CN113481784A - Temperature correction method for 0-20 ℃ deflection value of inorganic binder stabilized base layer - Google Patents
Temperature correction method for 0-20 ℃ deflection value of inorganic binder stabilized base layer Download PDFInfo
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Abstract
The application discloses a temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer, which comprises the following steps: collecting a dynamic deflection value; presetting a preliminary derivation formula; calling a test procedure calculation formula to obtain a standard value of the temperature correction coefficient in the structural layers with different depths of the granular base layer at 0-20 ℃; building data, substituting the data into a calculation model, giving different formula constants for x, y and z, and calculating an estimated value of a temperature correction coefficient; comparing and analyzing the standard value and the corresponding presumed value to obtain a difference value and a correlation coefficient; presetting a threshold value, comparing and analyzing to determine a formula constant and verifying the accuracy of the formula constant; after the verification is finished, obtaining a unified calculation formula of the temperature correction coefficient, and calculating the temperature correction coefficient; and calculating the corrected deflection value by combining the dynamic deflection value and the temperature correction coefficient. Compared with the prior art, the technical scheme provided by the invention can improve the calculation efficiency of deflection value temperature correction calculation.
Description
Technical Field
The application relates to the technical field of pavement deflection temperature correction coefficient calculation, in particular to a temperature correction method for a 0-20 ℃ deflection value of an inorganic binder stable base layer.
Background
The temperature is an important parameter for representing the service behavior of the pavement structure. In general, the temperature indicators used to evaluate the service life of a road pavement are: the temperature of the pavement structure layer, the surface temperature of the asphalt pavement, the atmospheric temperature and the like. Service performance indexes such as deflection, stress-strain response, rutting, skid resistance, road surface/tire noise and the like of the road surface are closely related to the temperature state of the road surface structure.
The deflection value is an important index for designing and detecting highway pavement engineering, the calculation of the deflection value relates to actually measured or estimated temperature of points in a granular material layer during measurement, the correction calculation of a field deflection detection value and the evaluation calculation of items such as deflection detection and the like, and the participation of a deflection temperature correction coefficient is avoided. At present, a calculation method of a deflection value and a temperature correction method thereof are determined in the existing JTG3450-2019 which is a highway subgrade and pavement site test regulation. However, when the inorganic binder stable semi-rigid base layer is at 0 ℃ to 20 ℃, the deflection value temperature correction calculation in the structural layers at different depths is calculated by combining the measured deflection value on site and the temperature correction coefficient, and the calculation of the temperature correction coefficient needs to replace different calculation methods according to the thicknesses of different structural layers, so that the error rate of the deflection value temperature correction calculation is increased, and the efficiency of the deflection value temperature correction calculation is seriously influenced.
Therefore, it is a technical problem to be solved by those skilled in the art how to provide a temperature correction method for a 0-20 ℃ deflection value of an inorganic binder stabilized base layer, which can improve the calculation efficiency of the deflection value temperature correction calculation when the average temperature of the inorganic binder stabilized semi-rigid base layer is 0-20 ℃.
Disclosure of Invention
In order to solve the technical problems, the application provides a temperature correction method for the deflection value of the inorganic binder stable base layer at 0-20 ℃, which can improve the calculation efficiency of the deflection value temperature correction calculation when the average temperature of the inorganic binder stable semi-rigid base layer is 0-20 ℃.
