Gate-type supporting jig frame and large-span steel structure construction method

Abstract

The invention provides a gate-type supporting jig frame and a large-span steel structure construction method, and belongs to the technical field of steel structure construction. The gate-type supporting jig frame comprises a gate-type supporting mechanism and a cutting board; the gate-type supporting mechanism comprises a first stand column and a second stand column which are arranged in parallel, and a web member arranged between the first stand column and the second stand column. A first notch and a second notch are oppositely formed in the top of the first stand column and the top of the second stand column. The two ends of the lower portion of the cutting board are inserted into the first notch and the second notch respectively, and a round pipe penetrating opening is formed in the top of the cutting board. The problems that in the prior art, due to the fact that a traditional sectional type high-altitude splicing method of a large-span space structure is adopted, under the condition that the installation space is limited, the number of supporting points of round pipes of the large-span steel structure is small, precision adjustment is difficult, the installation precision is low, the high-altitude splicing difficulty is large, efficiency is low, and potential safety hazards exist can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure construction, and more particularly to a portal support frame and a large-span steel structure construction method. Background Art

[0002] With the rapid development of steel structures, unusually shaped, large-span, and long-cantilevered structures are common in steel structures such as airports, train stations, theaters, stadiums, exhibition halls, and shopping malls. The roofs of these projects, in particular, often utilize large-span spatial structures, characterized by their long spans, few support points, and large volume. However, due to their large spans and heavy weight, these structures present significant installation challenges and are difficult to control with high precision.

[0003] The traditional segmented high-altitude assembly method currently used for large-span spatial structures has limited installation space. The circular tubes of large-span steel structures have few fulcrums and are difficult to adjust accurately. As a result, it leads to low installation accuracy, great difficulty in high-altitude assembly, low efficiency, and safety hazards. Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a portal support frame and a large-span steel structure construction method to solve the problems of the traditional segmented high-altitude assembly method of large-span spatial structures used in the prior art. When the installation space is limited, the circular tubes of the large-span steel structure have few fulcrums and are difficult to adjust with precision, resulting in low installation accuracy, great difficulty in high-altitude assembly, low efficiency, and safety hazards.

[0005] The portal support frame provided by the present invention is used to assist in the construction of large-span steel structures; it includes a portal support mechanism and a blade; wherein,

[0006] The door-type support mechanism includes two parallel first and second columns, and a web member disposed between the first and second columns; a first notch and a second notch are formed opposite to each other at the tops of the first and second columns;

[0007] The two ends of the lower portion of the blade are respectively inserted into the first notch and the second notch, and a circular tube intersection is provided on the top of the blade.

[0008] In addition, a preferred solution is that first long holes are correspondingly provided on two opposite side walls of the first slot; second long holes are correspondingly provided on two opposite side walls of the second slot; first fixing holes and second fixing holes are respectively provided at both ends of the lower part of the knife plate corresponding to the first long hole and the second long hole; a first detachable fixing part is provided between the first long hole and the first fixing hole; and a second detachable fixing part is provided between the second long hole and the second fixing hole.

[0009] In addition, a preferred solution is that the first detachable fixing member is a bolt; and / or the second detachable fixing member is a bolt.

[0010] In addition, a preferred solution is that an operating platform is provided on the outer side of the upper portion of the door-type support mechanism; two ends of the operating platform are respectively fixed on the first column and the second column.

[0011] In addition, a preferred solution is to provide a guardrail around the top of the operating platform.

[0012] In addition, a preferred solution is that the first column and the second column are both made of steel columns; the operating platform is a steel operating platform; and the operating platform is welded to the portal support mechanism.

[0013] In addition, a preferred solution is that the web member is a steel web member; both ends of the web member are welded to the first column and the second column respectively.

[0014] In addition, a preferred solution is that stress gauges are respectively provided on the first column, the second column and the web.

[0015] In addition, a preferred solution is that when the portal support frame is in use, the bottom end of the portal support mechanism is welded and fixed to the steel beam of the lower frame structure of the long-span steel structure.

