Construction method of side slope ecological protection carbon emission measuring and calculating model

Abstract

The invention relates to the technical field of carbon emission calculation model construction, and particularly discloses a slope ecological protection carbon emission calculation model construction method comprising the following steps: obtaining an analysis framework diagram for analyzing a slope ecological protection full life cycle carbon source; inputting the analysis framework diagram into an analysis module for character recognition and extraction to obtain a plurality of stage nodes representing and forming a slope ecological protection full life cycle; performing parameter definition on influence factors which influence the carbon emission of the stage nodes in each stage node through a preset parameter configuration module, and constructing a sub-node carbon emission model of the carbon emission by loading the corresponding influence factors and parameters under each node through classification; summarizing all child node carbon emission models under each stage node to form a stage summarized carbon emission model of the corresponding stage; and forming a carbon emission measuring and calculating model for calculating the carbon emission in the whole life cycle of slope ecological protection according to the stage summary carbon emission model obtained by each stage node.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission calculation model construction, and in particular to a method for constructing a slope ecological protection carbon emission calculation model. Background Art

[0002] Over the past century, the global average surface temperature has increased by 0.6±0.2℃, and the increase in greenhouse gases caused by human activities is considered to be the main reason. The Kyoto Protocol S 、PFC S and SF6 are defined as greenhouse gases, among which CO2, as an important component of greenhouse gases in the atmosphere, has been contributing more and more to the global total radiation due to its rapid growth in the atmosphere over the past decade.

[0003] Construction, industry and transportation are the three main sources of CO2 emissions. Nearly 25% of global energy-related CO2 emissions are generated by the transportation sector each year. As a basic and strategic project, highway engineering has always been developing faster and with higher priority than other industries. In 2019, China became the country with the longest highway in the world, with a total mileage of 143,000 kilometers. At the same time, as highway engineering develops more and more comprehensively, many highway projects will face complex working conditions such as mountains, hills and tunnels. The construction of these projects has produced a large area of ​​exposed high and steep slopes, which will lead to various slope stability problems. In recent years, ecological civilization construction has been vigorously promoted, and slope protection projects have gradually changed from engineering slope protection to ecological slope protection. Ecological slope protection is a green and reliable slope protection technology that protects the local ecological environment to the greatest extent while ensuring slope stability. How to quantitatively reflect the carbon emissions of the project and its impact on the environment is of great significance to the development of ecological civilization construction in the field of slope protection engineering. As one of the environmental management tools that has received much attention in recent years, the life cycle assessment can effectively solve this problem. At present, life cycle assessment has been widely used in many fields, but there is little research on its application in the field of slope protection engineering. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method for constructing a slope ecological protection carbon emission calculation model.

[0005] The main purpose of this application is to provide a method for constructing a slope ecological protection carbon emission calculation model, which includes the following steps:

[0006] Obtain an analytical framework diagram for analyzing the carbon sources of the entire life cycle of slope ecological protection;

[0007] The analysis framework diagram is input into the analysis module for text recognition and extraction to obtain a number of stage nodes representing the entire life cycle of slope ecological protection;

[0008] Use the definition module to define the boundaries of each stage node and write the boundary definitions into the rule nodes;

[0009] The parameters of the influencing factors affecting the carbon emissions of the stage nodes in each stage node are defined by a preset parameter configuration module. The parameter definition is set within the boundary definition scope. At the same time, the influencing factors affecting the stage nodes are classified. Each stage node is divided into at least two sub-nodes represented by the influencing factors and defining the influence boundary through classification. The corresponding influencing factors and parameters are loaded under each node to construct a sub-node carbon emission model of carbon emissions;

[0010] The carbon emission models of all sub-nodes under each stage node are aggregated to form the stage aggregate carbon emission model of the corresponding stage;

[0011] The stage summary carbon emission model obtained from each stage node forms a carbon emission calculation model for calculating the carbon emissions of the entire life cycle of slope ecological protection.

[0012] Furthermore, the analysis module has:

[0013] Identification unit;

[0014] A configuration unit, wherein the configuration unit is used to set the recognition parameters of the recognition unit through a set configuration program, and configure the recognition depth of the recognition unit through the setting of the recognition parameters, so that when the recognition unit performs analysis framework diagram recognition, it can identify to the level set for the entire life cycle of slope ecological protection, so as to obtain the stage nodes of the entire life cycle of slope ecological protection.

[0015] Furthermore, the configuration program of the configuration unit has:

[0016] At least one decomposition rule for decomposing the identification parameters, the decomposition rule is used to perform structural decomposition on the engineering stage extracted by the identification unit to obtain at least one text description field corresponding to the engineering stage, and store the text description field in the configuration library as a storage list of the engineering stage structured parameters;

[0017] The decomposition rules are written into a logic script, and the logic script is linked into the recognition unit to form the recognition logic of the recognition unit.

[0018] Furthermore, the decomposition rules are serialized according to the set recognition parameter levels and then translated into codes to be written into the logic script.

