Method for installing cold-rolled steel structural column

Abstract

This invention provides a method for installing cold-rolled steel structure columns, belonging to the field of steel structure construction technology. The method involves constructing grout blocks at the four corners of the base corresponding to the bottom fixing plate of the steel structure column. Two inclined pads are placed on top of the grout blocks, with their lower ends facing each other. The inclined surface of the outer pad faces downwards, and the inclined surface of the inner pad faces upwards. The inclined surface of the outer pad overlaps the inclined surface of the inner pad, so that the top surface of the outer pad forms a load-bearing support surface for the steel structure column. During the installation of the steel structure column, the horizontal and vertical alignment of the column can be quickly and precisely adjusted by adjusting the overlapping position of the two inclined pads at the four corners of the bottom of the column. This allows for one-time installation, ensuring the required installation accuracy, and the construction process is simple, effectively improving the installation efficiency of the steel structure column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure construction, more particularly to a cold-rolled steel structure column installation method. BACKGROUND

[0002] The cold-rolled process is an advanced steel processing technology, and the steel structure column is a basic structure for supporting pipelines and key equipment, and the installation quality and efficiency of the steel structure column directly affect the operation effect of the entire process.

[0003] The steel column has large single-piece size and weight, and high installation precision, and the allowable deviation of the center line of the column foot base from the positioning axis is generally 2.0 mm; the column body height deviation is generally ±2.0 mm; the allowable deviation of the column body perpendicularity is generally 0.5 mm / m, and the full height is not greater than 6.0 mm; and the allowable deviation of the column diagonal is generally 5.0 mm. In the construction process, it is necessary to ensure the accurate position of the four foundation bolts and ensure that the foundation bolts are not deviated during the pouring process, especially the position of the foundation bolts is not changed during the concrete pouring process.

[0004] The traditional method for installing the steel structure column is to adjust the level and height of the steel column by adjusting the height of the foundation bolt nut, and repeated adjustment is required to meet the installation requirements, which is inconvenient to operate and has low adjustment efficiency. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide a cold-rolled steel structure column installation method to solve the problem of the traditional steel structure column installation method in the prior art, which needs to adjust the level and height of the steel column by repeatedly adjusting the height of the foundation bolt nut, and is inconvenient to operate and has low adjustment efficiency.

[0006] The cold-rolled steel structure column installation method provided by the present application comprises the following steps:

[0007] Based on the preset drawing and the position of the foundation bolt on the base, the position of the chock at the four corners of the fixed plate at the bottom of the steel structure column is determined, and the chock is constructed at the chock position;

[0008] After the chock reaches the preset strength requirement, two inclined pads are placed on the top of the chock, the low ends of the two inclined pads are oppositely arranged, the inclined surface of the inclined pad on the outer side faces downward, the inclined surface of the inclined pad on the inner side faces upward, and the inclined surface of the inclined pad on the outer side is arranged on the inclined surface of the inclined pad on the inner side, so that the top surface of the inclined pad on the outer side forms a stress support surface for the steel structure column;

[0009] The steel structure column is vertically lifted, the preset bolt hole on the fixed plate is sleeved on the foundation bolt, and the four corners of the fixed plate are placed on the stress support surface;

[0010] Align the centerline of the steel structure column with the centerline of the base, and adjust the horizontality and verticality of the steel structure column with precision by adjusting the position of the inclined shim.

[0011] After the horizontality and verticality of the steel structure column meet the preset accuracy requirements, the inclined pad is fixed, and the anchor bolts and the fixing plate are fixedly connected by nuts to fix the position of the steel structure column.

[0012] The steel structure columns, which are in fixed positions, are poured to complete the installation of the steel structure columns.

