CN107330135B - Method for assisting pavement surface structure design by applying 3D printing technology - Google Patents
Method for assisting pavement surface structure design by applying 3D printing technology Download PDFInfo
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- CN107330135B CN107330135B CN201710320940.2A CN201710320940A CN107330135B CN 107330135 B CN107330135 B CN 107330135B CN 201710320940 A CN201710320940 A CN 201710320940A CN 107330135 B CN107330135 B CN 107330135B
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- test
- test piece
- surface structure
- aggregate
- pavement
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention discloses a method for assisting the design of a pavement surface structure by applying a 3D printing technology, which comprises the following steps: (1) selecting aggregates meeting the technical requirements of the surface layer of the asphalt pavement according to the surface structure design research needs; (2) determining the type of the mixture and the aggregate grading range; (3) generating a large batch of virtual test pieces; (4) evaluating the surface profile characteristics of the virtual test piece; (5) copying and customizing a test piece according to the model through a 3D printer; (6) testing the skid resistance and the noise of the test piece through an accelerated loading simulation test; (7) obtaining the optimal mixing ratio meeting the requirement of the surface structure of the pavement; (8) and tracking and detecting the anti-skid and noise level of the road surface of the test section, and performing engineering evaluation. The invention can save a large amount of manpower and material resources and time required by indoor and outdoor tests, can copy and print test pieces with specific surface contour characteristics for test design, enables the optimization design of the pavement surface structure to be possible, and has remarkable technical, economic and social benefits.
Description
Technical Field
The invention relates to a method for assisting the design of a pavement surface structure by applying a 3D printing technology, and belongs to the field of road structure design.
Background
The surface function of a road surface depends to a large extent on the surface structure of the road surface, and directly influences the driving safety and comfort of the road surface, such as skid resistance, noise and the like. Therefore, it is very important to design a suitable road surface configuration. Due to the lack of necessary means and methods, the conventional road surface is not specially designed for the surface structure, but only provides simple restrictive indexes for the surface skid resistance and the structure depth according to experience. The design process can not meet the requirements of modern roads on safety, rapidness, comfort and environmental protection of the road surface.
The existing research indicates that the mechanism of the road surface skid resistance and the noise is very complex, the influence factors are not only the size of the construction depth, and the distribution and the change of the construction depth have important influence on the skid resistance and the noise of the road surface. However, it is quite difficult to realize road surface skid resistance and noise simulation tests under simple working conditions and controllable conditions by only relying on indoor molded test pieces or actual road surface sampling, and even more, the optimal design of the road surface structure is not developed. Therefore, the invention provides a method for assisting the design of a pavement surface structure by applying a 3D printing technology. The method can save a large amount of manpower and material resources and time required by indoor and outdoor tests, can copy and print test pieces with specific surface contour characteristics for test design, and enables the optimal design of the pavement surface structure to be possible.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a method for assisting the design of a pavement surface structure by applying a 3D printing technology.
The technical scheme of the invention is as follows:
a method for assisting the design of a pavement surface structure by applying a 3D printing technology comprises the following steps:
(1) according to the requirement of surface structure design research, evaluating the quality technical index of aggregate through an aggregate test, and selecting the aggregate meeting the technical requirement of the asphalt pavement surface layer;
(2) determining the type of the mixture and the aggregate grading range;
(3) adopting a Monte Carlo algorithm, and generating a large batch of virtual test pieces by using particle flow software in a mixture grading range;
(4) evaluating the surface profile characteristics of the virtual test piece;
(5) selecting a plurality of virtual test piece models with representative contour characteristics, inputting the test piece models into a 3D printer, selecting appropriate printing materials, loading the printing materials into a 3D printing head, and copying and customizing the test pieces according to the models;
(6) testing the anti-sliding and noise of the test piece and the change of the anti-sliding and noise level along with the load action times through an accelerated loading simulation test;
(7) screening out test pieces meeting the requirements of road surface skid resistance and noise structure by analyzing accelerated loading test data, and obtaining the optimal mixing ratio meeting the requirements of road surface structure;
(8) and (3) carrying out test section engineering according to the optimal mixing ratio of the test piece mixture, tracking and detecting the anti-slip and noise level of the test section pavement, and carrying out engineering evaluation.
Further, in the step (1), the aggregate is subjected to screening, crushing value and particle angular aggregate tests to evaluate the quality technical indexes of the aggregate.
Further, in the step (1), the mixture type comprises AC, SMA and OGFC.
Further, in the step (4), the surface contour characteristics of the virtual test piece are evaluated by adopting a power spectral density or fractal theory method.
Further, in the step (5), the suitable printing material is a material with the same or similar type with the mechanical property of the asphalt mixture.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, a Monte Carlo algorithm is adopted, and a large number of virtual test pieces are generated by using particle flow software in the grading range of the selected mixture type, so that the huge workload for preparing a solid test piece can be reduced, and the working efficiency is improved;
2. 3, printing a test piece according to the virtual test piece model, realizing a road surface anti-skid and noise simulation test with simple working conditions and controllable conditions, and optimizing the road surface structure design;
3. the invention adopts the 3D printing technology to customize the test piece, ensures the identity of the surface structures of the physical test piece and the virtual test piece model with representative contour characteristics, and can truly test the anti-slip and noise level of the corresponding virtual test piece surface contour characteristics.