[0019] Furthermore, the definition module has:

[0020] Preset definition interface;

[0021] A loading unit, connected to the configuration unit set by the analysis module, for loading the configuration library;

[0022] An interpolation unit is connected to the loading unit, and sequentially calls out text expression fields according to the storage list, compiles the text expression fields into logic control symbols for boundary indication, uses the logic control symbols as a vocabulary for boundary definition, and interpolates to the definition interface by writing execution statements into the vocabulary;

[0023] In the definition interface, after inputting the data information corresponding to the stage node, the data information is matched in the vocabulary to obtain several logical control symbols, and a logical judgment indication range is formed through the logical control symbols, and the boundary definition is obtained through the logical judgment indication range.

[0024] Furthermore, when defining the parameters of the factors affecting carbon emissions, it includes:

[0025] The first form of parameter definition is performed on the factors that directly cause the loss of plant carbon sinks;

[0026] The influencing factors of the indirect loss of plant carbon sinks due to construction are defined in the second form of parameters;

[0027] Moreover, both the first form parameter definition and the second form parameter definition are within the set boundary definition scope. Meanwhile, each parameter in the second form parameter definition is used to represent the slope ecological protection process information.

[0028] Furthermore, when classifying the influencing factors affecting the stage nodes, it includes:

[0029] Select all influencing factors defined by parameters in the second form in each stage node;

[0030] The slope ecological protection process information contained in the second form of the parameter definition of each influencing factor is called, and the slope ecological protection process information is used as the classification basis to divide each stage node into at least two sub-nodes represented by the influencing factor and limiting the influence boundary.

[0031] Furthermore, the carbon sink factor library is loaded through the carbon emission calculation model to calculate the carbon emissions of the entire life cycle of slope ecological protection.

[0032] This application provides an emission reduction calculation path for the carbon emissions of slope ecological protection throughout its life cycle by constructing a carbon emission calculation model for slope ecological protection throughout its life cycle, which is conducive to the realization of low-carbon construction of slope ecological protection. It is of great significance to calculate the carbon emissions of slope ecological protection throughout its life cycle.

[0033] Through a comprehensive analysis of the carbon emissions of the entire life cycle of slope ecological protection, the entire life cycle of slope ecological protection is divided into several stage nodes. Each stage node is divided into several sub-nodes according to different construction conditions. A corresponding sub-node carbon emission model is constructed under each sub-node. In this way, all sub-node carbon emission models of each stage node can be accurately obtained, and then summarized to form a stage summary carbon emission model of the corresponding stage; the stage summary carbon emission model obtained from each stage node forms a carbon emission measurement model for calculating the carbon emissions of the entire life cycle of slope ecological protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a theoretical framework diagram of life cycle assessment in the present invention;

[0035] Figure 2 It is a stage diagram of the whole life cycle of slope ecological protection in the present invention;

[0036] Figure 3 This is a carbon emission source diagram for the entire life cycle of slope ecological protection in the present invention;

[0037] Figure 4 A flow chart is constructed for the carbon emission calculation model for slope ecological protection in the present invention;

[0038] Figure 5 A geographical location map of the research area in the present invention;

[0039] Figure 6 It is the overview diagram of the slope position in the present invention;

[0040] Figure 7 It is a distribution diagram of the contribution of each single project in the present invention to the carbon emissions at each stage;

[0041] Figure 8 It is the carbon emission ratio diagram of each single project in the present invention;

[0042] Fig. 9 This is a carbon emission inventory diagram for the material production stage in the present invention;

[0043] Fig.10 This is a carbon emission inventory diagram for the construction activity stage in the present invention;

[0044] Fig.11 This is a diagram of the Sobol sensitivity analysis results in the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The International Organization for Standardization (ISO) defines Life Cycle Assessment (LCA) as "a method to summarize and evaluate the potential environmental impacts of all inputs and outputs of a product, activity, technology or service system throughout its life cycle." LCA aims to assess the potential environmental impact of products at different life cycle stages, that is, from "cradle to grave".

[0047] LCA aims to study the environmental factors and their potential impacts in each continuous and interrelated life cycle stage of a product system. By quantifying the energy and material consumption and the impact on the environment at each stage of the life cycle, the transfer of environmental loads between the various stages of the life cycle can be avoided to the greatest extent.

[0048] GB / T 24040-2008 divides LCA theory into four main stages, including target definition and scope, inventory analysis, impact assessment and result interpretation, see Figure 1 .

[0049] The first phase of objectives and scope mainly defines the purpose, objectives, functions and system boundaries of the entire life cycle. The second phase of inventory analysis includes collecting all data related to inputs, processes, emissions, etc. throughout the life cycle. In the third phase of impact assessment, the environmental impact and input resources are quantified based on inventory analysis. The last phase of result interpretation is to explain the results calculated in the impact assessment phase and propose appropriate improvement measures.

