A method for constructing tubular trusses

Abstract

This invention provides a method for constructing a tubular truss, belonging to the field of tubular truss installation technology, including the following steps: Step 1, establishing a three-dimensional model of the tubular truss to obtain the coordinate information of each pipe component; Step 2, selecting two pipe components associated with the cast steel node in the tubular truss as positioning pipes, and positioning and installing the positioning pipes; Step 3, connecting the two pipe ends of the cast steel node with the two positioning pipes and welding them for fixation; Step 4, sequentially installing the other pipe components in the tubular truss to obtain the formed tubular truss. The tubular truss construction method provided by this invention, by selecting two pipe components in the tubular truss as positioning pipes, first positioning and installing the positioning pipes, and then using the position of the positioning pipes, can quickly complete the positioning of the cast steel node. The positioning of the positioning pipes is simpler than the positioning of the cast steel node, improving construction efficiency, and eliminating the need for complex support jigs for the cast steel node, saving construction costs, and quickly and accurately completing the installation of the cast steel node, thus accelerating the installation of the tubular truss.

Description

Technical Field

[0001] This invention relates to the field of tubular truss installation technology, and more specifically to a tubular truss construction method. Background Technology

[0002] Currently, steel structure is developing rapidly across the country, and the application of large-span tubular truss structures is becoming increasingly widespread. The intersecting nodes of multiple pipes are complex, and it is difficult to ensure the welding quality. Cast steel nodes are used to ensure the quality of the nodes. At present, the construction steps of tubular trusses are to first locate the cast steel nodes, and then install the relevant pipe fittings after the cast steel nodes are located.

[0003] However, due to the large number of pipe openings in the cast steel joint, at least three pipe opening measurement points need to be marked for accurate positioning. The measurement and verification process is cumbersome, time-consuming, and has low positioning efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low positioning efficiency in the prior art when locating cast steel nodes during the construction of tubular trusses, thereby providing a tubular truss construction method.

[0005] To solve the above-mentioned technical problems, the present invention provides a method for constructing a tubular truss, comprising the following steps:

[0006] Step 1: Create a 3D model of the tubular truss to obtain the coordinate information of each tubular component;

[0007] Step 2: Select two pipe fittings in the tubular truss that are associated with the cast steel node as positioning pipes, and position and install the positioning pipes.

[0008] Step 3: Connect the two pipe openings of the cast steel node to the two positioning pipes and weld them in place;

[0009] Step 4: Install the other pipe components in the tubular truss in sequence to obtain the formed tubular truss.

[0010] Optionally, in step two, the bottom unit is first installed using the bottom frame.

[0011] Optionally, at least one of the positioning tubes is connected to the bottom unit.

[0012] Optionally, the two positioning tubes can be fixed by welding a first temporary support frame.

[0013] Optionally, in step three, before welding and fixing, a control point on the cast steel node is checked and calibrated using a total station.

[0014] Optionally, after welding and fixing, a second temporary support frame is welded onto the cast steel node.

[0015] Optionally, both positioning tubes are main components of the tubular truss.

[0016] Optionally, the two positioning tubes have different three-dimensional angles in space.

[0017] Optionally, the cast steel node is hoisted using a three-point hoisting method. The hoisting equipment has three hoisting ropes, which are connected to three points on the cast steel node respectively, and an electric hoist is installed on the hoisting ropes.

[0018] Optionally, in step four, the main pipe components of the tubular truss are installed first, followed by the secondary pipe components.

[0019] The technical solution of this invention has the following advantages:

[0020] 1. The tubular truss construction method provided by the present invention includes the following steps: after establishing a three-dimensional model and obtaining the coordinate information of the pipe fittings, two pipe fittings associated with the cast steel node in the tubular truss are selected as positioning pipes, and the positioning pipes are positioned and installed; then the two pipe openings of the cast steel node are connected to the two positioning pipes and welded and fixed; finally, the other pipe fittings in the tubular truss are installed in sequence to obtain the formed tubular truss.

[0021] By selecting two tubes in the tubular truss as positioning tubes, the positioning of the cast steel node can be quickly completed by first positioning and installing the positioning tubes. Positioning the positioning tubes is simpler and faster than positioning the cast steel node, which improves construction efficiency. Moreover, there is no need to set up a complex support frame for the cast steel node, saving construction costs. The installation of the cast steel node can be completed quickly and with high precision, which greatly speeds up the installation of the tubular truss unit.

