WO2022269905A1 - ポールの不平衡荷重を算出する装置、方法及びプログラム - Google Patents

ポールの不平衡荷重を算出する装置、方法及びプログラム Download PDF

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Publication number
WO2022269905A1
WO2022269905A1 PCT/JP2021/024155 JP2021024155W WO2022269905A1 WO 2022269905 A1 WO2022269905 A1 WO 2022269905A1 JP 2021024155 W JP2021024155 W JP 2021024155W WO 2022269905 A1 WO2022269905 A1 WO 2022269905A1
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WO
WIPO (PCT)
Prior art keywords
pole
cable
unbalanced load
tension
conditions
Prior art date
Application number
PCT/JP2021/024155
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English (en)
French (fr)
Japanese (ja)
Inventor
健人 ブンポン
正樹 和氣
裕明 谷岡
健一郎 山崎
聡一 石川
Original Assignee
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2023529409A priority Critical patent/JP7619456B2/ja
Priority to PCT/JP2021/024155 priority patent/WO2022269905A1/ja
Publication of WO2022269905A1 publication Critical patent/WO2022269905A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

Definitions

  • the present disclosure relates to a technique for eliminating unbalanced loads generated on poles due to differences in installation conditions of cables such as power lines and telephone lines, which are mainly laid on poles such as utility poles and signal poles that exist outdoors. .
  • the tension generated by the cable to be laid on the pole and the resultant force of the load on other attachments are taken into consideration, and this becomes the resultant force (unbalanced load) of the load acting on the pole.
  • the types of poles to be used, etc. are determined after taking into account the influence of uncertain factors such as the strength of the wind pressure and the hardness of the soil on the unbalanced load.
  • a design load is set for each type of pole as a standard for the allowable load, and the designer when actually constructing the pole should consider the above unbalanced load, the strength of the wind pressure, the hardness of the soil, etc. Select a pole that has a design load that can withstand the load that occurs, taking into account the effects of uncertainties.
  • a branch line, a support, etc. may be installed in a direction that offsets the unbalanced load.
  • the purpose of the present disclosure is to enable calculation of changes in the unbalanced load of the pole when the cable installation conditions are changed.
  • the present disclosure utilizes the fact that cable tension varies depending on cable laying conditions, and is characterized in that the unbalanced load on the pole before and after changing the cable laying conditions is evaluated from the formulation of the balance of forces acting on the pole.
  • Apparatus and methods according to the present disclosure comprise: Considering the pole on which the cable is laid as the target pole when the cable laying conditions are changed, Calculate the tension of each cable laid on the target pole and the unbalanced load on the target pole.
  • the program of the present disclosure is a program for realizing a computer as each functional unit provided in the apparatus according to the present disclosure, and is a program for causing the computer to execute each step included in the method executed by the apparatus according to the present disclosure. .
  • FIG. 4 is a flow diagram of unbalanced load resolution performed by the apparatus of the present disclosure
  • FIG. 4 is an explanatory diagram of necessary information when calculating tension of a cable
  • FIG. 4 is an illustration of mechanical elements acting on the pole
  • FIG. 10 is an explanatory diagram of an example representing deformation of a pole
  • FIG. 11 is a flow diagram of an example of convergence calculation of a force balance formula
  • FIG. 5 is an explanatory diagram of feedback to the tension T of the cable by changing the deformation ⁇ of the pole
  • It is explanatory drawing of the elimination image of the unbalanced load by change of actual length.
  • FIG. 4 is a flow diagram of unbalanced load resolution performed by the apparatus of the present disclosure
  • FIG. 4 is an explanatory diagram of necessary information when calculating tension of a cable
  • FIG. 4 is an illustration of mechanical elements acting on the pole
  • FIG. 10 is an explanatory diagram of an example representing deformation of a pole
  • FIG. 11 is a flow diagram of an example
  • FIG. 4 is an explanatory diagram of an image of elimination of unbalanced load by changing the span length; It is explanatory drawing of the elimination image of the unbalanced load by changing the degree of sag. It is an explanatory diagram of an example of the influence when changing the cable laying conditions (actual length, span length, slackness, etc.) of the facility system, (a) shows before changing the cable laying conditions, and (b) shows the change of the cable laying conditions. indicate after.
  • FIG. 4 is an explanatory diagram of an example of an unbalanced load that occurs on a pole; It is an example of the connection form of a pole and a cable, (a) shows a restraint, (b) shows pull-through.
  • 2 is a functional block diagram of Embodiment 1.
  • FIG. FIG. 10 is a functional block diagram of Embodiment 2;
  • FIG. 14 shows a functional block diagram for executing this embodiment.
  • the apparatus according to this embodiment includes an unbalanced load calculator 12 and a cable laying condition calculator 13 .
  • the method performed by the device according to this embodiment is shown in FIG.
  • the unbalanced load calculator 12 calculates the unbalanced load acting on the pole (S11)
  • the cable laying condition calculator 13 calculates the cable laying conditions (actual length , span length, slackness, etc.) are determined (S12)
  • an implementation method for realizing the above cable laying conditions is determined (S13).
  • the device of the present disclosure can also be implemented by a computer and a program, and the program can be recorded on a recording medium or provided through a network. A detailed description will be given below.
  • step S11 In order to calculate the unbalanced load acting on the pole 91, it is necessary to calculate the tension due to the cable 92 laid on the pole 91.
  • FIG. FIG. 2 illustrates the conditions necessary to calculate the tension of a cable 92 laid between two poles 91.
  • T is the tension (kN)
  • w is the load of the cable 92 per unit length (kN/m)
  • S is the span length (that is, the distance between the installation positions of the poles 91) (m)
  • L is the cable 92
  • d represents the slackness (m) of the cable 92 .
  • the tension T generated in the cable 92 is expressed by Equation (1) or Equation (2).
  • w is a numerical value defined for each installed cable 92 .
  • S, L, and d represent the laying conditions of the cable 92.