[0050] The carbon emission coefficient method originated from the fields of climate change research and environmental science, and has gradually developed in the process of international climate change research and comparison of carbon emission levels of different activities, products or services. The carbon emission coefficient method is applied on a large scale and its calculation is relatively sophisticated. Its core idea is to obtain the carbon emissions of the carbon emission sources by multiplying the activity data of carbon emission sources in engineering activities with the corresponding carbon emission factors, and then add up the carbon emissions of all carbon emission sources to finally obtain the total carbon emissions. The calculation of the carbon emission coefficient method can be carried out according to the following formula:

[0051]

[0052] Where, E: total carbon emissions, unit: kg; Q i: Consumption of a certain carbon source, unit: kg; EF i : Equivalent carbon emission factor of this carbon source.

[0053] Compared with other methods, the carbon emission coefficient method is more convenient and faster, and is particularly suitable for preliminary assessments. When conducting preliminary assessments, the carbon emission coefficient method can provide more information to better understand the carbon footprint information in engineering activities. This method is widely applicable and can be used for activities of all sizes. It is currently one of the most commonly used carbon emission measurement methods.

[0054] Based on the theory of the whole life cycle, the whole life cycle of slope ecological protection should include the preliminary preparation stage, design stage, construction stage, maintenance stage and demolition stage. Each stage in the whole life cycle will produce a certain amount of carbon emissions, but the amount of carbon emissions produced in each stage varies greatly. This application is based on engineering examples and related engineering experience, and only considers the construction stage and maintenance stage. Figure 2 shown.

[0055] This application focuses on the carbon emissions of the entire life cycle of slope ecological protection in the construction stage and the maintenance stage. Among them, the sources of carbon emissions in the construction stage are mainly composed of four parts: the reduction of plant carbon sinks due to land acquisition and demolition, material production, transportation process and construction activities; the sources of carbon emissions in the maintenance stage are mainly composed of carbon emissions generated by three parts: material production, transportation process and construction activities. Among them, increasing plant carbon sinks due to planting will reduce the carbon emissions in this stage. Based on the above analysis, the sources of carbon emissions in the entire life cycle of slope ecological protection are summarized. Figure 3 shown.

[0056] In view of this, the main purpose of this application is to provide a method for constructing a slope ecological protection carbon emission calculation model, which includes the following steps:

[0057] Obtain an analytical framework diagram for analyzing the carbon sources of the entire life cycle of slope ecological protection;

[0058] The analysis framework diagram is input into the analysis module for text recognition and extraction to obtain a number of stage nodes representing the entire life cycle of slope ecological protection;

[0059] Use the definition module to define the boundaries of each stage node and write the boundary definitions into the rule nodes;

[0060] The parameters of the influencing factors affecting the carbon emissions of the stage nodes in each stage node are defined by a preset parameter configuration module. The parameter definition is set within the boundary definition scope. At the same time, the influencing factors affecting the stage nodes are classified. Each stage node is divided into at least two sub-nodes represented by the influencing factors and defining the influence boundary through classification. The corresponding influencing factors and parameters are loaded under each node to construct a sub-node carbon emission model of carbon emissions;

[0061] The carbon emission models of all sub-nodes under each stage node are aggregated to form the stage aggregate carbon emission model of the corresponding stage;

[0062] The stage summary carbon emission model obtained from each stage node forms a carbon emission calculation model for calculating the carbon emissions of the entire life cycle of slope ecological protection.

[0063] Furthermore, the analysis module has:

[0064] Identification unit;

[0065] A configuration unit, wherein the configuration unit is used to set the recognition parameters of the recognition unit through a set configuration program, and configure the recognition depth of the recognition unit through the setting of the recognition parameters, so that when the recognition unit performs analysis framework diagram recognition, it can identify to the level set for the entire life cycle of slope ecological protection, so as to obtain the stage nodes of the entire life cycle of slope ecological protection.

[0066] Furthermore, the configuration program of the configuration unit has:

[0067] At least one decomposition rule for decomposing the identification parameters, the decomposition rule is used to perform structural decomposition on the engineering stage extracted by the identification unit to obtain at least one text description field corresponding to the engineering stage, and store the text description field in the configuration library as a storage list of the engineering stage structured parameters;

[0068] The decomposition rules are written into a logic script, and the logic script is linked into the recognition unit to form the recognition logic of the recognition unit.

[0069] Furthermore, the decomposition rules are serialized according to the set recognition parameter levels and then translated into codes to be written into the logic script.

[0070] Furthermore, the definition module has:

[0071] Preset definition interface;

[0072] A loading unit, connected to the configuration unit set by the analysis module, for loading the configuration library;

[0073] An interpolation unit is connected to the loading unit, and sequentially calls out text expression fields according to the storage list, compiles the text expression fields into logic control symbols for boundary indication, uses the logic control symbols as a vocabulary for boundary definition, and interpolates to the definition interface by writing execution statements into the vocabulary;

[0074] In the definition interface, after inputting the data information corresponding to the stage node, the data information is matched in the vocabulary to obtain several logical control symbols, and a logical judgment indication range is formed through the logical control symbols, and the boundary definition is obtained through the logical judgment indication range.

