Staged carbon emission prediction method and system based on road and bridge construction

Abstract

The invention discloses a periodic carbon emission prediction method and system based on road and bridge construction, relates to the technical field of carbon emission, and solves the problem that the carbon emission condition of most current road and bridge construction focuses on the evaluation of the carbon emission in the whole construction process, but the actual condition of the carbon emission in each construction stage cannot be accurately reflected. Therefore, main links and key factors of carbon emission are difficult to find accurately, and effective emission reduction measures cannot be formulated. The method comprises the following steps: analyzing predicted carbon emissions of roads and bridges in different construction stages; analyzing the carbon sequestration amount of the road and bridge in different construction stages; based on the carbon emissions and the carbon sequestration amounts in different construction stages, analyzing the actual carbon emissions of the road and the bridge in different construction stages; according to the method, the actual carbon emission is accurately calculated by analyzing the carbon emission and the carbon sink of each construction stage of the road and the bridge, so that optimization of design and construction is facilitated, environmental influence is reduced, sustainable development is promoted, and the environmental protection performance of road and bridge engineering is improved.

Description

Technical Field

[0001] The present invention belongs to the field of carbon emissions, and specifically relates to a method and system for predicting phased carbon emissions in road and bridge construction. Background Art

[0002] With the acceleration of the global urbanization process, infrastructure construction, especially road and bridge construction, has become an important part of the development of various countries. However, a large amount of carbon emissions will inevitably be generated during this process, which has an impact on the environment. Therefore, how to accurately predict and effectively control the carbon emissions during road and bridge construction has become a hot issue in current research.

[0003] Currently, most of the carbon emission assessment problems in road and bridge construction mainly focus on the assessment of the carbon emissions generated during the entire construction process of road and bridge construction, and often cannot accurately reflect the actual carbon emissions in each stage. Road and bridge construction includes three stages: material production, material transportation, and on-site construction. The sources of carbon emissions and carbon sinks are different in each stage. If each stage is not subdivided and evaluated separately, it is difficult to accurately identify the main links and key factors of carbon emissions, and thus it is impossible to formulate effective emission reduction measures. Therefore, the present invention provides a method and system for predicting phased carbon emissions in road and bridge construction. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art; for this purpose, the present invention proposes a method and system for predicting phased carbon emissions in road and bridge construction, which is used to solve the technical problem that most of the current carbon emission situations in road and bridge construction focus on the assessment of the carbon emissions during the entire construction process, but cannot accurately reflect the actual carbon emissions in each construction stage, so it is difficult to accurately identify the main links and key factors of carbon emissions, and thus it is impossible to formulate effective emission reduction measures.

[0005] To achieve the above object, the first aspect of the present invention provides a method for predicting phased carbon emissions in road and bridge construction, including the following steps:

[0006] Analyze the predicted carbon emissions of the road and bridge in different construction stages; wherein, the construction stages of the road and bridge include the material production stage, the material transportation stage, and the construction stage;

[0007] Analyze the carbon sink amounts of the road and bridge in different construction stages;

[0008] Based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

[0009] Preferably, the method for obtaining the predicted carbon emissions in the material production stage includes the following steps:

[0010] Through the formula STF = Σ i(Ci×Fi) calculates the predicted carbon emissions STF in the material production stage; where i is the raw material type of the material, Ci is the usage amount of the raw material, Fi is the carbon emission factor of the raw material, and Σ i is the summation of i.

[0011] The present invention takes into account all the main carbon emission sources in the material production stage, including the carbon emissions of the raw materials themselves and the carbon emissions generated by the energy consumption of the equipment during the production of the raw materials, ensuring that the predicted results of the carbon emissions are more accurate, can truly reflect the carbon footprint in the material production process, and lay a foundation for the subsequent analysis of the actual carbon emissions in the material production stage.

[0012] Preferably, the method for obtaining the predicted carbon emissions in the material transportation stage includes the following steps:

[0013] Obtain a number of transportation routes, divide each transportation route into several segments respectively, and obtain several sub-segments of each transportation route; where the transportation route is the driving route of the transportation vehicle to transport the material from the production location to the road and bridge construction site.

[0014] Through the formula YTF = Σ k [Σ r (Qkr×Xkr)] calculates the predicted carbon emissions YTF in the material transportation stage; where r is the sub-segment number, r = 0, 1, …, N, N is a positive integer, Qkr is the carbon emissions per unit time of the transportation vehicle in the sub-segment r, and is obtained through the driving speed - carbon emissions per unit time lookup table of each sub-segment, Xkr is the driving time of the transportation vehicle in the sub-segment r, the driving time is the ratio of the length of the transportation route to the predicted driving speed of the transportation vehicle, k is the transportation vehicle number, Σ k is the summation of k, and Σ r is the summation of r.

