Installation and construction method for light well steel structure beam

Abstract

The invention discloses a light well steel structure beam installation construction method, and belongs to the technical field of building construction. The method is suitable for a flat roof, a light well steel structure to be installed is a rectangular steel beam, and the method comprises the steps that a steel structure beam is machined on the roof site, a steel structure beam transportation frame is manufactured, the transportation frame is debugged in place, the transportation frame is matched with a tower crane and a chain hoist to achieve transportation and accurate installation of the steel beam, and finally all the steel beams are installed from far to near. The installation problem of insufficient tower crane coverage in a plane roof light well area is solved through the customized transportation frame, a large crane is not needed, and the construction cost is reduced; the levelness error is definitely limited to be smaller than or equal to + / -2mm / m, weld joints need flaw detection, and the mounting quality is ensured; the transportation frame is stable in structure and convenient to operate, the installation efficiency is remarkably improved, and good practicability and economical efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a method for installing steel structure beams for light wells. Background Technology

[0002] Currently, more and more public buildings are using steel structure skylights. On-site installation is mostly done by cranes or tower cranes. Since public buildings have large spans, the skylights are often located in the middle of the structure, and tower cranes often cannot fully cover them, making it impossible to directly hoist the steel structure. If large cranes are used for installation, it will cause uneconomical on-site construction.

[0003] Therefore, how to install the steel structure beams of the skylight well under the premise of economical construction and when the tower crane range is insufficient has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The core objective of this invention is to provide a method for installing steel structure beams for light wells, which solves the problems of insufficient coverage of hoisting equipment and uneconomical construction in the prior art, and enables the installation of rectangular steel beams with a span of ≤12m on flat roofs with slopes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for installing steel beams for skylights, applicable to flat roofs, where the steel beams of the skylights to be installed are rectangular steel beams; the method includes the following steps:

[0007] Step S1: According to the dimensions and strength requirements of the design drawings, complete the processing and fabrication of multiple steel structure beams for the aforementioned skylights on the roof site;

[0008] Step S2: Fabricate a steel structure beam transport frame, which includes a crossbeam and support frames fixed below both sides of the crossbeam, and each support frame is equipped with casters.

[0009] Step S3: The steel structure beam transport frame is lifted to the designated working position on the roof by a tower crane, and manual hoists are fixed on both sides of the crossbeam of the steel structure beam transport frame with lifting straps. Then, the transport frame is tested and adjusted to ensure that it moves smoothly.

[0010] Step S4 involves transporting and installing the steel structure beams using the steel structure beam transport frame, specifically including:

[0011] Step S41, steel beam hoisting and positioning: using a tower crane, a finished light well steel structure beam is hoisted to the underside of the crossbeam of the steel structure beam transport frame, and the steel structure beam is firmly fixed to the hook of the manual hoist using hoisting straps;

[0012] Step S42, Steel beam transportation: The operator simultaneously pushes the steel structure beam transportation frame on both sides to transport the steel structure beam smoothly to the preset installation position;

[0013] Step S43, Precise installation and fixing: Operators on both sides operate the manual hoist simultaneously to adjust the installation height of the steel structure beam, and use a level to measure the levelness of the steel structure beam in real time. After the installation height and levelness meet the design requirements, the steel structure beam is welded and fixed to the roof embedded parts. After welding and fixing, the weld is inspected for flaws. The weld strength meets the construction quality acceptance specifications for steel structures.

[0014] Step S5: Repeat the operation of step S4 in order from farthest to near until all the steel structure beams of the light wells are installed.

[0015] In some embodiments, the method for manufacturing the steel structure beam transport frame specifically includes:

[0016] Step S21: Measure the actual span of the light well, accurately calculate the weight of the steel structure beam to be installed, draw the construction drawings of the steel structure beam transport frame based on the calculation results, and prepare the materials according to the construction drawings.

[0017] Step S22: Process the crossbeam of the steel structure beam transport frame, and the crossbeam is a truss structure;

[0018] Step S23: Weld the support frames on both sides. The support frames include an A-frame structure, and the A-frame structure is provided with a horizontal connecting beam along the height direction of the support frame.

[0019] Step S24: Install omnidirectional casters at the bottom of the support frame. Each side of the support frame is equipped with four omnidirectional casters, and the four omnidirectional casters on the same side are installed on the same horizontal plane.

[0020] Step S25: Weld and fix the support frames on both sides to the crossbeam to form a complete steel structure beam transport frame.

[0021] In some of these embodiments, the truss structure includes an upper chord, a lower chord, diagonal braces, and vertical members;

[0022] The upper chord is made of rectangular galvanized steel pipe, and the lower chord, diagonal brace and vertical bar are made of galvanized angle steel. All components are fixedly connected by welding.

[0023] In some embodiments, the bottom of the A-frame structure is connected to the casters via a rectangular frame.

[0024] In some embodiments, the rectangular frame is welded from rectangular galvanized steel pipes.

[0025] In some embodiments, the A-frame ladder structure includes a first support and a second support, which are fixedly connected together in an A-shape.

