CN103605841B - A kind of hydraulic asphalt concrete numerical simulation model construction method - Google Patents
A kind of hydraulic asphalt concrete numerical simulation model construction method Download PDFInfo
- Publication number
- CN103605841B CN103605841B CN201310549136.3A CN201310549136A CN103605841B CN 103605841 B CN103605841 B CN 103605841B CN 201310549136 A CN201310549136 A CN 201310549136A CN 103605841 B CN103605841 B CN 103605841B
- Authority
- CN
- China
- Prior art keywords
- asphalt concrete
- hydraulic asphalt
- hydraulic
- numerical simulation
- simulation model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of hydraulic asphalt concrete numerical simulation model construction method.The method comprises the following steps: the hydraulic asphalt concrete sample of match ratio needed for step 1, making, and the actual stress-strain diagram measuring each hydraulic asphalt concrete sample；Step 2, obtain the inside microscopical structure of described hydraulic asphalt concrete sample, and set up the corresponding initial value phantom of described hydraulic asphalt concrete sample according to internal microscopical structure；Step 3, with the obtained stress-strain diagram of step 1 for target, optimization identification method is utilized to adjust the rill evolution of initial value phantom, make to utilize the calculated stress-strain diagram of numerical simulation model to match with the actual stress-strain diagram obtained of measuring, thus the hydraulic asphalt concrete numerical simulation model obtained under this match ratio.The invention also discloses a kind of hydraulic asphalt concrete optimum mix proportion defining method and hydraulic asphalt concrete construction quality evaluation methodology.
Description
Technical field
The present invention relates to the use of the method that computer carries out concrete material mechanical characteristic emulation, particularly relate to a kind of hydraulic asphalt concrete numerical simulation model construction method and a kind of hydraulic asphalt concrete optimum mix proportion defining method, hydraulic asphalt concrete construction quality evaluation methodology.
Background technology
Hydraulic asphalt concrete is to have the mineral aggregate of certain gradation composition and a certain proportion of asphalt material through artificial selection, the compound of mixing when strict control, need to meet the barrier performance of hydraulic structure, simultaneously need to have enough modulus and intensity, meet Deformation control and the safety requirements of hydro-structure.Hydraulic asphalt concrete, according to good antiseepage function, mechanical property and competitive construction costs, is increasingly subject to the attention of domestic and international hydraulic engineering expert.
The optimum mix proportion of bituminous concrete is firstly the need of the problem solved in engineering design.Present stage, tested by interior compression or the physical test means such as triaxial test, inquire into the key property index such as asphalt concrete modulus, intensity, carry out determining optimum mix proportion than choosing, need to work according to substantial amounts of replica test, considerably increase test funds and test period.On the other hand, when existing related specifications choosing match ratio, it does not have consider the impact of the anti-hydraulic fracture characteristic of bituminous concrete.
The experimental condition of bituminous concrete is very big on the impact of its mechanical property.The research of Maopingxi embankment dam shows (Hu Chunlin, yellow Liao Shan, Li Youhua. deformation characteristic research [J] of asphalt concrete core of embankment dams. Wuhan University of Technology's journal, 2001,23 (9): 47-49): the modulus number K value of hydraulic asphalt concrete test specimen is affected very big by forming method, under same test conditions, the maximum K value of hydrostatic profile test specimen reaches 1152.8, and the maximum K value of on-the-spot disturbance core is only 210.2；Rate of loading on the impact of K value it is also obvious that when shear rate is 0.9mm/min, K=330；When shear rate is 2.0mm/min, K=908, K value enlarges markedly with the increase of shear rate.On the strain-stress relation parameter impact of bituminous concrete, also (Gou unit has test temperature relatively greatly, Li Yongle, Xiao Zilong etc. Stress-Strain Relation of Asphalt Concrete experimental study [J]. people the Yellow River, 2005,27 (5): 59-61) K value increase corresponding when, K value during test temperature 0 DEG C is than 10 DEG C 2～8 times more than.As can be seen here, according to the bituminous concrete mechanics parameter that indoor physical test records, owing to the factors such as test method, experimental condition and measurement technology are very sensitive to bituminous concrete mechanical property, the discreteness of indoor the physical results is strong；And according to the mechanical property of on-the-spot core boring sampling, excessive with the test result difference of test chamber sample preparation, it is impossible to the mechanical property of accurate evaluation engineering original position bituminous concrete, it is difficult to control site operation quality comprehensively.
Summary of the invention
The technical problem to be solved is in that to overcome prior art not enough, a kind of hydraulic asphalt concrete numerical simulation model construction method that can more accurately reflect hydraulic asphalt concrete actual physics mechanical characteristic and a kind of hydraulic asphalt concrete optimum mix proportion defining method, hydraulic asphalt concrete construction quality evaluation methodology are provided.
