Assembly type airport pavement bearing state detection and evaluation method based on high-speed deflectometer

Abstract

The invention discloses a method for detecting and evaluating the bearing state of an assembled airport pavement based on a high-speed deflectometer, relates to the technical field of airport engineering, and can be applied to the detection and evaluation of the bearing capacity uniformity and the load transfer capacity of the assembled airport pavement based on the high-speed deflectometer. Comprising the following steps: testing a high-speed deflection basin of each point at the top of a pavement base layer before assembling a pavement surface layer; after the pavement surface layer is assembled, high-speed deflection basins of all points on the top of the pavement surface layer are tested; a high-speed deflection area difference index HDSD is calculated and used for evaluating the bearing capacity uniformity of the fabricated airport pavement; calculating the difference between the high-speed deflection values of the top of the base layer and the top of the surface layer; the high-speed deflection load transfer index HTC is calculated and used for evaluating the load transfer capacity between the adjacent assembly type pavement slabs, and the vacancy that a method for detecting and evaluating the bearing state of the assembly type pavement based on the high-speed laser deflectometer is lacked at present is filled.

Description

Technical Field

[0001] The invention relates to the technical field of airport engineering, and in particular to a method for inspecting and evaluating the bearing state of an assembled airport pavement based on a high-speed deflectometer. Background Art

[0002] The high-speed laser deflectometer is the third-generation deflection detection device after the Beckmann beam and weight-type deflectometer. The weight-type deflectometer currently commonly used in airport pavement deflection detection requires stopping the vehicle for detection point by point, while the high-speed laser deflectometer can continuously detect the surface deflection of the bearing layer at a speed of more than 80km / h, significantly improving efficiency. The distance between adjacent measuring points in continuous detection can reach centimeters, significantly improving coverage.

[0003] High-speed laser deflectometers have been gradually applied to road deflection detection in recent years, but they are still rarely used in the detection and evaluation of airport pavements. The load-bearing state of prefabricated airport pavements is a key factor affecting their performance. The existing method uses a heavy hammer deflectometer to detect the deflection value of each measuring point point by point, and directly evaluates the load-bearing capacity by the deflection value. The larger the deflection value, the worse the load-bearing capacity. This method has low efficiency for point-by-point detection, and is designed for ordinary airport pavements, so it is not suitable for prefabricated airport pavements. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for inspecting and evaluating the bearing state of an assembled airport pavement based on a high-speed deflectometer, comprising the following steps:

[0005] S1. Before assembling the pavement surface, test the high-speed bending sink at each measuring point on the top of the pavement base layer;

[0006] S2. After the pavement surface layer is assembled, the high-speed bending sink basins at each measuring point on the top of the pavement surface layer are tested;

[0007] S3. Calculate the high-speed deflection area difference index HDSD to evaluate the uniformity of the bearing capacity of the prefabricated airport pavement;

[0008] S4. Calculate the difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer;

[0009] S5. Calculate the high-speed bending load transfer index HTC to evaluate the load transfer capacity between adjacent prefabricated road panels.

[0010] The technical solution further defined in the present invention is:

[0011] Further, in step S1, a laser high-speed deflectometer is used to test the high-speed deflection basin of each measuring point on the top of the road surface base before assembly, and the measuring line is arranged on the top of the base along the center line of the adjacent rectangular assembled road panels to be laid, and the measuring points are symmetrical about the joint position between the two road panels to be laid; along the advancing direction of the high-speed laser deflectometer, the measuring point position at which the test starts is the center point of the first board to be passed during the inspection to be laid, and the measuring point position at which the test ends is the center point of the adjacent second board to be passed during the inspection to be laid; there are N measuring points on the top surface of the base in the area where the first road panel is to be laid, and their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the base where the second road panel is to be laid. Their coordinates are recorded as x N+1 , x N+2 , ..., x 2N , that is, the measuring points on the top surface of the base layer in the area where two pavement panels are laid are symmetrical about the joint of the two pavement panels, and the spacing between adjacent measuring points on the same pavement panel is the same.

