Shear construction method of the weld connecting the column top support and the steel column

Abstract

The present invention relates to a shear construction method for the connection weld between a column top support and a steel column, belonging to the technical field of steel structure, the column top support and the steel column connection structure includes a steel roof structure frame, a frame column is arranged below the steel roof structure frame, a supporting steel column is arranged between the frame column and the steel roof structure frame, an embedded part integrally cast with the frame column is arranged between the supporting steel column and the frame column, a support rod frame is arranged between the supporting steel column and the steel roof structure frame, and an anti-seismic support is arranged between the support rod frame and the supporting steel column, and between the embedded part and the supporting steel column. It has the characteristics of simple measures, easy operation, safety and reliability. The temporary support system around the structural supporting column is unloaded, and the steel column is adaptively compressed to ensure that the bottom support of the steel column and the embedded part are tightly compacted, and then the connection weld between the support and the embedded part is welded to ensure that the weld is sheared but not compressed.

Description

Technical Field

[0001] The invention relates to the technical field of steel structures, and in particular to a shear construction method for a welding seam connecting a column top support and a steel column. Background Art

[0002] With the rapid development of the domestic economy, the structural and functional requirements of large steel structure buildings are constantly increasing, and the difficulty of structural design is also increasing. Its complex and diverse design requirements lead to increasing construction difficulties. For example, the design of the supporting columns of large steel roof structures, according to the force characteristics, meets the force requirements of the overall structure through reasonable freedom release, but it also causes certain difficulties in construction. Summary of the invention

[0003] The present invention mainly solves the deficiencies in the prior art and provides a shear construction method for the connection weld between the column top support and the steel column. The method has the characteristics of simple measures, easy operation, safety and reliability. The temporary support system around the structural support column is unloaded, and the steel column is adaptively compressed to ensure that the bottom support of the steel column and the embedded parts are tightly compacted. Subsequently, the connection weld between the support and the embedded parts is welded to ensure that the weld is subjected to shear force but not pressure.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] A method for shearing the connection weld between a column top support and a steel column, wherein the connection structure between the column top support and the steel column comprises a steel roof structure frame, a frame column is arranged below the steel roof structure frame, a supporting steel column is arranged between the frame column and the steel roof structure frame, an embedded part cast in an integral manner with the frame column is arranged between the supporting steel column and the frame column, a support rod frame is provided between the supporting steel column and the steel roof structure frame, and anti-seismic bearings are arranged between the support rod frame and the supporting steel column and between the embedded part and the supporting steel column.

[0006] The construction method is as follows:

[0007] Step 1: Process embedded parts, seismic bearings and supporting steel columns.

[0008] Step 2: When pouring frame columns, it is necessary to control the horizontality of embedded parts. According to the axes around the periphery and the elevation control piles, after re-measurement and closure, combined with the drawing dimensions, the control points are projected to the frame columns of the construction layer.

[0009] Step 3: The steel roof structure frame is installed by lifting and hoisting, and reserved assembly holes are reserved. When the steel roof structure frame is installed, the temporary support points are assembled simultaneously to ensure that the installation of the steel roof structure frame meets the elevation and height structure support.

[0010] Step 4: Install the seismic bearings and embedded parts at the bottom of the supporting steel column.

[0011] Step 5: Lift and install the supporting steel column into place, ensuring that there is no vertical deviation in the supporting steel column.

[0012] Step 6: After the supporting steel column is installed in place, install the seismic bearing on the upper part of the supporting steel column, and then supplement the support rod frame of the seismic bearing. The seismic bearing is connected and fixed to the steel roof structure frame through the support rod frame.

[0013] Step 7: Unload the temporary support points around the supporting steel columns.

[0014] Step 8: The supporting steel columns are adaptively loaded after internal force redistribution to ensure that the supporting steel columns and seismic bearings, and the seismic bearings and embedded parts are compacted and tightened using the original load of the structure.

[0015] Step 9: After ensuring that the top is tightened, proceed with the welding work of the weld. At this time, the weld of the seismic support is only subjected to shear force.

[0016] Preferably, the top of the embedded parts, the bottom plate and top plate of the seismic bearing and the bottom plate of the supporting steel column are finely processed to ensure flatness.

[0017] As a preferred method, set up a theodolite on the control point and use the rectangular coordinate method to lay out the longitudinal and transverse axes of each support, locate and lay out the anchor bolts, measure and set the control lines of the plane position and the bottom elevation lines, draw ink lines on the measured axes, and then measure and verify the dimensions between adjacent columns.

[0018] As a preferred option, the axis is verified to be correct and a red painted triangle mark is drawn as a basis for centering when the support bolts are in place; two theodolites are used to command the longitudinal and transverse axes respectively, so that the positioning steel plate moves parallel to the crosshairs of the telescope, and it is not allowed to only move the center point of the longitudinal and transverse axes of the steel plate to the crosshairs of the telescope and only rotate the positioning steel plate.