The first technical scheme provided by the application is as follows:
the application provides a temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer, which comprises the following steps: s1: collecting the thickness H and the average temperature T of the inorganic binder stable semi-rigid base layer during deflection measurement, and determining that the numerical range of the average temperature T is between 0 and 20 ℃; s2: obtaining the dynamic deflection value l of the inorganic binder stable base layer according to the thickness and the average temperature of the base layerT(ii) a S3: acquiring a temperature correction coefficient: preliminary derivation formula K 'for calculating preset temperature correction coefficient'3(x,y,z)(ii) a S4: calling a test procedure temperature correction coefficient calculation formula to obtain a standard value, referred to as a standard value, of the temperature correction coefficient in different depth structure layers of the inorganic binder stable semi-rigid base layer at 0-20 ℃; s5: constructing a data substitution calculation model based on a preliminary derivation formula; substituting the data into a calculation model to give different formula constants for x, y and z, and calculating to obtain estimated values of temperature correction coefficients in different depth structural layers of the stable semi-rigid base layer at 0-20 ℃ according to a preliminary derivation formula, which are referred to as estimated values for short; s6: substituting the input data of the standard value into the calculation model, performing difference value comparison analysis and correlation comparison analysis on the input data of the standard value and the corresponding presumed value, and obtaining a comparison difference value and a correlation coefficient; s7: presetting a difference threshold and a correlation coefficient threshold, and inputting the difference threshold and the correlation coefficient threshold into data to be substituted into a calculation model to perform comparative analysis with the comparison difference and the correlation coefficient; s8: determining specific values of formula constants x, y and z based on whether the result of the contrastive analysis meets the threshold requirement, and substituting the specific values into a preliminary derivation formula to obtain a preliminary calculation formula of the temperature correction coefficient value; s9: calculating to obtain verification values of temperature correction coefficients in different depth structural layers by using a primary calculation formula, and the verification values are shortened; carrying out correlation verification analysis on the verification value and the corresponding standard value to determine the accuracy of the x, y and z formula constants; s10: after the verification of the x, y and z formula constants is finished, substituting the formula constants with accurate verification to obtain a unified calculation formula K for the temperature correction coefficient values in the inorganic binder stable semi-rigid base layer structure layers with different depths at the temperature of 0-20 DEG C3(H,T)Based on the unified calculation formula K3(H,T)Obtaining a deflection temperature correction coefficient value K3(ii) a S11: and calculating the deflection value after temperature correction by combining the dynamic deflection value and the temperature correction coefficient.
Further, in a preferred mode of the present invention, the preliminary derivation formula of the deflection temperature correction coefficient calculation is:
K′3(x,y,z)＝e{x(Iny-1)H+z}(20-T)
in the formula: t-average temperature of the semi-rigid base layer stabilized by the inorganic binder during deflection measurement; h, stabilizing the thickness of the semi-rigid base layer by the inorganic binder; x, y, z-constant of formula to be measured.
Further, in a preferred mode of the present invention, the difference threshold is 0.10, and the correlation coefficient threshold is 0.99.
Further, in a preferred mode of the present invention, in S6, the comparison rule whether the comparison result satisfies the threshold requirement includes:
if the contrast difference between the presumed value and the standard value is less than or equal to 0.10 and the correlation coefficient is greater than 0.99, determining that the specific value of the given x, y, z formula constant at the moment meets the requirement of a threshold;
otherwise, determining that the specific value of the constant of the given x, y and z formula does not meet the requirement of the threshold value.
Further, in a preferred embodiment of the present invention, the S6 includes: s601: if the comparison difference value and the correlation coefficient meet the threshold requirement, selecting a specific value of a constant of a given x, y and z formula at the moment and entering the next step; s602: if the comparison difference or the correlation coefficient does not meet the threshold requirement, returning to the step S3 to give x, y and z different formula constants again, and repeating the steps from the step S3 to the step S6.
Further, in a preferred mode of the present invention, the correlation verification analysis includes: when the average temperature in the inorganic binder stable semi-rigid base layer is between 0 and 20 ℃, a comparison analysis chart and a correlation analysis chart of verification values and standard values in structural layers with different depths are constructed, correlation verification coefficients of the verification values and the standard values in the structural layers with different depths are obtained through analysis based on the correlation analysis chart, the correlation verification coefficients are compared with the correlation coefficient threshold values, and verification results are obtained.
Further, in a preferred mode of the present invention, the comparison rule between the correlation verification coefficient and the correlation coefficient threshold is:
if the correlation verification coefficients in the different depth structural layers are all larger than the correlation coefficient threshold, judging that the specific values of the given x, y and z formula constants are accurate;
and if the correlation verification coefficient in the structural layers with different depths is smaller than the correlation coefficient threshold, judging that the specific value of the given x, y and z formula constant is inaccurate.
Further, in a preferred embodiment of the present invention, the S8 includes: s801: if the specific value of the given x, y and z formula constant is judged to be accurate, the specific value of the given x, y and z formula constant at the moment is selected and the next step is carried out; s802: if the specific values of the given x, y and z formula constants are not accurate, returning to the step S3 to give different formula constants to x, y and z again, and repeating the steps from the step S3 to the step S7.