[0075] Furthermore, when defining the parameters of the factors affecting carbon emissions, it includes:

[0076] The first form of parameter definition is performed on the factors that directly cause the loss of plant carbon sinks;

[0077] The influencing factors of the indirect loss of plant carbon sinks due to construction are defined in the second form of parameters;

[0078] Moreover, both the first form parameter definition and the second form parameter definition are within the set boundary definition scope. Meanwhile, each parameter in the second form parameter definition is used to represent the slope ecological protection process information.

[0079] Furthermore, when classifying the influencing factors affecting the stage nodes, it includes:

[0080] Select all influencing factors defined by parameters in the second form in each stage node;

[0081] The slope ecological protection process information contained in the second form of the parameter definition of each influencing factor is called, and the slope ecological protection process information is used as the classification basis to divide each stage node into at least two sub-nodes represented by the influencing factor and limiting the influence boundary.

[0082] The carbon emission calculation model is used to load the carbon sink factor library to calculate the carbon emissions of slope ecological protection over the entire life cycle.

[0083] This application provides an emission reduction calculation path for the carbon emissions of slope ecological protection throughout its life cycle by constructing a carbon emission calculation model for slope ecological protection throughout its life cycle, which is conducive to the realization of low-carbon construction of slope ecological protection. It is of great significance to calculate the carbon emissions of slope ecological protection throughout its life cycle.

[0084] Through a comprehensive analysis of the carbon emissions of the entire life cycle of slope ecological protection, the entire life cycle of slope ecological protection is divided into several stage nodes. Each stage node is divided into several sub-nodes according to different construction conditions. Under each sub-node, a corresponding sub-node carbon emission model is constructed. In this way, all sub-node carbon emission models of each stage node can be accurately obtained, and then summarized to form a stage summary carbon emission model of the corresponding stage; the stage summary carbon emission model obtained from each stage node forms a carbon emission measurement model for calculating the carbon emissions of the entire life cycle of slope ecological protection.

[0085] The present application also includes the construction of a carbon sink factor library, in which carbon sink factors are obtained, the types of carbon sink factors are determined, and carbon sink factors of the same type are set to the same structure directory.

[0086] Specifically, this application explains the carbon sink factor as follows.

[0087] (1) Plant carbon sink factors:

[0088] Green plants reduce the concentration of carbon dioxide in the air through photosynthesis. When constructing the slope ecological protection project, the green plants within the construction scope will be cut down, and the carbon emissions reduced by this part should also be calculated in the total carbon emissions calculation of the whole life cycle. During the maintenance stage of the slope ecological protection project, the newly planted plants will also reduce the carbon emissions of the entire project through photosynthesis. The plant carbon sink factors involved in the whole process are shown in Table 1.

[0089] Table 1

[0090]

[0091]

[0092] (2) Energy carbon emission factor:

[0093] The calculation method provided by the IPCC National Greenhouse Gas Inventory Guidelines is used, combined with China's specific national conditions, to convert the results into a unified thermal unit to calculate the carbon emission factor of fossil energy. For the carbon emission factor of electricity, the marginal carbon emission factor of electricity consumption and the marginal carbon emission factor of capacity are usually calculated. When calculating the carbon emissions of slope ecological protection, the average of the two is taken as the carbon emission factor of electricity. By querying the results of the baseline emission factors of China's regional power grids in 2021, the marginal carbon emission factor values ​​of electricity consumption and capacity marginal carbon emission factor values ​​of each regional power grid are obtained. The energy carbon emission factors are shown in Table 2.

[0094] Table 2

[0095] type unit Carbon emission factor electricity <![CDATA[tCO2 / MWh]]> 0.705 gasoline kg / kg 3.50 diesel fuel kg / kg 3.67

[0096] (3) Material carbon emission factor library:

[0097] Since the carbon emissions generated by materials account for a large part of the carbon emissions in the entire life cycle of slope ecological protection, the selection of carbon emission factors should reflect their regionality and accuracy. When selecting carbon emission factors for materials, this application gives priority to the use of local research data and the research results of various types of building materials. The carbon emission factors of materials are shown in Table 3.

[0098] Table 3

[0099]

[0100]

[0101] According to the carbon footprint report of Xinlong Holdings Co., Ltd. on non-woven fabrics, the carbon emission factor of non-woven fabrics is 8.68kgCO2 / kg. In addition, the carbon emission factor of fertilizers is 2.73kgCO2 / kg and the carbon emission factor of pesticides is 7.73kgCO2 / kg.