[0022] 2. The tubular truss construction method provided by the present invention, in step two, firstly installs the bottom unit of the tubular truss to complete the installation of the base part of the tubular truss. By selecting at least one positioning pipe connected to the bottom unit, the positioning and installation are carried out sequentially from the bottom unit to the positioning pipe and then to the cast steel node, making the positioning process simple, convenient and accurate.

[0023] 3. The truss construction method provided by the present invention fixes two positioning pipes by welding a first temporary support frame. After positioning the positioning pipes, welding is performed through the first temporary support frame, which improves the stability of the positioning pipes and thus improves the stability of the subsequent cast steel nodes after installation.

[0024] 4. In the truss construction method provided by the present invention, in step three, before welding and fixing, a control point on the cast steel node is checked and corrected using a total station. After welding and fixing, a second temporary support frame is welded on the cast steel node. By checking and correcting only one control point using a total station, the accurate position of the cast steel node can be guaranteed. The welding of the second temporary support frame ensures the stability of the cast steel node and avoids its large weight causing it to sink and affect the accurate installation of subsequent pipe fittings.

[0025] 5. The truss construction method provided by this invention uses two positioning pipes as main components of the truss. The main components have a large cross-section, better stress resistance, and higher positioning requirements. As long as the positioning pipes are positioned and installed in advance, it is more conducive to the accurate positioning of the cast steel nodes, which further ensures the accuracy of the installation of other pipe components extending from the cast steel nodes.

[0026] 6. The truss construction method provided by the present invention has two positioning tubes with different three-dimensional angles in space, which makes it easier to position the cast steel nodes in different directions when they are connected.

[0027] 7. The truss construction method provided by this invention uses a three-point hoisting method for the cast steel nodes. The hoisting equipment has three hoisting ropes, which are connected to three points on the cast steel node respectively. Electric hoists are installed on the hoisting ropes. The three-point hoisting method ensures the stability of the cast steel node during the hoisting process. By adjusting the electric hoists on the hoisting ropes, the cast steel node can be finely adjusted in different directions, which facilitates timely adjustment to complete the docking with the positioning pipe.

[0028] 8. In the tubular truss construction method provided by the present invention, in step four, the main tubes of the tubular truss are installed first, and then the secondary tubes of the tubular truss are installed. In the installation of the tubes, as long as the main tubes are positioned well, the overall dimensions of the entire unit will be basically correct. The secondary tubes can be assembled according to the positioning spacing of the main tubes, which greatly improves the installation efficiency of the tubular truss. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the tubular truss provided in an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the cast steel node in the diagram;

[0032] Figure 3 This is a schematic diagram of the structure for installing the bottom unit in the truss construction method provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure for installing positioning pipes in the truss construction method provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure for installing cast steel nodes in the tubular truss construction method provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure after the tubular truss is installed in the tubular truss construction method provided in the embodiments of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Pipe truss; 2. Cast steel node; 3. Positioning pipe; 4. Bottom layer frame; 5. Bottom layer unit; 6. First temporary support frame; 7. Measurement and control point; 8. Second temporary support frame; 9. First measurement and control point; 10. Second measurement and control point; 11. First pipe fitting; 12. Second pipe fitting. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] like Figure 1 The diagram shown is a schematic representation of the overall structure of the tubular truss provided in this embodiment. Figure 2 This is a structural schematic diagram of a cast steel node. The use of cast steel nodes ensures the quality of the nodes between multiple pipes. Since the cast steel node is a complex irregular structure, its positioning is relatively complicated. At least three points on the cast steel node need to be marked and positioned to ensure accuracy. After positioning, a complex support frame needs to be laid at the bottom, which reduces the positioning and installation efficiency.

[0043] The tubular truss construction method provided in this embodiment is used for the installation of tubular trusses. During the installation process, the cast steel nodes are positioned and installed using the tubular components themselves, which improves the positioning and installation efficiency of the cast steel nodes.

[0044] like Figures 1 to 6 The diagram illustrates a specific implementation of the tubular truss construction method provided in this embodiment, comprising the following steps: Step 1, establishing a three-dimensional model of the tubular truss 1 to obtain the coordinate information of each pipe component; Step 2, selecting two pipe components in the tubular truss 1 associated with the cast steel node 2 as positioning pipes 3, and positioning and installing the positioning pipes 3; Step 3, connecting the two pipe openings of the cast steel node 2 with the two positioning pipes 3 and welding them for fixation; Step 4, sequentially installing the other pipe components in the tubular truss 1 to obtain the formed tubular truss.

