Fabricated airport runway structure seaworthiness performance prediction method

Abstract

The invention relates to an assembly type airport runway structure seaworthiness performance prediction method. The method comprises the steps of collecting a strain value at a joint of an assembly type airport runway; carrying out statistical analysis on the strain value; calculating the effective length of the pavement slab; working condition coefficients are calculated according to the effective length of the pavement slab and the pavement geometric parameters; calculating the deformation of the pavement slab under the load effect of the designed airplane; correcting the deformation of the pavement slab; detecting the actual deformation of the pavement slab of the assembly type airport runway; calculating the airworthiness performance coefficient of the pavement structure; judging whether the pavement structure performance meets airworthiness requirements or not; sending a pavement structure performance alarm signal to a user; and outputting a pavement airworthiness performance prediction report. According to the method, quantitative prediction of the airworthiness performance of the fabricated airport runway structure can be achieved, the joint load transfer capacity and the interlayer combination state of the fabricated runway can be comprehensively considered, the deformation of the runway structure is predicted in a mode of combining measured data and theoretical calculation, and the airworthiness performance of the runway structure is evaluated accordingly.

Description

Technical Field

[0001] The invention belongs to the technical field of airport engineering, and in particular relates to a method for predicting the airworthiness performance of an assembled airport runway structure. Background Art

[0002] With the rapid development of aviation transportation, the safety and durability of airport runways have received more and more attention. As a new type of structure, prefabricated airport runways are gradually being used due to their advantages such as fast construction speed and convenient maintenance. However, the special structural form of prefabricated runways, especially their joints and interlayer bonding states, pose new challenges to their bearing performance and durability.

[0003] The existing methods for evaluating the airworthiness of airport runways are mainly designed for traditional cast-in-place runway designs, but for prefabricated runways, these methods may not be able to accurately evaluate their performance. The particularity of prefabricated runways lies in the obvious differences between the joints between the pavement panels and the bonding state between the pavement panels and the base layer and the cast-in-place runways. There is a bite force between the aggregates of the pavement panels of the cast-in-place runway, so the two adjacent pavement panels transfer loads together through the bite force between the force transfer rods and the aggregates, while the two adjacent pavement panels of the prefabricated pavement mainly rely on the connectors to transfer loads. In addition, the cast-in-place runway is directly cast and formed at the construction site. The concrete will form a whole with the base layer during the pouring process, and the pavement panels and the base layer are more tightly bonded. In contrast, the pavement panels of the prefabricated runway are prefabricated and transported to the site for installation. The pavement panels and the base layer are usually assembled by dry connection, such as welding with embedded connectors or connecting through a functional layer (such as a mortar layer or sand layer), so there is a certain isolation between the pavement panels and the base layer. Therefore, under the influence of different construction processes and materials, the bonding state between the slab and the base of cast-in-place runways and prefabricated runways shows different characteristics, and these factors largely determine the deformation behavior of the runway under aircraft loads. In order to accurately predict the airworthiness of prefabricated airport runways, a new method is needed to evaluate their structural performance. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a method for predicting the airworthiness performance of an assembled airport runway structure.

[0005] In order to achieve the above-mentioned object, the method for predicting the airworthiness performance of an assembled airport runway structure provided by the present invention comprises the following steps performed in sequence:

[0006] 1) System idle S1 stage: The system waits for user instructions. When the user issues an instruction to perform airworthiness performance prediction, it enters S2 stage;

[0007] 2) S2 stage of judging whether to perform airworthiness performance prediction: the system judges whether to perform airworthiness performance prediction of the prefabricated airport runway structure according to the user's instruction. If the judgment result is "yes", it enters S3 stage; otherwise, it returns to S1 stage;

[0008] 3) S3 stage of collecting strain values ​​at the joints of the prefabricated airport runway: strain sensors are arranged at the joints of multiple adjacent runway panels on the prefabricated airport runway, and then the same load is applied to the joints using the same load application method, and the strain values ​​at the joints are collected using the strain sensors;

