Pavement maintenance method and system, and medium

Abstract

A pavement maintenance method and system, and a medium. The pavement maintenance method comprises: for obtained alternative maintenance plans for a road section pavement in a road network, calculating an investment benefit index in a maintenance planning period of each alternative maintenance plan; and selecting an alternative maintenance plan with the maximum investment benefit index in the maintenance planning period as a maintenance plan of the road section pavement in the road network. The calculation formula of an investment benefit index is: LIBI=a*RCI+b*PPI+c*EAI+d*ENI, wherein LIBI represents an investment benefit index of a maintenance planning period, RCI represents an economic index, PPI represents a road condition index, EAI represents an energy consumption index, ENI represents an engineering index, a, b, c and d represent the weights of the economic index, the road condition index, the energy consumption index and the engineering index, and the weights of the economic index, the road condition index, the energy consumption index and the engineering index are changed on the basis of a highway classification of a road section and the use time of the road section.

Description

A road maintenance method, medium and system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 20, 2023, with application number 202310736118.X, entitled “A pavement maintenance method, medium and system”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the technical field of pavement maintenance, and in particular to a pavement maintenance method, medium and system. Background Art

[0004] In actual pavement maintenance design, the maintenance needs of the road network are analyzed. There will be many sections in the road network that require maintenance and repair to varying degrees. The existing maintenance planning and design work is still mainly based on manual experience judgment. The main process is: Step 1: Based on the current road conditions, formulate a maintenance plan for the year based on experience. Step 2: Based on the maintenance plan of the previous year, calculate the road conditions for the next year, and require that the road conditions after maintenance meet certain standards. Step 3: Repeat steps 1-2 until the end of the maintenance planning period. Step 4: Qualitatively evaluate the planning results based on experience. If the expected results are not met, repeat steps 1-3 until the maintenance plan results meet certain requirements during the planning period.

[0005] Existing technologies primarily focus on road condition assessment, supplemented by investment cost analysis. Roads are evaluated using various road condition indices and maintenance plans are designed based on the degree of damage. Severely damaged sections are repaired first, while less damaged sections are repaired later. However, in actual road network maintenance plan design, the optimal plan must be selected based on the overall technical condition index and investment returns of the road network. In actual maintenance plans, the most severely damaged sections may not be included in the current year's maintenance plan, but will be repaired in another year within the maintenance planning period.

[0006] Therefore, when repairing roads, it is important to consider factors such as how to determine the sections to be repaired this year and the order in which they should be repaired within the planned maintenance period. This can ensure that the investment return of the repair plan is maximized, and that the maximum number of sections can be repaired with the least amount of funds while meeting the requirements of the pavement technical condition index. Existing technologies lack maintenance plans that comprehensively consider these factors, resulting in poor overall results.

[0007] Summary of the Invention

[0008] The embodiments of the present invention provide a pavement maintenance method, medium, and system to solve the problem that the prior art fails to consider factors such as maintenance effect and cost simultaneously, resulting in poor overall maintenance effect.

[0009] In a first aspect, a pavement maintenance method is provided, comprising:

[0010] For the alternative maintenance plans obtained for the road sections in the road network, calculate the investment benefit index of each alternative maintenance plan during the maintenance planning period;

[0011] Select the alternative maintenance plan with the largest investment benefit index during the maintenance planning period as the maintenance plan for the road surface of the road network;

[0012] The calculation formula for the investment benefit index during the maintenance planning period includes:

[0013] LIBI=a*RCI+b*PPI+c*EAI+d*ENI;

[0014] Among them, LIBI represents the investment benefit index during the maintenance planning period, RCI represents the economic index, PPI represents the road condition index, EAI represents the energy consumption index, ENI represents the engineering index, and a, b, c, and d represent the weights of the economic index, road condition index, energy consumption index, and engineering index, respectively.

[0015] Among them, the weights of the economic index, road condition index, energy consumption index and engineering index vary based on the highway grade of the road section and the time the road section is used.

