Top and bottom plate welding tool for single-box double-chamber steel box girder

Abstract

The utility model discloses a welding tool for a top plate and a bottom plate of a single-box double-chamber steel box girder, and relates to the field of municipal bridge construction. The welding tool comprises a vertical supporting piece and a connecting piece, the vertical supporting piece comprises a vertical connecting piece and a supporting piece, the vertical connecting piece is used for being connected with the connecting piece, and the supporting piece is used for supporting the single web side steel box girder; one end of the connecting piece is used for being connected with a web of the double-web side steel box girder, and the other end of the connecting piece is used for being connected with the vertical supporting piece. The utility model further provides a welding method. According to the steel box girder butt joint device, time waste caused by high-altitude butt joint, seam stacking and other procedures of the steel box girder can be reduced to a great extent, the construction progress is accelerated, and labor is saved. And secondly, due to the increase of the construction time, the construction quality of welding operators is indirectly guaranteed, and the quality defect caused by time scrambling is avoided.

Description

Technical Field

[0001] The utility model relates to the field of municipal bridge construction, in particular to a single-box double-chamber steel box girder top and bottom plate welding tool. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] At present, in the construction planning stage of municipal bridges, whether it is a single straight section structure or a complex interchange system, when it involves crossing existing roads. Due to the many advantages of steel structure, such as light weight, factory prefabrication, and short on-site construction period, the rapid recovery of road traffic is guaranteed, that is, steel box girders are usually used as the structural form of new bridges across existing road sections. The disadvantage of the conventional reinforced concrete bridge structure using cast-in-place construction resulting in a long construction period is avoided. The steel box girder in conventional urban bridges usually adopts a single-box double-chamber structural system, that is, the core structure is the top plate and the bottom plate, and the middle part is the left, middle, and right three webs that divide a section into two equal-volume boxes. Each box uses equidistant or unequally spaced partitions in the direction of the bridge span to strengthen the rigidity, thereby forming a complete bridge box structure.

[0004] During the steel box girder construction phase, the primary task of prefabrication of steel box girders is for on-site technicians to split the steel box girders, taking into account the performance, size, and site conditions of the lifting machinery. The longitudinal and transverse splitting of the steel box girders is determined by many conditions, including the existing road width, pier spacing, existing building size and location, lifting machinery selection, and traffic control department requirements. For the transverse splitting of the single-box double-chamber structure used in most municipal steel box girders, the web is used as the dividing line, with one side being a completed box with two webs and the other side being an incomplete box with a single web.

[0005] This division method leads to a large difference in vertical stiffness between the left and right boxes, especially in the area without transverse partitions. This results in the need for the left and right boxes to be seamed before welding, that is, the operator uses an "L"-shaped bracket and a jack to manually adjust the top or bottom plate on the upturned or downturned side at a certain distance (usually 200mm to 500mm) on the plate surface, so that the plate surface is flush, and then temporarily welded and fixed with steel plates.

[0006] Steel box girders are a conventional structural form for municipal bridges. They are widely used in urban bridge structures across existing roads due to their many advantages, such as light weight, factory prefabrication, and short on-site construction period. However, the existing transverse segmentation process during factory prefabrication of steel box girders, for the common urban single-box double-chamber structure, has a significantly smaller vertical stiffness on the single web side, especially on the top and bottom plates where there is no transverse partition, than on the double web side. Differences in structural stiffness and processing accuracy can lead to misaligned seams on the top and bottom plates of the left and right boxes. As a result, the misaligned seams must be corrected manually, which delays the installation progress of the steel box girder and even affects the welding quality.

[0007] The existing technology is to manually use an "L"-shaped bracket with a jack to adjust the top plate on the deflected side. When the jack makes the staggered plate surface flush, the operator immediately uses a steel code plate to weld the two sides of the plate surface together, and repeats this cycle until the entire plate surface is flush, and finally the formal welding operation is carried out.

