BIM-based municipal highway permeability simulation test method

Abstract

The present invention relates to the field of data processing technology, and more specifically to a BIM-based municipal highway permeability simulation test method, comprising: obtaining the moisture content at different slope heights on a daily basis; analyzing the impact of capillary phenomena on moisture content within the slope pavement under different temperatures and humidities to obtain a seasonal environmental impact coefficient; matching to obtain sliding water content matching pairs of slope heights; screening sliding water content matching pairs with similar moisture contents to obtain a daily constant sliding height; analyzing the positional relationship of the slope heights and combining them with the seasonal environmental impact coefficient to obtain a seasonal constant permeability coefficient; utilizing the pressure effect of the moisture content at the constant sliding height to obtain a comprehensive permeability impact degree for each slope height; and utilizing the comprehensive permeability impact degree to conduct a municipal highway permeability simulation test. The present invention aims to address the problem of low permeability test accuracy due to seasonal influences on slope pavements, thereby improving the accuracy of permeability simulation tests.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a BIM-based municipal highway water permeability simulation test method. Background Art

[0002] Good water permeability in highway pavements can effectively solve roadbed drainage problems, improve road skid resistance, and reduce the probability of accidents. Therefore, before building municipal highways, water permeability testing is necessary. Existing technologies typically utilize BIM models to construct virtual municipal highway models. By simulating and analyzing various data related to water permeability testing in the BIM models, comprehensive water permeability testing results are obtained.

[0003] Municipal pavement foundations in cities often have slopes. In addition to seeping downward, water on the slopes is also affected by the seasons, causing the surface water to slide inside and on the slope. This results in varying pressures and capillary phenomena on slopes at different heights. The water permeability test for the pavement is conducted by analyzing the water accumulation and infiltration of slopes at the same height using a model. However, this does not take into account the accumulation and capillary phenomena caused by the different heights of water on the slopes in different seasons, reducing the accuracy of the BIM model for highway pavement permeability testing. Summary of the Invention

[0004] The present invention provides a municipal highway permeability simulation test method based on BIM to solve existing problems.

[0005] The BIM-based municipal highway water permeability simulation test method of the present invention adopts the following technical solutions:

[0006] One embodiment of the present invention provides a BIM-based municipal highway water permeability simulation test method, the method comprising the following steps:

[0007] A permeability model for sloped pavement is constructed using prior temperature and humidity to obtain the moisture content at different slope heights on each day. The prior temperature and humidity vary from day to day.

[0008] Analyze the effect of capillary phenomena on moisture content in slope pavement at different temperatures and humidities, and obtain seasonal environmental impact coefficients for each slope height;

[0009] The moisture content of all slope heights on adjacent days was matched to obtain matching pairs of falling water content for each slope height each day. The approximate relationship between the moisture content in the falling water content matching pairs was used to reflect the characteristics of moisture content in the same season. Falling water content matching pairs with similar moisture content were selected to obtain the constant falling height for each day. The relative position relationship between the same slope height and the constant falling height on all days was analyzed, and combined with the seasonal environmental impact coefficient, the seasonal permeability constant coefficient for each slope height was obtained.

[0010] The seasonal permeability constant coefficient of each slope height is corrected by using the pressure effect of the high slope height on the moisture content of the low slope height under constant sliding height to obtain the comprehensive permeability influence degree of each slope height.

[0011] The comprehensive impact degree of permeability is used to construct a highway permeability BIM simulation test model, and the permeability coefficient of each slope height of the slope road surface is obtained. The permeability coefficient of each slope height is used to conduct a permeability simulation test of the municipal highway.

[0012] Preferably, the specific steps of obtaining the seasonal environmental impact coefficient include:

[0013] Analyze the consistency between the change of moisture content and temperature at the same slope height to obtain the degree of temperature permeability enhancement at each slope height;

[0014] Analyze the effect of capillary phenomena caused by humidity on the moisture content of slope pavement at different slope heights, and obtain the degree of moisture permeability enhancement at each slope height;

[0015] The first The product of the moisture permeability enhancement degree and the temperature permeability enhancement degree of the slope height is recorded as Seasonal environmental impact coefficient of slope height.