[0019] As a preference, due to the height difference between the support and the operating platform, firstly determine the points to be inspected in the embedded area, then use a total station to inspect and recheck the elevation, lateral and longitudinal deviations.

[0020] As a preference, the horizontality of embedded parts is checked and accepted with a protractor or ruler.

[0021] Preferably, two laser theodolites are placed on two mutually perpendicular axes of the column base for controlling the verticality of the steel column. The line of sight is projected onto a target pre-fixed on the steel column. The center of the light beam is perpendicular to the center of the target. The horizontal disk of the theodolite is rotated at least three times. If the projected points all coincide, it indicates that there is no deviation in the verticality of the steel column.

[0022] The present invention can achieve the following effects:

[0023] The present invention provides a shear construction method for the connection weld between the column top support and the steel column. Compared with the prior art, the method has the characteristics of simple measures, easy operation, safety and reliability. The temporary support system around the structural support column is unloaded, and the steel column is adaptively compressed to ensure that the bottom support of the steel column and the embedded parts are tightly compacted. Subsequently, the connection weld between the support and the embedded parts is welded to ensure that the weld is subjected to shear force but not pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the steel column supporting structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the installation of the steel roof structure frame of the present invention.

[0026] Figure 3 It is a schematic diagram of the installation of the supporting steel column of the present invention.

[0027] Figure 4 It is a schematic diagram of the installation of the support rod frame of the present invention.

[0028] Figure 5 It is a schematic diagram of the temporary support point of the present invention after unloading.

[0029] In the figure: steel roof structure frame 1, seismic bearing 2, supporting steel column 3, embedded parts 4, frame column 5, temporary support point 6, reserved assembly hole 7, support rod frame 8. DETAILED DESCRIPTION

[0030] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0031] Example: Figure 1-5 As shown, a shear construction method for the connection weld between the column top support and the steel column is provided, and the connection structure between the column top support and the steel column includes a steel roof structure frame 1, a frame column 5 is provided below the steel roof structure frame 1, a supporting steel column 3 is provided between the frame column 5 and the steel roof structure frame 1, an embedded part 4 cast in an integral manner with the frame column 5 is provided between the supporting steel column 3 and the frame column 5, a support rod frame 8 is provided between the supporting steel column 3 and the steel roof structure frame 1, and an anti-seismic bearing 2 is provided between the support rod frame 8 and the supporting steel column 3 and between the embedded part 4 and the supporting steel column 3.

[0032] The construction method includes the following steps:

[0033] Step 1: Processing embedded parts 4, seismic bearings 2 and supporting steel columns 3. Finish the top of embedded parts 4, the bottom plate and top plate of seismic bearings 2 and the bottom plate of supporting steel columns 3 to ensure flatness.

[0034] Step 2: When pouring the frame column 5, it is necessary to control the horizontality of the embedded part 4. According to the axis lines around the periphery and the elevation control piles, after repeated measurement and closure, combined with the drawing dimensions, the control points are projected to the frame column 5 of the construction layer. The horizontality of the embedded part 4 is checked and accepted with a square and a ruler.

[0035] At the control point, set up the theodolite and use the rectangular coordinate method to lay out the longitudinal and transverse axes of each support, locate and lay out the anchor bolts, measure and set the control lines of the plane position and the bottom elevation lines, draw ink lines on the measured axes, and then measure the distances to verify the dimensions between adjacent columns.

[0036] After the axis is verified to be correct, a red painted triangle mark is drawn as a basis for centering when the support bolts are in place; two theodolites are used to command the longitudinal and transverse axes respectively, so that the positioning steel plate moves parallel to the crosshairs of the telescope. It is not allowed to only move the center point of the longitudinal and transverse axes of the steel plate to the crosshairs of the telescope and only rotate the positioning steel plate.

[0037] Due to the height difference between the support and the operating platform, first determine the points to be inspected in the embedded area, and then use a total station to check and recheck the elevation, lateral and longitudinal deviations.

[0038] Step 3: The steel roof structure frame 1 is installed by lifting and hoisting and reserved assembly holes 7 are reserved. When the steel roof structure frame 1 is installed, the temporary support points 6 are assembled simultaneously to ensure that the installation of the steel roof structure frame 1 meets the support of the elevation and height structure.

[0039] Step 4: Install the seismic support 2 and embedded parts 4 at the bottom of the supporting steel column 3;

[0040] Step 5: The supporting steel column 3 is lifted and installed in place, and it is necessary to ensure that there is no vertical deviation of the supporting steel column 3. The verticality of the steel column is controlled by placing two laser theodolites on two mutually perpendicular axes of the column base, and the line of sight is projected onto the target pre-fixed on the steel column. The center of the light beam is perpendicular to the center of the target, and the horizontal disc of the theodolite is rotated at least 3 times. If the projected points are all coincident, it indicates that there is no deviation in the verticality of the steel column.

