CN102505599A - Pavement designing method for guaranteeing service life of heavy-duty traffic asphalt pavement - Google Patents
Pavement designing method for guaranteeing service life of heavy-duty traffic asphalt pavement Download PDFInfo
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- CN102505599A CN102505599A CN2011102993299A CN201110299329A CN102505599A CN 102505599 A CN102505599 A CN 102505599A CN 2011102993299 A CN2011102993299 A CN 2011102993299A CN 201110299329 A CN201110299329 A CN 201110299329A CN 102505599 A CN102505599 A CN 102505599A
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Abstract
The invention discloses a pavement designing method for guaranteeing the service life of a heavy-duty traffic asphalt pavement, comprising the following steps of: carrying out performance analysis and test on the asphalt pavement under different load conditions to obtain the stress, deformation and the fatigue characteristics of the material of the asphalt pavement; selecting design parameters of the asphalt pavement under the different load conditions; analyzing the mechanical characteristic of the structure of the asphalt pavement; constructing a calculation model for the service life of the asphalt pavement under a heavy-duty traffic condition; analyzing the influencing sensibility of the thickness, the rigidity, the subgrade modulus and the axle load of a pavement structural layer to the service life of the asphalt pavement and determining the calculation parameters of the calculation model for the service life of the asphalt pavement; checking the model, if the check is qualified, applying the model and primarily drawing the structure of the asphalt pavement; estimating the service life of the primarily drawn structure of the asphalt pavement according to the calculation model for the service life of the asphalt pavement under the heavy-duty traffic condition; and modifying or optimizing a primarily determined scheme and determining the design parameters of the structure of the asphalt pavement according to a calculation result.
Description
Technical field
The present invention relates to the asphalt highway method for designing in the transportation, particularly a kind of heavily loaded traffic flexible pavement pavement design method in application life that guarantees.
Background technology
The layered system that flexible pavement is made up of multiple layers of different materials is resisted the comprehensive function of traffic load and natural environment jointly, and the design result of flexible pavement should be able to guarantee travel safety and the comfortableness in service life.
The stressed of road structure is very complicated; Various combination form, different-thickness and the modulus value of road structure chosen and can be made the stressing conditions of various structure layer different; Especially under heavy duty now, the traffic effect that overloads, the stressed rule on road surface is different from the computational methods that standard provides, thereby should consider to influence each factor of Damages of Asphalt Road Surface comprehensively; The mechanical response rule of flexible pavement is calculated and confirmed to science, and the application life of reasonable prediction flexible pavement is most important.
China existing " asphalt highway design specifications " (JTG D50-2006) regulation: the flexible pavement design adopts two-wheel group single shaft to carry 100kN as standard axle load, and has provided the calculating parameter of standard axle load.The disalignment of various vehicles is carried the equivalent axles that should be converted into standard axle load and is designed; Provided reduction formula; And adopt road structure distortion and stressing conditions under the effect of carrying of elasticity stratiform theoretical system reference axis; The technical characteristic of ground surface material, parameter value are based on linear elastic theory basically; And test shows that ground surface material can show non-linear nature under heavily loaded traffic effect, needs to investigate the technical characteristic and the parameter value of ground surface material under the heavily loaded transportation condition through system test.And then carry out road structure distortion based on this and calculate with mechanical characteristic, analysis of material characteristic, axle carry characteristic to the sensitiveness that influences in flexible pavement application life, and calculating influence coefficient draws the life forecast model at last.