Further, in a preferred embodiment of the present invention, the formula constants x, y, z are specifically: x is 2.5X 10-5,y＝6,z＝4×10-3。
Further, in a preferred embodiment of the present invention, the unified calculation formula K is used as a basis3(H,T)Obtaining the deflection temperature correction coefficient value comprises:
s901: obtaining the average temperature T and the thickness H of the structural layer in different depth structural layers during deflection measurement; wherein the numerical range of the average temperature is more than 0 ℃ and less than or equal to 20 ℃;
s902: substituting the average temperature T and the thickness H of the structural layer into the unified calculation formula K3(H,T)Calculating to obtain a deflection temperature correction coefficient value;
wherein the unified calculation formula
In the formula: t-average temperature of the semi-rigid base layer stabilized by the inorganic binder during deflection measurement;
h-inorganic binder stabilizes the thickness of the semi-rigid substrate.
Further, in a preferred embodiment of the present invention, the formula for calculating the deflection value temperature correction is:
l20＝lT×K3
in the formula: l20-corrected deflection values for pellet and asphalt stabilized base temperature;
lT-a dynamic deflection value; k3-a temperature correction factor.
Compared with the prior art, the temperature correction method for the 0-20 ℃ deflection value of the inorganic binder stabilized base layer provided by the invention comprises the following steps: s1: collecting the thickness H and the average temperature T of the inorganic binder stable semi-rigid base layer during deflection measurement, and determining that the numerical range of the average temperature T is between 0 and 20 ℃; s2: obtaining the dynamic deflection value l of the inorganic binder stable base layer according to the thickness and the average temperature of the base layerT(ii) a S3: acquiring a temperature correction coefficient: preliminary derivation formula K 'for calculating preset temperature correction coefficient'3(x,y,z)(ii) a S4: calling a test procedure temperature correction coefficient calculation formula to obtain a standard value, referred to as a standard value, of the temperature correction coefficient in different depth structure layers of the inorganic binder stable semi-rigid base layer at 0-20 ℃; s5: constructing a data substitution calculation model based on a preliminary derivation formula; substituting the data into a calculation model to give different formula constants for x, y and z, and calculating to obtain estimated values of temperature correction coefficients in different depth structural layers of the stable semi-rigid base layer at 0-20 ℃ according to a preliminary derivation formula, which are referred to as estimated values for short; s6: substituting the input data of the standard value into the calculation model, performing difference value comparison analysis and correlation comparison analysis on the input data of the standard value and the corresponding presumed value, and obtaining a comparison difference value and a correlation coefficient; s7: presetting a difference threshold and a correlation coefficient threshold, and inputting the difference threshold and the correlation coefficient threshold into a data substitution calculation model to be paired with a comparison difference and a correlation coefficientAnalyzing the ratio; s8: determining specific values of formula constants x, y and z based on whether the result of the contrastive analysis meets the threshold requirement, and substituting the specific values into a preliminary derivation formula to obtain a preliminary calculation formula of the temperature correction coefficient value; s9: calculating to obtain verification values of temperature correction coefficients in different depth structural layers by using a primary calculation formula, and the verification values are shortened; carrying out correlation verification analysis on the verification value and the corresponding standard value to determine the accuracy of the x, y and z formula constants; s10: after the verification of the x, y and z formula constants is finished, substituting the formula constants with accurate verification to obtain a unified calculation formula K for the temperature correction coefficient values in the inorganic binder stable semi-rigid base layer structure layers with different depths at the temperature of 0-20 DEG C3(H,T)Based on the unified calculation formula K3(H,T)Obtaining a deflection temperature correction coefficient value K3(ii) a S11: and calculating the deflection value after temperature correction by combining the dynamic deflection value and the temperature correction coefficient. When the deflection is measured, if the average temperature T of the stable semi-rigid base course of the inorganic binder is in the range of 0-20 ℃, the calculation method can be used for replacing the deflection value temperature correction calculation method in different depth structural layers in the existing road bed pavement site test regulation JTG3450-2019, so that the deflection temperature correction coefficients in the different depth structural layers can be calculated by using a unified calculation method, and the deflection value temperature correction calculation efficiency is improved. Compared with the prior art, the technical scheme of the invention can improve the calculation efficiency of the deflection value temperature correction calculation when the average temperature of the aggregate and the asphalt stabilized base layer is between 0 and 20 ℃.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer according to an embodiment of the present invention;
FIG. 2 is a flow diagram of the correlation verification analysis according to an embodiment of the present invention;
FIG. 3 is a block diagram of a process for formulating a pellet layer sag temperature correction factor according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first correlation analysis graph according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a first comparative analysis chart according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a second correlation analysis graph according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a second comparative analysis chart according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a third correlation analysis graph according to an embodiment of the present invention;
FIG. 9 is a schematic illustration of a third comparative analysis chart according to an embodiment of the present invention;
FIG. 10 is a diagram of a fourth correlation analysis graph according to an embodiment of the present invention;
