JP2013054448A - Pipeline design system and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipeline design system capable of easily designing a pipeline buried along the ground surface, and a program.SOLUTION: Arithmetic means 3 comprises a pipeline arithmetic means 34 for calculating the position of a pipeline in a longitudinal section on the basis of position information of the ground surface in the longitudinal section such that the pipeline is disposed along the surface so as to be lower than the surface by a set distance or more. The pipeline arithmetic means 34 includes: a reference position calculation part 341 for calculating a position which is lower than the surface by the set distance and is parallel to the surface, as the reference position of the pipeline; a pipe straight position calculation part 343 for calculating the position of a pipe straight part in the longitudinal section that is disposed according to the reference position of the pipeline; and a pipe curve position calculation part 344 for calculating the position of a pipe curved part in the arcuate longitudinal section for connecting the pipe straight parts.

Description

  The present invention relates to a pipeline design system for designing a pipeline buried in the ground, and also relates to a computer-readable program.

  Conventionally, as a pipeline design system, a pipeline embedded in the ground is designed by including a storage means for storing predetermined information and a calculation means for calculating the stored information to design the pipeline. A pipeline design system is known (for example, Patent Document 1). According to such a pipeline design system, a plan view or a longitudinal sectional view can be drawn.

JP 2000-1113014 A

  By the way, according to the pipeline design system according to Patent Document 1, in order to design a pipeline, it is necessary to input various pipeline information. Therefore, in such a pipeline design system, a complicated operation is required to design a pipeline embedded along the ground surface, and a lot of time is required.

  Therefore, in view of such circumstances, an object of the present invention is to provide a pipeline design system and program capable of easily designing a pipeline buried along the ground surface.

  The pipeline design system according to the present invention includes a storage unit that stores predetermined information and a calculation unit that calculates the stored information and designs the pipeline in order to design a pipeline embedded in the ground. In the pipeline design system provided, the storage means includes ground surface storage means for storing position information of the ground surface in the longitudinal section, and the computing means is based on the position information of the ground surface in the longitudinal section, and the pipeline is more than a set distance from the ground surface. It is provided with pipe calculation means for calculating the position of the pipe line in the longitudinal section so as to be low and arranged along the ground surface, and the pipe line calculation means has a position lower than the ground surface by a set distance and parallel to the ground surface. A reference position calculation unit that calculates the reference position of the pipe line, a pipe straight line position calculation unit that calculates the position of the pipe straight line part in a longitudinal section arranged according to the reference position of the pipe line, and the pipe straight line parts are connected to each other. Pipe curve in longitudinal section Characterized in that it comprises a tube curved position calculating unit for calculating the position.

  According to the pipeline design system according to the present invention, the ground surface storage means stores the position information of the ground surface in the longitudinal section, and the reference position calculation unit of the pipeline calculation means is at a position lower than the ground surface by a set distance and the ground surface. Is calculated as a reference position of the pipeline. In the pipe calculation means, the pipe straight line position calculation unit calculates the position of the pipe straight line part in the longitudinal section arranged according to the reference position of the pipe, and the pipe curve position calculation unit The position of the tube curve portion in the longitudinal section connecting the two is calculated.

  In this way, the pipe line calculating means calculates the position of the pipe line in the vertical cross section based on the position information of the ground surface in the vertical cross section. Can be designed. Therefore, it is possible to easily design a pipe line buried along the ground surface.

  In the pipeline design system according to the present invention, the pipeline calculation means further includes a division calculation unit that divides the reference position of the pipeline into a plurality of sections, and the pipe straight line position calculation unit is provided for each divided section. The pipe straight line portion in the longitudinal section is calculated so that the pipe straight line portion is arranged according to the reference position of the pipe line, and the pipe curve position calculating unit is arranged so that the pipe curve portion is arranged at the boundary of the section. In addition, the position of the tube curve portion in the longitudinal section may be calculated.

  According to such a pipeline design system, the division calculation unit divides the reference position of the pipeline into a plurality of sections. Then, the tube straight line position calculation unit calculates the position of the tube straight line part in the longitudinal section, and the tube curve position calculation unit calculates the position of the tube curve part in the longitudinal section, so that the pipe line position is calculated for each divided section. It is possible to design a pipe line in which the straight pipe portion is arranged according to the reference position and the curved pipe portion is arranged at the boundary of the section.

  Further, in the pipeline design system according to the present invention, the pipe curve position calculation unit has the largest bending radius among the plurality of pipe curve parts when a plurality of pipe curve parts having different bending radii can be arranged. You may calculate so that a big pipe curve part may be arrange | positioned.

  According to such a pipeline design system, when a plurality of tube curve portions having different bending radii can be arranged by the calculation of the tube curve position calculation unit, the bending radius is the same among the plurality of tube curve portions. It is possible to design a pipe line in which the largest pipe curve part is arranged. Thereby, the change of the position of the pipe line in a longitudinal section can be designed gently.

  Further, in the pipeline design system according to the present invention, the storage means includes pipeline storage means for storing the position information of the pipeline in the plane, and the ground surface storage means further stores the position information of the ground surface in three dimensions. The calculation means may include ground surface calculation means for calculating the position of the ground surface in a longitudinal section cut at the position of the pipe line based on the position information of the pipe line in the plane and the position information of the ground surface in three dimensions.

  According to such a pipeline design system, the pipeline storage means stores the position information of the pipeline in the plane, and the ground surface storage means stores the position information of the ground surface in three dimensions. Then, based on the position information of the pipeline in the plane and the position information of the ground surface in three dimensions, the ground surface calculation means calculates the position of the ground surface in the longitudinal section cut at the position of the pipeline. Thereby, based on the calculated position of the ground surface in the longitudinal section, it is possible to design a pipeline that is lower than the ground surface by a set distance or more and is arranged along the ground surface.