[0012] As described above, in a method for evaluating the bearing state of an assembled airport pavement based on a high-speed deflectometer, in step S2, a laser high-speed deflectometer is used to test the high-speed deflection basin of each measuring point on the top of the assembled pavement surface layer, and the measuring line is arranged at the top of the surface layer along the center line of the adjacent rectangular assembled pavement panels to be laid, and the measuring points are symmetrical about the joint position between the two pavement panels to be laid; each measuring point on the top of the surface layer is respectively arranged directly above each measuring point on the top of the base layer, so the number and coordinates of the measuring points on the top of the surface layer are consistent with those of the measuring points on the top of the base layer, and there are N measuring points on the top surface of the surface layer in the area where the first pavement panel is to be laid, and their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the surface layer where the second road panel is to be laid. Their coordinates are recorded as x N+1 , x N+2 , ..., x 2N .

[0013] As described above, in a method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, in steps S1 and S2, the high-speed deflection basin measured at each measuring point on the top of the pavement surface layer or base layer is composed of the deflection values ​​measured by j deflection sensors (j=1, 2, ..., M), and the distance between the jth deflection sensor and the first deflection sensor is recorded as k j , where M represents the number of deflection sensors in the high-speed laser deflectometer; during detection, the first deflection sensor is located vertically above the measuring point, and the measuring point is located at x i The deflection value at the top of the base layer measured by the jth deflection sensor is recorded as d b，j (x i ), the deflection value of the top surface layer measured by the jth deflection sensor is recorded as ds，j (x i ).

[0014] As described above, in the method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, step S3 specifically includes the following sub-steps:

[0015] S3.1. Calculate the high-speed deflection area difference HDAD index by the following formula:

[0016]

[0017] Among them, HDAD(x i )(i=1,2,...,2N) represents the coordinate x i The high-speed bending area difference index corresponding to the location, k j+1 represents the distance between the (j+1)th deflection sensor and the first deflection sensor, d s,j (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the jth deflection sensor at time d s,j+1 (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the (j+1)th deflection sensor at time d s,j+1 (x j ) indicates that the measuring point is located at x j The deflection value of the top of the surface layer measured by the (j+1)th deflection sensor at time t;

[0018] S3.2. Calculate the high-speed deflection area difference index HDSD between two adjacent prefabricated pavement surface plates by the following formula:

[0019]

[0020] Among them, d s,1 (x1) represents the deflection value of the top surface layer measured by the first deflection sensor when the measuring point is located at x1, d s，1 (x 2N ) indicates that the measuring point is located at x 2N The deflection value of the top of the surface layer measured by the first deflection sensor; the smaller the high-speed deflection area difference index HDSD is, the better the uniformity of the bearing capacity of the adjacent prefabricated road panels measured is.

[0021] As described above, in the method for evaluating the bearing state of the prefabricated airport pavement based on the high-speed deflectometer, in step S4, the difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer is calculated by the following formula:

[0022] Δd j (x i ) = d b,j (xi )-d s,j (x i )

[0023] Where, Δd j (x i ) indicates that the measuring point is located at x i The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor at time t

[0024] In the aforementioned method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, in step S5, the high-speed deflection load transfer index HTC is calculated by the following formula:

[0025]

[0026] Where, Δd j (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor, Δd j (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor; the smaller the high-speed deflection load transfer index HTC is, the better the load transfer capacity between adjacent prefabricated road panels is.

[0027] As described above, in the method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, in step S5, x A The corresponding measuring point is at the first surface plate that the high-speed laser deflection instrument passes through during the test, and the distance from the joint of the adjacent surface plate is 25 cm; x B The corresponding measuring point is at the second surface plate that the high-speed laser deflection meter passes behind during the test, and the distance from the joint of the adjacent surface plate is 25 cm.

[0028] As described above, in the method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, in steps S1 and S2, the high-speed laser deflectometer has a total of 7 deflection sensors, that is, the value of M is 7.

[0029] As described above, in the method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, in steps S1 and S2, the distance k between the jth deflection sensor and the first deflection sensor is j They are 0m, 0.1m, 0.1m, 0.3m, 0.3m, 0.3m and 0.3m respectively.