FIG. 11 is a diagram of a fourth comparative analysis chart according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 to 11, the temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer provided by the present invention comprises the following steps: s1: collecting the thickness H and the average temperature T of the inorganic binder stable semi-rigid base layer during deflection measurement, and determining that the numerical range of the average temperature T is between 0 and 20 ℃; s2: obtaining the dynamic deflection value l of the inorganic binder stable base layer according to the thickness and the average temperature of the base layerT(ii) a S3: acquiring a temperature correction coefficient: preliminary derivation formula for calculating preset temperature correction coefficientK′3(x,y,z)(ii) a S4: calling a test procedure temperature correction coefficient calculation formula to obtain a standard value, referred to as a standard value, of the temperature correction coefficient in different depth structure layers of the inorganic binder stable semi-rigid base layer at 0-20 ℃; s5: constructing a data substitution calculation model based on a preliminary derivation formula; substituting the data into a calculation model to give different formula constants for x, y and z, and calculating to obtain estimated values of temperature correction coefficients in different depth structural layers of the stable semi-rigid base layer at 0-20 ℃ according to a preliminary derivation formula, which are referred to as estimated values for short; s6: substituting the input data of the standard value into the calculation model, performing difference value comparison analysis and correlation comparison analysis on the input data of the standard value and the corresponding presumed value, and obtaining a comparison difference value and a correlation coefficient; s7: presetting a difference threshold and a correlation coefficient threshold, and inputting the difference threshold and the correlation coefficient threshold into data to be substituted into a calculation model to perform comparative analysis with the comparison difference and the correlation coefficient; s8: determining specific values of formula constants x, y and z based on whether the result of the contrastive analysis meets the threshold requirement, and substituting the specific values into a preliminary derivation formula to obtain a preliminary calculation formula of the temperature correction coefficient value; s9: calculating to obtain verification values of temperature correction coefficients in different depth structural layers by using a primary calculation formula, and the verification values are shortened; carrying out correlation verification analysis on the verification value and the corresponding standard value to determine the accuracy of the x, y and z formula constants; s10: after the verification of the x, y and z formula constants is finished, substituting the formula constants with accurate verification to obtain a unified calculation formula K for the temperature correction coefficient values in the inorganic binder stable semi-rigid base layer structure layers with different depths at the temperature of 0-20 DEG C3(H,T)Based on the unified calculation formula K3(H,T)Obtaining a deflection temperature correction coefficient value K3(ii) a S11: and calculating the deflection value after temperature correction by combining the dynamic deflection value and the temperature correction coefficient.
The invention provides a temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer, which specifically comprises the following steps: s1: collecting the thickness H and the average temperature T of the inorganic binder stable semi-rigid base layer during deflection measurement, and determining that the numerical range of the average temperature T is between 0 and 20 ℃; s2: obtaining the dynamic deflection value l of the inorganic binder stable base layer according to the thickness and the average temperature of the base layerT(ii) a S3: obtaining temperature correctionPositive coefficient: preliminary derivation formula K 'for calculating preset temperature correction coefficient'3(x,y,z)(ii) a S4: calling a test procedure temperature correction coefficient calculation formula to obtain a standard value, referred to as a standard value, of the temperature correction coefficient in different depth structure layers of the inorganic binder stable semi-rigid base layer at 0-20 ℃; s5: constructing a data substitution calculation model based on a preliminary derivation formula; substituting the data into a calculation model to give different formula constants for x, y and z, and calculating to obtain estimated values of temperature correction coefficients in different depth structural layers of the stable semi-rigid base layer at 0-20 ℃ according to a preliminary derivation formula, which are referred to as estimated values for short; s6: substituting the input data of the standard value into the calculation model, performing difference value comparison analysis and correlation comparison analysis on the input data of the standard value and the corresponding presumed value, and obtaining a comparison difference value and a correlation coefficient; s7: presetting a difference threshold and a correlation coefficient threshold, and inputting the difference threshold and the correlation coefficient threshold into data to be substituted into a calculation model to perform comparative analysis with the comparison difference and the correlation coefficient; s8: determining specific values of formula constants x, y and z based on whether the result of the contrastive analysis meets the threshold requirement, and substituting the specific values into a preliminary derivation formula to obtain a preliminary calculation formula of the temperature correction coefficient value; s9: calculating to obtain verification values of temperature correction coefficients in different depth structural layers by using a primary calculation formula, and the verification values are shortened; carrying out correlation verification analysis on the verification value and the corresponding standard value to determine the accuracy of the x, y and z formula constants; s10: after the verification of the x, y and z formula constants is finished, substituting the formula constants with accurate verification to obtain a unified calculation formula K for the temperature correction coefficient values in the inorganic binder stable semi-rigid base layer structure layers with different depths at the temperature of 0-20 DEG C3(H,T)Based on the unified calculation formula K3(H,T)Obtaining a deflection temperature correction coefficient value K3(ii) a S11: and calculating the deflection value after temperature correction by combining the dynamic deflection value and the temperature correction coefficient. When the deflection is measured, if the average temperature T of the stable semi-rigid base course of the inorganic binder is in the range of 0-20 ℃, the calculation method can be used for replacing the deflection value temperature correction calculation method in different depth structural layers in the existing road bed pavement site test regulation JTG3450-2019, so that the deflection temperature correction coefficients in the different depth structural layers can be calculated by using a unified methodThe calculation method can improve the efficiency of temperature correction calculation of the deflection value. Compared with the prior art, the technical scheme of the invention can improve the calculation efficiency of the deflection value temperature correction calculation when the average temperature of the aggregate and the asphalt stabilized base layer is between 0 and 20 ℃.
