CN104060877A - Economical efficiency analyzing method based on comprehensive unequal length spliced leg iron tower - Google Patents
Economical efficiency analyzing method based on comprehensive unequal length spliced leg iron tower Download PDFInfo
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Abstract
The invention relates to an economical efficiency analyzing method based on a comprehensive unequal length spliced leg iron tower. The economical efficiency analyzing method is characterized by comprising the following steps that (S01) influences of comprehensive unequal length spliced legs on the weight and foundation force of the iron tower are analyzed; (S02) oriented to different terrain gradients, the difference of work amounts when the two spliced leg modes of long and short legs and flat legs is analyzed; (S03) oriented to different terrain gradients, the economical efficiency of adopting the two spliced leg modes of the long and short legs and the flat legs is analyzed. The economical efficiency analyzing method based on the comprehensive unequal length spliced leg iron tower can effectively provide a scientific and reasonable reference standard for selecting the iron tower spliced leg mode, the suitable iron tower spliced leg mode can be selected more scientifically and more conveniently, and thus the effects of saving project investment and improving environment friendliness are achieved.
Description
Technical field
The present invention relates to Economic Analysis Method in circuit on power system engineering, specifically a kind of based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower.
Background technology
In Fujian Province, domestic mountain region (comprising hills) area is large, distributes wide, accounts for the whole province's gross area more than 90%.Plain area is little, distributes scattered, is mainly distributed in the lowers reaches of river such as the Min River, Jiulongjiang River, Jinjiang and lily magnolia small stream and with both sides along the river, basin, land.Maximum Zhangzhou Plain, only 566.7 square kilometres of areas.Therefore how the domestic Transmission Line Design in Fujian Province, adapt to the design focal point that mountain region feature is circuit always.
In June, 2010, there is the heavy rain that the duration is long, intensity is large in Fujian the Northwest, and amount of precipitation more usual annual rainfall in each department has all increased by 50% left and right, and electric power facility is caused to more serious impact, has many places to face the dangerous situations such as column foot landslide.Wherein special 110kV and following low-voltage lines are impaired more serious.Through scene, check, most of reason is that the steel tower basal plane side of falling and pit earthwork are too many, impeded drainage.Because of the basic backfill of pit earthwork, a cubic metre of earth source is mainly the basal plane side of falling.In Flood disaster repeatedly in the past, main reason all therewith roughly the same.
Notice > > requirement according to the < < Fujian Province General Office, the People's Government of Fujian Province government in December, 2011 issue about further reinforcement main line of communication both sides " green hill hangs white " control, electric power pylon more should reduce basal plane excavation when foundation construction.
For protection of the environment, reduce earthwork evacuation, prevent erosion, at mountain region steel tower, should adopt complete unequel leg extension.Yet in the project of transmitting and converting electricity universal design transmission line of electricity fascicle > > of < < State Grid Corporation of China, the mountain area of the same submodule of 110kV adopts same set of shaft tower series pacifically, does not consider unequal leg design.According to adding up in 2012～2016 years 500kV in Fujian Province and above, 220kV, 110kV power grid construction scale, the newly-built operation circuit of 220kV is amounted to the about 3932km of length single time, and the newly-built operation circuit of 110kV is amounted to the about 6302km of length single time.Therefore according to the lineament in Fujian, be necessary the universal design of 110kV electric power pylon to carry out the Deepen Design of complete unequel leg extension.
Summary of the invention
In view of this, in the work transmission line previous work from now on, more science, selected applicable steel tower connects leg form easily, carry out and adopt the comprehensive not isometric economic analysis that connects leg steel tower, provide a scientific and reasonable steel tower to connect the normative reference that leg form is selected, reduce earthwork evacuation, prevent erosion, thereby save construction investment and improve environment protecting, the invention provides a kind of based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower.
