Construction process pavement material evaluation method and system based on volume-mechanical index cooperation

Abstract

The invention relates to a method and system for evaluating a pavement material in a volume-mechanical index synergistic construction process, and the method comprises the steps: testing an asphalt mixture test piece, and building a reasonable interval database of compactness-torsional shear strength; in the construction process of the asphalt pavement, the actually-measured compactness and the actually-measured torsional shear strength of the asphalt pavement are collected; comparing the actually measured compaction degree with the actually measured torsional shear strength corresponding to the actually measured compaction degree with the reasonable interval database to obtain a collaborative evaluation result; and optimizing the construction process parameters of the construction process based on the collaborative evaluation result. The compaction degree and the torsional shear strength are combined for collaborative evaluation, the limitation of traditional single compaction degree evaluation is broken through, the pavement service performance is remarkably improved, later-stage diseases are reduced, the construction quality qualification rate and the detection efficiency are remarkably improved, and the method is suitable for intelligent construction quality control of the asphalt pavement.

Description

Technical Field

[0001] The present invention belongs to the technical field of asphalt pavement construction quality control, and particularly relates to a method and system for evaluating pavement materials during the construction process with coordinated volume-mechanical indexes. Background Art

[0002] In asphalt pavement construction, compaction quality is one of the key factors determining pavement performance and service life. Volume indexes such as density, degree of compaction, and void ratio have always occupied a core position in the evaluation of compaction quality. At present, the degree of compaction is the most commonly used evaluation index in asphalt pavement construction. However, due to the uneven distribution of aggregates, asphalt, and mineral powder during the compaction process, asphalt mixtures with the same degree of compaction may have significant differences in mechanical properties. Therefore, a single volume index is difficult to comprehensively and accurately reflect the compaction quality of the mixture.

[0003] With the in-depth research on asphalt mixtures from macro, meso, to micro levels, many scholars have proposed new evaluation indexes. Qian et al. established a simulation model of the asphalt mixture compaction process through the discrete element method and proposed microscopic indexes such as the contact unbalanced force of coarse aggregates, the contact points and contact forces between mortar and aggregates. Liu et al. combined the finite element method with the discrete element method and used porosity and apparent density to evaluate compaction quality. Sefidmazgi et al. proposed an internal structure index to evaluate compaction quality by improving two-dimensional image processing technology. Although these microscopic indexes can effectively evaluate the compaction state of the mixture, they are mostly limited to the static evaluation after compaction and cannot evaluate the quality of the compaction process. At the same time, their measurement process is complex and the calculation amount is large, making it difficult to be widely applied in engineering practice.

[0004] Ground-penetrating radar (GPR), as a non-destructive testing technology for pavements, has the advantages of convenient operation, high detection efficiency, and high resolution. Therefore, GPR technology has also been popularized and applied in the evaluation of asphalt pavement quality. Xiong Xuetang et al. established a model of dielectric constant and void ratio to achieve the evaluation of pavement compaction quality. Cui et al. further established a dynamic modulus prediction model using empirical neural networks and artificial neural networks, while Meng et al. established a density prediction model based on the Back Propagation Neural Network (BPNN), reducing the prediction error to 0.184% and greatly improving the evaluation accuracy. Zhang Bei et al. constructed a joint algorithm based on BP-PSO, which greatly improved the calculation efficiency on the premise of ensuring the calculation accuracy. However, the GPR method still essentially focuses on the density evaluation after compaction and is difficult to comprehensively reflect the mechanical properties.

[0005] Most of the evaluation indexes of the existing compaction quality evaluation methods are mainly volume indexes, which are difficult to comprehensively characterize the skeleton structure and mechanical properties of the mixture. In addition, although methods such as numerical simulation, industrial CT, and ground penetrating radar provide new perspectives, they are costly, computationally complex, and lack practicality. At the same time, these evaluation methods are only applicable to the detection and evaluation after opening to traffic, and cannot implement dynamic monitoring and precise control of the construction process. This also leads to the over-pursuit of compaction degree during the asphalt pavement compaction process, resulting in over-compaction in many asphalt pavement constructions after completion. Over-compaction will cause excessive extrusion of the asphalt film and excessive filling of fine aggregates, reducing the interlocking effect between aggregates, thereby affecting the anti-shear performance of the mixture, reducing the anti-fatigue performance, and increasing the risk of low-temperature cracking. Simple volume indexes are difficult to provide a scientific basis for the compaction quality evaluation and control measures of asphalt mixtures. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides an evaluation method and system for pavement materials during the construction process with coordinated volume-mechanical indexes.