[0016] The large-span steel structure construction method provided by the present invention uses the portal support cradle as described above to position and support the circular tubes in the large-span steel structure to assist in completing the construction of the large-span steel structure, and includes the following steps:

[0017] Step S1, determining the installation position of the round tube in the long-span steel structure, and using both ends of the lower part of the round tube as the support points of the tire frame;

[0018] Step S2: Install the portal support tire frame at each tire frame support point, and fix the bottom of the portal support tire frame to the steel beam of the lower frame structure of the long-span steel structure to complete the installation of the portal support tire frame;

[0019] Step S3, placing the round tube horizontally on the installed portal support frame, so that the frame support point of the round tube is located within the round tube intersection of the blade;

[0020] Step S4: adjusting the position of the blade in the first notch and the second notch to adjust the installation accuracy of the round tube so that the installation of the round tube meets the preset requirements;

[0021] Step S5: fixing the round tubes that meet the preset requirements on the upper frame of the long-span steel structure to complete the installation of the round tubes on the long-span steel structure;

[0022] Step S6: According to the design drawings, the connecting parts are assembled between the round tubes that have been installed on the long-span steel structure, and the portal support frame is removed from the steel beams of the lower frame structure to complete the construction of the long-span steel structure.

[0023] It can be seen from the above technical solutions that the portal support frame and the large-span steel structure construction method provided by the present invention can position and support the circular tubes in the large-span steel structure during the construction of the large-span steel structure through the design of the portal support mechanism and the structure of the knife plate; by adjusting the positions of the two ends of the lower part of the knife plate in the first notch at the top of the first column and the second notch at the top of the second column, the installation accuracy of the circular tube can be flexibly adjusted, and the two ends of the circular tube can be positioned and supported when the installation space is limited, thereby increasing the installation accuracy of the circular tube and improving the construction accuracy of the overall large-span steel structure; and simplifying the difficulty of high-altitude assembly of circular tubes, improving construction efficiency, and improving construction safety.

[0024] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By referring to the following description in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and easily understood.

[0026] Figure 1 Schematic diagram of the structure of a portal support tire frame according to an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the upper structure of the portal support tire frame according to an embodiment of the present invention;

[0028] Figure 3Schematic diagram of a positioning support structure of a round tube by a portal support frame according to an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the planar layout of a long-span steel structure and a frame structure according to an embodiment of the present invention;

[0030] Figure 5 Flowchart of a large-span steel structure construction method according to an embodiment of the present invention.

[0031] In the accompanying drawings, 11-first column, 111-first long hole, 12-second column, 121-second long hole, 13-web, 2-knife plate, 21-intersection of circular tubes, 31-first detachable fixing part, 32-second detachable fixing part, 4-operating platform, 5-large-span steel structure, 51-lower frame structure, 511-steel beam, 52-circular tube.

[0032] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0033] In response to the above-mentioned problem, in the prior art, the traditional segmented high-altitude assembly method of large-span spatial structures is adopted. When the installation space is limited, the circular tubes of the large-span steel structure have few fulcrums and are difficult to adjust with precision. Therefore, it leads to problems such as low installation accuracy, great difficulty in high-altitude assembly, low efficiency, and safety hazards. A portal support frame and a large-span steel structure construction method are proposed.

[0034] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] In order to illustrate the portal support frame and the large-span steel structure construction method provided by the present invention, Figure 1 The structure of the portal support tire frame according to an embodiment of the present invention is shown; Figure 2 The upper structure of the portal support tire frame according to an embodiment of the present invention is shown; Figure 3 It shows a positioning support structure of a round tube by a portal support frame according to an embodiment of the present invention; Figure 4 The planar arrangement of the long-span steel structure and the frame structure according to an embodiment of the present invention is shown; Figure 5 The flowchart of the large-span steel structure construction method according to an embodiment of the present invention is shown.

[0036] like Figures 1 to 4 As shown together, the portal support frame provided by the present invention is used to assist in the construction of large-span steel structures; it includes a portal support mechanism and a blade 2; wherein,

[0037] The door-type support mechanism includes two parallel first columns 11 and second columns 12, and a web member 13 disposed between the first column 11 and the second column 12; a first notch and a second notch are formed on the tops of the first column 11 and the second column 12 opposite to each other;

[0038] The two ends of the lower portion of the blade plate 2 are respectively inserted into the first notch and the second notch, and a circular tube intersecting opening 21 is provided on the top of the blade plate 2 .