[0016] Preferably, the specific steps of obtaining the degree of temperature permeability enhancement include:

[0017] No. The moisture content of all days at the slope height constitutes the Time series of moisture content at slope height; The temperature of all days at the slope height constitutes the Temperature time series of ramp height;

[0018] The first The absolute value of the normalized Pearson correlation coefficient of the slope height temperature time series and the moisture content time series is recorded as Temperature permeability enhancement with slope height.

[0019] Preferably, the specific steps of obtaining the degree of moisture permeability enhancement include:

[0020] The first The time series of moisture content at slope height is consistent with the The time series of moisture content of slope height is composed of the sum of moisture content of the same sequence number, which is recorded as Time series of ambient moisture content at slope height;

[0021] The first The moisture content of each sequence number in the time series of the environmental moisture content at the slope height is The sum of the ratios of the moisture contents of the corresponding numbers in the time series of the moisture contents of the slope height is recorded as Ambient moisture impact coefficient of slope height;

[0022] No. The humidity of all days at the slope height constitutes the Humidity time series of slope height;

[0023] The first The absolute value of the normalized Pearson correlation coefficient of the humidity time series and the moisture content time series of the slope height is The product of the environmental moisture impact coefficient of the slope height is recorded as Moisture permeability enhancement with slope height.

[0024] Preferably, the specific steps of obtaining the sliding water content matching pair include:

[0025] The first The moisture content of all slope heights on the day was arranged in descending order of slope height to obtain the Daily moisture content series;

[0026] Get the The matching content corresponding to each moisture content in the moisture content sequence of the day;

[0027] The first Each moisture content in the moisture content sequence of the day and the corresponding matching content constitute the first The moisture content on that day matches the water content of the slope height.

[0028] Preferably, the specific steps of obtaining the matching content include:

[0029] Get the first The sequence of water content of adjacent days;

[0030] Use dynamic time planning algorithm to The moisture content sequence of the day and the moisture content sequence of the adjacent day are matched. Each moisture content in the moisture content sequence of the day is There are corresponding matching contents in the moisture content sequence of the adjacent days of the day.

[0031] Preferably, the specific steps of obtaining the constant sliding height include:

[0032] The first The absolute value of the difference in water content between the sliding water content matches at each slope height on the day is recorded as Constant difference in water content at each slope height on the day;

[0033] Preset constant threshold value, The water content constant difference of all slope heights on the day was normalized using the maximum and minimum normalization algorithm to obtain the constant normalized difference in water content at each slope height on the day;

[0034] The highest slope height among the slope heights whose water content constant normalized difference is less than or equal to the constant threshold is recorded as the The constant sliding height of the day.

[0035] Preferably, the specific steps of obtaining the seasonal water permeability constant coefficient include:

[0036] The first The seasonal environmental impact coefficient of slope height is expressed as ;

[0037] No. Seasonal permeability constant coefficient of slope height The calculation method is:

[0038]

[0039] in, is the total number of days for collecting moisture content; For the the number of seasonal effects of slope height;

[0040] is the absolute value function; Represents an exponential function with a natural constant as its base.

[0041] Preferably, the specific steps of obtaining the number of seasonal impacts include:

[0042] The first The number of times the slope height is below the constant sliding height in the total number of days is recorded as the Number of seasonal effects on slope height.

[0043] Preferably, the specific steps of obtaining the comprehensive impact degree of water permeability include:

[0044] No. Comprehensive impact of slope height on water permeability The calculation method is:

[0045]

[0046] in, For the Seasonal permeability constant coefficient of slope height, is the total number of days for collecting moisture content, For the Slope height; For the The constant sliding height of the day, is the maximum height of the slope height; is the maximum value function.