[0016] In a second aspect, a computer-readable storage medium is provided, on which computer program instructions are stored; when the computer program instructions are executed by a processor, a pavement maintenance method as in the embodiment of the first aspect is implemented.

[0017] In a third aspect, a pavement maintenance system is provided, comprising: a computer-readable storage medium as in the embodiment of the second aspect.

[0018] In this way, the embodiment of the present invention comprehensively evaluates the investment plan from the four aspects of technology, economy, social impact and energy emissions, and dynamically changes the weights of the indicators in the four aspects according to the different highway grades and road section usage time, so that the maintenance plan can be evaluated more accurately, so as to select the maintenance plan with the best comprehensive effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] FIG1 is a flow chart of a pavement maintenance method according to an embodiment of the present invention;

[0021] FIG2 is a flow chart of obtaining alternative maintenance plans through computer programming according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0023] The embodiment of the present invention discloses a road maintenance method. As shown in FIG1 , the method of the embodiment of the present invention includes the following steps:

[0024] Step S101: For the acquired alternative maintenance plans for the road sections in the road network, calculate the investment benefit index of each alternative maintenance plan during the maintenance planning period.

[0025] The embodiment of the present invention proposes evaluation indexes from four aspects: technical level, economic level, social impact level, and energy emission level. At the same time, according to the degree of influence of each index on the current maintenance decision, a weight coefficient is assigned, and the investment benefit index of the maintenance planning period is calculated, thereby realizing the scientific quantitative evaluation of pavement maintenance decision-making.

[0026] 1. Economic evaluation index - economic index

[0027] The economic index mainly includes three items: maintenance project investment, minor repair and maintenance costs, and road surface residual value.

[0028] 1. Maintenance project investment includes: initial investment, major and medium repairs during the life cycle, and preventive maintenance project investment, etc.

[0029] 2. Minor repair and maintenance costs include: annual expenses necessary to maintain the normal use of the road surface, which should be related to the nature of the maintenance project. For heavy maintenance projects, the minor repair and maintenance costs in subsequent years should be lower than the minor repair and maintenance costs required for light maintenance projects.

[0030] 3. Pavement residual value includes: the difference between the pavement performance index and the maintenance standard at the end of the maintenance planning period, which is converted into the remaining cost of the maintenance plan to calculate the pavement residual value.

[0031] The cost of the maintenance planning period in the embodiment of the present invention is the sum of these three costs during the maintenance planning period.

[0032] Specifically, the calculation formula of the economic index is:

[0033] Among them, R Arepresents the cost of the maintenance planning period of the alternative maintenance plan, R B represents the cost of the maintenance planning period of the baseline maintenance plan, a1 and a2 represent the first parameter and the second parameter respectively. In a specific embodiment, a1=2.85, a2=1.95.

[0034] Because an investment benefit index (BPI) needs to be constructed based on the maintenance planning period of highway maintenance projects in the region being calculated, the resulting index needs to be representative and widely applicable. Therefore, users must develop a baseline maintenance plan applicable to all road sections during the maintenance planning period, based on the highway construction structure and maintenance project characteristics of the region being calculated. This plan represents the highest standard for highway maintenance in the region, and the cost-effectiveness of other plans is compared with it to calculate their own BPI. For example, the baseline maintenance plan could be one that maintains every road section annually.

[0035] 2. Technical Evaluation Index - Road Condition Index

[0036] The technical level evaluation index mainly compares the average road condition index during the maintenance planning period. Since the road usage condition includes four indices, namely, damage condition PCI, ride quality RQI, rutting condition RDI and anti-skid performance SRI, the embodiment of the present invention adopts the road usage performance index PQI as the final index for evaluating the technical effect.