Existing flexible pavement life forecast method is based on all basically that elasticity stratiform theoretical system provides; The nonlinear characteristic that can not reflect ground surface material under the heavily loaded transportation condition, and in fact, under heavily loaded transportation condition; Asphalt pavement material has tangible nonlinear characteristic; According to existing method for designing selected design parameters and design road surface, it is under heavily loaded traffic effect, and theoretical stress state of strain and actual conditions are not inconsistent.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of heavily loaded traffic flexible pavement pavement design method in application life that guarantees; This method has been considered the nonlinear characteristic of ground surface material under the fully loaded transportation condition; Be convenient to reasonable selection pavement design parameter; Made up flexible pavement computation model in application life under the heavily loaded transportation condition, seen hereinafter for details and describe:
A kind of heavily loaded traffic flexible pavement pavement design method in application life that guarantees said method comprising the steps of:
(1) under the different loads condition, flexible pavement is carried out performance evaluation and test, obtain stress and deformation characteristic, the fatigue properties of asphalt pavement material;
(2) carry situation, the design parameters of selected asphalt pavement material according to the stress of said asphalt pavement material and the axle on deformation characteristic, fatigue properties and design road surface;
(3) analyze the mechanical characteristic of asphalt pavement structure according to the design parameters of asphalt pavement material;
(4) make up flexible pavement computation model in application life under the heavily loaded transportation condition;
(5) analysis road structure layer thickness, rigidity, soil modulus, axle carry the sensitiveness to flexible pavement influence in application life, confirm the calculating parameter of flexible pavement computation model in application life;
Wherein, said flexible pavement application life computation model calculating parameter comprise:
Surface thickness is to influence coefficient computation model in application life:
C
1＝0.9953e
0.0757(H-18)
In the formula: C
1---surface thickness is to the flexible pavement influence coefficient in application life;
H---surface thickness (cm);
The surface layer modulus is to influence coefficient computation model in application life:
C
2＝1.03×10
-3(E-1200)+1.0016
In the formula: C
2---the surface layer modulus is to the flexible pavement influence coefficient in application life;
E---surface layer compression rebound modulu (MPa);
Subbase thickness is to influence coefficient computation model in application life:
C
3＝0.9937e
0.0656(H′-20)
In the formula: C
3---subbase thickness is to the flexible pavement influence coefficient in application life;
H '---subbase thickness (cm);
The subbase modulus is to influence coefficient computation model in application life:
C
4＝1.002×10
-3(E
1-750)+1.0026
In the formula: C
4---the subbase modulus is to the flexible pavement influence coefficient in application life;
E
1---subbase compression rebound modulu (MPa);
Groundwork thickness is to influence coefficient computation model in application life:
C
5＝0.9824e
0.0828(h-40)
In the formula: C
5---groundwork thickness is to the flexible pavement influence coefficient in application life;
H---groundwork thickness (cm);
Basic unit's modulus is to influence coefficient computation model in application life:
C
6＝8.581×10
-4(E
2-1500)+1.0024
In the formula: C
6---basic unit's modulus is to the flexible pavement influence coefficient in application life;
E
2---basic unit's compression rebound modulu (MPa);
Soil modulus is to influence coefficient computation model in application life:
C
7＝0.0607(E
0-40)+0.9439
In the formula: C
7---soil modulus is to the flexible pavement influence coefficient in application life;
E
0---the soil matrix modulus of resilience (MPa);
Axle carries influencing computation model application life:
f(P)＝7.7776×10
19×P
-6.0559
In the formula: .f (P)---axle carries the flexible pavement influence coefficient in application life;
P---axle carries (KN);
Set up flexible pavement computation model in application life under the heavily loaded transportation condition:
N
e＝C
1×C
2×C
3×C
4×C
5×C
6×C
7×f(P)
N
e＝0.9953e
0.0757(H-18)×[0.00103(E-1200)+1.0016]×0.9937e
0.0656(H′-20)×[1.002×10
-3(E
1-750)+10026]×09824e
0.0828(h-40)×[8.581×10
-4(E
2-1500)+1.0024]×[0.0607(E
0-40)+0.9439]×7.7776×10
19P
-6.0559＝7.5569×10
19P
-0.60569×(0.00103E-0.2344)·(1.002×10
-3E
1+0.2511)·(8.581×10
-4E
2-0.2848)·(0.0607E
0-1.4787)×e
0.0757H+0.0656H′+0.0828h-5.9866
(6) flexible pavement computation model in application life under the said heavily loaded transportation condition is tested,, then use this model, execution in step (7) if upcheck; If check is not passed through, then execution in step (4) again;
(7) just intend asphalt pavement structure;
The application life of (8) just intending asphalt pavement structure according to flexible pavement computation model in application life assessment under the heavily loaded transportation condition;
(9) according to the result of calculation in application life of asphalt pavement structure, modification or optimization are just decided scheme, confirm the Asphalt Pavement Structure Design parameter.