Specifically, in the embodiment of the present invention, in step S4, the difference comparison analysis includes: s401: calling a plurality of groups of sample data; the sample data includes the presumed value and a standard value corresponding thereto; s402: calculating a comparison difference value of the two values and a maximum value and a minimum value of the comparison difference value by combining the estimated value and the standard value; s403: obtaining the average value of the comparison difference value according to the comparison difference value, and calculating the standard deviation and the variation coefficient of the sample data based on the average value; s404: the degree of dispersion between the presumed value and the standard value is determined based on the coefficient of variation, and the validity of the presumed value is preliminarily determined.
Specifically, in the embodiment of the present invention, the difference threshold is 0.10, and the correlation coefficient threshold is 0.99.
Specifically, in the embodiment of the present invention, in S6, the comparison rule whether the comparison result meets the threshold requirement includes:
if the contrast difference between the presumed value and the standard value is less than or equal to 0.10 and the correlation coefficient is greater than 0.99, determining that the specific value of the given x, y, z formula constant at the moment meets the requirement of a threshold;
otherwise, determining that the specific value of the constant of the given x, y and z formula does not meet the requirement of the threshold value.
Specifically, in the embodiment of the present invention, in S6, the method includes: s601: if the comparison difference value and the correlation coefficient meet the threshold requirement, selecting a specific value of a constant of a given x, y and z formula at the moment and entering the next step; s602: if the comparison difference or the correlation coefficient does not meet the threshold requirement, returning to the step S3 to give x, y and z different formula constants again, and repeating the steps from the step S3 to the step S6.
Specifically, in an embodiment of the present invention, the correlation verification analysis includes: when the average temperature in the inorganic binder stable semi-rigid base layer is between 0 and 20 ℃, a comparison analysis chart and a correlation analysis chart of verification values and standard values in structural layers with different depths are constructed, correlation verification coefficients of the verification values and the standard values in the structural layers with different depths are obtained through analysis based on the correlation analysis chart, the correlation verification coefficients are compared with the correlation coefficient threshold values, and verification results are obtained.
Specifically, in the embodiment of the present invention, the comparison rule between the correlation verification coefficient and the correlation coefficient threshold is:
if the correlation verification coefficients in the different depth structural layers are all larger than the correlation coefficient threshold, judging that the specific values of the given x, y and z formula constants are accurate;
and if the correlation verification coefficient in the structural layers with different depths is smaller than the correlation coefficient threshold, judging that the specific value of the given x, y and z formula constant is inaccurate.
Specifically, in the embodiment of the present invention, in S8, the method includes: s801: if the specific value of the given x, y and z formula constant is judged to be accurate, the specific value of the given x, y and z formula constant at the moment is selected and the next step is carried out; s802: if the specific values of the given x, y and z formula constants are not accurate, returning to the step S3 to give different formula constants to x, y and z again, and repeating the steps from the step S3 to the step S7.
