Design method of tunnel arch-shaped cantilever device

Abstract

The invention discloses a tunnel arch cantilever device design method which comprises the following steps: S1, acquiring tunnel section parameters, and drawing a tunnel section graph according to the section parameters by calling a command in cartographic software through a program; s2, inserting an insulator module, a positioner module and a carrier cable seat module into the tunnel section graph for positioning according to line parameters; s3, calling a command in cartographic software by a program to draw an arch tube structure diagram; and S4, calling a drawing software command by a program to obtain parameters of the drawn arch tube structure diagram, and outputting parameters at least comprising the length of the horizontal section, the length of the inclined section and an included angle between the horizontal section and the inclined section. By the adoption of the method, the design efficiency and accuracy of the arch cantilever device can be improved, and further machining of the arch pipe in site construction is reduced.

Description

Technical Field

[0001] The present invention relates to the field of electrified rail transportation, and in particular to a design method for a bow-shaped cantilever device in a tunnel. Background Art

[0002] In tunnels of low-speed electrified railways, bow-shaped cantilever devices are commonly used to install load-bearing cables and contact wires. The base, insulators, load-bearing cable seats, positioners, positioning wire clamps and other components in the bow-shaped cantilever devices have various structures and specifications. Existing specifications and structural forms can be selected according to needs. However, the bow tube needs to be further designed and determined according to the installation environment and selected components. The angle between the inclined section and the horizontal section of the bow tube is easy to determine, but the length of the horizontal section and the inclined section is difficult to design accurately and needs to be further adjusted during on-site installation. Cutting operations are often performed to ensure installation technical requirements, which seriously affects construction efficiency. Summary of the Invention

[0003] In order to solve the shortcomings of the existing technology and improve the design efficiency and accuracy of the tunnel bow cantilever device, the technical solution adopted by the present invention is:

[0004] A design method for a tunnel bow-shaped cantilever device.

[0005] S1. Obtain tunnel section parameters, and draw tunnel section graphics based on the section parameters by calling commands in the drawing software through the program;

[0006] S2. Insert the insulator module, positioner module, and load-bearing cable seat module into the tunnel cross-section diagram for positioning according to the line parameters;

[0007] S3, the program calls the command in the drawing software to draw the arch tube structure diagram;

[0008] S4. The program calls the drawing software command to obtain the parameters of the drawn arcuate tube structure diagram and outputs parameters including at least the length of the horizontal section, the length of the inclined section, and the angle between the horizontal section and the inclined section.

[0009] Furthermore, S5, the parameters of the bow tube, insulator module, positioner module, and load-bearing cable seat module are exported in a table format, and the tunnel bow arm device drawing is saved separately.

[0010] Furthermore, in step S3, the inclined section and horizontal section contour extension lines of the arch tube are drawn in the locator module and the load-bearing cable module respectively, and the program calls the command in the drawing software to delete the redundant line segments outside the intersection of the inclined section extension line of the arch tube and the horizontal section contour extension line to obtain the arch tube structure diagram.

[0011] Furthermore, in step S3, the program calls the command in the drawing software to execute line segment extension, and draws the contour extension lines of the inclined segment and the horizontal segment of the arch tube respectively. The program calls the command in the drawing software to delete the redundant line segments outside the intersection of the inclined segment extension line and the horizontal segment contour extension line of the arch tube to obtain the arch tube structure diagram.

[0012] Furthermore, the line parameters include pull-out value, conductor height, structural height, installation height of the row of holes under the base, and insulator model.

[0013] Furthermore, the tunnel section parameters are obtained by scanning the tunnel with a tunnel profiler.

[0014] Furthermore, the insulator module, the load-bearing cable seat module and the positioner module are drawn in advance by drawing software and stored as graphic files that can be inserted into the drawing software. When executed, the program calls the graphic files that meet the requirements.

[0015] Furthermore, the insulator module includes a base, an insulator, and a locator. When drawing the base, positioning points of the lower mounting hole and the upper mounting hole are inserted; when drawing the locator, a reference point based on the center of the contact line is inserted; when drawing the load-bearing cable seat, a center point based on the center of the load-bearing cable is inserted.