According to the result of calculation in application life of asphalt pavement structure, modification or optimization are just decided scheme, confirm that the step of Asphalt Pavement Structure Design parameter is specially described in the step (9):
If the result of calculation in application life of said asphalt pavement structure is consistent with selected design period, then directly confirm said road structure design parameters according to deciding scheme at the beginning of said;
If said asphalt pavement structure application life result of calculation less than selected design period, then execution in step (7) again increases Laminate construction thickness or uses other structural material instead;
If said asphalt pavement structure application life result of calculation much larger than selected design period, then execution in step (7) again reduces Laminate construction thickness.
A kind of heavily loaded traffic flexible pavement pavement design method in application life that guarantees provided by the invention compared with prior art has following advantage:
The present invention has considered the influence of heavily loaded transportation condition to asphalt pavement material characteristic and parameter value; Considered the nonlinear characteristic of asphalt pavement material; Guaranteed the unification of asphalt pavement material design parameters and true stress state of strain effectively; More can embody the actual forced status of flexible pavement under the heavily loaded traffic effect, selected flexible pavement design parameters tallies with the actual situation more.Taken into full account each Laminate construction thickness and modulus (rigidity), soil modulus the rule that influences simultaneously to application life; Provided each influence coefficient computation model; Improved the precision of flexible pavement calculating in application life; Replenished " asphalt highway design specifications " and confirmed, and can carry and the traffic volume situation application life of the flexible pavement under the various deck parameter of the real-time assessment situation according to disalignment to heavily loaded traffic flexible pavement design is inapplicable; For highway relevant departments provide design, maintenance and administration base, improve flexible pavement designing quality, guarantee its application life.
Description of drawings
Fig. 1 is a kind of flow chart that guarantees the pavement design method in heavily loaded traffic flexible pavement application life provided by the invention.
The specific embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
The embodiment of the invention has taken into full account the nonlinear characteristic of ground surface material under the heavily loaded traffic effect; Design and calculation method more can embody the actual forced status of flexible pavement under the heavily loaded traffic effect; Tallying with the actual situation more of selected pavement design parameter; Can carry and traffic volume situation according to disalignment, implement the application life of the flexible pavement under the various deck parameter situation of assessment, design and to guarantee the heavily loaded traffic flexible pavement road structure in application life.In addition, some other flexible pavement method for designing often only is directed to specified conditions, as: under a certain road structure, axle carries with the relation in application life etc., can not apply.In the reality, the axle of different regions, different periods carries and traffic constantly changes, and is widely different; Want to guarantee the application life of flexible pavement under the heavily loaded transportation condition, need to be grasped the parameter that influences flexible pavement application life and influence rule, and the situation in application life of real-time assessment flexible pavement; This at first just needs through test; Study the technical characteristic of asphalt pavement material under the heavily loaded traffic effect,, and then make up the flexible pavement computation model in application life under the heavily loaded transportation condition in the hope of reasonable selection flexible pavement design parameters; Confirm each parameter to the flexible pavement influence coefficient in application life, this also is an embodiment of the invention technical problem to be solved.
101: under the different loads condition, flexible pavement is carried out performance evaluation and test, obtain stress and deformation characteristic, the fatigue properties of asphalt pavement material;
Wherein, This step is specially: through system test; Analyze stress-strain characteristics, the fatigue properties of confirming asphalt pavement material under the different loading conditions; Obtain asphalt pavement material and receive force parameter, deformation parameter, tired parameter, the stress of asphalt pavement material and deformation characteristic, fatigue properties under the particularly heavily loaded transportation condition.This step is confirmed the stressed and deformation characteristic (compression rebound modulu, compressive strength, cleavage strength, flexural tensile strength and modulus etc.) of asphalt pavement material (bituminous mixture, cement stabilized macadam, two-ash broken stones, two-ash soil and rendzinas etc.) under different loading conditions through system test, the stressed influence with technical characteristic such as distortion to asphalt pavement material of clear and definite heavily loaded transportation condition.
Wherein, under the heavily loaded transportation condition (axle carries greater than 130KN), the stressed and deformation characteristic of ground surface material shows significant non-linear characteristic, is different from the elastic performance of conventional design hypothesis.
Wherein, through fatigue test, confirm the fatigue life of flexible pavement under the different stress levels, the fatigue behaviour of clear and definite asphalt pavement material and technical data thereof.
102: carry situation, the design parameters of selected asphalt pavement material according to the stress of asphalt pavement material and the axle on deformation characteristic, fatigue properties and design road surface;
Wherein, according to the test and the analysis result of step 101, the axle on design road surface carries situation, the design parameters of reasonable selection asphalt pavement material, the design parameters of the asphalt pavement material under the particularly heavily loaded transportation condition (for example: compression rebound modulu and intensity etc.).