[0030] The beneficial effects of the present invention are:

[0031] High-speed laser deflection meters have been gradually used in road deflection detection in recent years, but are still less used in the detection and evaluation of airport pavements; the bearing state of prefabricated airport pavements is a key factor affecting their performance. The existing method uses a heavy hammer deflection meter to detect the deflection value of each measuring point point by point, and directly evaluates the bearing capacity with the deflection value. The larger the deflection value, the worse the bearing capacity. This method has low point-by-point detection efficiency, and is designed for ordinary airport pavements, and is not suitable for prefabricated airport pavements. In the present invention, by testing the deflection of the top surface of the base layer before the assembly of the pavement surface layer plate, and the deflection of the top surface of the surface layer after the assembly of the pavement surface layer plate, the proposed corresponding indicators are calculated to evaluate the uniformity of the bearing capacity of the prefabricated pavement and the load transfer capacity between adjacent pavement surface layers, filling the current lack of methods for detecting and evaluating the bearing state of prefabricated pavements based on high-speed laser deflection meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0033] Figure 2 Schematic diagram of the distribution of each measuring point in an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a vertical cross section at a measuring line in an embodiment of the present invention;

[0035] Figure 4 The coordinates of the measuring point in the embodiment of the present invention are i Schematic diagram of the deflection values ​​measured at each deflection sensor at the time. DETAILED DESCRIPTION

[0036] This embodiment provides a method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, such as Figure 1 As shown, the following steps are included:

[0037] S1. Before assembling the pavement surface layer, test the high-speed deflection basins at each measuring point on the top of the pavement base layer; use a laser high-speed deflection instrument to test the high-speed deflection basins at each measuring point on the top of the pavement base layer before assembly, such as Figures 2 to 3As shown, the measuring line is arranged on the top of the base layer along the center line of the adjacent rectangular prefabricated road panels to be laid, and the measuring points are symmetrical about the joint positions between the two road panels to be laid; along the advancing direction of the high-speed laser deflectometer, the measuring point position for starting the test is the center point of the first panel to be passed during the inspection to be laid, and the measuring point position for ending the test is the center point of the adjacent second panel to be passed during the inspection to be laid.

[0038] There are N measuring points on the top surface of the base where the first road panel is to be laid. Their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the base where the second road panel is to be laid. Their coordinates are recorded as x N+1 , x N+2 , ..., x 2N , that is, the measuring points on the top surface of the base layer in the area where two pavement panels are laid are symmetrical about the joint of the two pavement panels, and the spacing between adjacent measuring points on the same pavement panel is the same.

[0039] S2. After the pavement surface layer is assembled, the high-speed deflection basins of each measuring point on the top of the pavement surface layer are tested; a laser high-speed deflection instrument is used to test the high-speed deflection basins of each measuring point on the top of the pavement surface layer after assembly, and the measuring line is arranged on the top of the surface layer along the center line of the adjacent rectangular assembled pavement panels to be laid, and the measuring points are symmetrical about the joint position between the two pavement panels to be laid; each measuring point on the top of the surface layer is respectively set directly above each measuring point on the top of the base layer, so the number and coordinates of the measuring points on the top of the surface layer are consistent with those of the measuring points on the top of the base layer. There are N measuring points on the top surface of the surface layer in the area where the first pavement panel is to be laid, and their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the surface layer where the second road panel is to be laid. Their coordinates are recorded as x N+1 ,x N+2 ,…,x 2N .

[0040] The high-speed deflection basin measured at each measuring point on the top of the road surface or base layer is composed of the deflection values ​​measured by j deflection sensors (j = 1, 2, ..., M), and the distance between the jth deflection sensor and the first deflection sensor is denoted as k. j , M and k j The value of depends on the hardware design of the high-speed laser deflectometer used. Since the deflection sensors in each high-speed laser deflectometer are set differently, M is the number of deflection sensors in the high-speed laser deflectometer used, and k j The distance between the sensors also depends on the specific configuration of the deflection sensors of the high-speed laser deflectometer used.

[0041] During the test, the first deflection sensor is located vertically above the measuring point. Figure 4As shown, the measuring point is located at x i The deflection value at the top of the base layer measured by the jth deflection sensor is recorded as d b,j (x i ), the deflection value of the top surface layer measured by the jth deflection sensor is recorded as d s,j (x i ).