[0008] For single-box double-chamber steel box girders across existing roads in cities, traffic is usually closed at night for installation, and the road must be opened to traffic in the early morning of the next day. Therefore, before opening traffic, the bottom plate or top plate welding primer process of the steel box girder must be completed to ensure normal welding operations on the next day. However, the preparation of lifting machinery, transportation and positioning of steel box girders have taken up a lot of operating time, and coupled with the seam-stitching process, there is very little time left for the welding primer process. The construction progress can only be accelerated by increasing the number of welders, but the labor consumption and welding quality are difficult to guarantee. Therefore, there is a need for a method and measure that can be prefabricated in advance in the factory to speed up or even avoid the seam-stitching process. Utility Model Content

[0009] The purpose of the utility model is to provide a single-box double-chamber steel box girder top and bottom plate welding tool to solve the problems of time-consuming and costly manual correction in the current welding process of the top and bottom plates of the single-box double-chamber steel box girder, limited time for nighttime road closures for road construction, long time consumption of the existing technical process, and speeding up the progress by increasing the number of welding workers, which is easy to affect the welding quality.

[0010] The technical solution of the utility model is as follows:

[0011] A single-box double-chamber steel box girder top and bottom plate welding tool, comprising: a vertical support member and a connecting member; the vertical support member comprises: a vertical connecting member and a supporting member, the vertical connecting member is used to be connected to the connecting member, and the supporting member is used to support the single-web side steel box girder; one end of the connecting member is used to be connected to the web of the double-web side steel box girder, and the other end is used to be connected to the vertical support member.

[0012] Furthermore, there are two vertical support members, which are respectively installed at both ends of the connecting member through respective vertical connecting members, and the respective support members are used to support the single-web side steel box girder and the double-web side steel box girder respectively.

[0013] Furthermore, the connecting member is an L-shaped plate, one end of which is used to be connected to the web of the double-web side steel box girder, and the other end of which is used to be connected to the vertical connecting member.

[0014] Furthermore, the short side of the L-shaped plate can be connected to the web of the double-web side steel box girder by welding, and the long side of the L-shaped plate is provided with a first mounting hole for connecting to a vertical connecting piece; a second mounting hole is provided on the vertical connecting piece; and the long side of the L-shaped plate and the vertical connecting piece are connected by bolts.

[0015] Furthermore, there are four first mounting holes and four second mounting holes, which are arranged in a rectangular shape.

[0016] Furthermore, the vertical support member is a T-shaped plate; the horizontal plate of the T-shaped plate serves as a vertical connecting member, and the vertical plate serves as a support member.

[0017] Furthermore, the four second mounting holes are arranged in pairs of two and are respectively located on both sides of the vertical plate.

[0018] A method for welding the top and bottom plates of a single-box double-chamber steel box beam is based on the above-mentioned welding tool for the top and bottom plates of a single-box double-chamber steel box beam, comprising:

[0019] Step S1: During the processing stage, the top and bottom plate welding fixtures of the single-box double-chamber steel box girder are installed on the double-web side steel box girder;

[0020] Step S2: During on-site installation, the double-web side steel box girder is hoisted to a preset position;

[0021] Step S3: Based on the top and bottom plate welding tooling of the single-box double-chamber steel box girder, the single-web side steel box girder is hoisted to a preset position to complete temporary positioning;

[0022] Step S4: Remove the top and bottom plate welding tooling of the single-box double-chamber steel box girder and start the formal welding process.

[0023] Furthermore, the step S1 comprises:

[0024] Before the double-web side steel box girder leaves the factory, the L-shaped plate is welded to the web of the double-web side steel box girder, and the two lower T-shaped plates are bolted to the L-shaped plate to ensure that the top of the T-shaped plate is flush and the top of the T-shaped plate on the double-web side steel box girder is in close contact with its bottom plate.

[0025] Furthermore, the step S3 comprises:

[0026] During on-site installation, after the double-web side steel box girder is in place, the single-web side steel box girder is lifted by a lifting machinery. During the process of the lower hook fitting with the double-web side steel box girder, the bottom plate of the single-web side steel box girder is vertically supported by the T-plate and forced to be flush with the bottom plate of the double-web side steel box girder.