  Further, the program according to the present invention is a computer-readable program, and includes calculation means for calculating predetermined information and designing a conduit buried in the ground, and the calculation means includes a position of the ground surface in the longitudinal section. Based on the information, it is provided with a pipeline calculating means for calculating the position of the pipeline in the longitudinal section so that the pipeline is arranged along the ground surface at a lower distance than the set distance from the ground surface. A reference position calculation unit that calculates a position that is lower by a set distance and parallel to the ground surface as a reference position of the pipeline, and a pipe that calculates the position of the straight line portion in the longitudinal section arranged according to the reference position of the pipeline It comprises a straight line position calculation unit and a tube curve position calculation unit that calculates the position of the tube curve part in an arcuate vertical section connecting the tube straight line parts.

  As described above, according to the pipeline design system and program according to the present invention, there is an excellent effect that the pipeline embedded along the ground surface can be easily designed.

1 shows an overall configuration diagram of a pipeline design system according to an embodiment of the present invention. FIG. It is a block diagram of the pipe line design system which concerns on the embodiment, Comprising: (a) is a block diagram of an input means, (b) shows the block diagram of a memory | storage means. It is a block diagram of the pipe line design system which concerns on the embodiment, Comprising: (a) is a block diagram of a calculation means, (b) shows the block diagram of an output means. The design flowchart of the pipe line design system which concerns on the embodiment is shown. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) is a pipe section, and (b) shows a top view of a pipe line. The design flowchart of the pipe line design system which concerns on the embodiment is shown. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a) and (b) show the whole longitudinal section of a pipe line. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) is the whole longitudinal section of a pipe, and (b) and (c) show the principal part longitudinal section of a pipe, respectively. . It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) and (b) are the principal part longitudinal cross-sectional views of a pipe line, respectively, and (c) shows the whole pipe longitudinal cross-sectional view. . It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) and (b) are the principal part longitudinal cross-sectional views of a pipe line, respectively, and (c) shows the whole pipe longitudinal cross-sectional view. . It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) and (b) are the principal part longitudinal cross-sectional views of a pipe line, respectively, and (c) shows the whole pipe longitudinal cross-sectional view. . It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) and (b) are the principal part longitudinal cross-sectional views of a pipe line, respectively, and (c) shows the whole pipe longitudinal cross-sectional view. . It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a) and (b) show the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(d) shows the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(d) shows the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(d) shows the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a) and (b) show the whole longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(c) shows the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) is an important section longitudinal section of a pipe, and (b) shows the whole pipe longitudinal section. The design flowchart of the pipe line design system which concerns on the embodiment is shown. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) is the whole longitudinal cross-sectional view of a pipe line, and (b) shows the principal part longitudinal cross-sectional view of a pipe line. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(c) shows the principal part longitudinal section of a pipe line, respectively. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, and (a)-(c) shows the principal part longitudinal section of a pipe line, respectively. It is pipe line design explanatory drawing of the pipe line design system which concerns on the same embodiment, Comprising: The whole longitudinal cross-sectional view of a pipe line is shown. It is pipe line design explanatory drawing of the pipe line design system which concerns on the same embodiment, Comprising: A drawing tension | tensile_strength calculation formula list is shown. It is a pipe line design explanatory view of the pipe line design system concerning the embodiment, (a) shows a side pressure calculation formula list, (b) shows a calculation constant list. It is a pipe line design explanatory view of a pipe line design system concerning other embodiments of the present invention, (a) shows a critical temperature change formula list, and (b) shows a calculation constant list.

  Hereinafter, an embodiment of a pipeline design system according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the pipeline design system according to the present embodiment includes an input unit 1 for inputting predetermined information, a storage unit 2 for storing various information such as input information, and stored information. A calculation means 3 for calculating and designing a pipeline, an output means 4 for outputting various information, and a control means 5 for controlling the means 1, 2, 3, 4 are provided. The pipeline design system is configured to automatically design pipelines that are buried along the ground surface and pipelines that are separated from the buried objects.

  As shown in FIG. 2A, the input means 1 includes a ground surface input means 11 for inputting ground surface information and a buried object input means 12 for inputting buried object information. The input unit 1 includes a pipeline section input unit 13 for inputting pipeline section information, and a pipeline input unit 14 for inputting pipeline information.

  The pipe line input means 14 is a pipe straight line position input part 141 for inputting position information of the pipe straight line part constituting the pipe line, and a pipe curve for inputting position information of an arcuate pipe curve part connecting the pipe straight line parts. A position input unit 142. The pipeline input means 14 includes a start point position input unit 143 that inputs position information of the start point of the pipeline and an end point position input unit 144 that inputs position information of the end point of the pipeline.

  And the pipe line input means 14 is the pipe curve which accept | permits use from the embedding depth input part 145 which inputs the information of the depth (setting distance) which embeds a pipe line, and the pipe curve part which has a some bending radius. A bending radius input unit 146 for inputting the unit. Further, the pipeline input means 14 includes a separation distance input unit 147 that inputs a distance (set distance) at which the pipeline is separated from the embedded object, and a separation direction input unit 148 that inputs a direction in which the pipeline is separated from the embedded object. Is provided.

  As shown in FIG. 2B, the storage means 2 includes a ground surface storage means 21 for storing information on the ground surface, and an embedded object storage means 22 for storing information on the embedded objects. The storage unit 2 includes a pipeline section storage unit 23 for storing pipeline section information and a pipeline storage unit 24 for storing pipeline information.

  The storage means 2 includes a pull-in tension storage means 25 for storing pull-in tension information, which is a tension generated in the electric wire when the electric wire is drawn into the pipe line, and a pipe when the electric wire passes through the pipe curve portion on the plane. And a side pressure storage means 26 for storing information on the side pressure, which is a force pressed against the inside of the curved portion. Further, the storage unit 2 includes an output table storage unit 27 for storing each information to be output to the output table.

  As shown in FIG. 3A, the calculation means 3 includes a ground surface calculation means 31 for calculating the position of the ground surface and a buried object calculation means 32 for calculating the position of the buried object. The calculating means 3 includes a pipe cross section calculating means 33 for calculating the pipe cross section and a pipe calculating means 34 for calculating the position of the pipe. And the calculating means 3 is provided with the drawing tension calculating means 35 which calculates drawing tension, the side pressure calculating means 36 which calculates a side pressure, and the output table calculating means 37 which calculates each information output to an output table.