[0016] Furthermore, the insulator module obtains the installation position and model based on the installation height parameters of the lower row holes of the base and the spacing between the lower row holes, and the insulator module is inserted by aligning the lower row hole positioning points with the height position coordinates of the upper and lower row holes on the tunnel section.

[0017] Furthermore, the locator module realizes locator insertion by combining the contact line reference point with the pull-out value and the guide height positioning.

[0018] Furthermore, the insertion of the load-bearing cable seat is achieved by positioning the center point of the load-bearing cable in combination with the horizontal coordinates of the contact line and the height of the structure.

[0019] The above method can be used to locate the main modules of the bow-shaped cantilever device in the cross-sectional drawing based on the tunnel cross-sectional surveying data and the line parameters by calling the drawing software command, and then call the drawing software command to draw the bow tube structure, so as to obtain the design parameters of the bow-shaped cantilever device, thereby improving the design efficiency and accuracy of the bow-shaped cantilever device and reducing the further processing of the bow tube during on-site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the base structure drawn;

[0021] Figure 2 The schematic diagram of the insulator structure is drawn;

[0022] Figure 3 Schematic diagram of the positioning ring structure drawn;

[0023] Figure 4 The figure is a schematic diagram of the insulator module structure obtained by assembling the base, insulator and positioning ring;

[0024] Figure 5 This is a schematic diagram of the structural structure of the cable support module;

[0025] Figure 6 The schematic diagram of the locator module structure is drawn;

[0026] Figure 7 Insert the schematic diagram of the insulator module into the tunnel cross-section;

[0027] Figure 8 For Figure 7 Schematic diagram of inserting the locator module and the load-bearing cable seat module into the foundation;

[0028] Figure 9 For Figure 8 Draw a schematic diagram of the arch tube based on this. DETAILED DESCRIPTION

[0029] In order to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0030] The solution is automatically completed through a software program, such as using a programming program such as VB to create the software, and the software program calls commands in a drawing software (such as CAD software) to implement the method.

[0031] First, the basic graphic files required for software execution are explained: these basic graphic files are used to be called and inserted into the drawing software when the program is executed.

[0032] Firstly, the required combination module is drawn by drawing software, such as CAD software. The combination module is composed of at least three groups of combination modules, namely: insulator module, load-bearing cable seat module and positioner module.

[0033] like Figure 4 The insulator module shown is composed of at least a base, an insulator and a positioning ring. The relative positions of the parts constituting the module are fixed. Taking the common structural form in the existing line as an example, the following are drawn respectively: Figure 1-3 The parts drawings of the base, insulator and locating ring are shown. Since the specifications of the base, insulator and locating ring may be different in actual selection, the above parts of different specifications and structural forms are drawn in consideration of covering as many specifications and structural forms as possible that may be used in existing lines. The above parts of different specifications are combined and assembled to obtain several insulator module graphic files.

[0034] Regarding the production of the above-mentioned insulator module graphic files, here we will further explain the more common structures and specifications in combination with the accompanying drawings. The following parts are drawn using CAD software at a 1:1 ratio.

[0035] like Figure 1 As shown, the base: different specifications of bases are drawn according to different angles (α) between the mounting surface (1) and the mounting pin (2). The angle (α) is usually within the range of 20° to 40°, and a base part is drawn at intervals of 0.5°. According to the embodiment here, 41 specifications of bases can be drawn.

[0036] like Figure 2 As shown, taking the commonly used specifications as an example, insulators with length L of 850±10mm and 835±10mm can be drawn.

[0037] like Figure 3 As shown, the locating ring is drawn using the more common clamp-type locating ring.

[0038] Assemble the parts drawn above to obtain Figure 4 In the insulator module shown, the insulator sleeve is assembled with the base pin so that the inner edges of the two ears of the long pin are 1 mm away from the upper and lower edges of the insulator sleeve. Next, a locating ring is assembled to the end of the insulator. In existing bow-shaped arm structures, the distance between the locating ring and the insulator end face is generally 50 mm, 70 mm, 100 mm, and 200 mm. During assembly, the above four locating ring positions are also assembled separately, and finally, 246 insulator module graphic files are obtained: base 41 × insulator 2 × locating ring 4 = 246 types. These 246 insulator module graphic files are named and stored separately. For convenience, they can be named according to the base angle, insulator specification, and locating ring distance. For example, 21°-835-70 means a base angle of 21°, an insulator specification of 835, and a locating ring distance of 70 from the insulator end face, and so on.