[0047] The beneficial effects of the technical solution of the present invention are as follows: the present invention obtains the moisture content of different slope heights on a daily basis; analyzes the influence of capillary phenomena on the moisture content in the slope pavement under different temperatures and humidity to obtain the seasonal environmental impact coefficient of each slope height; quantifies the water permeability of each slope height under temperature and humidity affected by the season to obtain the sensitivity of each slope height to the seasonal environment; matches the moisture content of all slope heights on adjacent days to obtain a sliding water content matching pair for each slope height every day; utilizes the approximate relationship of the moisture content in the sliding water content matching pair to reflect the characteristics of the moisture content in the same season, and screens sliding water content matching pairs with similar moisture contents to obtain a constant sliding height every day; obtains different slope heights that can be stable in each season by quantifying the moisture content distribution of each slope height when affected by the season; analyzes the moisture content of the same slope height on a seasonal basis to obtain a stable sliding height for each season. The relative position relationship between the slope height and the constant landslide height on all days is combined with the seasonal environmental impact coefficient to obtain the seasonal permeability constant coefficient of each slope height; by analyzing the position of different slope heights and the constant landslide height on all days, the degree of influence of each slope height by different seasons is quantified; the seasonal permeability constant coefficient of each slope height is corrected by using the pressure influence of the high slope height on the moisture content of the low slope height under the constant landslide height to obtain the comprehensive permeability influence of each slope height; the comprehensive permeability influence is obtained by the pressure influence of the moisture above the height of each slope height on the moisture at the low height on different days, and then the comprehensive permeability influence is used to simulate the permeability, taking the seasonal influence as one of the prior influencing factors to evaluate the permeability of municipal roads and eliminate the interference of seasonal influence factors on permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 work.

[0049] Figure 1 This is a flowchart of the steps of the BIM-based municipal highway permeability simulation test method of the present invention. DETAILED DESCRIPTION

[0050] To further illustrate the technical means and effectiveness of the present invention to achieve its intended objectives, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the BIM-based municipal highway permeability simulation testing method proposed by the present invention, including its specific implementation, structure, features, and effectiveness. In the following description, references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0051] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0052] The specific scheme of the BIM-based municipal highway permeability simulation test method provided by the present invention is described in detail below with reference to the accompanying drawings.

[0053] See also Figure 1 , which shows a flowchart of a BIM-based municipal highway permeability simulation test method provided by one embodiment of the present invention, the method comprising the following steps:

[0054] Step S001: construct a permeability model of the slope road surface using prior temperature and humidity to obtain the moisture content at different slope heights every day.

[0055] It should be noted that the purpose of this embodiment is to simulate the permeability of the slope road surface, and then use different temperatures, humidity and altitudes to analyze the effects of seasons and different seasons and altitudes on the permeability at different heights of the slope road surface, obtain seasonal and high-level permeability weights, and use the seasonal and high-level permeability weights as the permeability coefficient weights of each slope height when constructing the BIM highway permeability simulation test model, so that the simulation results are more accurate. Therefore, it is necessary to first construct a permeability model of the slope road surface and obtain the moisture content of different slope heights every day.

[0056] Specifically, the Revit platform was used to construct a permeable model of a sloped pavement, where the horizontal length of the sloped pavement was 100 meters, the pavement height was 10 meters, and the pavement slope was 10 degrees. The surface of the sloped pavement was simulated by paving porous asphalt mixture, and the pore size of the asphalt mixture was consistent and the thickness was 30 mm.

[0057] Furthermore, the prior surface temperature and humidity of the local meteorological database for a one-year simulation period were selected and input into the permeability model of the slope road surface. Then, sampling points for moisture content were set at the road surface height with a fixed collection interval. The moisture content obtained at each sampling point every day during the one-year simulation period was recorded as the moisture content at each slope height on each day.

[0058] It should be noted that the Revit platform is an existing BIM platform, in which the parameters of the sloped pavement are set with reference to existing design specifications. This embodiment does not specifically limit the parameters in the permeable model of the above-mentioned sloped pavement. Other embodiments may adjust the parameters in the permeable model of the sloped pavement with reference to actual needs.

[0059] Step S002: Analyze the influence of capillary phenomena on the moisture content in the slope road surface under different temperatures and humidity to obtain the seasonal environmental impact coefficient of each slope height.

[0060] It should be noted that the temperature and humidity on municipal roads change regularly and continuously with the seasons. Since the order of seasonal changes is fixed every year, different temperatures and humidity will cause the porous asphalt mixtures in the road surface to contain different amounts of moisture, and the moisture will form different degrees of adhesion. Therefore, for the local highway pavement permeability simulation test, this embodiment analyzes the consistency between the moisture content change and the temperature at the same slope height to obtain the temperature permeability enhancement degree at each slope height, so as to reflect the impact of temperature changes on the moisture content at each slope height.

[0061] Preferably, the specific steps of analyzing the consistency between the change in moisture content and temperature at the same slope height and obtaining the degree of water permeability enhancement at each slope height are:

[0062] For the Slope height, The moisture content of all days at the slope height constitutes the Time series of moisture content at slope height; The temperature of all days at the slope height constitutes the Temperature time series of ramp height;

[0063] The first The absolute value of the normalized Pearson correlation coefficient of the slope height temperature time series and the moisture content time series is recorded as Temperature permeability enhancement with slope height.

