CN114707851A - Quota measuring and calculating method and system for construction period of power transmission and transformation project - Google Patents

Abstract

The application discloses a quota measuring and calculating method and system for a construction period of a power transmission and transformation project. The method comprises the steps of firstly, determining construction contents in a target power transmission and transformation construction project; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering; then, according to the construction content, setting influence factors influencing the construction period, and screening each influence factor to obtain key influence factors; and finally, carrying out rated calculation of the construction period according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors. Therefore, the accuracy of the existing rated measurement and calculation of the construction period of the power transmission and transformation project is improved.

Description

Quota measuring and calculating method and system for construction period of power transmission and transformation project

Technical Field

The invention relates to the field of construction period quota measurement, in particular to a method and a system for measuring construction period quota of a power transmission and transformation project.

Background

With economic development, social progress and energy transformation, the application field of electric power is continuously expanded, the electric power service requirements and the consumption concept are increasingly diversified, personalized and low-carbon, and new industries, new statuses and new modes of the electric power industry are continuously brought forward. The management of the electric power project is advanced with time, the management of the construction period of the power transmission and transformation project can promote the effective improvement of the overall level of the project, and the method has an important supporting function for improving the project quality, saving the project cost and promoting the realization of the project target.

With the improvement of the construction organization level, the construction process technology, the construction project management level and the like, the construction period of the power transmission and transformation project is influenced to a certain extent, meanwhile, the power transmission and transformation project is greatly influenced by topographic and geological conditions and climate, and the conventional method for calculating the quota of the construction period has the problem of inaccuracy.

Disclosure of Invention

Based on the above, the embodiment of the application provides a method and a system for measuring and calculating the quota of the construction period of the power transmission and transformation project, which can improve the accuracy of the conventional method for measuring and calculating the quota of the construction period of the power transmission and transformation project.

In a first aspect, a method for estimating quota of construction period of power transmission and transformation project is provided, and the method comprises the following steps:

determining construction contents in a target power transmission and transformation construction project; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering;

setting influence factors influencing the construction period according to the construction content, and screening each influence factor to obtain key influence factors;

the method for screening the influence factors to obtain the key influence factors specifically comprises the following steps: evaluating each influence factor by a fuzzy comprehensive evaluation method, setting each evaluation index of the construction period quota influence, calculating the weight of each evaluation index according to an analytic hierarchy process, and scoring each evaluation index of each influence factor by using a Delphi method to obtain the evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes;

and carrying out construction period quota measurement and calculation according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors.

Optionally, in the setting of the influence factors influencing the construction period according to the construction content, the influence factors specifically include:

the method comprises the following steps of project type, project scale, terrain and geological conditions, management factors, construction methods, climate factors, participating units, social factors and policy factors.

Optionally, in the setting of each evaluation index affected by the construction period quota, the evaluation index at least includes:

influence degree, occurrence probability, index quantization index and differentiation index.

Optionally, the engineering parameters of the target power transmission and transformation construction project include:

the type, voltage grade and construction scale of a transformer substation in a power transformation project;

loop number, voltage grade, terrain distribution, geological conditions and engineering scale in the overhead line engineering;

voltage class, project type, geological conditions, project scale in cable line engineering.

Optionally, the calculating the weight of each evaluation index according to an analytic hierarchy process includes:

establishing a hierarchical structure model and constructing a judgment matrix;

and respectively carrying out hierarchical single sequencing and consistency check, hierarchical total sequencing and consistency check on the weight of each evaluation index.

Optionally, the constructing the determination matrix includes:

and introducing a 1-9 scaling method to construct a judgment matrix.

Optionally, the determining the construction content in the target power transmission and transformation construction project includes:

the construction content of the power transformation project comprises construction of a building project and construction of an installation project;

the construction content of the overhead line engineering comprises earth excavation, foundation engineering, tower assembling engineering and overhead line accessory engineering;

the construction content of the cable line engineering comprises construction of structures, cable laying, installation of cable accessories, cable testing and debugging.

