Irregular arc-shaped pipe truss chord web member assembly model and positioning construction and design method

Abstract

The invention discloses an irregular arc-shaped pipe truss chord web member assembling and positioning construction method. Model deepening is conducted according to a design drawing, a main truss is machined and manufactured, intersecting opening cutting and bent pipe machining are conducted on ring truss chord web member spare parts, and the ring truss chord web member spare parts are transported to a construction site. Angle steel, round steel and the like are used on site for construction through simulation trusses. The invention aims to create a ground overall assembly construction method for the irregular arc-shaped ring truss in the pipe truss structure, and the overall installation efficiency of the truss structure is improved. The high-altitude bulk work amount is reduced, the situation that an operator needs to walk back and forth on the round pipe is avoided, and the safety of truss structure construction is improved. And high-altitude welding is changed into ground welding, so that the welding quality is improved while the safety is ensured.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering truss installation, and in particular relates to an irregular arc-shaped tube truss chord-web member assembly model, positioning construction and design method. Background Art

[0002] In order to meet the needs of large spaces such as stadiums and railway stations, the structural form is usually a tube truss structure, which is mainly composed of a central roof, steel columns, roof, main trusses, and secondary trusses. Among them, the secondary truss structure is often designed as an irregular arc structure in space to match the architectural shape. During on-site construction, the chords and webs of the secondary trusses may be restricted by conditions such as lifting or transportation. This construction method is not only inefficient but also has a high risk factor for high-altitude installation. At the same time, the connection of the tube truss structure is mainly welding, and the quality of high-altitude welding is not easy to guarantee. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an irregular arc tube truss chord-web member assembly model, positioning construction and design method, which solves the problems of low efficiency and high risk factor of the construction method in the prior art.

[0004] The present invention adopts the following technical solutions to solve the above technical problems:

[0005] An irregular arc-shaped tube truss chord-web member assembly and positioning construction method comprises the following steps:

[0006] Step 1: Build the design model, process and manufacture the main truss, cut the intersections of the ring truss chord web parts, bend the pipes, and transport them to the construction site;

[0007] Step 2: Mark the relative coordinates of the ends of the upper and lower chords of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords;

[0008] Step 3: According to the coordinate points in the model, simulate the positions of the chords of two adjacent main trusses on site to make a simulated truss;

[0009] Step 4: According to the distance between the ring truss and the end in the drawing, spot weld the upper and lower chords on the simulated truss;

[0010] Step 5: The upper and lower chords of the ring truss find the installation angles that match the simulated truss according to their intersections, spot weld them, and install the corresponding webs;

[0011] Step 6: After the overall welding of the ring truss chord web is completed, it is removed from the simulated truss and hoisted onto the main structure as a whole.

[0012] In step 3, the specific process of making the simulated truss is as follows:

[0013] According to the size of the intersection, cut a section of round tube of the same specification and put it on the outside of the angle steel. The round steel is fixed by spot welding inside the round tube so that it can slide on the angle steel. At the same time, the back of the angle steel is always in the center of the round tube.

[0014] Move the round tubes on the upper and lower chords of the simulated truss to the corresponding positions and fix them by spot welding.

[0015] In step 5, when the deadweight of the ring truss is greater than the set threshold, auxiliary supports are provided, and the chord web members of the ring truss are integrally welded after being assembled in place.

[0016] An irregular arc-shaped tube truss chord-web assembly device model includes a simulated truss, the simulated truss is relatively spatially positioned according to the main truss, and then the ring truss chord-web is installed between the simulated trusses;

[0017] The simulated truss includes a section of round tube, which is sleeved on the outside of the angle steel, and the back of the angle steel is at the center of the round tube. One end of the round steel is fixed by spot welding inside the round tube so that the other end can slide on the angle steel, and the back of the angle steel is always at the center of the round tube.

[0018] The upper and lower chords of the ring truss are installed in accordance with their intersections and matched with the simulated truss, fixed with spot welding, and the corresponding web members are installed.

[0019] Mark the relative coordinates of the centers of the upper and lower chord ends of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords.

[0020] The spatial coordinates of each end point and inflection point of the main truss are determined through actual measurement. The measured points are placed in the CAD three-dimensional space system and then converted into the three-dimensional basic coordinate system so that the lower chord of the main truss is placed parallel to the ground.

