A Method for Quantifying the Carbon Emissions in the Whole Life Cycle of Construction Waste from Subway Projects

Abstract

The present invention discloses a method for quantifying the carbon emissions throughout the life cycle of subway engineering muck, which relates to the technical field of carbon emission calculation, and includes the following steps: First, divide the life cycle of subway engineering muck into a generation stage, an on-site resource utilization stage, a transportation stage, and a disposal stage; then, according to the size data of subway stations and tunnels, calculate the generation amount of subway engineering muck; next, combine the data information of construction equipment and vehicles and carbon emission factor parameters to calculate the carbon emissions of each link of the engineering muck; finally, the total carbon emissions of all stages is the carbon emissions throughout the life cycle of subway engineering muck. The present invention proposes a relatively accurate and practical method for quantifying the carbon emissions throughout the life cycle of subway engineering muck in view of the unclear carbon emission quantification mechanism of subway engineering muck, filling the technical gap in this part. At the same time, through verification, the method of the present invention has reference value for the low-carbon development of the industry.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission calculation, and particularly relates to a method for quantifying the carbon emissions of the whole life cycle of subway engineering muck. Background Art

[0002] Since the "dual carbon" strategy was proposed, various industries have been developing towards low-carbon. The carbon emissions of the whole process of the construction industry account for half of the total national carbon emissions. It can be seen that energy conservation and emission reduction in the construction industry are extremely urgent. Mastering accurate carbon emission data is very important for guiding the carbon reduction work in the industry. At the same time, industry personnel have also been exploring the carbon trading market in recent years, and actual and accurate carbon emission data is also particularly important for market operation and fairness and standardization. Therefore, it is very necessary to invent a reliable, credible and scientific carbon emission quantification method.

[0003] For the current carbon emission quantification model, the current research mainly considers the building main body. The carbon emission quantification methods for each stage and even the whole life cycle of the building are relatively mature, but the carbon emission quantification methods for infrastructure are not yet mature and perfect. At the same time, the method for quantifying the carbon emissions of subway muck is not detailed enough and still remains at the level of rough estimation. Therefore, a more perfect method needs to be provided to solve the problems existing in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for quantifying the carbon emissions of the whole life cycle of subway engineering muck, so as to solve the problems existing in the prior art that the carbon emission quantification mechanism of engineering muck is not clear and the calculation system boundary is not defined.

[0005] To achieve the above purpose, the present invention provides a method for quantifying the carbon emissions of the whole life cycle of subway engineering muck, including the following steps:

[0006] Step 1: Determine the system boundary and object of the quantification method;

[0007] Step 2: Establish a calculation model for the generation amount of subway engineering muck, and calculate the generation amount of engineering muck according to the size data of subway stations and tunnels;

[0008] Step 3: Establish a carbon emission quantification model for the generation stage of subway engineering muck, a carbon emission quantification model for the on-site resource utilization stage of subway engineering muck, a carbon emission quantification model for the transportation stage of subway engineering muck, and a carbon emission quantification model for the disposal stage of subway engineering muck, and calculate the carbon emissions of each stage according to the specific construction equipment and vehicle data information and carbon emission factor parameters;

[0009] Step 4: Calculate the carbon emissions of the whole life cycle of subway engineering muck.

[0010] Preferably, in step one, the system boundary of the quantification method includes the engineering muck generation stage, on-site resource utilization stage, transportation stage, and disposal stage, and the quantification objects include construction site equipment, vertical transportation vehicles, horizontal transportation vehicles, and mechanical equipment in the resource utilization process.

[0011] Preferably, the expression of the calculation model for the generation quantity of subway engineering muck established in step two is as follows:

[0012] ;

[0013] Among them, is the total generation quantity of subway engineering muck, with the unit of m 3 ; is the excavation diameter of the shield machine, with the unit of m; is the length of the shield tunnel, with the unit of m; is the loose coefficient of engineering muck; is the length of the subway station, with the unit of m; is the width of the subway station, with the unit of m; is the height of the subway station, with the unit of m; is the correction coefficient.