Wherein, Test and analysis result according to step 101; Can know that asphalt pavement material has nonlinear characteristic (nonlinear characteristic is obvious under the particularly heavily loaded transportation condition), the ground surface material design parameters under the disalignment carrier strip spare is not quite similar, and fibrous root carries the situation reasonable selection according to axle.For example: the compression rebound modulu value of cement stabilized macadam when stress level is 0.7MPa (axle carry 100KN) is 1597MPa, and the compression rebound modulu value of stress level when being 1.0MPa (axle carries 140KN) is 1913MPa, and other ground surface material has similar features.And under the general linear elasticity assumed condition, the compression rebound modulu value of cement stabilized macadam is a constant.
103: the mechanical characteristic of analyzing asphalt pavement structure according to the design parameters of asphalt pavement material;
Wherein, this step is for analyzing the disalignment effect of the carrying mechanical characteristic of asphalt pavement structure down, that is: according to the selected asphalt pavement material design parameters of step 102, the mechanical response that carries out under the loading calculates.
Wherein, this step is calculated the disalignment effect of carrying down, the deformation characteristic of the asphalt pavement structure of different structure combination, the Changing Pattern that promptly clear and definite flexure carries with axle; This step is calculated the disalignment effect of carrying down; The mechanical characteristic of each level of flexible pavement; It is each structure of flexible pavement Changing Pattern of carrying with axle of end tensile stress or compressive stress, each deck shear stress layer by layer; To the suffered stress influence of each deck of flexible pavement, following each structure of the clear and definite disalignment effect of carrying is the Changing Pattern of end tensile stress layer by layer under the clear and definite heavily loaded transportation condition.This step is calculated under different structure layer thickness and the different compression rebound modulu situation, the stressed and deformation characteristic of asphalt pavement structure, and clear and definite thickness and compression rebound modulu are to the influence rule of flexible pavement distortion with stressing conditions.This step is the call parameter in Calculation of Pavement application life (for example: deflection value, layer end tensile stress etc.) also.
104: make up flexible pavement computation model in application life under the heavily loaded transportation condition;
Wherein, Can receive the influence of factors such as axle carries, Laminate construction thickness (surface thickness, groundwork thickness and subbase thickness), deck rigidity (surface thickness, groundwork thickness and subbase thickness), soil modulus the application life of flexible pavement; That is: be that axle carries the application life of flexible pavement, the function of road structure layer thickness, rigidity and soil modulus; Asphalt pavement material parameter and the mechanical characteristic definite according to step 101～103; Clear and definite flexible pavement technical characterictic under the heavily loaded transportation condition constructs flexible pavement computation model in application life under the heavily loaded transportation condition.
105: analysis road structure layer thickness (surface thickness, groundwork thickness and subbase thickness), rigidity (surface layer modulus, basic unit's modulus and subbase modulus), soil modulus, axle carry the sensitiveness to flexible pavement influence in application life, confirm the calculating parameter of flexible pavement computation model in application life;
Wherein, for confirming a kind of factor to the flexible pavement influence in application life, the supposition other factors is a constant earlier, and the variation that calculates this factor is to the flexible pavement influence in application life, clear and definite its rule.For example: in order to confirm the influence of surface thickness to application life; At first supposition axle carries, surface layer layer modulus, basic unit and subbase thickness, basic unit and subbase modulus, soil modulus be constant; Calculating surface thickness changes the flexible pavement influence in application life; Confirm that it influences rule, provide the function of influence factor.Then use identical method and confirm that other factors is to the flexible pavement influence coefficient computing function in application life.
Wherein, this flexible pavement application life computation model calculating parameter comprise:
Surface thickness is to influence coefficient computation model in application life:
C
1＝0.9953e
0.0757(H-18)
In the formula: C
1---surface thickness is to the flexible pavement influence coefficient in application life;
H---surface thickness (cm).
The surface layer modulus is to influence coefficient computation model in application life:
C
2＝1.03×10
-3(E-1200)+1.0016
In the formula: C
2---the surface layer modulus is to the flexible pavement influence coefficient in application life;
E---surface layer compression rebound modulu (MPa).