The hydraulic asphalt concrete numerical simulation model construction method of the present invention, comprises the following steps:
The hydraulic asphalt concrete sample of match ratio needed for step 1, making, and the actual stress-strain diagram measuring each hydraulic asphalt concrete sample；
Step 2, obtain the inside microscopical structure of described hydraulic asphalt concrete sample, and set up the corresponding initial value phantom of described hydraulic asphalt concrete sample according to internal microscopical structure；
Step 3, with the obtained stress-strain diagram of step 1 for target, optimization identification method is utilized to adjust the rill evolution of initial value phantom, make to utilize the calculated stress-strain diagram of numerical simulation model to match with the actual stress-strain diagram obtained of measuring, thus the hydraulic asphalt concrete numerical simulation model obtained under this match ratio.
The hydraulic asphalt concrete optimum mix proportion defining method of the present invention, comprises the following steps:
Step 1, make the hydraulic asphalt concrete sample of one group of different mixture ratio, and the actual stress-strain diagram measuring each hydraulic asphalt concrete sample；
Step 2, obtain the inside microscopical structure of each hydraulic asphalt concrete sample respectively, and set up the corresponding initial value phantom of each hydraulic asphalt concrete sample respectively according to internal microscopical structure；
Step 3, for the corresponding initial value phantom of each hydraulic asphalt concrete sample, with the stress-strain diagram of obtained this sample of step 1 for target, optimization identification method is utilized to adjust the rill evolution of initial value phantom, make to utilize the calculated stress-strain diagram of numerical simulation model to match with the actual stress-strain diagram obtained of measuring, thus the hydraulic asphalt concrete numerical simulation model obtained under each match ratio；
Step 4, hydraulic asphalt concrete numerical simulation model under each match ratio is utilized to calculate the physico mechanical characteristic parameter of the hydraulic asphalt concrete under each match ratio, in conjunction with practically necessary physico mechanical characteristic parameter index, it is determined that the optimum mix proportion of hydraulic asphalt concrete.
The hydraulic asphalt concrete construction quality evaluation methodology of the present invention, the match ratio of the hydraulic asphalt concrete that first actual survey engineering is on-the-spot；Then according to numerical simulation model construction method described in any of the above technical scheme, build the hydraulic asphalt concrete numerical simulation model under this match ratio；The hydraulic asphalt concrete numerical simulation model obtained is utilized to calculate the physico mechanical characteristic parameter of hydraulic asphalt concrete, and comparing with the engineering design index of hydraulic asphalt concrete physico mechanical characteristic parameter, so that it is determined that the hydraulic asphalt concrete construction quality of engineering site.
Preferably, uniaxial compression test or the actual stress-strain diagram measuring hydraulic asphalt concrete sample of ordinary triaxial test are used.
Preferably, CT scan method is utilized to obtain the inside microscopical structure of hydraulic asphalt concrete sample.
Preferably, when setting up the corresponding initial value phantom of hydraulic asphalt concrete sample, hydraulic asphalt concrete is considered as three phase materials being made up of aggregate, bitumastic, hole；Mechanical model between particles of aggregates adopts linear contact rigidity model and gliding model, and the mechanical model between Colophonium Horse hoof fat and between Colophonium Horse hoof fat and particles of aggregates adopts Burger ' s model, contacts adhesive model and gliding model.
Preferably, the physico mechanical characteristic parameter of described hydraulic asphalt concrete includes: deformation modulus, breakdown strength, anti-hydraulic fracture ability.
Compared to existing technology, the method have the advantages that
The present invention is in conjunction with a small amount of indoor physical test data, utilize technology of numerical simulation means, consider the characteristics such as the deformation modulus of hydraulic asphalt concrete, breakdown strength and anti-hydraulic fracture ability, it is determined that the optimum mix proportion of hydraulic asphalt concrete, reduce experiment work amount and experimentation cost；Component analysis according to field measurement sampling, the mechanical property of hydraulic asphalt concrete is determined by numerical experimentation, avoid the interference effect of the factor such as temperature, sampling disturbance, effectively reduce physical test and cause the discreteness of result of the test, the more site operation quality of objective evaluation hydraulic asphalt concrete, it is ensured that engineering safety.
