CN116258389B - Carbon emission evaluation method and system in reinforced concrete segment production stage - Google Patents
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Abstract
The invention discloses a carbon emission evaluation method and a system in a reinforced concrete segment production stage, wherein the evaluation method comprises the following steps: s1, collecting related data of carbon emission accounting in a production stage of reinforced concrete segments of tunnel construction projects of various scales and types, classifying the related data according to a building material production stage, a building material transportation stage and a prefabrication forming stage, and constructing a carbon emission unified calculation model and an analysis evaluation model of the carbon emission set of the reinforced concrete segments; and S2, collecting evaluation index data of the tunnel construction project to be evaluated according to the characteristics of the tunnel construction projects of the same type and scale, and performing overall systematic evaluation of the carbon emission amount on the analysis and evaluation model by adopting the reinforced concrete segment carbon emission set in the step S1. The evaluation method is used for carrying out post-evaluation on the carbon emission of the completed project and low-carbon design reference of the new project, so as to dynamically and accurately evaluate the carbon emission level of the tunnel construction reinforced concrete pipe sheet in the production stage.
Description
Technical Field
The invention belongs to the technical field of carbon emission evaluation, and particularly relates to a carbon emission evaluation method and system in a reinforced concrete pipe sheet production stage.
Background
According to the data of China department of transportation, the business mileage of the national railway reaches 15 ten thousand km, wherein the business mileage of the high-speed railway reaches 4 ten thousand km; the double-line rate is 59.5%; the electrochemical rate is 73.3%; the business mileage of the western region is 6.1 ten thousand km. National railway network density 156.7 km/ten thousand km 2 . The rapid development of the transportation industry brings about not only rapid economic growth but also the consequent environmental problems. Comparing the whole life cycle building material production stage, the building material transportation stage and the construction stage of the railway tunnel construction, the research finds that the carbon emission is maximum in the building material production stage,the reinforced concrete pipe piece is the link with the largest carbon emission in the building material production stage, and the overall emission reduction is quite considerable.
In the prior art, the current carbon emission evaluation system is mainly used in the industry with higher carbon emission, the monomer emission reduction amount in the tunnel construction field is smaller, a set of scientific tunnel construction carbon emission evaluation method and system are lacked, only the carbon emission research for the reinforced concrete segment production stage is very little, although a small amount of carbon emission evaluation systems for the building field exist on the market, the appointed standards are different due to different quantitative evaluation standards and different scales, and a unified measurement index is difficult to be suitable for the tunnel construction field, so the carbon emission evaluation method and system for the reinforced concrete segment production stage are provided.
Disclosure of Invention
The invention aims to provide a carbon emission evaluation method and a system in a reinforced concrete pipe piece production stage, which are used for carrying out post-evaluation on carbon emission of completed projects and low-carbon design reference of new projects so as to dynamically and accurately evaluate the carbon emission level in the tunnel construction reinforced concrete pipe piece production stage.
The invention adopts the following technical scheme: the carbon emission evaluation method in the reinforced concrete segment production stage comprises the following steps:
s1, collecting related data of carbon emission accounting in a production stage of reinforced concrete segments of tunnel construction projects of various scales and types, classifying the related data according to a building material production stage, a building material transportation stage and a prefabrication forming stage, and constructing a carbon emission unified calculation model and an analysis evaluation model of the carbon emission set of the reinforced concrete segments;
the carbon emission unified calculation model is used for calculating the carbon emission E of the building material production stage, the building material transportation stage and the prefabrication forming stage P 、E T And E is C The method comprises the steps of carrying out a first treatment on the surface of the Wherein:
the carbon emission of the building material production stage is obtained by the following formula:
wherein: q (Q) i The material consumption is the ith material consumption in the reinforced concrete segment production stage; f (F) i The carbon emission factor of the ith material in the reinforced concrete segment production stage; n is the building material type;
the carbon emission of the building material transportation stage is obtained by the following formula:
E T ＝E T，c +E T，j ；
wherein: e (E) T，c Carbon emissions generated during the transportation of concrete; e (E) T，j Carbon emissions generated during transportation of building materials excluding concrete; m is M c The consumption of the concrete with the i-th strength grade; w is the capacity of the concrete tank truck; q (Q) c Diesel consumption per kilometer of the concrete tank truck; d (D) c The concrete transportation distance is; f (F) c Is a diesel carbon emission factor; m is M z，j The weight of the j-th building material; d (D) j The transportation distance of the j-th building material; f (F) j Is the transportation mode carbon emission factor of the j-th building material of the transportation unit weight.
