CN113496081B - Overhead line manpower distance calculation method based on conical spiral model - Google Patents
Overhead line manpower distance calculation method based on conical spiral model Download PDFInfo
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Abstract
The invention relates to a human transport distance calculation method in overhead line design and construction, in particular to a human transport distance calculation method for an overhead line based on a conical spiral line model. The invention discloses a method for estimating the distance of a tower by using a spiral line mathematical model of an equidistant cone, which is characterized in that a mountain is equivalent to a cone, the modeling is carried out by using the spiral line mathematical model of the equidistant cone, the arc length calculation formula is used for estimating the distance of manpower climbing, and the distance is used as the manual transport distance of a tower. Therefore, the invention realizes the objective calculation of the manual transport distance, greatly reduces the data error, reduces the construction cost difference and improves the construction safety and efficiency.
Description
Technical Field
The invention relates to a manual transport distance calculation method in overhead line design and construction, in particular to a method for calculating the manual transport distance of an overhead line based on a conical spiral line model.
Background
In the electric power construction field, overhead line engineering is because the path length, tower position are punctiform and distribute, therefore the material transportation in the construction mostly needs through the manpower transportation, and the manpower transportation involves the rational design calculation of manpower distance, and the manpower distance then involves subsequent construction safety, construction cost and efficiency of construction. Therefore, when construction design and budget estimate are carried out, the average human transport distance of material transportation needs to be counted, especially for terrains such as hills and mountains, however, most of the existing human transport distances are set according to subjective experiences, so that errors of the human transport distances are large, construction management is disordered, construction cost difference is large, construction safety cannot be guaranteed, and construction efficiency is low.
Disclosure of Invention
The invention aims to provide the overhead line manpower distance calculation method based on the conical helix model, which reduces or eliminates data errors, reduces construction cost differences and improves construction safety and construction efficiency according to the defects of the prior art.
The purpose of the invention is realized by the following ways:
the method for calculating the manpower transport distance of the overhead line based on the conical spiral line model is characterized by comprising the following steps of:
1) The macro topography of the construction tower site is divided into four types according to the average grade of the topography where the manpower transportation passes in the overhead line: the average slope is less than 5 degrees and is flat land terrain, the average slope is (5-15 degrees) and is hilly land terrain, the average slope is (15-30 degrees) and is mountain land terrain, the average slope is more than 30 degrees and is mountain and mountain land terrain, and the horizontal distance L of the manpower transport distance to the terrain and the terrain height difference delta h are obtained, wherein delta h is more than 0,
2) Calculating a nominal terrain elevation difference angle beta according to the horizontal distance L of the terrain where the manpower distance passes and the terrain elevation difference delta h 0 ：
3) Calculating the equivalent slope angle beta of the mountain according to the horizontal distance L of the terrain where the manpower distance passes and the height difference delta h of the terrain:
4) Calculating the equivalent half cone angle x of the mountain cone according to the equivalent slope angle beta of the terrain,
5) The parameters of the conical helix model are calculated as follows:
the parameters in the above formula are specifically defined as follows:
b-coefficient, value 1.5;
n is the number of the periods of the conical spiral line, and is a positive number;
theta is the cumulative rotation angle of the conical helix, in rad;
d, the lead of the conical spiral line is specifically as follows: setting the distance of the moving point moving along the axis direction of the cone within one circle of the movement of the spiral line, wherein the unit is m;
alpha-the pitch dependence of the conical helix,
A. b, Q — intermediate parameters of the conic helix model;
6) Beta obtained in step 2) 0 When the angle is less than or equal to 5 degrees, the angle is set to be flat terrain, and the manpower distance L is set at the moment arc =1.2L; when beta is 0 When the angle is more than 5 degrees, calculating a human transport distance coefficient k according to an arc length model of the conical spiral line:
in the above formula, when k is calculated to be less than or equal to 1.1, k =1.2 is taken; k is a radical of t For adjusting coefficients based on terrain, wherein the terrain k is hilly t =1.0; mountain land topography k t =1.25; mountain and green terrain, k t ＝1.5；
7) Calculating the man-power distance L arc The following:
L arc ＝k×L。
in conclusion, the invention provides a method for calculating the manpower distance of an overhead line based on a conical spiral line model, which is characterized in that according to the specific situation of manual transportation of construction units in regions where vehicles cannot reach during the transportation of overhead line materials with fluctuant terrain, on the premise of uniformly manually ascending the slope (controlled within 5 degrees and relatively labor-saving), a mountain is equivalent to a cone, an equidistant conical spiral line mathematical model is adopted for modeling, the arc length calculation formula is utilized for estimating the distance of manpower climbing, and the distance is used as the tower position manual distance. Therefore, the invention realizes the objective calculation of the manual transport distance, greatly reduces the data error, reduces the construction cost difference and improves the construction safety and efficiency.
