Highway industrialization green low-carbon construction evaluation method

Abstract

The invention relates to a highway industrialization green low-carbon construction evaluation method, which combines with highway industrialization construction practice, extracts three elements of land saving degree, filling and digging balance degree and carbon reduction degree which directly reflect a highway industrialization target, and evaluates the highway industrialization level and rationality, and comprises the following specific operations: firstly, respectively calculating the three elements of highway industrialization; and performing respective evaluation according to the sub-item evaluation indexes. And then comprehensive weighted values of three elements of a mountainous area, a plain area and a hilly area are selected, a comprehensive evaluation coefficient is calculated, and comprehensive evaluation is carried out by comparing comprehensive evaluation indexes. And optimizing the three elements and the comprehensive evaluation coefficient at the same time. According to the invention, a highway industrialization comprehensive evaluation system is established, a highway industrialization construction evaluation standard is provided, highway industrialization quantitative evaluation is realized, and the development of a highway industrialization technology is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to an evaluation method for industrialized green and low-carbon construction of highways. Background Art

[0002] As the pioneer of construction and development, highway engineering has an unprecedented task of "putting transportation first".

[0003] At the same time, the country continues to promote the five major developments of "innovation, coordination, green, openness, and sharing". Specific requirements for the research and development and promotion and application of green and low-carbon technologies have been gradually clarified at all levels. Highway construction is a major consumer of land, materials, and energy and a major carbon emitter in the field of energy conservation and environmental protection. Therefore, "green construction" has a great responsibility.

[0004] In addition, the country's energy and resource shortages are becoming increasingly prominent, and the ecological and environmental protection situation is particularly severe, forming an urgent need for green development. For the sustainable development of road transportation, "innovative models" are imperative.

[0005] Historically, green development and extensive development have been in fierce conflict, and development has paid a huge environmental / economic price. Industrial transformation is the key to solving the current conflict and is the direction of efforts of all countries. How to save resources, protect the environment, improve quality and implement green construction through timely industrial transformation in highway construction has become a top priority. Therefore, the pressure of "transformation and upgrading" is huge.

[0006] In foreign countries, the industrialized construction of highways started early, and there have been studies on the theory of prefabrication and assembly, concrete structures, composite structures, connection structures, process methods and equipment, etc. However, in recent years, there have been few engineering practices and lack of systematic results, and the reference value for the development of domestic highway industrialization has been quite limited.

[0007] In China, there are many achievements in the industrialized construction of highways, but attempts based on traditional theories, structures and management are often short-lived. The standardization, systematization, modularization and informatization of technology are low, the overall benefits of the project are poor, the investment cannot be turned around, the advantages are not large-scale, and the technology is difficult to promote.

[0008] The deep-seated problems are analyzed in the following aspects:

[0009] First, there is a lack of unified design cognition. ① The evaluation standard for industrialized highway construction has not been established. ② The traditional design theory has not been revised to form a new refined design theory.

[0010] Second, the structural components are not suitable. ① The standardization is insufficient and the modularization level is even lower. ② Traditional structures are often divided into sections, and the section structure is complex and difficult to manufacture and install.

[0011] Third, process management is difficult to interact. ① The application of BIM mostly stays at the post-demonstration level. ② Rapid information sharing and mutual correction of design / construction / testing based on BIM has not been formed.

[0012] Based on this, a method for evaluating the industrialized green and low-carbon construction of highways is now provided, which can eliminate the drawbacks of existing devices. Summary of the invention

[0013] The purpose of the present invention is to provide a method for evaluating the industrialized green and low-carbon construction of highways, which solves the problem of inconsistent design cognition in the prior art.

[0014] To achieve the above object, the present invention provides the following technical solutions:

[0015] A method for evaluating the industrialized green and low-carbon construction of a highway comprises the following steps:

[0016] Step 1: Calculate the land-saving degree A of highway industrialization and evaluate the land-saving degree;

[0017] Step 2: Calculate the balance degree B of highway industrialization excavation and fill, and evaluate the balance degree;

[0018] Step 3: Calculate the carbon reduction degree B of highway industrialization and conduct carbon reduction evaluation;

[0019] Step 4: Select the weighted value R of the three factors of land saving degree A, fill-cut balance degree B and carbon reduction degree C for mountainous areas, plain areas and hilly areas respectively A , R B , R C ;

[0020] Step 5: Calculate the comprehensive evaluation coefficient P of highway industrialization;

[0021] Step 6: Select the highway industrialization evaluation index P for mountainous areas, plain areas, and hilly areas respectively S ;

[0022] Step 7: Conduct a comprehensive evaluation of highway industrialization.

[0023] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0024] In an optional solution: in the step 1, the land saving degree A is calculated according to the following formula:

[0025]

[0026] In the formula, A l is the actual area of ​​the highway; A0 is the road surface area;

[0027] Combined with survey statistics and case analysis, the land-saving evaluation is carried out according to the following rules:

[0028] When A≤0.85, land conservation is considered ideal; otherwise, the focus should be on reducing the length of the highway with slope soil roadbed and increasing the length of the non-slope structure.