The carbon emission in the pre-forming stage is obtained by the following formula:
wherein: q (Q) t The consumption of the reinforced concrete pipe piece; e (E) t The energy consumption is the energy consumption for producing the reinforced concrete pipe piece in unit volume; f (F) t Is an energy carbon emission factor;
and S2, collecting evaluation index data of the tunnel construction project to be evaluated according to the characteristics of the tunnel construction projects of the same type and scale, and performing overall systematic evaluation of the carbon emission amount on the analysis and evaluation model by adopting the reinforced concrete segment carbon emission set in the step S1.
Above-mentionedThe step S2 further includes: workshop CO for collecting reinforced concrete segment production stage of tunnel construction project to be evaluated 2 Concentration, and CO is allowed by workshop 2 The concentration value sets a threshold value, at CO 2 And when the concentration is higher than the set threshold value, the buzzer alarms.
The qualitative index data in step S1 is evaluated at (0, 5) by the evaluation criterion.
In the step S1, an analytical evaluation model of the reinforced concrete segment carbon emission set is constructed as follows:
constructing an evaluation index system: a is that n ＝{x n }＝{x 1 ，x 2 ，…，x n }；
Calculating the carbon emission of each evaluation object in the building material production stage, the building material transportation stage and the prefabrication molding stage by using a carbon emission unified calculation model, and positioning the carbon emission as a qualitative index;
the quantitative index in the evaluation indexes is used for classifying the evaluation grades, and the evaluation grade standard B l = [ very small, generally large, very large]；
The reinforced concrete segment carbon emission set is analyzed and evaluated into a model: h= (a) n ，B l )；
The formula of the relation degree between the reinforced concrete pipe piece carbon emission set centering collection A, B is as follows:
wherein: k is the number of differential components, b 1 ，b 2 ，...b k I as a difference component 1 ，i 2 ，...i k A+b is the difference component coefficient 1 +b 2 +…+b k +c＝1；
a=s/N is the same degree, b=f/N is the degree of difference, c=p/N is the degree of opposition; i is a difference coefficient, and the value interval is (-1, 1); j is a opponent identification coefficient, and j= -1 in calculation;
calculating the comprehensive association degree of each evaluation object by combining the calculated association degree and the entropy weight of each evaluation index:
wherein: omega k The kth evaluation index weight is determined by adopting an entropy weight method;
judging the level of the evaluation object by adopting a confidence coefficient criterion:
h l ＝(f 1 +f 2 +…+f l )＞λ；
wherein,lambda is the confidence;
for a given lambda value, if h l > lambda and h l-1 And if lambda is less than or equal to lambda, the evaluation object is the I-grade carbon emission effect.