Optionally, the obtaining an evaluation result of each influencing factor further includes:

and normalizing the evaluation result of each influence factor.

In a second aspect, a quota calculating system for a construction period of a power transmission and transformation project is provided, the system comprising:

the determining module is used for determining construction contents in the target power transmission and transformation construction project; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering;

the evaluation module is used for setting influence factors influencing the construction period according to the construction content and screening the influence factors to obtain key influence factors; the method for screening the influence factors to obtain the key influence factors specifically comprises the following steps: evaluating each influence factor by a fuzzy comprehensive evaluation method, setting each evaluation index of the construction period quota influence, calculating the weight of each evaluation index according to an analytic hierarchy process, and scoring each evaluation index of each influence factor by using a Delphi method to obtain the evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes;

and the measuring and calculating module is used for carrying out construction period quota measuring and calculating according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors.

According to the technical scheme provided by the embodiment of the application, the construction content in the target power transmission and transformation construction project is determined; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering; then, according to the construction content, setting influence factors influencing the construction period, and screening each influence factor to obtain key influence factors; and finally, carrying out rated calculation of the construction period according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors. Therefore, the accuracy of the existing quota measurement on the construction period of the power transmission and transformation project is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.

Fig. 1 is a flow chart of rated calculation of a construction period of a power transmission and transformation project according to an embodiment of the present disclosure;

fig. 2 is a flow chart of overhead line engineering construction according to an embodiment of the present disclosure;

fig. 3 is a cable route engineering construction flowchart according to an embodiment provided in the present application.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Specifically, please refer to fig. 1, which shows a flowchart of a method for rated measurement and calculation of a construction period of a power transmission and transformation project according to an embodiment of the present application, where the method may include the following steps:

step 101, determining construction contents in a target power transmission and transformation construction project.

The power transmission and transformation construction engineering in the application mainly comprises power transformation engineering, overhead line engineering and cable line engineering.

The construction of the power transformation project comprises a building part and an installation part, and the specific composition is shown in the following table 1.

TABLE 1

The overhead line engineering mainly comprises earth excavation, foundation engineering, tower assembling engineering and overhead line accessory engineering, and the specific construction process is shown in figure 2.

The cable line engineering construction mainly comprises construction of structures, cable laying, installation of cable accessories, testing, debugging and the like, and the specific construction flow is shown in fig. 3.

And 102, setting influence factors influencing the construction period according to the construction content, and screening the influence factors to obtain key influence factors.

In the embodiment of the present application, the screening of each influence factor to obtain a key influence factor specifically includes: evaluating each influence factor by a fuzzy comprehensive evaluation method, setting each evaluation index of the rating influence of the construction period, calculating the weight of each evaluation index according to an analytic hierarchy process, and scoring each evaluation index of each influence factor by using a Delphi method to obtain the evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes.

Specifically, the factors influencing the construction period specifically include:

(1) type of engineering

The power transmission and transformation project can be generally divided into a power transformation project, an overhead line project and a cable line project, but the power transformation project can be divided into an indoor station, an outdoor station, an underground station, a converter station and the like, the overhead line can also be divided into a conventional line and a large-span project from different angles, or divided into a single loop, a double loop and the like according to the number of loops, the cable project can also be divided into a direct-buried cable, a channel cable, a tunnel and the like according to different structural forms or construction modes, and the workload and the construction difficulty of different project types are different, so that the construction period is influenced.

(2) Engineering scale

For the same type, the voltage classes can be divided into different voltage classes, in the current power transmission and transformation project, the voltage class of the alternating current project is 35 kV-1000 kV, the voltage class of the direct current project is +/-200 kV-1100 kV, and the voltage class can be further divided into different capacity and different line lengths under the same voltage class.

(3) Topographic and geological conditions

For line engineering of power transmission and transformation engineering, the battle lines are long and wide in distribution, various terrain and geological conditions can be met, the land, hilly land, mountain land, sharp mountain, mud and marsh, river network and desert are divided according to the current rating and pricing basis, and common soil, firm soil, loose gravel, rock, muddy water, quicksand, dry sand, water pits and the like are divided geologically. The topography primarily influences the transport of the plant material, while the geology has a decisive influence on the basic form of the foundation work.