[0013] Furthermore, a preferred embodiment is that the construction method for the grout block includes:

[0014] A connecting plate with screw holes is fixed at the middle of at least three sides of a pre-designed rectangular pad;

[0015] The screw hole of the connecting plate is fitted onto the bolt that is pre-fixed at the position of the slurry block, and nuts are fitted onto the bolt above and below the connecting plate;

[0016] The elevation and level of the rectangular pad are adjusted to meet the preset requirements, and the connecting plate is fixed to the bolt by the nut.

[0017] According to the size requirements of the grout block, a template is set up on the outer periphery of the rectangular pad, and grout is poured into the template to obtain the grout block.

[0018] In addition, a preferred embodiment is that the connecting plate is welded and fixed to the rectangular pad.

[0019] Furthermore, a preferred embodiment is that the number of connecting plates is equal to the number of bolts pre-fixed at the slurry block position.

[0020] Furthermore, in a preferred embodiment, the preset requirements for the elevation and levelness of the rectangular pad are as follows:

[0021] The deviation between the top surface elevation of the rectangular pad and the preset pad elevation is less than 2mm;

[0022] The deviation between the horizontality of the rectangular pad and the preset horizontality of the pad is less than 0.8 mm / m.

[0023] Furthermore, a preferred embodiment includes, after grouting and pouring into the template to obtain a grout block, the following steps are also taken:

[0024] The bolts above the top of the slurry block are cut off using a grinding wheel.

[0025] Furthermore, a preferred embodiment is that during the process of vertically hoisting the steel structure column, aligning the pre-set bolt holes of the fixing plate with the anchor bolts, and placing the four corners of the fixing plate on the load-bearing support surface,

[0026] The steel structure column is lifted by a crane, and the hook is slowly raised while the column is slowly rotated to ensure that it is lifted vertically.

[0027] Furthermore, a preferred embodiment is a method for aligning the centerline of the steel structure column with the centerline of the base, comprising:

[0028] Mark the longitudinal and transverse center lines of the steel structure column on the top surface of the base with ink lines;

[0029] When the ink line formed on the top surface of the base coincides with the center line of the base, it is determined that the center line of the steel structure column is aligned with the center line of the base.

[0030] Furthermore, a preferred approach is to adjust the levelness and verticality of the steel structure column with precision by adjusting the position of the inclined pads.

[0031] The verticality of the steel structure column is detected by a theodolite, and the horizontality of the steel structure column is detected by a level.

[0032] Based on the test results of the verticality and horizontality of the steel structure column, the horizontality and verticality of the steel structure column are adjusted with precision by adjusting the overlapping position of the two inclined pads.

[0033] Furthermore, a preferred embodiment is that the method for fixing the inclined pad is as follows:

[0034] The inclined pad is fixed to the rectangular pad of the slurry block by spot welding.

[0035] As can be seen from the above technical solution, the cold-rolled steel structure column installation method provided by the present invention involves constructing grout blocks on the base corresponding to the four corners of the bottom fixing plate of the steel structure column, and then placing two inclined pads on top of the grout blocks. The lower ends of the two inclined pads are set opposite each other, with the inclined surface of the outer inclined pad facing down and the inclined surface of the inner inclined pad facing up. The inclined surface of the outer inclined pad overlaps the inclined surface of the inner inclined pad, so that the top surface of the outer inclined pad forms a force-bearing support surface for the steel structure column. During the installation of the steel structure column, by adjusting the overlapping position of the two inclined pads at the four corners of the bottom of the steel structure column, the horizontality and verticality of the steel structure column can be quickly and precisely adjusted. After the horizontality and verticality of the steel structure column meet the preset accuracy requirements, the position of the inclined pads is fixed and the fixing plate of the steel structure column is fixed to the anchor bolts with nuts. This achieves one-time molding installation, ensures the installation accuracy requirements, and the construction process is simple, effectively improving the installation efficiency of the steel structure column.

[0036] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0037] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention.

[0038] Figure 1 This is a flowchart of a cold-rolled steel structure column installation method according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the construction of a rectangular pad according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of a rectangular pad supporting a template according to an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure after the grout block construction according to an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the installation of a steel structure column according to an embodiment of the present invention.