[0015] The present invention divides the transportation route into several sub-segments, analyzes the relationship between the driving speed and carbon emissions of the vehicle in each sub-segment, and then calculates the carbon emissions of the transportation vehicle in each sub-segment to obtain the predicted carbon emissions in the material transportation stage, accurately reflecting the carbon emissions in the material transportation process and considering the change in carbon emissions caused by the change in the vehicle driving speed.

[0016] Preferably, the transportation route is divided into several sub-segments according to the speed limit.

[0017] Preferably, the process of constructing the driving speed - carbon emissions per unit time lookup table of each sub-segment includes the following steps:

[0018] Obtain the vehicle information of the transport vehicle and the path information of each transport path, construct a digital twin model of the transport path and the transport vehicle, and obtain a digital twin model of material transportation; among them, the vehicle information includes the vehicle type and the rated load; the path information includes the GIS information of the transport path and the speed limits of each sub-section of the transport path.

[0019] Divide the range of each speed limit into several sub-speeds. The digital twin model of material transportation adjusts the driving speed to the corresponding sub-speed according to the sub-section, and outputs the carbon emissions of the transport vehicle at each sub-speed in each sub-section; calculate the ratio of the carbon emissions of the transport vehicle when transporting at each sub-speed to the driving time corresponding to each sub-speed in the same sub-section, obtain the carbon emissions per unit time of the transport vehicle at each sub-speed in each sub-section, and construct a look-up table of sub-section sub-speed-carbon emissions per unit time; among them, the sub-speed is greater than 0 and does not exceed the speed limit.

[0020] Through the digital twin model, the present invention can dynamically adjust the driving speed according to the real-time road conditions, vehicle information and path information, and output the carbon emissions at the corresponding speed. This dynamic adaptability enables the model to more realistically reflect the actual situation in the material transportation process and improve the accuracy of the prediction results; and through the digital twin model, the carbon emission situation of the transport vehicle at different sub-sections and different speeds can be accurately simulated. This high-precision prediction helps enterprises to more accurately understand the carbon footprint in the material transportation stage and provides a scientific basis for formulating carbon emission reduction strategies; based on the data simulated by the digital twin model, a look-up table of sub-section sub-speed-carbon emissions per unit time is constructed, which can quickly query the carbon emissions at different sub-sections and different speeds without repeated calculations, greatly improving the work efficiency and reducing the calculation cost.

[0021] Preferably, the method for obtaining the predicted driving speed of the transport vehicle includes the following steps:

[0022] Divide a day into several time periods, and extract several sub-section information of each sub-section in each time period from the historical data; among them, the sub-section information includes the traffic flow and the vehicle density.

[0023] Calculate the ratio of the traffic flow to the vehicle density to obtain the historical driving speed of the transport vehicle in each sub-section in each time period; calculate the average value of the historical driving speeds to obtain the predicted driving speed.

[0024] By comprehensively considering the traffic flow and the vehicle density, the method of the present invention can more comprehensively reflect the traffic conditions of each sub-section in each time period; the traffic flow reflects the traffic capacity of the road, while the vehicle density reflects the congestion degree of the road; combining these two factors can more accurately predict the driving speed of the vehicle under different traffic conditions, thereby improving the accuracy of the prediction results.

[0025] Preferably, the method for obtaining the predicted carbon emissions in the construction stage includes the following steps:

[0026] Calculate the product of the energy consumption of each construction equipment and the carbon emission factor of the corresponding energy to obtain the carbon emissions of each construction equipment in the construction stage;

[0027] Calculate the sum of the carbon emissions of each construction equipment in the construction stage to obtain the predicted carbon emissions in the construction stage.

[0028] Preferably, the analysis of the carbon sink amount of the road and bridge in different construction stages includes:

[0029] Calculate the carbon sink amount THJ in the road and bridge construction stage through the formula THJ = Σ d (Qmd × Smd); where Qmd is the carbon sink factor of the carbon sink land, Smd is the area of the carbon sink land, m is the construction stage, d is the carbon sink type, and Σ d is the sum of d.

[0030] Preferably, based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

[0031] Calculate the difference between the carbon emissions and carbon sink amounts in each construction stage to obtain the actual carbon emissions of the road and bridge in different construction stages.