Specifically, in the embodiment of the present invention, the formula constants x, y, z are specifically: x is 2.5X 10-5,y＝6,z＝4×10-3。
Specifically, in the embodiment of the present invention, in the S8, the correlation verification analysis includes: s803: constructing a first comparative analysis chart and a first correlation analysis chart of a verification value in an inorganic binder stable semi-rigid base layer and a standard value in a structural layer with the same thickness at 0-20 ℃ and H being more than 50mm and less than or equal to 100mm, establishing a first linear regression equation of the verification value and the standard value in the structural layer with the same thickness according to the first correlation analysis chart, obtaining a first correlation verification coefficient of the verification value and the standard value in the structural layer with the same thickness, and comparing the first correlation verification coefficient with a correlation coefficient threshold value to obtain a first verification result;
wherein the first linear regression equation is: y is1＝1.1659x1-0.1686；
In the formula: x is the number of1-a proof value in a stable semi-rigid base layer of inorganic binder of 50mm < H < 100 mm;
y1-a standard value for the stable semi-rigid substrate of inorganic binder of 50mm < H.ltoreq.100 mm;
the first correlation verification coefficient R1 2＝0.9998。
Specifically, in the embodiment of the present invention, in the S8, the correlation verification analysis further includes: s804: constructing a second comparative analysis chart and a second correlation analysis chart of a verification value in the inorganic binder stable semi-rigid base layer and a standard value in a structural layer with the same thickness at 0-20 ℃ and H being more than 100mm and less than or equal to 200mm, establishing a second linear regression equation of the verification value and the standard value in the structural layer with the same thickness according to the second correlation analysis chart, obtaining a second correlation verification coefficient of the verification value and the standard value in the structural layer with the same thickness, and comparing the second correlation verification coefficient with a correlation coefficient threshold value to obtain a second verification result;
wherein the second linear regression equation is: y is2＝1.041x2-0.0422；
In the formula: x is the number of2-a proof value in the semi-rigid base layer stabilized by inorganic binder with H being more than 100mm and less than or equal to 200 mm;
y2-a standard value for stabilizing the semi-rigid base layer with an inorganic binder of H & lt 100mm & gt and & lt 200 mm;
the second correlation verification coefficient R2 2＝0.9997。
Specifically, in the embodiment of the present invention, in the S8, the correlation verification analysis further includes: s805: constructing a third comparative analysis chart and a third correlation analysis chart of the verification value in the inorganic binder stable semi-rigid base layer and the standard value in the structural layer with the same thickness at 0-20 ℃ and H being more than 200mm and less than or equal to 300mm, establishing a third linear regression equation of the verification value and the standard value in the structural layer with the same thickness according to the third correlation analysis chart, obtaining a third correlation verification coefficient of the verification value and the standard value in the structural layer with the same thickness, and comparing the third correlation verification coefficient with a correlation coefficient threshold value to obtain a third verification result;
wherein the third linear regression equation is: y is3＝1.0267x3-0.0298；
In the formula: x is the number of3-a proof value in the semi-rigid base layer stabilized by inorganic binder of 200mm < H < 300 mm;
y3-a standard value for the stable semi-rigid substrate of inorganic binder of 200mm < H.ltoreq.300 mm;
the third correlation verification coefficient R3 2＝0.9995。
Specifically, in the embodiment of the present invention, in the S8, the correlation verification analysis further includes: s806: establishing a fourth comparative analysis chart and a fourth correlation analysis chart of a verification value in the inorganic binder stable semi-rigid base layer with H being more than or equal to 300mm at 0-20 ℃ and a standard value in a structural layer with the same thickness, establishing a fourth linear regression equation of the verification value and the standard value in the structural layer with the thickness according to the fourth correlation analysis chart, obtaining a fourth correlation verification coefficient of the verification value and the standard value in the structural layer with the thickness, and comparing the fourth correlation verification coefficient with a correlation coefficient threshold value to obtain a fourth verification result;
wherein the fourth linear regression equation is: y is4＝0.9811x4+0.0144；
In the formula: x is the number of4-a proof value for H ≥ 300mm inorganic binder in stable semi-rigid base layer;
y4h is more than or equal to 300mm of the standard value in the semi-rigid base layer of inorganic binder stability;
the fourth correlation verification coefficient R4 2＝0.9993。
Specifically, in the embodiment of the present invention, if the first correlation verification coefficient, the second correlation verification coefficient, the third correlation verification coefficient, and the fourth correlation verification coefficient are all greater than the correlation coefficient threshold, the specific value of the given x, y, z formula constant is an accurate value.
Specifically, in the embodiment of the present invention, the calculation formula of the deflection value temperature correction calculation is as follows:
l20＝lT×K3
in the formula: l20-corrected deflection values for pellet and asphalt stabilized base temperature;
lT-a dynamic deflection value; k3-a temperature correction factor.