The above qualitative index evaluation grade criteria were rated as follows:
the invention discloses a carbon emission evaluation system in a reinforced concrete pipe piece production stage, which is used for evaluating carbon emission in the reinforced concrete pipe piece production stage and comprises the following steps: the system comprises a data acquisition module, a data storage module, a data classification module, a carbon emission calculation module, an analysis and evaluation module and a data display module; wherein:
the output end of the data acquisition module is connected with the input end of the data storage module, the output end of the data storage module is connected with the input end of the data classification module, the output end of the data classification module is connected with the input end of the carbon emission calculation module, the output end of the carbon emission calculation module is simultaneously connected with the input ends of the analysis evaluation module, the data storage module and the display module, and the output end of the analysis evaluation module is simultaneously connected with the input ends of the display module and the data storage module;
the data acquisition module is used for acquiring the related number of carbon emission accounting in the reinforced concrete segment production stageData related to tunnel construction projects of various scales and types, data related to carbon emission evaluation indexes and workshop CO in reinforced concrete segment production stage 2 Concentration standard;
the carbon emission calculation module is used for calculating the carbon emission of the reinforced concrete segment in the production stage through a carbon emission unified calculation model;
the data storage module is used for storing the data acquired by the data acquisition module and the carbon emission calculated by the carbon emission calculation module in the reinforced concrete segment production stage;
the data classification module is used for dividing the related data of the carbon emission accounting in the reinforced concrete segment production stage according to the target range of the carbon emission accounting in the reinforced concrete segment production stage;
and the analysis and evaluation module is used for regional detailed evaluation and overall systematic evaluation in the building material production stage.
Further, the analysis evaluation module includes: CO 2 The system comprises a concentration detector, an evaluation index screening unit, an evaluation system construction unit, an evaluation grade determining unit, a weight determining unit and an integrated analysis evaluation model unit;
CO 2 the concentration detector is used for displaying the actual carbon dioxide concentration value detected currently, and when the carbon dioxide concentration value is higher than a set threshold value, the buzzer alarms, otherwise, the buzzer does not alarm;
the evaluation index screening unit is used for screening the evaluation index and sending the evaluation index to the evaluation system construction unit;
the evaluation system construction unit is used for constructing a carbon emission evaluation index system in the reinforced concrete segment production stage;
and the evaluation grade determining unit is used for determining an evaluation index set and an evaluation grade set of the pair analysis according to the evaluation index system and the evaluation grade standard. The method comprises the steps of carrying out a first treatment on the surface of the
The weight determining unit is used for assigning weights through an entropy weight method;
and constructing an evaluation model unit, wherein the evaluation model unit is used for evaluating an index set and an evaluation grade set of the analysis according to the evaluation index system and the evaluation grade standard determination set.
The beneficial effects of the invention are as follows: 1. the method comprises the steps of collecting tunnel construction projects of various types and scales, screening evaluation indexes according to characteristics of newly built projects, constructing an evaluation index system, constructing a carbon emission set, analyzing and evaluating model, intuitively reflecting carbon emission conditions of the investigated projects, and reducing influence of human factors on carbon emission evaluation results, so that carbon emission evaluation in the reinforced concrete segment production stage is better carried out. 2. The target range of carbon emission calculation in the reinforced concrete segment production stage is divided into a building material production stage, a building material transportation stage and a prefabrication molding stage, and the evaluation content is more comprehensive. 3. The analysis evaluation module comprises regional detailed evaluation and overall system evaluation of an analysis evaluation model, and sends an evaluation result to the display module, so that the evaluation level is richer through the combined evaluation of the regional detailed evaluation and the overall system evaluation of the analysis evaluation model.