[0027] Compared with the existing technology, the beneficial effects of the utility model are:

[0028] 1. A single-box double-chamber steel box girder top and bottom plate welding tool can greatly reduce the time waste caused by high-altitude docking and seaming of steel box girders under the premise of tight construction time in closed road construction, speed up the construction progress and save labor. Secondly, due to the increase in construction time, it also indirectly guarantees the construction quality of welding workers and avoids quality defects caused by rushing for time.

[0029] 2. A single-box double-chamber steel box girder top and bottom plate welding tooling has a simple structure, clear force and high reliability.

[0030] 3. A method for welding the top and bottom plates of a single-box double-chamber steel box beam, which is simple to install and dismantle, can be quickly disassembled, speeds up construction progress, and saves labor.

[0031] 4. A single-box double-chamber steel box girder top and bottom plate welding tooling, which can be prefabricated and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the use of a welding tool for the top and bottom plates of a single-box double-chamber steel box beam;

[0033] Figure 2 It is a structural schematic diagram of an L-shaped plate;

[0034] Figure 3 It is a structural schematic diagram of the T-type plate.

[0035] Figure numerals: 1-double web side steel box girder, 2-single web side steel box girder, 3-web, 4-L-shaped plate, 5-T-shaped plate, 6-first mounting hole, 7-second mounting hole. DETAILED DESCRIPTION

[0036] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0038] Embodiment 1

[0039] See also Figure 1-3 , a single-box double-chamber steel box girder top and bottom plate welding tool, comprising:

[0040] Vertical support members and connecting members; the vertical support members include: vertical connecting members and supporting members, the vertical connecting members are used to be connected to the connecting members, and the supporting members are used to support the single-web side steel box girder 2; one end of the connecting member is used to be connected to the web 3 of the double-web side steel box girder 1, and the other end is used to be connected to the vertical support member.

[0041] In this embodiment, specifically, there are two vertical support members, which are respectively installed at both ends of the connecting members through respective vertical connecting members, and the respective support members are used to support the single-web side steel box girder 2 and the double-web side steel box girder 1 respectively.

[0042] In this embodiment, specifically, the connecting member is an L-shaped plate 4, one end of which is used to connect with the web 3 of the double-web side steel box girder 1, and the other end of which is used to connect with the vertical connecting member.

[0043] In this embodiment, specifically, the short side of the L-shaped plate 4 can be connected to the web 3 of the double-web side steel box girder 1 by welding, and the long side of the L-shaped plate 4 is provided with a first mounting hole 6 for connecting with a vertical connecting member; a second mounting hole 7 is provided on the vertical connecting member; the long side of the L-shaped plate 4 and the vertical connecting member are connected by bolts.

[0044] In this embodiment, specifically, there are four first mounting holes 6 and four second mounting holes 7 arranged in a rectangular shape.

[0045] In this embodiment, specifically, the vertical support member is a T-shaped plate 5; the horizontal plate of the T-shaped plate 5 serves as a vertical connecting member, and the vertical plate serves as a support member.

[0046] In this embodiment, specifically, the four second mounting holes 7 are arranged in pairs and are respectively located on both sides of the vertical plate.

[0047] Under the premise of tight construction time during closed road construction, the device proposed in this embodiment can greatly reduce the time waste caused by processes such as high-altitude docking and seaming of steel box girders, speed up the construction progress, and save labor. Secondly, due to the increase in construction time, the construction quality of welding workers is indirectly guaranteed, avoiding quality defects caused by rushing for time.

[0048] Embodiment 2

[0049] Embodiment 2 Based on the welding tool for the top and bottom plates of a single-box double-chamber steel box girder proposed in Embodiment 1, a welding method for the top and bottom plates of a single-box double-chamber steel box girder is also proposed, which specifically includes the following steps:

[0050] Step S1: During the processing stage, the top and bottom plate welding tooling of the single-box double-chamber steel box girder is installed on the double-web side steel box girder 1;

[0051] Step S2: During on-site installation, the double-web side steel box girder 1 is hoisted to a preset position;

[0052] Step S3: Based on the top and bottom plate welding tooling of the single-box double-chamber steel box girder, the single-web side steel box girder 2 is hoisted to a preset position to complete temporary positioning;

[0053] Step S4: Remove the top and bottom plate welding tooling of the single-box double-chamber steel box girder and start the formal welding process.