[0042] S3. Calculate the High-Deflection Square Difference (HDSD) index to evaluate the uniformity of the bearing capacity of the prefabricated airport pavement, which specifically includes the following sub-steps:

[0043] S3.1. Calculate the High-Deflection Area Difference (HDAD) index using the following formula:

[0044]

[0045] Among them, HDAD(x i )(i=1,2,...,2N) represents the coordinate x i The high-speed bending area difference index corresponding to the location, k j+1 represents the distance between the (j+1)th deflection sensor and the first deflection sensor, d s,j (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the jth deflection sensor at time d s,j+1 (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the (j+1)th deflection sensor at time d s,j+1 (x j ) indicates that the measuring point is located at x j The deflection value of the top surface layer measured by the (j+1)th deflection sensor at time .

[0046] S3.2. Calculate the high-speed deflection area difference index HDSD between two adjacent prefabricated pavement surface plates by the following formula:

[0047]

[0048] Among them, d s,1 (x1) represents the deflection value of the top surface layer measured by the first deflection sensor when the measuring point is located at x1, d s,1 (x 2N ) indicates that the measuring point is located at x 2NThe deflection value of the top of the surface layer measured by the first deflection sensor; the smaller the high-speed deflection area difference index HDSD is, the better the uniformity of the bearing capacity of the adjacent prefabricated road panels measured is.

[0049] S4. Calculate the difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer as shown in the following formula:

[0050] Δd j (x i ) = d b,j (x i )-d s,j (x i )

[0051] Where, Δd j (x i ) indicates that the measuring point is located at x i The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor at time t

[0052] S5. Calculate the High-Deflection Transfer Coefficient (HTC) to evaluate the load transfer capacity between adjacent prefabricated road panels, as shown in the following formula:

[0053]

[0054] Where, Δd j (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor, Δd j (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor.

[0055] The smaller the high-speed bending load transfer index HTC is, the better the load transfer capacity between adjacent prefabricated road panels is; A The corresponding measuring point is at the first surface plate that the high-speed laser deflection instrument passes through during the test, and the distance from the joint of the adjacent surface plate is 25 cm; x BThe corresponding measuring point is at the second surface plate that the high-speed laser deflection meter passes behind during the test, and the distance from the joint of the adjacent surface plate is 25 cm.

[0056] The present embodiment provides a method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer, which is applicable to a prefabricated airport pavement whose surface layer is assembled from rectangular pavement panels, wherein the pavement bearing state includes the uniformity of bearing capacity and the load transfer capacity between adjacent prefabricated pavement panels; in a specific implementation, a prefabricated airport pavement, wherein the surface layer is a square cement concrete slab with a side length of 5m and the base layer is cement-stabilized gravel, uses a high-speed laser deflectometer to test the uniformity of bearing capacity of two adjacent pavement panels and the load transfer capacity between the two.

[0057] In the test, the distance between adjacent measuring points is 0.5 m. The high-speed laser deflection instrument used has 7 deflection sensors, that is, M is 7, and the distance k between the jth (j=1, 2, ..., M) deflection sensor and the first deflection sensor is j They are 0m, 0.1m, 0.1m, 0.3m, 0.3m, 0.3m and 0.3m respectively.

[0058] First, before and after the surface layer is assembled, two plates, A and B, are selected for testing. The deflection basins of the top of the base layer and the top of the surface layer measured at each measuring point on the first plate A tested first and the second plate B tested later are shown in Table 1 below, where the deflection unit is 0.01 mm.

[0059] For record keeping, the x on the first board A i (i=1,2,...N) is the distance between the corresponding measuring point and the joint between the two plates, recorded as a negative value; x on the second plate B i (i=N+1,N+2,...2N) is also the distance between the corresponding measuring point and the joint between the two plates, recorded as a positive value; Table 1 includes the deflection values ​​at each measuring point on the top surface of the base layer and the top surface of the surface layer. There are 2 measuring points on the top surface of the base layer, whose coordinates are x5 and x6 respectively; there are 10 measuring points on the top surface of the surface layer, whose coordinates are x1 to x6 respectively. 10 .

[0060] Table 1

[0061]

[0062] According to the formulas in steps S3 to S5, the high-speed deflection area difference index HDSD between the first plate A and the second plate B is 0.181 m, and the high-speed deflection load transfer index HTC is 4.74 (dimensionless).