  The pipeline calculation means 34 includes a reference position calculation unit 341 that calculates a position that is lower than the ground surface by a set distance and parallel to the ground surface as a reference position of the pipeline, and a section that divides the reference position of the pipeline into a plurality of sections. The calculation unit 342, the tube straight line position calculation unit 343 that calculates the position of the pipe straight line portion arranged according to the reference position of the pipe line, and the position of the arcuate tube curve portion that connects the pipe straight line portions to each other are calculated. A tube curve position calculation unit 344. Then, the pipeline calculation means 34 calculates the position of the pipeline in the longitudinal section so that the pipeline is lower than the ground surface by a set distance or more and is arranged along the ground surface.

  Further, the pipe line calculation means 34 is configured to determine whether the pipe line is separated from the embedded object by a set distance or more, and to determine a position that is higher or lower by a set distance from the embedded object as a pipe separation reference. And a separation reference position calculation unit 346 that calculates the position. And the pipe line calculating means 34 calculates the position of the pipe line in the longitudinal section so that the pipe line is separated from the embedded object by a set distance or more.

  As shown in FIG. 3B, the output unit 4 includes a pipeline output unit 41 that outputs pipeline information. The output unit 4 includes a pull-in tension output unit 42 that outputs pull-in tension information and a side pressure output unit 43 that outputs side pressure information. Furthermore, the output unit 4 includes an output table output unit 44 that outputs an output table.

  In the pipeline design system according to the present embodiment, for example, the input unit 1 is configured by a keyboard, a mouse, and the like, and the storage unit 2 is a main storage device (memory) in the computer main body or an external medium ( (Computing medium such as CD, DVD) is composed of an auxiliary storage device or the like, the arithmetic means 3 and the control means 5 are composed of a central processing unit (CPU) in the computer body, and the output means 4 is a display. And a printer. In the pipeline design system according to the present embodiment, a system using three-dimensional CAD is used.

  The configuration of the pipeline design system according to the present embodiment is as described above. Next, a design method of the pipeline design system according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 4, the design method of the pipeline design system includes step 1 (surface design), step 2 (embedded object design), step 3 (pipe cross-section design), step 4 (planar pipeline design), step 5 (longitudinal section pipeline design), step 6 (buried object separation pipeline design), step 7 (retraction tension calculation), step 8 (side pressure calculation), step 9 (pipe design), step 10 (output table calculation) Is provided.

  First, in step 1 (surface design), when, for example, three points of information on the position of the ground surface are input via the ground surface input unit 11, the ground surface calculation unit 31 determines the position of the ground surface (specifically, based on the three ground surface positions). In practical terms, the position of the ground surface is designed by calculating a three-dimensional ground surface). The ground surface storage means 21 stores the calculated position information of the ground surface in three dimensions.

  When proceeding to step 2 (embedded object design), for example, by inputting information such as the shape and position of the buried object via the buried object input means 12, the buried object calculating means 32 calculates the position of the buried object. Design the location of buried objects. And the embedded object storage means 22 memorize | stores the positional information on the embedded object in three dimensions.

  Proceeding to step 3 (pipe cross section design), the pipe cross section input means 13 provides information on each pipe constituting the pipe (specifically, the pipe number, type, size, center position for identifying the pipe) Etc.) and the information (specifically, type, size, etc.) of the electric wires laid on the pipe, the pipe cross section calculating means 33, as shown in FIG. Calculate the cross section.

  The pipe shown in FIG. 5A is a pipe in which one pipe (tube number 1) is arranged in the upper stage and two pipes (tube numbers 2, 3) are arranged in the lower stage. Then, the pipe cross section calculating means 33 calculates a distance B from the pipe axis position A of the pipe inputted through the pipe cross section input means 13 to the upper end of the pipe. The pipe section storage means 23 stores information on the pipe section. The pipe cross section calculating means 33 may be configured to calculate the pipe axis position A of the pipe.

  Proceeding to step 4 (planar pipeline design), for example, by inputting information about the start point and end point of the pipe straight line portion in the plane (XY plane) via the pipe straight line position input unit 141, the pipe straight line position As shown in FIG. 5B, the calculation unit 343 calculates the position (specifically, the tube axis position A1) of the tube straight line portion on the plane. When, for example, information on the bending radius of the tube curve portion is input via the tube curve position input unit 142, the tube curve position calculation unit 344 displays the position of the tube curve portion on the plane (specifically, the tube axis position A2). ) Is calculated.

  In this way, the pipe axis A in the plane of the pipe line constituted by the pipe straight part and the pipe curve part is designed. In FIG. 5B, the point C indicates the start point of the pipe, the point D indicates the end point of the pipe, and the point E is a change point (a connection point between the pipe straight line part and the pipe curve part). The area F shows a section between the tube straight line portion and the tube curve portion. And the pipe line memory | storage means 24 memorize | stores the positional information on the pipe line in a plane.

  As shown in FIG. 6, step 5 (vertical section pipeline design) includes step 51 (surface position calculation), step 52 (pipe reference position calculation), step 53 (section calculation), step 54 (pipe straight line reference position). Calculation), step 55 (pipe curve position calculation), step 56 (pipe straight line position calculation), step 57 (start / end position calculation), and step 58 (pipe section calculation). Each step 51-58 is explained in full detail below.

  When proceeding to step 51 (surface position calculation), the surface calculation means 31 reads the three-dimensional position information of the ground surface stored in the surface storage means 21 in step 1 and the plane stored in the pipe line storage means 4 in step 4. As shown in FIG. 7A, the position G of the ground surface in the longitudinal section cut at the position of the pipe line is calculated based on the position information of the pipe line. And the ground surface memory | storage means 21 memorize | stores the information of the position G of the ground surface in a longitudinal cross section.

  When the process proceeds to step 52 (pipeline reference position calculation), the reference position calculation unit 341 inputs the information of the set distance (position where the pipe is embedded) via the burying position information input unit 145, so that the reference position calculation unit 341 As shown in (b), based on the position G of the ground surface in the longitudinal section, a position that is lower than the ground surface by a set distance and parallel to the ground surface is calculated as the pipeline reference position H. The pipe line storage unit 24 stores the pipe line reference position H.