[0032] Preferably, the second aspect of the present invention provides a road and bridge construction stage carbon emission prediction system, including a data analysis module and a prediction module;

[0033] Data analysis module: used to analyze the predicted carbon emissions of the road and bridge in different construction stages; among them, the construction stage of the road and bridge includes the material production stage, the material transportation stage, and the construction stage;

[0034] And analyze the carbon sink amount of the road and bridge in different construction stages;

[0035] Prediction module: Based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] The present invention analyzes the carbon emissions in each stage of road and bridge construction, from material production to transportation and then to construction, ensuring the comprehensiveness of carbon emission analysis. At the same time, by accurately predicting the carbon emissions in each stage, the accuracy of the analysis is improved, which helps enterprises to more accurately understand the carbon footprint in the process of road and bridge construction. In addition, the carbon sink amount is also considered to accurately evaluate the actual carbon emissions in the process of road and bridge construction. The analysis of the carbon sink amount helps to reveal the carbon absorption by the environment, such as vegetation restoration and soil carbon sequestration, so as to more objectively reflect the carbon emissions in the process of road and bridge construction. This method not only provides the carbon emission data in each stage of road and bridge construction, but also provides strong guidance for enterprises to formulate carbon emission reduction strategies by analyzing the actual carbon emissions. It helps to promote the sustainable development of road and bridge construction. By accurately evaluating the carbon emissions, enterprises can more effectively manage resources, reduce environmental pollution, and achieve a win-win situation between economic benefits and environmental protection. At the same time, this method also provides a reference carbon emission analysis framework for other industries, helping to promote the green development of the whole society. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic flow chart of the method of the present invention;

[0040] Figure 2 It is a schematic flow chart of the method for obtaining the predicted driving speed of the present invention;

[0041] Figure 3 It is a schematic structural diagram of the system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following will clearly and completely describe the technical solutions of the present invention in combination with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] Please refer to Figure 1 , the first aspect embodiment of the present invention provides a method for predicting stage-based carbon emissions of road and bridge construction, including the following steps:

[0044] Analyze the predicted carbon emissions of the road and bridge in different construction stages;

[0045] Among them, the construction stage of the road and bridge includes the material production stage, the material transportation stage, and the construction stage;

[0046] The process of analyzing the predicted carbon emissions in the material production stage is as follows:

[0047] The predicted carbon emissions STF in the material production stage are calculated by the formula STF = Σ i (Ci × Fi); where i is the raw material type of the material, Ci is the usage amount of the raw material, Fi is the carbon emission factor of the raw material, and Σ i is the summation of i.

[0048] The predicted carbon emissions in the material production stage of the present invention are the carbon emissions generated by the raw materials during the production process; the carbon emissions of the raw materials are mainly closely related to the raw material type, the usage amount of the raw material, and the corresponding carbon emission factor. If the usage amount of the raw material and the corresponding carbon emission factor are larger, the carbon emissions generated during the material production are larger; if the usage amount of the raw material and the corresponding carbon emission factor are smaller, the carbon emissions generated during the material production are smaller; at the same time, it also reflects the environmental protection properties of the raw materials. For the same usage amount of different raw materials, the worse the environmental protection property of the raw material is, the larger the carbon emissions are, and the better the environmental protection property of the raw material is, the smaller the carbon emissions are.

[0049] The process of analyzing the predicted carbon emissions in the material transportation stage is as follows:

[0050] Obtain several transportation routes, and divide each transportation route into several segments to obtain several sub - segments of each transportation route; where the transportation route is the driving route for the transportation vehicle to transport the materials from the production location to the road and bridge construction site.

[0051] It should be noted that each transportation route is divided into several sub - segments according to the speed limit; for example, if the speed limit of a certain segment in the transportation route is 80, the next segment has a speed limit of 60, and then there is another segment with a speed limit of 80, then each segment with a speed limit is a sub - segment, and thus each transportation route is divided into several sub - segments.

[0052] The predicted carbon emissions YTF in the material transportation stage are calculated by the formula YTF = Σ k [Σ r (Qkr × Xkr)]; where r is the sub - segment number, r = 0, 1, …, N, N is a positive integer, Qkr is the carbon emissions of the transportation vehicle per unit time in the sub - segment r, Xkr is the driving time of the transportation vehicle in the sub - segment r, the driving time is the ratio of the length of the transportation route to the predicted driving speed of the transportation vehicle, k is the transportation vehicle number, Σ k is the summation of k, and Σ r is the summation of r.