  • the surface of the cable 92 is obtained as three-dimensional point cloud data expressed by three-dimensional coordinate points. There is a method for obtaining (see Patent Document 1).
  • step S12 a method for determining cable laying conditions (actual length, span length, slackness, etc.) for resolving the unbalanced load based on the calculated unbalanced load is described.
  • FIG. 3 expresses the dynamic elements acting on the pole 91, and the deformation of the pole 91 due to tensions T 1 , T 2 . . .
  • a reaction force F due to is considered, and between these forces, the force balance of the following equation (3) can be considered.
  • (Number 3) ( ⁇ T n )+F 0 (3)
  • Equation (3) can be considered at each pole 91 .
  • the reaction force F due to the deformation of the pole 91 due to the unbalanced load can be considered as shown in Equation (4).
  • (Number 4) F f( ⁇ ) (4)
  • .DELTA. represents the deformation of the pole 91, which can be represented by, for example, head displacement 83 of the pole 91 (FIG. 4).
  • the head displacement 83 can be obtained, for example, from the horizontal distance between the vertical axis 81 of the pole 91 and the cable laying position 82 .
  • FIG. 5 shows the determination flow of the cable tension T and the unbalanced load after changing the laying conditions (actual length L, span length S, slackness d, etc.).
  • the tension of the cable when the cable laying conditions (actual length, span length, slackness, etc.) are changed is calculated by using the actual length L, span length S, and slackness d after the change, using formula (1) or formula (2) ) (step b in FIG. 5).
  • the tension of the cable 92 changes, the unbalanced load changes, so the reaction force F of the pole 91 also changes (F') and can be calculated from the equation (3) (step c in FIG. 5).
  • the "pole deformation ⁇ " changes as the reaction force of the pole changes to F' (Fig. 5 step d).
  • the tension T of the cable 92 is recalculated by equation (1) or (2) (step e in FIG. 5).
  • A is a threshold for judging convergence and is set to a sufficiently small value. Calculations are repeated until formula (5) is satisfied (FIG. 5-c ⁇ d ⁇ e ⁇ f ⁇ c . . . ).
  • the cable tensions T 1 ', T 2 ' . can be used to calculate the unbalanced load after changing the cable laying conditions (actual length, span length, slackness, etc.) as shown in Equation (6).
  • Unbalanced load ( ⁇ T n ') (6)
  • B is a threshold value that is sufficiently small.
  • Cable laying conditions (actual length, span length, slackness, etc.) to eliminate the unbalanced load are found by finding the cable laying conditions (actual length, span length, slackness, etc.) that satisfy equation (7). can be calculated.
  • Step S31 Consider elimination of the unbalanced load by changing the actual length "changing the actual length of the high tension span". Since the actual length and tension of the cable 92 are inversely proportional (equation (2) and FIG. 8), "extending the actual length of the high tension span" allows for the elimination of unbalanced loads. Therefore, the unbalanced load can be eliminated by increasing the actual length up to the result calculated by Equation (8).
  • a member 71 is cut into the connecting portion between the pole 91 and the cable 92 to increase the actual length L of the cable 92 .
  • there is no hindrance due to other attachments 73 such as hardware at the connection portion ( bridging position) between the pole 91 and the cable 92, and the connection form of the pole 91 and the cable 92 is "fixed” (Fig. 13(a)). )) and can be implemented when the cable 92 has an excess length.
  • the connection form of the pole 91 and the cable 92 is "staying"
  • the support 72 of the cable 92 is separated on the left and right sides of the pole 91 and connected to the pole 91 via another attachment 73 .
  • Step S32 Change of span length
  • the unbalanced load can be eliminated (FIG. 9).
  • this construction method can be implemented if conditions such as extra cable length, land negotiation with the land owner, and the ground of the new location are satisfied.
  • construction method implementation conditions and from “unbalanced load on poles” and “construction method implementation conditions” to “optimal cable laying conditions (actual length, span length, slackness, etc.) to eliminate unbalanced loads. ) and the implementation method can be defined as a function k (equation 9).
  • k integer 9
  • Optimal cable laying conditions and implementation method for resolving unbalanced loads k (unbalanced load of pole, implementation conditions of construction method)) (9)
  • the apparatus and method according to this embodiment are Step S1 of calculating the tension T of the cable using the equation (1) or (2) based on the laying conditions of the cable 92; a step S2 of calculating the reaction force F and the amount of deformation ⁇ of the pole 91 based on the determined tension T of the cable 92 using equations (3) and (4); a step S3 of recalculating the tension T of the cable 92 based on the obtained deformation amount ⁇ of the pole 91; Step S4 for determining the convergence of the balance equation (5) based on the reaction force F of the pole 91 obtained in step S2 and the tension T of the cable 92 obtained in step S3; Step S5 of calculating the unbalanced load of the pole based on the obtained tension of the cable, and repeating steps S2 to S4 when it is determined that the convergence has not been achieved in step S4; , have As a result, the present disclosure can calculate changes in the unbalanced load of the pole 91 when the cable 92 laying conditions are changed,
  • FIG. 15 shows a functional block diagram for executing this embodiment.
  • the cable laying conditions actual length, span length, slackness, etc.
  • the tension of the cable laid on the adjacent pole also changes.
  • the flow of step S12 in example 1 can be replaced as follows.
  • a plurality of poles and cables installed on those poles are collectively called "equipment system", and an example is shown in FIG.
  • Equipment system An example is shown in FIG.
  • the loads T1' and T2' of the cable laid on the pole 91-3 can be considered as shown in equation (10).
  • each pole 91 As a dynamic element acting on each pole 91, the force balance between the tension of the cable 92 connected to the pole 91 and the reaction force due to the deformation of the pole 91 due to the unbalanced load is considered. be able to.
  • the relationship between "cable tension” and cable laying conditions (actual length, span length, slackness, etc.), "reaction force due to pole deformation due to unbalanced load” and displacement of pole cable laying position By defining the relationship of (head displacement), it is possible to calculate the unbalanced load of the pole 91 before and after changing the cable laying conditions more accurately than before.
  • This disclosure can be applied to the information and communications industry.