Drawings
FIG. 1 is a block diagram of a carbon emission evaluation system in the production stage of reinforced concrete segments according to the invention;
FIG. 2 is a block diagram of an analysis and evaluation module of a reinforced concrete segment production stage carbon emission evaluation system according to the present invention;
wherein: 6. a data acquisition module; 7. a data storage module; 8. a data classification module; 9. a carbon emission calculation module; 10. an analysis and evaluation module; 11. a data display module; CO 2 A concentration detector; 102. an evaluation index screening unit; 103. an evaluation system construction unit; 104. an evaluation level determination unit; 105. a weight determining unit; 106. the set analyzes and evaluates the model unit.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention relates to a carbon emission evaluation method in a reinforced concrete segment production stage, which comprises the following steps:
s1, collecting related data of carbon emission accounting in a production stage of reinforced concrete segments of tunnel construction projects of various scales and types, classifying the related data according to a building material production stage, a building material transportation stage and a prefabrication forming stage, and constructing a carbon emission unified calculation model and an analysis evaluation model of the carbon emission set of the reinforced concrete segments;
the carbon emission unified calculation model is used for calculating the carbon emission E of the building material production stage, the building material transportation stage and the prefabrication forming stage P 、E T And E is C The method comprises the steps of carrying out a first treatment on the surface of the Wherein:
the carbon emission of the building material production stage is obtained by the following formula:
wherein: q (Q) i The material consumption is the ith material consumption in the reinforced concrete segment production stage; f (F) i The carbon emission factor of the ith material in the reinforced concrete segment production stage; n is the building material type;
the carbon emission of the building material transportation stage is obtained by the following formula:
E T ＝E T，c +E T，j ；
wherein: e (E) T，c Carbon emissions generated during the transportation of concrete; e (E) T，j Carbon emissions generated during transportation of building materials excluding concrete; m is M c The consumption of the concrete with the i-th strength grade; w is the capacity of the concrete tank truck; q (Q) c Diesel consumption per kilometer of the concrete tank truck; d (D) c The concrete transportation distance is; f (F) c Is a diesel carbon emission factor; m is M z，j The weight of the j-th building material; d (D) j The transportation distance of the j-th building material; f (F) j Is the transportation mode carbon emission factor of the j-th building material of the transportation unit weight.
The carbon emission in the pre-forming stage is obtained by the following formula:
wherein: q (Q) t The consumption of the reinforced concrete pipe piece; e (E) t The energy consumption is the energy consumption for producing the reinforced concrete pipe piece in unit volume; f (F) t Is an energy carbon emission factor;
and S2, collecting evaluation index data of the tunnel construction project to be evaluated according to the characteristics of the tunnel construction projects of the same type and scale, and performing overall systematic evaluation of the carbon emission amount on the analysis and evaluation model by adopting the reinforced concrete segment carbon emission set in the step S1.
The step S2 further includes: workshop CO for collecting reinforced concrete segment production stage of tunnel construction project to be evaluated 2 Concentration, and CO is allowed by workshop 2 The concentration value sets a threshold value, at CO 2 And when the concentration is higher than a set threshold value, the buzzer alarms, and regional detailed evaluation is carried out on the reinforced concrete segment prefabrication workshop.
The qualitative index data in step S1 is evaluated at (0, 5) by the evaluation criterion.
In the step S1, an analytical evaluation model of the reinforced concrete segment carbon emission set is constructed as follows:
constructing an evaluation index system: a is that n ＝{x n }＝{x 1 ，x 2 ，…，x n }；
The carbon emission unified calculation model is used for calculating the carbon emission of each evaluation object in the building material production stage, the building material transportation stage and the prefabrication molding stage, and the carbon emission total amount index has no mandatory regulation of related quota data and indexes, so that the carbon emission total amount index can be positioned as a qualitative index for evaluation, and the embodiment only records the actual carbon emission amount;
the quantitative index in the evaluation index classifies the evaluation grade according to the standard, and the evaluation grade standard B l = [ very small, generally large, very large]；
The reinforced concrete segment carbon emission set is analyzed and evaluated into a model: h= (a) n ，B l )；
The formula of the relation degree between the reinforced concrete pipe piece carbon emission set centering collection A, B is as follows:
wherein: k is the number of differential components, b 1 ，b 2 ，...b k I as a difference component 1 ，i 2 ，...i k A+b is the difference component coefficient 1 +b 2 +…+b k +c＝1；
a=s/N is the same degree, b=f/N is the degree of difference, c=p/N is the degree of opposition; i is a difference coefficient, and the value interval is (-1, 1); j is a opponent identification coefficient, and j= -1 in calculation;
calculating the comprehensive association degree of each evaluation object by combining the calculated association degree and the entropy weight of each evaluation index:
wherein: omega k The kth evaluation index weight is determined by adopting an entropy weight method;
judging the level of the evaluation object by adopting a confidence coefficient criterion:
h l ＝(f 1 +f 2 +…+f l )＞λ；
wherein,lambda is the confidence;
for a given lambda value, if h l > lambda and h l-1 And if lambda is less than or equal to lambda, the evaluation object is the I-grade carbon emission effect.