[0039] Specifically, during the construction process of the large-span steel structure 5, the basic framework of the large-span steel structure 5 is pre-built according to the drawings, and its basic framework includes a lower frame structure 511, an upper frame (not shown in the figure), and a connecting frame (not shown in the figure) fixed between the lower frame structure 511 and the upper frame. The construction process of the large-span steel structure 5 is to install the circular tubes 52 to the designated positions of the upper frame, and then assemble them through connectors according to the connection relationship between the circular tubes 52 according to the drawings. The traditional segmented high-altitude assembly method currently used is limited in installation space. Therefore, during the installation process of the circular tubes 52, there are few and fixed fulcrums, making it difficult to adjust the installation accuracy. Therefore, it leads to problems such as low installation accuracy, great difficulty in high-altitude assembly, and low efficiency. Due to the low installation accuracy, safety accidents are prone to occur, so there are still certain safety hazards.

[0040] Based on the above-mentioned problems existing in the prior art, the present invention provides a portal support frame that can flexibly adjust the support points when the installation space is limited, so as to assist in the positioning and installation of the circular tube 52 in the large-span steel structure 5, so as to ensure the installation accuracy and safety of the large-span steel structure 5.

[0041] Through the design of the structure of the portal support mechanism and the blade 2, the circular tube 52 in the large-span steel structure 5 can be positioned and supported during the construction of the large-span steel structure 5; by adjusting the positions of the two ends of the lower part of the blade 2 in the first notch at the top of the first column 11 and the second notch at the top of the second column 12, the installation accuracy of the circular tube 52 can be flexibly adjusted, and the two ends of the circular tube 52 can be positioned and supported when the installation space is limited, thereby increasing the installation accuracy of the circular tube 52 and improving the construction accuracy of the overall large-span steel structure 5; and simplifying the difficulty of high-altitude assembly of the circular tube 52, improving construction efficiency, and improving construction safety.

[0042] As a preferred solution of the present invention, a first long hole 111 is correspondingly provided on two opposite side walls of the first slot; a second long hole 121 is correspondingly provided on two opposite side walls of the second slot; a first fixing hole and a second fixing hole are provided at both ends of the lower part of the knife plate 2 corresponding to the first long hole 111 and the second long hole 121 respectively; a first detachable fixing part 31 is provided between the first long hole 111 and the first fixing hole; and a second detachable fixing part 32 is provided between the second long hole 121 and the second fixing hole.

[0043] Specifically, the above structural design facilitates flexible adjustment of the position of the blade 2 according to the position requirements for the installation of the circular tube 52 .

[0044] As a preferred solution of the present invention, the first detachable fixing member 31 is a bolt; and / or the second detachable fixing member 32 is a bolt.

[0045] It should be noted that the first detachable fixing member 31 and the second detachable fixing member 32 are preferably, but not limited to, bolts. Other detachable members may also be used for replacement, and the present invention does not make any special limitation on this.

[0046] As a preferred solution of the present invention, an operating platform 4 is provided on the outer side of the upper portion of the door-type support mechanism; both ends of the operating platform 4 are fixed to the first column 11 and the second column 12 respectively.

[0047] Specifically, the operation platform 4 facilitates personnel to adjust the position of the circular tube 52 .

[0048] As a preferred solution of the present invention, a guardrail is provided on the top periphery of the operating platform 4 .

[0049] Specifically, the guardrails provided on the top and sides of the operating platform 4 increase the safety of construction and prevent construction workers from falling.

[0050] As a preferred solution of the present invention, the first column 11 and the second column 12 are both made of steel; the operating platform 4 is made of steel; and the operating platform 4 is welded to the portal support mechanism.

[0051] Specifically, the operating platform 4 and the portal support mechanism are preferably connected by, but not limited to, full penetration welds, thereby increasing the firmness of the connection between the two and the stability of the overall structure.

[0052] As a preferred solution of the present invention, the web member 13 is a steel web member; both ends of the web member 13 are welded to the first column 11 and the second column 12 respectively.

[0053] Specifically, the web 13 is used to fix the first column 11 and the second column 12 , and its two ends are preferably fixed to the first column 11 and the second column 12 by full penetration welds, thereby increasing the overall firmness and stability of the portal support mechanism.

[0054] As a preferred solution of the present invention, stress gauges are respectively provided on the first column 11 , the second column 12 and the web member 13 .

[0055] Specifically, by arranging stress gauges on the first column 11 , the second column 12 and the web 13 , the stress of the circular tube 52 during installation can be detected, so that installation adjustments can be made in a timely manner.