(4) Climate factor

The construction of power transmission and transformation projects, particularly overhead lines, is carried out outdoors, and is inevitably influenced by weather factors, particularly in winter and rain and other extreme weather conditions, so that on one hand, the working efficiency of constructors is reduced under the influence of the weather, and on the other hand, the construction site needs to increase time and take certain protection measures to deal with the change of the weather, and even directly stops working.

(5) Construction method

With the improvement of the mechanization level in China, new equipment and new methods applied to the power industry are diversified, the degree of mechanization construction is different, and the method has direct influence on the construction period.

(6) Management factors

Even if other conditions are the same, construction period differences can be caused by different construction management levels of each project, a good construction organization design can consider the characteristics of the project as far as possible, and by utilizing favorable factors, various working sequences are reasonably arranged, project funds are timely provided, materials and materials are timely provided, and the like, so that the construction period is reasonably arranged, and the construction cost is reasonably controlled.

(7) Participating in the construction unit

The construction unit comprises a construction management unit, a design unit, a supervision unit, an equipment manufacturer and the like, wherein the construction progress is delayed due to the fact that any link is in trouble, for example, the design is not reasonable enough, the auditing is not strict, the design unit needs to change the design frequently in the construction process, and even errors exist, so that the construction progress is delayed; equipment material suppliers cannot supply equipment materials within contractual agreed time due to heavy production tasks, or the supplied equipment materials have quality problems and directly influence construction progress.

(8) Social factors

The social factors are factors influencing project progress caused by different regional human social environments in the process of developing a power transmission and transformation project, and in the project construction process, besides the permanent land characteristics coordinated by owners, peripheral land must be temporarily occupied for construction operation. This inevitably damages the surrounding environment and the growth of crops by local farmers. The temporary land occupation and the young seedlings must be compensated. Because the places where the lines pass through are suburbs mostly, local common people are highly conscious of law, the required compensation standard is too high, the compensation amount cannot be later mentioned, and the local common people can often encounter the local common people to go to the site to be blocked, so that the construction is influenced. Therefore, a great deal of inconvenience is brought to construction, and the construction period is influenced.

(9) Policy factors

The policy factors refer to progress influence factors which are faced by communicating with government departments and handling various government approval documents and procedures in the process of developing the power transmission and transformation project, such as government batch approval after agricultural transfer request, handling of agricultural transfer approval, approval of red line agreement, handling of forest harvesting permit, land use approval documents related to all levels of governments and the like. In addition, there are important activities and important items.

The influence factors of the construction period of the power transmission and transformation project are more, but for the establishment of the construction period quota, all factors cannot be considered one by one for dividing the construction period, and then key factors are screened from the quota to serve as factors for setting the construction period subdirectory. And (3) carrying out importance degree measurement sequencing on each influence factor by combining the identified influence factors through a fuzzy comprehensive evaluation method, an analytic hierarchy process and a Delphi method, and taking the main influence factors with larger importance degrees.

Fuzzy comprehensive evaluation method

The fuzzy comprehensive evaluation method is a comprehensive evaluation method based on fuzzy mathematics. The comprehensive evaluation method converts qualitative evaluation into quantitative evaluation according to the membership theory of fuzzy mathematics, namely, fuzzy mathematics is used for making overall evaluation on objects or objects restricted by various factors. The method has the characteristics of clear result and strong systematicness, can better solve the problems of fuzziness and difficult quantization, and is suitable for solving various non-determinacy problems.

1) First, factor domains of evaluation objects are determined

P evaluation indexes may be set, U ═ U1, U2 … …, up };

2) determining comment level discourse domain

Let V ═ V1, V2, … …, vp }, and each level may correspond to a fuzzy subset, i.e., a set of levels.