The present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
the method is based on the fact that when the macroscopic topography (flat ground, hills, mountains and mountains) of the tower positions of the line, the horizontal distance between the tower positions and the nearest highway and the height difference are known, the manual distance of each tower position of the project is calculated by using a conical spiral model.
The method for calculating the manpower transport distance of the overhead line based on the conical spiral line model is characterized by comprising the following steps of:
step 1: observing the terrain gradient of the area where the continuous 2-kilometer line is located, determining the macro terrain of the tower position to be calculated, and selecting one of the terrain adjustment coefficients k of flat terrain (within 5 degrees of average gradient), hilly terrain (within 5 degrees of average gradient), mountain terrain (within 5 degrees to 15 degrees of average gradient), mountain terrain (within 15 degrees to 30 degrees of average gradient) and mountain and green (above 30 degrees of average gradient) t As input parameters.
And 2, step: according to the horizontal distance L and the height difference delta h (taking the value larger than 0) of the manpower distance, the nominal height difference angle beta of the terrain is calculated according to the formula 1 0 ：
When beta is 0 When the angle is not more than 5 degrees, the manpower distance L is considered according to the flat ground arc ＝1.2L；
When beta is 0 >At 5 deg., proceed to the next step. The horizontal distance L of the manpower transportation distance is the horizontal distance from the manpower transportation starting point to the tower position terminal point, and the altitude difference delta h is the altitude difference from the manpower transportation starting point to the tower position terminal point; can be obtained according to the existing GPS digital terrain system.
And 3, step 3: calculating the equivalent slope angle beta of the mountain according to the horizontal distance L of the terrain where the manpower distance passes and the elevation difference delta h of the terrain:
wherein: the unit of beta is rad,
and 4, step 4: calculating the equivalent half-cone angle x of the mountain cone according to the formula 3:
wherein: x is rad;
and 5: the parameters of the conical helix model are calculated as follows:
the parameters in the above formula are specifically defined and valued as follows:
b-coefficient, value 1.5;
n is the number of the periods of the conical spiral line, and is a positive number;
theta is the cumulative rotation angle of the conical helix, and the unit is rad;
d-the lead of the conical helix, specifically: setting the distance of the moving point moving along the axis direction of the cone in a circle of the movement of the spiral line, wherein the unit is m;
alpha-the pitch dependence of the conical helix,
A. b, Q — intermediate parameters of the conic helix model;
and 6: calculating a human transport distance coefficient k according to an arc length model of the conical spiral line:
k above t For the adjustment of coefficients based on terrain, hilly terrain, k t =1.0; mountain land topography, k t =1.25, mountain and green, k t ＝1.5。
When calculated k is less than 1.1, take k =1.2;
and 7: calculating the manpower distance L arc The following were used:
L arc ＝k×L
on the basis, the calculation result can be checked according to the average climbing slope angle, and the average climbing slope angle delta is calculated as follows:
In the equidistant conic spiral mathematical model of the invention, the most important is the determination of half cone angle and lead, the equivalent half cone angle x of the mountain cone and the equivalent calculated slope angle beta of the mountain are in a complementary relation, the lead d can be determined by dividing the altitude difference by the periodicity, and the periodicity n is obtained by a large amount of data simulation, wherein the nominal altitude difference angle beta 0 The unit is degree, namely the included angle between the connecting line from the target tower position to the nearest parking point (the starting point of the manpower distance) of the transport vehicle and the horizontal plane.