[0007] The technical solution adopted by the present invention is as follows: In the first aspect, an evaluation method for pavement materials during the construction process with coordinated volume-mechanical indexes is provided, including: By testing asphalt mixture specimens, a reasonable interval database of compaction degree-torsional shear strength is established; During the construction process of the asphalt pavement, the measured compaction degree and the measured torsional shear strength of the asphalt pavement are collected; The measured torsional shear strength corresponding to the measured compaction degree is compared with the reasonable interval database to obtain a coordinated evaluation result; Based on the coordinated evaluation result, the construction process parameters are optimized.

[0008] Furthermore, by testing asphalt mixture specimens, establishing a reasonable interval database of compaction degree-torsional shear strength includes: In the laboratory, asphalt mixture specimens are formed according to the construction mix ratio, and the test compaction degree C of a preset percentage is controlled to simulate the dense state of different compaction stages; A compaction shear property detection device is used to measure the test torsional shear strength of each group of asphalt mixture specimens at the corresponding test temperature T τ ; By statistically analyzing the test compaction degree C and the test torsional shear strength τ, the reasonable interval expression of the torsional shear strength at each test compaction degree C is determined as: ; Wherein, is the standard value of the test torsional shear strength τ; is the test torsional shear strength τStandard deviation; test torsional shear strength τ Coefficient of variation ; Establish a reasonable interval database for compaction degree - torsional shear strength according to the reasonable interval expression.

[0009] Furthermore, compare the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result, including: The measured compaction degree Corresponding to the measured torsional shear strength Is compared with the reasonable interval database; When Corresponding When the torsional shear strength corresponding to the compaction degree is within the reasonable interval, the collaborative evaluation result is qualified; When Corresponding When the torsional shear strength corresponding to the compaction degree exceeds the reasonable interval, the collaborative evaluation result is overpressure, and the Is ; When Corresponding When the torsional shear strength corresponding to the compaction degree is lower than the reasonable interval, the collaborative evaluation result is underpressure, and the Is .

[0010] Furthermore, optimize the construction process parameters of the construction process based on the collaborative evaluation result, including: When the collaborative evaluation result is underpressure or overpressure, calculate the rolling speed adjustment amount And the vibration frequency adjustment amount ; k And m Are preset adjustment coefficients; Is the torsional shear strength corresponding to each compaction degree on the standard curve of compaction degree - torsional shear strength in the reasonable interval database; Through the rolling speed adjustment amount And the vibration frequency adjustment amount Adjust the rolling speed and vibration frequency during the construction process.

[0011] Furthermore, during the construction process of the asphalt pavement, collect the measured compaction degree and measured torsional shear strength of the asphalt pavement, including: During the construction process of the asphalt pavement, obtain the measured compaction degree of the asphalt pavement during the construction process in real time through a nuclear-free density meter; and measure the measured torsional shear strength and measured temperature of the asphalt pavement through a compaction shear property detection device.

[0012] Secondly, a volume-mechanical index coordinated construction process pavement material evaluation system is provided, including: A reasonable interval database establishment module is used to establish a reasonable interval database of compaction degree-torsion shear strength by testing asphalt mixture specimens; The data acquisition module is used to collect the measured compaction degree and measured torsional shear strength of the asphalt pavement during the construction process of the asphalt pavement; The volume-mechanics dual-index collaborative evaluation module is used to compare the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain the collaborative evaluation results; The optimization module is used to optimize the construction process parameters of the construction process based on the collaborative evaluation results.

[0013] Furthermore, the reasonable interval database establishment module and the reasonable interval data map are specifically used to form asphalt mixture specimens according to the construction mix ratio in the laboratory, control the preset percentage of the test compaction degree C to simulate the compaction state at different rolling stages; use the compaction shear characteristic detection device to measure the test torsional shear strength of each group of asphalt mixture specimens at the corresponding test temperature T τ ; Through statistical test compaction C and test torsional shear strength τ , the reasonable range expression of torsional shear strength under each test compaction degree C is determined as: ; in, is the standard value for testing the torsional shear strength τ; is the standard deviation of the torsional shear strength τ; τ The coefficient of variation ; According to the reasonable interval expression, a reasonable interval database of compaction degree-torsion shear strength is established, and a reasonable interval data graph is formed.