[0037] Specifically, the calculation formula of the road condition index is:

[0038] Among them, P A represents the mean PQI value of the maintenance planning period of the alternative maintenance scheme, P B represents the PQI mean value of the maintenance planning period of the baseline maintenance plan, a3 and a4 represent the third parameter and the fourth parameter respectively. In a specific embodiment, a3=19.9, a4=19.

[0039] Among them, the calculation formula of PQI is: PQI=ω PCI PCI+ω RQI RQI+ω RDI RDI+ω SRI SRI.

[0040] Among them, PCI represents the pavement damage index, RQI represents the pavement ride quality index, RDI represents the pavement rutting depth index, SRI represents the pavement skid resistance index, ω PCI 、ω RQI 、ω RDI 、ω SRI The table below shows the weights of PCI, RQI, RDI, and SRI. The weights can be set based on experience. PCI, RQI, RDI, and SRI can be determined based on known standards.

[0041] 3. Social Benefit Evaluation Index - Energy Consumption Index

[0042] Generally, the social benefits of maintenance projects include factors such as vehicle wear and tear, time costs, and fuel consumption. Due to the difficulty of calculating these indices, their accuracy requires further verification. Currently, there is no authoritative and highly operational calculation method. Therefore, the present embodiment simplifies this index, focusing on comparing and analyzing the types and number of maintenance projects carried out during the period. By assigning a value to the impact of each type of maintenance project on social benefits, it indirectly reflects the impact of maintenance projects implemented during the maintenance planning period on social benefits.

[0043] Specifically, the calculation formula of the energy consumption index is:

[0044] Among them, E A The energy consumption index of the maintenance planning period of the alternative maintenance plan, E B represents the energy consumption index of the maintenance planning period of the baseline maintenance plan, a5 and a6 represent the fifth parameter and the sixth parameter respectively. In a specific embodiment, a5=0.88 and a6=0.2.

[0045] When pavement maintenance is carried out, maintenance measures bring about energy consumption. The energy consumption index of the maintenance planning period refers to the sum of the energy consumption of all maintenance measures carried out during the maintenance planning period.

[0046] IV. Energy Consumption and Emissions Evaluation Index – Engineering Index

[0047] Utilizing a maintenance project energy consumption database built through tracking and observing the energy conservation and emission reduction benefits of highway maintenance projects, we calculated the energy consumption generated by maintenance projects over the entire life cycle of this road section. Using the energy consumption index for the maintenance planning period, we quantitatively evaluated the benefits of maintenance projects in terms of energy consumption and emissions.

[0048] The calculation formula of engineering index is:

[0049] Among them, E C The engineering coefficient of the maintenance planning period of the alternative maintenance plan, E D The engineering coefficient of the maintenance planning period of the baseline maintenance plan is represented by a7 and a8, which represent the seventh parameter and the eighth parameter, respectively. In a specific embodiment, a7 = 1.48 and a8 = 0.55.

[0050] Each maintenance measure can have its own engineering coefficient set based on experience. The specific maintenance measures in the maintenance plan have different engineering coefficients. The engineering coefficients for different maintenance measures can be set based on experience. The engineering coefficient for the maintenance planning period is the sum of all engineering coefficients performed during the maintenance planning period. For example, if the engineering coefficient for one maintenance measure is 1, if two maintenance measures are performed in the same year, the engineering coefficient is 2.

[0051] Specifically, the calculation formula for the investment benefit index during the maintenance planning period includes:

[0052] LIBI=a*RCI+b*PPI+c*EAI+d*ENI;

[0053] Among them, LIBI represents the investment benefit index during the maintenance planning period, RCI represents the economic index, PPI represents the road condition index, EAI represents the energy consumption index, ENI represents the engineering index, and a, b, c, and d represent the weights of the economic index, road condition index, energy consumption index, and engineering index, respectively.

[0054] Highways mainly serve cars, emphasizing driving experience, driving safety and comfort. Taking into account traffic volume and traffic intensity (the proportion of heavy vehicles), the service life corresponding to different highway grades are: 15 years for expressways and first-class highways, 12 years for second-class highways, 8 years for third-class highways, and 6 years for fourth-class highways.