[0053] It should be noted that the minimum carbon emissions generated in several transportation routes are the predicted carbon emissions in the material transportation stage; the transportation vehicles are of the same type.

[0054] Among them, the carbon emissions of the transportation vehicle per unit time in sub-section r are obtained through the driving speed - carbon emissions per unit time look-up table for each sub-section. The construction process of the look-up table includes the following steps:

[0055] Obtain the vehicle information of the transportation vehicle and the path information of each transportation route, construct a digital twin model of the transportation route and the transportation vehicle, and obtain a digital twin model of material transportation; among them, the vehicle information includes the vehicle type and the rated load; the path information includes the GIS information of the transportation route and the restricted speed of each sub-section of the transportation route.

[0056] Divide the range of each restricted speed into several sub-speeds. The digital twin model of material transportation simulates the movement of the transportation vehicle based on the vehicle dynamics equation, and adjusts the driving speed to the corresponding sub-speed according to the sub-section. The digital twin model of material transportation outputs the carbon emissions of the transportation vehicle at each sub-speed in each sub-section. Calculate the ratio of the carbon emissions of the transportation vehicle when transporting at each sub-speed to the driving time corresponding to each sub-speed in the same sub-section, obtain the carbon emissions per unit time of the transportation vehicle at each sub-speed in each sub-section, and construct a look-up table of sub-speed - carbon emissions per unit time for each sub-section; among them, the sub-speed is greater than 0 and does not exceed the restricted speed.

[0057] It should be noted that the content of the look-up table includes the section number, the sub-speed value, and the corresponding carbon emissions per unit time;

[0058] The vehicle dynamics equation calculates the instantaneous carbon emission rate of each sub-section at different sub-speeds, considering the load, slope acceleration resistance, and air resistance. The formula example is:

[0059] P=(1 / η)×(1 / 2×ρ×Cd×A×V 3 +μ×G×V×cosθ+G×V×sinθ);

[0060] Among them, P is the power, η is the transmission efficiency, ρ is the air density, Cd is the wind resistance coefficient, A is the cross-sectional area, V is the vehicle speed, μ is the rolling friction coefficient, G is the gravity, and θ is the slope angle.

[0061] It should be further noted that when the vehicle is traveling at a low speed, the engine may not be in the optimal operating range, resulting in incomplete combustion, increased fuel consumption, and rising carbon emissions. When traveling at a medium speed, the engine usually operates in the optimal efficiency range, with sufficient fuel combustion and low carbon emissions. When traveling at a high speed, the engine needs to output more power to overcome air resistance, leading to increased fuel consumption and rising carbon emissions. Therefore, the carbon emissions during the transportation stage are analyzed based on the relationship between the traveling speed and the carbon emissions per unit time.

[0062] The method for obtaining the predicted traveling speed of the transport vehicle is as follows:

[0063] Please refer to Figure 2 , divide a day into several time periods, and extract several sub-road section information of each sub-road section in each time period from historical data; among them, the sub-road section information includes traffic flow and vehicle density;

[0064] Calculate the ratio of the traffic flow to the vehicle density to obtain the historical traveling speed of the transport vehicle on each sub-road section in each time period; calculate the average value of the historical traveling speeds to obtain the predicted traveling speed.

[0065] Based on the traffic flow and vehicle density in different time periods in historical data, the present invention can know the traffic conditions of each sub-road section in different time periods, and further analyze and obtain the traveling speed of the transport vehicle on each sub-road section at different time points.

[0066] It should be noted that when the predicted traveling speed of the transport vehicle is between two sub-speeds in the look-up table, the carbon emissions per unit time of the transport vehicle are the average value of the carbon emissions per unit time corresponding to the two sub-speeds.

[0067] The analysis process of the predicted carbon emissions during the construction stage is as follows:

[0068] Calculate the product of the energy consumption of each construction equipment and the carbon emission factor of the corresponding energy to obtain the carbon emissions of each construction equipment during the construction stage;

[0069] Calculate the sum of the carbon emissions of each construction equipment during the construction stage to obtain the predicted carbon emissions during the construction stage.

[0070] And analyze the carbon sink amount of the road and bridge in different construction stages;

[0071] Specifically, the carbon sink amount THJ during the road and bridge construction stage is calculated through the formula THJ = Σ d (Qmd × Smd); where Qmd is the carbon sink factor of the carbon sink land, Smd is the area of the carbon sink land, m is the construction stage, d is the carbon sink type, and Σ d is the sum over d.