[0045] By selecting two pipes in the tubular truss 1 as positioning pipes 3, the positioning pipes 3 are first positioned and installed. Then, the positioning of the cast steel node 2 can be quickly completed by using the position of the positioning pipes 3. The positioning of the positioning pipes 3 is simpler and faster than that of the cast steel node 2, which improves the construction efficiency. Moreover, there is no need to set up a complex support frame for the cast steel node 2, which saves construction costs. The installation of the cast steel node can be completed quickly and with high precision, which greatly speeds up the installation of the tubular truss unit.

[0046] like Figure 3As shown, in the truss construction method provided in this embodiment, in step two, the bottom unit 5 is first installed using the bottom frame 4. Specifically, based on the coordinate information of each pipe obtained in step one, and according to the connection points and positional relationships of each pipe in the bottom unit 5, a reasonable bottom frame 4 is set up. The bottom frame 4 does not need to be set up with complex units; only support rods need to be welded at the corresponding positions. The setting of the bottom frame 4 facilitates the installation of the bottom unit 5 and also adapts to the characteristic that the bottom surface of the bottom unit 5 is not flat. The bottom frame 4 and the bottom unit 5 are intermittently welded, which not only has good stability but also facilitates the subsequent dismantling of the bottom frame 4.

[0047] like Figure 4 As shown, in the truss construction method provided in this embodiment, at least one of the positioning pipes 3 is connected to the bottom unit 5. By selecting at least one positioning pipe 3 connected to the bottom unit 5, and sequentially positioning and installing it from the bottom unit 5 to the positioning pipe 3 and then to the cast steel node 2, the positioning process is simple, convenient, and accurate. Specifically, one positioning pipe 3 is connected to the bottom unit 5, one end of which is welded to the bottom unit 5, and the other end is provided with a first control point 9. After verifying the first control point 9, a first temporary support frame 6 is welded below this positioning pipe 3. The other positioning pipe 3 can be an independent pipe or a pipe connected to other installed pipes. One method is... Figure 4 Another positioning tube 3 is connected to the first pipe fitting 11. A second control point 10 is set at the other end of the other positioning tube 3. After verifying the second control point 10, a first temporary support frame 6 is welded below the positioning tube 3 to complete the positioning and fixing of the two positioning tubes 3. By fixing the two positioning tubes 3 by welding the first temporary support frame 6, the stability of the positioning tubes 3 is improved, thereby improving the stability after the subsequent installation of the cast steel node 2.

[0048] For the positioning of the two positioning tubes 3, they need to be hoisted to the approximate position using hoisting equipment, and then the corresponding coordinates are aligned using measuring equipment, such as a total station. After adjusting to the appropriate position, the first control point 9 and the second control point 10 are checked and corrected to further ensure the positional accuracy of the positioning tubes 3, thereby ensuring the positional accuracy of the cast steel node 2.

[0049] For other main components in the tubular truss 1 that are not associated with the cast steel node 2, the second pipe component 12 in the figure can be installed simultaneously with the cast steel node 2, or it can be installed after the cast steel node 2 is installed.

[0050] like Figure 5As shown, in the truss construction method provided in this embodiment, before welding and fixing in step three, a control point 7 on the cast steel node 2 is checked and corrected using a total station. By checking and correcting only one control point 7 with a total station, the accurate position of the cast steel node 2 can be guaranteed. The control point 7 is selected at the pipe opening position that does not connect with the two positioning pipes 3.

[0051] The truss construction method provided in this embodiment involves welding a second temporary support frame 8 onto the cast steel node 2 after welding. The welding of the second temporary support frame 8 ensures the stability of the cast steel node 2, preventing its heavy weight from causing it to sink and affecting the accurate installation of subsequent pipe fittings. Both the first temporary support frame 6 and the second temporary support frame 8 are fixedly connected to the pipe fittings using intermittent welding, facilitating stable fixing and subsequent dismantling. Specifically, the installation process involves lifting the cast steel node 2 with hoisting equipment, completing the docking, position verification, and welding fixation, then deploying the second temporary support frame 8, and finally releasing the hooks of the hoisting equipment to complete the final fixing of the cast steel node 2.