[0064] It should be noted that capillary action refers to the phenomenon in which liquid overcomes gravity and rises in small pipes or pores due to differences in surface tension and adhesion. On municipal highway pavements, this is mainly manifested as liquid in the lower layer of the pavement flowing back to the pavement surface through the pores in the porous asphalt mixture, and even forming water accumulation. Increased humidity will shorten the path of capillary action, accelerate water replenishment, and thus increase the moisture content of the sloping pavement. If the moisture content of the adjacent slope heights of the sloping pavement at a certain slope height is higher, the greater the air humidity, the more likely the sloping pavement at that slope height is to produce capillary action through the pores in the porous asphalt mixture, that is, the better the liquid connectivity in the porous asphalt mixture, the more the permeability of the sloping pavement at that slope height is hindered by capillary action. Therefore, this embodiment analyzes the effect of the capillary action caused by humidity on the moisture content of the sloping pavement at different slope heights to obtain the degree of moisture permeability enhancement at each slope height, thereby reflecting the influence of humidity at that height.

[0065] Preferably, the specific steps of analyzing the effect of the capillary phenomenon caused by humidity on the moisture content of the slope road surface at different slope heights and obtaining the degree of moisture permeability enhancement at each slope height are as follows:

[0066] The first The time series of moisture content at slope height is consistent with the The time series of moisture content of slope height is composed of the sum of moisture content of the same sequence number, which is recorded as The time series of the ambient moisture content at the slope height; it should be noted that if Slope height only exists in Slope height or Slope height, then only the existing slope height is used to calculate the Time series of ambient moisture content at slope height.

[0067] Further, the The moisture content of each sequence number in the time series of the environmental moisture content at the slope height is The sum of the ratios of the moisture contents of the corresponding numbers in the time series of the moisture contents of the slope height is recorded as Ambient moisture impact coefficient of slope height;

[0068] No. The humidity of all days at the slope height constitutes the Humidity time series of slope height;

[0069] The first The absolute value of the normalized Pearson correlation coefficient of the humidity time series and the moisture content time series of the slope height is The product of the environmental moisture impact coefficient of the slope height is recorded as Moisture permeability enhancement with slope height.

[0070] Preferably, the specific steps for obtaining the seasonal environmental impact coefficient of each slope height according to the temperature water permeability enhancement degree and the humidity water permeability enhancement degree of each slope height are:

[0071] For the Slope height, the The product of the moisture permeability enhancement degree and the temperature permeability enhancement degree of the slope height is recorded as Seasonal environmental impact coefficient of slope height.

[0072] Step S003: Match the moisture content of all slope heights on adjacent days to obtain a matching pair of falling water content for each slope height each day; use the approximate relationship between the moisture content in the falling water content matching pairs to reflect the characteristics of the moisture content in the same season, and select falling water content matching pairs with similar moisture content to obtain a constant falling height for each day; analyze the relative position relationship between the same slope height and the constant falling height on all days, and combine it with the seasonal environmental impact coefficient to obtain the seasonal permeability constant coefficient for each slope height.

[0073] It should be noted that due to the height difference on the slope road surface, the porous asphalt mixture at the high slope height will squeeze the porous asphalt mixture at the low slope height, resulting in a relatively smaller gap between the porous asphalt mixtures of the road surface with lower slope height, thereby causing the water infiltration of the road surface with low slope height to be weakened as a whole. In the same season, the temperature and humidity environment are similar, and the changes in temperature and humidity are more stable than those in other seasons. However, the temperature and humidity have different effects on water infiltration at different slope heights in different seasons.

[0074] Therefore, this embodiment reflects the same season by the conditions of adjacent days, and then analyzes the difference in moisture content of adjacent days to obtain a stable constant sliding height for each day in the same season. The constant sliding height is used to represent the stable height of moisture content in the season corresponding to that day; the seasonal permeability constant coefficient of each slope height is obtained through the constant sliding height and the seasonal environmental impact coefficient of each slope height below it, which is used to represent the seasonal permeability constant coefficient of each slope height in different seasons.