The above evaluation level criteria were rated as follows:
table 1 qualitative rating scale and rating scale
The invention also discloses a carbon emission evaluation system for the reinforced concrete pipe piece production stage, which is used for evaluating the carbon emission of the reinforced concrete pipe piece production stage, and as shown in figure 1, comprises the following steps: the system comprises a data acquisition module 6, a data storage module 7, a data classification module 8, a carbon emission calculation module 9, an analysis and evaluation module 10 and a data display module 11; wherein:
the output end of the data acquisition module 6 is connected with the input end of the data storage module 7, the output end of the data storage module 7 is connected with the input end of the data classification module 8, the output end of the data classification module 8 is connected with the input end of the carbon emission calculation module 9, the output end of the carbon emission calculation module 9 is simultaneously connected with the input ends of the analysis and evaluation module 10, the data storage module 7 and the display module 11, and the output end of the analysis and evaluation module 10 is simultaneously connected with the input ends of the display module 11 and the data storage module 7;
the data acquisition module 6 is used for acquiring data related to carbon emission accounting in the reinforced concrete segment production stage, data related to tunnel construction projects of various scales and types, data related to carbon emission evaluation indexes, and workshop CO in the reinforced concrete segment production stage 2 Concentration standard;
the carbon emission calculation module 9 is used for calculating the carbon emission of the reinforced concrete segment in the production stage through a carbon emission unified calculation model;
the data storage module 7 is used for storing the data acquired by the data acquisition module 6 and the carbon emission amount calculated by the carbon emission calculation module 9 in the reinforced concrete segment production stage;
the data classification module 8 is used for dividing the related data of the carbon emission accounting in the reinforced concrete segment production stage according to the target range of the carbon emission accounting in the reinforced concrete segment production stage;
the analysis and evaluation module 10 is used for regional detailed evaluation and overall systematic evaluation in the building material production stage.
As shown in fig. 2, the analysis evaluation module 10 includes: CO 2 A concentration detector 101, an evaluation index screening unit 102, an evaluation system construction unit 103, an evaluation level determination unit 104, a weight determination unit 105, and an aggregate analysis evaluation model unit 106;
CO 2 the concentration detector 101 is used for displaying the actual carbon dioxide concentration value detected currently, and when the carbon dioxide concentration value is higher than a set threshold value, the buzzer alarms, otherwise, the buzzer does not alarm; the highest allowable concentration of the workshop air carbon dioxide sanitary standard is 18000mg/m310000pm or 1%, and when the workshop concentration exceeds the threshold value, the buzzer alarms;
an evaluation index screening unit 102, configured to screen an evaluation index and send the evaluation index to an evaluation system construction unit 103;
an evaluation system construction unit 103 for constructing a carbon emission evaluation index system in the reinforced concrete segment production stage;
the evaluation level determining unit 104 is configured to determine an evaluation index set and an evaluation level set for analysis according to the evaluation index system and the evaluation level standard. The method comprises the steps of carrying out a first treatment on the surface of the
A weight determining unit 105 for assigning weights by an entropy weight method;
and the evaluation model unit 106 is configured to construct an evaluation index set and an evaluation grade set for analysis according to the evaluation index system and the evaluation grade standard determination set.
In order to verify the carbon emission evaluation method in the reinforced concrete segment production stage, an evaluation index in the reinforced concrete segment production stage of a certain project is selected, and the carbon emission total systematic evaluation is carried out on an analysis evaluation model by adopting a reinforced concrete segment carbon emission set.
TABLE 2 evaluation index system for production stage of reinforced concrete segment of certain engineering
The index layer of the index system for evaluation in this embodiment is a partial quantitative index evaluation example, and does not represent the constitution of the index system in the whole production stage.