  When proceeding to step 53 (section calculation), as shown in FIG. 8A, the section calculation unit 342 includes sections (F1, F3, F5, F7, F9) of the tube straight line section and sections of the tube curve section in the plane. Based on (F2, F4, F6, F8), the pipeline reference position H is divided into a plurality of sections F,. Thereafter, the section calculation unit 342 determines whether or not the distance of each section F is within a predetermined range stored in the pipe line storage unit 24 in the section of the straight pipe portion on the plane.

  When the section calculation unit 342 determines that the distance of the section F (for example, F7) is not within the predetermined range, the section F after the section is within the predetermined range as illustrated in FIG. 8B. In order to prevent the distance from becoming smaller than the minimum distance, a sectionable area (the thick line area in FIG. 8B) in the section F (F7) is calculated.

  Thereafter, the section calculation unit 342 is the highest in the sectionable area of the section F (F7) with respect to the section reference line J connecting the start point H1 and the end point H2 of the pipe reference position H in the section F (F7). The position of the pipe reference position H having a large difference is calculated. Then, as shown in FIG. 8C, the section calculation unit 342 converts the section F (F7) into a plurality of sections F, at the position of the pipe reference position H having the largest height difference with respect to the section reference line J. Partition into F (F71, 72).

  Furthermore, as shown in FIG. 9A and FIG. 9B, the partition calculation unit 342 also applies the section F (F71, 72) to each of the sections F, F (F71, 72). It is determined whether or not the distance is within a predetermined range. When the section calculation unit 342 determines that the distance of the section F (for example, F71) is not within the predetermined range, the section F (F71) is further divided into a plurality of sections F and F (F71) based on the section reference line J. , 72).

  In this way, the section calculation means 342 partitions each section F until it is determined that the distances of all the sections F,... Are within a predetermined range. Accordingly, as shown in FIG. 9C, the partition calculation means 342 partitions the pipeline reference position H into a plurality of sections F,... That are distances within a predetermined range. And the pipe line memory | storage means 24 memorize | stores each section F divided.

  When the processing proceeds to step 54 (pipe straight line reference position calculation), the pipe straight line position calculation unit 343 arranges the pipe straight line portion according to the pipe line reference position H as shown in FIGS. 10 (a) and 10 (b). As described above, the straight line connecting the start point and the end point of the pipe reference position H in the section F is calculated as the primary pipe straight line reference position A11. Then, the pipe straight line position calculation unit 343 calculates the primary pipe straight line reference positions A11,... In all the sections F,.

  Thereafter, the pipe straight line position calculation unit 343 determines whether or not the primary pipe straight line reference position A11 is lower than the pipe line reference position H in each section F. Then, as shown in FIG. 11A, the pipe straight line position calculation unit 343 has the same inclination as the primary pipe straight line reference position A11 and the pipe in the section F (for example, F2, F32) determined not to be a low position. A position lower than the road reference position H is calculated as the secondary pipe straight line reference position A12, and in the section F (for example, F31, F33) determined to be a low position, the primary pipe straight line reference position A11 is used as it is. Calculation is performed as the next pipe straight line reference position A12.

  Further, the pipe straight line position calculation unit 343 calculates the pipe calculated in step 3 with respect to the secondary pipe straight line reference position A12 as shown in FIG. 11B so that the pipe straight line reference position indicates the pipe axis position. A position lower by a distance B from the tube axis to the upper end in the road section is calculated as the third tube straight line reference position A13. Then, the tube straight line position calculation unit 343 calculates the tertiary pipe straight line reference positions A13,... In all the sections F,.

  In addition, the pipe straight line position calculation unit 343 determines a point at a lower position among the start point and the end point of the tertiary pipe straight line reference position A13 located on the boundary line of the section F as shown in FIG. Then, as shown in FIG. 12 (b), a straight line connecting the points at low positions is calculated as the fourth-pipe straight line reference position A14,. Then, the tube straight line position calculation unit 343 calculates the fourth tube straight line reference positions A14,... In all the sections F,.

  When proceeding to step 55 (pipe curve position calculation), the pipe curve position calculation unit 344 forms a peak at the intersection of the adjacent fourth-pipe straight line reference positions A14 and A14 (below the intersection). It is determined whether the intersection angle is less than 180 degrees or a valley is formed (the lower intersection angle of the intersection is 180 degrees or more). Then, the tube curve position calculation unit 344 inputs the bend radius of the tube curve portion permitted to be used via the bend radius input unit 146 so that the tube curve portion is arranged at the boundary of the section F. A circle whose radius is the bending radius of the curved portion is calculated as the primary pipe curve reference position A21.

  Specifically, the tube curve position calculation unit 344 determines that the adjacent fourth tube straight line reference positions A14 and A14 form a peak at the intersection of each other, as shown in FIG. In this case, a circle inscribed in each of the fourth tube straight line reference positions A14 and A14 is calculated as the first tube curve reference position A21, and as shown in FIG. When it is determined that the positions A14 and A14 form a valley at the intersection of each other, the circle passing through the intersection of the fourth-pipe straight line reference positions A14 and A14 is calculated as the first-pipe curve reference position A21. .

  At this time, the tube curve position calculation unit 344 determines that the intersection A211 between the primary tube curve reference position A21 and each fourth tube straight line reference position A14 is based on the bending radius of the tube curve portion permitted to be used. The primary tube curve reference position A21, which is the same radius as the bending radius of the allowed tube curve portion, is calculated so as to satisfy the condition that the middle point A141 of the fourth tube straight line reference position A14 is not exceeded.

  Then, the tube curve position calculation unit 344 calculates the primary tube curve reference position A21 having the largest radius among the primary tube curve reference positions A21 that satisfy the condition. As a result, when the plurality of tube curve portions can be arranged, the tube curve position calculation unit 344 arranges the tube curve portion having the largest bending radius among the plurality of tube curve portions.

  When proceeding to step 56 (pipe straight line position calculation), the pipe straight line position calculation unit 343 determines whether each section F is a section of a pipe straight line section or a section of a pipe curve section on a plane. When the section straight line position calculation unit 343 determines that the section F is a section of the pipe straight section on the plane, as shown in FIGS. 14B, 15B, and 16B, (F4, F6 and F8 are sections of the tube curve portion in the plane, but are illustrated as an example), the primary tube curve reference position A21 is directly calculated as the secondary tube curve reference position A22, and the adjacent secondary tube curve A common tangent of the reference positions A22, 22 is calculated as a fifth pipe straight line reference position A15.