[0014] Furthermore, the volume-mechanics dual index collaborative evaluation module is specifically used to convert the measured compaction degree Corresponding to the measured torsional shear strength Compared with the reasonable interval database; when Corresponding When , that is, when the torsional shear strength corresponding to the compaction degree is within a reasonable range, the collaborative evaluation result is qualified; when Corresponding When the torsional shear strength corresponding to the compaction degree exceeds the reasonable range, the collaborative evaluation result is overpressure. for ;when Corresponding When the torsional shear strength corresponding to the compaction degree is lower than the reasonable range, the obtained collaborative evaluation result is under-compaction. The is .

[0015] Furthermore, the optimization module is specifically configured to calculate the rolling speed adjustment amount and the vibration frequency adjustment amount when the collaborative evaluation result is under-compaction or over-compaction; k and m are preset adjustment coefficients; is the torsional shear strength corresponding to each compaction degree on the standard curve of compaction degree - torsional shear strength in the reasonable range database; the rolling speed and vibration frequency during the construction process are adjusted through the rolling speed adjustment amount and the vibration frequency adjustment amount .

[0016] Furthermore, the data acquisition module is specifically configured to, during the construction process of the asphalt pavement, obtain the measured compaction degree of the asphalt pavement in real time through a nuclear-free densitometer; and measure the measured torsional shear strength and the measured temperature of the asphalt pavement through a compaction shear property detection device.

[0017] The beneficial effects achieved by the present invention: By testing asphalt mixture specimens, a reasonable range database of compaction degree - torsional shear strength is established; during the construction process of the asphalt pavement, the measured compaction degree and the measured torsional shear strength of the asphalt pavement are collected; the measured torsional shear strength corresponding to the measured compaction degree is compared with the reasonable range database to obtain a collaborative evaluation result; based on the collaborative evaluation result, the construction process parameters are optimized. Combining the compaction degree and the torsional shear strength for collaborative evaluation breaks through the limitation of traditional single compaction degree evaluation, significantly improves the pavement service performance, reduces late-stage diseases, significantly improves the construction quality qualification rate and detection efficiency, and is applicable to intelligent construction quality control of asphalt pavements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flowchart of the pavement material evaluation method for volume - mechanical index collaboration during the construction process of the present invention; Figure 2 is a structural diagram of the pavement material evaluation system for volume - mechanical index collaboration during the construction process of the present invention; Figure 3 is a schematic diagram of the reasonable range database of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] As Figure 1 shown, an evaluation method for pavement materials during the construction process with coordinated volume-mechanical indexes provided by an embodiment of the present invention includes: 101. By testing asphalt mixture specimens, establish a reasonable interval database for compaction degree-torsional shear strength; In this embodiment, asphalt mixture specimens are formed in the laboratory according to the construction mix ratio, and the test compaction degree C of a preset percentage is controlled to simulate the dense state at different compaction stages; the preset percentages are 90%, 92%, 94%, 96%, 98% and 99% respectively; Use a compaction shear property detection device to measure the test torsional shear strength of each group of asphalt mixture specimens at the corresponding test temperature T τ ; in addition, a rutting test needs to be carried out synchronously to obtain the dynamic stability (Dynamic Stability, DS), and a soaking rutting test is carried out to obtain the dynamic stability ratio DSR; By statistically analyzing the test compaction degree C and the test torsional shear strength τ , determine that the reasonable interval expression of the torsional shear strength at each test compaction degree C is: ; Wherein, is the standard value of the test torsional shear strength τ; is the standard deviation of the test torsional shear strength τ; the coefficient of variation of the test torsional shear strength τ ; Establish a reasonable interval database for compaction degree-torsional shear strength according to the reasonable interval expression. As Figure 3 shown, the reasonable interval database has a compaction degree-torsional shear strength standard curve, and the colored areas on both sides of the standard curve are the reasonable intervals; In addition, it is also possible to establish C , τ , T and the mapping relationship database with pavement performance ( DS , DSR ).

