Remedial connecting structure for dislocation of anchor bolt foundation and steel column foot

Abstract

The utility model relates to a remedial connecting structure for dislocation of an anchor bolt foundation and a steel column base, which comprises a first foundation, a second foundation, a first steel column, a second steel column and a steel beam, and the center distance between the first foundation and the second foundation is larger than that between a first column base bottom plate and a second column base bottom plate; the first lower anchor bolt is connected with the first end of the steel beam through the first connecting assembly, and the first column foot bottom plate is fixed to the top face of the steel beam. The second column base bottom plate is fixed to the top face of the second end of the steel beam, and the second lower anchor bolt is connected with the second end of the steel beam and the second column base bottom plate through a second connecting assembly. Or, the second end of the steel beam is fixed to the side face of the second steel column, the second column base bottom plate is placed on the top face of the second foundation, and the second lower anchor bolt is connected with the second column base bottom plate through a third connecting assembly. The utility model can effectively solve the problem that the column foot anchor bolt and the column foot bottom plate cannot be installed due to large error caused by dislocation.

Description

Remedial connection structure for misalignment between anchor bolt foundation and steel column base. Technical Field

[0001] This utility model relates to the field of building steel structures, and in particular to a remedial connection structure for misalignment between anchor bolt foundation and steel column base. Background Technology

[0002] With the rapid pace of technological advancements, particularly in industries like machinery, metallurgy, petrochemicals, and power, where equipment iteration (update) cycles are approximately 10 years, this falls far short of the full lifespan of building structures. Therefore, upgrading and renovating existing building structures is more in line with development requirements. Steel structures, characterized by high strength and good toughness, are widely used in industrial sectors for supporting factory buildings and auxiliary pipelines.

[0003] Public auxiliary scaffolding typically uses exposed column bases, which are primarily connected using anchor bolts (also known as column base bolts or column base anchors). As force-transmitting components of the foundation and steel columns, the installation accuracy and quality of these anchor bolts play a crucial role in the structural safety of the superstructure. Due to the high precision requirements of steel structure fabrication, on-site construction and installation often fail to meet these requirements. Therefore, the main steel structure is usually fabricated in a factory and directly installed on-site. Consequently, in renovation and expansion projects (or even during installation), if the anchor bolt foundation is misplaced, the concrete anchor bolt foundation must be demolished and reconstructed, significantly impacting the construction schedule and causing unnecessary financial waste. Summary of the Invention

[0004] The purpose of this utility model is to provide a remedial connection structure for misalignment between anchor bolt foundation and steel column base, which can effectively solve the problem that the anchor bolt and column base plate cannot be installed due to large errors caused by misalignment.

[0005] The purpose of this utility model is achieved as follows: a remedial connection structure for misalignment between anchor bolt foundation and steel column base includes a first foundation, a second foundation, a first steel column, a second steel column, and a steel beam. A first lower anchor bolt is provided on the first foundation, and a second lower anchor bolt is provided on the second foundation. A first column base plate is connected to the bottom of the first steel column, and a second column base plate is connected to the bottom of the second steel column. The center-to-center distance between the first and second foundations is greater than the center-to-center distance between the first and second column base plates. Both ends of the steel beam can overlap the top surfaces of the first and second foundations. The first lower anchor bolt is connected to the first end of the steel beam via a first connecting assembly. The first column base plate is fixed to the top surface of the steel beam and located between the two ends of the steel beam. The second column base plate is fixed to the top surface of the second end of the steel beam, and the second lower anchor bolt is connected to the second end of the steel beam and the second column base plate via a second connecting assembly. Alternatively, the second end of the steel beam is fixed to the side of the second steel column, the second column base plate is placed on the top surface of the second foundation, and the second lower anchor bolt is connected to the second column base plate via a third connecting assembly.

[0006] In a preferred embodiment of the present invention, the steel beam is an H-beam and includes an upper flange plate, a lower flange plate and a web plate. The web plate is vertically arranged, the lower flange plate abuts against the top surface of the first foundation and the second foundation, and the first column base plate is fixed on the upper flange plate.

[0007] In a preferred embodiment of the present invention, the first connecting assembly includes a first lower nut, a first connecting nut, a first upper anchor bolt, and a first upper nut. The upper end of the first lower anchor bolt passes through the lower flange plate and is fixed to the lower flange plate by the first lower nut. The upper end of the first lower anchor bolt is also connected to the lower end of the first upper anchor bolt by the first connecting nut. The upper end of the first upper anchor bolt passes through the upper flange plate and is fixed to the upper flange plate by the first upper nut.

[0008] In a preferred embodiment of the present invention, the first connecting assembly further includes a first lower steel pad and a first upper steel pad. The first lower steel pad is sleeved on the first lower anchor bolt and sandwiched between the lower flange plate and the first lower nut. The first upper steel pad is sleeved on the first upper anchor bolt and sandwiched between the upper flange plate and the first upper nut.

[0009] In a preferred embodiment of the present invention, the first connecting assembly further includes a first intermediate nut, which is sleeved on the lower part of the first upper anchor bolt and can abut against the upper end of the first connecting nut; the first lower nut and the first intermediate nut are both single nuts, and the first upper nut is a double nut.