3) Establishing a fuzzy relationship matrix

After the level fuzzy subset is constructed, the evaluated object is quantized from each factor ui (i ═ 1,2, … …, p) one by one, namely the membership (R | ui) of the evaluated object to the level fuzzy subset is determined from a single factor, and then a fuzzy relation matrix is obtained, as follows:

wherein, the ith row and the jth column element rij represent the degree of membership of a certain evaluated object ui to the vj level fuzzy subset from the viewpoint of factors.

4) Determining weight vectors for evaluation factors

In fuzzy comprehensive evaluation, determining a weight vector of an evaluation factor: w ═ a1, a2, … …, ap), the relative order of importance between the evaluation indices was determined generally by using an analytic hierarchy process. The weight coefficients are thus determined and normalized before synthesis.

5) Synthesizing fuzzy comprehensive evaluation result vector

Synthesizing W with R of each evaluated object to obtain a fuzzy comprehensive evaluation vector B of each evaluated object, namely:

wherein bi represents the degree of membership of the evaluated object to the vj hierarchical fuzzy subset as a whole.

6) And finally, analyzing the fuzzy comprehensive evaluation result vector to obtain a conclusion.

Analytic hierarchy process

Analytic Hierarchy Process (AHP) is a systematic, hierarchical analysis method that combines qualitative and quantitative analysis. The method is characterized in that on the basis of deeply researching the essence, influencing factors, internal relations and the like of the complex decision problem, the thinking process of the decision is made to be mathematical by using less quantitative information, so that the simple decision method is provided for the complex decision problem with multiple targets, multiple criteria or no structural characteristics. Are models and methods for making decisions on complex systems that are difficult to quantify completely.

The steps of the analytic hierarchy process can be roughly divided into the following four steps when the analytic hierarchy process is used for constructing the system model:

1) building a hierarchical model

In a hierarchical hierarchy, the number of levels generally depends on the complexity of the problem and the level of detail that needs to be analyzed. In the same layer, the number of the contained elements is not more than 9, and the contained elements are too many, which brings difficulty to comparison of two elements.

2) Construction judgment (pairwise comparison) matrix

The information of the hierarchical analysis is mainly that people judge the relative importance of each factor in each layer, and the judgment matrix is formed by introducing proper scales for quantification. To quantify the judgment, the examples of this application incorporate the Delphi method, as set forth in Table 2, with reference to the 1-9 scale proposed by Saaty.

TABLE 2 nine-level Scale values and meanings for the hierarchy

3) Hierarchical single ordering and consistency check thereof

The hierarchical single ordering is to calculate the relative importance weight of a certain hierarchical factor relative to a certain factor in the previous hierarchical according to the judgment matrix. The factors of the previous layer can be used as the criterion for comparing and judging the factors of the next layer. A series of judgment matrixes can be made, so that the relative importance weight of the next-level factor relative to the previous-level factor is calculated.

4) Hierarchical total ordering and consistency check thereof

The total hierarchical ranking refers to the importance weight of all factors or indexes of a certain hierarchy relative to the highest layer (the total target layer). And calculating layer by layer from top to bottom along the hierarchical structure in sequence, namely calculating the relative importance weight or the priority ranking (ranking weight vector) of the factors of the lowest layer relative to the factors of the highest layer, and selecting the scheme. The factor of the first three of the weighted reordering is taken as a main influence factor in the selection.

The Delphi (Delphi) method is a method which takes an expert as a target for asking information, and relies on the knowledge and experience of the expert to judge, evaluate and predict problems through investigation and research. Most of the factors influencing the construction period cannot be quantified, and the scoring is carried out according to expert experience.

In the screening of the rating influence factors of the construction period, the following four aspects are mainly considered:

(1) the degree of influence. The degree of influence is the primary factor to be considered when setting up the construction period subdirectory.

(2) The frequency of occurrence. For the factors which rarely occur, although the influence degree is high, the use frequency is low, so that the subdirectory is not required to be separately set.

(3) And (5) index quantification. The construction period quota is used as a guide standard to be specific and definite and must be quantifiable.

(4) And (4) differentiation. If the difference between the listed factors is not high in different projects, the necessity of listing the listed factors as subdivisions with different quota is lacked.