[0055] It is worth noting that: First, as roads age, the impact of the four evaluation indices on road conditions will change accordingly. Second, different road classifications focus on different road conditions, and the weighting of the four indices will also vary.

[0056] Expressways are the highest-level highways, fully gated and designed for high-speed, divided-lane travel. They primarily connect politically, economically, and culturally important cities and regions, forming the backbone of the national highway network. Class-I highways, designed for vehicles traveling in different directions and lanes, implement localized traffic controls and feature localized interchanges. They primarily connect important political and economic centers and key industrial and mining areas, and are considered national trunk highways. Expressways and Class-I highways have an average annual daytime and nighttime traffic volume of approximately 30,000 vehicles, requiring them to maintain consistently excellent road conditions. The weighting of the road condition index should be weighted accordingly. Meanwhile, maintenance costs and engineering workload will increase as road condition requirements improve. Engineering workload should be minimized while ensuring satisfactory road conditions and costs, aiming for expedited opening to traffic. Energy consumption should be minimized while maintaining excellent road conditions. As roads age, the frequency of maintenance required increases, so the weighting of the road condition index can be appropriately reduced, while the weighting of maintenance costs should be appropriately increased.

[0057] The average annual daytime and nighttime traffic volume on secondary roads is approximately 3,000 to 7,500 vehicles, and the weights of the road condition index and maintenance costs can be appropriately relaxed.

[0058] Class III highways are general trunk roads connecting counties and towns above the county level, with an average daytime and nighttime traffic volume of about 1,000 to 4,000 vehicles. The weights of road condition index and maintenance costs can be appropriately relaxed.

[0059] Class IV highways are branch roads connecting counties, townships, and villages. They have an average annual daytime and nighttime traffic volume of less than 1,500 vehicles on two-lane roads and less than 200 vehicles on a single lane. Since these roads have relatively low road condition requirements, the weighting of the road condition index and maintenance costs can be appropriately relaxed.

[0060] Therefore, the weights of the economic index, road condition index, energy consumption index, and engineering index vary based on the highway grade and age of the road section. Based on the degree of influence of each evaluation index on maintenance project decisions for highways of different grades, the weights of each evaluation index in the investment benefit index during the maintenance planning period can be determined as a function of age. The specific changes are as follows:

[0061] 1. The road grade of the section is expressway or first-class highway

[0062] 1. When the road grade of a road section is an expressway or a first-class highway, and the use time of the road section is the first time range, the weights of the economic index, road condition index, energy consumption index, and engineering index are set according to the first index rule.

[0063] In a specific embodiment, the first time range is 1 to 10 years, and the first exponential rule is: a=0.35, b=0.5, c=0.05, d=0.1.

[0064] 2. When the road grade of the road section is an expressway or a first-class highway, and the use time of the road section is the second time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the second index rule.

[0065] In a specific embodiment, the second time range is 11 to 13 years, and the second exponential rule is: a=0.4, b=0.45, c=0.05, d=0.1.

[0066] 3. When the road grade of a road section is an expressway or a first-class highway, and the use time of the road section is the third time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the third index rules.

[0067] In a specific embodiment, the third time range is 14 to 15 years, and the third exponential rule is: a=0.45, b=0.4, c=0.05, d=0.1.

[0068] 2. The road grade of the section is Class II highway

[0069] 1. When the highway grade of a road section is a secondary highway and the usage time of the road section is the fourth time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the fourth index rules.

[0070] In a specific embodiment, the fourth time range is 1 to 8 years, and the fourth exponential rule is: a=0.3, b=0.4, c=0.1, d=0.2.

[0071] 2. When the highway grade of a road section is a secondary highway and the usage time of the road section is the fifth time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the fifth index rules.

[0072] In a specific embodiment, the fifth time range is 9 to 12 years, and the fifth exponential rule is: a=0.35, b=0.35, c=0.1, d=0.2.