[0009] 4) S4 stage of statistical analysis of strain values: calculate the mean and standard deviation of all strain values ​​ε collected in step 3), then judge the strain values ​​ε that deviate from the mean by more than 3 times the standard deviation under the assumption of normal distribution as outliers and remove them, and then calculate the 90% to 98% quantiles of the strain values ​​ε after removing the outliers;

[0010] 5) S5 stage of calculating the effective length of the road panel based on the statistical analysis results of the strain value: the effective length of the road panel l va The calculation formula is:

[0011] l va =ηl re

[0012] Where: l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; η is the effective length coefficient of the road panel, which is calculated by the following formula:

[0013]

[0014] Where: ε test is the measured strain value at the joint of the road panel; ε max is the maximum strain value that can be tolerated at the pavement panel joint, and according to the pavement airworthiness requirements, the 90%-98% quantile of the strain value ε obtained in step 4) after removing the outliers is taken;

[0015] 6) S6 stage of calculating the operating coefficient based on the effective length of the road panel and the road surface geometric parameters: The operating coefficient γ is calculated by the following formula:

[0016] γ=T 2 / k 2 -1

[0017] Where: k is the reaction modulus of the soil foundation, which can be obtained through geotechnical tests; T is the horizontal temperature force generated by the road panel under the action of temperature stress, which can be calculated by the following formula:

[0018] T=σ x bh re

[0019] Where: b is the width of the road panel, usually 4.5m or 5m; h re is the thickness of the road panel; x is the horizontal temperature stress on the road panel during the cooling process, which is calculated by the following formula:

[0020]

[0021] Where: α v is the thermal expansion coefficient; E is the Young's modulus of the road panel; T v is the temperature difference between the road slab and the upper surface of the soil foundation; l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; l va is the effective length of the road panel; the value of ζ is calculated by the following formula:

[0022]

[0023] Where: C x is the horizontal resistance coefficient of the foundation, which can be obtained through geotechnical tests;

[0024] 7) Stage S7 of judging whether the operating coefficient is equal to 0: judging whether the operating coefficient γ obtained in step 6) is equal to 0, if the operating coefficient γ is equal to 0, then entering stage S9; if the operating coefficient γ is not equal to 0, then entering stage S8;

[0025] 8) Determine whether the operating condition coefficient is greater than 0 and define the operating condition type according to the operating condition coefficient S8 stage: Determine whether the operating condition coefficient γ obtained in step 6) is greater than 0. If the operating condition coefficient γ is greater than 0, enter the S10 stage; if the operating condition coefficient γ is less than 0, enter the S11 stage; then define the case where the operating condition coefficient γ = 0 as operating condition 1, the case where the operating condition coefficient γ> 0 is defined as operating condition 2, and the case where the operating condition coefficient γ< 0 is defined as operating condition 3;

[0026] 9) Calculate the deformation of the pavement panel under the design aircraft load in working condition 1. S9 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in working condition 1. de , the formula is:

[0027]

[0028] Where: is the flexibility coefficient of the road panel; x is the distance from any point on the road panel to the midpoint of the road panel; is the section inertia moment of the road panel; va The load effect of the standard aircraft model selected in the airport runway design stage; Ci are the unknown coefficients, where i = 1, 2, 3, 4, obtained by solving the following system of equations:

[0029]

[0030] Where: y l is the displacement at the midpoint of the road panel, and its value can be 0; θ0 is the rotation angle at the midpoint of the road panel, and its value can be 0; M l is the bending moment at the midpoint of the road panel, and its value can be 0; Q0 is the shear force at the midpoint of the road panel, and its value can be -P va / 2;

[0031] 10) Calculate the deformation of the pavement panel under the design aircraft load in the second working condition S10 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the second working condition de , the formula is:

[0032]