[0039] In order to facilitate the assembly of various parts in the insulator module and the subsequent positioning and installation of the insulator module in the tunnel cross-section graphics, when drawing the base, insulator, and positioning ring, insert positioning points in each part drawing. For example, insert two positioning points in the base, namely the lower mounting point (x1, y1) and the upper mounting point (x2, y2).

[0040] Three points are inserted into the insulator, namely the first end face point (x3, y3), the second end face point (x4, y4), and the center point of the bottom end of the insulator sleeve (x5, y5).

[0041] Two points are inserted into the positioning ring, namely the first assembly point (x6, y6) and the second assembly point (x7, y7). These two assembly points are set at corresponding distances extending from the end points of the inner wall of the positioning ring's hoop. The corresponding distances mentioned here refer to the distance between the end face of the positioning ring's hoop and the end face of the insulator sleeve, that is, the distances required for the assembly of the aforementioned positioning ring are 50mm, 70mm, 100mm, and 200mm, respectively.

[0042] After the above points are inserted into the parts, during assembly, the axis of the insulator sleeve (3) is aligned with the axis of the base mounting pin (2), and the first assembly point and the second assembly point of the positioning ring are aligned with the first end face point and the second end face point of the insulator respectively.

[0043] The above is only a specific embodiment given to illustrate how to assemble, and is not limited to the above assembly method for assembling parts in the insulator module. However, the mounting points on the base need to be inserted in advance to ensure that the subsequent insulator module is positioned during the cooperation with the tunnel section. In order to facilitate subsequent positioning in the tunnel section, the lower mounting point and the upper mounting point on the base are preferably set at the center position of the mounting hole in the plane where the base and the tunnel wall cooperate.

[0044] The production of the graphic file of the load-bearing cable seat module is further explained here with reference to the accompanying drawings using more common structures and specifications. The following parts are drawn using CAD software at a 1:1 ratio.

[0045] like Figure 5 In addition to drawing the structure of the load-bearing cable seat (4), the pipe cap (5) end structure of the horizontal section of the arched tube is drawn on the load-bearing cable seat according to the extension distance L2 of the pipe cap of the arched tube. It is also necessary to insert the center point (x8, y8) of the load-bearing cable into it to facilitate the subsequent positioning of the height of the load-bearing cable seat.

[0046] The production of the locator module graphic file is further explained here with reference to the accompanying drawings using more common structures and specifications. The following parts are drawn using CAD software at a 1:1 ratio.

[0047] like Figure 6 As shown, when drawing the locator (6), the locator contact line clamp is drawn together, and a reference point (x9, y9) is inserted at the center of the contact line. In this embodiment, the locator is used to draw locators of different specifications using a common locator. The locator specifications referred to here include the locator length and the slope of the locator with the reference point as the origin.

[0048] After completing the above basic documents, the following is a further detailed description of the method for implementing the bow-shaped cantilever device structure design:

[0049] First, a tunnel section meter is used to scan the tunnel section and collect section data. When scanning the tunnel section, only the tunnel section where the bow-shaped arm device needs to be installed is scanned. Since there are many installation positions of the bow-shaped arm device in the tunnel, in order to facilitate scanning, the tunnel section meter can be installed on a rail car and move along the track for unified scanning.

[0050] The scanned cross-sectional data is then imported into the software. Since the tunnel cross-section obtained is multiple sets of cross-sectional data, the cross-sectional data at a certain location is used as an example to illustrate how to implement the design of the bow-shaped cantilever device through software.

[0051] Import the cross-section data of a certain place into the software and input the line parameters in the software. The line parameters include: pull-out value, guide height, structure height, installation height of the row holes under the base, insulator specifications, and the distance from the positioning ring to the insulator end face. After running the program, the program calls the drawing software command to draw the following figure according to the cross-section data: Figure 7 The 1:1 tunnel cross-section diagram (8) is shown.

[0052] Then, the insulator modules, positioner modules, and catenary modules of the selected specifications are respectively inserted into the corresponding positions of the tunnel cross-section diagram. The specific selection of specifications and the insertion method are further explained here with an embodiment.