The invention is based on the practical application of the invention in hilly terrain to calculate the man-power distance as follows:
the equivalent half cone angle x of the mountain cone and the equivalent calculated slope angle beta of the mountain are converted into degrees.
As can be seen from the table, the human-powered distance coefficient with large horizontal distance is large under the condition of the same height difference and different horizontal distances; if the same horizontal distance and different height differences exist, the manpower distance coefficient with large height difference is large; compared with the influence of the horizontal distance, the influence of the height difference is large, which accords with the practical situation and also accords with the physical law that the work done by overcoming the gravity is mainly related to the height difference of the object. The method for calculating the manpower transport distance of the overhead line by the conical spiral line model can calculate the manpower transport distance of each tower position more accurately, the construction budget estimate cost is more refined, and construction management confusion and construction safety risks caused by uncertainty of the budget estimate are avoided.
The invention is not described in the same way as the prior art.
Claims (1)
1. The method for calculating the manpower transport distance of the overhead line based on the conical spiral line model is characterized by comprising the following steps of:
1) The macro topography of the construction tower site is divided into four types according to the average grade of the topography where the manpower transportation passes in the overhead line: the average gradient is less than 5 degrees and is flat land terrain, the average gradient is (5 degrees to 15 degrees) and is hilly terrain, the average gradient is (15 degrees to 30 degrees) and is mountain terrain, the average gradient is more than 30 degrees and is mountain and mountain land terrain, and the horizontal distance L of the manpower transportation distance from the terrain and the terrain height difference delta h are obtained, wherein delta h is more than 0;
2) Calculating a nominal terrain elevation difference angle beta according to the horizontal distance L of the terrain where the manpower distance passes and the terrain elevation difference delta h 0 ：
3) Calculating the equivalent slope angle beta of the mountain according to the horizontal distance L of the terrain where the manpower distance passes and the height difference delta h of the terrain:
4) Calculating the equivalent half-cone angle x of the mountain cone according to the equivalent terrain slope angle beta,
5) The parameters of the conical helix model are calculated as follows:
the parameters in the above formula are specifically defined as follows:
b-coefficient, value 1.5;
n is the number of the periods of the conical spiral line, and is a positive number;
theta is the cumulative rotation angle of the conical helix, and the unit is rad;
d-the lead of the conical helix, specifically: setting the distance of the moving point moving along the axis direction of the cone in a circle of the movement of the spiral line, wherein the unit is m;
alpha-the pitch dependence of the conical helix,
A. b, Q — intermediate parameters of the conic helix model;
6) Beta obtained in step 2) 0 Setting the angle to be flat terrain when the angle is less than or equal to 5 DEG, wherein the manpower distance L arc =1.2L; when beta is 0 When the angle is more than 5 degrees, calculating a human transport distance coefficient k according to an arc length model of the conical spiral line:
in the above formula, when k is calculated to be less than or equal to 1.1, k =1.2 is taken; k is a radical of t For adjusting coefficients based on terrain, wherein the hilly terrain k t =1.0; mountain land topography k t =1.25; mountain and green terrain, k t ＝1.5；
7) Calculating the man-power distance L arc The following:
L arc ＝k×L。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436548A (en) * | 2011-10-26 | 2012-05-02 | 中国电力科学研究院 | Line wind load computing method for transmission tower in micro-morphogenetic region |
| CN107515408A (en) * | 2017-08-29 | 2017-12-26 | 国网福建省电力有限公司 | Power circuitry engineering path and the preparation method of landform |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436548A (en) * | 2011-10-26 | 2012-05-02 | 中国电力科学研究院 | Line wind load computing method for transmission tower in micro-morphogenetic region |
| CN107515408A (en) * | 2017-08-29 | 2017-12-26 | 国网福建省电力有限公司 | Power circuitry engineering path and the preparation method of landform |
Non-Patent Citations (1)
| Title |
|---|
| 利用高清影像地图精确计算输电线路工程人力运距;张鲲;《电力勘测设计》;20200430(第04期);全文 * |
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