[0033] where λ i Calculate using the following formula, i = 1, 2, 3, 4:

[0034]

[0035] Undetermined coefficient C i Obtained by solving the following system of equations, where i = 1, 2, 3, 4:

[0036]

[0037] 11) Calculate the deformation of the pavement panel under the design aircraft load in the third working condition S11 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the third working condition de , the formula is:

[0038]

[0039] Undetermined coefficient C i Obtained by solving the following system of equations, where i = 1, 2, 3, 4:

[0040]

[0041] 12) S12 stage, which is to correct the deformation of the pavement slab under the above three working conditions by considering the interlayer bonding state: First, the bonding strength σ between the pavement slab and the base layer of the prefabricated runway is obtained through on-site test or laboratory test. pAnd the bonding strength between the pavement panel and the base of the conventional rigid runway σ r , and then the deformation of the pavement panel of the prefabricated runway under the load is corrected. The corrected deformation of the pavement panel is:

[0042] y d =δ·y de

[0043] Where: y d is the modified pavement slab deformation considering the interlayer bonding state; δ is the pavement slab deformation correction coefficient considering the interlayer bonding state, which is calculated by the following formula:

[0044] δ=σ p / σ r

[0045] The maximum deformation of the road slab considering the interlayer bonding state is denoted as y dmax ;

[0046] 13) Detecting the actual deformation of the pavement panel of the prefabricated airport runway S13 stage: by arranging sensors on the pavement panel to detect the maximum deformation y of the pavement panel under the load of the aircraft each time during the take-off process rei , where i = 1, 2, 3, ...;

[0047] 14) Calculation of the airworthiness performance coefficient of the pavement structure in step S14: The maximum deformation of the pavement panel considering the interlayer bonding state obtained in step 12) is y d max , the maximum deformation y of the road panel obtained in step 13) rei And the aircraft traffic volume, calculate the pavement structure airworthiness performance coefficient, the formula is:

[0048]

[0049] Where: N de is the cumulative design flight times of the runway. If this parameter is not available during the runway design and construction phase, it can be calculated using the following formula:

[0050] N de =S×q

[0051] Where: S is the design service life of the runway; q is the annual design aircraft traffic volume;

[0052] 15) Determine whether the pavement structure performance meets the airworthiness requirements in S15: According to the pavement structure airworthiness performance coefficient obtained in step 14) To determine whether the pavement structure performance meets the airworthiness requirements, if the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance meets the airworthiness requirements, and the process returns to S13. If the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance does not meet the airworthiness requirements and enters the S16 stage;

[0053] 16) S16 stage of sending a pavement structure performance warning signal to the user: the pavement structure airworthiness performance coefficient obtained in step 14) is converted to The specific value is sent to the user, warning the user that the pavement structure performance can no longer meet the airworthiness requirements and feeding back the position and historical deformation parameters of the pavement panel;

[0054] 17) Determine whether to end the pavement airworthiness performance prediction S17 stage: Determine whether to end the pavement airworthiness performance prediction according to the user demand instruction: If the judgment result is "yes", enter the S18 stage; otherwise return to the S13 stage;

[0055] 18) S18 stage of outputting pavement airworthiness performance prediction report: Outputting the pavement airworthiness performance prediction report of the entire prediction area, including whether the pavement area division meets the airworthiness requirements, the specific value of the airworthiness performance coefficient of each pavement panel, the historical deformation data of each pavement panel and the pavement panel structural performance parameters, thus completing the entire prediction process.

[0056] In step 3), the loads include the impact load applied by the drop weight deflectometer, the aircraft load during take-off and landing, and the moving load of the heavy-loaded truck; for the prediction of the airworthiness performance of prefabricated airport runways in a medium or large range, the strain values ​​at the measured joints shall be no less than 200 sets of data, and for the prediction of the airworthiness performance of prefabricated airport runways in a small range, the strain values ​​at the measured joints shall be no less than 100 sets of data.