[0053] by Figure 7 For example, if the height H of the installation point of the lower row of holes of the base is 5600, the software code is used to quickly find the imported data table. If there is no 5600, the number with the smallest difference between 5595-5600 or 5600-5605 and 5600 is used to determine the Y coordinate first, such as 5601. The software code is used to quickly identify the X coordinate and temporarily determine the identified X coordinate X sd1， Then take the insertion point (X sd1, ,5601) as the positioning point, with the positioning point as the center of the circle and a radius R of 270 (the 270 is the distance between the upper installation point and the lower installation point) to obtain another intersection point (X sd2, ,Y sd2 ), then the angle β=arctan(X sd1- X sd2 ) / (Y sd1- Y sd2 ) to determine the required base angle.

[0054] The line parameters include the insulator specifications and the distance from the locating ring to the insulator end face as input values.

[0055] Therefore, through the above parameter specification program, it is possible to select the appropriate insulator module and insert it into the tunnel cross-section. When inserting, align the lower and upper mounting points with the (X sd1,,5601),(X sd2, ,Y sd2 ) can be overlapped.

[0056] The above process ultimately achieves the desired goal of determining the base installation position and ensuring that the positioning pin is perpendicular to the horizontal plane. This can also be considered as maintaining the insulator at a specific position and angle within the tunnel cross-section. It can be seen that although a specific implementation method is provided in the embodiment to achieve the above goal, in practice, other processing processes can also be used to complete the selection and positioning of the insulator module, ultimately achieving the positioning and selection of the insulator module.

[0057] After positioning the above-mentioned insulator module in the tunnel cross-section diagram, the locator module is inserted and assembled with the inserted insulator module to ensure that the positioning clamp is accurately positioned.

[0058] The specific implementation method for selecting and inserting the locator is described here with an example:

[0059] like Figure 8 As shown, first according to the pull-out value (the pull-out value is the distance L3 between the contact line and the pantograph center), the conductor height ( Figure 7 The upper surface of the rail shown in FIG9 is used to determine the center H1 of the contact line. For example, the horizontal coordinate of the line center is determined based on the data measured by the tunnel section instrument. The vertical coordinate is the reference point obtained by the guide height. The relationship between the contact line clamp suspension point and the reference point is: the reference point horizontal coordinate - the suspension point horizontal coordinate = the pull-out value (usually 200, 50, 100, -50). The horizontal coordinate of the suspension point is calculated, and the vertical coordinate calculated by the guide height is combined to obtain the suspension point coordinate. The position of the locator is selected based on the coordinate position of the suspension point and the position of the locator installed on the locating ring. Specifications and angles, so through this embodiment, when drawing the positioning ring, it is also necessary to insert a hanging point (x10, y10) at the center of the lifting ring where the positioning ring is installed, and then calculate the length of the positioning ring according to the distance between the hanging points, and select the slope of the positioning ring according to the angle relationship between the line between the hanging points and the horizontal (when drawing the positioning ring, in addition to drawing positioning rings of different lengths and specifications, positioning rings of different specifications and different slopes are drawn separately according to the different installation slopes of positioning rings in the usual lines). For example, using the coordinates displayed by the CAD system and the calculated coordinates, use If the distance is 800-809, use a 800-length locator (including wire clamp). If the distance is 1013-1017, use a 1010-length locator.

[0060] According to the formula:

[0061] Slope angle = arctan (horizontal coordinate of the suspension point - x10) / (vertical coordinate of the suspension point - y10), calculate the slope angle of the locator, comprehensive length and slope angle, for example, length 800, slope angle 3°, and then call the locator module file to select the appropriate locator and insert it into the drawing. Align the contact line center reference point (x9, y9) in the locator with the suspension point to complete the assembly of the locator module and the insulator module.

[0062] The main purpose of the above process is to achieve the position positioning of the contact wire clamp. It can be seen that although a specific implementation method is given in the embodiment to achieve this purpose, other conventional calculation and processing processes can also be used in actual software to complete the selection and positioning of the locator, and the ultimate goal is to achieve the selection and positioning of the locator module.

[0063] After completing the insertion of the locator, insert the load-bearing cable seat module into the drawing to determine the installation position of the load-bearing cable.