[0010] In a preferred embodiment of the present invention, the second column base plate is fixed on the upper flange plate, and the second connecting assembly includes a second lower nut, a second connecting nut, a second upper anchor bolt, and a second upper nut. The upper end of the second lower anchor bolt passes through the lower flange plate and is fixed to the lower flange plate by the second lower nut. The upper end of the second lower anchor bolt is also connected to the lower end of the second upper anchor bolt by the second connecting nut. The upper end of the second upper anchor bolt passes through the upper flange plate and the second column base plate and is fixed to the second column base plate by the second upper nut.

[0011] In a preferred embodiment of the present invention, the second connecting assembly further includes a second lower steel pad and a second upper steel pad. The second lower steel pad is sleeved on the second lower anchor bolt and sandwiched between the lower flange plate and the second lower nut. The second upper steel pad is sleeved on the second upper anchor bolt and sandwiched between the second column base plate and the second upper nut.

[0012] In a preferred embodiment of the present invention, the second connecting assembly further includes a second intermediate nut, which is sleeved on the lower part of the second upper anchor bolt and can abut against the upper end of the second connecting nut; the second lower nut and the second intermediate nut are both single nuts, and the second upper nut is a double nut.

[0013] In a preferred embodiment of the present invention, the second end of the steel beam is fixed to the side of the second steel column by an end plate, the third connecting component includes a third nut and a third steel pad, and the upper end of the second lower anchor bolt passes through the second column base plate and the third steel pad in sequence and is fixed to the second column base plate by the third nut.

[0014] In a preferred embodiment of this utility model, the remedial connection structure further includes a first shear-resistant member and a second shear-resistant member. The top of the first foundation is provided with a first shear-resistant groove, and the top of the second foundation is provided with a second shear-resistant groove. The first shear-resistant member is fixed to the bottom of the first end of the steel beam and can be accommodated in the first shear-resistant groove. The second shear-resistant member is fixed to the bottom of the second end of the steel beam and can be accommodated in the second shear-resistant groove. Alternatively, the second shear-resistant member is fixed to the bottom of the second column base plate and can be accommodated in the second shear-resistant groove.

[0015] In a preferred embodiment of the present invention, a first stiffening rib is provided on the web plate at the position corresponding to the first shear member, and an intermediate stiffening rib is provided on the web plate at the position corresponding to the first steel column; when the second column base plate is fixed on the upper flange plate, a second stiffening rib is provided on the web plate at the position corresponding to the second shear member.

[0016] In a preferred embodiment of this utility model, both the first steel column and the second steel column are H-beams; the webs of the first steel column and the webs of the second steel column are perpendicular to the web of the steel beam, and the base plate of the second column is fixed to the upper flange plate; or, the webs of the first steel column and the webs of the second steel column are parallel to the web of the steel beam and are arranged directly opposite the web of the steel beam, and the second end of the steel beam is fixed to one of the flange plates of the second steel column.

[0017] In a preferred embodiment of the present invention, web stiffening ribs are provided on both sides of the bottom of the web of the first steel column and the second steel column; and / or, flange stiffening ribs are provided on the outer sides of the bottom of the two flange plates of the first steel column and the second steel column.

[0018] As described above, the remedial connection structure of this utility model provides a remedy that greatly reduces additional engineering work when there is a misalignment between the anchor bolt foundation and the steel column base. By adding a steel beam as a force-transferring component to the foundation, the load borne by the superstructure is safely transferred to the foundation. It can flexibly accommodate a large misalignment between the column base plate and the anchor bolt head, solving the problem of the inability to install the anchor bolt and column base plate due to reasons such as inconvenient piling areas, renovation and expansion projects, and design drawings. Attached Figure Description

[0019] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0020] Figure 1 is a schematic diagram of the remedial connection structure provided by this utility model when the two steel columns adopt the first installation method described above.

[0021] Figure 2 is a magnified view of a portion of the first end of the steel beam in Figure 1.

[0022] Figure 3 is a magnified view of the second end of the steel beam in Figure 1.

[0023] Figure 4 is a cross-sectional view of AA in Figure 1.

[0024] Figure 5 is a cross-sectional view of BB in Figure 1.

[0025] Figure 6 is a cross-sectional view of CC in Figure 1.

[0026] Figure 7 is a cross-sectional view of DD in Figure 1.

[0027] Figure 8 is a cross-sectional view of EE in Figure 1.

[0028] Figure 9 is a schematic diagram of the first prefabricated steel support after the first shear member has been removed and before the column base has been cut.

[0029] Figure 10 is a schematic diagram of the first finished steel support after the column base has been cut.

[0030] Figure 11 is a schematic diagram of the structure after the first finished steel bracket has a height of H removed from the column base.

[0031] Figure 12 is a schematic diagram showing the repair of the cut-off column base portion in Figure 9 by welding it to the bottom of the steel column in Figure 11.

[0032] Figure 13 is a schematic diagram of welding the new steel support structure shown in Figure 12 onto the steel beam.

[0033] Figure 14 is a schematic diagram of the remedial connection structure provided by this utility model when the two steel columns adopt the second installation method described above.

[0034] Figure 15 is a magnified view of the second base in Figure 14.

