Safety temporary protection structure for steel box girder top construction

Abstract

The utility model discloses a safe temporary protection structure for top construction of a steel box girder, which comprises vertical insertion pipe fittings which are prefabricated at intervals along the length direction of the steel box girder and are connected to the edge position of the top of the steel box girder, and the height of the vertical insertion pipe fittings is not higher than that of a purline to be laid at the top of the steel box girder; protective vertical rods are detachably inserted into the vertical inserting pipe fittings, transverse protective part connecting parts are prefabricated in the positions, close to the tops, of the mutually-opposite side faces of every two adjacent protective vertical rods in a right-opposite mode, and a transverse protective part is connected between every two mutually-opposite transverse protective part connecting parts on every two adjacent protective vertical rods. The utility model aims to solve the problems of low efficiency and higher cost during site construction of the steel box girder.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel box girder construction, and in particular relates to a safe temporary protective structure used for the top construction of a steel box girder. Background Art

[0002] Steel box girders constitute an indispensable part of modern bridge construction. Therefore, when constructing steel box girders, comprehensive safety assurance measures must be taken to ensure the safety of workers, equipment and the environment.

[0003] At present, square tubes are usually welded directly on steel box girders to be used as safety life poles, and cross bars are welded between two adjacent poles. However, after the use of this method, all square tubes need to be cut from the steel box girder, which will not only cause certain damage to the surface of the steel box girder, but also be time-consuming and labor-intensive, affecting the progress of on-site construction. There is also a "hoop-type" method to fix square tubes. For example, the patent with the publication number CN213951951U discloses an assembled steel box girder guardrail pole, including a pole body and a U-shaped clamp, the clamp includes a horizontally arranged rectangular upper clamp and a lower clamp, the upper clamp and the lower clamp have a spacing greater than the thickness of the steel box girder top plate, the upper clamp and the lower clamp are connected on one side by a side plate, a fastening bolt is screwed on the lower clamp, and the fastening bolt vertically penetrates the lower clamp; a pole connecting plate is vertically welded on the top surface of the clamp upper clamp, and the lower end of the pole body is connected to the pole connecting plate by bolts. This method uses clamps and fastening bolts to fix the two sides of the steel box beam. It is easy to install and disassemble, and can avoid damage to the steel box beam. The guardrail poles can be reused after disassembly. However, for on-site construction, this "hoop-type" method still has a cumbersome installation process, resulting in low efficiency, and greatly increases the material consumption, high costs, and increases the cost of construction. Summary of the invention

[0004] In view of the problems existing in the prior art, the utility model provides a safe temporary protection structure for the top construction of a steel box girder, which aims to solve the problems of low efficiency and high cost during on-site construction of the steel box girder.

[0005] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0006] A safe temporary protective structure for construction on the top of a steel box girder, comprising vertical plug-in pipe fittings prefabricated and connected to the edge of the top of the steel box girder at intervals along the length direction of the steel box girder, wherein the height of the vertical plug-in pipe fittings is not higher than the height of the purlins to be laid on the top of the steel box girder; protective uprights are detachably plugged into the vertical plug-in pipe fittings, and transverse protective member connecting portions are prefabricated on the sides of two adjacent protective uprights facing each other, near the top, and a transverse protective member is connected between the two transverse protective member connecting portions on the two adjacent protective uprights facing each other.

[0007] Furthermore, the vertical plug-in pipe fitting is a square tube, and a first bolt hole is opened on two opposite tube walls; the protective vertical pole is also a square tube, and a second bolt hole is opened on two opposite tube walls near the bottom; a bolt and nut assembly is used to pass through the first bolt hole and the second bolt hole to connect the vertical plug-in pipe fitting with the corresponding protective vertical pole.

[0008] Furthermore, the height of the vertical plug-in pipe fitting is 150 mm to 200 mm.

[0009] Furthermore, the height of the protective pole is 1000 mm to 1200 mm.

[0010] Furthermore, the connecting portion of the transverse protection member is a semicircular steel ring welded and fixed on the protection upright pole.

[0011] Furthermore, the transverse protective member is a steel wire rope, and both ends of the steel wire rope are tied to the corresponding semicircular steel rings.