[0043] In the attached drawings, 1-base, 2-anchor bolt, 3-steel structure column, 31-fixing plate, 311-preset bolt hole, 4-grout block, 41-rectangular pad, 42-connecting plate, 43-bolt, 44-nut, 45-template, 5-sloping pad.

[0044] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0045] In response to the aforementioned issue that the traditional steel structure column installation method in the existing technology requires repeated adjustment of the height of the anchor bolts and nuts to adjust the level and height of the steel column, which is inconvenient to operate and has low adjustment efficiency, a cold-rolled steel structure column installation method is proposed.

[0046] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0047] To illustrate the cold-rolled steel structure column installation method provided by this invention Figure 1 The flowchart of a cold-rolled steel structure column installation method according to an embodiment of the present invention is shown; Figure 2 A rectangular pad construction structure according to an embodiment of the present invention is shown; Figure 3 A rectangular pad support template structure according to an embodiment of the present invention is shown; Figure 4 The structure after grout block construction according to an embodiment of the present invention is shown; Figure 5 A steel column mounting structure according to an embodiment of the present invention is shown.

[0048] like Figures 1 to 5 As shown in the figure, the cold-rolled steel structure column installation method provided by the present invention includes the following steps:

[0049] Step S1: Based on the preset drawings and the position of the anchor bolts 2 on the base 1, determine the positions of the grout blocks at the four corners of the fixing plate 31 at the bottom of the steel structure column 3, and construct the grout blocks 4 at the grout block positions;

[0050] Step S2: After the grout block 4 reaches the preset strength requirement, place two inclined pads 5 opposite each other on the top of the grout block 4. The lower ends of the two inclined pads 5 are set opposite each other, with the inclined surface of the outer inclined pad 5 facing down and the inclined surface of the inner inclined pad 5 facing up. The inclined surface of the outer inclined pad 5 is laid on the inclined surface of the inner inclined pad 5 so that the top surface of the outer inclined pad 5 forms a force-bearing support surface for the steel structure column 3.

[0051] Step S3: Vertically lift the steel structure column 3 so that the pre-set bolt holes 311 on the fixing plate 31 are fitted onto the anchor bolts 2, and place the four corners of the fixing plate 31 on the load-bearing support surface.

[0052] Step S4: Align the centerline of the steel structure column 3 with the centerline of the base 1, and adjust the horizontality and verticality of the steel structure column 3 with precision by adjusting the position of the inclined shim 5.

[0053] Step S5: After the horizontality and verticality of the steel structure column 3 meet the preset accuracy requirements, fix the inclined pad 5, and fix the anchor bolt 2 and the fixing plate 31 with nuts to fix the position of the steel structure column 3.

[0054] Step S6: Cast concrete for the fixed-position steel structure column 3 to complete the installation of the steel structure column.

[0055] By constructing grout blocks 4 at the four corners of the fixing plate 31 corresponding to the bottom of the steel structure column 3 on the base 1, and then placing two inclined pads 5 on top of the grout blocks 4, with the lower ends of the two inclined pads 5 facing each other, the inclined surface of the outer inclined pad 5 facing down, and the inclined surface of the inner inclined pad 5 facing up, the inclined surface of the outer inclined pad 5 overlapping the inclined surface of the inner inclined pad 5, so that the top surface of the outer inclined pad 5 forms a force-bearing support surface for the steel structure column 3. During the installation of the steel structure column 3, by adjusting the overlapping position of the two inclined pads 5 at the four corners of the bottom of the steel structure column 3, the horizontality and verticality of the steel structure column 3 can be quickly and precisely adjusted. After the horizontality and verticality of the steel structure column 3 meet the preset accuracy requirements, the position of the inclined pads 5 is fixed and the fixing plate 31 of the steel structure column 3 is fixed to the anchor bolts 2 with nuts, which can achieve one-time molding installation, ensure the installation accuracy requirements, and the construction process is simple, effectively improving the installation efficiency of the steel structure column.