[0057] The method for predicting the airworthiness performance of the prefabricated airport runway structure provided by the present invention can realize the quantitative prediction of the airworthiness performance of the prefabricated airport runway structure. It is characterized by being able to comprehensively consider the joint load transfer capacity and interlayer bonding state of the prefabricated runway, and predict the deformation of the runway structure by combining measured data with theoretical calculations, and evaluate the airworthiness performance of the runway structure accordingly. In addition, the method can also provide customized prediction reports according to user needs, providing scientific decision-making basis for airport managers. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A flow chart of the method for predicting the airworthiness performance of an assembled airport runway structure provided by the present invention. DETAILED DESCRIPTION

[0059] The present invention will be described in detail below with reference to the accompanying drawings.

[0060] like Figure 1As shown, the method for predicting the airworthiness performance of the assembled airport runway structure provided by the present invention comprises the following steps performed in sequence:

[0061] 1) System idle S1 stage: The system waits for user instructions. When the user issues an instruction to perform airworthiness performance prediction, it enters S2 stage;

[0062] 2) S2 stage of judging whether to perform airworthiness performance prediction: the system judges whether to perform airworthiness performance prediction of the prefabricated airport runway structure according to the user's instruction. If the judgment result is "yes", it enters S3 stage; otherwise, it returns to S1 stage;

[0063] 3) S3 stage of collecting strain values ​​at the joints of the prefabricated airport runway: strain sensors are arranged at the joints of multiple adjacent runway panels on the prefabricated airport runway, and then the same load is applied to the joints using the same load application method, and the strain values ​​at the joints are collected using the strain sensors;

[0064] The loads include the impact load applied by the drop weight deflectometer, the aircraft load during take-off and landing, and the moving load of heavy-loaded trucks; for the prediction of the airworthiness performance of prefabricated airport runways in a medium or large range, the strain values ​​at the joints shall be measured for no less than 200 sets of data; for the prediction of the airworthiness performance of prefabricated airport runways in a small range, the strain values ​​at the joints shall be measured for no less than 100 sets of data.

[0065] 4) S4 stage of statistical analysis of strain values: calculate the mean and standard deviation of all strain values ​​ε collected in step 3), then judge the strain values ​​ε that deviate from the mean by more than 3 times the standard deviation under the assumption of normal distribution as outliers and remove them, and then calculate the 90% to 98% quantiles of the strain values ​​ε after removing the outliers;

[0066] 5) S5 stage of calculating the effective length of the pavement panel based on the statistical analysis results of the strain value: Due to the differences in the joint conditions between the pavement panels, the force transmission forms of the pavement panels are obviously different, which ultimately leads to differences in the deformation of the pavement panels under the same aircraft load, and the effective length of the pavement panel l va It is one of the important parameters to quantify the change of pavement slab deformation caused by the difference in joint conditions. The effective length of the pavement slab l va The calculation formula is:

[0067] l va =ηl re

[0068] Where: l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; η is the effective length coefficient of the road panel, which is calculated by the following formula:

[0069]

[0070] Where: ε test is the measured strain value at the joint of the road panel; ε max is the maximum strain value that can be tolerated at the pavement panel joint, which can be obtained by taking the 90%-98% quantile of the strain value ε obtained in step 4) after removing the outliers according to the pavement airworthiness requirements;

[0071] 6) S6 stage of calculating the operating coefficient based on the effective length of the road panel and the road surface geometric parameters: The operating coefficient γ is calculated by the following formula:

[0072] γ=T 2 / k 2 -1

[0073] Where: k is the reaction modulus of the soil foundation, which can be obtained through geotechnical tests; T is the horizontal temperature force generated by the road panel under the action of temperature stress, which can be calculated by the following formula:

[0074] T=σ x bh re

[0075] Where: b is the width of the road panel, usually 4.5m or 5m; h re is the thickness of the road panel; x is the horizontal temperature stress on the panel during the cooling process, which can be calculated by the following formula:

[0076]

[0077] Where: α v is the thermal expansion coefficient; E is the Young's modulus of the road panel; T v is the temperature difference between the road slab and the upper surface of the soil foundation; l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; l va is the effective length of the road panel; the value of ζ can be calculated by the following formula:

[0078]

[0079] Where: C x is the horizontal resistance coefficient of the foundation, which can be obtained through geotechnical tests;

[0080] 7) Stage S7 of judging whether the operating coefficient is equal to 0: judging whether the operating coefficient γ obtained in step 6) is equal to 0, if the operating coefficient γ is equal to 0, then entering stage S9; if the operating coefficient γ is not equal to 0, then entering stage S8;

[0081] 8) Determine whether the operating condition coefficient is greater than 0 and define the operating condition type according to the operating condition coefficient S8 stage: Determine whether the operating condition coefficient γ obtained in step 6) is greater than 0. If the operating condition coefficient γ is greater than 0, enter the S10 stage; if the operating condition coefficient γ is less than 0, enter the S11 stage; then define the case where the operating condition coefficient γ = 0 as operating condition 1, the case where the operating condition coefficient γ> 0 is defined as operating condition 2, and the case where the operating condition coefficient γ< 0 is defined as operating condition 3;

[0082] Under working condition 1, the horizontal temperature force T generated by the pavement slab under the action of temperature stress is equal to the reaction modulus k of the soil foundation. This working condition is only applicable to the special case where the horizontal temperature force T generated by the pavement slab under the action of temperature stress is close to the reaction modulus k of the soil foundation. Under working condition 2, the horizontal temperature force T generated by the pavement slab under the action of temperature stress is significantly greater than the reaction modulus k of the soil foundation. This working condition often occurs in the early stage of airport runway construction and use. During this period, the joints of the pavement slab are generally not cracked, the temperature difference between day and night in the airport runway environment is large, or the hydration reaction of the concrete pavement slab is more intense. Under working condition 3, the horizontal temperature force T generated by the pavement slab under the action of temperature stress is less than the reaction modulus k of the soil foundation. This working condition is applicable to the normal service stage of the airport runway. During this period, the joints of the pavement slab are generally completely cracked, the temperature change range of the airport runway environment is small, and the hydration heat of the concrete can be ignored.

[0083] 9) Calculate the deformation of the pavement panel under the design aircraft load in working condition 1. S9 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in working condition 1. de , the formula is:

[0084]

[0085] Where: is the flexibility coefficient of the road panel; x is the distance from any point on the road panel to the midpoint of the road panel; is the section inertia moment of the road panel; va The load effect of the standard aircraft model selected in the airport runway design stage; C i are unknown coefficients, where i = 1, 2, 3, 4, and can be obtained by solving the following system of equations:

[0086]

[0087] Where: y l is the displacement at the midpoint of the road panel, and its value can be 0; θ0 is the rotation angle at the midpoint of the road panel, and its value can be 0; M l is the bending moment at the midpoint of the road panel, and its value can be 0; Q0 is the shear force at the midpoint of the road panel, and its value can be -Pva / 2;

[0088] 10) Calculate the deformation of the pavement panel under the design aircraft load in the second working condition S10 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the second working condition de , the formula is:

[0089]

[0090] where λ i It can be calculated by the following formula, i = 1, 2, 3, 4:

[0091]

[0092] Undetermined coefficient C i It can be obtained by solving the following system of equations, where i = 1, 2, 3, 4:

[0093]

[0094] 11) Calculate the deformation of the pavement panel under the design aircraft load in the third working condition S11 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the third working condition de , the formula is:

[0095]

[0096] Undetermined coefficient C i It can be obtained by solving the following system of equations, where i = 1, 2, 3, 4:

[0097]