[0063] Secondly, before and after the surface layer panels are assembled, two panels, C and D, are selected for testing. The deflection basins of the top of the base layer and the top of the surface layer measured at each measuring point on the first panel C tested first and the second panel D tested later are shown in Table 2 below, where the deflection unit is 0.01 mm.

[0064] For record keeping, the x on the first board C i (i=1,2,...N) is the distance between the corresponding measuring point and the joint between the two plates, recorded as a negative value; x on the second plate D i (i=N+1,N+2,...2N) is also the distance between the corresponding measuring point and the joint between the two plates, recorded as a positive value; Table 2 includes the deflection values ​​at each measuring point on the top surface of the base layer and the top surface of the surface layer. There are 2 measuring points on the top surface of the base layer, whose coordinates are x5 and x6 respectively; there are 10 measuring points on the top surface of the surface layer, whose coordinates are x1 to x6 respectively. 10 .

[0065] Table 2

[0066]

[0067] According to the formulas in steps S3 to S5, the high-speed deflection area difference index HDSD between the first plate C and the second plate D is 0.154 m, and the high-speed deflection load transfer index HTC is 3.66 (dimensionless).

[0068] It can be seen that compared with the adjacent prefabricated surface panels A and B, the high-speed deflection area difference index HDSD at the prefabricated surface panels C and D is smaller, indicating that the pavement bearing capacity at the C and D panels is more uniform; the high-speed deflection load transfer index HTC at the C and D panels is also smaller, indicating that the joint load transfer capacity between the C and D panels is better.

[0069] High-speed laser deflection meters have been gradually used in road deflection detection in recent years, but are still less used in the detection and evaluation of airport pavements; the bearing state of prefabricated airport pavements is a key factor affecting their performance. The existing method uses a heavy hammer deflection meter to detect the deflection value of each measuring point point by point, and directly evaluates the bearing capacity with the deflection value. The larger the deflection value, the worse the bearing capacity. This method has low point-by-point detection efficiency, and is designed for ordinary airport pavements, and is not suitable for prefabricated airport pavements. In the present invention, by testing the deflection of the top surface of the base layer before the assembly of the pavement surface layer plate, and the deflection of the top surface of the surface layer after the assembly of the pavement surface layer plate, the proposed corresponding indicators are calculated to evaluate the uniformity of the bearing capacity of the prefabricated pavement and the load transfer capacity between adjacent pavement surface layers, filling the current lack of methods for detecting and evaluating the bearing state of prefabricated pavements based on high-speed laser deflection meters.

[0070] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A method for evaluating the bearing state of an assembled airport pavement based on a high-speed deflectometer, characterized in that: The following steps are involved: S1. Before assembling the pavement surface, test the high-speed bending sink at each measuring point on the top of the pavement base layer; S2. After the pavement surface layer is assembled, the high-speed bending sink basins at each measuring point on the top of the pavement surface layer are tested; S3. Calculate the high-speed deflection area difference index HDSD to evaluate the uniformity of the bearing capacity of the prefabricated airport pavement; S4. Calculate the difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer; S5. Calculate the high-speed bending load transfer index HTC to evaluate the load transfer capacity between adjacent prefabricated road panels.

2. According to claim 1, a method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer is characterized by: In step S1, a laser high-speed deflectometer is used to test the high-speed deflection basin of each measuring point on the top of the road surface base before assembly. The measuring line is arranged on the top of the base along the center line of the adjacent rectangular assembled road panels to be laid, and the measuring points are symmetrical about the joint position between the two road panels to be laid. Along the advancing direction of the high-speed laser deflectometer, the measuring point position at which the test starts is the center point of the first board to be laid during the inspection, and the measuring point position at which the test ends is the center point of the adjacent second board to be laid during the inspection. There are N measuring points on the top surface of the base in the area where the first road panel is to be laid, and their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the base where the second road panel is to be laid. Their coordinates are recorded as x N+1 , x N+2 , ..., x 2N , that is, the measuring points on the top surface of the base layer in the area where two pavement panels are laid are symmetrical about the joint of the two pavement panels, and the spacing between adjacent measuring points on the same pavement panel is the same.