The present invention adopts following scheme to realize: a kind ofly based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower, it is characterized in that, comprise the following steps:
S01: analyze and adopt the comprehensive not isometric impact of leg on steel tower weight and basic power that connect;
S02: for different terrain slopes, analyze the difference of engineering quantity while adopting two kinds of unequal leg peace legs to connect leg form;
S03: for different terrain slopes, analyze and adopt two kinds of economic analysis that connect leg form of unequal leg peace leg.
In an embodiment of the present invention, in described step S01, between steel tower unequal leg, the design of high difference is meeting in structural configuration requirement situation, the main gradient of considering tower position, place landform, but the requirement due to structural configuration, steel tower connects the long high difference of leg and is not coordinating in addition under height base case, and the terrain slope that meets steel tower front or side surface direction is about 20～28 degree.
In an embodiment of the present invention, in described step S02, different engineering landform, according to Transmission Line Design custom, it is all to determine according to the form line of steel tower diagonal that steel tower connects leg length, basic load buried depth, Center stake and the longest leg footing piece discrepancy in elevation data that connect.
In an embodiment of the present invention, in described step S03, only to these three kinds of towers of mono-time tangent tower of 1A3-ZMC2,1D3-SZC2 double back tangent tower and 1D13-SJC2 double back angle tower respectively under unequal leg and flat leg design condition, 6 kinds of corresponding terrain slope situations are analyzed and comparison.
The present invention can effectively provide a scientific and reasonable steel tower to connect the normative reference that leg form is selected, more science, selected applicable steel tower connects leg form easily, thereby save construction investment and improve environment protecting.
Accompanying drawing explanation
Fig. 1 is the inventive method flow chart.
Fig. 2 is the flat leg of 1A3 of the present invention and unequal leg steel tower index (30m exhale claim high) schematic diagram.
Fig. 3 is the flat leg of 1D3 of the present invention and unequal leg steel tower index (30m exhale claim high) schematic diagram.
Fig. 4 is the flat leg of 1D13 of the present invention and unequal leg steel tower index (24m exhale claim high) schematic diagram.
Fig. 5 is the flat leg of 1A3 of the present invention and unequal leg basis expense index schematic diagram.
Fig. 6 is the flat leg of 1D3 of the present invention and unequal leg basis expense index schematic diagram.
Fig. 7 is the flat leg of 1D13 of the present invention and unequal leg basis expense index schematic diagram.
Fig. 8 is the flat leg of 1A3 of the present invention and unequal leg tower steel tower and foundation cost index schematic diagram.
Fig. 9 is the flat leg of 1D3 of the present invention and unequal leg tower steel tower and foundation cost index schematic diagram.
Figure 10 is the flat leg of 1D13 of the present invention and unequal leg tower steel tower and foundation cost index schematic diagram.
The specific embodiment
For making object of the present invention, technical scheme and advantage clearer, below will, by specific embodiment and relevant drawings, the present invention be described in further detail.
As shown in Figure 1, it is a kind of based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower that the present embodiment provides, and comprises the following steps:
S01: analyze and adopt the comprehensive not isometric impact of leg on steel tower weight and basic power that connect;
S02: for different terrain slopes, analyze the difference of engineering quantity while adopting two kinds of unequal leg peace legs to connect leg form;
S03: for different terrain slopes, analyze and adopt two kinds of economic analysis that connect leg form of unequal leg peace leg.
In described step S01, determine the comprehensive not isometric concept that connects leg of electric power pylon:
Steel tower unequal leg, is designed to the tower leg form of different length for adapting to topographical elevation difference between tower leg while designing steel tower, be mainly applicable to the region of accident of terrain;
Between steel tower unequal leg, the design of high difference is meeting in structural configuration requirement situation, the main gradient of considering tower position, place landform, but the requirement due to structural configuration, steel tower connects the long high difference of leg and is not coordinating in addition under height base case, and the terrain slope that meets steel tower front or side surface direction is about 20～28 degree;
Not isometricly connect the limited orientation of leg and do not limit two kinds, orientation form, limiting the not isometric leg that connects in orientation generally only provides the height of the tower leg of front and back side or left and right sides to change, adaptation to the ground changes completely, and existing basic employing does not limit the leg that connects in orientation, the i.e. comprehensive not isometric leg that connects.