[0035] Explanation of icon numbers:

[0036] 1. First foundation; 11. First lower anchor bolt; 12. First connecting assembly; 121. First lower steel pad; 1211. Through hole; 122. First lower nut; 123. First connecting nut; 124. First intermediate nut; 125. First upper anchor bolt; 126. First upper steel pad; 1261. Through hole; 127. First upper nut; 13. First shear groove;

[0037] 2. Second foundation; 21. Second lower anchor bolt; 22. Second connecting assembly; 221. Second lower steel pad; 222. Second lower nut; 223. Second connecting nut; 224. Second intermediate nut; 225. Second upper anchor bolt; 226. Second upper steel pad; 2261. Through hole; 227. Second upper nut; 23. Third connecting assembly; 231. Third steel pad; 232. Third nut; 24. Second shear groove;

[0038] 3. First steel column; 31. First column base plate;

[0039] 4. Second steel column; 41. Second column base plate; 411. Mounting hole;

[0040] 5. Steel beam; 51. Upper flange plate; 511. First upper mounting hole; 52. Lower flange plate; 521. First lower mounting hole; 53. Web plate; 531. First stiffening rib; 532. Intermediate stiffening rib; 533. Second stiffening rib; 54. End plate;

[0041] 6. First shear-resistant component;

[0042] 7. Second shear member;

[0043] 81. Stiffening ribs on the web; 82. Stiffening ribs on the flange. Detailed Implementation

[0044] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0045] As shown in Figures 1 to 15, this application provides a remedial connection structure for misalignment between anchor bolt foundation and steel column base, including a first foundation 1, a second foundation 2, a first steel column 3, a second steel column 4, and a steel beam 5. A first lower anchor bolt 11 is provided on the first foundation 1, and a second lower anchor bolt 21 is provided on the second foundation 2. A first column base plate 31 is connected to the bottom of the first steel column 3, and a second column base plate 41 is connected to the bottom of the second steel column 4. The center distance between the first foundation 1 and the second foundation 2 is greater than the center distance between the first column base plate 31 and the second column base plate 41. The two ends of the steel beam 5 can overlap the top surfaces of the first foundation 1 and the second foundation 2. The first lower anchor bolt 11 is connected to the first end of the steel beam 5 through a first connecting component 12. The first column base plate 31 is fixed on the top surface of the steel beam 5 and located between the two ends of the steel beam 5.

[0046] The connection between the second steel column 4 and the steel beam 5 can be in two forms. The first form is that the second column base plate 41 is fixed on the top surface of the second end of the steel beam 5, and the second lower anchor bolt 21 is connected to the second end of the steel beam 5 and the second column base plate 41 through the second connecting component 22. The second form is that the second end of the steel beam 5 is fixed on the side of the second steel column 4, the second column base plate 41 is placed on the top surface of the second foundation 2, and the second lower anchor bolt 21 is connected to the second column base plate 41 through the third connecting component 23.

[0047] Therefore, this application provides a remedial measure that can greatly reduce the amount of additional engineering work in the case of misalignment between the anchor bolt foundation and the steel column base. By adding a steel beam 5 as a force-transferring component to the foundation, the load borne by the superstructure is safely transferred to the foundation. It can flexibly accommodate the large misalignment between the column base plate and the column base anchor head (i.e., the upper end of the anchor bolt installed on the foundation), and solves the problem that the column base anchor bolt and column base plate cannot be installed due to reasons such as inconvenient piling areas, renovation and expansion projects, and design drawings.

[0048] In the specific implementation, the steel beam 5 is an H-beam and includes an upper flange plate 51, a lower flange plate 52 and a web plate 53. The surface of the web plate 53 is vertically arranged, the lower flange plate 52 abuts against the top surface of the first foundation 1 and the second foundation 2, and the first column base plate 31 is fixed on the upper flange plate 51.

[0049] The steel beam 5 is arranged horizontally along its length. The first foundation 1 and the second foundation 2, which are also the anchor bolt foundations, are concrete columns. The first lower anchor bolt 11 and the second lower anchor bolt 21 are fixed to the foundation after the concrete column is poured. The first column base plate 31 and the second column base plate 41 are generally rectangular plates.

[0050] Furthermore, to facilitate the connection and fixation of the first lower anchor bolt 11 to the steel beam 5, referring to Figures 1, 2, 4 and 5, the first connecting assembly 12 includes a first lower nut 122, a first connecting nut 123, a first upper anchor bolt 125 and a first upper nut 127. The upper end of the first lower anchor bolt 11 passes through the lower flange plate 52 and is fixed to the lower flange plate 52 by the first lower nut 122. The upper end of the first lower anchor bolt 11 is also connected to the lower end of the first upper anchor bolt 125 by the first connecting nut 123. The upper end of the first upper anchor bolt 125 passes through the upper flange plate 51 and is fixed to the upper flange plate 51 by the first upper nut 127.

[0051] The first upper anchor bolt 125 and the first lower anchor bolt 11 are coaxial and arranged vertically opposite each other. The first connecting nut 123 is a cylindrical structure with open ends and threads on the inner wall, and its two ends are threaded to the first lower anchor bolt 11 and the first upper anchor bolt 125, respectively. The number of sets of the first connecting components 12 is the same as the number of the first lower anchor bolts 11, and the specific number depends on the actual needs. For example, in a specific embodiment, referring to Figures 2, 4 and 5, there are four first lower anchor bolts 11. The four first lower anchor bolts 11 are symmetrically arranged with respect to the web 53 of the steel beam 5. Two first lower anchor bolts 11 are provided on each side of the web 53. The two first lower anchor bolts 11 located on the same side of the web 53 are arranged at intervals along the length of the steel beam 5. Correspondingly, there are a total of four sets of first connecting components 12.