[0026] A horizontal connecting beam is fixed between the first support and the second support along the height direction of the A-frame structure.

[0027] In some of these embodiments, the horizontal connecting beams are evenly distributed along the height of the support frame, and the distance between adjacent horizontal connecting beams is no more than 1.8m.

[0028] In some embodiments, the span of the rectangular steel beam is no greater than 12m.

[0029] In some of these embodiments, the slope of the flat roof is no greater than 5%.

[0030] In some of these embodiments, the horizontality error of the steel structure beam installation in step S43 is ≤ ±2 mm / m.

[0031] Compared with the prior art, the above invention has at least one of the following advantages or beneficial effects:

[0032] 1) The steel structure beams for flat roofs and light wells are rectangular steel beams, which solves the installation problem of insufficient tower crane coverage in such scenarios, eliminating the need to use large cranes and significantly reducing construction costs.

[0033] 2) The steel beams are transported smoothly by using a customized steel structure beam transport frame with casters. The height can be precisely adjusted by a manual hoist, making operation convenient. Batch operations can be carried out in order from far to near, which significantly shortens the installation cycle.

[0034] 3) Clearly define the horizontality error as ≤ ±2mm / m, ensure that the weld strength meets the specifications and is subject to flaw detection, and ensure that the transport frame structure is reasonably designed to ensure the stability and accuracy of the steel structure beam installation. Attached Figure Description

[0035] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. In the full-layer drawings, the same reference numerals indicate the same layers. The drawings are not drawn to scale; the focus is on illustrating the gist of the invention.

[0036] Figure 1 This is a flowchart illustrating the installation and construction method of the steel structure beam for the light well in this embodiment of the invention.

[0037] Figure 2 This is a perspective view of the steel structure beam transport frame in an embodiment of the present invention;

[0038] Among them, 1. crossbeam; 2. A-frame structure; 21. support frame one; 22. support frame two; 23. horizontal connecting beam; 3. rectangular frame; 4. casters. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but these are not intended to limit the scope of the invention.

[0040] like Figure 1 As shown, this embodiment discloses a construction method for installing a steel structure beam for a light well, applicable to flat roofs with a slope ≤ 5%, where the steel structure of the light well to be installed is a rectangular steel beam with a span ≤ 12m; specifically, the construction method includes the following steps:

[0041] Step S1: According to the dimensions and strength requirements of the design drawings, complete the fabrication of multiple skylight steel structure beams on the roof site.

[0042] Step S2, fabricate a steel structure beam transport frame, such as Figure 2 As shown, the steel structure beam transport frame includes a crossbeam 1 and support frames fixed below both sides of the crossbeam 1, and each support frame is equipped with casters 4; the specific manufacturing method of the steel structure beam transport frame includes:

[0043] Step S21: Measure the actual span of the skylight, accurately calculate the weight of the steel structure beam to be installed, draw the construction drawings of the steel structure beam transport frame based on the calculation results, and prepare the materials according to the construction drawings.

[0044] Step S22: Process the crossbeam 1 of the steel structure beam transport frame, and the crossbeam 1 is a truss structure; the truss structure includes an upper chord, a lower chord, diagonal braces and vertical members; the upper chord is made of 100*50*3 Q235 rectangular galvanized steel pipe, and the lower chord, diagonal braces and vertical members are all made of 40*2 Q235 galvanized angle steel, and all components are fixedly connected by welding.

[0045] Step S23: Weld the support frames on both sides. The support frames include an A-frame structure 2. A rectangular frame 3 is fixed to the bottom of the A-frame structure 2. The A-frame structure 1 includes a first support 21 and a second support 22. The first support 21 and the second support 22 are fixedly connected together in an A-shape. Horizontal connecting beams 23 are fixed at intervals between the first support 21 and the second support 22 along the height direction of the A-frame structure. The horizontal connecting beams 23 are evenly distributed along the height direction of the support frame, and the distance between adjacent horizontal connecting beams 23 is not greater than 1.8m. The A-frame structure 1 uses 40*2 Q235 galvanized angle steel, and the rectangular frame 3 uses 100*50*3 Q235 galvanized angle steel.

[0046] Step S24: Install casters 4 at the bottom of the rectangular frame 3. Each side support frame is equipped with four casters 4, and the four casters 4 on the same side are on the same horizontal plane after installation.

[0047] Step S25: Weld and fix the two side support frames to the crossbeam 1 to form a complete steel structure beam transport frame.

[0048] Step S3: The steel structure beam transport frame is lifted to the designated working position on the roof using a tower crane. Manual hoists are then fixed on both sides of the crossbeam 1 of the steel structure beam transport frame using hoisting straps. The transport frame is then tested and adjusted to ensure smooth movement and stable operation.