[0021] The design method of the irregular arc tube truss chord web assembly device comprises the following steps:

[0022] Step a: deepen the steel structure model according to the design drawing, and obtain the parameters for processing the whole main truss and bending the ring truss chord web parts and CNC cutting of the intersection according to the deepened model;

[0023] Step b: After the main truss is hoisted in place, the spatial coordinates of each end point and inflection point of the main truss at the construction site are measured and obtained;

[0024] Step c, input the coordinates obtained by actual measurement into the CAD three-dimensional model, and then convert the CAD three-dimensional basic coordinate system so that the lower chord of the main truss is close to the position parallel to the ground;

[0025] Step d, according to the spatial coordinates of each endpoint and inflection point in the converted CAD three-dimensional model, determine the relative positions of the two adjacent main truss chords for on-site simulation, and determine the on-site installation materials and installation parameters of the simulated truss according to the size of the intersection of the ring truss chords;

[0026] Step e: Determine the fixed positions of the upper and lower chords of the simulated truss according to the distance between the connection node between the ring truss and the main truss and the end of the main truss in the drawing;

[0027] Step f, determining the intersecting connection position with the simulated truss according to the size of the intersecting openings of the upper and lower chords of the ring truss, and determining the fixing positions of the upper and lower chords of the ring truss and the connection position with the web of the ring truss according to the node positioning and the designed intersecting gap between the circular tubes;

[0028] Step g: Output the design drawings based on all the determined parameters.

[0029] In step d, angle steel is used to simulate the relative position of two adjacent main truss chords. A round tube is set on the outside of the angle steel, and the back of the angle steel is kept at the center of the round tube. Round steel that can slide on the angle steel is spot welded inside the round tube to ensure that the back of the angle steel is always in the center of the round tube.

[0030] In step g, according to all the determined parameters, the process of assembling the ring truss on the ground as a whole and then removing it from the simulated truss is pre-simulated, and then the design drawings are output.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention aims to create a ground integral assembly construction method for irregular arc-shaped ring trusses in a tube truss structure, thereby improving the overall installation efficiency of the truss structure.

[0033] 2. It reduces the amount of bulk work at high altitude, avoids the need for workers to walk back and forth on the round pipe, and improves the safety of truss structure construction.

[0034] 3. Changing high-altitude welding to ground welding ensures safety while improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Find out the main truss end coordinate schematic diagram for the present invention.

[0036] Figure 2 This is a schematic diagram of a simulated truss for on-site processing of angle steel according to the present invention.

[0037] Figure 3 for Figure 2 Section view along AA.

[0038] Figure 4 It is a schematic diagram of assembling the diagonal web members of the ring truss of the present invention.

[0039] Among them, the markings in the figure are: 1-angle steel; 2-round tube; 3-diagonal brace; 4-round steel; 5-chord; 6-web member. DETAILED DESCRIPTION

[0040] The structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0041] An irregular arc-shaped tube truss chord-web member assembly and positioning construction method comprises the following steps:

[0042] Step 1: Build the design model, process and manufacture the main truss, cut the intersections of the ring truss chord web parts, bend the pipes, and transport them to the construction site;

[0043] Step 2: Mark the relative coordinates of the ends of the upper and lower chords of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords;

[0044] Step 3: According to the coordinate points in the model, simulate the positions of the chords of two adjacent main trusses on site to make a simulated truss;

[0045] Step 4: According to the distance between the ring truss and the end in the drawing, spot weld the upper and lower chords on the simulated truss;

[0046] Step 5: The upper and lower chords of the ring truss find the installation angles that match the simulated truss according to their intersections, and then spot weld and fix them and install the corresponding webs;

[0047] Step 6: After the overall welding of the ring truss chord web is completed, it is removed from the simulated truss and hoisted onto the main structure as a whole.

[0048] Specific embodiments, such as Figures 1 to 4 As shown,

[0049] An irregular arc tube truss chord web assembly positioning construction method, using an irregular arc tube truss chord web assembly device model, including a simulated truss, the simulated truss is relatively spatially positioned according to the main truss, and then the ring truss chord web is installed between the simulated trusses;

[0050] The simulated truss includes a section of round tube 2, which is sleeved on the outside of angle steel 1, with the back of angle steel 1 at the center of round tube 2. One end of round steel 4 is spot welded inside the round tube 2 so that the other end can slide on the angle steel 1, and the back of the angle steel is always at the center of the round tube 2; diagonal braces 3 are connected between the angle steels.

[0051] The upper and lower chords 5 of the ring truss are installed in accordance with their intersections and matched with the simulated truss, and are fixed by spot welding and the corresponding web members 6 are installed.

[0052] Mark the relative coordinates of the centers of the upper and lower chord ends of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords.

[0053] The spatial coordinates of each end point and inflection point of the main truss are determined through actual measurement. The measured points are placed in the CAD three-dimensional space system and then converted into the three-dimensional basic coordinate system so that the lower chord of the main truss is placed parallel to the ground.