[0056] As a preferred embodiment of the present invention, the construction method of the slurry block 4 includes:

[0057] A connecting plate 42 with screw holes is fixed at the middle of at least three sides of a pre-set rectangular pad 41;

[0058] The screw hole of the connecting plate 42 is fitted onto the bolt 43 that is pre-fixed at the position of the slurry block. Nuts 44 are fitted onto the bolt 43 above and below the connecting plate 42.

[0059] The elevation and level of the rectangular pad 41 are adjusted to meet the preset requirements, and the connecting plate 42 is fixed to the bolt 43 by the nut 44.

[0060] According to the size requirements of the grout block, a template 45 is set up on the outer periphery of the rectangular pad 41, and grout is poured into the template 45 to obtain the grout block.

[0061] Specifically, based on the pre-designed drawings, bolts 43 are pre-embedded on the base 1 (foundation). According to the number and position of the pre-embedded bolts 43, a connecting plate 42 with screw holes is fixed on the side of the rectangular pad 41. At least three sides of the rectangular pad 41 are welded with pre-embedded bolts 43 to ensure that the rectangular pad 41 is firmly fixed. The screw holes of the connecting plate 42 are fitted onto the bolts 43. Before fitting, a nut is fitted onto the bolt 43. After the screw holes are fitted onto the bolt 43, another nut is fitted onto the bolt 43, so that nuts 44 are fitted onto the bolt 43 above and below the connecting plate 42 to fix the connecting plate 42, thereby fixing the rectangular pad 41. The preferred dimensions of the rectangular pad 41 are 120mm in length, 70mm in width, and 14mm in height; the preferred diameter of the bolt 43 is 7mm; the connecting plate 42 is preferably fitted onto the bolt 43 at 1 / 3 of its length. The rectangular pad 41 is installed at a specified height measured from a horizontal reference using a level. At the same time, the level of the rectangular pad 41 in all directions is adjusted using a level. When the elevation and level of the rectangular pad 41 meet the preset requirements, the connecting plate 42 is fixed to the bolt 43 using a nut 44. Then, according to the grout block size requirements, a template 45 is erected on the outer periphery of the rectangular pad 41, and grout is poured into the template 45 to obtain the grout block.

[0062] As a preferred embodiment of the present invention, the connecting plate 42 is welded and fixed on the rectangular pad 41.

[0063] Specifically, the connection between the two can be made more secure by welding the connecting plate 42.

[0064] As a preferred embodiment of the present invention, the number of connecting plates 42 is equal to the number of bolts 43 pre-fixed at the position of the slurry block.

[0065] Specifically, the connecting plate 42 and bolt 43 can be pre-designed based on the drawings, with one bolt 43 corresponding to one connecting plate 42.

[0066] As a preferred embodiment of the present invention, the preset requirements for the elevation and levelness of the rectangular pad 41 are as follows:

[0067] The deviation between the top surface elevation of the rectangular pad 41 and the preset pad elevation is less than 2mm;

[0068] The deviation between the horizontality of the rectangular pad 41 and the preset horizontality of the pad is less than 0.8 mm / m.

[0069] Specifically, the top surface elevation deviation of the rectangular pad 41 is within -2mm, and the allowable deviation of the levelness is 0.8mm / m. After the adjustment is completed, the template 45 is used to support the formwork, with the support height being flush with the rectangular pad 41. Then, the grout is poured. The width of the grout block 4 is 30mm wider than the rectangular pad 41 on one side, and the length is 20mm longer than the rectangular pad on one side. The thickness can be determined according to the site requirements.

[0070] As a preferred embodiment of the present invention, after grouting is poured into the template 45 to obtain the grout block 4, the method further includes:

[0071] The bolt 43 above the top of the slurry block 4 is cut off with a grinding wheel so that the top surface of the bolt 43 is flush with the top surface of the slurry block 4.