[0021] 102. During the construction process of the asphalt pavement, collect the measured compaction degree and the measured torsional shear strength of the asphalt pavement; In this embodiment, during the construction process of the asphalt pavement, the measured compaction degree of the asphalt pavement during the construction process is obtained in real time through a nuclear-free density meter ; and measure the measured torsional shear strength of the asphalt pavement in real time through the compaction shear property detection device and the measured temperature .

[0022] 103. Compare the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result; In this embodiment, the measured compaction degree corresponding to the measured torsional shear strength is compared with the reasonable interval database; When the corresponding is such that the torsional shear strength corresponding to the compaction degree is within the reasonable interval, the collaborative evaluation result is obtained as qualified; When the corresponding is such that the torsional shear strength corresponding to the compaction degree exceeds the reasonable interval, the collaborative evaluation result is obtained as over-compacted, which is ; When the corresponding is such that the torsional shear strength corresponding to the compaction degree is lower than the reasonable interval, the collaborative evaluation result is obtained as under-compacted, which is ;.

[0023] It should be noted that since step 102 also describes the establishment of C , τ , T and the mapping relationship database with the road performance ( DS , DSR ), then based on , and , the corresponding DS and DSR can be found through the mapping relationship database, so as to understand the current road performance.

[0024] 104. Optimize the construction process parameters during construction based on the collaborative evaluation result.

[0025] In this embodiment, when the collaborative evaluation result is under-compacted or over-compacted, calculate the rolling speed adjustment amount and the vibration frequency adjustment amount ; k and m are preset adjustment coefficients; is the torsional shear strength corresponding to each compaction degree on the compaction degree - torsional shear strength standard curve in the reasonable interval database; Through the rolling speed adjustment amount and the vibration frequency adjustment amount Adjust the rolling speed and vibration frequency during the construction process to obtain ; It should be noted that for the overpressure situation, in addition to adjusting the rolling speed and vibration frequency, it is also necessary to spray emulsified asphalt for repair.

[0026] According to the above Figure 1 description of the embodiments shown, after optimizing the construction process parameters of the construction process, the construction continues. When performing the final compaction stage of the asphalt, it is also possible to follow the principle of giving priority to mechanical properties. If , the compaction degree can be allowed to be relaxed to 95.5% - 97.0%, where is the median value of the reasonable range of the torsional shear strength; in the final compaction stage, by moderately reducing the compaction degree and fully considering the mechanical properties, the service performance of the asphalt pavement can be effectively improved, and at the same time, the aggregate crushing caused by overcompaction can be avoided.

[0027] It should be noted that for each percentage of compaction degree in step 101, 4 different rutting plate specimens are selected for shear property tests; in order to ensure the accurate mapping relationship and fluctuation range between the torsional shear strength, dynamic stability, and dynamic stability ratio, the data of each group of torsional shear strength, dynamic stability, and dynamic stability are from the same rutting plate specimen.

[0028] It should be noted that for the measurement data of the compaction degree and the corresponding torsional shear strength in the dual-index real-time synchronous acquisition in step 102, they should be from the same measurement area.