In described step S02, different engineering landform, according to Transmission Line Design, be accustomed to, it is all to determine according to the form line of steel tower diagonal that steel tower connects leg length, basic load buried depth, Center stake and the longest data such as the leg footing piece discrepancy in elevation (base falls) that connect, and what terrain slope of the present invention referred to is exactly the gradient of this form line; The main Cost Index difference of considering flat leg and unequal leg two schemes, the major effect factor of difference value is tower position terrain slope, there is the Cost Index that makes two schemes to change in the same way in the variation of geology simultaneously, on the difference of both indexs, can not cause too large impact, when therefore the present invention analyzes, all by hard soil matter, hard soil matter is also the geology of ratio maximum in circuit simultaneously.
In described step S03, only to these three kinds of towers of mono-time tangent tower of 1A3-ZMC2,1D3-SZC2 double back tangent tower and 1D13-SJC2 double back angle tower respectively under unequal leg and flat leg design condition, 6 kinds of corresponding terrain slope situations are analyzed and comparison; Because design scheme of the present invention is effectively exhaled under high standard same, mainly tower weight, basic pattern and the earthwork are had to impact, so the expense of this each module is only containing earth and rock works, Foundation Design and tower engineering three part costs; For strictly embodying the difference of technology and economic indicator under unequal leg and flat leg design scheme, each module budget of the present invention is by unified level of organization: engineering landform is that to lift 0.8 kilometer of haul distance, 15 kilometers of automotive haul distances, engineering geology be hard soil for 100% mountain region, people.
Below make a concrete analysis of embodiments of the present invention:
The different terrain gradient adopts two kinds of economic analysis that connect leg form
Main compilation principles with get expense foundation
1) No. [2007] 139, Electricity Federation skill warp " building the notice of budget compilation and calculating standard > > and < < Fossil Fueled Power Plant Project construction budget compilation and the standard of calculating > > about issuing < < electricity power engineering " in project division and service fee norm execution; Electricity is fixed always to be made [2009] No. 3 " about adjusting the notice of power engineering construction estimated cost project and the standard of calculating ".
2) No. [2007] 15, Electricity Federation skill warp " about the notice of issue < < power construction engineering budget ration (version in 2006) > > " in quota employing; Cost for Electric Power Engineering and quota management master station " about the notice of issue < < power construction Project Budget quota (version in 2006) supplementary copy > > ".
3) Regional Wage subsidy is adjusted and is carried out electric fixed always making [2007] No. 12 " about announcing the notice of each department wage-like subsidy ".Fujian Province's wage-equivalent subsidy is 3.5 yuan/work day, and quota labor fee adjustment coefficient is 3.32%.
4) quota labor fee adjustment is carried out quota [2011] No. 39 " about adjusting the notice of power construction engineering unit price standard on artificial work day ".
5) adjustment of quota material machine is carried out [2012] No. 1 literary compositions of quota and " about issue Grid Construction Project preliminary budget quota price level, is adjusted the notice of coefficient ".
6) device property material price is carried out national grid electric fixed [2008] No. 17 " about the notice of issue power engineering device material price for estimation (version in 2008) ", fixed [2008] No. 26 of national grid electricity " adjusting the notice of coefficient about issuing State Grid Corporation of China's power engineering device material price for estimation ".
7) tax is adjusted Wen Jilie according to Fujian Province Department of Construction Fujian (2002) No. 60 Wen Ji Fujian Province tax bureau bulletins of building (2011 No. 4), by 3.477%, calculates.
8) No. [2008] 550, Fujian electricity capital construction " building the notice of budget compilation and calculating standard (trying) > > supplementary provisions about printing and distributing < < electricity power engineering ", social security rate is by 26%.
9) No. [2008] 936, Fujian electricity capital construction " about forwarding the notice of < < State Grid Corporation of China's project of transmitting and converting electricity preliminary design review work coordination meeting summary (fourth phase) > > ", public accumalation fund for housing construction rate line project is got by 10%.