[0014] Preferably, the calculation expression of the carbon emission quantification model in the subway engineering muck generation stage is as follows:

[0015] ;

[0016] In the formula, is the carbon emission in the engineering muck generation stage, with the unit of kgCO2eq; is the power of the shield machine, with the unit of kw; is the tunneling working duration, with the unit of h; is the total number of shield sections; is the electricity carbon emission factor, with the unit of kgCO2eq / (kw·h); is the unit working efficiency of the excavator, with the unit of m 3 / h; is the unit energy consumption of the excavator, with the unit of L / h; is the diesel carbon emission factor, with the unit of kgCO2eq / L; represents the muck generation quantity of the subway station, with the unit of m 3 .

[0017] Preferably, the calculation expression of the carbon emission quantification model in the on-site resource utilization stage of subway engineering muck is as follows:

[0018] ;

[0019] Among them, is the carbon emission during the on-site resource utilization stage of construction waste, with the unit of kgCO2eq; is the specific gravity of construction waste, with the unit of t / m 3 ; is the on-site resource utilization rate; is the power consumption for processing per unit of construction waste, with the unit of kw·h / t; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the consumption of new materials produced from mined resources for type-x energy; is the carbon emission factor of type-x energy.

[0020] Preferably, the calculation expression of the carbon emission quantification model for the transportation stage of subway construction waste is as follows:

[0021] ;

[0022] In the formula, is the carbon emission during the transportation stage of construction waste, with the unit of kgCO2eq; is the power of the vertical transportation equipment, with the unit of kw; is the working duration of vertical transportation, with the unit of h; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the carbon emission factor of transportation vehicles, with the unit of kgCO2eq / (t·km); is the transportation mass, with the unit of t; is the transportation distance, with the unit of km; is the coefficient of empty vehicle return.

[0023] Preferably, the calculation expression of the carbon emission quantification model for the disposal stage of subway construction waste is as follows:

[0024] ;

[0025] In the formula, is the carbon emission during the disposal stage of construction waste, with the unit of kgCO2eq; is the resource utilization rate of construction waste; is the power consumption per unit of construction waste during the resource utilization process, with the unit of kw·h; is the consumption of type-y energy during the production process of resource utilization products; is the carbon emission factor of type-y energy; is the landfill rate of construction waste; is the unit working efficiency of the bulldozer, with the unit of m 3 / h; is the fuel consumption per hour of the bulldozer, with the unit of L / h.

[0026] Preferably, the calculation expression of the carbon emissions in the whole life cycle of subway engineering muck in step four is as follows:

[0027] ;

[0028] Among them, is the carbon emissions in the whole life cycle of engineering muck, with the unit of kgCO2eq.

[0029] Therefore, the above-mentioned method for quantifying the carbon emissions in the whole life cycle of a subway engineering muck of the present invention has the following beneficial effects:

[0030] (1) The method for quantifying the carbon emissions in the whole life cycle of the subway engineering muck of the present invention comprehensively considers the overall generation amount of the subway engineering muck, including not only the engineering muck generation amount of the subway station and the shield tunnel, but also incorporates the muck generation amount of the ventilation shaft and the auxiliary project by using a correction coefficient. At the same time, the loose coefficient of the subway excavation stratum is also considered, which can comprehensively reflect the overall generation amount of the subway engineering muck;

[0031] (2) Starting from the whole life cycle theory, the present invention quantifies the carbon emissions of the subway engineering muck, tracks the carbon emissions in different stages of the engineering muck, and provides data support for carbon reduction work in the aspect of engineering muck;

[0032] (3) The present invention separately quantifies the carbon emissions of different disposal methods of the engineering muck. Different disposal methods have different degrees of impact on the urban environment. By quantifying the carbon emissions of different disposal methods, it provides an effective reference value for selecting the disposal method of the engineering muck.