[0075] Preferably, the specific steps of matching the moisture content of all slope heights on adjacent days and obtaining the matching pairs of water content at each slope height on each day are:

[0076] For the Day, will The moisture content of all slope heights on the day was arranged in descending order of slope height to obtain the The moisture content sequence of the day; similarly, the The sequence of water content of adjacent days;

[0077] It should be noted that this embodiment is based on the The day after the day is the first The adjacent day of the day is used to indicate the When a day and its adjacent day are in the same season, other embodiments may select the previous day as the adjacent day. This embodiment does not specifically limit the adjacent day.

[0078] Use dynamic time planning algorithm to The moisture content sequence of the day and the moisture content sequence of the adjacent day are matched. Each moisture content in the moisture content sequence of the day is There is a corresponding matching content in the moisture content sequence of the adjacent days of the day. Each moisture content in the moisture content sequence of the day and the corresponding matching content constitute the first The moisture content of the day corresponds to the sliding water content of the slope height; the dynamic time planning algorithm is an existing well-known technology and will not be described in detail in this embodiment.

[0079] It should be noted that the difference in moisture content in adjacent days in the same season is small. Therefore, after obtaining the matching pairs of sliding water content at each slope height, the larger difference indicates that the moisture content in that season is easily affected by the season, resulting in an unstable slope height, and the smaller difference indicates that the moisture content in that season can still maintain a stable slope height even if it is affected by the season. Then, based on the performance of the stable slope height in different seasons, the seasonal permeability constant coefficient of each slope height is obtained.

[0080] Preferably, the approximate relationship of moisture content in the sliding water content matching pairs is used to reflect the characteristics of moisture content in the same season, and the specific steps of screening sliding water content matching pairs with similar moisture content to obtain the constant sliding height every day are:

[0081] The first The absolute value of the difference in water content between the sliding water content matches at each slope height on the day is recorded as Constant difference in water content at each slope height on the day;

[0082] A constant threshold is preset. In this embodiment, the constant threshold is described by taking 0.3 as an example. The water content constant difference of all slope heights on the day was normalized using the maximum and minimum normalization algorithm to obtain the The water content of each slope height is constant normalized difference on the day; the highest slope height among the slope heights with the water content constant normalized difference less than or equal to the constant threshold is recorded as the The constant sliding height of the day.

[0083] It should be noted that the constant sliding height is used to represent the stable height of the surface moisture content in the season corresponding to that day. Slope heights higher than the constant sliding height are unstable and therefore need to be screened out to avoid interference when analyzing the impact of seasons on pavement permeability.

[0084] Preferably, the specific steps of analyzing the relative position relationship between the same slope height and the constant sliding height on all days and combining the seasonal environmental impact coefficient to obtain the seasonal permeability constant coefficient of each slope height are as follows:

[0085] The first The seasonal environmental impact coefficient of slope height is expressed as ;

[0086] No. Seasonal permeability constant coefficient of slope height The calculation method is:

[0087]

[0088] in, is the total number of days for collecting moisture content; For the The seasonal impact times of slope height; the specific method of obtaining the seasonal impact times is: The number of times the slope height is below the constant sliding height in the total number of days is recorded as the the number of seasonal effects of slope height; is the absolute value function; Represents an exponential function with a natural constant as its base.

[0089] Indicates the The proportion of slope height in stable and unstable state caused by seasonal changes during the total time of collecting moisture content is When it is closer to 1 or 0, it indicates that Slope height On the slope road surface, no matter what season, the water permeability will not change due to the temperature and humidity changes caused by the season. The closer the value is to 0, the The permeability of the slope height is less susceptible to seasonal influences; on the contrary, it tends to be When the surface The permeability of slope height is more easily affected by seasons.

[0090] Step S004: Using the pressure effect of the high slope height on the moisture content of the low slope height at a constant sliding height, the seasonal permeability constant coefficient of each slope height is corrected to obtain the comprehensive permeability influence degree of each slope height; using the comprehensive permeability influence degree to construct a highway permeability BIM simulation test model, obtain the permeability coefficient of each slope height of the slope pavement, and use the permeability coefficient of each slope height to conduct a permeability simulation test of the municipal highway.