[0052] like Figure 4 The truss construction method provided in this embodiment uses two positioning pipes 3 as main components of the truss 1. The main components have larger cross-sections, better stress distribution, and higher positioning requirements. Pre-positioning and installing the positioning pipes facilitates precise positioning of the cast steel node 2, further ensuring the accuracy of installation of other pipe components extending from the cast steel node. Specifically, for the selection of main components, those that can be directly positioned and installed and are associated with the cast steel node 2 are generally chosen.

[0053] The truss construction method provided in this embodiment uses two positioning tubes 3 with different three-dimensional angles in space, making it easier to position the cast steel nodes 2 in different directions during docking. Specifically, having different three-dimensional angles in space can be understood as the two positioning tubes 3 being located on different surfaces.

[0054] like Figure 5 As shown in the embodiment, the truss construction method provides that the cast steel node 2 is hoisted using a three-point hoisting method. The hoisting equipment has three lifting ropes, which are connected to three points on the cast steel node 2 respectively. Electric hoists are installed on the lifting ropes. The three-point hoisting method ensures the stability of the cast steel node 2 during hoisting. Fine-tuning of the cast steel node 2 in different directions is achieved by adjusting the electric hoists on the lifting ropes, facilitating timely adjustments to complete the docking with the positioning pipe 3. Alternatively, as an alternative implementation, multiple hoisting devices can be used to simultaneously hoist the cast steel node 2. Adjustment of the cast steel node 2 in different directions can be achieved through the coordinated adjustment of different hoisting devices.

[0055] The truss construction method provided in this embodiment involves first installing the main pipe of the truss 1 in step four, and then installing the secondary pipes of the truss 1. In the installation of the pipes, as long as the main pipe is positioned correctly, the overall dimensions of the unit will be basically correct. The secondary pipes can be assembled according to the positioning spacing of the main pipe, which greatly improves the installation efficiency of the truss.

[0056] The specific construction steps for the tubular truss include:

[0057] Install the bottom unit 5, such as Figure 3 As shown;

[0058] Install the associated positioning pipe 3, and simultaneously install the unassociated second pipe fitting 12, such as... Figure 4 As shown;

[0059] Install cast steel node 2, connect cast steel node 2 to positioning pipe 3, verify and correct the position of control point 7, and then weld and fix cast steel node 2. Figure 5 As shown;

[0060] Other pipe fittings for installing pipe truss 1 can be quickly positioned based on the already installed pipe fittings, or they can be independently positioned using temporary support frames, such as... Figure 6 As shown;

[0061] Remove the bottom frame 4, the first temporary support frame 6, the second temporary support frame 8 and other temporary supports for pipes to complete the overall installation of the pipe truss 1. Then, use hoisting equipment to lift the pipe truss 1 to the corresponding position for fixing. In this embodiment, the pipe truss 1 is installed in the structure of the main stadium.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for constructing a tubular truss, characterized in that, Includes the following steps: Step 1: Establish a three-dimensional model of the tubular truss (1) and obtain the coordinate information of each tube component; Step 2: Select two pipe fittings in the pipe truss (1) that are associated with the cast steel node (2) as positioning pipes (3), and position and install the positioning pipes (3); Step 3: Connect the two pipe openings of the cast steel node (2) to the two positioning pipes (3) and weld them in place; Step 4: Install the other pipe fittings in the pipe truss (1) in sequence to obtain the formed pipe truss; In step two, the bottom unit (5) is first installed through the bottom frame (4); At least one of the positioning tubes (3) is connected to the bottom unit (5); The two positioning tubes (3) are fixed by welding the first temporary support frame (6); Both of the positioning tubes (3) are the main components of the tubular truss (1); The two positioning tubes (3) have different three-dimensional angles in space.

2. The method for constructing a tubular truss according to claim 1, characterized in that, In step three, before welding and fixing, a control point (7) on the cast steel node (2) is checked and corrected using a total station.

3. The method for constructing a tubular truss according to claim 2, characterized in that, After welding and fixing, a second temporary support frame (8) is welded on the cast steel node (2).

4. The method for constructing a tubular truss according to any one of claims 1-3, characterized in that, The cast steel node (2) is hoisted using a three-point hoisting method. The hoisting equipment has three hoisting ropes, which are connected to the three points of the cast steel node (2) respectively. An electric hoist is installed on the hoisting ropes.

5. The method for constructing a tubular truss according to any one of claims 1-3, characterized in that, In step four, the main pipe of the tubular truss (1) is installed first, and then the secondary pipe of the tubular truss (1) is installed.

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