[0073] 3. The road grade of the section is Class III highway

[0074] When the highway grade of a road section is a third-class highway and the use time of the road section is the sixth time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the sixth index rule.

[0075] In a specific embodiment, the sixth time range is 1 to 8 years, and the sixth index rule is: a=0.35, b=0.35, c=0.1, d=0.2.

[0076] 4. The road grade of the section is Class IV highway

[0077] When the highway grade of a road section is a fourth-class highway and the use time of the road section is the seventh time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the seventh index rule.

[0078] In a specific embodiment, the seventh time range is 1 to 6 years, and the seventh index rule is: a=0.4, b=0.3, c=0.1, d=0.2.

[0079] Step S102: selecting the alternative maintenance plan with the largest investment benefit index during the maintenance planning period as the maintenance plan for the road surface of the road section in the road network.

[0080] The above steps, through quantitative analysis, can screen out the maintenance plan with the best overall effect, avoiding the uncertainty brought about by empirical judgment in existing technologies.

[0081] Preferably, before step S101, the method of the embodiment of the present invention further includes:

[0082] 1. Based on the pavement performance index of each road section in the road network in each year during the maintenance planning period, determine whether the road surface of each road section needs maintenance and determine the maintenance measures when maintenance is necessary, and obtain an initial alternative maintenance plan consisting of maintenance measures for each year.

[0083] Maintenance measures are typically developed by maintenance personnel after conducting index testing on actual road sections. For example, minor repairs might be appropriate for sections with no significant issues; milling might be appropriate for sections with numerous cracks but no structural issues; and overlaying might be appropriate for sections with insufficient structural strength. Different maintenance measures result in different economic costs, energy consumption, and engineering coefficients.

[0084] 2. Select an initial alternative maintenance plan that meets the screening criteria to obtain an alternative maintenance plan.

[0085] Specifically, the screening criteria include: after the road surface of the road section in the road network is maintained through the maintenance measures of the current year in the initial alternative maintenance plan, the average pavement performance index of the road section in the road network is less than a preset index value.

[0086] The preset index value may be set based on experience, for example, the preset index value is 80.

[0087] Generally, if the road surface of a road section in the road network is maintained through the maintenance measures of the current year in the initial alternative maintenance plan, the pavement performance index of the maintained road section will return to the standard value, and the pavement performance index of the unmaintained road section will decrease by the preset value.

[0088] For example, if the standard value is 100 and the preset value is 5, then after the road section is maintained, the pavement performance index of the road section will be restored to 100; if the road section is not maintained, the pavement performance index of the road section will be reduced by 5.

[0089] The above process can be designed into the following steps so as to be implemented by computer programming, as shown in Figure 2:

[0090] Step 1: Maintenance needs analysis:

[0091] (1) The road maintenance design units are divided according to factors such as pavement type, cross-sectional form, maintenance history, traffic conditions, pavement technical conditions, and maintenance type (JTG 5421-2018), and the number of road section units is set to R'.

[0092] (2) Set the maintenance planning period to P. In the embodiment of the present invention, the maintenance planning period is any number of years, subject to the design of the maintenance personnel. In the embodiment of the present invention, the maintenance planning period means: within this number of years, the average annual PQI value of the road network as a whole must meet the standard.

[0093] (3) The minimum value that the average PQI of the road network as a whole must reach each year during the maintenance planning period is α. If α is not reached, the maintenance plan is unqualified. r When it is needed maintenance.

[0094] Step 2: Year 1 of the maintenance planning period

[0095] (1) Calculate the number of road section units that need maintenance according to the original road condition information, that is, the road section unit PQI < α r The number of road section units is set to R.

[0096] (2) According to the principle that “sections with maintenance needs can choose to be maintained or not, and sections without maintenance needs are not maintained at all”, the maintenance plan set for that year is calculated, that is, the number of all possible maintenance plans is 2 R .