[0012] Furthermore, the distance between two adjacent vertical plug-in pipe fittings is 1000 mm to 1200 mm.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] The utility model provides a safe temporary protection structure for the top construction of a steel box girder. When the top construction of the steel box girder is carried out on site, it is only necessary to insert the protective upright pole into the vertical plug-in pipe fitting, and then connect the transverse protection piece to the two transverse protection piece connection parts facing each other on the two adjacent protective upright poles, so as to complete the installation of the safe temporary protection structure for the top construction of the steel box girder. After the top construction of the steel box girder is completed, it is only necessary to pull out the protective upright pole from the vertical plug-in pipe fitting, because the height of the vertical plug-in pipe fitting is not higher than the height of the purlin to be laid on the top of the steel box girder, and thus will not affect the laying construction of the upper purlin of the steel box girder, so there is no need to cut off the vertical plug-in pipe fitting, and the structure of the steel box girder will not be damaged during on-site construction. The vertical plug-in pipe fitting has been connected to the steel box girder when leaving the factory and does not need to be removed, so that the temporary protection structure of this embodiment is easy to disassemble and assemble, and the efficiency of the on-site construction of the steel box girder is improved. Compared with the "hoop-type" method of fixing the life upright pole, this temporary protection structure is more material-saving and reduces construction costs.

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is an axial schematic diagram of a safe temporary protective structure for construction on the top of a steel box girder according to an embodiment of the utility model.

[0018] Figure 2 It is a front elevation schematic diagram of a safe temporary protection structure for construction on the top of a steel box girder according to an embodiment of the utility model.

[0019] Figure 3 It is a side elevation schematic diagram of a safe temporary protection structure for construction on the top of a steel box girder according to an embodiment of the utility model.

[0020] In the figure: 1-steel box girder; 2-vertical plug-in pipe fittings; 3-protective uprights; 4-transverse protective member connection portion; 5-transverse protective member; 6-bolt and nut assembly. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] As a specific embodiment of the present invention, Figure 1 , Figure 2 and Figure 3As shown, a safety temporary protection structure for the top construction of a steel box girder is formed by using a detachable life pole as a unit to form a set of safety protection structures for the top construction of a steel box girder, specifically comprising: vertical plug-in pipe fittings 2 prefabricated and connected to the top edge of the steel box girder 1 at intervals along the length direction of the steel box girder 1, and the height of the vertical plug-in pipe fittings 2 is not higher than the height of the purlins to be laid on the top of the steel box girder 1. It should be understood that the general height range of the purlins is between 150mm and 300mm. Specifically, after the vertical plug-in pipe fittings 2 are prefabricated in the processing plant, they are directly fixed to the steel box girder 1 by welding according to the design requirements. A protective pole 3 is detachably inserted in the vertical plug-in pipe fittings 2, and a transverse protective member connection part 4 is prefabricated on the side of the two adjacent protective poles 3 facing each other near the top, and a transverse protective member 5 is connected between the two transverse protective member connection parts 4 facing each other on the two adjacent protective poles 3.

[0023] That is to say, in this embodiment, a vertical plug-in pipe 2 is directly prefabricated at the top edge of the steel box girder 1, and the height of the vertical plug-in pipe 2 is ensured to be no higher than the height of the purlin to be laid at the top of the steel box girder 1. A transverse protective member connection part 4 is directly prefabricated at the position near the top on the side opposite to each other of the protective uprights 3. When the top of the steel box girder is constructed on site, it is only necessary to plug the protective uprights 3 into the vertical plug-in pipe 2, and then connect the transverse protective member 5 to the two transverse protective member connection parts 4 opposite to each other on the two adjacent protective uprights 3, so as to complete the installation of the safe temporary protective structure for the top construction of the steel box girder. When the top construction of the steel box girder is completed, it is only necessary to pull the protective uprights 3 out of the vertical plug-in pipe 2, because the height of the vertical plug-in pipe 2 is no higher than the height of the purlin to be laid at the top of the steel box girder 1, and thus it will not affect the laying construction of the upper purlin of the steel box girder 1, so there is no need to cut off the vertical plug-in pipe 2, and the structure of the steel box girder 1 will not be damaged during on-site construction. The vertical plug-in pipe fittings 2 have been connected to the steel box girder 1 before leaving the factory and do not need to be removed, making the temporary protection structure of this embodiment easy to disassemble and assemble, thereby improving the efficiency of on-site construction of the steel box girder. Compared with the "hoop-type" method of fixing the life pole, this temporary protection structure also saves more materials and reduces construction costs.

[0024] In one embodiment, if Figure 1As shown, the vertical plug-in pipe fitting 2 is a square tube, and a first bolt hole is opened on the two tube walls facing the square tube. The protective pole 3 is also a square tube, and a second bolt hole is opened on the two tube walls facing the square tube near the bottom. The bolt and nut assembly 6 is passed through the first bolt hole and the second bolt hole to connect the vertical plug-in pipe fitting 2 with the corresponding protective pole 3, that is, the bolt and nut assembly 6 is used to realize the detachable connection between the vertical plug-in pipe fitting 2 and the corresponding protective pole 3, which improves the connection reliability between the plug-in pipe fitting 2 and the corresponding protective pole 3, and is convenient for disassembly and assembly. After all the construction on the upper part of the steel box girder is completed, the bolt and nut assembly 6 is removed, and the protective pole 3 is taken out from the vertical plug-in pipe fitting 2. Exemplarily, the specifications of the bolt and nut assembly 6 are C grade, 4.8 grade, A12*65.