[0033] Next, through the drawings and embodiments, the technical solutions of the present invention will be further described in detail. Description of the Drawings

[0034] Figure 1 is the overall flow chart of a method for quantifying the carbon emissions in the whole life cycle of a subway engineering muck of the present invention. Detailed Embodiments

[0035] The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] Please refer to Figure 1 , a method for quantifying the carbon emissions in the whole life cycle of a subway engineering muck, including the following steps:

[0037] Step 1. Determine the system boundary and object of the quantification method; the system boundary of the quantification method includes the engineering muck generation stage, on-site resource utilization stage, transportation stage, and disposal stage, and the quantification objects include construction site equipment, vertical transportation vehicles, horizontal transportation vehicles, and mechanical equipment in the resource utilization process;

[0038] Step 2. Establish a calculation model for the generation volume of subway engineering muck, and calculate the generation volume of engineering muck based on the size data of subway stations and tunnels; the specific expression is as follows:

[0039] ;

[0040] Where, is the total generation volume of subway engineering muck, with the unit of m 3 ; is the excavation diameter of the shield machine, with the unit of m; is the length of the shield tunnel, with the unit of m; is the loose coefficient of engineering muck; is the length of the subway station, with the unit of m; is the width of the subway station, with the unit of m; is the height of the subway station, with the unit of m; is the correction coefficient.

[0041] Step 3. Establish a carbon emission quantification model for the subway engineering muck generation stage, a carbon emission quantification model for the subway engineering muck on-site resource utilization stage, a carbon emission quantification model for the subway engineering muck transportation stage, and a carbon emission quantification model for the subway engineering muck disposal stage, and calculate the carbon emissions of each stage according to the specific construction equipment and vehicle data information and carbon emission factor parameters;

[0042] The calculation expression of the carbon emission quantification model for the subway engineering muck generation stage is as follows:

[0043] ;

[0044] In the formula, is the carbon emission in the engineering muck generation stage, with the unit of kgCO2eq; is the power of the shield machine, with the unit of kw; is the tunneling working duration, with the unit of h; is the total number of shield sections; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the unit working efficiency of the excavator, with the unit of m 3 / h; is the unit energy consumption of the excavator, with the unit of L / h; is the carbon emission factor of diesel, with the unit of kgCO2eq / L; represents the muck generation volume of the subway station, with the unit of m3 。

[0045] The calculation expression of the carbon emission quantification model for the on-site resource utilization stage of subway project muck is as follows:

[0046] ;

[0047] Wherein, is the carbon emission during the on-site resource utilization stage of muck, with the unit of kgCO2eq; is the specific gravity of muck, with the unit of t / m 3 ; is the on-site resource utilization rate; is the power consumption for processing per unit of muck, with the unit of kw·h / t; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the consumption of new materials produced from mined resources for type-x energy; is the carbon emission factor of type-x energy.

[0048] The calculation expression of the carbon emission quantification model for the transportation stage of subway project muck is as follows:

[0049] ;

[0050] In the formula, is the carbon emission during the transportation stage of muck, with the unit of kgCO2eq; is the power of the vertical transportation equipment, with the unit of kw; is the working duration of vertical transportation, with the unit of h; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the carbon emission factor of transportation vehicles, with the unit of kgCO2eq / (t·km); is the transportation mass, with the unit of t; is the transportation distance, with the unit of km; is the coefficient of empty vehicle return.

[0051] The calculation expression of the carbon emission quantification model for the disposal stage of subway project muck is as follows:

[0052] ;

[0053] In the formula, is the carbon emission during the disposal stage of muck, with the unit of kgCO2eq; is the muck resource utilization rate; is the power consumption per unit of muck resource utilization process, with the unit of kw·h; is the consumption of type-y energy in the production process of resource utilization products; is the carbon emission factor of energy type y; is the landfill rate of muck; is the unit working efficiency of the bulldozer, with the unit of m 3 / h; is the fuel consumption per hour of the bulldozer, with the unit of L / h.

[0054] Step 4: Calculate the carbon emissions of the whole life cycle of the muck in the subway project; the specific calculation expression is as follows:

[0055] ;

[0056] Among them, is the carbon emissions of the whole life cycle of the muck in the project, with the unit of kgCO2eq.