[0049] Step S4 involves transporting and installing the steel structure beams using a steel structure beam transport frame, specifically including:

[0050] Step S41, steel beam hoisting and positioning: using a tower crane, a finished light well steel structure beam is hoisted to the underside of the crossbeam 1 of the steel structure beam transport frame, and the steel structure beam is firmly fixed to the hook of the manual hoist using hoisting straps;

[0051] Step S42, Steel beam transportation: The operator simultaneously pushes the steel structure beam transportation frame on both sides to transport the steel structure beam smoothly to the preset installation position;

[0052] Step S43, Precise Installation and Fixing: Operators on both sides simultaneously operate manual hoists to adjust the installation height of the steel structure beam, and use a level to measure the horizontality of the steel structure beam in real time. After the installation height and horizontality meet the design requirements, the steel structure beam is welded and fixed to the roof embedded parts. The weld strength meets the construction quality acceptance specifications for steel structures. The horizontality error of the steel structure beam installation is ≤±2mm / m. After welding and fixing, the weld is inspected to ensure that the welding quality meets the design and specification requirements.

[0053] Step S5: Repeat the operation of step 4 in order from farthest to near until all the steel structure beams of the light wells are installed.

[0054] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention and will not be elaborated here.

[0055] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A method for installing steel structure beams for light wells, applicable to flat roofs, wherein the steel structure of the light well to be installed is a rectangular steel beam; characterized in that, The construction method includes the following steps: Step S1: According to the dimensions and strength requirements of the design drawings, complete the processing and fabrication of multiple steel structure beams for the aforementioned skylights on the roof site; Step S2: Fabricate a steel structure beam transport frame, which includes a crossbeam and support frames fixed below both sides of the crossbeam, and each support frame is equipped with casters. Step S3: The steel structure beam transport frame is lifted to the designated working position on the roof by a tower crane, and manual hoists are fixed on both sides of the crossbeam of the steel structure beam transport frame with lifting straps. Then, the transport frame is tested and adjusted to ensure that it moves smoothly. Step S4 involves transporting and installing the steel structure beams using the steel structure beam transport frame, specifically including: Step S41, steel beam hoisting and positioning: using a tower crane, a finished light well steel structure beam is hoisted to the underside of the crossbeam of the steel structure beam transport frame, and the steel structure beam is firmly fixed to the hook of the manual hoist using hoisting straps; Step S42, Steel beam transportation: The operator simultaneously pushes the steel structure beam transportation frame on both sides to transport the steel structure beam smoothly to the preset installation position; Step S43, Precise installation and fixing: Operators on both sides simultaneously operate manual hoists to adjust the installation height of the steel structure beam, and use a level to measure the levelness of the steel structure beam in real time. After the installation height and levelness meet the design requirements, the steel structure beam is welded and fixed to the roof embedded parts. The weld strength meets the construction quality acceptance specifications for steel structures. Step S5: Repeat the operation of step S4 in order from farthest to near until all the steel structure beams of the light wells are installed.

2. The method for installing steel structure beams in a skylight well according to claim 1, characterized in that, The specific method for manufacturing the steel structure beam transport frame includes: Step S21: Measure the actual span of the light well, accurately calculate the weight of the steel structure beam to be installed, draw the construction drawings of the steel structure beam transport frame based on the calculation results, and prepare the materials according to the construction drawings. Step S22: Process the crossbeam of the steel structure beam transport frame, and the crossbeam is a truss structure; Step S23: Weld the support frames on both sides. The support frames include an A-frame structure, and the A-frame structure is provided with a horizontal connecting beam along the height direction of the support frame. Step S24: Install omnidirectional casters at the bottom of the support frame. Each side of the support frame is equipped with four omnidirectional casters, and the four omnidirectional casters on the same side are installed on the same horizontal plane. Step S25: Weld and fix the support frames on both sides to the crossbeam to form a complete steel structure beam transport frame.

3. The method for installing steel structure beams in a light well according to claim 2, characterized in that, The truss structure includes an upper chord, a lower chord, diagonal braces, and vertical members; The upper chord is made of rectangular galvanized steel pipe, and the lower chord, diagonal brace and vertical bar are made of galvanized angle steel. All components are fixedly connected by welding.

4. The method for installing steel structure beams in a light well according to claim 2, characterized in that, The bottom of the A-frame structure is connected to the casters via a rectangular frame.

5. The method for installing steel structure beams in a skylight well according to claim 4, characterized in that, The rectangular frame is welded from rectangular galvanized steel pipes.

6. The method for installing steel structure beams in a skylight well according to claim 4, characterized in that, The A-frame ladder structure includes a support frame one and a support frame two, which are fixedly connected together in an A-frame shape. A horizontal connecting beam is fixed between the first support and the second support along the height direction of the A-frame structure.

7. The method for installing steel structure beams in a skylight well according to claim 6, characterized in that, The horizontal connecting beams are evenly distributed along the height of the support frame, and the distance between adjacent horizontal connecting beams is no more than 1.8m.

8. The method for installing steel structure beams in a light well according to claim 1, characterized in that, The span of the rectangular steel beam is no more than 12m.

9. The method for installing steel structure beams in a skylight well according to claim 1, characterized in that, The slope of the flat roof shall not exceed 5%.

10. The method for installing steel structure beams in a light well according to claim 1, characterized in that, In step S43, the horizontality error of the steel structure beam installation is ≤ ±2mm / m, and the weld is inspected after welding and fixing.

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