CN115929081A - Temporary supporting and unloading device for top of steel truss column - Google Patents
Temporary supporting and unloading device for top of steel truss column Download PDFInfo
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- CN115929081A CN115929081A CN202211701248.1A CN202211701248A CN115929081A CN 115929081 A CN115929081 A CN 115929081A CN 202211701248 A CN202211701248 A CN 202211701248A CN 115929081 A CN115929081 A CN 115929081A
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Abstract
The invention provides a temporary supporting and unloading device for a column top of a steel truss, belongs to the technical field of steel structure buildings, and aims to solve the problem that a jack temporary supporting and unloading structure in the prior art cannot adjust the position of a supporting surface according to a specific structure of a special-shaped steel structure building, so that the steel truss is not prone to toppling. The invention comprises a horizontal displacement device, an inclination angle conversion device and a supporting and unloading device; the horizontal displacement device comprises a fixed slide rail and a sliding support beam, the fixed slide rail is fixedly arranged on the ground or a fixed building body, the sliding support beam is perpendicular to the fixed slide rail and can slide along the fixed slide rail, the inclination angle conversion device comprises a bottom plate, six hydraulic oil cylinders and a top plate, a conversion plate is arranged on the supporting surface of the steel truss, and the conversion plate is fixedly connected with the top plate; the supporting and unloading device comprises four upright posts, a jack mounting plate, a sliding platform and jacks, the top ends of the jacks are supported against the bottom of the sliding platform, and the bottom plate is fixedly mounted at the top of the sliding platform.
Description
Technical Field
The invention belongs to the technical field of steel structure buildings, and particularly relates to a temporary supporting and unloading device for a steel truss column top.
Background
In the construction process of the space steel truss structure, temporary supports are usually erected by steel column members in the member installation stage, and after the upper steel truss structure is installed, the temporary supports are dismantled by gas cutting according to a certain sequence, so that the original height is reduced, and the unloading purpose is achieved. The process of dismantling the temporary support is the process of transforming the structural system, and the main structure is gradually transformed from a partial load-bearing state to a complete load-bearing state.
The steel column is used as a temporary support, a sandbox or a jack is placed on the top of the steel column, and the tool is used for supporting the structure in the installation process. Before unloading, the steel columns are removed, supported only by sandboxes or jacks, and slowly unloaded until the structure itself bears the weight. Because the structure only has a structure supported by a sandbox or a jack in the unloading process, and no other auxiliary measures are provided, the structure is only suitable for the condition of simple unloading in the vertical direction. In the unloading process, the tool cannot bear horizontal load, and the structure cannot have horizontal displacement.
Scheme 1: the Chinese invention patent with the publication number CN106284668B discloses a method for installing a large-span large-space steel structure roof truss, which adopts the technology of large-span truss sectional hoisting and truss accumulated sliding, and comprises the following concrete steps: a. the method comprises the following steps that (1) n truss assembling jig frames are erected on the horizontal ground at one end below a roof truss installation position, and the n truss assembling jig frames are distributed at equal intervals along the width direction of a roof; b. splicing n +1 sub-trusses on the truss splicing jig frame through a TCR6055 tower crane to form a whole truss; c. the two ends of the whole truss are fixedly connected with the sliding rails through sliding support devices, the sliding tool is connected with the sliding support devices, the whole truss is slid to a truss installation area through the sliding tool, and after the truss reaches the installation area, sliding unloading is carried out, so that column feet of the whole truss fall into embedded part inner anchor bolts; assembling a second truss on the truss assembling jig frame through a TCR6055 tower crane while sliding the truss, and additionally assembling a steel beam between the first truss and the roof beam through a tower crane B; d. and (c) after the second truss is assembled, sequentially assembling and sliding the trusses by adopting the sectional hoisting and sliding method in the step (c), and additionally assembling the steel beams among the trusses by using a tower crane B until the last truss is completely slid, and additionally assembling the steel beams among the trusses by using the tower crane B, so that the roof truss construction is completed. The technical problem that the tool cannot be horizontally loaded and the structure cannot have horizontal displacement in the unloading process of the steel truss is solved by the scheme. However, this solution is not suitable for the construction of profiled steel structures.
Scheme 2: the Chinese invention patent with publication number CN112900692B discloses 'a large-span special-shaped steel structure building and a supporting device and a construction method thereof', wherein the large-span special-shaped steel structure building comprises: the steel frame-shear wall structure system is provided with an upward inclined column, the inclined column faces to the outer vertical surface of the steel frame-shear wall structure system from bottom to top, and the inclination angle of the inclined column to the vertical direction is 18.1-53.28 degrees; and a plurality of groups of inclined columns are arranged on the outer vertical surface of the steel frame-shear wall structure system.