[0102] (4) Carbon emission factor library for transport machinery:

[0103] The main source of carbon emissions generated during the transportation phase is the consumption of electricity or fossil energy such as diesel and gasoline by transportation machinery. The fossil energy consumption of each type of transportation machinery is found through standards and specifications such as the highway engineering machinery unit quota (JTG / T 3833-2018) and the building carbon emission calculation standard (GB / T51366-2019), and then the carbon emission factor of the transportation machinery is obtained through the basic fossil energy carbon emission coefficient, as shown in Table 4.

[0104] Table 4

[0105]

[0106] (5) Construction machinery carbon emission factor library:

[0107] The energy types consumed by construction machinery and the energy consumption per unit machine shift refer to the "Building Carbon Emission Calculation Standard" (GB / T 51366-2019). The carbon emission factors of construction machinery are shown in Table 5.

[0108] Table 5

[0109]

[0110]

[0111] The following is an explanation with examples.

[0112] The construction of a carbon emission calculation model for slope ecological protection is the basis for calculating carbon emissions from slope ecological protection. In the process of constructing the carbon emission calculation model during the construction phase of slope ecological protection, the entire life cycle of slope ecological protection should be divided according to secondary projects, and each secondary project should be divided into independent unit processes with unified carbon emissions. Then, based on the theory of the entire life cycle, separate carbon emissions are calculated, and finally the carbon emissions of the entire project are obtained by adding them together. The construction process of the carbon emission calculation model for slope ecological protection is as follows: Figure 4 shown.

[0113] (1) Parameter definition:

[0114] The six unit projects of graded slope reduction, retaining wall, geocell soil covering and spraying greening, anchor frame beam slope protection, interception and drainage channel, and pedestrian walkway and the stage of land acquisition and demolition to reduce plant carbon sink are represented by i=1, 2, 3, 4, 5, 6, and 7 respectively. The source of carbon emission is represented by the letter l. The specific definitions of the parameters in the carbon emission calculation model during the construction phase are shown in Table 6.

[0115] Table 6

[0116]

[0117] (2) Measurement and modeling during the construction phase:

[0118] The calculation scope of the phase of reducing plant carbon sinks during the demolition and requisitioning during the slope ecological protection construction phase is the carbon sink factor of each plant multiplied by the area of ​​land acquisition during the slope shaping process and then multiplied by the designed service life of the slope ecological protection. The carbon emission sources of other unit projects include three parts: construction material production, transportation process and construction activities. The carbon emission models of the three parts are:

[0119]

[0120] In addition to the reduction of plant carbon sinks due to land acquisition and demolition, the carbon emissions of each unit project are the sum of the three parts of building material production, transportation process and construction activities, namely:

[0121]

[0122] Finally, the carbon emissions during the slope ecological protection construction phase are the sum of all parts, namely:

[0123] C js =∑C i (3.10);

[0124] Carbon emission calculation model during the slope ecological protection and maintenance stage.

[0125] (1) Parameter definition: The three unit projects of fertilization, pesticide and irrigation and the stage of increasing plant carbon sinks are represented by q = 1, 2, 3, and 4 respectively. The source of carbon emission is represented by the letter a. Table 7 shows the specific definitions of the parameters in the carbon emission calculation model of the slope ecological protection and maintenance stage.

[0126] Table 7

[0127]

[0128]

[0129] (2) Calculation and modeling in the maintenance stage: The calculation scope of the carbon sink stage of the slope ecological protection construction stage is the carbon sink factor of each plant multiplied by the planting area of ​​the plant after the slope construction is completed, or the single plant multiplied by the total number of plants and then multiplied by the designed service life of the slope ecological protection. The carbon emission sources of other unit activities include the production of maintenance materials, transportation process and construction activities. The carbon emission model is:

[0130]

[0131] In addition to planting to increase plant carbon sinks, the carbon emissions of other unit projects are the sum of three parts: maintenance material production, transportation engineering and construction activities, namely:

[0132]

[0133] The carbon emissions during the slope ecological protection and maintenance phase are the sum of all parts, namely:

[0134] C yh =ΣC q (3.16);

[0135] Finally, the carbon emissions of the entire life cycle of slope ecological protection are the sum of the carbon emissions in the construction stage and the maintenance stage, that is:

[0136] C=C js +C yh (3.17);

[0137] The following is an example verification.

[0138] This application selects the Hongjian coal mine road slope treatment located about 85km northwest of Fugu County, Shaanxi Province as an engineering case. The Ye (Lugou)-Da (Changhan) highway passes through the middle of the coal mine, the Fu (gu)-Dong (sheng) highway passes through the southern part of the mine field, and the Shen (mu)-Shuo (zhou) and Shen (mu)-Bao (tou) railways pass through the southern and western parts of the mine field respectively, and are connected to the national railway network. The transportation is convenient. The geographical location of the study area is as follows: Figure 5 shown.

[0139] Slope location overview Figure 6 As shown in the figure, the overall layout plan of the slope management design for each section is as follows:

[0140] Section A slope: The lower part of the existing slope has been excavated, and there is a flood drainage channel at the foot of the slope. The space for slope reduction is limited. After comprehensive consideration, a 2.0m high foot retaining wall + geocell spraying greening protection system is adopted in the area with space for slope reduction, and an anchor frame beam + eco-bag greening protection system is adopted in the slope section without space for slope reduction.