[0052] In some embodiments, the first connecting assembly 12 further includes a first lower steel pad 121 and a first upper steel pad 126, used to distribute the pressure exerted by the first lower nut 122 and the first upper nut 127 on the corresponding flange plates, respectively. The first lower steel pad 121 is sleeved on the first lower anchor bolt 11 and sandwiched between the lower flange plate 52 and the first lower nut 122, and the first upper steel pad 126 is sleeved on the first upper anchor bolt 125 and sandwiched between the upper flange plate 51 and the first upper nut 127.

[0053] In some embodiments, the first connecting assembly 12 further includes a first intermediate nut 124, which is sleeved on the lower part of the first upper anchor bolt 125 and can abut against the upper end of the first connecting nut 123.

[0054] The first lower nut 122, the first intermediate nut 124, and the first upper nut 127 each have at least one nut to ensure a stable connection. In a specific example, the first lower nut 122 is a single nut, meaning it has one nut to ensure that the length of the part of the first lower anchor bolt 11 extending beyond the first lower nut 122 can be easily and securely connected to the first connecting nut 123, while also ensuring stable locking of the first lower steel pad 121. After the first lower nut 122 is tightened, it is welded to the first lower steel pad 121. The first intermediate nut 124 is a single nut, so that both the upper and lower ends of the first connecting nut 123 retain a nut (i.e., the first intermediate nut 124 and the first lower nut 122), ensuring a tight lock. The first upper nut 127 is a double nut, including two nuts stacked on top of each other. The top of the first upper anchor bolt 125 protrudes above the upper flange plate 51, and the protruding part is connected to the two nuts to ensure stable locking of the first upper steel pad 126. After the first upper nut 127 is tightened, it is welded to the first upper steel pad 126.

[0055] It is understood that a first lower mounting hole 521 is provided on the lower flange plate 52 of the steel beam 5, and a first upper mounting hole 511 is provided on the upper flange plate 51. The number of the first lower mounting holes 521 and the first upper mounting holes 511 are the same as the number of the first lower anchor bolts 11. A through hole 1211 corresponding to the position of the first lower mounting hole 521 is provided on the first lower steel pad 121, and a through hole 1261 corresponding to the position of the first upper mounting hole 511 is provided on the first upper steel pad 126. The lower part of the first lower anchor bolt 11 is embedded in the concrete foundation (first foundation 1), and the upper end of the first lower anchor bolt 11 can pass through the first lower mounting hole 521 and protrude above the lower flange plate 52 to facilitate the installation of the first lower steel pad 121 and the first lower nut 122. The first upper anchor bolt 125 can be inserted into the first upper mounting hole 511.

[0056] The diameter of the first lower anchor bolt 11 is the same as the diameter of the first upper anchor bolt 125, denoted as d. The size of the through hole 1211 on the first lower steel pad 121 and the through hole 1261 on the first upper steel pad 126 can both be d+2mm, for example. The diameter of the first lower mounting hole 521 and the first upper mounting hole 511 can both be 1.5d, for example. In addition, the cross-sectional dimensions of the steel beam 5 should be wide-flange H-beams (HW). Generally, the flange width of the anchor bolt area (i.e., the flange width of the area corresponding to the first lower anchor bolt 11) should be greater than the anchor bolt spacing (the center-to-center distance between the two first lower anchor bolts 11 symmetrically located on both sides of the web 53) + the opening size (1.5d) + the minimum design distance from the anchor bolt center to the flange edge (2d).

[0057] Furthermore, to facilitate the connection and fixation of the second lower anchor bolt 21 to the steel beam 5 and the second steel column 4, or to the second steel column 4, the specific details are as follows:

[0058] When the second steel column 4 and the steel beam 5 adopt the first connection method described above, referring to Figures 1, 3 and 8, the second column base plate 41 is fixed on the upper flange plate 51. The second connecting assembly 22 includes a second lower nut 222, a second connecting nut 223, a second upper anchor bolt 225 and a second upper nut 227. The upper end of the second lower anchor bolt 21 passes through the lower flange plate 52 and is fixed to the lower flange plate 52 by the second lower nut 222. The upper end of the second lower anchor bolt 21 is also connected to the lower end of the second upper anchor bolt 225 by the second connecting nut 223. The upper end of the second upper anchor bolt 225 passes through the upper flange plate 51 and the second column base plate 41 and is fixed to the second column base plate 41 by the second upper nut 227.

[0059] The second upper anchor bolt 225 and the second lower anchor bolt 21 are coaxial and arranged vertically opposite each other. The second connecting nut 223 is a cylindrical structure with open ends and threads on the inner wall, and its two ends are threaded to the second lower anchor bolt 21 and the second upper anchor bolt 225, respectively. The number of sets of the second connecting components 22 is the same as the number of second lower anchor bolts 21, and the specific number depends on the actual needs. For example, in a specific embodiment, referring to Figures 3 and 8, there are four second lower anchor bolts 21. The four second lower anchor bolts 21 are symmetrically arranged with respect to the web 53 of the steel beam 5. Two second lower anchor bolts 21 are provided on each side of the web 53. The two second lower anchor bolts 21 located on the same side of the web 53 are arranged at intervals along the length of the steel beam 5. Correspondingly, there are a total of four sets of second connecting components 22.