In the scheme 1, the supporting surface of the steel truss can only be arranged at the bottom of the steel truss, and the sliding unloading specifically comprises the steps that (1) after the whole truss is slid in place, two 10t grading jacks are respectively used at two ends to jack the truss sliding unit away from the pushing sliding tool; (2) unloading the sliding unit by 10 jacks; (3) The truss is slowly lowered by adjusting the height of the jack, so that the column base of the truss falls into an anchor bolt in the embedded part, and the anchor bolt is fastened. However, in case of the construction with the profile steel structure of the scheme 2 or other types, because the profile steel structure has inclined vertical surfaces, the vertical stress of the steel truss is not uniformly distributed along a plane, namely the stress of each supporting surface of the steel truss is different.
Therefore, the scheme 1 has the following technical problems: firstly, the position of the supporting surface cannot be adjusted according to the specific structure of the special-shaped steel structure building in the scheme 1, so that the steel truss is not easy to topple; secondly, the jacks in the scheme 1 are stressed unevenly, so that the jack synchronous unloading device is required to have higher precision and feedback speed; scheme 1 is only applicable to simple support condition, and the form of every holding surface frock is all the same promptly, is not applicable to the dysmorphism structure.
Disclosure of Invention
The invention aims to solve the technical problems and provides a temporary supporting and unloading device for the top of a steel truss column, so that the steel truss can adjust the tool form of each supporting surface, the supporting surface of the steel truss can be arranged on an inclined column of an inclined vertical surface of the steel truss, and the steel truss is not easy to topple when horizontally unloaded.
In order to achieve the purpose, the invention adopts the following technical scheme:
the temporary supporting and unloading device for the top of the steel truss column comprises a horizontal displacement device, an inclination angle conversion device and a supporting and unloading device; the horizontal displacement device comprises a fixed slide rail and a sliding support beam, the fixed slide rail is fixedly arranged on the ground or a fixed building body, and the sliding support beam is perpendicular to the fixed slide rail and can slide along the fixed slide rail; the dip angle conversion device comprises a bottom plate, six hydraulic oil cylinders and a top plate, wherein the six hydraulic oil cylinders are arranged in groups two by two and are three groups in total, each hydraulic oil cylinder is arranged in an inverted V shape and comprises a cylinder sleeve and a piston rod, the cylinder sleeves are connected with the piston rods in a sliding manner, oil cavities are arranged in the hydraulic oil cylinders, the three hydraulic oil cylinders are uniformly arranged along the circumferential direction, the upper ends of the piston rods of the hydraulic oil cylinders are hinged at the bottom end of the top plate through hinge balls, the lower ends of the cylinder sleeves of the hydraulic oil cylinders are hinged at the upper end of the bottom plate through the hinge balls, hinge ball mounting grooves for mounting the hinge balls are respectively arranged on the top plate and the bottom plate, the top of the top plate is arranged as a supporting surface of a steel truss, a conversion plate is arranged at the supporting surface of the steel truss, and the conversion plate is fixedly connected with the top plate; support uninstallation device includes four stands, jack mounting panel, sliding platform and jack, and four fixed settings of stand are in sliding support beam's front and back both sides, jack mounting panel fixed mounting is on four stands and the jack mounting panel supports sliding support beam is last, and sliding platform is equipped with the sliding sleeve on four angles, and four sliding sleeves establish respectively on four stands, and the jack is installed on the jack mounting panel, the top of jack is in sliding platform's bottom, bottom plate fixed mounting be in sliding platform's top.
As a preferred technical scheme, a plurality of sliding support beams are arranged along the fixed slide rail, each sliding support beam is fixedly connected to a sliding support plate through a connecting part with adjustable height, each sliding support beam is relatively fixed, and a plurality of groups of inclination angle conversion devices and supporting and unloading devices are arranged along the sliding support beams.
As a preferred technical scheme, the sliding platform further comprises two cross beams and eight triangular connecting plates for connecting the sliding sleeve and the cross beams, wherein the two cross beams are made of i-shaped steel, the sliding sleeve comprises a rib plate extending into the space between an upper flange and a lower flange of the cross beam, and the triangular connecting plates are fixedly connected with the outer wall of the sliding sleeve and the upper flange/the lower flange of the cross beam.