[0098] 12) S12 stage for correcting the deformation of the pavement panels under the above three working conditions by considering the interlayer bonding state: Compared with conventional rigid runways, there is a significant difference in the bonding state between the pavement panels and the base layer of prefabricated runways. The bonding performance between the pavement panels and the base layer of prefabricated runways is generally difficult to reach the bonding level between the pavement panels and the base layer of conventional rigid runways cast on site. This difference will cause a significant change in the deformation of the pavement panels under the action of aircraft loads. Therefore, the bonding strength σ between the pavement panels and the base layer of prefabricated runways can be obtained through on-site test or laboratory test. p And the bonding strength between the pavement panel and the base of the conventional rigid runway σ r , and then the deformation of the pavement panel of the prefabricated runway under the load is corrected. The corrected deformation of the pavement panel is:

[0099] yd =δ·y de

[0100] Where: y d is the modified pavement slab deformation considering the interlayer bonding state; δ is the pavement slab deformation correction coefficient considering the interlayer bonding state, which can be calculated by the following formula:

[0101] δ=σ p / σ r

[0102] The maximum deformation of the road slab considering the interlayer bonding state is denoted as y dmax ;

[0103] 13) Detecting the actual deformation of the pavement panel of the prefabricated airport runway S13 stage: by arranging sensors on the pavement panel to detect the maximum deformation y of the pavement panel under the load of the aircraft each time during the take-off process rei , where i = 1, 2, 3, ...;

[0104] 14) Calculation of the airworthiness performance coefficient of the pavement structure S14: In this stage, the maximum deformation of the pavement panel considering the interlayer bonding state obtained in step 12) is calculated. d max , the maximum deformation y of the road panel obtained in step 13) rei And the aircraft traffic volume, calculate the pavement structure airworthiness performance coefficient, the formula is:

[0105]

[0106] Where: N de is the cumulative design flight times of the runway. If this parameter is not available during the runway design and construction phase, it can be calculated using the following formula:

[0107] N de =S×q

[0108] Where: S is the design service life of the runway; q is the annual design aircraft traffic volume;

[0109] 15) Determine whether the pavement structure performance meets the airworthiness requirements in S15: According to the pavement structure airworthiness performance coefficient obtained in step 14) To determine whether the pavement structure performance meets the airworthiness requirements, if the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance meets the airworthiness requirements, and the process returns to S13. If the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance does not meet the airworthiness requirements and enters the S16 stage;

[0110] 16) S16 stage of sending a pavement structure performance warning signal to the user: the pavement structure airworthiness performance coefficient obtained in step 14) is converted to The specific value is sent to the user, warning the user that the pavement structure performance can no longer meet the airworthiness requirements and feeding back the position and historical deformation parameters of the pavement panel;

[0111] 17) Determine whether to end the pavement airworthiness performance prediction S17 stage: Determine whether to end the pavement airworthiness performance prediction according to the user demand instruction: If the judgment result is "yes", enter the S18 stage; otherwise return to the S13 stage;

[0112] 18) S18 stage of outputting pavement airworthiness performance prediction report: Outputting the pavement airworthiness performance prediction report of the entire prediction area, including whether the pavement area division meets the airworthiness requirements, the specific value of the airworthiness performance coefficient of each pavement panel, the historical deformation data of each pavement panel and the pavement panel structural performance parameters, thus completing the entire prediction process.