[0054] The construction specifically includes the following steps:

[0055] Step 1: Deepen the steel structure model according to the design drawing. The processing plant will process the whole main truss and the ring truss chord web parts according to the deepened model, and perform pipe bending and CNC cutting of the intersections. Mark the relative coordinates of the center of the upper and lower chord ends of the main truss in the model. If the chord is a broken line type, the coordinates of the inflection point must also be marked.

[0056] Step 2: First, hoist the main truss into place at the construction site, weld it and then measure the spatial coordinates of each end point and turning point of the main truss.

[0057] Step 3: Input the coordinates obtained from the actual measurement into the CAD three-dimensional model, and then convert the CAD three-dimensional basic coordinate system so that the lower chord of the main truss is placed as close to the ground as possible and parallel to the ground, so as to facilitate the assembly and construction of the ring truss on the ground;

[0058] Step 4: According to the spatial coordinates of each endpoint and inflection point in the converted CAD 3D model, use angle steel to simulate the relative position of the two adjacent main truss chords on site. According to the size of the intersection of the ring truss chords, cut a section of round tube with the same specifications as the main truss chord and put it on the outside of the angle steel to ensure that the back of the angle steel is at the center of the round tube. The round steel is fixed in the round tube by spot welding so that it can slide on the angle steel. At the same time, the back of the angle steel is always at the center of the round tube; (See Figure 2 : Angle steel on-site processing simulates truss)

[0059] Step 5: According to the distance between the connection node between the ring truss and the main truss and the end of the main truss in the drawing, move the short round tubes on the upper and lower chords of the simulated truss to the corresponding position and fix them with spot welding;

[0060] Step 6: Connect the upper and lower chords of the ring truss with the short round tubes on the simulated truss according to the size of the intersections they open, accurately fix the upper and lower chords of the ring truss according to the node positioning and the designed intersection gap between the round tubes, and then install and weld the webs of the ring truss in sequence. When the weight of the ring truss is large, auxiliary supports should be set up to prevent the angle steel simulated truss from deforming. After assembly in place, welders should be arranged to weld the chord webs of the ring truss as a whole.

[0061] Step 7: After the ring truss is assembled and welded on the ground, it is removed from the simulated truss and then hoisted onto the main structure as a whole.

[0062] The design method of the irregular arc-shaped tube truss chord-web member assembly device comprises the following steps:

[0063] Step a: deepen the steel structure model according to the design drawing, and obtain the parameters for processing the whole main truss and bending the ring truss chord web parts and CNC cutting of the intersection according to the deepened model;

[0064] Step b: After the main truss is hoisted in place, the spatial coordinates of each end point and inflection point of the main truss at the construction site are measured and obtained;

[0065] Step c, input the coordinates obtained by actual measurement into the CAD three-dimensional model, and then convert the CAD three-dimensional basic coordinate system so that the lower chord of the main truss is close to the position parallel to the ground;

[0066] Step d, according to the spatial coordinates of each endpoint and inflection point in the converted CAD three-dimensional model, determine the relative positions of the two adjacent main truss chords for on-site simulation, and determine the on-site installation materials and installation parameters of the simulated truss according to the size of the intersection of the ring truss chords;

[0067] Step e: Determine the fixed positions of the upper and lower chords of the simulated truss according to the distance between the connection node between the ring truss and the main truss and the end of the main truss in the drawing;

[0068] Step f, determining the intersecting connection position with the simulated truss according to the size of the intersecting openings of the upper and lower chords of the ring truss, and determining the fixing positions of the upper and lower chords of the ring truss and the connection position with the web of the ring truss according to the node positioning and the designed intersecting gap between the circular tubes;

[0069] Step g: Output the design drawings based on all the determined parameters.

[0070] In step d, angle steel is used to simulate the relative position of two adjacent main truss chords. A round tube is set on the outside of the angle steel, and the back of the angle steel is kept at the center of the round tube. Round steel that can slide on the angle steel is spot welded inside the round tube to ensure that the back of the angle steel is always in the center of the round tube.

[0071] In step g, according to all the determined parameters, the process of assembling the ring truss on the ground as a whole and then removing it from the simulated truss is pre-simulated, and then the design drawings are output.

[0072] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.

[0073] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0074] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0075] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0076] This solution is not limited to the above-mentioned specific implementation methods, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of this solution without departing from the scope of the technical solution of this solution, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essential content of this solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of this solution without departing from the content of the technical solution of this solution still falls within the scope of protection of the technical solution of this solution.