[0064] The specific implementation method for inserting the load-bearing cable module is described here with an example:

[0065] The setting point for the cable support module is determined based on the structure height (the vertical distance H2 between the cable and the contact line) and the suspension point coordinates obtained above. The setting point coordinates are calculated as (suspension point horizontal coordinate, suspension point vertical coordinate + H2). The cable support module is called, and the center point (x8, y8) in the cable support module is positioned at the setting point coordinates, completing the positioning of the cable support. When drawing the cable support module, it was mentioned that the cap of the arch tube is also drawn in the cable support module, and the cap extends beyond the cable support by 200. Of course, other extension lengths may be required. Therefore, when drawing the cable support module, all cap lengths should be considered as much as possible, and various cable support module specifications should be drawn. When using multiple cable support module specifications, the corresponding cable support parameters (i.e., the cap extension length) must be entered in the software line input interface to select the cable support specification. If only one specification is available, setting the cable support parameters is not required.

[0066] After all the above modules are assembled in place, the program draws the arch tube structure diagram in the drawing software. The specific implementation method is explained here with an example:

[0067] Here are two implementation methods:

[0068] Method 1: When drawing the insulator and load-bearing cable seat modules, the extension lines of the inclined section contour line of the arch tube that matches the insulator sleeve are drawn, and the extension lines of the straight section contour line of the arch tube that matches the load-bearing cable seat are drawn. After assembling each module in the tunnel section, the inclined section contour line and the straight section contour line segment must intersect. The program calls the trimming command in the drawing software to obtain the arch tube structure by extending the redundant line segments outside the intersection.

[0069] Combine Figure 9 To explain this method, when drawing the insulator, the contour lines S1, S2 and the center line S6 of the inclined section of the arch tube are drawn and extended to a sufficient length. Similarly, when drawing the load-bearing cable seat, the contour lines S3, S4 and the center line S6 of the horizontal section of the arch tube are drawn. When the above-mentioned insulator module and the load-bearing cable seat module are assembled, the contour lines and the center lines of each horizontal section and inclined section intersect. The program calls the trimming command of the drawing software to delete the outer extension lines of the intersection of S1 and S4, S2 and S3, and S5 and S6 respectively, and the intersections of S1 and S4, S2 and S3 are rounded to obtain the arch tube structure diagram. By calling the marking command of the drawing software, the length L3 of the inclined segment is obtained through the coordinates of the center point (x5, y5) of the bottom end of the insulator sleeve and the coordinates of the intersection of S5 and S6, the length L4 of the horizontal segment is obtained through the coordinates of the end point of S5 and the coordinates of the intersection of S5 and S6, and the angle γ of the horizontal segment and the inclined segment is obtained through the line segments S5 and S6, thereby obtaining the key parameters of the arch tube.

[0070] Method 2: After assembling each module in the tunnel section, the program calls the straight line or extension command of the drawing software to extend the insulator sleeve to the contour line of the inclined section of the arch tube, and to extend the straight section contour line of the arch tube in the load-bearing cable seat module. After the two sets of contour lines intersect, the arch tube structure is obtained.

[0071] Combine Figure 9 To explain this method, call the line command of the drawing software and draw the inclined segment contour extension lines S2 and S3 with the inserted points (x4, y4) and (x11, y11), (x3, y3) and (x12, y12) respectively. Here, the points (x11, y11) and (x12, y12) are explained. If you need to draw the arch tube contour by calling the line drawing command, then when drawing Figure 3 For the positioning ring shown, two points (x11, y11) and (x12, y12) can be inserted at the other end of the inner wall of the clamp to facilitate the subsequent determination of the straight line extension direction through the two points. Calling the Extend command will extend the contour lines S3 and S4 drawn on the pipe cap to draw the horizontal segment contour extension line, make the contour lines intersect or execute the Trim command, and finally call the Dimension command to obtain the parameters.

[0072] Of course, the above two methods can be combined to realize the drawing of the arch tube, that is, the contour lines of the inclined segment and the horizontal segment can be drawn in advance, and the other one can be drawn by the program in the drawing software by extending or drawing a straight line to obtain the arch tube structure.