[0025] More preferably, the height of the vertical plug-in pipe 2 is 150 mm to 200 mm, which can be lower than the height of the main purlin, does not affect the construction of the upper structure, and can ensure reliable connection with the protective upright 3. Exemplarily, the height of the vertical plug-in pipe 2 is 150 mm, and the specification is 50 mm*3 mm square tube. Of course, the height of the vertical plug-in pipe 2 can also be 160 mm, 170 mm, 180 mm, 190 mm or 200 mm, etc.

[0026] Preferably, the height of the protective pole 3 is 1000mm to 1200mm, which can provide better safety protection. For example, the height of the protective pole 3 is 1200mm, and the specification is 40mm*3mm square tube. Similarly, the height of the protective pole 3 can also be 1000mm, 1050mm, 1100mm or 1150mm, etc.

[0027] In one embodiment, in combination Figure 1 and Figure 2 As shown, the transverse protection member connecting portion 4 is a semicircular steel ring welded and fixed on the protection pole 3, which is convenient for connecting the transverse protection member 5. Preferably, the semicircular steel ring is fixed to the protection pole 3 by double-sided fillet welds. For example, the semicircular steel ring is made of A6 round steel.

[0028] Preferably, the transverse protection member 5 is made of steel wire rope. During installation, the two ends of the steel wire rope are tied to the corresponding semicircular steel rings, and the steel wire rope passes through the semicircular steel rings to connect all the protection uprights 3, which is convenient to install and low in cost. After all the construction on the upper part of the steel box girder is completed, the steel wire rope can be removed and used for steel box girders in other areas.

[0029] As a more preferred embodiment, the distance between two adjacent vertical plug-in pipe fittings 2 is 1000mm to 1200mm, which can ensure the protection effect while reducing the construction cost as much as possible. Preferably, the vertical plug-in pipe fittings 2 are evenly distributed along the length direction of the steel box girder 1. Exemplarily, the distance between two adjacent vertical plug-in pipe fittings 2 is 1000mm.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "connection" and the like 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A safe temporary protective structure for the top construction of a steel box girder, characterized in that: It comprises vertical plug-in pipe fittings (2) prefabricated and connected to the top edge of the steel box girder (1) at intervals along the length direction of the steel box girder (1), wherein the height of the vertical plug-in pipe fittings (2) is not higher than the height of the purlins to be laid on the top of the steel box girder (1); a protective vertical pole (3) is detachably plugged into the vertical plug-in pipe fittings (2), a transverse protective member connecting portion (4) is prefabricated at a position close to the top on the side surfaces of two adjacent protective vertical poles (3) facing each other, and a transverse protective member (5) is connected between the two transverse protective member connecting portions (4) facing each other on the two adjacent protective vertical poles (3).

2. A safe temporary protective structure for top construction of a steel box girder according to claim 1, characterized in that: The vertical plug-in tube (2) is a square tube, and two opposite tube walls are provided with first bolt holes; the protective upright pole (3) is also a square tube, and two opposite tube walls are provided with second bolt holes near the bottom; a bolt and nut assembly (6) is used to pass through the first bolt hole and the second bolt hole to connect the vertical plug-in tube (2) with the corresponding protective upright pole (3).

3. A safe temporary protection structure for top construction of a steel box girder according to claim 1, characterized in that: The height of the vertical plug-in pipe (2) is 150 mm to 200 mm.

4. A safe temporary protection structure for top construction of a steel box girder according to claim 3, characterized in that: The height of the protective pole (3) is 1000 mm to 1200 mm.

5. A safe temporary protection structure for top construction of a steel box girder according to claim 1, characterized in that: The transverse protection member connecting portion (4) is a semicircular steel ring welded and fixed on the protection upright pole (3).

6. A safe temporary protection structure for top construction of a steel box girder according to claim 5, characterized in that: The transverse protection member (5) is a steel wire rope, and both ends of the steel wire rope are tied to the corresponding semicircular steel rings.

7. A safe temporary protection structure for top construction of a steel box girder according to claim 1, characterized in that: The distance between two adjacent vertical plug-in pipe fittings (2) is 1000 mm to 1200 mm.

Images