[0072] As a preferred embodiment of the present invention, during the process of vertically hoisting the steel structure column 3, fitting the pre-set bolt holes 311 of the fixing plate 31 onto the anchor bolts 2, and placing the four corners of the fixing plate 31 on the load-bearing support surface,

[0073] The steel structure column 3 is lifted by a crane, and the hook is slowly raised and rotated slowly to make the steel structure column 3 vertically lifted.

[0074] Specifically, the preferred method for hoisting steel structure column 3 is single-machine rotation. When the crane lifts steel structure column 3, it slowly lifts the hook and slowly rotates to make steel structure column 3 vertical, keeping the column base plate 400mm to 600mm from the ground. The crane arm is then slowly rotated until steel structure column 3 is above the foundation (base 1).

[0075] As a preferred embodiment of the present invention, the method for aligning the centerline of the steel structure column 3 with the centerline of the base 1 includes:

[0076] Mark the longitudinal and transverse center lines of the steel structure column 3 on the top surface of the base 1 with ink lines;

[0077] When the ink line formed on the top surface of the base 1 coincides with the center line of the base 1, it is determined that the center line of the steel structure column 3 is aligned with the center line of the base 1.

[0078] Specifically, before installing steel structure column 3, the centerline of steel structure column 3 needs to be checked. The longitudinal and transverse centerlines of steel structure column 3 are marked with ink lines on the top surface of the foundation. The distance from the centerline to the cup opening of base 1 is measured to see if it is greater than 1 / 2 the width of steel structure column 3. The bottom elevation of base 1 (foundation) and the bottom elevation of column base plate are measured to see if they meet the requirements.

[0079] As a preferred embodiment of the present invention, during the process of adjusting the levelness and verticality of the steel structure column 3 by adjusting the position of the inclined shim 5,

[0080] The verticality of steel structure column 3 was checked using a theodolite, and the horizontality of steel structure column 3 was checked using a level.

[0081] Based on the test results of the verticality and horizontality of the steel structure column 3, the horizontality and verticality of the steel structure column 3 are adjusted with precision by adjusting the overlapping position of the two inclined pads 5.

[0082] As a preferred embodiment of the present invention, the method for fixing the inclined pad 5 is as follows:

[0083] The inclined pad 5 is fixed to the rectangular pad 41 of the slurry block 4 by spot welding.

[0084] Specifically, after the grouting concrete reaches the design strength of the foundation concrete after 48 hours, two inclined pads 5 are placed on top of the grout block. The preferred dimensions of the inclined pads 5 are 100mm in length, 60mm in width, and 21mm and 13mm in height on both sides, respectively. The two inclined pads 5 are then tapped with a wrench to allow them to bear force. After the steel structure column 3 is precisely adjusted, the inclined pads 5 are spot-welded to fix them to the rectangular pad 41 of the grout block 4.

[0085] As can be seen from the above specific embodiments, the cold-rolled steel structure column installation method provided by the present invention involves constructing grout blocks on the base corresponding to the four corners of the bottom fixing plate of the steel structure column, and then placing two inclined pads on top of the grout blocks. The lower ends of the two inclined pads are set opposite each other, with the inclined surface of the outer inclined pad facing down and the inclined surface of the inner inclined pad facing up. The inclined surface of the outer inclined pad overlaps the inclined surface of the inner inclined pad, so that the top surface of the outer inclined pad forms a force-bearing support surface for the steel structure column. During the installation of the steel structure column, by adjusting the overlapping position of the two inclined pads at the four corners of the bottom of the steel structure column, the horizontality and verticality of the steel structure column can be quickly and precisely adjusted. After the horizontality and verticality of the steel structure column meet the preset accuracy requirements, the position of the inclined pads is fixed and the fixing plate of the steel structure column is fixed to the anchor bolts with nuts. This achieves one-time molding installation, ensures the installation accuracy requirements, and the construction process is simple, effectively improving the installation efficiency of the steel structure column.