[0029] In an optional solution: in the step 2, the fill-cut balance B is calculated according to the following formula:

[0030]

[0031] In the formula, B di B is the amount of excavation in each section; fi The volume of segmented filling.

[0032] Combined with survey statistics and case analysis, the evaluation of cut-fill balance is carried out according to the following rules:

[0033] When B≤0.2, the excavation and fill balance is considered ideal; otherwise, the focus should be on adjusting the proportion of the highway soil subgrade and structure length in the highway.

[0034] In an optional solution: in the step 3, the carbon reduction degree C is calculated according to the following formula:

[0035]

[0036] In the formula, C ni is the carbon emission of the sub-item structure after industrialization; C oi It is the carbon emission of the sub-item structure before industrialization; combined with survey statistics and case analysis, the carbon reduction evaluation is carried out according to the following rules:

[0037] When C≤0.95, energy conservation and emission reduction are considered ideal; otherwise, the focus should be on optimizing the structure and construction to reduce the structural cost.

[0038] In an optional solution: In the above step 4, through multiple rounds of questionnaire surveys of all parties involved in the project and calculation and analysis of various factors of successful project cases, the weighted values ​​are selected according to the following rules:

[0039] Mountainous area, = 0.5;

[0040] Plain area, = 0.3;

[0041] Hilly area, =0.2.

[0042] In an optional solution: in step 5, the comprehensive evaluation coefficient P is calculated according to the following formula:

[0043] P=R A ×A+R B ×B+R C ×C.

[0044] In an optional solution: In step 6, through the investigation of the reasonable system of highway industrialization and the analysis of successful engineering cases, the evaluation index P S Use according to the following rules:

[0045] Mountain area, P S =0.705;

[0046] Plain area, P S =0.750;

[0047] Hilly area, P S =0.545.

[0048] In an optional solution: in step 7, the comprehensive evaluation is performed according to the following rules:

[0049] P≤P S When the comprehensive effect of highway industrialization is ideal, the mountainous area, plain area and hilly area should be ranked according to the weighted values ​​of the three factors, and the land saving degree A, the fill-dig balance degree B and the carbon reduction degree C should be optimized in turn to reduce the values ​​of the three factors.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] This application established a comprehensive evaluation system for highway industrialization, solved the problem of inconsistent design cognition, proposed evaluation standards for highway industrialization construction, and realized quantitative evaluation of highway industrialization. It promoted the innovation of design methods and the development of structural technology, and showed significant technical effects and economic and social effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the highway industrialization technology system of the present invention;

[0053] Figure 2 It is a schematic diagram of the highway industrialization evaluation process of the present invention;

[0054] Figure 3 It is a schematic diagram of the overall layout of the highway industrialization of the present invention.

[0055] In the picture: 1-main bridge across the river; 2-approach bridge; 3-earth roadbed. DETAILED DESCRIPTION

[0056] 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.

[0057] like Figure 1-Figure 3 As shown, the embodiment of the present invention provides a method for evaluating the green and low-carbon construction of highway industrialization, see Figure 1 For the construction of a cross-river bridge project, an industrial evaluation system was designed, which included three elements: land saving degree A, fill-cut balance degree B, and carbon reduction degree C. Based on the industrial evaluation system, a complete industrial technology system was further established.

[0058] See also Figure 1 , Figure 2 In the industrialization technology system, industrialization evaluation is carried out in steps. First, the three elements are calculated and evaluated separately. Then, the three elements are weighted and integrated in combination with the characteristics of the engineering hilly area to make a comprehensive evaluation.

[0059] join Figure 3 The total length of the project is 55.5 km, and it faces a series of key issues: First, the complex construction conditions: the project crosses rivers, floodplains, polder areas, and mountains, and the treatment methods for rapids, deep pools, soft soil, and gravel are different. Second, the harsh construction environment: the project crosses waterways, ports, levees, factory areas, urban areas, roads, and railways, and many existing and special standards must be understood and implemented.

[0060] In this regard, we focused on implementing "technical innovation of large-span bridges", "factory construction of large-scale bridges", and "soilless construction of large-scale roadbeds" in the industrialized construction of the project, and conducted repeated evaluations and optimizations, achieving significant results.

[0061] join Figure 3 The main cross-river bridge 1 is designed to be 1,622 meters long, with a main span of 806 meters, a split-column tower, four-cable-plane same-direction rotating cables, and a new structure system of inclined damping restraint cable-stayed bridge. Among them, the concrete of the foundation and tower body is reduced by more than 20% compared with the traditional one. The same-direction rotating cable tower anchor cable uses 350 tons of steel and costs 8.5 million, which is 2 / 3 less than the traditional 1,600 tons and 26 million. The cost of the inclined damping restraint system is reduced by more than 40% compared with the traditional one, about 5.5 million. Overall, the main cross-river bridge 1 produces 1.34083 billion carbon emissions, which is 85.2 million less than the traditional one.