[0060] In some embodiments, the second connecting assembly 22 further includes a second lower steel pad 221 and a second upper steel pad 226, for distributing the pressure exerted by the second lower nut 222 and the second upper nut 227 on the corresponding flange plate or column base plate, respectively. The second lower steel pad 221 is sleeved on the second lower anchor bolt 21 and sandwiched between the lower flange plate 52 and the second lower nut 222, and the second upper steel pad 226 is sleeved on the second upper anchor bolt 225 and sandwiched between the second column base plate 41 and the second upper nut 227.

[0061] In some embodiments, the second connecting assembly 22 further includes a second intermediate nut 224, which is sleeved on the lower part of the second upper anchor bolt 225 and can abut against the upper end of the second connecting nut 223.

[0062] The second lower nut 222, the second intermediate nut 224, and the second upper nut 227 each have at least one nut to ensure a secure connection. In a specific example, the second lower nut 222 and the second intermediate nut 224 are both single nuts, while the second upper nut 227 is a double nut.

[0063] It is understood that a second lower mounting hole is provided on the lower flange plate 52 of the steel beam 5, and a second upper mounting hole is provided on the upper flange plate 51. The number of the second lower mounting holes and the second upper mounting holes are the same as the number of the second lower anchor bolts 21. A mounting hole 411 corresponding to the second upper mounting hole is also provided on the second column base plate 41 (generally, the diameter of the mounting hole 411 is the same as that of the second upper mounting hole, and the two are arranged vertically opposite each other). A through hole corresponding to the position of the second lower mounting hole is provided on the second lower steel pad plate 221, and a through hole 2261 corresponding to the position of the second upper mounting hole 411 is provided on the second upper steel pad plate 226. The specific structure of the second lower anchor bolt 21 and the second connecting component 22 and the connection method with the steel beam 5 are similar to the structure of the first lower anchor bolt 11 and the first connecting component 12 and the connection method with the steel beam 5 described above. The only difference is that the second upper anchor bolt 225 also needs to be connected and fixed to the second column base plate 41 of the second steel column 4, which will not be described in detail here.

[0064] When the second steel column 4 and the steel beam 5 adopt the second connection form described above, referring to Figures 14 and 15, the second end of the steel beam 5 is fixed to the side of the second steel column 4 by the end plate 54. The third connection component 23 includes a third nut 232 and a third steel pad 231. The upper end of the second lower anchor bolt 21 passes through the second column base plate 41 and the third steel pad 231 in sequence and is fixed to the second column base plate 41 by the third nut 232.

[0065] Generally, end plate 54 is vertically welded to the second end of steel beam 5, and end plate 54 is welded and fixed to the side of steel beam 5. The third nut 232 is generally a double nut to ensure locking.

[0066] Furthermore, referring to Figures 1 to 3, as well as Figures 14 and 15, the remedial connection structure also includes a first shear member 6 and a second shear member 7. The top of the first foundation 1 is provided with a first shear groove 13, and the top of the second foundation 2 is provided with a second shear groove 24. The first shear member 6 is fixed to the bottom of the first end of the steel beam 5 and can be accommodated in the first shear groove 13.

[0067] When the second steel column 4 and the steel beam 5 adopt the first connection method described above, the second shear member 7 is fixed at the bottom of the second end of the steel beam 5 and can be accommodated in the second shear groove 24; when the second steel column 4 and the steel beam 5 adopt the second connection method described above, the second shear member 7 is fixed at the bottom of the second column base plate 41 and can be accommodated in the second shear groove 24.

[0068] For example, the first shear member 6 and the second shear member 7 can both be made of H-beams, with dimensions such as: cross section: HW100mm×100mm×6mm×8mm, dimensions: 100mm×100mm×150mm; one end of the H-beam is welded to the lower flange plate 52 of the steel beam 5 or the second column base plate 41. Taking the first shear member 6 as an example, the centerline of the first shear member 6 (i.e., the straight line passing through the midpoint of the width direction of the web 53 of the shear member and perpendicular to the web 53) is consistent with the axis of the web 53 of the steel beam 5 (i.e., the straight line in the length extension direction of the web 53 of the steel beam 5). That is, the surface of the web 53 of the first shear member 6 is perpendicular to the surface of the web 53 of the steel beam 5, and the web 53 of the first shear member 6 is located at the middle of the width direction of the lower flange plate 52 of the steel beam 5. It is then welded, with a weld size of 6mm. At the same time, holes are made in the upper and lower flanges of the steel beam 5 near the shear member, and the size of the holes is consistent with the through holes on the column base plate of the steel column (1.5d). The installation of the second shear member 7 is similar to that of the first shear member 6, and will not be described again.

[0069] Furthermore, to improve structural stability, a first stiffening rib 531 is provided on the web 53 at the position corresponding to the first shear member 6, and an intermediate stiffening rib 532 is provided on the web 53 at the position corresponding to the first steel column 3. When the second steel column 4 and the steel beam 5 adopt the first connection method described above, that is, when the second column base plate 41 is fixed on the upper flange plate 51, a second stiffening rib 533 is provided on the web 53 at the position corresponding to the second shear member 7.

[0070] Two first stiffening ribs 531, two intermediate stiffening ribs 532, and two second stiffening ribs 533 are symmetrically provided on both sides of the web 53. The first stiffening ribs 531, intermediate stiffening ribs 532, and second stiffening ribs 533 are all rectangular plates and are fixedly connected (e.g., welded) to the web 53, upper flange plate 51, and lower flange plate 52 of the steel beam 5. The weld size is 6mm to ensure the in-plane stability of the force transmission component of the steel beam 5. During installation, the plate of the first stiffening rib 531 is arranged vertically opposite to the web 53 of the first shear member 6. When the second steel column 4 and the steel beam 5 adopt the first connection method, the plate surface of the second stiffening rib 533 is arranged vertically opposite to the web 53 of the second shear member 7.