The four contents are taken as evaluation indexes in comprehensive evaluation, the weights of the four evaluation indexes are calculated by an analytic hierarchy process, and a judgment matrix is as the following table 3:

TABLE 3

W＝(0.4235，0.1294，0.2471，0.2000)

The evaluated influencing factors are scored using the delphi method.

TABLE 4

Through calculation, the evaluation result of each influence factor is as follows:

B＝(0.1495，0.1488，0.1302，0.0903，0.1151，0.1051，0.0816，0.0932， 0.0862)

according to the evaluation result, three indexes with the highest influence degree are selected as main basis when the construction period quota is set, wherein the three indexes mainly comprise the project type, the project scale and the topographic and geological conditions, and other influence factors are explained in the use description. However, the three influencing factors include contents, so that the specific engineering parameters are further analyzed, the project period quota sub-catalog is specified, and a project period quota measuring and calculating result is obtained.

And 104, carrying out construction period quota measurement and calculation according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors.

In the embodiment of the application, a specific construction period quota subdirectory is formulated for a certain area, and actual data corresponding to engineering parameters of the construction period quota subdirectory is obtained to carry out construction period quota measurement.

Specifically, the transformation project mainly comprises an indoor station and an outdoor station, and the outdoor station project has 78 sample volumes, and the occupation ratio is up to 91%. The voltage grades are 35kV, 110kV, 220kV, 330kV and 750kV respectively.

In the overhead line engineering, the total length of the overhead line engineering path is 1555.94km, wherein the length of a single-loop engineering path is 722km, the percentage is 46.4%, the length of a double-loop engineering path is 823km, the percentage is 52.94%, in addition, 2 sections of 4-loop lines are provided, the percentage of the path is 0.66%, the number of the overhead line engineering is 87, the voltage levels are respectively 35kV, 110kV, 220kV, 330kV and 750kV, the overhead line engineering totally relates to 6 terrains, namely flat ground, hills, river networks, mudflats, mountains and deserts, and the proportions of the flat ground, hills and mountains are the highest, namely 51%, 30% and 12%. The total of 7 geologies are respectively common soil, firm soil, loose sand stone, a water pit, a muddy water pit, a drift sand pit and rock, and the proportion of the common soil, the loose sand stone and the drift sand pit is the highest and is respectively 37%, 25% and 20%.

In cable line engineering, 18 cable line engineering items comprise 35kV and 110kV voltage grades and a total length 23816m, and the cable line engineering items are divided into four types, namely a tunnel, a buried pipe, a cable trench and a direct burial. The cable trench 12518m accounts for 53%, the direct-buried engineering whole field 6024m accounts for 25%, the buried pipe engineering 5078m accounts for 21%, the tunnel engineering 1 item is divided into three types of calandria, stay pipes and push pipes, the length 196m is an open tunnel, and the tunnel relates to 5 kinds of geology, wherein the geology respectively comprises common soil, dry sand, quicksand, gravel and loose sand, and the proportions of the quicksand pit and the common soil are the highest, and are respectively 46% and 38%.

The rated measurement and calculation of the construction period of the transformer substation project specifically comprises the following steps:

the resource investment is definite, the resource investment has great influence on the construction period, but under the condition of a reasonable construction period, each construction unit can configure the resource investment according to the principle of maximizing benefits, so that the optimal resource investment can be planned and configured according to different engineering scales when the construction period is measured and calculated. The resource investment here mainly refers to human resources and mechanical equipment resources

And (3) making a working plan, and making a corresponding construction network plan by each construction unit before construction according to the overall progress requirement and respective resource conditions, wherein the node time of main or key work is specified and is a main reference basis for making a construction period quota.

The construction period is measured, and the following principle is set during rated measurement of the construction period of the transformer substation:

(1) the construction period of the power transformation project is considered according to a new project, and the extension project is adjusted in the explanation.

(2) Outdoor substation engineering is considered according to the concrete frame structure, and indoor substation engineering is considered according to the steel structure.