2. the preparation method and the explanation that adopt
The present invention only to these three kinds of towers of mono-time tangent tower of 1A3-ZMC2,1D3-SZC2 double back tangent tower and 1D13-SJC2 double back angle tower respectively under unequal leg and flat leg design condition, 6 kinds of corresponding terrain slope situations are analyzed and comparison.Because design scheme of the present invention is effectively exhaled under high standard same, mainly tower weight, basic pattern and the earthwork are had to impact, so the expense of this each module is only containing earth and rock works, Foundation Design and tower engineering three part costs.
For strictly embodying the difference of technology and economic indicator under unequal leg and flat leg design scheme, each module budget of the present invention is by unified level of organization:
Engineering landform is that 100% mountain region, people lift 0.8 kilometer of haul distance, 15 kilometers of automotive haul distances, engineering geology for hard native.
Main material price is by following budget valency and market price row:
3. the technology of each module and economic indicator
As calculated, draw each module " tower material ", " basic steel ", " foundation concrete ", " pit earthwork ", " the basal plane earthwork ", " engineering cost ", " basic expense " totally 7 indexs.Wherein:
The calculating standard of " foundation concrete amount " is that C20 comprises basic main body above and retaining wall is considered the amount of concrete after super filling amount, but does not contain the amount of concrete of C10 bed course.
The calculating standard of " pit earthwork ": common slab foundation is for considering the heavy excavation earth volume after operation window and sloping coefficient; Draw the side's amount after for basic design amount of concrete deduction column exposed parts volume with hand-dug pile foundation of digging.
" engineering cost " is earth and rock works, Foundation Design and the tower engineering total cost after considering main material and talent's machine adjustment price differential.Wherein, the engineering cost of employing hand-dug pile foundation module also comprises the low strain detecting expense of hole digging pile.
" basic expense " is engineering cost after deduction tower engineering and corresponding price differential thereof.Be earth and rock works and Foundation Design and considering talent's machine adjustment price differential, and comprise the engineering cost after corresponding borehole low strain detection of the pile expense.
Three kinds of towers are respectively under unequal leg and flat leg design condition, and corresponding 6 kinds of terrain slope technology and economic indicator are as follows:
3.1 1A3(mono-time length short-legs) scheme
The flat leg of 3.2 1A3(mono-time straight line) scheme
3.3 1D3(double back length short-legs) scheme
The flat leg of 3.4 1D3(double back straight line) scheme
3.5 1D13(double back corner unequal legs) scheme
The flat leg of 3.6 1D13(double back corner) scheme
4. the technology between scheme and economic indicator comparative analysis
4.1 steel tower indexs
By Fig. 2, Fig. 3 and Fig. 4, can find out, adopt unequal leg design scheme steel tower index all high than flat leg scheme index; And along with the increase of terrain slope, steel tower index is tending towards reducing.Three kinds of towers are respectively 1.201,1.156,1.074 because adopting the tower material index of unequal leg and flat leg on average to increase coefficient simultaneously, progressively reduce.
4.2 basic expense indexs
By Fig. 5, Fig. 6 and Fig. 7, can find out, terrain slope be 12.5 ° with the lower gradient situation of 17.5 ° under, because all adopting common slab foundation with tower unequal leg and flat leg design scheme, unequal leg scheme basis expense index is all slightly high than flat leg scheme, is mainly the increase of Foundation Design amount.
Increase along with terrain slope, the two schemes bases patterns that mono-time tangent tower of 1A3 is corresponding with 1D3 double back tangent tower also use instead simultaneously for draw dig with hand-dug pile foundation after, flat leg scheme basis expense index enlarges markedly than unequal leg scheme, and surpasses unequal leg scheme.But along with the increase of the gradient, the index of unequal leg scheme also progressively increases, during 45 ° of the gradients that finally reaches capacity, two schemes basis expense indexs are close.