[0057] Embodiment

[0058] The data of the embodiment comes from the actual data of a subway project. In this embodiment, the required parameter data will be listed, and the whole life cycle carbon emissions of the muck in the subway project will be quantified based on these data. In this embodiment, the loose coefficient of the muck in the project is taken as 1.5 according to the research situation; the correction coefficient is determined to be 1.2 according to the research situation; the empty vehicle return coefficient is taken as 1.67 according to the literature; the required carbon emission factor parameters are selected according to the "Building Carbon Emission Calculation Standard", the Chinese Life Cycle Basic Database, and the Chinese Product Life Cycle Greenhouse Gas Emission Coefficient Library, as shown in Table 1 specifically:

[0059] Table 1 Summary Table of Carbon Emission Factors

[0060] ;

[0061] This embodiment provides a method for quantifying the whole life cycle carbon emissions of the muck in the subway project. First, a calculation model for the muck generation volume in the subway project is established to lay a data foundation for the subsequent carbon emission quantification model; then, carbon emission quantification models for the muck generation stage, on-site resource utilization stage, transportation stage, and disposal stage in the subway project are established; finally, the total carbon emissions of the whole life cycle of the muck in the subway project are the sum of the results of the above carbon emission quantification models.

[0062] 1. Calculation of the muck generation volume in the subway project

[0063] The subway project includes tunnel boring and station excavation. The muck volume and carbon emissions generated by different construction methods are different. The common construction methods for subway tunnel construction are the earth pressure balance shield method and the slurry balance shield method. The main construction method for station excavation in China is the open cut method. For the convenience of calculation, in this embodiment, it is assumed that the whole subway tunnel uses the earth pressure balance shield method and the slurry balance shield method, and the open cut method is used for station excavation.

[0064] The amount of construction waste generated in the subway project includes the construction waste generated from the construction of subway stations and shield tunnels. At the same time, the construction waste generated from the ancillary projects and ventilation shafts is included in this calculation using a correction factor to ensure that the calculation results are closer to the actual situation.

[0065] The calculation formula of the calculation model for the amount of construction waste generated in the subway project is as follows:

[0066] (1);

[0067] Among them, is the total amount of construction waste generated in the subway project, with the unit of m 3 ; is the excavation diameter of the shield machine, with the unit of m; is the length of the shield tunnel, with the unit of m; is the loose coefficient of construction waste; is the length of the subway station, with the unit of m; is the width of the subway station, with the unit of m; is the height of the subway station, with the unit of m; is the correction factor.

[0068] The actual data required in the calculation process of the amount of construction waste generated in the subway project in this embodiment is shown in Table 2.

[0069] Table 2 Actual data required for calculating the amount of construction waste generated in the subway project

[0070] ;

[0071] Substituting the relevant coefficients and the data in Table 2 into formula (1) for calculation, it can be obtained that: the amount of construction waste generated by the shield tunnel is 71515.260 m 3 , the amount of construction waste generated by the subway station is 266511.741 m 3 , and the total amount of construction waste is 354928.352 m 3 .

[0072] 2. Calculation of carbon emissions in the stage of generating construction waste in the subway project

[0073] The carbon emissions in the stage of generating construction waste in the subway project include the carbon emissions from the two processes of shield tunnel boring and subway station excavation. Among them, the carbon emissions in the process of shield tunnel boring come from the energy consumption of the shield machine, and the carbon emissions in the process of subway station excavation come from the fuel consumption of the excavator.

[0074] The calculation formula of the quantification model for carbon emissions in the stage of generating construction waste in the subway project is as follows:

[0075] (2);

[0076] In the formula, is the carbon emission during the generation stage of construction muck, with the unit of kgCO2eq; is the power of the shield machine, with the unit of kw; is the tunneling working duration, with the unit of h; is the total number of shield sections; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the unit working efficiency of the excavator, with the unit of m 3 / h; is the unit energy consumption of the excavator, with the unit of L / h; is the carbon emission factor of diesel, with the unit of kgCO2eq / L; represents the muck generation volume of the subway station, with the unit of m 3 , which is calculated by the following formula:

[0077] .