(3) Indoor substation engineering is considered indoors all over.

(4) Comprehensively considering system communication engineering construction period in quota

According to the principle, the measurement and calculation of the construction period are carried out on the basis of certain resource allocation and a reasonable construction plan. And comparing the planned construction period of the measurement with the construction period quota with the specification of the 2012 edition, and comparing the result as shown in the table 5.

TABLE 5

From the comparison, the calculation construction period of the 35kV transformer station is greater than the qualification construction period of the 2012 edition, the factors such as the limitation of the construction site of the outdoor transformer station with the low voltage class and the like are comprehensively considered, the planned construction period is 7 months, and the total extension of the planned construction period is 0.5 month compared with the qualification construction period level of the 12 edition. The planned construction period of the 110kV transformer substation is basically consistent with the 2012-version rated construction period, the planned construction period is 9.5-10 months, and the total period is shortened by 1.5-2 months compared with the 12-version rating. The planned construction period of the 220kV transformer substation is calculated and calculated to be about 3 months shorter than the rated construction period of the 2012 edition, the conditions such as construction technology process progress are comprehensively considered, and the planned construction period is 12-12.5 months. The planned construction period of the 330kV transformer substation is about 4 months shorter than that of the 2012 standard construction period, and the planned construction period is 15.5-16 months. The project time of a 750kV transformer substation sample is about 3-4 months shorter than the quota time of 12 editions, and the actual overall project time is about 21-23 months.

Quota measurement and calculation for construction period of overhead line engineering

The following principle is set during the rated measurement and calculation of the construction period of the overhead line project:

when the total construction period is calculated, cross operation is not considered below 30km of each level of lines with the line voltages of 35kV, 110kV and 220kV, other operations are carried out according to a basic group tower and an iron tower transfer line, and the operation is carried out after 70% of the operation of the previous operation is finished and then the operation is carried out on the next operation.

Before the basic process begins, necessary working time such as preparation for road repair and the like is considered in advance for a certain time according to the needs of various terrains, and cableway transportation is considered for terrain transportation of mountains and sharp mountains.

The land, paddy field and hilly land are mechanically operated according to the foundation and the vertical tower, manual operation is mainly considered under other geological conditions of the land and the paddy field, and the combination of blasting and manual operation is uniformly considered for non-hard rocks and hard rocks.

Most of the foundations of the river network swamps consider that cast-in-place piles are provided with connecting beams, and after pile foundations are finished, pile head breaking, pile foundation detection and connecting beam reinforcement binding formwork pouring time are needed.

The method is characterized in that the line is laid out by tension on the line with the voltage grade of more than 110kV, 1 set of line laying equipment and personnel are arranged according to the length of 50 kilometers and less in the line laying operation, a line production organization mode is adopted, and one set of line laying equipment and personnel are added every 30-50 kilometers in the subsequent process.

Under the same terrain and geological conditions, the influence on the construction period is only considered to increase the construction period of the basic stage, and the influence on materials, tool transportation and working time of personnel due to terrain factors is only considered in 3 procedures. And the tower assembling and stringing processes are considered to correspondingly increase the maintenance, defect elimination and acceptance inspection time of a construction unit.

During measurement, the construction in a non-residential area is considered.

The crossing number in overhead construction is considered within 30% of the construction section line according to the sum of the crossing span. The change conditions under different engineering characteristics are inconsistent, and on the whole, the change value of the calculation construction period of the 35kV single-loop overhead line engineering is-1 month compared with the historical quota construction period; the variation value of the measuring and calculating construction period of the 110kV single-loop overhead line project is-1-0.5 month compared with the historical quota construction period; the variation value of the measuring and calculating construction period of the 220kV single-circuit overhead line project is-2-0.5 month compared with the historical quota construction period; the variation value of the measuring and calculating construction period of the 330kV single-loop overhead line project is-2.5-1 month compared with the historical quota construction period; the work period of the 750kV single-circuit overhead line project is-4-1 month longer than the work period variation value of the historical quota; the variation value of the measuring and calculating construction period of the 35kV double-loop overhead line project is 0-3 months compared with the historical quota construction period; the variation value of the project measuring and calculating construction period of the 220kV double-loop overhead line is-2.5-0 months compared with the historical quota construction period.