Subbase thickness is to influence coefficient computation model in application life:
C
3＝0.9937e
0.0656(H′-20)
In the formula: C
3---subbase thickness is to the flexible pavement influence coefficient in application life;
H '---subbase thickness (cm).
The subbase modulus is to influence coefficient computation model in application life:
C
4＝1.002×10
-3(E
1-750)+1.0026
In the formula: C
4---the subbase modulus is to the flexible pavement influence coefficient in application life;
E
1---subbase compression rebound modulu (MPa).
Groundwork thickness is to influence coefficient computation model in application life:
C
5＝0.9824e
0.0828(h-40)
In the formula: C
5---groundwork thickness is to the flexible pavement influence coefficient in application life;
H---groundwork thickness (cm).
Basic unit's modulus is to influence coefficient computation model in application life:
C
6＝8.581×10
-4(E
2-1500)+1.0024
In the formula: C
6---basic unit's modulus is to the flexible pavement influence coefficient in application life;
E
2---basic unit's compression rebound modulu (MPa).
Soil modulus is to influence coefficient computation model in application life:
C
7＝0.0607(E
0-40)+0.9439
In the formula: C
7---soil modulus is to the flexible pavement influence coefficient in application life;
E
0---the soil matrix modulus of resilience (MPa).
Axle carries influencing computation model application life:
f(P)＝7.7776×10
19×P
-6.0559
In the formula: f (P)---axle carries the flexible pavement influence coefficient in application life;
P---axle carries (KN).
Set up flexible pavement computation model in application life under the heavily loaded transportation condition:
N
e＝C
1×C
2×C
3×C
4×C
5×C
6×C
7×f(P)
N
e＝0.9953e
0.0757(H-18)×[0.00103(E-1200)+1.0016]×0.9937e
0.0656(H′-20)×[1.002×10
-3(E
1-750)+1.0026]×0.9824e
0.0828(h-40)×[8.581×10
-4(E
2-1500)+1.0024]×[0.0607(E
0-40)+0.9439]×7.7776×10
19P
-6.0559＝7.5569×10
19P
-0.60569×(0.00103E-0.2344)·(1.002×10
-3E
1+0.2511)·(8.581×10
-4E
2-0.2848)·(0.0607E
0-1.4787)×e
0.0757H+0.0656H′+0.0828h-5.9866
106: flexible pavement computation model in application life under the heavily loaded transportation condition is tested,, then use this model, execution in step 107 if upcheck; If check is not passed through, then execution in step 104 again;
Wherein, The method that computation model is tested application life of flexible pavement under the heavily loaded transportation condition there are two kinds usually; (1) according to the long-term follow monitoring result of highway maintenance administrative department to the flexible pavement user mode, the actual life that draws flexible pavement is in this flexible pavement and load parameter substitution computation model; Calculation of Pavement application life, the error amount of analytical calculation application life and actual life; (2) through the laboratory accelerating and loading test, the application life of calculating certain flexible pavement its result of calculation with heavily loaded traffic flexible pavement computation model in application life is compared, analyze error amount between the two.If error can be accepted, then upcheck; Otherwise execution in step 104 again.
107: just intend asphalt pavement structure;
Wherein, the axle that the bound bitumen road surface need be born carries and the traffic volume and selected flexible pavement design life, tentatively drafts asphalt pavement structure, comprises deck type and thickness etc.
Wherein, when just intending asphalt pavement structure, about selecting of flexible pavement design period; Can select for use according to the general recommendation of standard, the embodiment of the invention can be made design period by oneself according to actual needs; And the selected in view of the above asphalt pavement structure that adapts; For example: provisional flexible pavement can be selected short design period, and the flexible pavement with long-life demand can be selected long design period.
108: according to the application life of the first plan of flexible pavement computation model in application life assessment asphalt pavement structure under the heavily loaded transportation condition;
109: according to the result of calculation in application life of asphalt pavement structure, modification or optimization are just decided scheme, confirm the Asphalt Pavement Structure Design parameter.
Wherein, if the result of calculation in application life of asphalt pavement structure is consistent with selected design period, then directly confirm the road structure parameter according to just deciding scheme.
Wherein, if asphalt pavement structure application life result of calculation less than selected design period, then execution in step 107 again increases Laminate construction thickness or uses other quality structure layer material instead.