3. The method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 2 is characterized in that: In step S2, a laser high-speed deflection meter is used to test the high-speed deflection basin of each measuring point on the top of the assembled road surface. The measuring line is arranged on the top of the surface layer along the center line of the adjacent rectangular assembled road panels to be laid, and the measuring points are symmetrical about the joint position between the two road panels to be laid. The measuring points on the top of the surface layer are respectively arranged directly above the measuring points on the top of the base layer, so the number and coordinates of the measuring points on the top of the surface layer are consistent with those of the measuring points on the top of the base layer. There are N measuring points on the top surface of the surface layer in the area where the first road panel is to be laid, and their coordinates are recorded as x1, x2, ..., x N There are also N measuring points on the top surface of the surface layer where the second road panel is to be laid. Their coordinates are recorded as x N+1 ,x N+2 ,…,x 2N .

4. The method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 3 is characterized in that: In the steps S1 and S2, the high-speed deflection basin measured at each measuring point on the top of the road surface layer or the base layer is composed of the deflection values ​​measured by j deflection sensors (j=1, 2, ..., M), and the distance between the jth deflection sensor and the first deflection sensor is recorded as k j , where M represents the number of deflection sensors in the high-speed laser deflectometer; during detection, the first deflection sensor is located vertically above the measuring point, and the measuring point is located at x i The deflection value at the top of the base layer measured by the jth deflection sensor is recorded as d b,j (x i ), the deflection value of the top surface layer measured by the jth deflection sensor is recorded as d s，j (x i ).

5. The method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 4 is characterized in that: The step S3 specifically includes the following sub-steps: S3.

1. Calculate the high-speed deflection area difference HDAD index by the following formula: Among them, HDAD(x i )(i=1,2,...,2N) represents the coordinate x i The high-speed bending area difference index corresponding to the location, k j+1 represents the distance between the (j+1)th deflection sensor and the first deflection sensor, d s,j (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the jth deflection sensor at time d s,j+1 (x j+1 ) indicates that the measuring point is located at x j+1 The deflection value of the top surface layer measured by the (j+1)th deflection sensor at time d s,j+1 (x j ) indicates that the measuring point is located at x j The deflection value of the top of the surface layer measured by the (j+1)th deflection sensor at time t; S3.

2. Calculate the high-speed deflection area difference index HDSD between two adjacent prefabricated pavement surface plates by the following formula: Among them, d s，1 (x1) represents the deflection value of the top surface layer measured by the first deflection sensor when the measuring point is located at x1, d s,1 (x 2N ) indicates that the measuring point is located at x 2N The deflection value of the top of the surface layer measured by the first deflection sensor; the smaller the high-speed deflection area difference index HDSD is, the better the uniformity of the bearing capacity of the adjacent prefabricated road panels measured is.

6. The method for inspecting and evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 5 is characterized in that: In step S4, the difference in high-speed deflection value between the top of the base layer and the top of the surface layer is calculated by the following formula: Δd j (x i )=d b,j (x i )-d s,j (x i ) Where, Δd j (x i ) indicates that the measuring point is located at x i The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor at time t 7. The method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 6 is characterized by: In step S5, the high-speed deflection load transfer index HTC is calculated by the following formula: Where, Δd j (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x B ) indicates that the measuring point is located at x B The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor, Δd j (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the jth deflection sensor, Δd j+1 (x A ) indicates that the measuring point is located at x A The difference between the high-speed deflection values ​​at the top of the base layer and the top of the surface layer measured by the (j+1)th deflection sensor; the smaller the high-speed deflection load transfer index HTC is, the better the load transfer capacity between adjacent prefabricated road panels is.

8. The method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 7 is characterized by: In step S5, x A The corresponding measuring point is at the first surface plate that the high-speed laser deflection instrument passes through during the test, and the distance from the joint of the adjacent surface plate is 25 cm; x B The corresponding measuring point is at the second surface plate that the high-speed laser deflection meter passes behind during the test, and the distance from the joint of the adjacent surface plate is 25 cm.

9. The method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 8 is characterized by: In the steps S1 and S2, the high-speed laser deflection instrument has a total of 7 deflection sensors, that is, the value of M is 7.

10. The method for evaluating the bearing state of a prefabricated airport pavement based on a high-speed deflectometer according to claim 9, characterized in that: In the steps S1 and S2, the distance k between the jth deflection sensor and the first deflection sensor is j They are 0m, 0.1m, 0.1m, 0.3m, 0.3m, 0.3m and 0.3m respectively.

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