[0029] The beneficial effects achieved by the embodiments of the present invention: By testing asphalt mixture specimens, a reasonable range database of compaction degree - torsional shear strength is established; during the construction process of the asphalt pavement, the measured compaction degree and measured torsional shear strength of the asphalt pavement are collected; the measured compaction degree corresponding to the measured torsional shear strength is compared with the reasonable range database to obtain a collaborative evaluation result; based on the collaborative evaluation result, the construction process parameters of the construction process are optimized. Combining the compaction degree and the torsional shear strength for collaborative evaluation breaks through the limitation of traditional single compaction degree evaluation, significantly improves the service performance of the road surface, reduces late-stage diseases, and significantly improves the construction quality qualification rate and detection efficiency, and is applicable to the intelligent construction quality control of asphalt pavements; Introduce the mechanical index of torsional shear strength, and construct an evaluation method for the construction quality of asphalt pavement that coordinates the volume-mechanical double index, so as to improve the scientificity and accuracy of the compaction quality evaluation of asphalt pavement; traditional methods mainly rely on the volume parameter of compaction degree to judge the density of the mixture, but it is difficult to reflect its internal skeleton structure and mechanical properties. Especially in the case of over-compaction or under-compaction, it is difficult to accurately identify construction quality problems; it can not only evaluate the density of the mixture, but also monitor the skeleton stability and cohesion in real time to ensure that the compacted asphalt pavement is in the best state; compared with the single volume index, this method is more scientific and reasonable, provides accurate and reliable basis for compaction quality control, and ensures that the asphalt pavement has excellent durability and anti-deformation ability; By synchronously measuring the compaction degree and torsional shear strength, realize the real-time compaction quality monitoring during the construction process, and extend the construction quality evaluation from the traditional post-construction inspection to the accurate evaluation of the whole construction process; the traditional inspection method lags behind the construction process, and the construction unit can often obtain the inspection results only after the compaction is completed. If quality problems are found, it is difficult to remedy; the present invention breaks through this limitation, and through the coordinated evaluation of the double index, synchronously collects the compaction degree and torsional shear strength of the mixture during the construction process, and evaluates the compaction state in real time; provides reliable construction quality monitoring data, provides a scientific basis for the optimization of construction parameters and quality control, ensures that the construction quality meets the specification requirements, and effectively improves the long-term performance of the asphalt pavement; The present invention not only realizes the quality monitoring during the construction process, but also dynamically optimizes the construction process based on the real-time monitoring data, so as to realize the whole-process quality control; the existing compaction quality evaluation methods (such as compaction degree detection, ground penetrating radar (GPR), falling weight deflectometer (FWD) and core sampling detection) all belong to post-construction inspection and cannot adjust the construction parameters in real time, resulting in difficulty in timely identifying and optimizing the compaction process during the construction process; the present invention adopts a volume-mechanical double-index coordinated evaluation method, synchronously monitors the compaction degree and torsional shear strength of the mixture during the construction process, and combines the reasonable interval database of compaction degree - torsional shear strength established before construction and the corresponding evaluation rules to accurately identify quality problems and dynamically optimize key construction parameters such as the number of compaction passes, vibration frequency and compaction speed; this method ensures the stability of construction quality, avoids quality defects caused by improper construction parameters, and thus improves the long-term performance and durability of asphalt pavement; The torsional shear strength is introduced as a mechanical index to construct a dual-index collaborative evaluation method of volume-mechanics, improving the scientificity, accuracy, and engineering applicability of the evaluation of construction compaction quality. Based on the existing non-destructive compaction degree detection process, the measurement of torsional shear strength is added, enabling the construction unit to accurately judge the compaction state of the asphalt pavement based on the dual-index collaborative analysis and dynamically optimize the construction process accordingly, including adjusting key parameters such as the number of rolling passes, vibration frequency, and rolling speed. Compared with the traditional method that only relies on volume indicators, this method not only improves the evaluation accuracy of compaction quality but also realizes real-time feedback and dynamic control during the construction process, enhancing the pertinence and operability of construction guidance. Through the collaborative control of volume-mechanics dual indicators, the present invention constructs a more accurate and efficient construction quality evaluation system, which further improves its engineering applicability while maintaining the continuity of the traditional method and has broad promotion value.

[0030] Combined with the evaluation method of pavement materials during the construction process with the collaboration of volume-mechanics indicators described in the above embodiments, the evaluation system of pavement materials during the construction process with the collaboration of volume-mechanics indicators will be described below through embodiments.

[0031] As Figure 2 shown, the embodiment of the present invention provides an evaluation system of pavement materials during the construction process with the collaboration of volume-mechanics indicators, including: A reasonable interval database establishment module 201 for establishing a reasonable interval database of compaction degree - torsional shear strength by testing asphalt mixture specimens. A data acquisition module 202 for collecting the measured compaction degree and measured torsional shear strength of the asphalt pavement during the construction process. A volume-mechanics dual-index collaborative evaluation module 203 for comparing the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result. An optimization module 204 for optimizing the construction process parameters during the construction process based on the collaborative evaluation result.

[0032] Combined with Figure 2 the embodiment shown, preferably, in some embodiments of the present invention, The reasonable interval database establishment module 201 is specifically used for forming asphalt mixture specimens in the laboratory according to the construction mix ratio, controlling the preset percentage of test compaction degree C to simulate the compacted state of different rolling stages; using a compaction shear property detection device to measure the test torsional shear strength of each group of asphalt mixture specimens at the corresponding test temperature T ; by statistically analyzing the test compaction degree τ and the test torsional shear strength C and the test torsional shear strength τ, the reasonable interval expression for the torsional shear strength at each test compaction degree C is determined as: ; Among them, is the standard value of the test torsional shear strength τ; is the standard deviation of the test torsional shear strength τ ; the coefficient of variation of the test torsional shear strength τ is ; a reasonable interval database of compaction degree - torsional shear strength is established according to the reasonable interval expression.