[0062] Approach Bridge 2 is 35km long, of which 28km is a new type of all-over external prestressed segmental box girder bridge with a span of 30-55m, which realizes the standardized, lightweight and rapid construction of 20,000 prefabricated bridges. Overall, Approach Bridge 2 generates 2.32 billion carbon emissions, which is 450 million less than the traditional ones.

[0063] The length of the earth roadbed is 18km. The length of one tunnel is 0.35km. The whole line has achieved a balance between filling and excavation.

[0064] Firstly, the three factors that directly reflect the industrialization goal of the project, namely, land saving degree A, fill-excavation balance degree B and carbon reduction degree C, are calculated and evaluated respectively.

[0065] Land saving degree A:

[0066] This shows that the project adopts bridge structure on a large scale, which is ideal for saving land.

[0067] Cut-fill balance It shows that the excavation and filling design of the engineering soil roadbed, tunnel and slope is scientific, the comprehensive utilization of earth and stone is reasonable, and the excavation and filling balance is ideal.

[0068] Carbon reduction This shows that the project adopted innovative structural technology, which effectively reduced the project cost, correspondingly reduced resource consumption and carbon emissions, and achieved ideal energy conservation and emission reduction.

[0069] Then, a weighted synthesis and evaluation of the three factors that reflect the overall effect of engineering industrialization are carried out.

[0070] The project is located in a hilly area. The corresponding weighted values ​​of land saving degree A, fill-cut balance degree B and carbon reduction degree C are R A , R B , R C The value is, R A =0.3, R B =0.5, R C =0.2.

[0071] Comprehensive evaluation coefficient P:

[0072] P=R A ×A+R B ×B+R C ×C=0.3×0.188+0.5×0+0.2×0.8725=0.2309<<P S

[0073] =0.545, indicating that the project focuses on industrialized construction of "technical innovation of large-span bridges", "factory construction of large-scale bridges", and "soilless construction of large-scale roadbeds", with an ideal overall effect.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for evaluating the green and low-carbon construction of industrialized highways, characterized by: The following steps are involved: Step 1: Calculate the land-saving degree A of highway industrialization and evaluate the land-saving degree; Step 2: Calculate the balance degree B of highway industrialization excavation and fill, and evaluate the balance degree; Step 3: Calculate the carbon reduction degree C of highway industrialization and evaluate the carbon reduction degree; Step 4: Select the weighted value R of the three factors of land saving degree A, fill-cut balance degree B and carbon reduction degree C for mountainous areas, plain areas and hilly areas respectively A , R B , R C ; Step 5: Calculate the comprehensive evaluation coefficient P of highway industrialization; Step 6: Select the highway industrialization evaluation index P for mountainous areas, plain areas, and hilly areas respectively S ; Step 7: Conduct a comprehensive evaluation of highway industrialization.

2. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In the step 1, the land saving degree A is calculated according to the following formula: In the formula, A1 is the actual area of ​​the highway; A0 is the road surface area; Combined with survey statistics and case analysis, the land-saving evaluation is carried out according to the following rules: When A≤0.85, land conservation is considered ideal; otherwise, the focus should be on reducing the length of the highway with slope soil roadbed and increasing the length of the non-slope structure.

3. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In step 2, the fill-cut balance degree B is calculated according to the following formula: In the formula, B di B is the amount of excavation in each section; fi The volume of segmented filling. Combined with survey statistics and case analysis, the evaluation of cut-fill balance is carried out according to the following rules: When B≤0.2, the excavation and fill balance is considered ideal; otherwise, the focus should be on adjusting the proportion of the highway soil subgrade and structure length in the highway.

4. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In the step 3, the carbon reduction degree C is calculated according to the following formula: In the formula, C ni C is the carbon emission of the sub-item structure after industrialization; oi It is the carbon emission of the sub-item structure before industrialization; combined with survey statistics and case analysis, the carbon reduction evaluation is carried out according to the following rules: When C≤0.95, energy conservation and emission reduction are considered ideal; otherwise, the focus should be on optimizing the structure and construction to reduce the structural cost.

5. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In step 4, through multiple rounds of questionnaire surveys on all parties involved in the project and calculation and analysis of various factors of successful project cases, the weighted values ​​are selected according to the following rules: Mountainous area, = 0.5; Plain area, = 0.3; Hilly area, =0.

2.

6. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In step 5, the comprehensive evaluation coefficient P is calculated according to the following formula: P=R A ×A+R B ×B+R C ×C。 7. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In step 6, the evaluation index P is evaluated by investigating the reasonable system of highway industrialization and analyzing successful engineering cases. S Use according to the following rules: Mountain area, P S =0.705; Plain area, P S =0.750; Hilly area, P S =0.

545.

8. The method for evaluating the industrialized green and low-carbon construction of highways according to claim 1 is characterized in that: In step 7, the comprehensive evaluation is performed according to the following rules: P≤P S When the comprehensive effect of highway industrialization is ideal, the mountainous area, plain area and hilly area should be ranked according to the weighted values ​​of the three factors, and the land saving degree A, the fill-dig balance degree B and the carbon reduction degree C should be optimized in turn to reduce the values ​​of the three factors.

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