[0078] The relevant parameters of the shield machine and the excavator are shown in Table 3:

[0079] Table 3 Relevant parameters of the shield machine and the excavator

[0080] ;

[0081] Substituting the correlation coefficients and the data in Table 3 into formula (2) for calculation, it can be obtained that: the carbon emission during the generation stage of subway engineering muck is 2,980,154 kgCO2eq, among which 1,805,837 kgCO2eq is generated in the shield tunnel section, accounting for about 60.6%, and 1,174,317 kgCO2eq is generated in the excavation of the subway station, accounting for about 39.4%.

[0082] 3. Calculation of carbon emissions during the on-site resource utilization stage of subway engineering muck

[0083] The on-site resource utilization stage of subway engineering muck refers to the process of screening and managing the excavated subway engineering muck. Through the investigation of the project site of the embodiment, the on-site management covers the processes of mud-water separation, sand washing, and pressure filtration. The carbon emissions in this process come from the electric energy consumed by the mechanical equipment used in each link. In addition, the carbon emissions in the on-site resource utilization stage also involve the substitution compensation of raw materials, including the upstream emissions generated by clay and rock mining. According to the total benefit algorithm, the carbon emissions in the on-site resource utilization stage are due to the energy consumption and the indirect impact of the positive benefits brought by reducing raw material mining.

[0084] The calculation expression of the carbon emission quantification model in the on-site resource utilization stage of subway engineering muck is as follows:

[0085] (3);

[0086] Among them, is the carbon emission during the on-site resource utilization stage of construction waste soil, with the unit of kgCO2eq; is the specific gravity of the waste soil, with the unit of t / m 3 ; is the on-site resource utilization rate; is the power consumption for treating a unit of waste soil, with the unit of kw·h / t; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the consumption of new materials produced by mining resource utilization for energy type x; is the carbon emission factor of energy type x.

[0087] In this embodiment, after the resource utilization treatment of construction waste soil, recycled sand and recycled non-fired bricks are produced. The relevant data of on-site resource utilization of subway construction waste soil are shown in Table 4:

[0088] Table 4 Relevant data of on-site resource utilization of subway construction waste soil

[0089] ;

[0090] Substituting the correlation coefficients and the data in Table 4 into formula (3) for calculation, it can be obtained that: the carbon emission during the on-site resource utilization stage of subway construction waste soil is -2432901 kgCO2eq, that is, through on-site resource utilization treatment, the carbon emission can be reduced by 2432901 kgCO2eq.

[0091] 4. Calculation of carbon emission during the transportation stage of subway construction waste soil

[0092] The transportation stage of subway construction waste soil is divided into two links: vertical transportation and horizontal transportation. Vertical transportation refers to the process of using vertical transportation equipment to vertically lift the generated construction waste soil from the underground construction site to the temporary stacking yard on the ground in the subway underground construction area. The carbon emission in this process comes from the energy consumption of the vertical transportation equipment. Horizontal transportation refers to the process of transporting the construction waste soil after on-site treatment to the designated waste soil disposal site by transportation vehicles horizontally from the subway construction site and returning to the original place after unloading. The carbon emission in this process comes from the electricity consumption of the transportation vehicles.

[0093] The calculation expression of the carbon emission quantification model during the transportation stage of subway construction waste soil is as follows:

[0094] (4);

[0095] In the formula, is the carbon emission during the transportation stage of construction waste soil, with the unit of kgCO2eq; is the power of the vertical transportation equipment, with the unit of kw; is the working hours of vertical transportation, unit: h; is the electricity carbon emission factor, unit: kgCO2eq / (kw·h); is the carbon emission factor of transportation vehicles, unit: kgCO2eq / (t·km); is the transportation mass, unit: t; is the transportation distance, unit: km; is the coefficient of empty vehicle return.

[0096] The vertical transportation equipment in this embodiment is a gantry crane, and the horizontal transportation vehicle is an electric heavy truck (30t). The relevant parameters of the gantry crane and the electric heavy truck (30t) are shown in Table 5:

[0097] Table 5 Relevant parameters of gantry crane and electric heavy truck (30t)

[0098] ;

[0099] Since a part of the construction waste has been resourcefully treated on-site, when calculating the carbon emissions in the transportation stage, the amounts of construction waste for vertical transportation and horizontal transportation are different. The amount of construction waste for horizontal transportation needs to exclude the amount of construction waste resourcefully treated on-site.

