Truss and large-span steel beam mixed installation structure and installation method

Abstract

The invention discloses a truss and large-span steel beam mixed installation structure and an installation method. The truss and large-span steel beam mixed installation structure comprises a set of temporary supporting frames, hanging steel beams, large-span steel beams, truss hanging columns, truss stand columns and a truss. The temporary support frame comprises a roadbed box, a plurality of groups of support standard knots, a group of lower conversion knots and a group of upper conversion knots; the roadbed box is arranged on a basement roof of-0.1 m; the supporting standard knots are arranged in a stacked mode, and joints are arranged between every two supporting standard knots for connection. The lower part of the lowermost supporting standard knot is connected with a lower conversion knot through a node; the lower conversion joint is welded and fixed with the roadbed box; the upper part of the uppermost supporting standard knot is connected with an upper conversion knot through a node; according to the installation method, after the temporary support is installed, the structure is hoisted through a 130-ton truck crane. The truss is manufactured in a segmented mode, the truck crane is installed in a segmented mode, auxiliary temporary supports are arranged, the problem that large hoisting machinery cannot be arranged due to insufficient bearing on an installation site is solved, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of truss installation, and in particular relates to a truss and long-span steel beam mixed installation structure and an installation method. Background Art

[0002] With the development of social economy, various novel structural systems are constantly introduced. The application of steel structure trusses can provide larger span space and load-bearing capacity. At the same time, because large-span steel structure trusses can meet the requirements of modern buildings for large space and high load-bearing capacity, the demand for their construction technology has increased and their application has become more and more extensive.

[0003] However, due to the high installation accuracy requirements such as truss arch control and the large linear span of the structure, as well as the excessive weight of the truss, the load-bearing capacity at the installation site is easily insufficient, which often leads to the inability to set up large lifting machinery, increasing construction costs.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a mixed installation structure and installation method of a truss and a large-span steel beam. The truss is manufactured in sections and installed in sections by a truck crane. A temporary support frame and supporting steel pipes are provided to assist in temporary support, which solves the problem of insufficient load-bearing capacity at the installation site and inability to set up large-scale lifting machinery, thereby improving construction efficiency.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a truss and large-span steel beam mixed installation structure, including: a group of temporary support frames, hanging steel beams, large-span steel beams, a group of truss hanging columns, a group of truss columns and trusses; the temporary support frame includes a roadbed box, several groups of support standard sections, a group of lower conversion sections and a group of upper conversion sections; the roadbed box is arranged on the -0.1m basement top plate; the support standard sections are stacked, and nodes are provided between them for connection; the lower part of the support standard section described at the bottom is connected to the lower conversion section through a node; the lower conversion section is welded and fixed to the roadbed box; the upper part of the support standard section described at the top is connected to the upper conversion section through a node; the hanging The hanging steel beam is set between the tops of a group of temporary support frames; the hanging steel beam is set between the tops of a group of temporary support frames; a positioning frame is set between the hanging steel beam and the top of the temporary support frame for positioning support, and the top of the temporary support frame is fixed by welding the positioning frame to the lower flange of the hanging steel beam; the large-span steel beam is set on the hanging steel beam, and its two ends are respectively connected to the towers on both sides; the hanging column stands on the large-span steel beam and is located on both sides of the temporary support frame; the truss column stands on the truss hanging column, and its two sides are respectively connected to the towers on both sides; the truss is set between the truss columns, and a supporting steel pipe is set between the truss column and the large-span steel beam; the large-span steel beam and the truss are connected to the towers on both sides through the embedded section. After installing the temporary support frame, the above structures are hoisted in turn by a 130-ton truck crane, and the positioning frame and supporting steel pipes are used for positioning support, which solves the problem of insufficient load-bearing of the -0.1m basement top plate and improves construction efficiency.

[0007] Furthermore, the supporting standard section includes four columns and diagonal bracing members; the columns are arranged in a square layout; the diagonal bracing members are arranged between the columns, and the connection stability with the columns is enhanced through the nodes. The diagonal bracing members can significantly improve the lateral stiffness of the structure without reducing the ductility and ultimate deformation capacity of the structure; at the same time, the diagonal bracing members transmit the gravity load from the upper layer to the lower layer by means of compression and tension of the floor slab, making the force transmission path clearer.

