arranged on the top of the main beam and extends to the outside of the main beam. The stiffening rib is arranged on the eaves template, one end of which is connected to the main beam and is used to tie the eaves template and the main beam together.

2. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to claim 1 is characterized in that: The eaves formwork includes a bottom formwork and a side formwork, one end of the bottom formwork is connected to the main beam via bolt 1, and the other end is fixedly connected to the side formwork, the stiffening rib is arranged on a side of the side formwork close to the main beam, and is connected to the main beam via bolt 2.

3. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to claim 2 is characterized in that: The stiffening ribs are plate-shaped, and a plurality of them are distributed along the length direction of the side formwork. Each of the stiffening ribs is provided with a plurality of corresponding steel bar through holes.

4. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to claim 2, characterized in that: The bottom end and the side end of the stiffening rib are fixedly connected to the bottom mold and the side mold respectively; in the direction away from the side mold, the end of the bottom mold exceeds the end of the stiffening rib.

5. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to claim 4, characterized in that: In the direction away from the side form, an ear plate extends from the end of the stiffening rib, and an arc-shaped portion is provided on the ear plate. The arc-shaped portion is detachably connected to an arc-shaped buckle plate, and the two are connected to install the second bolt.

6. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to claim 2, characterized in that: A lap plate is provided at one end of the bottom mold along the length direction, and the bottom surface of the lap plate is flush with the top surface of the bottom mold.

7. The overhanging eaves supporting structure for high-rise steel frame concrete roof according to any one of claims 1 to 6, characterized in that: An arc-shaped guide portion is provided at the bottom of one end of the eaves template away from the main beam. The arc-shaped guide portion extends downward from the bottom surface of the eaves template, with the concave side facing the main beam.

8. A construction method for an overhanging eaves support structure for a high-rise steel frame concrete roof, characterized in that: Includes steps: Finalize the production of eaves formwork and stiffening ribs; Install the steel frame and floor decking, assemble multiple eaves templates along the length direction of the main beam of the steel frame, and fix the stiffening ribs on the eaves templates; Check the flatness of the overlapped joints of each cantilever formwork, fix the cantilever formwork and stiffening ribs to the main beam with bolt one and bolt two respectively, and cast the roof and cantilever.

9. The construction method of the overhanging eaves support structure for a high-rise steel frame concrete roof according to claim 8, characterized in that: When pouring the roof and eaves, two layers of steel bars are laid. The bottom layer of steel bars extends in the same direction as the main beam and is passed through the steel bar holes on the stiffening ribs. The top layer of steel bars is perpendicular to the extension direction of the main beam and is laid on the top of the stiffening ribs.

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