[0097] (3) After each maintenance plan is completed, calculate whether the average PQI of the road network in this year is greater than or equal to α. If it is less than α, calculate the next maintenance plan. If the plan meets the requirements, record the plan number as i1 and save the plan as plan A. 1-i11 , p is the number of years in the maintenance planning period.

[0098] (4) Calculate all maintenance plans for this year as required, and the number of maintenance plans that meet the requirements is i1.

[0099] (5) Determine whether i1 is greater than 0, that is, whether there is a maintenance plan that meets the requirements under the designed PQI rules. If no plan meets the requirements, there is a problem with the PQI assignment and it needs to be redesigned.

[0100] (6) When i1 is not 0, determine whether it is the first year of the planning period. If so, set the parameter c number to be plus 1 and enter the second year of the planning period.

[0101] (7) Calculation of the Post-Maintenance PQI: The PQI of a maintained road section is restored to a full score of 100. The PQI of an unmaintained road section decays according to the decay law (for example, the PQI of an unmaintained road section will decay by 5 the following year). The PQI of the entire road network is calculated by summing the PQIs of all road sections after maintenance and taking the average.

[0102] (8) Save Plan A 1-i11Next, determine the current year of the maintenance planning period. If the end of the planning period has not yet been reached, continue calculating the required maintenance plan. If the end of the period has been reached, record the plan number as a. This step calculates the number of plans that meet the PQI in each year of the planning period, that is, the number of available maintenance plans within the planning period. Subsequently, find the optimal maintenance plan among these a plans, with the lowest investment and the longest maintenance mileage.

[0103] Step 3: Second year of maintenance planning period

[0104] (1) Replace p with parameter j and replace i with parameter c p , j starts from 1 and increases by 1, c starts from 0 and increases by 1. According to scheme A j-cj (i.e. A 1-c1 ) Update the second-year road condition information, update the number of required road units R, and recalculate the set of maintenance plans. The goal is to calculate all possible second-year maintenance plans based on the road condition information after the first year of maintenance.

[0105] (2) After the calculation is completed, save the possible maintenance plan i2 for the second year.

[0106] (3) Determine whether it is the second year of the planning period. If so, continue to determine whether the parameter c increases to i1. If not, set p-1 and c+1. ​​The purpose is to traverse A j-cj , respectively according to A 1-c1 Maintenance road conditions to screen the second year's maintenance plan A 2-i22 , at this time each A 1-c1 When parameter c equals i1, all maintenance plans for the second year have been calculated and possible plans have been selected. Let j + 1 and c = 1 to start the calculation for the third year.

[0107] Step 4: Year 3 and above within the maintenance planning period

[0108] (1) Starting from the second year, each plan A p-ipp There will be an i p Therefore, it is necessary to first detect the number S of the same scheme number, and then loop the calculation S times. After all schemes with the same number as this scheme are calculated, the calculation of the next numbered scheme can be performed.

[0109] (2) After all the solutions for a certain number are calculated, determine whether the parameter c is equal to i p-1 If the maximum value is not reached, continue to calculate. If the maximum value is reached, then all maintenance plans for year p are calculated and the calculation for year p+1 begins. p In this case, it is necessary to calculate all the maintenance plans together.

[0110] Step 5: End of maintenance planning period

[0111] When the calculation of the maintenance plan for the last year of the planning period is completed, the program will continue to increase the p value to P+1. At this time, A j-cj The number of is 0. At this time, all maintenance plans that meet the conditions have been preliminarily screened and the investment benefit index of the maintenance planning period can be calculated.

[0112] Through the above steps, alternative maintenance plans can be screened. Furthermore, this data processing method does not require a specific maintenance planning period (P). Maintenance personnel can set the P value based on their needs. The logic and steps are clear, making it easy to code. The extensive computations involved can be performed by computers, facilitating the development of specialized maintenance plan modules within existing highway big data platforms, laying the foundation for highway management and decision-making.