[0008] Furthermore, the diagonal brace webs form a square lattice between the columns; the center distance of the columns is set to 1500mm; the columns are made of Ф180*8 steel pipes; the diagonal brace webs are made of Ф102*6 steel pipes. The diagonal brace webs form a square lattice between the columns, which can reasonably distribute the force, making the structure more stable and effective when bearing loads; at the same time, the square lattice design can reduce the use of materials while ensuring the structural strength, thereby reducing the weight of the structure and reducing the load on the basement top plate.

[0009] Furthermore, the node includes a plurality of stiffening plates and a plurality of bolts; the stiffening plates are arranged perpendicular to the end faces of the components at both ends of the node, and one side is fixed to the components at both ends of the node; the bolts are arranged through the end faces of the components at both ends of the node. The stiffening plates can increase the local stiffness and strength of the node, making the node more stable and reducing deformation when bearing loads; the bolt connection can easily apply and control the preload force to ensure the reliability of the connection.

[0010] Furthermore, the truss includes a first truss and a second truss; the first truss and the second truss are connected at their end faces and are respectively connected to the towers on both sides; the first truss is a square steel pipe with a length of 11.1 meters and a weight of 24 tons; the second truss is a square steel pipe with a length of 8.7 meters and a weight of 18 tons; the supporting steel pipe is arranged below the first truss. The truss is manufactured in sections and installed in sections by the truck crane. The first truss is first installed through the supporting steel pipe, and then the second truss is installed according to the installed first truss, which reduces the lifting weight and solves the problem that the basement top plate is not able to bear the load and cannot use large lifting equipment.

[0011] Furthermore, a plurality of box-shaped inclined beams are welded between the two ends of the large-span steel beam and the truss suspender column; the inclined angle of the box-shaped inclined beam is 45°. The box-shaped inclined beam provides a more stable triangular structure for the connection between the large-span steel beam and the truss suspender column, ensuring the stability of the installation.

[0012] The present invention also provides an installation method of a truss and a large-span steel beam mixed installation structure, comprising the following steps: S1): Install a set of temporary support frames between the towers; S2): The 130-ton truck crane hoists the hanging steel beam between the upper ends of the temporary support frame, and the top of the temporary support frame is welded and fixed to the lower flange of the hanging steel beam through the positioning tire frame; S3): The 130-ton truck crane hoists the large-span steel beam onto the hanging steel beam, and the hanging steel beam is welded and fixed with a box-type inclined beam at an angle of 45°; S4): Immediately after the large-span steel beam is installed and fixed, the patch section connected to the tower structure is installed, and then a 130-ton truck crane is used to lift the truss column on the large-span steel beam. A temporary connecting plate is set at the bottom of the truss column to fix it to the large-span steel beam; S5): A 130-ton truck crane is used to hoist the truss column onto the truss suspension column. The truss column and the truss suspension column are temporarily fixed through a connecting plate. After the fixing is completed, the embedded section connected to the tower structure is immediately installed; S6): Set the supporting steel pipes, and the 130-ton truck crane will lift the truss between the truss columns and support it with the supporting steel pipes; S7): After the truss installation is completed, the temporary support frame and supporting steel pipe are removed. The temporary support and supporting steel pipe are used for temporary support during the installation process, providing a stable fulcrum for the installation process; after the installation is completed, they are removed and can be recycled, which improves the utilization rate of construction materials.

[0013] Furthermore, the specific operation of S6) is: S601): The hoisting support steel pipe is set on the large-span steel beam, and its lower part is welded and fixed to the large-span steel beam; S602): Install the first truss, hoist the first truss between the upper end of the supporting steel pipe and one side of the tower, fix one side of the first truss to the truss column through a temporary connecting plate, and fix the other end through a steel pipe support. After the first truss is fixed, immediately install the embedded section between the truss column; S603): Install the second truss, hoist the second truss between one side of the first truss and one side of the tower, and fix them with temporary connecting plates. After the second truss is fixed, immediately install the embedded section between the truss columns. The truss is installed in sections, with supporting steel pipes as support points, which reduces the lifting requirements and meets the load-bearing conditions of the -0.1m basement top plate.