More specifically, the deflection value is an important index for designing and detecting highway pavement highway engineering, the calculation of the deflection value relates to actually measured or estimated temperature of points in a granular material layer during measurement, the correction calculation of a field deflection detection value and the evaluation calculation of items such as deflection detection and the like, and the participation of a deflection temperature correction coefficient is avoided. At present, a calculation method of a deflection value and a temperature correction method thereof are determined in the existing JTG3450-2019 which is a highway subgrade and pavement site test regulation. However, when the average temperature of the inorganic binder stable semi-rigid base layer is between 0 ℃ and 20 ℃, the deflection value temperature correction calculation of the inorganic binder stable semi-rigid base layer in structural layers with different depths is calculated by combining an actual measured deflection value and a temperature correction coefficient on site, and the calculation of the temperature correction coefficient needs to replace different calculation methods according to different thicknesses of the structural layers, so that the error rate of the deflection value temperature correction calculation is increased, and the efficiency of the deflection value temperature correction calculation is seriously influenced. The temperature correction coefficient is calculated as follows:
the invention provides a temperature correction method for 0-20 ℃ deflection value of an inorganic binder stable base layer, which can be replaced by the calculation method when the average temperature T of the inorganic binder stable semi-rigid base layer is in the range of 0-20 DEG CThe method for calculating the deflection value temperature correction in different depth structural layers of the existing 'highway subgrade and pavement site test regulation JTG 3450-2019' enables the deflection temperature correction coefficient values in different depth structural layers to be calculated by using a unified calculation method and applying a unified calculation formula:
the temperature correction coefficient values in different depth structural layers during deflection measurement can be calculated, so that the efficiency of deflection value temperature correction calculation is improved. Compared with the prior art, the technical scheme of the invention can improve the calculation efficiency of temperature correction calculation of the deflection value when the average temperature of the inorganic binder stable semi-rigid base layer is 0-20 ℃.
In view of the above, the temperature correction method for 0-20 ℃ deflection values of an inorganic binder stabilized base layer according to the embodiment of the present invention can use a unified calculation method for the deflection temperature correction coefficient values in different depth structural layers of an inorganic binder stabilized semi-rigid base layer, and can calculate the deflection temperature correction values in different depth structural layers of a particle material road table without changing formula constants, thereby improving the efficiency of deflection value temperature correction calculation. Compared with the prior art, the technical scheme of the invention can improve the calculation efficiency of temperature correction calculation of the deflection value when the average temperature of the inorganic binder stable semi-rigid base layer is 0-20 ℃.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A temperature correction method for 0-20 ℃ deflection value of an inorganic binder stabilized base layer is characterized by comprising the following steps:
s1: collecting the thickness H and the average temperature T of the inorganic binder stable semi-rigid base layer during deflection measurement, and determining that the numerical range of the average temperature T is between 0 and 20 ℃;
s2: obtaining the dynamic deflection value l of the inorganic binder stable base layer according to the thickness and the average temperature of the base layerT；
S3: acquiring a temperature correction coefficient: preliminary derivation formula K 'for calculating preset temperature correction coefficient'3(x,y,z)；
S4: calling a test procedure temperature correction coefficient calculation formula to obtain a standard value, referred to as a standard value, of the temperature correction coefficient in different depth structure layers of the inorganic binder stable semi-rigid base layer at 0-20 ℃;
s5: constructing a data substitution calculation model based on a preliminary derivation formula; substituting the data into a calculation model to give different formula constants for x, y and z, and calculating to obtain estimated values of temperature correction coefficients in different depth structural layers of the stable semi-rigid base layer at 0-20 ℃ according to a preliminary derivation formula, which are referred to as estimated values for short;
s6: substituting the input data of the standard value into the calculation model, performing difference value comparison analysis and correlation comparison analysis on the input data of the standard value and the corresponding presumed value, and obtaining a comparison difference value and a correlation coefficient;
s7: presetting a difference threshold and a correlation coefficient threshold, and inputting the difference threshold and the correlation coefficient threshold into data to be substituted into a calculation model to perform comparative analysis with the comparison difference and the correlation coefficient;
s8: determining specific values of formula constants x, y and z based on whether the result of the contrastive analysis meets the threshold requirement, and substituting the specific values into a preliminary derivation formula to obtain a preliminary calculation formula of the temperature correction coefficient value;
s9: calculating to obtain verification values of temperature correction coefficients in different depth structural layers by using a primary calculation formula, and the verification values are shortened; carrying out correlation verification analysis on the verification value and the corresponding standard value to determine the accuracy of the x, y and z formula constants;
s10: after the x, y and z formula constants are verified, substituting the formula constants into the formula constants with accurate verification to obtain the value of 0-2Unified calculation formula K for temperature correction coefficient values in different depth structural layers of 0 ℃ inorganic binder stable semi-rigid base layer3(H,T)Based on the unified calculation formula K3(H,T)Obtaining a deflection temperature correction coefficient value K3；
S11: and calculating the deflection value after temperature correction by combining the dynamic deflection value and the temperature correction coefficient.