[0100] Substituting the relevant coefficients and the data in Table 5 into formula (4) for calculation, it can be obtained that: the carbon emissions of vertical transportation in the transportation stage of subway construction waste are 217048 kgCO2eq, and the carbon emissions of horizontal transportation are 806854 kgCO2eq, that is, the total carbon emissions in the transportation stage are 1023902 kgCO2eq.

[0101] 5. Calculation of carbon emissions in the disposal stage of subway construction waste

[0102] The disposal stage of subway construction waste is divided into two processes: the resource utilization process and the landfill process. The resource utilization process refers to the process of transporting the generated subway construction waste to a resource utilization enterprise for disposal and recycling. The landfill process is the process of transporting the untreated construction waste to a landfill for landfill.

[0103] The calculation expression of the carbon emission quantification model in the disposal stage of subway construction waste is as follows:

[0104] (5);

[0105] In the formula, is the carbon emissions in the disposal stage of construction waste, unit: kgCO2eq; is the resource utilization rate of construction waste; is the power consumption per unit of construction waste resource utilization process, unit: kw·h; is the energy consumption of type y during the production process of resource-based products; is the carbon emission factor of type y energy; is the landfill rate of construction waste; is the unit working efficiency of the bulldozer, with the unit m 3 / h; is the fuel consumption per hour of the bulldozer, with the unit L / h.

[0106] In this embodiment, the resource utilization rate in the construction waste disposal stage is 25%, and the landfill rate is 30%. For the convenience of calculation, the resource-based carbon emission reduction amount in the disposal stage is calculated in proportion to the on-site resource-based carbon emission reduction amount. The relevant data required for calculating the carbon emissions in the subway project construction waste disposal stage are shown in Table 6:

[0107] Table 6 Relevant data required for calculating the carbon emissions in the subway project construction waste disposal stage

[0108] ;

[0109] Substituting the data in Table 6 into formula (5), it can be calculated that: 29,271 kgCO2eq will be generated during the landfill process in the disposal stage, and 1,351,612 kgCO2eq of carbon emissions will be reduced during the resource-based process, that is, 1,322,341 kgCO2eq of carbon emissions will be reduced in the subway project construction waste disposal stage.

[0110] 6. Calculation of the carbon emissions of the whole life cycle of subway project construction waste

[0111] The carbon emission quantification model of the whole life cycle of subway project construction waste is the sum of the carbon emission quantification models of the above four stages. The specific calculation expression of the carbon emissions of the whole life cycle of subway project construction waste is as follows:

[0112] (6);

[0113] Among them, is the carbon emissions of the whole life cycle of construction waste, with the unit kgCO2eq.

[0114] Substituting the calculation results of the carbon emission models of the above stages into formula (6), it can be calculated that: the carbon emissions of the whole life cycle of subway project construction waste in this embodiment are 248,814 kgCO2eq. Starting from the perspective of the whole life cycle in this embodiment, through the calculation of the present invention, it is found that resource-based treatment can greatly reduce carbon emissions, and a certain proportion of resource-based treatment of construction waste can achieve its own "carbon neutrality" effect.