Accompanying drawing explanation
Fig. 1 is maximum aggregate size is 19mm, and grading index is the grading curve of the hydraulic asphalt concrete aggregate of 0.35；
Fig. 2 is the stress-strain diagram under hydraulic asphalt concrete uniaxial compression test and the matched curve of simulation numerical test；
Fig. 3 is the stress-strain diagram of hydraulic asphalt concrete under different gradation index；
Fig. 4 is the relation curve of hydraulic asphalt concrete grading index and modulus of compressibility；
Fig. 5 is the relation curve of hydraulic asphalt concrete grading index and comprcssive strength；
Fig. 6 is the relation curve of grading index and hydraulic asphalt concrete cleavage fracture stress.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in detail:
The invention thinking of the present invention is based on the mechanism of action that hydraulic asphalt concrete is inherent, by mesomechanics and Discrete-parcel method, by high accuracy CT scan and reconfiguration technique, set up numerical simulation model and according to indoor physical test Data Inversion rill evolution, thus more being accurately reflected the hydraulic asphalt concrete numerical simulation model of practical situation；And then may utilize the hydraulic asphalt concrete numerical simulation model Computational Physics mechanics parameters set up, incorporation engineering is actually needed the hydraulic asphalt concrete match ratio determining optimum, or the detection data according to engineering site, pass through the hydraulic asphalt concrete numerical simulation model set up, more the site operation quality of objective evaluation hydraulic asphalt concrete.
Optimum mix proportion to determine hydraulic asphalt concrete below, is described in detail to technical scheme:
The hydraulic asphalt concrete optimum mix proportion defining method of the present invention, comprises the following steps:
Step 1, the sample making different mixture ratio measured stress strain curve:
According to hydraulic asphalt concrete anti-seepage earth and rockfill dam design specification and engineering construction service condition, just intend one group or some groups of hydraulic asphalt concrete match ratios, and design porosity, laboratory test test specimen is made according to testing regulations, carry out the uniaxial compression test under given experimental condition (temperature, loading speed etc.) or ordinary triaxial test, it is thus achieved that the stress-strain diagram that each test specimen is corresponding；
Step 2, set up the initial value phantom of each sample:
By high accuracy CT scan technology, obtain the inside microscopical structure of the obtained each hydraulic asphalt concrete test specimen of step 1, in conjunction with the mixture ratio of asphalt concrete drafted, the test specimen manufacture method of physical test in simulating chamber, the basis of mesomechanics uses Discrete-parcel method, builds hydraulic asphalt concrete numerical experimentation test specimen (numerical simulation model) of each match ratio.The numerical simulation model setting up bituminous concrete is existing mature technology, repeats no more herein.
Owing to bituminous concrete is typical heterogeneous complex material, the nature difference of aggregate and Colophonium is relatively big, therefore hydraulic asphalt concrete is considered as the aggregation of three-phase material aggregate, bitumastic (including Colophonium and filler) and hole by the present invention when building initial value phantom.The mechanical model that each phase material adopts is as follows: 1. between particles of aggregates: linear contact rigidity model and gliding model (CundallPA.PFC2DUser ' sManual (Version3.1) [R] .Minneapolis:ItascaConsultingGroupInc, 2002)；Between Colophonium Horse hoof fat 2., between Colophonium Horse hoof fat and particles of aggregates: Burger ' s model, contact adhesive model and gliding model (CundallPA.PFC2DUser ' sManual (Version3.1) [R] .Minneapolis:ItascaConsultingGroupInc, 2002)；
Rill evolution in step 3, inverting numerical simulation model:
For the corresponding initial value phantom of each hydraulic asphalt concrete sample, with the stress-strain diagram of obtained this sample of step 1 for target, optimization identification method (such as immune genetic algorithm) is utilized to adjust the rill evolution of initial value phantom, make to utilize the calculated stress-strain diagram of numerical simulation model to match with the actual stress-strain diagram obtained of measuring, thus the hydraulic asphalt concrete numerical simulation model obtained under each match ratio；
Step 4, hydraulic asphalt concrete numerical simulation model under each match ratio is utilized to calculate the physico mechanical characteristic parameter (such as the characteristic such as deformation modulus, breakdown strength and anti-hydraulic fracture ability) of the hydraulic asphalt concrete under each match ratio, in conjunction with practically necessary physico mechanical characteristic parameter index, it is determined that the optimum mix proportion of hydraulic asphalt concrete.
When carrying out hydraulic asphalt concrete construction quality and evaluating, the match ratio of the hydraulic asphalt concrete that first actual survey engineering is on-the-spot, such as, by core boring sampling at the construction field (site) or other lossless detection method, the porosity of Practical Project hydraulic asphalt concrete and each constituent percentage composition is obtained in conjunction with extraction test, so that it is determined that the match ratio of engineering site hydraulic asphalt concrete；Then adopt the hydraulic asphalt concrete numerical simulation model construction method of the present invention, build the hydraulic asphalt concrete numerical simulation model under this match ratio；The hydraulic asphalt concrete numerical simulation model obtained is utilized to calculate the physico mechanical characteristic parameter (such as the characteristic such as deformation modulus, breakdown strength and anti-hydraulic fracture ability) of hydraulic asphalt concrete, and compare with the engineering design index of hydraulic asphalt concrete physico mechanical characteristic parameter, thus the hydraulic asphalt concrete construction quality of engineering site can be gone out by objective evaluation.