[0014] It can be seen from the above technical solution that the present invention has the following beneficial effects: 1. The present invention discloses a truss and large-span steel beam hybrid installation structure and installation method, which designs a square grid structure in which the diagonal brace web members are arranged between the columns, so that the force can be reasonably distributed, making the structure more stable and effective when bearing loads; at the same time, the square grid structure design can reduce the use of materials while ensuring the structural strength, thereby reducing the weight of the structure and reducing the load on the basement roof; 2. The present invention provides a mixed installation structure and installation method of a truss and a large-span steel beam. The truss is manufactured in sections and installed in sections by a truck crane. A temporary support frame and supporting steel pipes are provided to assist in temporary support, thereby solving the problem of insufficient load-bearing capacity at the installation site and being unable to set up large-scale lifting machinery, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a truss and long-span steel beam hybrid installation structure according to the present invention; Figure 2 This is a structural schematic diagram of a first truss and a supporting steel pipe in a truss and long-span steel beam hybrid installation structure according to the present invention; Figure 3 It is a structural schematic diagram of the lower end of a temporary support frame in a truss and large-span steel beam mixed installation structure according to the present invention; Figure 4 It is a structural schematic diagram of the upper end of a temporary support frame in a truss and large-span steel beam mixed installation structure according to the present invention; Figure 5 It is a connection schematic diagram of a supporting standard section in a truss and a large-span steel beam hybrid installation structure according to the present invention; Figure 6 for Figure 5 Schematic diagram of the structure of the midpoint; Figure 7 It is a structural schematic diagram of a supporting standard section in a truss and long-span steel beam hybrid installation structure according to the present invention; Figure 8 A top view of a temporary support frame in a truss and long-span steel beam mixed installation structure according to the present invention; Fig. 9 It is an oblique view of a supporting standard section in a truss and long-span steel beam mixed installation structure according to the present invention; Fig.10 A diagram showing the steps of an installation method for a truss and long-span steel beam hybrid installation structure according to the present invention; In the figure: 1-temporary support frame; 11-roadbed box; 12-support standard section; 13-lower conversion section; 14-upper conversion section; 15-node; 16-positioning tire frame; 17-support steel pipe; 121-column; 122-bracing web member; 151-stiffening plate; 152-bolt; 2-Hanging steel beams; 3-Long span steel beam; 31-Box-type inclined beam; 4- Truss davit; 5-truss column; 6-truss; 61-first truss; 62-second truss; 7-Padding segment. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example

[0017] In this embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 5The present invention discloses a truss and long-span steel beam mixed installation structure, including a group of temporary support frames 1, hanging steel beams 2, long-span steel beams 3, a group of truss hangers 4, a group of truss columns 5 and trusses 6; the temporary support frame 1 includes a roadbed box 11, several groups of support standard sections 12, a group of lower conversion sections 13 and a group of upper conversion sections 14; the roadbed box 11 is arranged on the top plate of the -0.1m basement; the support standard sections 12 are stacked, and nodes 15 are provided between them for connection; the lower part of the support standard section 12 is connected to the lower conversion section 13 through the node 15; the lower conversion section 13 is welded and fixed to the roadbed box 11; the upper part of the support standard section 12 is connected to the upper conversion section 14 through the node 15; the hanging steel The beam 2 is arranged between the top ends of a group of temporary support frames 1; the hanging steel beam 2 is arranged between the top ends of a group of temporary support frames 1; a positioning cradle 16 is arranged between the hanging steel beam 2 and the top ends of the temporary support frames 1 for positioning support, and the top of the temporary support frame 1 is welded and fixed to the lower flange of the hanging steel beam 2 through the positioning cradle 16; the large-span steel beam 3 is arranged on the hanging steel beam 2, and its two ends are respectively connected to the towers on both sides; the hanging column 4 stands on the large-span steel beam 3, and is located on both sides of the temporary support frame 1; the truss column 5 stands on the truss hanging column 4, and its two sides are respectively connected to the towers on both sides; the truss 6 is arranged between the truss columns 5, and a supporting steel pipe 17 is arranged between the truss columns 5, and a supporting steel pipe 17 is arranged between the truss columns 5 and the large-span steel beam 3; the large-span steel beam 3 and the truss 6 are connected to the towers on both sides through the embedded section 7.