[0072] The carbon sink amount in each construction stage of the present invention is used to evaluate the carbon absorption capacity of the surrounding environment during the road and bridge construction in each stage. The carbon sink amount is mainly closely related to the types of carbon sinks around each construction stage, such as trees, wetlands, etc., the area of the carbon sink land, and the carbon sink factor of the carbon sink land. Among them, the carbon sink factor of the carbon sink land is determined by the type of carbon sink. If the area of the carbon sink land is larger and the carbon sink factor of the carbon sink land is also larger, then the carbon sink amount of the carbon sink land is larger, indicating that the carbon absorption capacity of the carbon sink land is stronger; conversely, the carbon absorption capacity of the carbon sink land is weaker.

[0073] Based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

[0074] Specifically, calculate the difference between the carbon emissions and carbon sink amounts in each construction stage to obtain the actual carbon emissions of the road and bridge in different construction stages.

[0075] Please refer to Figure 3 , the second aspect of the present invention provides a carbon emission prediction system based on road and bridge construction stages, including a data analysis module and a prediction module;

[0076] Data analysis module: used to analyze the predicted carbon emissions of the road and bridge in different construction stages; among them, the construction stages of the road and bridge include the material production stage, the material transportation stage, and the construction stage;

[0077] And analyze the carbon sink amount of the road and bridge in different construction stages;

[0078] Prediction module: Based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

[0079] The present invention is used to evaluate the carbon emissions in each construction stage of road and bridge construction, including the carbon footprint in each stage from raw material acquisition to transportation to construction, so as to find the key links for reducing carbon emissions. With the progress of technology, some low-carbon or zero-carbon building materials have been developed, such as environmentally friendly concrete made from industrial waste residues. Promoting the use of such materials can effectively reduce carbon emissions during road and bridge construction. And measures such as adopting more efficient construction machinery, optimizing the construction process to reduce energy consumption, and using renewable energy for power supply. For example, in some projects, the use of electric excavators and other electric construction equipment has begun to replace traditional fuel-powered equipment. At the same time, environmental protection regulations and industry standards formulated by the government and relevant institutions are also promoting the green transformation of the road and bridge construction industry. By setting clear emission reduction targets and incentive mechanisms, enterprises are encouraged to adopt more environmentally friendly construction methods and technologies. The present invention uses technical means such as big data analysis for accurate prediction and management of carbon emissions. For example, by establishing a carbon emission prediction model, corresponding emission reduction measures can be planned and implemented in advance to improve decision-making efficiency.

[0080] Some of the data in the above formula are taken as numerical values after removing the dimension. The formula is the one closest to the actual situation obtained through software simulation of a large amount of collected data. The preset parameters and preset thresholds in the formula are set by those skilled in the art according to the actual situation or obtained through simulation of a large amount of data.

[0081] The working principle of the present invention: Analyze the predicted carbon emissions of the road and bridge in the material production stage, material transportation stage, and construction stage respectively; and analyze the carbon sink amounts of the road and bridge in the material production stage, material transportation stage, and construction stage respectively. Based on the predicted carbon emissions and carbon sink amounts in the material production stage, obtain the actual carbon emissions in the material production stage; based on the predicted carbon emissions and carbon sink amounts in the material transportation stage, obtain the actual carbon emissions in the material transportation stage; based on the predicted carbon emissions and carbon sink amounts in the construction stage, obtain the actual carbon emissions in the construction stage.

[0082] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for predicting the phased carbon emissions of road and bridge construction, characterized in that It includes the following steps: Analyze the predicted carbon emissions of the road and bridge in different construction stages; among them, the construction stages of the road and bridge include the material production stage, the material transportation stage, and the construction stage; Analyze the carbon sink amount of the road and bridge in different construction stages; Based on the carbon emissions and carbon sink amounts in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

2. The method for predicting phased carbon emissions based on road and bridge construction according to claim 1, wherein The method for obtaining the predicted carbon emissions in the material production stage includes the following steps: The predicted carbon emissions STF in the material production stage are calculated by the formula STF = Σ i (Ci × Fi); where i is the raw material type of the material, Ci is the usage amount of the raw material, Fi is the carbon emission factor of the raw material, and Σ i is the summation of i.