And 1D13 double back angle tower is when terrain slope is 25 °, the basic expense index of unequal leg scheme declines larger on the contrary, and lower than flat leg scheme, mainly because the common slab foundation of basic pattern while being 17.5 ° by original terrain slope changes into after digging foundation, reinforcement foundation, concrete and basal plane earthwork index all decline, particularly reinforcement foundation declines by a big margin, and descent coefficient is 0.667, and under this landform, unequal leg scheme basis expense is lower than flat leg scheme.But along with the increase of the gradient, unequal leg scheme index increases immediately and surpasses flat leg scheme, during 45 ° of the gradients that finally reaches capacity, two schemes basis expense indexs are close.
4.3 engineering cost indexs
By Fig. 8, Fig. 9 and Figure 10, can find out, engineering cost index sign trend is similar to basic expense index.
Although the tower weight index of three towers is tending towards reducing with the increase of terrain slope, but amplitude of variation is less, and the amplitude that Foundation Design amount increases with slope change is larger, so the major influence factors of steel tower employing unequal leg or flat leg design scheme engineering cost is Foundation Design amount.
5. liang connect the poor impact on whole construction costs of leg scheme expense
Single revolution turret engineering quantity is general and double back tangent tower is approaching, and therefore the expense trend of relevant single revolution turret can be with reference to double back tangent tower.By the comparison and analysis of 4.2 joint charts, the expense integral body of single time tangent tower, double back tangent tower unequal leg is lower than flat leg scheme; The expense of double back angle tower unequal leg bends down in flat leg scheme in part landform, and other landform is higher than flat leg scheme, and according to the terrain slope weighted statistical of general line project, the expense of unequal leg scheme finally can be higher than flat leg scheme.
After the terrain slope ratio average weighted of common engineering, single time tangent tower adopts the unequal leg scheme approximately 1.788 ten thousand/bases of can reducing expenses, single angle of revolution approximately 1.876 ten thousand/bases of can reducing expenses.As with reference to Guo Wang company version General Engineering Cost 110kV circuit fascicle 1F scheme in 2010, single loop circuit body expense is 50.861 ten thousand yuan/kilometer, steel tower radix is 3.10 base/kilometers, wherein anchor support ratio is 22%, adopt the steel tower design scheme single loop circuit of unequal leg can save body expense and be about 5.603 ten thousand yuan/kilometer, the ratio that accounts for body expense is 11.02%.
For double circuit line engineering, adopt as above computational methods, double back tangent tower adopts unequal leg scheme can reduce expenses approximately 1.876 ten thousand yuan/base and double back angle tower increases approximately 1.851 ten thousand yuan/base of expense.With reference to General Engineering Cost 1L scheme, double circuit line body expense is 80.893 ten thousand yuan/kilometer, steel tower radix is 3.10 base/kilometers, wherein anchor support ratio is 22%, adopt the steel tower design scheme double circuit line of unequal leg can save body expense and be about 3.274 ten thousand yuan/kilometer, the ratio that accounts for body expense is 4.05%.
6. conclusion
110kV transmission line of electricity in mountain region, Deng Fei level land, hills landform, flat leg tower is by adopting heightened foundation measure to meet the steel tower and basic engineering cost summation under the prerequisite of Environmental Design requirement, the result of comparing with basic engineering cost summation with unequal leg tower steel tower demonstration:
1) 110kV Dan Huita and double back tangent tower: in the time of terrain slope lower (below approximately 20 °) in the situation that, flat leg scheme is lower than unequal leg scheme cost, although spoir is many, landform is more slow, general soil erosion is not serious, and suggestion steel tower adopts flat leg schematic design; And the lower time of situation of terrain slope higher (more than approximately 20 °), unequal leg scheme is lower than flat leg scheme cost, and spoir is also fewer, and suggestion steel tower adopts unequal leg schematic design.110kV mono-revolution turret and double back tangent tower design objective are more approaching, and choice criteria is the same.
2) 110kV double back angle tower: in the situation that being 20 ° of-30 ° of left and right, unequal leg scheme is lower than flat leg scheme cost, and in the landform below 30 °, spoir is fewer again at terrain slope, suggestion steel tower adopts unequal leg schematic design; Under all the other terrain slopes, the flat leg scheme of steel tower is lower than unequal leg scheme cost, and suggestion steel tower adopts flat leg schematic design.