As a preferred technical scheme, the connecting part is arranged at the left end and the right end of the sliding support beam and comprises a support steel frame and two diagonal draw bars, the upper end and the lower end of the support steel frame are respectively and fixedly connected to the bottom end of the sliding support beam and the sliding support plate, the two diagonal draw bars are arranged in a splayed shape, and the upper end and the lower end of each diagonal draw bar are respectively and fixedly connected to the bottom end of the sliding support beam and the sliding support plate.
As a preferred technical scheme, four the bottom of stand still fixed mounting has the stand mounting panel, stand mounting panel fixed mounting be in sliding support roof beam's bottom.
As a preferred technical scheme, six bolt holes are uniformly formed in the top plate along the circumferential direction, the bolt holes pass through the perpendicular planes of two adjacent hinge ball mounting grooves in the top plate, and the top plate and the conversion plate are fixedly connected after the bolt holes penetrate through the bolt holes.
As a preferred technical solution, the supporting and unloading device is provided with two or four jacks, the axes of which are coplanar with the web of the beam.
After the technical scheme is adopted, the invention has the following advantages:
(1) According to the temporary supporting and unloading device for the top of the steel truss column, the fixed slide rail and the sliding support beam are adopted to realize horizontal displacement of the steel truss during unloading, and when the steel truss is horizontally displaced, the temporary supporting and unloading device for the top of the steel truss column is connected with the steel truss through the inclination angle conversion device, the inclination angle conversion device is provided with an inclination angle inclined relative to a horizontal plane, and the upper end and the lower end of each of the six hydraulic cylinders are of a hinged ball structure, so that the device can bear horizontal load during horizontal displacement of the steel truss.
(2) According to the temporary supporting and unloading device for the top of the steel truss column, the inclination angle conversion device can change the inclination angle of the top plate by controlling the strokes of the six hydraulic oil cylinders, so that the supporting surface of the steel truss can be automatically adjusted in six freedom directions, and the temporary supporting and unloading device can be applied to temporary supporting and unloading of the steel truss of a special-shaped steel structure building.
The six degrees of freedom comprise rotational degree of freedom and displacement degree of automation along a X, Y, Z shaft, wherein the displacement degree of automation along a X, Y, Z shaft is used for fine adjustment of a supporting surface, so that under the condition that the temporary supporting and unloading device for the top of the steel truss column has installation errors, the top plate is tightly attached to the conversion plate of the steel truss by adjusting the strokes of six hydraulic oil cylinders, and the use performance and the turnover performance of the structure are improved.
In addition, the horizontal position of the supporting surface is adjusted through the back-and-forth movement of the sliding supporting beam along the sliding rail, and the vertical position of the supporting surface is adjusted through the height of the supporting steel frame of the sliding supporting beam, the installation height of the upright post relative to the sliding supporting beam and the installation height of the sliding platform.
(3) The temporary supporting and unloading device for the top of the steel truss column can adjust the position of the supporting surface according to the specific structure of the special-shaped steel structure building, so that the steel truss is not easy to topple.
Drawings
Fig. 1 is a schematic structural view of a temporary supporting and unloading device for the top of a steel truss column;
FIG. 2 is a schematic structural view of the inclination angle conversion device and the supporting and unloading device;
FIG. 3 is a schematic structural diagram of the tilt angle switching device;
in the figure:
1-fixing a slide rail; 2-sliding the support beam; 3-upright post; 4-jack mounting plate; 5-a sliding platform; 51-a sliding sleeve; 52-a cross beam; 53-triangular connecting plates; 6-a bottom plate; 7-a hydraulic oil cylinder; 71-cylinder liner; 72-a piston rod; 8-a top plate; 9-sliding the support plate; 10-supporting a steel frame; 11-diagonal draw bars; 12-column mounting plate.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples.
As shown in fig. 1 to 3, the temporary supporting and unloading device for the top of a steel truss column includes: horizontal displacement device, inclination conversion device and support uninstallation device.
The horizontal displacement device comprises a fixed slide rail 1 and a sliding support beam 2, wherein the fixed slide rail 1 is fixedly arranged on the ground or a fixed building body, and the sliding support beam 2 is vertical to the fixed slide rail 1 and can slide along the fixed slide rail 1. In this embodiment, the fixed slide rail 1 is formed by two steel structure beams arranged in parallel.
The fixed slide rail 1 is provided with a plurality of sliding support beams 2, each sliding support beam 2 is fixedly connected to a sliding support plate 9 through a connecting part with adjustable height, each sliding support beam 2 is relatively fixed, and the sliding support beam 2 is provided with a plurality of groups of inclination angle conversion devices and supporting unloading devices.