[0018] Specifically, the maximum plate thickness of the truss 6 and the large-span steel beam 3 is 60 mm, the main materials are Q355B and Q460GJC, the maximum cross-sectional size of the box type is 1200*700*30*60 (unit: mm), and the span of the truss 6 is 32 m.

[0019] Specifically, the hanging steel beam 2 adopts H800x300x18x30 steel, and the installation height is 22.35m; the large-span steel beam 3 adopts Q460GJC steel size, the cross-sectional size is 1200x600x30x50 (unit: mm), and the installation height is 26.85m.

[0020] Specifically, the long-span steel beam 3 and the truss column 5 are connected to the towers on both sides through a number of square tubes with a size of 700x30 (unit: mm).

[0021] In this embodiment, Figure 7 , Figure 8 and Fig. 9 The supporting standard section 12 includes four columns 121 and diagonal bracing members 122; the columns 121 are arranged in a square layout; the diagonal bracing members 122 are arranged between the columns 121, and the connection stability with the columns 121 is enhanced through the node 15.

[0022] Specifically, the diagonal brace member 122 is disposed on the side wall of the column 121 and is welded to the side wall of the column 121 ; a node 15 is provided at one end of the diagonal brace member 122 near the side wall of the column 121 to enhance the stability of the connection between the diagonal brace member 122 and the column 121 .

[0023] In this embodiment, Figure 7 , Figure 8 and Fig. 9 The diagonal bracing web members 122 form a square lattice structure between the columns 121; the center distance of the columns 121 is set to 1500mm; the columns 121 are made of Ф180*8 steel pipes; the diagonal bracing web members 122 are made of Ф102*6 steel pipes.

[0024] Specifically, the verticality of the column 121 needs to be adjusted during installation to ensure that the error is no greater than 1% and no greater than 15 mm.

[0025] In this embodiment, Figure 6 The node 15 includes a plurality of stiffening plates 151 and a plurality of bolts 152; the stiffening plates 151 are arranged perpendicular to the end faces of the components at both ends of the node 15, and one side is fixed to the components at both ends of the node 15; the bolts 152 are arranged through the end faces of the components at both ends of the node 15.

[0026] Specifically, the stiffening plates 151 are disposed between the end surfaces of the components at both ends of the node 15 and the riser, and are connected by welding.

[0027] In this embodiment, Figure 1 and Figure 2 The first truss 61 and the second truss 62 are connected at the end faces and are respectively connected to the towers on both sides; the first truss 61 is a square steel pipe with a length of 11.1 meters and a weight of 24 tons; the second truss 62 is a square steel pipe with a length of 8.7 meters and a weight of 18 tons; the supporting steel pipe 17 is arranged below the first truss 61.

[0028] Specifically, the first truss 61 and the second truss 62 are made of Q460GJC steel, and the installation height range is 31.34m~35.85m.

[0029] Specifically, Figure 1 The first truss 61 and the second truss 62 are both composed of a plurality of square tubes with a size of 700x30 (unit: mm). The 700x30 square tubes form a triangular structure, which enhances the stability of the first truss 61 and the second truss 62.

[0030] In this embodiment, Figure 1 A plurality of box-shaped inclined beams 31 are welded between the two ends of the large-span steel beam 3 and the truss hanger 4; the inclination angle of the box-shaped inclined beam 31 is 45°.

[0031] Specifically, the box-type inclined beam 31 is a square tube with a size of 400x20 (unit: mm), and is diagonally supported between the large-span steel beam 3 and the end span of the truss suspender 4.