[0141] Section B slope: The material composition of Section B2 slope is mainly loess. The overall stability of this section of slope is good, the slope surface is relatively complete, and there is a phenomenon of collapse in some parts. The maximum slope height is about 16m. Comprehensive consideration is given to adopting a protection system of graded slope reduction + foot retaining wall + geocell covering and spraying greening.

[0142] Slope of Section C: The slope of Section C2 is an artificially excavated earth slope, mainly composed of loess. There is a retaining wall about 4.0m high at the foot of the slope. A comprehensive consideration is given to the protection system of planting trees + geocell covering soil and spraying greening above the top of the retaining wall; the slope of Section C3 is located on the southeast side of the Hongjian Office Building. It is an artificially excavated earth slope, mainly composed of loess. Among them: the northeast section of Section C3 has a 7.0m high steep slope about 30.0m from northeast to southwest. The rest of the sections have a total height of about 5.0m. A comprehensive consideration is given to the protection system of retaining wall at the foot of the slope + graded slope + geocell covering soil and spraying greening / grass greening. The southwest section of Section C3 has a total slope height of about 3.5 to 5.0m. A comprehensive consideration is given to the protection system of retaining wall at the foot of the slope + slope top slope + grass greening.

[0143] Calculation of carbon emissions over the entire life cycle of slope ecological protection.

[0144] Carbon emission calculation list during the construction phase:

[0145] Based on the constructed carbon emission calculation model for the entire life cycle of slope ecological protection, carbon emissions were calculated for six individual projects, namely, the land acquisition stage for reducing plant carbon sinks during the slope ecological protection construction phase and the graded slope reduction project, retaining wall project, geocell covering and spraying greening project, anchor frame beam slope protection project, intercepting and drainage channel project and pedestrian walkway project.

[0146] Except for the stage of reducing plant carbon sinks during land acquisition and demolition, the carbon emissions analysis of each individual project material production, transportation machinery and construction activities is shown in Table 8.

[0147] Table 8

[0148]

[0149] Land acquisition and demolition reduced plant carbon sinks by 54.58t, accounting for about 1.22% of the total carbon emissions during the construction phase. As the preliminary preparation for construction activities, the stages are no longer subdivided. The three stages of material production, transportation and construction activities are further subdivided to obtain the contribution distribution diagram of each single project to the three stages ( Figure 7 ) and the carbon emissions percentage of each individual project ( Figure 8 ).pass Figure 7It can be seen that the contribution of each single project to the carbon emissions in the three stages is different. The carbon emissions of the anchor frame beam slope protection project in the material production stage are the largest, followed by the retaining wall project, and the two together account for about 75%; the contribution of each single project in the transportation stage is relatively close, and the graded slope project and the retaining wall project account for a relatively large proportion, which is 26.8% and 34.86%. The carbon emissions in the construction activity stage are mainly composed of three single projects: retaining wall engineering, geocell covering soil spraying greening engineering and anchor frame beam slope protection engineering, accounting for more than 80%.

[0150] Figure 8 This is a graph showing the proportion of carbon emissions for each individual project during the construction phase. It can be seen from the graph that the anchor frame beam slope protection project has the greatest impact on the carbon emissions of the engineering example, followed by the retaining wall project. The total carbon emissions of the two projects account for more than 75%; the smallest proportions are the graded slope project and the pedestrian walkway project, which are 0.74% and 2.26% respectively.

[0151] according to Fig. 9 It can be seen that during the entire material production stage, the carbon emissions of basic building materials such as water, sand, and gravel are relatively low, and their contribution to overall carbon emissions is relatively small. In contrast, the carbon emissions of clay during the material production stage are relatively high, which may be related to the energy consumption in its mining, processing, and transportation. The carbon emissions of anchor rods during the material production stage account for a large proportion, which is mainly affected by the energy consumption during its production and processing.

[0152] Cement mortar and commercial concrete C20, commercial concrete C25, commercial concrete C30 and other concrete-related materials account for a large proportion of total carbon emissions, mainly due to the large amount of carbon dioxide released during cement production. Wood has relatively low carbon emissions and is a more environmentally friendly building material, but when choosing wood, you need to pay attention to its sustainability and procurement sources. Metal materials account for a large proportion of total carbon emissions, mainly due to the energy consumption during their production and processing. As special materials that are indispensable for the entire life cycle of slope ecological protection projects, engineering materials such as fertilizers, non-woven fabrics, geotextiles, and geobags account for a small proportion of total carbon emissions.