Regarding the rated measurement and calculation of the construction period of the cable line project, the following principles are set during the rated measurement and calculation of the construction period of the cable line project:

the direct burial is carried out according to the width of a ditch of 0.4-1.4 m, the cable burying is more than or equal to 0.7 m, 500m is taken as a standard section, 1 team is carried out on the standard section, the personnel and the machinery of 1 civil engineering team are configured below 5km, and the personnel and the machinery of 2 civil engineering teams are configured below 10 km. The 110kV allows for the appropriate addition of personnel without changing the team configuration.

The cable trench is divided into two groups, 4 groups and 30m group flowing water sections according to the section of 3.57m2(2.1m by 1.7m), the excavation depth of 2m and normal slope relief, wherein 2.5km is taken as a standard section, and each standard section is in default parallel operation. The 35kV cable trench is considered within 5km by 4 teams, the 110kV cable trench is considered within 5km by 4 teams, and the 10km by 6 teams.

Pipe laying 2X 8 holes according to section

And (4) normally putting slope, taking 1km as a standard section, taking 1 team of the standard section, taking a calandria and 1 operation well of each 50 meters as a flowing water section, covering the length of the joint working well in the civil engineering construction period of 1km without taking additional consideration, and performing parallel operation on each standard section by default. The civil engineering resource allocation of the buried cable project is more.

The electric part of the cable: because the direct burial, cable trench and buried pipe cable line projects are different only in civil engineering environment, the electrical construction has no great difference and is considered according to the unified standard. And when the total construction period is calculated, according to the construction cycle characteristics and the actual conditions of field construction of 35kV and 110kV cable laying and accessory installation, the 35kV and 110kV cable laying is taken as a key line influencing the total construction period. The direct-buried cable line project meets the total construction period of electrical synchronous construction consideration of more than 70% according to the civil engineering 7-day strength, and the electrical construction consideration is started after the national general conditions of the cable trench and buried cable line project are analyzed and the acceptance is completed according to the civil engineering completion. For a long-distance cable test, a plurality of sets of equipment are required to be connected in series and in parallel, joint debugging time is considered when rating is formulated, and the condition that a 2-side GIS test casing pipe is insufficient is not considered when rating is formulated.

Generally speaking, the variation value of the cable line direct-buried project measuring and calculating construction period is-2-1 month compared with the historical quota construction period; the cable line cable trench project measuring and calculating construction periods are higher than the historical quota construction period, and the variation value is 2.5-5 months; the measuring and calculating periods of the cable line buried pipe project are lower than the historical quota period, and the variation value is-2-0 months.

The embodiment of the application further provides a quota measuring and calculating system for the construction period of the power transmission and transformation project. The system comprises:

the determining module is used for determining evaluation indexes of the influence of the rated duty in the working period in the target power transmission and transformation construction engineering, wherein the evaluation indexes at least comprise influence degree, occurrence probability, index quantification indexes and differentiation indexes;

the weight calculation module is used for calculating the weight of the evaluation indexes according to an analytic hierarchy process to obtain the weight ratio among the evaluation indexes;

the evaluation calculation module is used for setting a plurality of influence factors of the construction period, and scoring each evaluation index of each influence factor by using a Delphi method to obtain an evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes;

and the construction period quota measuring and calculating module is used for carrying out construction period quota measuring and calculating according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the evaluation results of a plurality of influence factors.

In an optional embodiment of the present application, the processing module is specifically configured to: selecting indexes of a credit subject from the index item scores of all index items according to the real service characteristics of the application scene, and calculating the weight values of all index items; and calculating the integrity score of the enterprise to be tested by using the obtained weight values of the index items and the index item scores.