Claims

1. A method for predicting the airworthiness performance of an assembled airport runway structure, characterized in that: The method for predicting the airworthiness performance of an assembled airport runway structure comprises the following steps performed in sequence: 1) System idle S1 stage: The system waits for user instructions. When the user issues an instruction to perform airworthiness performance prediction, it enters S2 stage; 2) S2 stage of judging whether to perform airworthiness performance prediction: the system judges whether to perform airworthiness performance prediction of the prefabricated airport runway structure according to the user's instruction. If the judgment result is "yes", it enters S3 stage; otherwise, it returns to S1 stage; 3) S3 stage of collecting strain values ​​at the joints of the prefabricated airport runway: strain sensors are arranged at the joints of multiple adjacent runway panels on the prefabricated airport runway, and then the same load is applied to the joints using the same load application method, and the strain values ​​at the joints are collected using the strain sensors; 4) S4 stage of statistical analysis of strain values: calculate the mean and standard deviation of all strain values ​​ε collected in step 3), then judge the strain values ​​ε that deviate from the mean by more than 3 times the standard deviation under the assumption of normal distribution as outliers and remove them, and then calculate the 90% to 98% quantiles of the strain values ​​ε after removing the outliers; 5) S5 stage of calculating the effective length of the road panel based on the statistical analysis results of the strain value: the effective length of the road panel l va The calculation formula is: the va =ηl re Where: l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; η is the effective length coefficient of the road panel, which is calculated by the following formula: Where: ε test is the measured strain value at the joint of the road panel; ε max is the maximum strain value that can be tolerated at the pavement panel joint, and according to the pavement airworthiness requirements, the 90%-98% quantile of the strain value ε obtained in step 4) after removing the outliers is taken; 6) S6 stage of calculating the operating coefficient based on the effective length of the road panel and the road surface geometric parameters: The operating coefficient γ is calculated by the following formula: γ=T 2 / k 2 -1 Where: k is the reaction modulus of the soil foundation, which can be obtained through geotechnical tests; T is the horizontal temperature force generated by the road panel under the action of temperature stress, which can be calculated by the following formula: T=σ x b re Where: b is the width of the road panel, which can be 4.5m or 5m; h re is the thickness of the road panel; x is the horizontal temperature stress on the road panel during the cooling process, which is calculated by the following formula: Where: α v is the thermal expansion coefficient; E is the Young's modulus of the road panel; T v is the temperature difference between the road slab and the upper surface of the soil foundation; l re is the actual length of the road panel, which is 4.5m or 5.0m in actual projects; l va is the effective length of the road panel; the value of ζ is calculated by the following formula: Where: C x is the horizontal resistance coefficient of the foundation, which can be obtained through geotechnical tests; 7) Stage S7 of judging whether the operating coefficient is equal to 0: judging whether the operating coefficient γ obtained in step 6) is equal to 0, if the operating coefficient γ is equal to 0, then entering stage S9; if the operating coefficient γ is not equal to 0, then entering stage S8; 8) Determine whether the operating condition coefficient is greater than 0 and define the operating condition type according to the operating condition coefficient S8 stage: Determine whether the operating condition coefficient γ obtained in step 6) is greater than 0. If the operating condition coefficient γ is greater than 0, enter the S10 stage; if the operating condition coefficient γ is less than 0, enter the S11 stage; then define the case where the operating condition coefficient γ = 0 as operating condition 1, the case where the operating condition coefficient γ> 0 is defined as operating condition 2, and the case where the operating condition coefficient γ< 0 is defined as operating condition 3; 9) Calculate the deformation of the pavement panel under the design aircraft load in working condition 1. S9 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in working condition 1. de , the formula is: Where: is the flexibility coefficient of the road panel; x is the distance from any point on the road panel to the midpoint of the road panel; is the section inertia moment of the road panel; va The load effect of the standard aircraft model selected in the airport runway design stage; C i are the unknown coefficients, where i = 1, 2, 3, 4, obtained by solving the following system of equations: Where: y l is the displacement at the midpoint of the road panel, and its value can be 0; θ0 is the rotation angle at the midpoint of the road panel, and its value can be 0; M l is the bending moment at the midpoint of the road panel, and its value can be 0; Q0 is the shear force at the midpoint of the road panel, and its value can