[0071] Furthermore, both the first steel column 3 and the second steel column 4 are made of H-beams. During installation, depending on the installation direction, the two steel columns can be installed in two ways: First installation method: the web plates 53 of the first steel column 3 and the web plates 53 of the second steel column 4 are perpendicular to the web plate 53 of the steel beam 5, and the second column base plate 41 is fixed to the upper flange plate 51. In this installation method, the second steel column 4 uses the first connection method described above. Second installation method: the web plates 53 of the first steel column 3 and the web plates 53 of the second steel column 4 are parallel to the web plate 53 of the steel beam 5 and are directly opposite the web plate 53 of the steel beam 5. The second end of the steel beam 5 is fixed to one of the flange plates of the second steel column 4. In this installation method, the second steel column 4 uses the second connection method.

[0072] To improve structural stability, web stiffening ribs 81 are provided on both sides of the bottom of the web plate 53 of the first steel column 3 and the second steel column 4; and / or, flange stiffening ribs 82 are provided on the outer sides of the bottom of the two flange plates of the first steel column 3 and the second steel column 4.

[0073] Generally, the web stiffener 81 adopts a plate similar to a right trapezoid. For example, as shown in Figure 1, the web stiffener 81 includes a right trapezoidal plate and a rectangular plate connected vertically, with the lower base of the right trapezoid connected to the rectangular plate. The flange stiffener 82 can be, for example, a right-angled triangular plate, with its two right-angled sides connected to the outer surface of the corresponding flange plate of the steel column and the upper surface of the corresponding column base plate, respectively. When the two steel columns adopt the first installation method described above, the plate of the intermediate stiffener 532 is generally arranged vertically opposite to the web plate 53 of the first steel column 3, and the plate of the second stiffener 533 is arranged vertically opposite to the web plate 53 of the second steel column 4. When the two steel columns adopt the second installation method described above, the plate of the intermediate stiffener 532 is generally arranged vertically opposite to the web stiffener 81 of the first steel column 3.

[0074] To ensure structural stability, both the first steel column 3 and the second steel column 4 are typically equipped with web stiffening ribs 81. Flange stiffening ribs 82 may or may not be provided. It is understood that when the second steel column 4 is equipped with flange stiffening ribs 82, in the second installation method described above, the flange stiffening rib 82 on one flange plate of the finished steel bracket will be removed to facilitate welding and fixing of the second steel column 4 to the end plate 54 at the second end of the steel beam 5.

[0075] Furthermore, to better understand the above-mentioned remedial connection structure, the following detailed explanation will be based on the structure shown in Figure 1, where the two steel columns adopt the first installation method and the second steel column 4 adopts the first connection method, as follows:

[0076] The entire remedial connection structure is mainly used when the position of the column base anchor bolts does not match the originally set node position after the concrete short column is poured. Specifically, during construction, both the first foundation 1 and the second foundation 2 adopt on-site cast concrete structures. After the concrete short column is poured, the lower parts of the first lower anchor bolt 11 and the second lower anchor bolt 21 are embedded in the concrete foundation, while the upper parts are exposed. The center-to-center distance between the two foundations (i.e., the horizontal distance between the vertical center lines of the two foundations, i.e., the center-to-center distance between the first shear groove 13 and the second shear groove 24, i.e., the horizontal distance between the vertical center line of the first shear groove 13 and the vertical center line of the second shear groove 24) corresponds to the distance L2 in Figure 1. The main structures of both the first and second steel column bases include steel columns, column base plates, and shear-resistant components. These main structures are fabricated in a factory. After fabrication, the steel columns, column base plates, and shear-resistant components of each steel column base are welded together to form a finished steel support frame. The center-to-center distance between the two finished steel supports (i.e., the center-to-center distance between the two column base plates) after factory prefabrication corresponds to the distance L1 in Figure 1. The specific fabrication of the first foundation 1, the second foundation 2, and the finished steel supports are all existing technologies and will not be elaborated upon here.

[0077] When there is a significant error between the prefabricated steel supports and the column bases, and this error exceeds the size of the column base plate—that is, when the spacing L2 is greater than L1, and the difference between the two corresponds to a spacing L3 greater than the size of the column base plate (specifically, the length of the column base plate along the line connecting the centers of the two foundations)—the two prefabricated steel supports and the two anchor bolt foundations cannot be installed. For example, in a specific case, the center-to-center distance L3 between the two column bases is 3m, and the spacing L1 between the two prefabricated steel supports is 2m. Due to a 1m error between the prefabricated steel supports and the column bases, installation is impossible.

[0078] When faced with the above-mentioned installation failure situation, the on-site remedial methods for steel column base joints include the following steps:

[0079] S1: The length and cross-sectional dimensions of the steel beam 5 are determined by the center-to-center distance L2 between the first foundation 1 and the second foundation 2.

[0080] S2: Remove the shear-resistant components from both prefabricated steel supports in the factory. The height of the removed steel column should be consistent with the height of steel beam 5. Re-weld the removed shear-resistant components to the corresponding positions of steel beam 5 and foundation, and make holes in the upper and lower flanges of steel beam 5.