[0032] In this embodiment, Fig.10 The present invention also discloses a method for installing a truss and a large-span steel beam hybrid installation structure, comprising the following steps: S1): Install a set of temporary support frames between the towers; S2): The 130-ton truck crane hoists the hanging steel beam between the upper ends of the temporary support frame, and the top of the temporary support frame is welded and fixed to the lower flange of the hanging steel beam through the positioning tire frame; S3): The 130-ton truck crane hoists the large-span steel beam onto the hanging steel beam, and the hanging steel beam is welded and fixed with a box-type inclined beam at an angle of 45°; S4): Immediately after the large-span steel beam is installed and fixed, the patch section connected to the tower structure is installed, and then a 130-ton truck crane is used to lift the truss column on the large-span steel beam. A temporary connecting plate is set at the bottom of the truss column to fix it to the large-span steel beam; S5): A 130-ton truck crane is used to hoist the truss column onto the truss suspension column. The truss column and the truss suspension column are temporarily fixed through a connecting plate. After the fixing is completed, the embedded section connected to the tower structure is immediately installed; S6): Set the supporting steel pipes, and the 130-ton truck crane will lift the truss between the truss columns and support it with the supporting steel pipes; S7): After the truss installation is completed, the temporary support frame and supporting steel pipes are removed.

[0033] Specifically, in order to ensure the stability of the temporary support frame itself, especially the stability of the higher temporary support frame, it is necessary to set up guy ropes and tie the horizontal supports to connect the supports into a whole; when the guy rope needs to change its position, the anchor point at the predetermined position must be made first, and a temporary guy rope must be added to ensure stability, and then the position of the original guy rope must be moved; after it is fastened to the anchor point, the temporary guy rope can be removed.

[0034] In particular, guy ropes are provided to tie the support to the main structure as a secondary option.

[0035] In this embodiment, the specific operation of S6) is: S601): The hoisting support steel pipe is set on the large-span steel beam, and its lower part is welded and fixed to the large-span steel beam; S602): Install the first truss, hoist the first truss between the upper end of the supporting steel pipe and one side of the tower, fix one side of the first truss to the truss column through a temporary connecting plate, and fix the other end through a steel pipe support. After the first truss is fixed, immediately install the embedded section between the truss column; S603): Install the second truss, hoist the second truss between one side of the first truss and one side of the tower, and fix them through temporary connecting plates. After the second truss is fixed, immediately install the embedded section between the truss columns.

[0036] Specifically, the section weight table of each main structure is as follows: The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A truss and long-span steel beam hybrid installation structure, characterized in that: include: A temporary support frame (1), the temporary support frame (1) comprising a roadbed box (11), a plurality of groups of support standard sections (12), a group of lower conversion sections (13) and a group of upper conversion sections (14); The roadbed box (11) is arranged on the top plate of the -0.1m basement; the supporting standard sections (12) are stacked and provided with nodes (15) between each other for connection; the bottom of the supporting standard section (12) is connected to the lower conversion section (13) via the node (15); the lower conversion section (13) is welded and fixed to the roadbed box (11); the top of the supporting standard section (12) is connected to the upper conversion section (14) via the node (15); A hanging steel beam (2), wherein the hanging steel beam (2) is arranged between the top ends of a group of temporary support frames (1); a positioning frame (16) is arranged between the hanging steel beam (2) and the top ends of the temporary support frames (1) for positioning support, and the top of the temporary support frames (1) is welded and fixed to the lower flange of the hanging steel beam (2) through the positioning frame (16); A large-span steel beam (3), wherein the large-span steel beam (3) is arranged on the hanging steel beam (2), and the two ends of the large-span steel beam are respectively connected to the towers on both sides; A group of truss hanging columns (4), wherein the hanging columns (4) are erected on the large-span steel beam (3) and are located near both sides of the temporary support frame (1); A group of truss columns (5), wherein the truss columns (5) are erected on the truss suspenders (4) and are connected to the towers on both sides at two sides respectively; A truss (6), wherein the truss (6) is arranged between the truss columns (5), and a supporting steel pipe (17) is arranged between the truss (6) and the large-span steel beam (3); The large-span steel beam (3) and the truss (6) are connected to the towers on both sides via the embedded sections (7).