be -P va / 2; 10) Calculate the deformation of the pavement panel under the design aircraft load in the second working condition S10 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the second working condition de , the formula is: where λ i Calculate using the following formula, i = 1, 2, 3, 4: Undetermined coefficient C i Obtained by solving the following system of equations, where i = 1, 2, 3, 4: 11) Calculate the deformation of the pavement panel under the design aircraft load in the third working condition S11 stage: According to the load of the standard aircraft model selected in the airport runway design stage and the pavement structure parameters, calculate the deformation y of any point on the pavement panel under the modified standard load in the third working condition de , the formula is: Undetermined coefficient C i Obtained by solving the following system of equations, where i = 1, 2, 3, 4: 12) S12 stage, in which the deformation of the pavement slab under the above three working conditions is corrected by considering the interlayer bonding state: First, the bonding strength σp of the pavement slab of the prefabricated runway and the bonding strength σ of the pavement slab of the conventional rigid runway are obtained through on-site test or laboratory test. r , and then the deformation of the pavement panel of the prefabricated runway under the load is corrected. The corrected deformation of the pavement panel is: and d =δ·y de Where: y d is the modified pavement slab deformation considering the interlayer bonding state; δ is the pavement slab deformation correction coefficient considering the interlayer bonding state, which is calculated by the following formula: d=s p / s r The maximum deformation of the road slab considering the interlayer bonding state is denoted as y dmax ; 13) Detecting the actual deformation of the pavement panel of the prefabricated airport runway S13 stage: by arranging sensors on the pavement panel, the maximum deformation y of the pavement panel under the load of the aircraft during each takeoff process is detected. rei , where i = 1, 2, 3, ...; 14) Calculation of the airworthiness performance coefficient of the pavement structure in step S14: The maximum deformation of the pavement panel considering the interlayer bonding state obtained in step 12) is y d max , the maximum deformation y of the road panel obtained in step 13) rei And the aircraft traffic volume, calculate the pavement structure airworthiness performance coefficient, the formula is: Where: N de is the cumulative design flight times of the runway. If this parameter is not available during the runway design and construction phase, it can be calculated using the following formula: N de =S×q Where: S is the design service life of the runway; q is the annual design aircraft traffic volume; 15) Determine whether the pavement structure performance meets the airworthiness requirements in S15: According to the pavement structure airworthiness performance coefficient obtained in step 14) To determine whether the pavement structure performance meets the airworthiness requirements, if the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance meets the airworthiness requirements, and the process returns to S13. If the pavement structure airworthiness performance coefficient It is judged that the pavement structure performance does not meet the airworthiness requirements and enters the S16 stage; 16) S16 stage of sending a pavement structure performance warning signal to the user: the pavement structure airworthiness performance coefficient obtained in step 14) is converted to The specific value is sent to the user, warning the user that the pavement structure performance can no longer meet the airworthiness requirements and feeding back the position and historical deformation parameters of the pavement panel; 17) Determine whether to end the pavement airworthiness performance prediction S17 stage: Determine whether to end the pavement airworthiness performance prediction according to the user demand instruction: If the judgment result is "yes", enter the S18 stage; otherwise, return to the S13 stage; 18) S18 stage of outputting pavement airworthiness performance prediction report: Outputting the pavement airworthiness performance prediction report of the entire prediction area, including whether the pavement area division meets the airworthiness requirements, the specific value of the airworthiness performance coefficient of each pavement panel, the historical deformation data of each pavement panel and the pavement panel structural performance parameters, thus completing the entire prediction process.

2. The method for predicting the airworthiness performance of an assembled airport runway structure according to claim 1 is characterized by: In step 3), the loads include the impact load applied by the drop weight deflectometer, the aircraft load during take-off and landing, and the moving load of the heavy-loaded truck; for the prediction of the airworthiness performance of prefabricated airport runways in a medium or large range, the strain values ​​at the measured joints shall be no less than 200 sets of data, and for the prediction of the airworthiness performance of prefabricated airport runways in a small range, the strain values ​​at the measured joints shall be no less than 100 sets of data.

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