[0153] Table 9

[0154] Transport machinery Carbon emissions / t Gasoline truck load capacity 3.5 (t) 23.41 Gasoline dump truck load capacity 5 (t) 8.07 Dump truck diesel type load capacity 8 (t) 53.18

[0155] As can be seen from Table 9, during the entire transportation stage, the carbon emissions of a diesel dump truck with a load capacity of 8 (t) are much greater than those of other types of transportation machinery, accounting for 62.82%. The next largest emissions are those of a gasoline dump truck with a load capacity of 5 (t) and a gasoline truck with a load capacity of 3.5 (t). We should focus on the substitutability of transportation machinery such as gasoline and diesel, and the substitutability of new energy transportation tools such as electric vehicles.

[0156] Carbon emissions from various types of machinery and labor during the construction phase are as follows: Fig.10 As shown. It can be seen from the figure that labor plays a leading role in construction activities and makes a significant contribution to total carbon emissions. Overall carbon emissions can be reduced by optimizing construction technology and improving construction efficiency. Single-bucket excavators contribute 10.45 tons of carbon emissions in construction activities, becoming one of the main sources of carbon emissions. AC arc welders are divided into two categories: within 21kVA and within 32kVA, contributing a total of 20.21 tons of carbon emissions. In addition, the carbon emissions of bulldozers are 2.55 tons, which accounts for a relatively large proportion of mechanical equipment. The construction activity stage is one of the largest stages of carbon emissions during the construction period of slope ecological protection projects. In the process of formulating emission reduction strategies, we should focus on sources with large carbon emissions, such as labor, AC arc welders, and truck cranes.

[0157] Carbon emission calculation list during the maintenance phase: The maintenance phase mainly includes four parts: planting to increase plant carbon sinks, fertilization projects, pesticide projects and irrigation projects. The carbon emission calculation results are shown in Table 10.

[0158] Table 10

[0159] Maintenance stage Carbon emissions / t Planting to increase plant carbon sinks -134.50 Fertilization Project 1.61 Pesticide Engineering 0.34 Irrigation Project 0.63

[0160] As can be seen from Table 10, during the slope ecological protection and maintenance stage, the total carbon emissions are negative, which means that at the macro level, from the completion of the project construction to the design period, the entire maintenance stage not only releases CO2, but also absorbs 131.92t CO2. Compared with the 134.50t CO2 absorbed by plants, the 2.58t CO2 released in fertilization, pesticides and irrigation projects is insignificant, which is also the advantage of slope ecological protection over other slope protection projects. Although there are certain carbon emissions during the maintenance process, compared with the large amount of CO2 absorbed by plants, its burden is relatively small. Slope ecological protection is not only sustainable during the project implementation stage, but also has significant potential in mitigating climate change and promoting ecological balance in the subsequent maintenance stage.

[0161] Sensitivity analysis: Sensitivity analysis is a method widely used in many fields such as scientific modeling, engineering design and environmental assessment to evaluate the sensitivity of model output results to changes in input parameters. The Sobol (name: Sobol) method was proposed by Russian scholars in 1993. SALib (SensitivityAnalysis Library) is a Python (interpreted scripting language) library dedicated to global sensitivity analysis. The library supports a variety of sensitivity analysis methods, one of the common methods is the analysis based on the Sobol index. The Sobol index is a method used to measure the contribution of input variables to the variance of output variables. By decomposing the total variance of the system into the contribution of each input variable and its combination, it provides a comprehensive assessment of the global sensitivity of the system. The Sobol method provides a means to deeply understand the contribution of each input parameter to the output through the decomposition of variance. It performs well in revealing the mutual influence of parameters and the global sensitivity of the system. By choosing the Sobol sensitivity analysis method, it aims to gain a deep insight into the overall sensitivity of the slope ecological protection engineering model and provide targeted information for model optimization and decision making.

[0162] This application uses the Sobol sensitivity analysis method to conduct a global sensitivity analysis on the carbon emission calculation results of the entire life cycle of slope ecological protection, and studies the impact of various input changes on the total carbon emissions of the entire life cycle. The original input parameters of the material production stage, transportation stage and construction activity stage are used as the baseline values ​​and introduced into the Sobol sensitivity analysis model. The calculation results are as follows: Fig.11 shown.

[0163] The first-order sensitivity coefficient S1 represents the contribution of a single parameter to the output variation. The range is between [0, 1]. The larger the value, the more significant the impact of the parameter on the output. i The closer it is to 0, the smaller the effect of the parameter on the output. Conversely, the closer it is to 1, the greater the effect of the parameter on the output.

[0164] Global sensitivity coefficient S T It indicates the comprehensive contribution of a single parameter and its interaction with other parameters to the variation of the output result. The larger the value, the more significant the effect of the parameter and its interaction on the output. T The common contribution of multiple parameters to the overall output variation can be understood.

[0165] according to Fig.11From the data, we can first see that some parameters have high first-order sensitivity coefficients S1, indicating that they have a greater direct impact on the model output. For example, parameters such as commercial concrete C30, steel bars, and diesel dump truck load 8 (t) have high first-order sensitivity coefficients S1, indicating that they have a significant contribution to the changes in the carbon emission calculation results of slope ecological protection. These carbon emission sources are key factors in the model and are essential for accurately predicting carbon emissions.