[0113] In addition, an embodiment of the present invention further provides a computer-readable storage medium having computer program instructions stored thereon; when the computer program instructions are executed by a processor, the pavement maintenance method as described in the above embodiment is implemented.

[0114] In addition, an embodiment of the present invention further provides a road surface maintenance system, including: a computer-readable storage medium as described in the above embodiment.

[0115] The solution of the embodiment of the present invention is further described below with a specific application example.

[0116] This application example sets the maintenance planning period to 15 years.

[0117] Based on the characteristics of a province's expressway construction structure and maintenance projects, a baseline maintenance plan applicable to all sections was developed. This plan serves as the highest standard for expressway maintenance in the province. The cost-effectiveness of other plans was compared with this plan to calculate its own investment benefit index. The baseline maintenance plan for the planned maintenance period is shown in Table 1.

[0118] Table 1 Basic maintenance plan

[0119] The unit price of each maintenance measure is shown in Table 2.

[0120] Table 2 Unit price of each maintenance measure

[0121] The costs of the maintenance planning period for the baseline maintenance plan and the alternative maintenance plan are shown in Table 3 and Table 4 respectively.

[0122] Table 3 Costs of the maintenance planning period for the baseline maintenance plan

[0123] Table 4 Costs of the maintenance planning period for alternative maintenance options

[0124] The economic indices of the alternative maintenance options are shown in Table 5.

[0125] Table 5 Economic indexes of alternative maintenance options

[0126] The changes in pavement performance during the maintenance planning period of the baseline maintenance scheme are shown in Table 6.

[0127] Table 6 Changes in pavement performance during the maintenance planning period of the baseline maintenance plan

[0128] The changes in pavement performance under the alternative maintenance schemes are shown in Table 7.

[0129] Table 7 Changes in pavement performance under alternative maintenance schemes

[0130] The mean PQI values ​​of the alternative maintenance options are shown in Table 8.

[0131] Table 8 PQI mean values ​​of alternative maintenance plans

[0132] Table 9 Road condition index of alternative maintenance plans

[0133] The energy consumption during the maintenance planning period of the alternative and baseline maintenance plans is shown in Table 10.

[0134] Table 10 Energy consumption during the maintenance planning period of the alternative and baseline maintenance plans

[0135] The energy consumption index of the alternative maintenance options is shown in Table 11.

[0136] Table 11 Energy consumption index of alternative maintenance schemes

[0137] The engineering coefficients of the maintenance planning period for the alternative maintenance scheme and the baseline maintenance scheme are shown in Table 12.

[0138] Table 12 Engineering coefficients of the maintenance planning period for alternative maintenance plans and standard maintenance plans

[0139] The engineering indexes of the alternative maintenance options are shown in Table 13.

[0140] Table 13 Engineering index of alternative maintenance schemes

[0141] The evaluation indexes of the alternative maintenance plans are shown in Table 14.

[0142] Table 14 Evaluation indexes of alternative maintenance plans

[0143] Table 15 Investment benefit index of alternative maintenance schemes during the maintenance planning period

[0144] The alternative maintenance plan with the largest investment benefit index during the maintenance planning period is selected as the final maintenance plan, that is, plan 1 is selected as the final maintenance plan.

[0145] In summary, the embodiments of the present invention comprehensively evaluate investment plans from four aspects: technology, economy, social impact, and energy emissions. The weights of the indicators in these four aspects are dynamically changed according to the highway grade and the usage time of the road section, thereby more accurately evaluating the maintenance plan and selecting the maintenance plan with the best overall effect.