2. The method of claim 1, wherein the preliminary derivation formula of the deflection temperature correction coefficient calculation is:
K′3(x,y,z)＝e{x(Iny-1)H+z}(20-T)
in the formula: t-average temperature of the semi-rigid base layer stabilized by the inorganic binder during deflection measurement; h, stabilizing the thickness of the semi-rigid base layer by the inorganic binder; x, y, z-constant of formula to be measured.
3. The method of claim 1, wherein the threshold difference value is 0.10 and the threshold correlation coefficient value is 0.99.
4. The method for temperature modification of 0-20 ℃ deflection value of an inorganic binder stabilized base layer according to claim 3, wherein the comparison rule of whether the comparison result satisfies the threshold requirement in S6 includes:
if the contrast difference between the presumed value and the standard value is less than or equal to 0.10 and the correlation coefficient is greater than 0.99, determining that the specific value of the given x, y, z formula constant at the moment meets the requirement of a threshold;
otherwise, determining that the specific value of the constant of the given x, y and z formula does not meet the requirement of the threshold value.
5. The method of claim 4, wherein the step of temperature-correcting the 0-20 ℃ deflection value of the inorganic binder stabilized base layer comprises, in step S6: s601: if the comparison difference value and the correlation coefficient meet the threshold requirement, selecting a specific value of a constant of a given x, y and z formula at the moment and entering the next step; s602: if the comparison difference or the correlation coefficient does not meet the threshold requirement, returning to the step S3 to give x, y and z different formula constants again, and repeating the steps from the step S3 to the step S6.
6. The method of claim 1, wherein the correlation verification analysis comprises: when the average temperature in the inorganic binder stable semi-rigid base layer is between 0 and 20 ℃, a comparison analysis chart and a correlation analysis chart of verification values and standard values in structural layers with different depths are constructed, correlation verification coefficients of the verification values and the standard values in the structural layers with different depths are obtained through analysis based on the correlation analysis chart, the correlation verification coefficients are compared with the correlation coefficient threshold values, and verification results are obtained.
7. The method of claim 6, wherein the correlation validation factor is compared to the correlation factor threshold value by a rule of 0-20 ℃ deflection value of the inorganic binder stabilized base layer:
if the correlation verification coefficients in the different depth structural layers are all larger than the correlation coefficient threshold, judging that the specific values of the given x, y and z formula constants are accurate;
and if the correlation verification coefficient in the structural layers with different depths is smaller than the correlation coefficient threshold, judging that the specific value of the given x, y and z formula constant is inaccurate.
8. The method of claim 7, wherein the S8 includes: s801: if the specific value of the given x, y and z formula constant is judged to be accurate, the specific value of the given x, y and z formula constant at the moment is selected and the next step is carried out; s802: if the specific values of the given x, y and z formula constants are not accurate, returning to the step S3 to give different formula constants to x, y and z again, and repeating the steps from the step S3 to the step S7.
9. The method of claim 8, wherein the formula constants x, y, z are specifically: x is 2.5X 10-5,y＝6,z＝4×10-3。
10. The method of claim 9, wherein the step of temperature correction of 0-20 ℃ deflection value of the inorganic binder stabilized base layer is based on a unified formula K3(H,T)Obtaining the deflection temperature correction coefficient value comprises:
s901: obtaining the average temperature T and the thickness H of the structural layer in different depth structural layers during deflection measurement; wherein the numerical range of the average temperature is more than 0 ℃ and less than or equal to 20 ℃;
s902: substituting the average temperature T and the thickness H of the structural layer into the unified calculation formula K3(H,T)Calculating to obtain a deflection temperature correction coefficient value;
wherein the unified calculation formula
In the formula: t-average temperature of the semi-rigid base layer stabilized by the inorganic binder during deflection measurement;
h-inorganic binder stabilizes the thickness of the semi-rigid substrate.
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