[0091] It should be noted that the moisture content at different slope heights is not only affected by the seasonal effects of humidity and temperature, but also by the fact that moisture at high slope heights slides through the pores inside the road to low slope heights. There will be a height difference in the pores, that is, the moisture at high slope heights will exert pressure on the moisture at low slope heights, resulting in higher moisture content and more severe capillary phenomena at low slope heights. Therefore, this embodiment corrects the seasonal permeability constant coefficient of each slope height by analyzing the position of the slope height relative to the constant sliding height of each day, and obtains the comprehensive permeability impact degree of each slope height.

[0092] Preferably, the seasonal permeability constant coefficient of each slope height is corrected by using the pressure influence of the high slope height on the moisture content of the low slope height under a constant sliding height to obtain the comprehensive permeability influence degree of each slope height in the following specific steps:

[0093] No. Comprehensive impact of slope height on water permeability The calculation method is:

[0094]

[0095] in, For the Seasonal permeability constant coefficient of slope height, is the total number of days for collecting moisture content, For the Slope height; For the The constant sliding height of the day, is the maximum height of the slope height; is the maximum value function, used to make the Slope height and The value of the constant sliding height of the day is greater than or equal to 0.

[0096] For the Slope height and The relative position of the constant sliding height of the day. When the value is greater than or equal to 0, it means that the The slope height is below the constant sliding height and is more susceptible to the The water pressure at other heights above the slope height is affected, and the greater the distance from the constant sliding height, the greater the pressure impact, so the correction effect on the seasonal permeability constant coefficient is stronger.

[0097] Furthermore, the comprehensive permeability impact degree was used to construct a highway permeability BIM simulation test model to obtain the permeability coefficient of each slope height of the slope road surface. The specific steps for conducting a permeability simulation test of the municipal highway using the permeability coefficient of each slope height are as follows:

[0098] 1. Design CAD drawings of municipal roads using their 3D geological models;

[0099] 2. Import the CAD drawings of the municipal highway into the BIM software, and input the preset component data of the municipal highway. The BIM software system will generate a BIM simulation test model of the highway permeability;

[0100] 3. The comprehensive permeability impact is used as a weight parameter for each pavement height in the highway permeability BIM simulation test model. This weight is added to the model's calculation of viscous fluid permeability, automatically calculating the permeability coefficient of the slope pavement using porous crushed asphalt mixture at each slope height. The weighted permeability impact weakens the permeability.

[0101] 4. Input the permeability coefficient into the permeability performance evaluation module of the highway permeable BIM simulation test model for intelligent evaluation to complete the permeability simulation test of the municipal highway.

[0102] It should be noted that designing CAD drawings, constructing a highway permeable BIM simulation test model, and evaluating permeability performance are all existing well-known technologies and will not be described in detail in this embodiment.

[0103] It should be noted that the The model only shows negative correlation and the output of the constraint model is in In the interval, As the input of this model, it can be replaced by other models with the same purpose in specific implementation. This embodiment is just based on The model is used as an example for description without any specific limitation.

[0104] 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The BIM-based municipal highway permeability simulation test method is characterized by: The method comprises the following steps: A permeability model for sloped pavement is constructed using prior temperature and humidity to obtain the moisture content at different slope heights on each day. The prior temperature and humidity vary from day to day. Analyze the effect of capillary phenomena on moisture content in slope pavement at different temperatures and humidities, and obtain seasonal environmental impact coefficients for each slope height; The moisture content of all slope heights on adjacent days was matched to obtain matching pairs of falling water content for each slope height each day. The approximate relationship between the moisture content in the falling water content matching pairs was used to reflect the characteristics of moisture content in the same season. Falling water content matching pairs with similar moisture content were selected to obtain the constant falling height for each day. The relative position relationship between the same slope height and the constant falling height on all days was analyzed, and combined with the seasonal environmental impact coefficient, the seasonal permeability constant coefficient for each slope height was obtained. The seasonal permeability constant coefficient of each slope height is corrected by using the pressure effect of the high slope height on the moisture content of the low slope height under constant sliding height to obtain the comprehensive permeability influence degree of each slope height. The comprehensive impact degree of permeability is used to construct a highway permeability BIM simulation test model, and the permeability coefficient of each slope height of the slope road surface is obtained. The permeability coefficient of each slope height is used to conduct a permeability simulation test of the municipal highway.