The connecting parts are arranged at the left end and the right end of the sliding support beam 2 and comprise a support steel frame 10 and two inclined pull rods 11. The upper end and the lower end of the supporting steel frame 10 are respectively fixedly connected to the bottom end of the sliding supporting beam 2 and the sliding supporting plate 9, the two diagonal draw bars 11 are arranged in a splayed shape, and the upper end and the lower end of each diagonal draw bar 11 are respectively fixedly connected to the bottom end of the sliding supporting beam 2 and the sliding supporting plate 9. The height of the connecting part can be adjusted through the supporting steel frames 10 with different heights, so that the installation height of the sliding supporting beam 2 can be adjusted.
The supporting and unloading device comprises four upright posts 3, a jack mounting plate 4, a sliding platform 5 and jacks. Four stands 3 are fixed to be set up sliding support beam 2's front and back both sides, jack mounting panel 4 fixed mounting is on four stands 3, and four stands 3 set up four summit positions at the rectangle. The jack mounting plate 4 is horizontally arranged. The mounting position of the jack mounting plate 4 is set according to the height of the steel truss supporting surface to be unloaded, and is generally set in the middle of the four upright posts 3. Four there is a column mounting panel 12 bottom still fixed mounting of stand 4, column mounting panel 12 fixed mounting be in sliding support beam 2's bottom. In this embodiment, the jack mounting plate 4 is supported on the sliding support beam 2. It should be understood that the jack mounting plate 4 may be not mounted on the sliding support beam 2, but the mounting position on the upright 3 may be adjusted according to the height of the steel truss bottom support surface supported by the column top.
The slide platform 5 includes four slide bushes 51, two cross beams 52, and eight triangular link plates 53 connecting the slide bushes 51 and the cross beams 52. The four sliding sleeves 51 are respectively sleeved on the four upright posts 3, and the sliding sleeves 51 can slide up and down along the upright posts 3. Both cross beams 52 are i-steel and the sliding sleeve 51 comprises ribs extending between the upper and lower flanges of the cross beams 52. The triangular connecting plate 53 fixedly connects the outer wall of the sliding sleeve 51 and the upper/lower flange of the cross member 52.
The jack is installed on the jack mounting plate 4, the top end of the jack is propped against the bottom of the sliding platform 5, and the inclination angle conversion device is fixedly installed at the top of the sliding platform 5. Two or four jacks are provided, the axes of which are coplanar with the web of the cross-beam 52. The pressure of the steel truss against the tilt angle conversion device is transmitted to the cross beam 52 and then to the jack through the web of the cross beam 52.
The inclination conversion device comprises a bottom plate 6, six hydraulic oil cylinders 7 and a top plate 8. The bottom plate 6 is fixedly arranged in the middle of the tops of the two cross beams 52. Four groups of bolt holes are arranged at four corners of the bottom plate 6, and the diameter of each bolt hole is 27mm, so that the M24 high-strength bolts can be installed. Every two of six hydraulic cylinder 7 set up as a set of, three groups altogether, and every hydraulic cylinder 7 of group is the setting of falling V-arrangement.
Each hydraulic oil cylinder 7 comprises a cylinder sleeve 71 and a piston rod 72, the cylinder sleeve 71 is connected with the piston rod 72 in a sliding mode, and an oil cavity is formed inside each hydraulic oil cylinder 7. The three groups of hydraulic oil cylinders 7 are uniformly arranged along the circumferential direction, the upper ends of piston rods 72 of the hydraulic oil cylinders 7 are hinged at the bottom end of the top plate 8 through hinge balls, and the lower ends of cylinder sleeves 71 of the hydraulic oil cylinders 7 are hinged at the upper end of the bottom plate 6 through hinge balls. The top plate 8 and the bottom plate 6 are respectively provided with a hinge ball mounting groove for mounting each hinge ball.
Six bolt holes are uniformly formed in the top plate 8 of the inclination angle conversion device along the circumferential direction, and the diameter of each bolt hole is 27mm, so that the M24 high-strength bolt can be installed. The bolt holes pass through the vertical surfaces of the two adjacent hinge ball mounting grooves on the top plate 8, and the top plate 8 and the conversion plate are fixedly connected after the bolts pass through the bolt holes. The top plate 8 is fixedly connected with a conversion plate at the bottom supporting surface of the steel truss supported by the column top.