Wherein, if asphalt pavement structure application life result of calculation much larger than selected design period, then execution in step 107 again reduces Laminate construction thickness, in the hope of satisfying the maximum economic benefit of obtaining pavement design under the prerequisite that design service life gets.
In sum; Compared with prior art; The embodiment of the invention has been considered the influence of heavily loaded transportation condition to asphalt pavement material characteristic and parameter value, has considered the nonlinear characteristic of asphalt pavement material, has guaranteed the unification of asphalt pavement material design parameters and true stress state of strain effectively; More can embody the actual forced status of flexible pavement under the heavily loaded traffic effect, selected flexible pavement design parameters tallies with the actual situation more.Taken into full account each Laminate construction thickness and modulus (rigidity), soil modulus the rule that influences simultaneously to application life; Provided each influence coefficient computation model; Improved the precision of flexible pavement calculating in application life; Replenished " asphalt highway design specifications " and confirmed, and can carry and the traffic volume situation application life of the flexible pavement under the various deck parameter of the real-time assessment situation according to disalignment to heavily loaded traffic flexible pavement design is inapplicable; For highway relevant departments provide design, maintenance and administration base, improve flexible pavement designing quality, guarantee its application life.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, the invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. one kind guarantees the heavily loaded traffic flexible pavement pavement design method in application life, it is characterized in that, said method comprising the steps of:
(1) under the different loads condition, flexible pavement is carried out performance evaluation and test, obtain stress and deformation characteristic, the fatigue properties of asphalt pavement material;
(2) carry situation, the design parameters of selected asphalt pavement material according to the stress of said asphalt pavement material and the axle on deformation characteristic, fatigue properties and design road surface;
(3) analyze the mechanical characteristic of asphalt pavement structure according to the design parameters of asphalt pavement material;
(4) make up flexible pavement computation model in application life under the heavily loaded transportation condition;
(5) analysis road structure layer thickness, rigidity, soil modulus, axle carry the sensitiveness to flexible pavement influence in application life, confirm the calculating parameter of flexible pavement computation model in application life;
Wherein, said flexible pavement application life computation model calculating parameter comprise:
Surface thickness is to influence coefficient computation model in application life:
C
1＝0.9953e
0.0757(H-18)
In the formula: C
1---surface thickness is to the flexible pavement influence coefficient in application life;
H---surface thickness (cm);
The surface layer modulus is to influence coefficient computation model in application life:
C
2＝1.03×10
-3(E-1200)+1.0016
In the formula: C
2---the surface layer modulus is to the flexible pavement influence coefficient in application life;
E---surface layer compression rebound modulu (MPa);
Subbase thickness is to influence coefficient computation model in application life:
C
3＝0.9937e
0.0656(H′-20)
In the formula: C
3---subbase thickness is to the flexible pavement influence coefficient in application life;
H '---subbase thickness (cm);
The subbase modulus is to influence coefficient computation model in application life:
C
4＝1.002×10
-3(E
1-750)+1.0026
In the formula: C
4---the subbase modulus is to the flexible pavement influence coefficient in application life;
E
1---subbase compression rebound modulu (MPa);
Groundwork thickness is to influence coefficient computation model in application life:
C
5＝0.9824e
0.0828(h-40)
In the formula: C
5---groundwork thickness is to the flexible pavement influence coefficient in application life;
H---groundwork thickness (cm);
Basic unit's modulus is to influence coefficient computation model in application life:
C
6＝8.581×10
-4(E
2-1500)+1.0024
In the formula: C
6---basic unit's modulus is to the flexible pavement influence coefficient in application life;
E
2---basic unit's compression rebound modulu (MPa);
Soil modulus is to influence coefficient computation model in application life:
C
7＝0.0607(E
0-40)+0.9439
In the formula: C
7---soil modulus is to the flexible pavement influence coefficient in application life;
E
0---the soil matrix modulus of resilience (MPa);
Axle carries influencing computation model application life:
f(P)＝7.7776×10
19×P
-6.0559
In the formula: f (P)---axle carries the flexible pavement influence coefficient in application life;
P---axle carries (KN);
Set up flexible pavement computation model in application life under the heavily loaded transportation condition:
N
e＝C
1×C
2×C
3×C
4×C
5×C
6×C
7×f(P)
N
e＝0.9953e
0.0757(H-18)×[0.00103(E-1200)+1.0016]×0.9937e
0.0656(H′-20)×[1.002×10
-3(E
1-750)+1.0026]×0.9824e
0.0828(h-40)×[8.581×10
-4(E
2-1500)+1.0024]×[0.0607(E
0-40)+0.9439]×7.7776×10
19P
-6.0559＝7.5569×10
19P
-0.60569×(0.00103E-0.2344)·(1.002×10
-3E
1+0.2511)·(8.581×10
-4E
2-0.2848)·(0.0607E
0-1.4787)×e
0.0757H+0.0656H′+0.0828h-5.9866
(6) flexible pavement computation model in application life under the said heavily loaded transportation condition is tested,, then use this model, execution in step (7) if upcheck; If check is not passed through, then execution in step (4) again;
(7) just intend asphalt pavement structure;
The application life of (8) just intending asphalt pavement structure according to flexible pavement computation model in application life assessment under the heavily loaded transportation condition;
(9) according to the result of calculation in application life of asphalt pavement structure, modification or optimization are just decided scheme, confirm the Asphalt Pavement Structure Design parameter.