[0033] Combined with Figure 2 shown in the embodiments, preferably, in some embodiments of the present invention, The volume - mechanical double - index collaborative evaluation module 203 is specifically used to compare the measured compaction degree with the corresponding measured torsional shear strength with the reasonable interval database; when the corresponding is satisfied, that is, when the torsional shear strength corresponding to the compaction degree is within the qualified interval, the collaborative evaluation result is qualified; when the corresponding is satisfied, that is, when the torsional shear strength corresponding to the compaction degree exceeds the qualified interval, the collaborative evaluation result is over - compaction, is ; when the corresponding is satisfied, that is, when the torsional shear strength corresponding to the compaction degree is lower than the qualified interval, the collaborative evaluation result is under - compaction, is .

[0034] Combined with Figure 2 shown in the embodiments, preferably, in some embodiments of the present invention, The optimization module 204 is specifically used to calculate the rolling speed adjustment amount and the vibration frequency adjustment amount when the collaborative evaluation result is under - compaction or over - compaction; k and m are preset adjustment coefficients; is the torsional shear strength corresponding to each compaction degree on the compaction degree - torsional shear strength standard curve in the reasonable interval database; the rolling speed and vibration frequency during the construction process are adjusted through the rolling speed adjustment amount and the vibration frequency adjustment amount .

[0035] Combined with Figure 2 shown in the embodiments, preferably, in some embodiments of the present invention, The data acquisition module 202 is specifically configured to, during the construction process of the asphalt pavement, obtain the measured compaction degree of the asphalt pavement in real time through a nuclear-free densitometer; and measure the measured torsional shear strength and the measured temperature of the asphalt pavement through a compaction shear property detection device.

[0036] The beneficial effects achieved by the present invention: The reasonable interval database establishment module 201 establishes a reasonable interval database of compaction degree - torsional shear strength by testing asphalt mixture specimens; the data acquisition module 202 acquires the measured compaction degree and the measured torsional shear strength of the asphalt pavement during the construction process of the asphalt pavement; the volume - mechanical double-index collaborative evaluation module 203 compares the measured torsional shear strength corresponding to the measured compaction degree with the reasonable interval database to obtain a collaborative evaluation result; the optimization module 204 optimizes the construction process parameters of the construction process based on the collaborative evaluation result. By combining the compaction degree and the torsional shear strength for collaborative evaluation, it breaks through the limitation of traditional single compaction degree evaluation, significantly improves the pavement service performance, reduces late-stage diseases, significantly improves the construction quality qualification rate and the detection efficiency, and is applicable to the intelligent construction quality control of asphalt pavements.

[0037] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can be implemented in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0038] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0039] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions in the processFigure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks

[0040] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 the steps of the functions specified in one block or multiple blocks

[0041] The above are only embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval of the application

Claims

1. A method for evaluating pavement materials during construction by using volumetric and mechanical index synergy, characterized in that: include: By testing asphalt mixture specimens, a reasonable interval database of compaction degree-torsion shear strength is established; During the construction of the asphalt pavement, the measured compaction and measured torsional shear strength of the asphalt pavement are collected; Compare the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result; Optimizing the construction process parameters of the construction process based on the collaborative evaluation results; The method of testing asphalt mixture specimens to establish a reasonable interval database of compaction degree-torsion shear strength includes: In the laboratory, asphalt mixture specimens are formed according to the construction mix ratio, and the test compaction degree C is controlled to a preset percentage to simulate the compaction state at different rolling stages; Using a compaction shear property detection device to measure the test torsional shear strength τ of each group of asphalt mixture specimens at the corresponding test temperature T; By counting the test compaction degree C and the test torsional shear strength τ, the reasonable interval expression of the torsional shear strength under each test compaction degree C is determined as follows: ； Among them, the is the standard value of the torsional shear strength τ of the test; is the standard deviation of the torsional shear strength τ tested; the coefficient of variation of the torsional shear strength τ tested ; A reasonable interval database of compaction degree-torsion shear strength is established according to the reasonable interval expression.