[0056] As a preferred solution of the present invention, when the portal support frame is in use, the bottom end of the portal support mechanism is welded and fixed to the steel beam 511 of the lower frame structure 51 of the long-span steel structure 5 .

[0057] Specifically, the bottom end of the portal support mechanism is preferably fixed to the steel beam 511 by a full penetration weld, so that the support for the circular tube 52 is more stable.

[0058] like Figure 5 As shown, the large-span steel structure construction method provided by the present invention adopts the portal support cradle of the present invention as described above to position and support the round tube 52 in the large-span steel structure 5 to assist in completing the construction of the large-span steel structure 5, and includes the following steps:

[0059] Step S1: Determine the installation position of the round tube 52 in the long-span steel structure 5, and use both ends of the lower part of the round tube 52 as support points of the tire frame;

[0060] Step S2: Install a portal support cradle at each cradle support point, and fix the bottom of the portal support cradle to the steel beam 511 of the lower frame structure 51 of the long-span steel structure 5 to complete the installation of the portal support cradle;

[0061] Step S3, placing the round tube 52 horizontally onto the installed portal support frame, so that the frame support point of the round tube 52 is located within the round tube intersection 21 of the blade 2;

[0062] Step S4: Adjust the installation accuracy of the round tube 52 by adjusting the position of the blade 2 in the first notch and the second notch, so that the installation of the round tube 52 meets the preset requirements;

[0063] Step S5: Fix the round tube 52 that meets the preset requirements on the upper frame of the long-span steel structure 5 to complete the installation of the round tube 52 on the long-span steel structure 5;

[0064] Step S6: According to the design drawings, the connecting parts are assembled between the circular tubes 52 that have been installed on the long-span steel structure 5, and the portal support frame is removed from the steel beam 511 of the lower frame structure 51 to complete the construction of the long-span steel structure 5.

[0065] Specifically, a force calculation can be performed based on the load conditions of the portal support frame required at each support point to determine the cross-sectional specifications and material of the first column 11, second column 12, web 13, and blade 2. The first column 11, second column 12, web 13, and blade 2 are preferably, but not limited to, steel. Other materials are also acceptable and are not particularly limiting in this regard. After the lengths of the first and second columns 11, 12 are determined based on the required support height of the circular tube 52, they are welded to the web 13 on the ground to form a portal support structure. First and second notches are then formed at the tops of the first and second columns 11, 12, respectively, and the blade 2 is inserted into these notches. A circular tube intersection 21 is pre-formed at the top of the blade 2 to match the circular tube 52. Once the blade 2 is installed, the integrated force-bearing structure, i.e., the portal support frame, is formed.

[0066] After the steel beams 511 of the lower frame structure 51 of the long-span steel structure 5 have been properly installed, a portal support cradle is installed. The bottoms of the first and second columns 11, 12 of the portal support cradle are preferably fully welded to the steel beams 511. At this point, the portal support cradle can support the round tubes 52. The round tubes 52 of the long-span steel structure 5 are placed horizontally on the installed portal support cradle, so that the cradle support point of the round tubes 52 is located within the round tube intersection 21 of the blade 2.

[0067] After completing the installation of the circular tube 52, according to the design requirements, the size of the first notch and the second notch at the top of the first column 11 and the second column 12 can be adjusted by flame cutting, or the position of the blade 2 in the notch can be adjusted by the first detachable fixing member 31 and the second detachable fixing member 32 to adjust the installation accuracy of the circular tube 52. After completing the accuracy adjustment of the circular tube 52 so that its installation accuracy meets the design requirements, repeat the above steps until the installation of all the circular tubes 52 on the large-span steel structure 5 is completed.

[0068] After all welds of the circular tube 52 of the large-span steel structure 5 are qualified, a stress gauge can be installed on the circular tube 52 and a reflector can be installed at the mid-span position of the circular tube 52 to combine with the stress gauges installed on the first column 11, the second column 12 and the web 13 to detect whether the circular tube 52 is deformed.

[0069] Finally, according to the design drawings, connectors are assembled between the circular tubes 52 already installed on the long-span steel structure 5, and the portal support cradle is removed from the steel beam 511 of the lower frame structure 51. When removing the portal support cradle, a flame cutter can be used to adjust the notches at the tops of the first and second columns 11, 12, so that the blade 2 can be lowered, and then the welds between the first and second columns 11, 12, and the steel beam 511 can be cut. During the removal of the portal support cradle, stress changes can be monitored using strain gauges installed on the first and second columns 11, 12, and web members 13. It is important to ensure that stress and deformation remain below pre-calculated values. After the portal support cradle is removed, a 3D scanner can be used to inspect the shape of the circular tubes 52 of the long-span steel structure 5.