[0166] Global sensitivity coefficient S T It can help understand the degree of influence of the interaction between parameters on the model output. Parameters such as commercial concrete C30 and steel bars have a high global sensitivity coefficient S T values, indicating that they not only affect the output results when acting alone, but also have significant interactions with other parameters. In addition, some parameters have lower first-order sensitivity coefficients S1 and global sensitivity coefficients S T The carbon emission sources with significant value cannot be ignored, such as geocell and cement mortar. Although they have little impact on the model output, they still need to be considered in practical applications to ensure the comprehensiveness and accuracy of the model.

[0167] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for constructing a slope ecological protection carbon emission calculation model, characterized in that: The steps include: Obtain an analytical framework diagram for analyzing the carbon sources of the entire life cycle of slope ecological protection; The analysis framework diagram is input into the analysis module for text recognition and extraction to obtain a number of stage nodes representing the entire life cycle of slope ecological protection; Use the definition module to define the boundaries of each stage node and write the boundary definitions into the rule nodes; The parameters of the influencing factors affecting the carbon emissions of the stage nodes in each stage node are defined by a preset parameter configuration module. The parameter definition is set within the boundary definition scope. At the same time, the influencing factors affecting the stage nodes are classified. Each stage node is divided into at least two sub-nodes represented by the influencing factors and defining the influence boundary through classification. The corresponding influencing factors and parameters are loaded under each node to construct a sub-node carbon emission model of carbon emissions; The carbon emission models of all sub-nodes under each stage node are aggregated to form the stage aggregate carbon emission model of the corresponding stage; The stage summary carbon emission model obtained from each stage node forms a carbon emission calculation model for calculating the carbon emissions of the entire life cycle of slope ecological protection.

2. The method for constructing a slope ecological protection carbon emission calculation model according to claim 1 is characterized in that: The analysis module has: Identification unit; A configuration unit, wherein the configuration unit is used to set the recognition parameters of the recognition unit through a set configuration program, and configure the recognition depth of the recognition unit through the setting of the recognition parameters, so that when the recognition unit performs analysis framework diagram recognition, it can identify to the level set for the entire life cycle of slope ecological protection, so as to obtain the stage nodes of the entire life cycle of slope ecological protection.

3. The method for constructing a slope ecological protection carbon emission calculation model according to claim 2 is characterized in that: The configuration program of the configuration unit has: At least one decomposition rule for decomposing the identification parameters, the decomposition rule is used to perform structural decomposition on the engineering stage extracted by the identification unit to obtain at least one text description field corresponding to the engineering stage, and store the text description field in the configuration library as a storage list of the engineering stage structured parameters; The decomposition rules are written into a logic script, and the logic script is linked into the recognition unit to form the recognition logic of the recognition unit.

4. The method for constructing a slope ecological protection carbon emission calculation model according to claim 3 is characterized in that: The decomposition rules are serialized according to the set recognition parameter level and then translated into code to be written into the logic script.

5. The method for constructing a slope ecological protection carbon emission calculation model according to claim 3 is characterized in that: The definition module has: Preset definition interface; A loading unit, connected to the configuration unit set by the analysis module, for loading the configuration library; An interpolation unit is connected to the loading unit, and sequentially calls out text expression fields according to the storage list, compiles the text expression fields into logic control symbols for boundary indication, uses the logic control symbols as a vocabulary for boundary definition, and interpolates to the definition interface by writing execution statements into the vocabulary; In the definition interface, after inputting the data information corresponding to the stage node, the data information is matched in the vocabulary to obtain several logical control symbols, and a logical judgment indication range is formed through the logical control symbols, and the boundary definition is obtained through the logical judgment indication range.

6. The method for constructing a slope ecological protection carbon emission calculation model according to claim 1 is characterized in that: When defining parameters for factors affecting carbon emissions, the following are included: The first form of parameter definition is performed on the factors that directly cause the loss of plant carbon sinks; The influencing factors of the indirect loss of plant carbon sinks due to construction are defined in the second form of parameters; Moreover, both the first form parameter definition and the second form parameter definition are within the set boundary definition scope. Meanwhile, each parameter in the second form parameter definition is used to represent the slope ecological protection process information.

7. The method for constructing a slope ecological protection carbon emission calculation model according to claim 6 is characterized in that: When classifying the factors affecting the stage nodes, they include: Select all influencing factors defined by parameters in the second form in each stage node; The slope ecological protection process information contained in the second form of the parameter definition of each influencing factor is called, and the slope ecological protection process information is used as the classification basis to divide each stage node into at least two sub-nodes represented by the influencing factor and limiting the influence boundary.

8. The method for constructing a slope ecological protection carbon emission calculation model according to claim 1 is characterized in that: The carbon emission calculation model is used to load the carbon sink factor library to calculate the carbon emissions of slope ecological protection over the entire life cycle.

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