The system for measuring and calculating the quota for the construction period of the power transmission and transformation project, provided by the embodiment of the application, is used for realizing the method for measuring and calculating the quota for the construction period of the power transmission and transformation project, and specific limitations of the system for measuring and calculating the quota for the construction period of the power transmission and transformation project can be referred to the limitations on the method for measuring and calculating the quota for the construction period of the power transmission and transformation project, and are not repeated herein. All parts of the rated measuring and calculating system for the construction period of the power transmission and transformation project can be completely or partially realized through software, hardware and a combination of the software and the hardware. The modules can be embedded in a hardware form or independent from a processor in the device, and can also be stored in a memory in the device in a software form, so that the processor can call and execute operations corresponding to the modules.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A quota measuring and calculating method for a construction period of a power transmission and transformation project is characterized by comprising the following steps:

determining construction contents in a target power transmission and transformation construction project; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering;

setting influence factors influencing the construction period according to the construction content, and screening each influence factor to obtain key influence factors;

the method for screening the influence factors to obtain the key influence factors specifically comprises the following steps: evaluating each influence factor by a fuzzy comprehensive evaluation method, setting each evaluation index of the construction period quota influence, calculating the weight of each evaluation index according to an analytic hierarchy process, and scoring each evaluation index of each influence factor by using a Delphi method to obtain the evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes;

and performing rated calculation of the construction period according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors.

2. The method according to claim 1, wherein the setting of the influence factors affecting the construction period according to the construction content specifically comprises:

the method comprises the following steps of project type, project scale, terrain and geological conditions, management factors, construction methods, climate factors, participating units, social factors and policy factors.

3. The method according to claim 1, wherein the setting of the evaluation indexes affected by the construction period quota at least comprises the following steps:

the influence degree, the occurrence probability, the index quantization index and the differentiation index.

4. The method of claim 1, wherein the project parameters of the target power transmission and transformation construction project comprise:

the type, voltage grade and construction scale of a transformer substation in a power transformation project;

loop number, voltage grade, terrain distribution, geological conditions and engineering scale in the overhead line engineering;

voltage class, project type, geological conditions, project scale in cable line engineering.

5. The method of claim 1, wherein the calculating the weight of each evaluation index according to an analytic hierarchy process comprises:

establishing a hierarchical structure model and constructing a judgment matrix;

and respectively carrying out hierarchical single sequencing and consistency check, hierarchical total sequencing and consistency check on the weight of each evaluation index.

6. The method of claim 5, wherein constructing the decision matrix comprises:

and introducing a 1-9 scaling method to construct a judgment matrix.

7. The method according to claim 1, wherein the determining of the construction content in the target power transmission and transformation construction project comprises:

the construction content of the power transformation project comprises construction of a building project and construction of an installation project;

the construction content of the overhead line engineering comprises earth excavation, foundation engineering, tower assembling engineering and overhead line accessory engineering;

the construction content of the cable line engineering comprises construction of structures, cable laying, installation of cable accessories, cable testing and debugging.

8. The method of claim 1, wherein obtaining the evaluation result of each influencing factor further comprises:

and normalizing the evaluation result of each influence factor.

9. The utility model provides a power transmission and transformation project construction period quota measurement system which characterized in that, the system includes:

the determining module is used for determining construction contents in the target power transmission and transformation construction project; the target power transmission and transformation construction engineering comprises power transformation engineering, overhead line engineering and cable line engineering;

the evaluation module is used for setting influence factors influencing the construction period according to the construction content and screening the influence factors to obtain key influence factors; the method for screening the influence factors to obtain the key influence factors specifically comprises the following steps: evaluating each influence factor by a fuzzy comprehensive evaluation method, setting each evaluation index of the construction period quota influence, calculating the weight of each evaluation index according to an analytic hierarchy process, and scoring each evaluation index of each influence factor by using a Delphi method to obtain the evaluation result of each influence factor, wherein each influence factor comprises all the evaluation indexes;

and the measuring and calculating module is used for carrying out construction period quota measuring and calculating according to actual data corresponding to the engineering parameters of the target power transmission and transformation construction engineering and the obtained key influence factors.

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