2. The truss and long-span steel beam hybrid installation structure according to claim 1 is characterized in that: The supporting standard section (12) comprises four columns (121) and a diagonal bracing web member (122); The columns (121) are arranged in a square layout; the diagonal bracing web members (122) are arranged between the columns (121) and enhance the stability of the connection with the columns (121) through the nodes (15).

3. The truss and long-span steel beam hybrid installation structure according to claim 1 is characterized in that: The diagonal bracing web members (122) form a square lattice structure between the columns (121); the center distance of the columns (121) is set to 1500 mm; the columns (121) are made of Φ180*8 steel pipes; and the diagonal bracing web members (122) are made of Φ102*6 steel pipes.

4. The truss and long-span steel beam hybrid installation structure according to claim 2 is characterized in that: The node (15) comprises a plurality of stiffening plates (151) and a plurality of bolts (152); The stiffening plate (151) is arranged perpendicular to the end surfaces of the components at both ends of the node (15), and one side is fixed to the components at both ends of the node (15); the bolt (152) is arranged to pass through the end surfaces of the components at both ends of the node (15).

5. The truss and long-span steel beam hybrid installation structure according to claim 1 is characterized in that: The truss (6) comprises a first truss (61) and a second truss (62); The first truss (61) and the second truss (62) are connected at their end faces and are respectively connected to the towers on both sides; the first truss (61) is a square steel pipe with a length of 11.1 meters and a weight of 24 tons; the second truss (62) is a square steel pipe with a length of 8.7 meters and a weight of 18 tons; the supporting steel pipe (17) is arranged below the first truss (61).

6. The truss and long-span steel beam hybrid installation structure according to claim 1 is characterized in that: A plurality of box-shaped inclined beams (31) are welded between the two ends of the large-span steel beam (3) and the truss suspension column (4); the inclined angle of the box-shaped inclined beams (31) is 45°.

7. A method for installing a truss and a large-span steel beam hybrid installation structure, used to install the truss and a large-span steel beam hybrid installation structure according to claims 1 to 6, characterized in that: The steps include: S1): Install a set of temporary support frames between the towers; S2): The 130-ton truck crane hoists the hanging steel beam between the upper ends of the temporary support frame, and the top of the temporary support frame is welded and fixed to the lower flange of the hanging steel beam through the positioning tire frame; S3): The 130-ton truck crane hoists the large-span steel beam onto the hanging steel beam, and the hanging steel beam is welded and fixed with a box-type inclined beam at an angle of 45°; S4): Immediately after the large-span steel beam is installed and fixed, the patch section connected to the tower structure is installed, and then a 130-ton truck crane is used to lift the truss column on the large-span steel beam. A temporary connecting plate is set at the bottom of the truss column to fix it to the large-span steel beam; S5): A 130-ton truck crane is used to hoist the truss column onto the truss suspension column. The truss column and the truss suspension column are temporarily fixed through a connecting plate. After the fixing is completed, the embedded section connected to the tower structure is immediately installed; S6): Set the supporting steel pipes, and the 130-ton truck crane will lift the truss between the truss columns and support it with the supporting steel pipes; S7): After the truss installation is completed, the temporary support frame and supporting steel pipes are removed.

8. The installation method of the truss and long-span steel beam hybrid installation structure according to claim 7 is characterized in that: The specific operation of S6) is: S601): The hoisting support steel pipe is set on the large-span steel beam, and its lower part is welded and fixed to the large-span steel beam; S602): Install the first truss, hoist the first truss between the upper end of the supporting steel pipe and one side of the tower, fix one side of the first truss to the truss column through a temporary connecting plate, and fix the other end through a steel pipe support. After the first truss is fixed, immediately install the embedded section between the truss column; S603): Install the second truss, hoist the second truss between one side of the first truss and one side of the tower, and fix them through temporary connecting plates. After the second truss is fixed, immediately install the embedded section between the truss columns.

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