  On the other hand, when it is determined that the section F is a section of the pipe curve portion on the plane, the tube straight line position calculation unit 343 has a common as shown in FIGS. 14 (c), 15 (c), and 16 (c). The position where the primary pipe curve reference position A21 has moved along the fourth pipe straight line reference position A14 so that the contact point with the tangential fifth pipe straight line reference position A15 is located on the boundary of the section F is the first position. While calculating as the secondary pipe curve reference position A22, as shown in FIGS. 14 (d), 15 (d), and 16 (d), the second secondary pipe curve reference position A22, 22 is common. Is calculated as the fifth pipe straight line reference position A15.

  In addition, FIG. 14 forms a crest and a crest at the intersection of the fourth-pipe straight line reference positions A14 and A14 at adjacent boundaries, and FIG. 15 forms a trough and a trough. FIG. 16 illustrates a case where a peak portion and a valley portion are formed. Then, as shown in FIG. 17A, the pipe straight line position calculation unit 343 obtains the fifth pipe straight line reference position A15,... And the secondary pipe curve reference position A22,. Calculate.

  When the processing proceeds to step 57 (start / end position calculation), as shown in FIG. 17B, the position (height) information of the start point C of the pipeline is input via the start point position input unit 143, and the end point position is also input. By inputting the position (height) information of the end point D of the pipe line via the input unit 144, the pipe straight line position calculation unit 343 is predetermined in the horizontal direction from the start point C as shown in FIG. The straight line located at the distance is calculated as the start pipe straight line reference position A3.

  Then, as shown in FIG. 18B, the pipe curve position calculation unit 344 calculates a circle that is in contact with the start pipe straight line reference position A3 on the upper side as the start pipe straight line reference position A4, and at the same time, the start pipe straight line reference position A3. A circle that is in contact with the fifth pipe straight line reference position A15 adjacent to the lower side is calculated as the start pipe curve reference position A4. Thereafter, as shown in FIG. 18C, the pipe straight line position calculation unit 343 calculates a common tangent of the pair of start pipe curve reference positions A4 and A4 as the start pipe straight line reference position A3.

  Similarly, as shown in FIG. 19A, the pipe straight line position calculation unit 343 calculates the end pipe straight line reference positions A5 and A5, and the pipe curve position calculation unit 344 includes the end pipe straight line reference position A6. , A6 is calculated. Then, as shown in FIG. 19B, the pipe axis A of the pipe line in the vertical cross section is designed, and the pipe line storage means 24 stores the position information of the pipe axis A of the pipe line in the vertical cross section.

  When proceeding to step 58 (pipe section calculation), the pipe section calculation means 33 stores the information of the pipe cross section stored in the pipe section storage means 23 in step 3 in the pipe storage means 24 in step 57. The combined calculation is performed on the position information of the pipe axis A of the pipe line in the vertical section. In this way, it is possible to design a three-dimensional pipe line that is lower than a set distance from the ground surface and arranged along the ground surface.

  As shown in FIG. 20, step 6 (embedded object separation pipe line design) includes step 61 (buried object position calculation), step 62 (separation distance calculation), step 63 (separation pipe line reference position calculation), step 64 ( Pipe straight line reference position calculation), step 65 (pipe curve position calculation), step 66 (pipe straight line position calculation), and step 67 (pipe cross section calculation). Each step 61-67 is explained in full detail below.

  When proceeding to step 61 (calculation of buried object position), first, the pipe line designed in three dimensions is returned to the position information of the pipe axis A. Then, as shown in FIG. 21 (a), the embedded object calculation means 32 stores the three-dimensional position information of the embedded object stored in the embedded object storage means 22 in step 2 and the pipeline storage means 4 in step 4. Based on the stored position information of the pipeline on the plane, the position K of the buried object in the longitudinal section cut at the position of the pipeline is calculated. The embedded object storage means 22 stores information on the position K of the embedded object in the longitudinal section.

  When proceeding to step 62 (separation distance calculation), the separation distance calculation unit 345 inputs the information of the set distance (position at which the pipe line is separated from the embedded object) via the separation distance input unit 147, so that the separation distance calculation unit 345 It is determined whether or not is separated from the buried object by a set distance or more. When the separation distance calculation unit 345 determines that the pipeline is not separated from the embedded object by a set distance or more, the pipeline output means 41 indicates the position of the pipeline to be changed (indicated by a bold line in FIG. 21A). Output).

  Proceeding to step 63 (separated pipeline reference position calculation), by inputting the direction (upward or downward) in which each pipeline to be changed is separated from the embedded object via the separation direction input unit 148, The separation reference position calculation unit 346 calculates a position that is higher (or lower) by a set distance from the embedded object as the separation reference position L of the pipeline.

  For example, when each pipe line to be changed is input so as to be separated upward from the buried object, the separation reference position calculation unit 346 is positioned higher than the upper end of the buried object by a set distance as shown in FIG. In addition, a straight line having the same distance as the width of the embedded object in the horizontal direction is calculated as the separation reference position L.

  Upon proceeding to step 64 (pipe straight line reference position calculation), the pipe straight line position calculation unit 343 determines that the pipe straight line portion is arranged according to the separation reference position L, as shown in FIG. L is calculated as it is as the separation tube straight line reference position A7. Then, the tube straight line position calculation unit 343 calculates the space tube straight line reference positions A7,... At all the space tube straight line reference positions L,.

  When the processing proceeds to step 65 (pipe curve position calculation), the pipe curve position calculation unit 344 sets, as shown in FIG. 22B, a circle that is in contact with the separation tube straight line reference position A7 on the upper side as the separation tube curve reference position A8. In addition to the calculation, a circle that is in contact with the fifth tube straight line reference position A15 adjacent to the separation pipe straight line reference position A7 on the lower side is calculated as the separation pipe curve reference position A8.