[0081] S3: Weld the column base plate at the bottom of the cut finished steel bracket to the corresponding position of the upper flange of the steel beam 5 (one of the cut finished steel brackets is welded to the upper flange between the two ends of the steel beam 5, and the other cut finished steel bracket is welded to the upper flange at the second end of the steel beam 5). Add stiffening ribs (i.e. the first stiffening rib 531, the intermediate stiffening rib 532 and the second stiffening rib 533 mentioned above) to the steel beam 5 at the bottom position of the corresponding steel column and at the position of the first shear member 6 to ensure the stability of the cross section of the steel beam 5.

[0082] S4: Based on the existing first lower anchor bolt 11 and second lower anchor bolt 21 on the two foundations, add a first upper anchor bolt 125 and a second upper anchor bolt 225. The lower anchor bolt passes through the lower flange plate 52 of the steel beam 5, and the upper anchor bolt passes through the upper flange plate 51 of the steel beam 5. A connecting nut is set between the upper and lower anchor bolts to connect the lower end of the upper anchor bolt to the upper end of the lower anchor bolt through the connecting nut. The upper end of the upper anchor bolt is higher than the upper flange plate 51, so that it forms a boot-like foundation.

[0083] S5: Add a first upper steel pad 126 above the first end of the upper flange plate 51 of the steel beam 5 and install a first upper nut 127. Add a second upper steel pad 226 above the second column base plate 41 and install a second upper nut 227.

[0084] More specifically, in steps S2 and S3 above, since steel beam 5 is added in this embodiment compared to the direct connection between the prefabricated steel support and the foundation, in order to ensure that the height between the top of the steel column and the top surface of the foundation is still equal to the height between the top of the steel column and the top surface of the foundation when the prefabricated steel support is directly installed on the foundation, the two prefabricated steel columns need to be cut during the remedial construction.

[0085] Two prefabricated steel supports are designated as the first and second prefabricated steel supports, respectively. Taking the cutting process of the first prefabricated steel support as an example, the first prefabricated steel support includes a first steel column 3, a first column base plate 31, and a first shear member 6 welded together. First, the first shear member 6 is cut off, as shown in Figure 9. Then, the first steel column 3 is cut at the first cutting line X, with the height between the first cutting line X and the lower surface of the first column base plate 31 being H+h. The remaining first steel column 3 after cutting is shown in Figure 10. Next, the first steel column 3 is cut at the second cutting line Y, with the height between the second cutting line Y and the first cutting line X being H. The remaining first steel column 3 after cutting is shown in Figure 11. Then, the structural part cut off below the first cutting line X in Figure 9 is re-welded to the bottom end of the remaining first steel column 3 in Figure 11, as shown in Figure 12. This forms a new steel support (i.e., the prefabricated steel support after cutting). Next, the first column base plate 31 of the new steel support in Figure 12 is welded and fixed to the upper flange plate 51 of the steel beam 5, as shown in Figure 13 after welding. The first shear member 6, which was cut off, is then welded to the lower surface of the lower flange plate 52 of the steel beam 5. The cutting process of the second finished steel support is the same as that of the first finished steel support, and will not be described again here.

[0086] After steps S2 and S3 are completed, the steel beam 5 is welded to the first steel column 3 and the second steel column 4 to form a whole. The assembled whole support is hoisted to ensure that the shear-resistant component can be smoothly placed into the shear-resistant groove, and at the same time, to ensure that the anchor bolt can pass smoothly through the opening on the lower flange plate 52 of the steel beam 5. Then, step S4 is performed to connect and fix the anchor bolt.

[0087] Furthermore, when the two steel columns adopt the above-mentioned second installation method and the second steel column 4 adopts the above-mentioned second connection method as shown in Figure 14, during construction, only the prefabricated first finished steel bracket needs to be cut (the cutting method is the same as when the two steel columns adopt the above-mentioned first installation method); if the second finished steel bracket does not have flange stiffening ribs 82, then the prefabricated second finished steel bracket does not need to be cut; if the second finished steel bracket has flange stiffening ribs 82, then the prefabricated second finished steel bracket needs to have the flange stiffening ribs 82 on one side of the flange plate removed.

[0088] In summary, the remedial connection structure of this embodiment has the following advantages:

[0089] (1) In cases where there is a large error between the finished steel support and the column base (the error size is larger than the size of the steel column base plate), this embodiment adds a steel beam force transmission component (H-beam) to form a boot-like foundation, which realizes the connection between the superstructure and the foundation. The column base needs to use the steel beam 5 as a force transmission component to transfer the upper load of the steel support to the foundation, thus solving the problem of the anchor bolts not being able to be installed due to the misalignment between the foundation and the steel column base plate.

[0090] (2) The simple structural conversion avoids the need for reconstruction due to positioning deviation. The conversion structure is simple, the stress is clear, the construction is convenient, and the cost is low. Only structural conversion is required to avoid reconstruction due to positioning deviation. There is no need to redo the foundation pouring and steel support prefabrication. The on-site construction process is simple and the modification cost is low.