[0073] The above method will obtain and output the required arch tube parameters. These typically include the inclined section length, horizontal section length, and the angle between the inclined and horizontal sections. Specifications of other components can also be output. The final result can be presented in Excel format, facilitating subsequent technical personnel's reference for model selection, material cutting, and fabrication. The resulting tunnel arch cantilever assembly drawing can also be saved for easy review and export.

[0074] The embodiments described above are not the only ones of the present invention. From the perspective of the present invention's technical solution, key steps include determining the base position, insulator angle, and load-bearing cable seat positions, enabling the drawing and parameter reading of the arch tube in mapping software via a program. As for how to achieve positioning and selection in specific embodiments, those skilled in the art can choose different methods through conventional means, and such adaptability does not exceed the overall inventive concept of the present invention.

Claims

1. A method for designing a tunnel arched cantilever device, characterized by: S1. Obtain tunnel section parameters, and draw tunnel section graphics based on the section parameters by calling commands in the drawing software through the program; S2. Insert the insulator module, positioner module, and load-bearing cable seat module into the tunnel cross-section diagram for positioning according to the line parameters; S3, the program calls the command in the drawing software to draw the arch tube structure diagram; S4. The program calls the drawing software command to obtain the parameters of the drawn arcuate tube structure diagram and outputs parameters including at least the length of the horizontal section, the length of the inclined section, and the angle between the horizontal section and the inclined section.

2. A method for designing a tunnel arched cantilever device according to claim 1, characterized in that: S5. Export the parameters of the arch tube, insulator module, positioner module, and load-bearing cable seat module in a table format, and save the tunnel arch cantilever device drawing separately.

3. A method for designing a tunnel arched cantilever device according to claim 1, characterized in that: In step S3, the inclined segment and horizontal segment contour extension lines of the bow-shaped arm are drawn in the locator module and the load-bearing cable module respectively, and the program calls the command in the drawing software to delete the redundant line segments outside the intersection of the inclined segment extension line and the horizontal segment contour extension line of the bow-shaped arm to obtain the bow-shaped arm structure diagram.

4. A method for designing a tunnel arched cantilever device according to claim 1, characterized in that: In step S3, the program calls the command in the drawing software to execute line segment extension, and draws the inclined segment and horizontal segment contour extension lines of the bow-shaped wrist arm respectively. The program calls the command in the drawing software to delete the redundant line segments outside the intersection of the inclined segment extension line and the horizontal segment contour extension line of the bow-shaped wrist arm to obtain the bow-shaped wrist arm structure diagram.

5. The method for designing an arched cantilever device for an arched cantilever tunnel according to claim 1, characterized in that: The line parameters include pull-out value, conductor height, structural height, installation height of the row of holes under the base, and insulator model.

6. The method for designing an arched cantilever device for an arched cantilever tunnel according to claim 1, characterized in that: The tunnel section parameters are obtained by scanning the tunnel with a tunnel section instrument.

7. A method for designing a tunnel arched cantilever device according to claim 5, characterized in that: The insulator module, the load-bearing cable seat module and the positioner module are drawn in advance by drawing software and stored as graphic files that can be inserted into the drawing software. When executing, the program calls the graphic files that meet the requirements.

8. The method for designing a tunnel arched cantilever device according to claim 7, characterized in that: The insulator module includes a base, an insulator, and a locator. When drawing the base, positioning points of the lower mounting hole and the upper mounting hole are inserted; when drawing the locator, a reference point based on the center of the contact line is inserted; when drawing the load-bearing cable seat, a center point based on the center of the load-bearing cable is inserted.

9. The method for designing a tunnel arched cantilever device according to claim 8, characterized in that: The insulator module obtains the installation position and model according to the installation height parameters of the lower row holes of the base and the spacing between the lower row holes, and the insulator module is inserted by aligning the lower row hole positioning point with the height position coordinates of the upper and lower row holes on the tunnel section.

10. The method for designing an arched cantilever device for an arched cantilever tunnel according to claim 8, characterized in that: The positioner module is inserted by combining the contact line reference point with the pull-out value and the guide height positioning.

11. The method for designing an arched cantilever device for an arched cantilever tunnel according to claim 8, characterized in that: The described load-bearing cable seat is inserted by positioning the center point of the load-bearing cable in combination with the horizontal coordinate of the contact line and the height of the structure.

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