[0041] Step 6: After the supporting steel column 3 is installed in place, the seismic bearing 2 on the upper part of the supporting steel column 3 is installed, and the support rod frame 8 of the seismic bearing 2 is supplemented, and the seismic bearing 2 is connected and fixed to the steel roof structure frame 1 through the support rod frame 8.

[0042] Step 7: Unload the temporary support points 6 around the supporting steel columns 3.

[0043] Step 8: The supporting steel column 3 is adaptively loaded after internal force redistribution to ensure that the supporting steel column 3 and the seismic bearing 2, and the seismic bearing 2 and the embedded part 4 are compacted and tightened by the original load of the structure.

[0044] Step 9: After ensuring that the top is tightened, proceed with the welding work of the weld. At this time, the weld of the seismic support 2 is only subjected to shear force.

[0045] In summary, the shear construction method of the connecting weld between the column top support and the steel column has the characteristics of simple measures, easy operation, safety and reliability. The temporary support system around the structural support column is unloaded, and the steel column is adaptively compressed to ensure that the bottom support of the steel column and the embedded parts are tightly compacted. Subsequently, the connecting weld between the support and the embedded parts is welded to ensure that the weld is subjected to shear force but not pressure.

[0046] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A shear construction method for the connection weld between a column top support and a steel column, characterized in that: The column top support and the steel column connection structure comprises a steel roof structure frame (1), a frame column (5) is provided below the steel roof structure frame (1), a supporting steel column (3) is provided between the frame column (5) and the steel roof structure frame (1), an embedded part (4) cast in an integral manner with the frame column (5) is provided between the supporting steel column (3) and the frame column (5), a support rod frame (8) is provided between the supporting steel column (3) and the steel roof structure frame (1), and an anti-seismic support (2) is provided between the support rod frame (8) and the supporting steel column (3) and between the embedded part (4) and the supporting steel column (3); The construction method includes the following steps: Step 1: Processing embedded parts (4), seismic bearings (2) and supporting steel columns (3); Step 2: When pouring the frame column (5), it is necessary to control the horizontality of the embedded part (4). According to the axis lines around the periphery and the elevation control piles, after repeated measurement and closure, the control points are projected to the frame column (5) of the construction layer in combination with the drawing dimensions; Step 3: The steel roof structure frame (1) is installed by lifting and hoisting and reserved assembly holes (7). When the steel roof structure frame (1) is installed, the temporary support points (6) are assembled simultaneously to ensure that the steel roof structure frame (1) is installed in accordance with the support of the elevation and height structure; Step 4: Install the seismic support (2) and embedded parts (4) at the bottom of the supporting steel column (3); Step 5: The supporting steel column (3) is lifted and installed in place, and it is necessary to ensure that the supporting steel column (3) has no vertical deviation; Step 6: After the supporting steel column (3) is installed in place, the seismic support (2) on the upper part of the supporting steel column (3) is installed, and the support rod frame (8) of the seismic support (2) is supplemented, and the seismic support (2) is connected and fixed to the steel roof structure frame (1) through the support rod frame (8); Step 7: Unloading the temporary support points (6) around the supporting steel column (3); Step 8: The supporting steel column (3) is adaptively loaded after internal force redistribution, so as to ensure that the supporting steel column (3) and the seismic support (2), and the seismic support (2) and the embedded part (4) are compacted and tightened by the original load of the structure; Step 9: After ensuring that the top is tight, the welding work of the weld is carried out. At this time, the weld of the seismic support (2) is only subjected to shear force.

2. The shear construction method for the connection weld between the column top support and the steel column according to claim 1 is characterized in that: The supporting steel column (3) and the seismic support (2), and the seismic support (2) and the embedded part (4) are ensured to be tightly pressed together, and the top of the embedded part (4), the bottom plate and top plate of the seismic support (2) and the bottom plate of the supporting steel column (3) are finely processed to ensure flatness.

3. The shear construction method for the connection weld between the column top support and the steel column according to claim 1 is characterized in that: The horizontality of the embedded part (4) shall be checked and accepted with a protractor and a ruler.

4. The shear construction method for the connection weld between the column top support and the steel column according to claim 1 is characterized in that: The verticality of the supporting steel column (3) is controlled by placing two laser theodolites on two mutually perpendicular axes of the column base. The line of sight is projected onto a target pre-fixed on the supporting steel column (3). The center of the light beam is perpendicular to the center of the target. The horizontal circle of the theodolite is rotated at least three times. If all the projected points coincide, it indicates that there is no deviation in the verticality of the supporting steel column (3).

Images