[0086] The method for installing cold-rolled steel structure columns according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the method for installing cold-rolled steel structure columns according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A method for installing cold-rolled steel structure columns, characterized in that, Includes the following steps: Based on the pre-designed drawings and the positions of the anchor bolts on the base, the positions of the grout blocks at the four corners of the fixing plate at the bottom of the steel structure column are determined, and the grout blocks are installed at these positions; the installation method of the grout blocks includes: A connecting plate with screw holes is fixed to the middle of at least three sides of a pre-set rectangular pad; the screw holes of the connecting plate are fitted onto bolts pre-fixed at the position of the grout block, and nuts are fitted onto the bolts above and below the connecting plate; the elevation and level of the rectangular pad are adjusted to meet the pre-set requirements, and the connecting plate is fixed to the bolts with the nuts; according to the size requirements of the grout block, a template is erected on the outer periphery of the rectangular pad, and grout is poured into the template to obtain the grout block; Once the grout block reaches the preset strength requirement, two inclined pads are placed opposite each other on top of the grout block, with the lower ends of the two inclined pads facing each other. The inclined surface of the outer inclined pad faces downward, and the inclined surface of the inner inclined pad faces upward. The inclined surface of the outer inclined pad rests on the inclined surface of the inner inclined pad, so that the top surface of the outer inclined pad forms a force-bearing support surface for the steel structure column. The steel structure column is vertically hoisted, and the pre-set bolt holes on the fixing plate are fitted onto the anchor bolts. The four corners of the fixing plate are placed on the load-bearing support surface. Align the centerline of the steel structure column with the centerline of the base, and adjust the horizontality and verticality of the steel structure column with precision by adjusting the position of the inclined shim. After the horizontality and verticality of the steel structure column meet the preset accuracy requirements, the inclined pad is fixed, and the anchor bolts and the fixing plate are fixedly connected by nuts to fix the position of the steel structure column. The steel structure columns, which are in fixed positions, are poured to complete the installation of the steel structure columns.

2. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, The connecting plate is welded and fixed to the rectangular pad.

3. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, The number of connecting plates is equal to the number of bolts pre-fixed at the position of the grout block.

4. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, The preset requirements for the elevation and levelness of the rectangular pad are as follows: The deviation between the top surface elevation of the rectangular pad and the preset pad elevation is less than 2mm; The deviation between the horizontality of the rectangular pad and the preset horizontality of the pad is less than 0.8 mm / m.

5. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, After grouting is poured into the template to obtain grout blocks, the process further includes: The bolts above the top of the slurry block are cut off using a grinding wheel.

6. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, During the process of vertically hoisting the steel structure column, aligning the pre-set bolt holes of the fixing plate with the anchor bolts, and placing the four corners of the fixing plate on the load-bearing support surface, The steel structure column is lifted by a crane, and the hook is slowly raised while the column is slowly rotated to ensure that it is lifted vertically.

7. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, A method for aligning the centerline of the steel structure column with the centerline of the base includes: Mark the longitudinal and transverse center lines of the steel structure column on the top surface of the base with ink lines; When the ink line formed on the top surface of the base coincides with the center line of the base, it is determined that the center line of the steel structure column is aligned with the center line of the base.

8. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, During the process of adjusting the position of the inclined pads to ensure the accuracy of the horizontal and vertical alignment of the steel structure column, The verticality of the steel structure column is detected by a theodolite, and the horizontality of the steel structure column is detected by a level. Based on the test results of the verticality and horizontality of the steel structure column, the horizontality and verticality of the steel structure column are adjusted with precision by adjusting the overlapping position of the two inclined pads.

9. The method for installing cold-rolled steel structure columns according to claim 1, characterized in that, The method for fixing the inclined pad is as follows: The inclined pad is fixed to the rectangular pad of the slurry block by spot welding.

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