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  • Electric Cable Installation (AREA)
PCT/JP2021/024155 2021-06-25 2021-06-25 ポールの不平衡荷重を算出する装置、方法及びプログラム WO2022269905A1 (ja)

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JP2023529409A JP7619456B2 (ja) 2021-06-25 2021-06-25 ポールの不平衡荷重を算出する装置、方法及びプログラム
PCT/JP2021/024155 WO2022269905A1 (ja) 2021-06-25 2021-06-25 ポールの不平衡荷重を算出する装置、方法及びプログラム

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025120801A1 (ja) * 2023-12-07 2025-06-12 日本電信電話株式会社 架渉部材

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006353031A (ja) * 2005-06-17 2006-12-28 Nippon Telegr & Teleph Corp <Ntt> 電柱設計方法および電柱設計装置
JP2010279202A (ja) * 2009-05-29 2010-12-09 Chugoku Electric Power Co Inc:The 電柱ストレス管理システム
WO2016151680A1 (ja) * 2015-03-20 2016-09-29 東京電力ホールディングス株式会社 柱状構造物のたわみ量測定方法、及び柱状構造物の性能判定方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006353031A (ja) * 2005-06-17 2006-12-28 Nippon Telegr & Teleph Corp <Ntt> 電柱設計方法および電柱設計装置
JP2010279202A (ja) * 2009-05-29 2010-12-09 Chugoku Electric Power Co Inc:The 電柱ストレス管理システム
WO2016151680A1 (ja) * 2015-03-20 2016-09-29 東京電力ホールディングス株式会社 柱状構造物のたわみ量測定方法、及び柱状構造物の性能判定方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025120801A1 (ja) * 2023-12-07 2025-06-12 日本電信電話株式会社 架渉部材

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