[0091] The above are merely illustrative embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A remedial connection structure for misalignment between anchor bolt foundation and steel column base, characterized in that, The system includes a first foundation, a second foundation, a first steel column, a second steel column, and a steel beam. A first lower anchor bolt is installed on the first foundation, and a second lower anchor bolt is installed on the second foundation. A first column base plate is connected to the bottom of the first steel column, and a second column base plate is connected to the bottom of the second steel column. The center-to-center distance between the first and second foundations is greater than the center-to-center distance between the first and second column base plates. The two ends of the steel beam can overlap the top surfaces of the first and second foundations. The first lower anchor bolt is connected to the first end of the steel beam via a first connecting assembly. The first column base plate is fixed to the top surface of the steel beam and located between the two ends of the steel beam. The second column base plate is fixed to the top surface of the second end of the steel beam, and the second lower anchor bolt is connected to the second end of the steel beam and the second column base plate via a second connecting assembly. Alternatively, the second end of the steel beam is fixed to the side of the second steel column, the second column base plate is placed on the top surface of the second foundation, and the second lower anchor bolt is connected to the second column base plate via a third connecting assembly.

2. The remedial connection structure as described in claim 1, characterized in that, The steel beam is an H-beam and includes an upper flange plate, a lower flange plate, and a web plate. The web plate is vertically arranged, the lower flange plate abuts against the top surface of the first foundation and the second foundation, and the first column base plate is fixed to the upper flange plate.

3. The remedial connection structure as described in claim 2, characterized in that, The first connecting assembly includes a first lower nut, a first connecting nut, a first upper anchor bolt, and a first upper nut. The upper end of the first lower anchor bolt passes through the lower flange plate and is fixed to the lower flange plate by the first lower nut. The upper end of the first lower anchor bolt is also connected to the lower end of the first upper anchor bolt by the first connecting nut. The upper end of the first upper anchor bolt passes through the upper flange plate and is fixed to the upper flange plate by the first upper nut.

4. The remedial connection structure as described in claim 3, characterized in that, The first connecting assembly further includes a first lower steel pad and a first upper steel pad. The first lower steel pad is sleeved on the first lower anchor bolt and sandwiched between the lower flange plate and the first lower nut. The first upper steel pad is sleeved on the first upper anchor bolt and sandwiched between the upper flange plate and the first upper nut.

5. The remedial connection structure as described in claim 3, characterized in that, The first connecting assembly further includes a first intermediate nut, which is sleeved on the lower part of the first upper anchor bolt and can abut against the upper end of the first connecting nut; the first lower nut and the first intermediate nut are both single nuts, and the first upper nut is a double nut.

6. The remedial connection structure as described in claim 2, characterized in that, The second column base plate is fixed to the upper flange plate. The second connecting assembly includes a second lower nut, a second connecting nut, a second upper anchor bolt, and a second upper nut. The upper end of the second lower anchor bolt passes through the lower flange plate and is fixed to the lower flange plate by the second lower nut. The upper end of the second lower anchor bolt is also connected to the lower end of the second upper anchor bolt by the second connecting nut. The upper end of the second upper anchor bolt passes through the upper flange plate and the second column base plate and is fixed to the second column base plate by the second upper nut.

7. The remedial connection structure as described in claim 6, characterized in that, The second connecting assembly further includes a second lower steel pad and a second upper steel pad. The second lower steel pad is fitted onto the second lower anchor bolt and sandwiched between the lower flange plate and the second lower nut. The second upper steel pad is fitted onto the second upper anchor bolt and sandwiched between the second column base plate and the second upper nut.

8. The remedial connection structure as described in claim 6, characterized in that, The second connecting assembly further includes a second intermediate nut, which is sleeved on the lower part of the second upper anchor bolt and can abut against the upper end of the second connecting nut; the second lower nut and the second intermediate nut are both single nuts, and the second upper nut is a double nut.

9. The remedial connection structure as described in claim 2, characterized in that, The second end of the steel beam is fixed to the side of the second steel column by an end plate. The third connecting assembly includes a third nut and a third steel pad. The upper end of the second lower anchor bolt passes through the second column base plate and the third steel pad in sequence and is fixed to the second column base plate by the third nut.

10. The remedial connection structure as described in claim 2, characterized in that, The remedial connection structure further includes a first shear-resistant member and a second shear-resistant member. The top of the first foundation is provided with a first shear-resistant groove, and the top of the second foundation is provided with a second shear-resistant groove. The first shear-resistant member is fixed to the bottom of the first end of the steel beam and can be accommodated in the first shear-resistant groove. The second shear-resistant member is fixed to the bottom of the second end of the steel beam and can be accommodated in the second shear-resistant groove. Alternatively, the second shear-resistant member is fixed to the bottom of the second column base plate and can be accommodated in the second shear-resistant groove.

11. The remedial connection structure as described in claim 10, characterized in that, A first stiffening rib is provided on the web plate at the position corresponding to the first shear member, and an intermediate stiffening rib is provided on the web plate at the position corresponding to the first steel column; when the second column base plate is fixed on the upper flange plate, a second stiffening rib is provided on the web plate at the position corresponding to the second shear member.

12. The remedial connection structure as described in claim 2, characterized in that, Both the first and second steel columns are H-beams; the webs of both the first and second steel columns are perpendicular to the web of the steel beam, and the base plate of the second column is fixed to the upper flange plate; or, the webs of both the first and second steel columns are parallel to the web of the steel beam and are arranged directly opposite the web of the steel beam, and the second end of the steel beam is fixed to one of the flange plates of the second steel column.

13. The remedial connection structure as described in claim 12, characterized in that, Web stiffening ribs are provided on both sides of the bottom of the web of the first steel column and the second steel column; and / or, flange stiffening ribs are provided on the outer sides of the bottom of the two flange plates of the first steel column and the second steel column.

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