[0054] In this embodiment, specifically, step S1 includes:

[0055] Before the double-web side steel box girder 1 leaves the factory, the L-shaped plate 4 is first welded to the web 3 of the double-web side steel box girder 1, and at the same time, the two lower T-shaped plates 5 are bolted to the L-shaped plate 4 to ensure that the top of the T-shaped plate 5 is flush and the top of the T-shaped plate 5 on the double-web side steel box girder 1 is in close contact with its bottom plate.

[0056] In this embodiment, specifically, step S3 includes:

[0057] During on-site installation, after the double-web side steel box girder 1 is in place, the single-web side steel box girder 2 is lifted by a lifting machinery. During the process of the lower hook fitting with the double-web side steel box girder 1, the bottom plate of the single-web side steel box girder 2 is vertically supported by the T-plate 5 and forced to be flush with the bottom plate of the double-web side steel box girder 1.

[0058] That is, before the double-web side steel box girder 1 leaves the factory, the L-shaped plate 4 is first welded to the web 3 of the double-web 3 steel box girder, and at the same time, the two lower T-shaped plates 5 are bolted to the L-shaped plate 4 to ensure that the top of the T-shaped plate 5 is flush and the top of the T-shaped plate 5 on the double-web 3 steel box girder side is in close contact with its bottom plate.

[0059] During on-site installation, after the double-web side steel box girder 1 is in place, the single-web side steel box girder 2 is lifted by a lifting machinery. During the process of the lower hook fitting with the double-web 3 steel box girder, the single-web 3 steel box girder deflects downward due to its low rigidity, and its bottom plate is vertically supported by the T-plate 5 and forced to be flush with the bottom plate of the double-web side steel box girder 1.

[0060] Afterwards, the operator can temporarily fix the bottom plates of the steel box beams on both sides without or with a small amount of seams. After the temporary fixation is completed, the connecting bolts of the L-shaped plate 4 and the T-shaped plate 5 are removed, and the connection between the L-shaped plate 4 and the web 3 of the double web 3 steel box beam is cut, and the entire device can be removed, and the formal welding process can be quickly entered.

[0061] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0062] This background technology section is provided to generally present the context of the present invention, and the work of the currently named inventors, the work to the extent described in this background technology section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art of the present invention.

Claims

1. A single-box double-chamber steel box girder top and bottom plate welding tool, characterized in that: include: A vertical support member and a connecting member; the vertical support member comprises: a vertical connecting member and a supporting member, the vertical connecting member is used to be connected to the connecting member, and the supporting member is used to support a single-web side steel box girder (2); one end of the connecting member is used to be connected to the web (3) of the double-web side steel box girder (1), and the other end is used to be connected to the vertical support member.

2. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 1 is characterized in that: There are two vertical support members, which are respectively installed at both ends of the connecting member through respective vertical connecting members, and the respective support members are used to support the single-web side steel box girder (2) and the double-web side steel box girder (1).

3. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 2 is characterized in that: The connecting piece is an L-shaped plate (4), one end of which is used to be connected to the web (3) of the double-web side steel box girder (1), and the other end of which is used to be connected to the vertical connecting piece.

4. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 3 is characterized in that: The short side of the L-shaped plate (4) can be connected to the web (3) of the double-web side steel box girder (1) by welding; the long side of the L-shaped plate (4) is provided with a first mounting hole (6) for connecting to a vertical connecting member; the vertical connecting member is provided with a second mounting hole (7); the long side of the L-shaped plate (4) and the vertical connecting member are connected by bolts.

5. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 4 is characterized in that: There are four first mounting holes (6) and four second mounting holes (7) arranged in a rectangular shape.

6. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 5 is characterized in that: The vertical support member is a T-shaped plate (5); the horizontal plate of the T-shaped plate (5) serves as a vertical connecting member, and the vertical plate serves as a support member.

7. The top and bottom plate welding tool for a single-box double-chamber steel box beam according to claim 6 is characterized in that: The four second mounting holes (7) are arranged in pairs and are respectively located on both sides of the vertical plate.

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