2. The method for evaluating pavement materials during construction based on volume-mechanical index synergy according to claim 1, characterized in that: The step of comparing the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result includes: The measured compaction Corresponding to the measured torsional shear strength comparing with the reasonable interval database; When the The corresponding When the collaborative evaluation result is qualified; When the The corresponding When the collaborative evaluation result is overvoltage, the for ; When the The corresponding When the collaborative evaluation result is undervoltage, the for .

3. The method for evaluating pavement materials during construction based on volume-mechanical index synergy according to claim 2 is characterized in that: The optimizing of the construction process parameters of the construction process based on the collaborative evaluation result includes: When the collaborative evaluation result is underpressure or overpressure, the rolling speed adjustment amount is calculated. And the vibration frequency adjustment ; The k and m are preset adjustment coefficients; The torsional shear strength corresponding to each compaction degree on the standard curve of compaction degree-torsion shear strength in the reasonable interval database; By adjusting the rolling speed and the vibration frequency adjustment amount The rolling speed and vibration frequency during the construction process are adjusted.

4. The method for evaluating pavement materials during construction based on volume-mechanical index coordination according to claim 1, characterized in that: During the construction of the asphalt pavement, the measured compaction degree and the measured torsional shear strength of the asphalt pavement are collected, including: During the construction of the asphalt pavement, the measured compaction degree of the asphalt pavement during the construction process is obtained in real time by a non-nuclear density meter; and the measured torsional shear strength and the measured temperature of the asphalt pavement are measured by a compaction shear characteristic detection device.

5. A volume-mechanical index coordinated construction process pavement material evaluation system, characterized in that: include: A reasonable interval database establishment module is used to establish a reasonable interval database of compaction degree-torsion shear strength by testing asphalt mixture specimens; The data acquisition module is used to collect the measured compaction degree and measured torsional shear strength of the asphalt pavement during the construction process of the asphalt pavement; A volume-mechanics dual-index collaborative evaluation module, used to compare the measured compaction degree corresponding to the measured torsional shear strength with the reasonable interval database to obtain a collaborative evaluation result; An optimization module, used to optimize the construction process parameters of the construction process based on the collaborative evaluation results; The reasonable interval database establishment module is specifically used to form asphalt mixture specimens according to the construction mix ratio in the laboratory, control the preset percentage of the test compaction degree C to simulate the compaction state at different rolling stages; use the compaction shear characteristic detection device to measure the test torsional shear strength τ of each group of asphalt mixture specimens at the corresponding test temperature T; by counting the test compaction degree C and the test torsional shear strength τ, determine the reasonable interval expression of torsional shear strength under each test compaction degree C as follows: ； Among them, the is the standard value of the torsional shear strength τ of the test; is the standard deviation of the torsional shear strength τ tested; the coefficient of variation of the torsional shear strength τ tested ; Establish a reasonable interval database of compaction degree-torsion shear strength based on the reasonable interval expression.

6. The construction process pavement material evaluation system based on volume-mechanical index coordination according to claim 5 is characterized in that: The volume-mechanics dual index collaborative evaluation module is specifically used to convert the measured compaction degree Corresponding to the measured torsional shear strength Compared with the reasonable interval database; when the The corresponding When the collaborative evaluation result is qualified; when The corresponding When the collaborative evaluation result is overvoltage, the for ; When the The corresponding When the collaborative evaluation result is undervoltage, the for .

7. The construction process pavement material evaluation system based on volume-mechanical index coordination according to claim 6 is characterized in that: The optimization module is specifically used to calculate the rolling speed adjustment value when the collaborative evaluation result is underpressure or overpressure. And the vibration frequency adjustment ; The k and m are preset adjustment coefficients; is the torsional shear strength corresponding to each compaction degree on the standard curve of compaction degree-torsion shear strength in the reasonable interval database; and the vibration frequency adjustment amount The rolling speed and vibration frequency during the construction process are adjusted.

8. The construction process pavement material evaluation system based on volume-mechanical index coordination according to claim 5 is characterized in that: The acquisition module is specifically used to obtain the actual compaction degree of the asphalt pavement in real time during the construction of the asphalt pavement through a non-nuclear density meter; and to measure the actual torsional shear strength and the actual temperature of the asphalt pavement through a compaction shear characteristic detection device.

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