[0070] It can be seen from the above specific embodiments that the portal support frame and large-span steel structure construction method provided by the present invention can, through the design of the portal support mechanism and the structure of the knife plate, position and support the circular tubes in the large-span steel structure during the construction of the large-span steel structure; by adjusting the positions of the two ends of the lower part of the knife plate in the first notch at the top of the first column and the second notch at the top of the second column, the installation accuracy of the circular tube can be flexibly adjusted, and the two ends of the circular tube can be positioned and supported when the installation space is limited, thereby increasing the installation accuracy of the circular tube and improving the construction accuracy of the overall large-span steel structure; and simplifying the difficulty of high-altitude assembly of circular tubes, improving construction efficiency, and improving construction safety.

[0071] The portal support cradle and long-span steel structure construction method proposed in accordance with the present invention have been described above by way of example with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications may be made to the portal support cradle and long-span steel structure construction method proposed in accordance with the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A portal support frame for assisting the construction of large-span steel structures; characterized in that: It includes a door-type support mechanism and a knife plate; wherein, The door-type support mechanism includes two parallel first and second columns, and a web member disposed between the first and second columns; a first notch and a second notch are formed opposite to each other at the tops of the first and second columns; The two ends of the lower portion of the blade are respectively inserted into the first notch and the second notch, and a circular tube intersection is provided on the top of the blade.

2. The portal support tire frame according to claim 1, characterized in that: First long holes are correspondingly provided on two opposite side walls of the first notch; Second long holes are correspondingly provided on two opposite side walls of the second notch; A first fixing hole and a second fixing hole are provided at both ends of the lower portion of the blade, corresponding to the first long hole and the second long hole respectively; A first detachable fixing member is provided between the first long hole and the first fixing hole; A second detachable fixing piece is provided between the second long hole and the second fixing hole.

3. The portal support tire frame according to claim 2, characterized in that: The first detachable fixing member is a bolt; and / or, The second detachable fixing member is a bolt.

4. The portal support tire frame according to claim 1, characterized in that: An operating platform is provided on the outer side of the upper portion of the door-type support mechanism; Two ends of the operating platform are respectively fixed on the first column and the second column.

5. The portal support tire frame according to claim 4, characterized in that: A guardrail is provided on the top periphery of the operating platform.

6. The portal support tire frame according to claim 4, characterized in that: The first column and the second column are both made of steel; The operating platform is a steel operating platform; The operating platform is welded to the door-type supporting mechanism.

7. The portal support tire frame according to claim 6, characterized in that: The web is a steel web; Two ends of the web are welded to the first column and the second column respectively.

8. The portal support tire frame according to claim 1, characterized in that: A stress gauge is provided on each of the first column, the second column and the web.

9. The portal support tire frame according to claim 1, characterized in that: When the portal support frame is in use, the bottom end of the portal support mechanism is welded and fixed to the steel beam of the lower frame structure of the long-span steel structure.

10. A method for constructing a large-span steel structure, characterized in that: Using the portal support cradle as described in any one of claims 1 to 9 to position and support the round tubes in the long-span steel structure to assist in completing the construction of the long-span steel structure includes the following steps: Step S1, determining the installation position of the round tube in the long-span steel structure, and using both ends of the lower part of the round tube as the support points of the tire frame; Step S2: Install the portal support tire frame at each tire frame support point, and fix the bottom of the portal support tire frame to the steel beam of the lower frame structure of the long-span steel structure to complete the installation of the portal support tire frame; Step S3, placing the round tube horizontally on the installed portal support frame, so that the frame support point of the round tube is located within the round tube intersection of the blade; Step S4: adjusting the position of the blade in the first notch and the second notch to adjust the installation accuracy of the round tube so that the installation of the round tube meets the preset requirements; Step S5: fixing the round tubes that meet the preset requirements on the upper frame of the long-span steel structure to complete the installation of the round tubes on the long-span steel structure; Step S6: According to the design drawings, the connecting parts are assembled between the round tubes that have been installed on the long-span steel structure, and the portal support frame is removed from the steel beams of the lower frame structure to complete the construction of the long-span steel structure.

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