Claims (7)
1. The temporary supporting and unloading device for the top of the steel truss column is characterized by comprising a horizontal displacement device, an inclination angle conversion device and a supporting and unloading device; the horizontal displacement device comprises a fixed slide rail and a sliding support beam, the fixed slide rail is fixedly arranged on the ground or a fixed building body, and the sliding support beam is perpendicular to the fixed slide rail and can slide along the fixed slide rail; the dip angle conversion device comprises a bottom plate, six hydraulic cylinders and a top plate, wherein the six hydraulic cylinders are arranged in pairs in a group, and three groups are formed, each group of hydraulic cylinders are arranged in an inverted V shape, each hydraulic cylinder comprises a cylinder sleeve and a piston rod, the cylinder sleeves are connected with the piston rods in a sliding manner, oil cavities are formed in the hydraulic cylinders, the three groups of hydraulic cylinders are uniformly arranged along the circumferential direction, the upper ends of the piston rods of the hydraulic cylinders are hinged to the bottom end of the top plate through hinge balls, the lower ends of the cylinder sleeves of the hydraulic cylinders are hinged to the upper end of the bottom plate through the hinge balls, hinge ball mounting grooves for mounting the hinge balls are respectively formed in the top plate and the bottom plate, the top of the top plate is arranged as a supporting point of a steel truss, a conversion plate is arranged at the supporting point of the steel truss, and the conversion plate is fixedly connected with the top plate; support uninstallation device includes four stands, jack mounting panel, sliding platform and jack, and four fixed settings of stand are in sliding support beam's front and back both sides, jack mounting panel fixed mounting is on four stands and the jack mounting panel supports sliding support beam is last, and sliding platform is equipped with the sliding sleeve on four angles, and four sliding sleeves establish respectively on four stands, and the jack is installed on the jack mounting panel, the top of jack is in sliding platform's bottom, bottom plate fixed mounting be in sliding platform's top.
2. The temporary support and unloading device for the top of a steel truss column according to claim 1, wherein a plurality of said sliding support beams are provided along said fixed slide rails, each of said sliding support beams is fixedly connected to a sliding support plate by means of a connecting member capable of adjusting the height thereof, each of said sliding support beams is relatively fixed, and a plurality of sets of said inclination angle changing means and support unloading device are provided along said sliding support beams.
3. The steel truss column top temporary support and offloading device of claim 1, wherein the skid platform further comprises two beams and eight triangular connecting plates connecting the skid sleeve and the beams, both beams being i-steel, the skid sleeve comprising ribs extending between the upper and lower flanges of the beams, the triangular connecting plates fixedly connecting the outer wall of the skid sleeve with the upper/lower flanges of the beams.
4. The steel truss column top temporary supporting and unloading device according to claim 2, wherein the connecting members are disposed at left and right ends of the sliding support beam, the connecting members include a support steel frame and two diagonal draw bars, upper and lower ends of the support steel frame are respectively fixedly connected to the bottom end of the sliding support beam and the sliding support plate, the two diagonal draw bars are arranged in a splayed shape, and upper and lower ends of the diagonal draw bars are respectively fixedly connected to the bottom end of the sliding support beam and the sliding support plate.
5. The steel truss column top temporary supporting and unloading device as claimed in claim 1, wherein column mounting plates are further fixedly mounted at the bottom ends of the four columns, and the column mounting plates are fixedly mounted at the bottom ends of the sliding support beams.
6. The temporary supporting and unloading device for the top of the steel truss column as claimed in claim 1, wherein six bolt holes are uniformly formed in the top plate along the circumferential direction, the bolt holes pass through the midperpendicular surfaces of two adjacent hinge ball mounting grooves on the top plate, and the top plate and the transfer plate are fixedly connected after passing through the bolt holes by bolts.
7. Temporary support and unloading device for steel truss column tops according to claim 3, wherein the support and unloading device is provided with two or four jacks, the axes of which are coplanar with the web of the beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211701248.1A CN115929081A (en) | 2022-12-29 | 2022-12-29 | Temporary supporting and unloading device for top of steel truss column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211701248.1A CN115929081A (en) | 2022-12-29 | 2022-12-29 | Temporary supporting and unloading device for top of steel truss column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115929081A true CN115929081A (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211701248.1A Pending CN115929081A (en) | 2022-12-29 | 2022-12-29 | Temporary supporting and unloading device for top of steel truss column |
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| Country | Link |
|---|---|
| CN (1) | CN115929081A (en) |
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2022
- 2022-12-29 CN CN202211701248.1A patent/CN115929081A/en active Pending
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