Obtaining carbon emission of each ring pipe slice production stage according to the carbon emission calculation model, wherein the carbon emission ratio of the building material production stage is higher than that of the building material transportation stage and higher than that of the prefabrication molding stage;
TABLE 3 carbon emissions per Ring production stage of reinforced concrete segment
| Carbon emission metering range | Carbon emission (kgCO) 2 Ring(s) |
| Stage of building Material production (E) P ) | 8543.124 |
| Building material transportation stage (E) T ) | 246.352 |
| Prefabrication forming stage (E) C ) | 143.543 |
The evaluation index set is as follows: a is that 7 ＝{x 7 The method comprises the steps of } = { waste slag utilization rate, physical material consumption reduction rate, flying dust height, material localization rate, building material transportation distance, energy comprehensive consumption reduction rate and turnover material utilization rate }; the set of rating levels is: b (B) 5 = { extremely small, generally large, extremely large };
calculating the analysis relation degree of each evaluation object set:
where S represents where there are S index values in the evaluation objectStandard class I (minimum), F 1 ；F 2 ；F 3 The index values are respectively the evaluation index numbers with II, III, IV-level standard, and the P evaluation index values are in V-level standard (maximum);
then set pair h= (a) 7 ，B 5 ) The relationship between the sets A, B is formulated as follows:
the similarity of the set pair is expressed by the magnitude of the relation degree calculation result, and the carbon emission effect can be primarily judged;
according to the basic relation degree expression of two evaluation objects, namely a first tunnel and a second tunnel, preliminarily judging that the carbon emission degree of each ring of reinforced concrete pipe sheet is less than that of the first tunnel;
analyzing by further collecting the relation degree between the specific actual measurement value of the evaluation index and the evaluation grading standard;
tunnel one:
u 1-1 ＝0+0i 1 +0.9333i 2 +0.0667i 3 +0j u 1-2 ＝0+0i 1 +0i 2 +0.0267i 3 +o.9733j；
u 1-3 ＝0+0.7143i 1 +0.2857i 2 +0i 3 +0j u 1-4 ＝0.52+0.48i 1 +0i 2 +0i 3 +0j；
u 1-5 ＝0.144+0.856i 1 +0i2+0i 3 +0j u 1-6 ＝0+0i 1 +0.8i 2 +0.2i 3 +0j；
u 1-7 ＝0+0.04i 1 +0.96i 2 +0i 3 +0j；
tunnel two:
u2- 1 ＝0+0.14i 1 +0.86i 2 +0i 3 +0j u 2-2 ＝0+0i 1 +0i 2 +0.4933i a +0.5067j；
u 2-3 ＝0+0i 1 +0.8571i 2 +0.1429i 3 +0j u 2-4 ＝1+0i 1 +0i 2 +0i 3 +0j；
u 2-5 ＝1+0i 1 +0i 2 +0i 3 +0j u 2-6 ＝1+0i 1 +0i2+0i 3 +0j；
u 2-7 ＝0+0i 1 +0.18i 2 +0.82i 3 +0j；
calculating the comprehensive association degree of each evaluation object by combining the calculated association degree and the entropy weight of each evaluation index;
then
Wherein: omega k The kth evaluation index weight is determined by adopting an entropy weight method;
table 4 index layer objective weights
Judging the level of the evaluation object by adopting a confidence coefficient criterion:
h l ＝(f 1 +f 2 +…+f l )＞λ，(l＝1，2，...，5)；
wherein,lambda is the confidence levelTypically the value range is [0.5,0.7 ]]；
For a given lambda value, if h l > lambda and h l-1 And if lambda is less than or equal to lambda, the evaluation object is the I-grade carbon emission effect.
The confidence coefficient lambda of the embodiment is 0.6, and the carbon emission evaluation grade of each evaluation sample can be obtained, so that the influence degree of the tunnel I on the carbon emission is general, and the influence degree of the tunnel II on the carbon emission is general.