3. The method for predicting phased carbon emissions based on road and bridge construction according to claim 2, wherein, The method for obtaining the predicted carbon emissions in the material transportation stage includes the following steps: Obtain a number of transportation routes, divide each transportation route into several segments, and obtain several sub-segments of each transportation route; among them, the transportation route is the driving route for transporting materials from the production location to the road and bridge construction site by a transport vehicle; The predicted carbon emissions YTF during the material transportation stage are calculated through the formula YTF = Σ k [Σ r (Qkr × Xkr)]; where r is the sub-section number, r = 0, 1, …, N, N is a positive integer, Qkr is the carbon emissions of the transport vehicle per unit time in sub-section r, and is obtained through the lookup table of the driving speed - carbon emissions per unit time of each sub-section, Xkr is the driving time of the transport vehicle in sub-section r, the driving time is the ratio of the length of the transport path to the predicted driving speed of the transport vehicle, k is the transport vehicle number, Σ k is the sum over k, and Σ r is the sum over r.

4. The method for predicting phased carbon emissions based on road and bridge construction according to claim 3, characterized in that The transportation route is divided into several sub-segments according to the speed limit.

5. The method for predicting the phased carbon emissions based on road and bridge construction according to claim 3, wherein, The process of constructing the carbon emissions lookup table per unit time for each sub-segment driving speed includes the following steps: Obtain the vehicle information of the transport vehicle and the route information of each transportation route, construct a digital twin model of the transportation route and the transport vehicle, and obtain a digital twin model of material transportation; among them, the vehicle information includes the vehicle type and the rated load; the route information includes the GIS information of the transportation route and the speed limits of each sub-segment of the transportation route; Divide the range of each speed limit into several sub-speeds, adjust the driving speed of the digital twin model of material transportation to the corresponding sub-speed according to the sub-segment, and output the carbon emissions of the transport vehicle at each sub-speed in each sub-segment; calculate the ratio of the carbon emissions of the transport vehicle when transporting at each sub-speed to the driving time corresponding to each sub-speed in the same sub-segment, obtain the carbon emissions per unit time of the transport vehicle at each sub-speed in each sub-segment, and construct a carbon emissions lookup table per unit time for each sub-segment sub-speed; among them, the sub-speed is greater than 0 and does not exceed the speed limit.

6. The method for predicting phased carbon emissions based on road and bridge construction according to claim 3, wherein, The method for obtaining the predicted driving speed of the transport vehicle includes the following steps: Divide a day into several time periods, and extract several sub-segment information of each sub-segment in each time period from historical data; among them, the sub-segment information includes traffic flow and vehicle density; Calculate the ratio of the traffic flow to the vehicle density to obtain the historical driving speed of the transport vehicle in each sub-segment in each time period; calculate the average value of the historical driving speeds to obtain the predicted driving speed.

7. The method for predicting the phased carbon emissions based on road and bridge construction according to claim 3, wherein The method for obtaining the predicted carbon emissions in the construction stage includes the following steps: Calculate the product of the energy consumption of each construction equipment and the carbon emission factor of the corresponding energy to obtain the carbon emissions of each construction equipment in the construction stage; Calculate the sum of the carbon emissions of each construction equipment in the construction stage to obtain the predicted carbon emissions in the construction stage.

8. The method for predicting stage carbon emissions based on road and bridge construction according to claim 7, wherein The analysis of the carbon sink amount of the road and bridge in different construction stages includes: The carbon sink amount THJ in the road and bridge construction stage is calculated through the formula THJ = Σ d (Qmd × Smd); where Qmd is the carbon sink factor of the carbon sink land, Smd is the area of the carbon sink land, m is the construction stage, d is the carbon sink type, and Σ d is the summation of d.

9. The method for predicting the phased carbon emissions based on road and bridge construction according to claim 8, wherein, The analysis of the actual carbon emissions of the road and bridge in different construction stages includes: Calculate the difference between the carbon emissions and the carbon sink amount in each construction stage to obtain the actual carbon emissions of the road and bridge in different construction stages.

10. A method for predicting the phased carbon emissions of road and bridge construction, which operates based on the phased carbon emissions prediction system for road and bridge construction described in any one of claims 1-9, characterized in that, It includes a data analysis module and a prediction module; Data analysis module: used to analyze the predicted carbon emissions of the road and bridge in different construction stages; among them, the construction stages of the road and bridge include the material production stage, the material transportation stage, and the construction stage; And analyze the carbon sink volume of the road and bridge in different construction stages; Prediction module: Based on the carbon emissions and carbon sink volume in different construction stages, analyze the actual carbon emissions of the road and bridge in different construction stages.

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