[0146] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A road maintenance method, characterized in that: include: For the obtained alternative maintenance plans for the road sections in the road network, calculate the investment benefit index of the maintenance planning period of each of the alternative maintenance plans; Selecting the alternative maintenance plan with the largest investment benefit index during the maintenance planning period as the maintenance plan for the road surface of the road section in the road network; The calculation formula of the investment benefit index during the maintenance planning period includes: LIBI=a*RCI+b*PPI+c*EAI+d*ENI; Among them, LIBI represents the investment benefit index during the maintenance planning period, RCI represents the economic index, PPI represents the road condition index, EAI represents the energy consumption index, ENI represents the engineering index, and a, b, c, and d represent the weights of the economic index, road condition index, energy consumption index, and engineering index, respectively; Among them, the weights of the economic index, road condition index, energy consumption index and engineering index vary based on the highway grade of the road section and the time the road section is used.

2. The pavement maintenance method according to claim 1, characterized in that: When the road grade of the road section is an expressway or a first-class highway, the use time of the road section is the first time range, and the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the first index rule; When the road grade of the road section is an expressway or a first-class road, and the use time of the road section is the second time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the second index rule; When the highway grade of the road section is an expressway or a first-class highway, the use time of the road section is the third time range, and the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the third index rule.

3. The pavement maintenance method according to claim 1, characterized in that: When the highway grade of the road section is a secondary highway and the use time of the road section is the fourth time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the fourth index rule; When the highway grade of the road section is a secondary highway, the use time of the road section is the fifth time range, and the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the fifth index rule.

4. The pavement maintenance method according to claim 1, characterized in that: When the highway grade of a road section is a third-level highway and the use time of the road section is the sixth time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the sixth index rule.

5. The pavement maintenance method according to claim 1, characterized in that: When the highway grade of a road section is a Class IV highway and the use time of the road section is the seventh time range, the weights of the economic index, road condition index, energy consumption index and engineering index are set according to the seventh index rule.

6. The pavement maintenance method according to claim 1, characterized in that: The calculation formula of the economic index is: R A represents the cost of the maintenance planning period of the alternative maintenance plan, R B represents the cost of the maintenance planning period of the baseline maintenance plan, a1 and a2 represent the first parameter and the second parameter respectively; The calculation formula of the road condition index is: P A represents the mean PQI value of the maintenance planning period of the alternative maintenance scheme, P B represents the mean value of PQI during the maintenance planning period of the baseline maintenance scheme, a3 and a4 represent the third and fourth parameters, respectively; The calculation formula of the energy consumption index is: E A The energy consumption index of the maintenance planning period of the alternative maintenance plan, E B represents the energy consumption index of the maintenance planning period of the baseline maintenance plan, a5 and a6 represent the fifth parameter and the sixth parameter respectively; The calculation formula of the engineering index is: E C The engineering coefficient of the maintenance planning period of the alternative maintenance solution, E D It represents the engineering coefficient of the maintenance planning period of the benchmark maintenance scheme. a7 and a8 represent the seventh parameter and the eighth parameter respectively.

7. The pavement maintenance method according to claim 1, characterized in that: Before the step of calculating the investment benefit index of the maintenance planning period of each of the alternative maintenance plans, the method further comprises: According to the pavement performance index of each road section in the road network in each year during the maintenance planning period, determine whether the pavement of each road section needs maintenance and determine the maintenance measures when maintenance is needed, and obtain an initial candidate maintenance plan consisting of the maintenance measures for each year; Selecting the initial candidate maintenance plan that meets the screening criteria to obtain the candidate maintenance plan; Among them, the screening criteria include: after maintaining the road surface of the road section in the road network through the maintenance measures of the current year in the initial alternative maintenance plan, the average of the pavement performance index of the road section in the road network is less than a preset index value.

8. The road surface maintenance method according to claim 7, characterized in that: If the road surface of the road section in the road network is maintained by the maintenance measures of the current year in the initial alternative maintenance plan, the pavement performance index of the maintained road section will be restored to the standard value, and the pavement performance index of the unmaintained road section will decrease by a preset value.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, the pavement maintenance method according to any one of claims 1 to 8 is implemented.

10. A road maintenance system, characterized in that: include: The computer readable storage medium of claim 9.

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