2. a kind of heavily loaded traffic flexible pavement pavement design method in application life that guarantees according to claim 1; It is characterized in that; Described in the step (9) according to the result of calculation in application life of asphalt pavement structure; Modification or optimization are just decided scheme, confirm that the step of Asphalt Pavement Structure Design parameter is specially:
If the result of calculation in application life of said asphalt pavement structure is consistent with selected design period, then directly confirm said road structure design parameters according to deciding scheme at the beginning of said;
If said asphalt pavement structure application life result of calculation less than selected design period, then execution in step (7) again increases Laminate construction thickness or uses other structural material instead;
If said asphalt pavement structure application life result of calculation much larger than selected design period, then execution in step (7) again reduces Laminate construction thickness.
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| CN102505599B CN102505599B (en) | 2014-04-23 |
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| CN201110299329.9A Active CN102505599B (en) | 2011-10-08 | 2011-10-08 | Pavement designing method for guaranteeing service life of heavy-duty traffic asphalt pavement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103031788A (en) * | 2013-01-07 | 2013-04-10 | 天津市市政工程设计研究院 | Method for designing long-life composite pavement structure of underground road |
| CN108517735A (en) * | 2018-04-12 | 2018-09-11 | 长沙理工大学 | A kind of durable asphalt pavement design method and its pavement structure based on bimodular theory |
| CN108660880A (en) * | 2018-03-28 | 2018-10-16 | 扬州大学 | A kind of best determining method of modulus combination of asphalt pavement structural layer |
| CN114164721A (en) * | 2021-11-22 | 2022-03-11 | 山东高速股份有限公司 | Method for designing structure of roadbed and pavement in balanced manner |
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| JP3114096B2 (en) * | 1997-11-14 | 2000-12-04 | 株式会社エフイ石灰工業所 | Road pavement structure evaluation and life prediction method |
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| JPH03114096A (en) * | 1989-06-12 | 1991-05-15 | Nippon Telegr & Teleph Corp <Ntt> | Image decoding device |
| JP2001115407A (en) * | 1999-10-18 | 2001-04-24 | Mikio Kuzuu | Method for constructing asphalt pavement reinforced by reinforcement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031788A (en) * | 2013-01-07 | 2013-04-10 | 天津市市政工程设计研究院 | Method for designing long-life composite pavement structure of underground road |
| CN108660880A (en) * | 2018-03-28 | 2018-10-16 | 扬州大学 | A kind of best determining method of modulus combination of asphalt pavement structural layer |
| CN108660880B (en) * | 2018-03-28 | 2020-04-28 | 扬州大学 | Method for determining optimal modulus combination of asphalt pavement structure layer |
| CN108517735A (en) * | 2018-04-12 | 2018-09-11 | 长沙理工大学 | A kind of durable asphalt pavement design method and its pavement structure based on bimodular theory |
| CN108517735B (en) * | 2018-04-12 | 2020-02-07 | 长沙理工大学 | Durability asphalt pavement design method based on double-modulus theory and pavement structure thereof |
| CN114164721A (en) * | 2021-11-22 | 2022-03-11 | 山东高速股份有限公司 | Method for designing structure of roadbed and pavement in balanced manner |
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| CN102505599B (en) | 2014-04-23 |
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