Claims

1. A method for assembling and positioning an irregular arc-shaped tube truss chord-web member, characterized in that: The steps include: Step 1: Build the design model, process and manufacture the main truss, cut the intersections of the ring truss chord web parts, bend the pipes, and transport them to the construction site; Step 2: Mark the relative coordinates of the ends of the upper and lower chords of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords; Step 3: According to the coordinate points in the model, simulate the positions of the chords of two adjacent main trusses on site to make a simulated truss; Step 4: According to the distance between the ring truss and the end in the drawing, spot weld the upper and lower chords on the simulated truss; Step 5: The upper and lower chords of the ring truss find the installation angles that match the simulated truss according to their intersections, and then spot weld and fix them and install the corresponding webs; Step 6: After the overall welding of the ring truss chord web is completed, it is removed from the simulated truss and hoisted onto the main structure as a whole.

2. The method for assembling and positioning the chord-web members of an irregular arc-shaped tube truss according to claim 1 is characterized in that: In step 3, the specific process of making the simulated truss is as follows: According to the size of the intersection, cut a section of round tube of the same specification and put it on the outside of the angle steel. The round steel is fixed by spot welding inside the round tube so that it can slide on the angle steel. At the same time, the back of the angle steel is always in the center of the round tube.

3. The method for assembling and positioning the chord-web members of an irregular arc-shaped tube truss according to claim 2 is characterized in that: Move the round tubes on the upper and lower chords of the simulated truss to the corresponding positions and fix them by spot welding.

4. The method for assembling and positioning the chord-web members of an irregular arc-shaped tube truss according to claim 1 is characterized in that: In step 5, when the deadweight of the ring truss is greater than the set threshold, auxiliary supports are provided, and the chord web members of the ring truss are integrally welded after being assembled in place.

5. Irregular arc tube truss chord web assembly device model, characterized by: It includes simulating trusses, positioning the simulating trusses in relative space according to the main trusses, and then installing the ring truss chord web members between the simulating trusses; The simulated truss includes a section of round tube, which is sleeved on the outside of the angle steel, and the back of the angle steel is at the center of the round tube. One end of the round steel is fixed by spot welding inside the round tube so that the other end can slide on the angle steel, and the back of the angle steel is always at the center of the round tube. The upper and lower chords of the ring truss are installed in accordance with their intersections and matched with the simulated truss, fixed with spot welding, and the corresponding web members are installed.

6. The irregular arc tube truss chord-web member assembly device model according to claim 5 is characterized in that: Mark the relative coordinates of the centers of the upper and lower chord ends of the main truss in the model, as well as the coordinates of the inflection points of the broken line chords.

7. The irregular arc tube truss chord-web member assembly device model according to claim 5 is characterized in that: The spatial coordinates of each end point and inflection point of the main truss are determined through actual measurement. The measured points are placed in the CAD three-dimensional space system and then converted into the three-dimensional basic coordinate system so that the lower chord of the main truss is placed parallel to the ground.

8. A design method for assembling an irregular arc-shaped tube truss chord-web member, characterized in that: The steps include: Step a: deepen the steel structure model according to the design drawing, and obtain the parameters for processing the whole main truss and bending the ring truss chord web parts and CNC cutting of the intersection according to the deepened model; Step b: After the main truss is hoisted in place, the spatial coordinates of each end point and inflection point of the main truss at the construction site are measured and obtained; Step c, input the coordinates obtained by actual measurement into the CAD three-dimensional model, and then convert the CAD three-dimensional basic coordinate system so that the lower chord of the main truss is close to the position parallel to the ground; Step d, according to the spatial coordinates of each endpoint and inflection point in the converted CAD three-dimensional model, determine the relative positions of the two adjacent main truss chords for on-site simulation, and according to the size of the intersection of the ring truss chords, determine the on-site installation materials and installation parameters of the simulated truss; Step e: Determine the fixed positions of the upper and lower chords of the simulated truss according to the distance between the connection node between the ring truss and the main truss and the end of the main truss in the drawing; Step f, determining the intersecting connection position with the simulated truss according to the size of the intersecting openings of the upper and lower chords of the ring truss, and determining the fixing positions of the upper and lower chords of the ring truss and the connection position with the web of the ring truss according to the node positioning and the designed intersecting gap between the circular tubes; Step g: Output the design drawings based on all the determined parameters.

9. The design method of the irregular arc tube truss chord-web member assembly device according to claim 8, characterized in that: In step d, angle steel is used to simulate the relative position of two adjacent main truss chords. A round tube is set on the outside of the angle steel, and the back of the angle steel is kept at the center of the round tube. Round steel that can slide on the angle steel is spot welded inside the round tube to ensure that the back of the angle steel is always in the center of the round tube.

10. The design method of the irregular arc tube truss chord-web member assembly device according to claim 9, characterized in that: In step g, according to all the determined parameters, the process of assembling the ring truss on the ground as a whole and then removing it from the simulated truss is pre-simulated, and then the design drawings are output.

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