Claims (2)
1. The carbon emission evaluation method for the reinforced concrete segment production stage is characterized by comprising the following steps of:
s1, collecting related data of carbon emission accounting in a production stage of reinforced concrete segments of tunnel construction projects of various scales and types, classifying the related data according to a building material production stage, a building material transportation stage and a prefabrication forming stage, and constructing a carbon emission unified calculation model and an analysis evaluation model of the carbon emission set of the reinforced concrete segments;
the carbon emission unified calculation model is used for calculating the carbon emission E of the building material production stage, the building material transportation stage and the prefabrication forming stage P 、E T And E is C The method comprises the steps of carrying out a first treatment on the surface of the Wherein:
the carbon emission of the building material production stage is obtained by the following formula:
wherein: q (Q) i The material consumption is the ith material consumption in the reinforced concrete segment production stage; f (F) i The carbon emission factor of the ith material in the reinforced concrete segment production stage; n is the building material type;
the carbon emission of the building material transportation stage is obtained by the following formula:
E T ＝E T，c +E T，j ；
wherein: e (E) T，c Carbon emissions generated during the transportation of concrete; e (E) T，j Carbon emissions generated during transportation of building materials excluding concrete; m is M c The consumption of the concrete with the i-th strength grade; w is the capacity of the concrete tank truck; q (Q) c Diesel consumption per kilometer of the concrete tank truck; d (D) c The concrete transportation distance is; f (F) c Is a diesel carbon emission factor; m is M z，j The weight of the j-th building material; d (D) j The transportation distance of the j-th building material; f (F) j A transport mode carbon emission factor for transporting the j-th building material per unit weight;
the carbon emission in the pre-forming stage is obtained by the following formula:
wherein: q (Q) t The consumption of the reinforced concrete pipe piece; e (E) t The energy consumption is the energy consumption for producing the reinforced concrete pipe piece in unit volume; f (F) t Is an energy carbon emission factor;
s2, collecting evaluation index data of the tunnel construction project to be evaluated according to the characteristics of the tunnel construction projects of the same type and scale, and performing overall systematic evaluation of carbon emission on the analysis evaluation model by adopting the reinforced concrete segment carbon emission set in the step S1;
the step S2 further includes: workshop CO for collecting reinforced concrete segment production stage of tunnel construction project to be evaluated 2 Concentration, and CO is allowed by workshop 2 The concentration value sets a threshold value, at CO 2 When the concentration is higher than a set threshold value, the buzzer alarms;
in the step S1, an analytical evaluation model of the reinforced concrete segment carbon emission set is constructed as follows:
constructing an evaluation index system: a is that n ＝{x n }＝{x 1 ，x 2 ，…，x n }；
Calculating the carbon emission of each evaluation object in the building material production stage, the building material transportation stage and the prefabrication molding stage by using a carbon emission unified calculation model, and positioning the carbon emission as a qualitative index;
the quantitative index in the evaluation indexes is used for classifying the evaluation grades, and the evaluation grade standard B l = [ very small, generally large, very large]；
The reinforced concrete segment carbon emission set is analyzed and evaluated into a model: h= (a) n ，B l )；
The formula of the relation degree between the reinforced concrete pipe piece carbon emission set centering collection A, B is as follows:
wherein: k is the number of differential components, b 1 ，b 2 ，...b k I as a difference component 1 ，i 2 ，...i k A+b is the difference component coefficient 1 +b 2 +…+b k +c＝1；
a=s/N is the same degree, b=f/N is the degree of difference, c=p/N is the degree of opposition; i is a difference coefficient, and the value interval is (-1, 1); j is a opponent identification coefficient, and j= -1 in calculation;
calculating the comprehensive association degree of each evaluation object by combining the calculated association degree and the entropy weight of each evaluation index:
wherein: omega k The kth evaluation index weight is determined by adopting an entropy weight method;
judging the level of the evaluation object by adopting a confidence coefficient criterion:
h l ＝(f 1 +f 2 +…+f l )＞λ；
wherein,lambda is the confidence;
for a given lambda value, if h l > lambda and h l-1 And if lambda is less than or equal to lambda, the evaluation object is the I-grade carbon emission effect.
2. The method for evaluating carbon emission in the production stage of reinforced concrete segments according to claim 1, wherein the qualitative index data in the step S1 is evaluated at (0, 5) by an evaluation criterion.
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