  At this time, the tube curve position calculation unit 344 bends the tube curve portion based on the bend radius of the tube curve portion permitted to be used so that the pair of separated tube curve reference positions A8 and A8 do not intersect. A separation pipe curve reference position A8 having the same radius as the radius is calculated. As a result, when the plurality of tube curve portions can be arranged, the tube curve position calculation unit 344 arranges the tube curve portion having the largest bending radius among the plurality of tube curve portions.

  The pipe curve position calculation unit 344 includes a pair of spaced pipe curve reference positions A8 and A8, which have the same radius as the pipe curve part having the smallest bending radius among the plurality of pipe curve parts permitted to be used. In this case, as shown in FIG. 22 (c), the circle that is in contact with the separation tube straight line reference position A7 on the lower side is calculated as the separation tube curve reference position A8 and is the second closest to the separation tube straight line reference position A7. A circle that is in contact with the fifth pipe straight line reference position A15 on the upper side is calculated as the separation pipe curve reference position A8.

  When proceeding to step 66 (pipe straight line position calculation), the pipe straight line position calculation unit 343, as shown in FIGS. 23 (a) and 23 (b), common tangents of the pair of separated pipe curve reference positions A8 and A8. Is calculated as the separation tube straight line reference position A7. Then, as shown in FIGS. 23C and 24, the pipe axis A of the pipe line in the longitudinal section is designed, and the pipe storage means 24 stores the position information of the pipe axis A of the pipe line in the longitudinal section. .

  When the process proceeds to step 67 (pipe section calculation), the pipe section calculation means 33 stores the information of the pipe cross section stored in the pipe section storage means 23 in step 3 in the pipe storage means 24 in step 66. The combined calculation is performed on the position information of the pipe axis A of the pipe line in the vertical section. In this way, it is possible to design a three-dimensional pipe line that is separated from the buried object by a set distance or more.

  When the process proceeds to step 7 (calculation of draw tension), the draw tension calculating means 35 is changed for each change point E with respect to the designed pipe line based on the draw tension calculating formula of FIG. The drawing tension is calculated, and it is determined whether or not the drawing tension is equal to or greater than the set value stored in the drawing tension storage means 25 (normal or abnormal). When the drawing tension calculating means 35 determines that the drawing tension is equal to or higher than the set value (abnormal), the drawing tension output means 42 is abnormal (the design of the pipe line should be changed). Output.

  When the process proceeds to step 8 (side pressure calculation), the side pressure calculating means 36 calculates a flat pipe curve portion with respect to the designed pipe line based on the side pressure calculation formula of FIG. The side pressure is calculated every time, and it is determined whether the side pressure is equal to or greater than the set value stored in the side pressure storage means 26 (normal or abnormal). When the side pressure calculating means 36 determines that the side pressure is equal to or higher than the set value (abnormal), the side pressure output means 43 outputs that it is abnormal (the design of the pipe should be changed).

  Proceeding to Step 9 (pipe design), the pipes to be changed (pipe straight part, pipe curve part) are changed via the pipe straight line position input unit 141 and the pipe curve position input unit 142 in order to optimize the designed pipe. ), The tube straight line position calculation unit 343 and the tube curve position calculation unit 344 calculate the position of the tube straight line portion and the position of the tube curve portion, respectively. In addition, the pipe calculation means 34 can calculate so that it may correct | amend with respect to each pipe with respect to the pipe line which consists of a plurality (three in this embodiment) pipe. And the pipe line memory | storage means 24 memorize | stores the positional information on the changed pipe line.

  When proceeding to step 10 (output table calculation), based on the calculation formula stored in the output table storage unit 27, the output table calculation unit 37 sets a measuring point for each predetermined distance with respect to the designed pipeline. Information on the pipelines at the measurement points (for example, altitude, embedding depth, etc.) and information on the pipelines between the measurement points (eg, the section distance, the pipe length, etc.) are calculated. Then, the output table output means 44 outputs the information calculated by the output table calculation means 37 as, for example, a design drawing in which the pipeline and each information are written together.

  As described above, according to the pipeline design system according to the present embodiment, the ground storage unit 21 stores the position information of the ground surface in the longitudinal section, and the reference position calculation unit 341 of the pipeline calculation unit 34 is set from the ground surface. A position that is lower by the distance and parallel to the ground surface is calculated as the reference position H of the pipeline. In the pipe calculation means 34, the pipe straight line position calculation unit 343 calculates the position of the pipe straight line portion arranged according to the reference position H of the pipe, and the pipe curve position calculation unit 344 calculates the pipe straight line portions. The position of the arcuate tube curve to be connected is calculated.

  In this way, based on the position information G of the ground surface in the longitudinal section, the pipeline calculation means 34 calculates the position A of the pipeline in the longitudinal section, so that it is arranged along the ground surface that is lower than a set distance from the ground surface. Can be designed. Therefore, it is possible to easily design a pipe line buried along the ground surface.

  Further, according to the pipeline design system according to the present embodiment, the division calculation unit 342 divides the reference position H of the pipeline into a plurality of sections F,. The pipe straight line position calculation unit 343 calculates the position of the pipe straight line part, and the pipe curve position calculation unit 344 calculates the position of the pipe curve part, whereby the reference position H of the pipe line is determined for each section F. Accordingly, it is possible to design a pipe line in which the pipe straight line portion is arranged and the pipe curve portion is arranged at the boundary between the sections F and F.

  Further, according to the pipeline design system according to the present embodiment, when the plurality of tube curve portions having different bending radii can be arranged by the tube curve position calculation unit 344, the plurality of tube curve portions are calculated. Among them, it is possible to design a pipe line in which a pipe curve portion having the largest bending radius is arranged. Thereby, since the change of the position of the pipe line in the longitudinal section can be designed gently, the drawing tension and the side pressure can be designed small.

  Further, according to the pipeline design system according to the present embodiment, the pipeline storage unit 24 stores the position information A of the pipeline in the plane, and the ground surface storage unit 21 stores the positional information of the ground surface in three dimensions. doing. Then, based on the position information A of the pipeline in the plane and the position information of the ground surface in three dimensions, the ground surface calculation means 31 calculates the position G of the ground surface in the longitudinal section cut at the position of the pipeline. Thereby, based on the calculated position G of the ground surface in the longitudinal section, it is possible to design a pipe line that is lower than the ground surface by a set distance or more and arranged along the ground surface.