4. The invention provides a method for assisting the design of a pavement surface structure by applying a 3D printing technology, and obtains a surface structure design index meeting the requirements of pavement skid resistance and noise, thereby reducing the pavement noise from the design and improving the driving comfort.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of three asphalt mix types and their corresponding aggregate gradation ranges.
FIG. 3 is a three-dimensional reconstruction diagram of a bituminous mixture test piece.
Fig. 4 is a schematic diagram of a 3D printed test piece.
Fig. 5 is a schematic diagram of an accelerated loading test of a 3D printing test piece.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto, and may be carried out with reference to conventional techniques for process parameters not particularly noted.
As shown in fig. 1, a method for assisting the design of a pavement surface structure by applying a 3D printing technology includes the following steps:
(1) according to the requirements of surface structure design research, evaluating the quality technical indexes of aggregates by aggregate tests such as screening, crushing value, particle angularity and the like, and selecting the aggregates meeting the technical requirements of asphalt pavement surface layers;
(2) determining a mixture type and an aggregate grading range, wherein the mixture type comprises AC (suspension compact type), SMA (framework compact type), OGFC (framework gap type) and grading curve ranges corresponding to typical grading AC-13 type, SMA-13 type and OGFC-13 type as shown in figure 2;
(3) as shown in fig. 3, a Monte Carlo algorithm is adopted, and a large number of virtual test pieces (AC-13 type, SMA-13 type and OGFC-13 type) are generated by using particle flow software in a mixture grading range;
(4) evaluating the surface contour characteristics of the virtual test piece by adopting a power spectral density or fractal theory method;
(5) selecting a plurality of virtual test piece models with representative contour characteristics, inputting the test piece models into a 3D printer, selecting appropriate printing materials, loading the printing materials into a 3D printing head, copying and customizing a test piece (see figure 4) according to the models, wherein the test piece models with representative surface contour characteristics are particularly test piece models with rich surface contour, uniform aggregate, higher fractal dimension or larger surface roughness, and the appropriate printing materials are materials with the same or similar types as the mechanical properties of the asphalt mixture;
(6) the anti-sliding and noise of the test piece and the change of the anti-sliding and noise level along with the frequency of the load action are tested by an accelerated loading simulation test (see figure 5);
(7) screening out test pieces meeting the requirements of road surface skid resistance and noise structure by analyzing accelerated loading test data, and obtaining the optimal mixing ratio meeting the requirements of road surface structure;
(8) and (3) carrying out test section engineering according to the optimal mixing ratio of the test piece mixture, tracking and detecting the anti-slip and noise level of the test section pavement, and carrying out engineering evaluation.
The invention can save a large amount of manpower and material resources and time required by indoor and outdoor tests, can copy and print test pieces with specific surface contour characteristics for test design, can make optimal design of the surface structure of the road surface possible, can be used for auxiliary design of road surfaces of various grades of roads and urban roads, and has remarkable technical, economic and social benefits.
The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations will be apparent to persons skilled in the art upon consideration of the foregoing description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (4)
1. A method for assisting the design of a pavement surface structure by applying a 3D printing technology is characterized by comprising the following steps:
(1) according to the requirement of surface structure design research, evaluating the quality technical index of aggregate through an aggregate test, and selecting the aggregate meeting the technical requirement of the asphalt pavement surface layer;
(2) determining the type of the mixture and the aggregate grading range;
(3) adopting a Monte Carlo algorithm, and generating a large batch of virtual test pieces by using particle flow software in a mixture grading range;
(4) evaluating the surface profile characteristics of the virtual test piece: evaluating the surface contour characteristics of the virtual test piece by adopting a power spectral density or fractal theory method;
(5) selecting a virtual test piece model with representative contour characteristics, inputting the test piece model into a 3D printer, selecting a proper printing material, loading the printing material into a 3D printing head, and copying and customizing a test piece according to the model;
(6) testing the anti-sliding and noise of the test piece and the change of the anti-sliding and noise level along with the load action times through an accelerated loading simulation test;
(7) screening out test pieces meeting the requirements of road surface skid resistance and noise structure by analyzing accelerated loading test data, and obtaining the optimal mixing ratio meeting the requirements of road surface structure;
(8) and (3) carrying out test section engineering according to the optimal mixing ratio of the test piece mixture, tracking and detecting the anti-slip and noise level of the test section pavement, and carrying out engineering evaluation.
2. The method of claim 1, wherein: in the step (1), the aggregate is subjected to screening, crushing value and particle corner property aggregate tests to evaluate the quality technical indexes of the aggregate.
3. The method of claim 1, wherein in step (1), the mix type comprises AC, SMA, OGFC.
4. The method according to claim 1, wherein in step (5), the suitable printing material is a material of the same or similar type as the mechanical properties of the asphalt mixture.
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| CN107330135B true CN107330135B (en) | 2020-09-22 |
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| CN105908609A (en) * | 2016-04-21 | 2016-08-31 | 东南大学 | Pavement 3D printing device and application thereof |
| CN106710434A (en) * | 2017-02-28 | 2017-05-24 | 山东大学 | 3D printed water-permeable pavement scale simulation device and method under action of runoff |
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| CN105908609A (en) * | 2016-04-21 | 2016-08-31 | 东南大学 | Pavement 3D printing device and application thereof |
| CN106710434A (en) * | 2017-02-28 | 2017-05-24 | 山东大学 | 3D printed water-permeable pavement scale simulation device and method under action of runoff |
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