3) simultaneously according to above-mentioned 1) conclusion, single time steel tower of state net universal design transmission line of electricity 110kV universal for iron towers design and double back straight line are necessary to carry out complete unequel leg extension Deepen Design, can save construction investment and improve environment protecting.
4) double back angle tower adopts unequal leg design scheme construction costs slightly excellent under 20 ° of-30 ° of landform, and spoir is fewer again; While 0-20 ° of landform, unequal leg scheme construction costs is higher, but spoir is less; Terrain slope surpasses 30 °, and construction costs is with to abandon earth volume all higher, and this kind of situation is also fewer in practical engineering application.Therefore from the environmental angle of whole line project, consider, suggestion double back angle tower also adopts complete unequel leg extension Deepen Design.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; institute is understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. based on a comprehensive not isometric Economic Analysis Method that connects leg steel tower, it is characterized in that, comprise the following steps:
S01: analyze and adopt the comprehensive not isometric impact of leg on steel tower weight and basic power that connect;
S02: for different terrain slopes, analyze the difference of engineering quantity while adopting two kinds of unequal leg peace legs to connect leg form;
S03: for different terrain slopes, analyze and adopt two kinds of economic analysis that connect leg form of unequal leg peace leg.
2. according to claim 1 based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower, it is characterized in that: in described step S01, between steel tower unequal leg, the design of high difference is meeting in structural configuration requirement situation, the main gradient of considering tower position, place landform, but the requirement due to structural configuration, steel tower connects the long high difference of leg and is not coordinating in addition under height base case, and the terrain slope that meets steel tower front or side surface direction is about 20～28 degree.
3. according to claim 1 based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower, it is characterized in that: in described step S02, different engineering landform, according to Transmission Line Design custom, it is all to determine according to the form line of steel tower diagonal that steel tower connects leg length, basic load buried depth, Center stake and the longest leg footing piece discrepancy in elevation data that connect.
4. according to claim 1 based on the comprehensive not isometric Economic Analysis Method that connects leg steel tower, it is characterized in that: in described step S03, only to these three kinds of towers of mono-time tangent tower of 1A3-ZMC2,1D3-SZC2 double back tangent tower and 1D13-SJC2 double back angle tower respectively under unequal leg and flat leg design condition, 6 kinds of corresponding terrain slope situations are analyzed and comparison.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA286889A (en) * | 1929-01-29 | Marsh Goodrich Chauncey | Short leg tower extension | |
| CN202645105U (en) * | 2012-04-11 | 2013-01-02 | 中国电力工程顾问集团西北电力设计院 | +/-400kV DC transmission line terminal tower |
| CN202767607U (en) * | 2012-04-11 | 2013-03-06 | 中国电力工程顾问集团西北电力设计院 | ZV81 tangent tower for plus or minus 400 kV direct-current power transmission line |
| CN202899727U (en) * | 2012-04-11 | 2013-04-24 | 中国电力工程顾问集团西北电力设计院 | +/-400-kilovolt direct current transmission line ZV41 tangent tower |
-
2014
- 2014-07-14 CN CN201410330657.4A patent/CN104060877B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA286889A (en) * | 1929-01-29 | Marsh Goodrich Chauncey | Short leg tower extension | |
| CN202645105U (en) * | 2012-04-11 | 2013-01-02 | 中国电力工程顾问集团西北电力设计院 | +/-400kV DC transmission line terminal tower |
| CN202767607U (en) * | 2012-04-11 | 2013-03-06 | 中国电力工程顾问集团西北电力设计院 | ZV81 tangent tower for plus or minus 400 kV direct-current power transmission line |
| CN202899727U (en) * | 2012-04-11 | 2013-04-24 | 中国电力工程顾问集团西北电力设计院 | +/-400-kilovolt direct current transmission line ZV41 tangent tower |
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