  Further, according to the pipe line design system according to the present embodiment, the pipe line calculating means 34 arranges only the pipe straight line part in the longitudinal section in the section of the pipe curve part in the plane, that is, the pipe curve part in the longitudinal section. The pipeline is calculated so as not to place. Thereby, since it becomes the design of the pipe line corresponding to the pipe | tube which has rigidity, the design drawing close | similar to a construction drawing can be created.

  Further, according to the pipeline design system according to the present embodiment, the pipeline storage means 24 stores the position information A of the pipeline in the longitudinal section, and the buried object storage means 22 positions the buried object in the longitudinal section. Information K is stored. Then, the separation distance calculation unit 345 of the pipe line calculation unit 34 determines whether or not the pipe line is separated from the embedded object by a set distance or more.

  In this way, based on the position information A of the pipe line in the vertical section and the position information K of the buried object in the vertical section, the pipe calculation means 34 calculates the position A of the pipe line in the vertical section, thereby It is possible to design a pipeline that is more than a set distance away from the object. Therefore, it is possible to easily design a pipeline that is separated from the buried object.

  Further, according to the pipeline design system according to the present embodiment, the separation reference position calculation unit 346 calculates a position higher or lower by a set distance from the embedded object as the separation reference position L of the pipeline. The tube straight line position calculation unit 343 calculates the position of the tube straight line portion arranged according to the separation reference position L of the pipeline, and the tube curve position calculation unit 344 has an arc shape that connects the tube straight line portions to each other. The position of the tube curve portion is calculated. Thereby, it is possible to design a pipeline that is separated from the embedded object by a set distance or more.

  Further, according to the pipeline design system according to the present embodiment, the pipeline storage means 24 stores the position information A of the pipeline in the plane, and the buried object storage means 22 has the three-dimensional buried object position information. Is remembered. Based on the position information A of the pipe line in the plane and the position information of the three-dimensional buried object, the buried object calculating means 32 calculates the position K of the buried object in the longitudinal section cut at the position of the pipe line. Thereby, based on the calculated position K of the embedded object in the longitudinal section, it is possible to design a pipeline that is separated from the embedded object by a set distance or more.

  Note that the pipeline design system and program according to the present invention are not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. Moreover, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  For example, the program according to the present invention may be stored in a computer-readable recording medium (a medium such as a CD or a DVD) and read by a computer via an auxiliary storage device. It may be configured so that it can be transmitted and received and can be directly read by the receiving computer.

  Further, in the pipeline design system and program according to the present invention, the pipeline calculation means 34 may be configured to be able to calculate a pipeline connecting two pipelines. In addition, when the pipe type / size is the same for each pipe number, the pipe calculation means 34 associates and connects two pipe lines having different pipe cross-sectional arrangements for each pipe number. A configuration capable of calculation is also possible.

  Further, the pipeline design system and program according to the present invention may be configured to include excavation amount calculation means for calculating the amount of soil to be excavated when laying the designed pipeline. Such excavation amount calculating means calculates the amount of soil to be excavated based on the product of the burial depth of the conduit, the width of the conduit and the length of the conduit, and calculates the earthwork cost from the amount of soil to be excavated. Calculate (cost required for excavation work). In addition, you may further provide the digging amount memory | storage means which memorize | stores such a calculation formula and a calculation result, and the digging amount output means which outputs such a calculation result.

  Further, in the pipeline design system and program according to the present invention, it is also possible to provide a sliding phenomenon calculation means for calculating whether or not the designed electric wire gradually moves downward due to thermal contraction, so-called sliding phenomenon is generated. Good. Such sliding phenomenon calculating means calculates the critical temperature change for the designed electric wire based on the critical temperature change calculation formula shown in FIG. 27A, and whether the calculated critical temperature change is equal to or greater than a set value. (Normal or abnormal).

  Note that slippage phenomenon storage means for storing such calculation formulas and calculation results and slippage phenomenon output means for outputting such calculation results may be further provided. When the slip phenomenon calculating means determines that the critical temperature change is equal to or higher than the set value (abnormal, that is, the slip phenomenon occurs), the slip phenomenon output means is abnormal (design change of the pipeline). Output).

  In the pipeline design system and program according to the present invention, the configuration in which the pipeline position is variously calculated based on the tube axis A has been described. However, the configuration is not limited thereto. For example, a configuration in which the position of the pipeline is variously calculated based on the upper end and the lower end of the pipeline may be used.

  Further, in the pipeline design system and program according to the above-described embodiment, the partition calculation unit 342 includes the sections (F1, F3, F5, F7, F9) of the pipe curve section and the sections (F2, F4) of the pipe straight section on the plane. , F6, F8), the configuration in which the pipeline reference position H is partitioned into a plurality of sections F,... Is not limited to this configuration. For example, the section calculation unit 342 may be configured to partition the pipe reference position H into a plurality of sections F,... Without considering the section of the straight pipe section and the section of the tubular curve section on the plane.

  Further, in the pipeline design system and program according to the above-described embodiment, the partition calculation unit 342 is a partition reference that connects the start point H1 and the end point H2 of the pipe reference position H in the section F in the partitionable region of the section F. Although the configuration has been described in which the calculation is performed so that the line J is divided at the position of the pipe reference position H having the largest height difference, the configuration is not limited thereto. For example, the section calculation unit 342 may be configured to perform calculation so that the distance of each section F is within a predetermined range and is divided by an equal distance.

  Further, in the pipeline design system and program according to the above-described embodiment, the separation reference position calculation unit 346 has a straight line having a distance equal to the width dimension of the buried object in the horizontal direction at a position higher than the upper end of the buried object by a set distance. The configuration for calculating the separation reference position L has been described, but the configuration is not limited thereto. For example, the separation reference position calculation unit 346 may be configured to calculate the position of a straight line or a curve along the upper edge of the embedded object as the separation reference position L.

  In the pipeline design system and program according to the above-described embodiment, the pipe straight line position calculation unit 343 has described the configuration in which the separation reference position L is directly calculated as the separation pipe straight line reference position A7. I can't. For example, the tube straight line position calculation unit 343 may calculate the separation tube straight line reference position A7 so as to be further away from the embedded object than the separation reference position L.