2. The BIM-based municipal highway water permeability simulation test method according to claim 1 is characterized in that: The specific steps for obtaining the seasonal environmental impact coefficient include: Analyze the consistency between the change of moisture content and temperature at the same slope height to obtain the degree of temperature permeability enhancement at each slope height; Analyze the effect of capillary phenomena caused by humidity on the moisture content of slope pavement at different slope heights, and obtain the degree of moisture permeability enhancement at each slope height; The first The product of the moisture permeability enhancement degree and the temperature permeability enhancement degree of the slope height is recorded as Seasonal environmental impact coefficient of slope height.

3. The BIM-based municipal highway water permeability simulation test method according to claim 2 is characterized in that: The specific steps of obtaining the temperature permeability enhancement degree include: No. The moisture content of all days at the slope height constitutes the Time series of moisture content at slope height; The temperature of all days at the slope height constitutes the Temperature time series of ramp height; The first The absolute value of the normalized Pearson correlation coefficient of the slope height temperature time series and the moisture content time series is recorded as Temperature permeability enhancement with slope height.

4. The BIM-based municipal highway water permeability simulation test method according to claim 3 is characterized in that: The specific steps of obtaining the degree of moisture permeability enhancement include: The first The time series of moisture content at slope height is consistent with the The time series of moisture content of slope height is composed of the sum of moisture content of the same sequence number, which is recorded as Time series of ambient moisture content at slope height; The first The moisture content of each sequence number in the time series of the environmental moisture content at the slope height is The sum of the ratios of the moisture contents of the corresponding numbers in the time series of the moisture contents of the slope height is recorded as Ambient moisture impact coefficient of slope height; No. The humidity of all days at the slope height constitutes the Humidity time series of slope height; The first The absolute value of the normalized Pearson correlation coefficient of the humidity time series and the moisture content time series of the slope height is The product of the environmental moisture impact coefficient of the slope height is recorded as Moisture permeability enhancement with slope height.

5. The BIM-based municipal highway water permeability simulation test method according to claim 1 is characterized in that: The specific steps of obtaining the sliding water content matching pair include: The first The moisture content of all slope heights on the day was arranged in descending order of slope height to obtain the Daily moisture content series; Get the The matching content corresponding to each moisture content in the moisture content sequence of the day; The first Each moisture content in the moisture content sequence of the day and the corresponding matching content constitute the first The moisture content on that day matches the water content of the slope height.

6. The BIM-based municipal highway water permeability simulation test method according to claim 5 is characterized in that: The specific steps of obtaining the matching content include: Get the first The sequence of water content of adjacent days; Use dynamic time planning algorithm to The moisture content sequence of the day and the moisture content sequence of the adjacent day are matched. Each moisture content in the moisture content sequence of the day is There are corresponding matching contents in the moisture content sequence of the adjacent days of the day.

7. The BIM-based municipal highway water permeability simulation test method according to claim 6 is characterized in that: The specific steps of obtaining the constant sliding height include: The first The absolute value of the difference in water content between the sliding water content matches at each slope height on the day is recorded as Constant difference in water content at each slope height on the day; Preset constant threshold value, The water content constant difference of all slope heights on the day was normalized using the maximum and minimum normalization algorithm to obtain the constant normalized difference in water content at each slope height on the day; The highest slope height among the slope heights whose water content constant normalized difference is less than or equal to the constant threshold is recorded as the The constant sliding height of the day.

8. The BIM-based municipal highway water permeability simulation test method according to claim 1 is characterized in that: The specific steps of obtaining the seasonal water permeability constant coefficient include: The first The seasonal environmental impact coefficient of slope height is expressed as ; No. Seasonal permeability constant coefficient of slope height The calculation method is: in, is the total number of days for collecting moisture content; For the the number of seasonal effects of slope height; is the absolute value function; Represents an exponential function with a natural constant as its base.

9. The BIM-based municipal highway water permeability simulation test method according to claim 8 is characterized in that: The specific steps for obtaining the seasonal impact times include: The first The number of times the slope height is below the constant sliding height in the total number of days is recorded as the Number of seasonal effects on slope height.

10. The BIM-based municipal highway water permeability simulation test method according to claim 1, characterized in that: The specific steps for obtaining the comprehensive impact degree of water permeability include: No. Comprehensive impact of slope height on water permeability The calculation method is: in, For the Seasonal permeability constant coefficient of slope height, is the total number of days for collecting moisture content, For the Slope height; For the The constant sliding height of the day, is the maximum height of the slope height; is the maximum value function.

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