[0115] Therefore, the present invention adopts the above-mentioned method for quantifying the carbon emissions throughout the life cycle of subway engineering muck, solves the problem of the lack of a carbon emission quantification model for engineering muck from the perspective of the whole life cycle, and can analyze and evaluate the treatment of engineering muck with different disposal methods through the quantification model, providing strong support for the environmental benefits in the subsequent resource treatment of engineering muck and providing effective guidance for the work of reducing carbon emissions.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. 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 they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for quantifying the carbon emissions throughout the life cycle of subway engineering muck, characterized in that, It includes the following steps: Step 1: Determine the system boundary and object of the quantification method; the system boundary of the quantification method includes the engineering muck generation stage, on-site resource utilization stage, transportation stage, and disposal stage, and the quantification objects include construction site equipment, vertical transportation vehicles, horizontal transportation vehicles, and mechanical equipment in the resource utilization process; Step 2: Establish a calculation model for the generation amount of subway engineering muck, and calculate the generation amount of engineering muck based on the size data of subway stations and tunnels; the expression of the established calculation model for the generation amount of subway engineering muck is as follows: ； Among them, is the total amount of muck generated in the subway project, with the unit of m 3 ; is the excavation diameter of the shield machine, with the unit of m; is the length of the shield tunnel, with the unit of m; is the loose coefficient of muck; is the length of the subway station, with the unit of m; is the width of the subway station, with the unit of m; is the height of the subway station, with the unit of m; is the correction coefficient; Step 3: Establish a carbon emission quantification model for the subway engineering muck generation stage, a carbon emission quantification model for the subway engineering muck on-site resource utilization stage, a carbon emission quantification model for the subway engineering muck transportation stage, and a carbon emission quantification model for the subway engineering muck disposal stage, and calculate the carbon emissions in each stage according to the specific construction equipment and vehicle data information and carbon emission factor parameters; The calculation expression of the carbon emission quantification model for the subway engineering muck on-site resource utilization stage is as follows: ； Among them, is the carbon emission during the on-site resource utilization stage of construction waste, with the unit of kgCO2eq; is the specific gravity of construction waste, with the unit of t / m 3 ; is the on-site resource utilization rate; is the power consumption for treating unit construction waste, with the unit of kw·h / t; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the consumption of new materials produced by mining resource utilization for energy type x; is the carbon emission factor of energy type x; The calculation expression of the carbon emission quantification model for the subway engineering muck transportation stage is as follows: ； In the formula, is the carbon emission during the engineering muck transportation stage, with the unit of kgCO2eq; is the power of the vertical transportation equipment, with the unit of kw; is the working duration of the vertical transportation, with the unit of h; is the carbon emission factor of electricity, with the unit of kgCO2eq / (kw·h); is the carbon emission factor of the transport vehicle, with the unit of kgCO2eq / (t·km); is the transport mass, with the unit of t; is the transport distance, with the unit of km; is the empty vehicle return coefficient; Step 4: Calculate the carbon emissions of the whole life cycle of subway engineering muck.

2. The full-life-cycle carbon emission quantification method for the muck of subway engineering according to claim 1, wherein, The calculation expression of the carbon emission quantification model for the subway engineering muck generation stage is as follows: ； In the formula, is the carbon emission during the generation stage of construction muck, with the unit of kgCO2eq; is the power of the shield machine, with the unit of kw; is the tunneling working duration, with the unit of h; is the total number of shield sections; is the electricity carbon emission factor, with the unit of kgCO2eq / (kw·h); is the unit working efficiency of the excavator, with the unit of m 3 / h; is the unit energy consumption of the excavator, with the unit of L / h; is the diesel carbon emission factor, with the unit of kgCO2eq / L; represents the muck generation volume of the subway station, with the unit of m 3 .

3. A method for quantifying the carbon emissions throughout the life cycle of subway engineering muck, as described in claim 2, characterized in that The calculation expression of the carbon emission quantification model for the subway engineering muck disposal stage is as follows: ； In the formula, is the carbon emission during the engineering muck disposal stage, with the unit of kgCO2eq; is the resource utilization rate of muck; is the power consumption per unit of muck resource utilization process, with the unit of kw·h / t; is the energy consumption of type y during the production process of resource products; is the carbon emission factor of type y energy; is the landfill rate of muck; is the unit working efficiency of the bulldozer, with the unit of m 3 / h; is the fuel consumption per hour of the bulldozer, with the unit of L / h.

4. A method for quantifying the carbon emissions throughout the life cycle of subway project muck, as claimed in claim 3, wherein The calculation expression of the carbon emissions of the whole life cycle of subway engineering muck in Step 4 is as follows: ； Among them, is the carbon emission of the whole life cycle of construction waste, with the unit of kgCO2eq.

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