  In the pipeline design system and program according to the above-described embodiment, the configuration in which information on the position (set distance) for burying the pipeline is input via the burying position input unit 145 has been described. Not limited. For example, information on the position (set distance) at which the pipe is embedded is stored in the pipe storage unit 24 as a predetermined value, and the pipe calculation unit 34 may calculate the pipe based on the predetermined value. .

  Further, in the pipe line design system and program according to the above-described embodiment, the configuration in which the pipe curve part allowing use is input from the pipe curve part having a plurality of bending radii via the bending radius input part 146 has been described. However, it is not limited to such a configuration. For example, the configuration may be such that information on usable pipe curve portions is stored in the pipeline storage means 24 as a predetermined value, and the pipeline calculation means 34 calculates the pipeline based on the predetermined value.

  In the pipeline design system and program according to the above-described embodiment, the configuration in which the distance (set distance) at which the pipeline is separated from the embedded object is input via the separation distance input unit 147 is described. Not limited to. For example, information on the distance (set distance) at which the pipe is separated from the buried object is stored in the pipe storage means 24 as a predetermined value, and the pipe calculation means 34 calculates the pipe based on the predetermined value. It may be configured.

  In the pipeline design system and program according to the above-described embodiment, the configuration in which the direction in which the pipeline is separated from the embedded object is input via the separation direction input unit 148, but the configuration is not limited thereto. . For example, the pipe calculation means 34 may be configured to calculate an optimum direction in which the pipe is separated from the buried object based on the position of the pipeline and the position of the buried object.

  In the pipeline design system and program according to the above embodiment, the configuration in which the predetermined range of the distance of the section F is the predetermined value stored in the pipeline storage unit 24 has been described. However, the configuration is limited to such a configuration. Absent. For example, a section distance input unit may be provided, and the range of the section F distance may be input via the section distance input unit.

  In the pipeline design system and program according to the above embodiment, the configuration in which the set value of the pull-in tension is the set value stored in the pull-in tension storage means 25 has been described. However, the configuration is not limited thereto. For example, a configuration in which a pull-in tension input unit is provided and a set value of the pull-in tension is input via the pull-in tension input unit may be used.

  In the pipeline design system and program according to the above-described embodiment, the configuration in which the set value of the side pressure is the set value stored in the side pressure storage unit 26 has been described. However, the configuration is not limited thereto. For example, a configuration in which a side pressure input unit is provided and a set value of the side pressure is input via the side pressure input unit may be employed.

  Moreover, in the pipeline design system and program which concern on the said embodiment, although the structure where a pipe | tube is a conduit tube was demonstrated, it is not restricted to such a structure. For example, the pipe may be a water pipe (water pipe), a drain pipe (sewage pipe), or a gas pipe.

  DESCRIPTION OF SYMBOLS 1 ... Input means, 2 ... Memory | storage means, 3 ... Calculation means, 4 ... Output means, 5 ... Control means, 21 ... Ground surface storage means, 22 ... Embedded object storage means, 24 ... Pipe line storage means, 31 ... Ground surface calculation means 32 ... buried object calculation means, 34 ... pipe line calculation means, 341 ... reference position calculation section, 342 ... section calculation section, 343 ... pipe straight line position calculation section, 344 ... pipe curve position calculation section, 345 ... separation distance calculation section 346... Separation distance position calculation unit

Claims (5)

In order to design a pipeline buried in the ground, a pipeline design system comprising storage means for storing predetermined information and calculation means for calculating the stored information to design the pipeline,
The storage means includes ground surface storage means for storing position information of the ground surface in the longitudinal section,
The calculating means is a pipe calculating means for calculating the position of the pipe line in the vertical section so that the pipe line is arranged along the ground surface and lower than the set distance from the ground surface based on the position information of the ground surface in the vertical section. Prepared,
The pipe calculation means includes a reference position calculation unit that calculates a position that is lower than the ground surface by a set distance and parallel to the ground surface as a reference position of the pipe, and a pipe in a longitudinal section that is arranged according to the reference position of the pipe line. A pipe line design system comprising: a pipe straight line position calculation unit that calculates a position of a straight line part; and a pipe curve position calculation part that calculates a position of a pipe curve part in a longitudinal section connecting the pipe straight line parts. The pipeline calculation means further includes a partition calculation unit that partitions the reference position of the pipeline into a plurality of sections,
The pipe straight line position calculation unit calculates the position of the pipe straight line part in the longitudinal section so that the pipe straight line part is arranged according to the reference position of the pipe line for each section divided,
The pipe line design system according to claim 1, wherein the pipe curve position calculation unit calculates the position of the pipe curve part in the longitudinal section so that the pipe curve part is arranged at the boundary of the section.   The tube curve position calculation unit calculates the tube curve portion having the largest bending radius among the plurality of tube curve portions when a plurality of tube curve portions having different bending radii can be arranged. Item 3. A pipeline design system according to item 1 or 2. The storage means includes pipe storage means for storing the position information of the pipe in the plane,
The surface storage means further stores the position information of the ground surface in three dimensions,
The computing means comprises ground surface computing means for computing the position of the ground surface in a longitudinal section cut at the position of the pipe line based on the position information of the pipe line in the plane and the position information of the ground surface in three dimensions. The pipe line design system according to any one of the above. In a computer readable program,
Computation means for computing predetermined information and designing pipes buried in the ground,
The calculating means is a pipe calculating means for calculating the position of the pipe line in the vertical section so that the pipe line is arranged along the ground surface and lower than the set distance from the ground surface based on the position information of the ground surface in the vertical section. Prepared,
The pipe calculation means includes a reference position calculation unit that calculates a position that is lower than the ground surface by a set distance and parallel to the ground surface as a reference position of the pipe, and a pipe in a longitudinal section that is arranged according to the reference position of the pipe line. A program comprising: a tube straight line position calculation unit that calculates the position of a straight line part; and a tube curve position calculation unit that calculates the position of a tube curve part in an arcuate vertical section connecting the pipe straight line parts.

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