For further illustrating technical solution of the present invention, it is defined as example with the optimum grading index of certain engineering rockfill dam with asphalt concrete core hydraulic asphalt concrete below, illustrates:
(1) formula is pressed with reference to " Bituminous concrete facing of earth-rock dam and core-wall design specification " (DLT-5411) mineral aggregate gradation, just intending hydraulic asphalt concrete match ratio is: maximum aggregate size DmaxFor 19mm, grading index is that r takes 0.35, amount of filler p0.075Accounting for aggregate and always refetch 12%, Colophonium accounts for the 6.5% of gross weight, porosity 1.41%, and the ratio taking asphalt content and filer content is 1:2, and the grading curve of bituminous concrete is shown in Fig. 1.Hydraulic asphalt concrete sample under this match ratio is carried out indoor uniaxial compression test, it is thus achieved that stress-strain diagram see Fig. 2.
(2) the internal microscopical structure of bituminous concrete under this match ratio representative section is obtained by high accuracy CT scan method；Construct according to bituminous concrete internal structure, in conjunction with above-mentioned mixture ratio of asphalt concrete, the test specimen manufacture method of physical test in simulating chamber, use PFC2DHydraulic asphalt concrete numerical simulation computation model under this match ratio of software Primary Construction.Bituminous concrete is considered as three-phase material aggregate, bitumastic and hole by numerical simulation model, and the mechanical model that each phase material adopts is as follows: 1. between particles of aggregates: linear contact rigidity model and gliding model；2. between Colophonium Horse hoof fat, between Colophonium Horse hoof fat and particles of aggregates: Burger ' s model, contact adhesive model and gliding model.
(3) according to the preliminary numerical simulation model set up, the numerical experimentation of simulation uniaxial compression test.According to immune genetic algorithm Optimization inversion rill evolution so that the stress-strain diagram of numerical experimentation, the stress-strain diagram obtained with indoor physical test measurement matches, and sees Fig. 2.Under this match ratio that inverting obtains, the rill evolution of hydraulic asphalt concrete, refers to table 1 below.
Table 1 asphalt concrete test rill evolution
(4) adjusting the grading index of bituminous concrete, build the bituminous concrete numerical simulation model under corresponding grading index, Fig. 3 shows the stress-strain diagram of hydraulic asphalt concrete under different gradation index.Then utilize the numerical simulation model of hydraulic asphalt concrete under the different gradation index obtained, analyze the deformation modulus (referring to Fig. 4) of hydraulic asphalt concrete, breakdown strength (referring to Fig. 5) under different gradation index；Analyze the ability (referring to Fig. 6) of anti-hydraulic fracture under different gradation index.Consider deformation modulus, breakdown strength and anti-hydraulic fracture ability these three physico mechanical characteristic parameter, finally determine that the optimum grading index of hydraulic asphalt concrete is 0.44.
Claims (5)
1. a hydraulic asphalt concrete construction quality evaluation methodology, it is characterised in that the match ratio of the hydraulic asphalt concrete that first actual survey engineering is on-the-spot；Then according to hydraulic asphalt concrete numerical simulation model construction method, build the hydraulic asphalt concrete numerical simulation model under this match ratio；The hydraulic asphalt concrete numerical simulation model obtained is utilized to calculate the physico mechanical characteristic parameter of hydraulic asphalt concrete, and comparing with the engineering design index of hydraulic asphalt concrete physico mechanical characteristic parameter, so that it is determined that the hydraulic asphalt concrete construction quality of engineering site；Wherein,
Hydraulic asphalt concrete numerical simulation model construction method, comprises the following steps:
The hydraulic asphalt concrete sample of match ratio needed for step 1, making, and the actual stress-strain diagram measuring each hydraulic asphalt concrete sample；
Step 2, obtain the inside microscopical structure of described hydraulic asphalt concrete sample, and set up the corresponding initial value phantom of described hydraulic asphalt concrete sample according to internal microscopical structure；
Step 3, with the obtained stress-strain diagram of step 1 for target, optimization identification method is utilized to adjust the rill evolution of initial value phantom, make to utilize the calculated stress-strain diagram of numerical simulation model to match with the actual stress-strain diagram obtained of measuring, thus the hydraulic asphalt concrete numerical simulation model obtained under this match ratio.
2. hydraulic asphalt concrete construction quality evaluation methodology as claimed in claim 1, it is characterised in that use uniaxial compression test or the actual stress-strain diagram measuring hydraulic asphalt concrete sample of ordinary triaxial test.
3. hydraulic asphalt concrete construction quality evaluation methodology as claimed in claim 1, it is characterised in that utilize CT scan method to obtain the inside microscopical structure of hydraulic asphalt concrete sample.
4. hydraulic asphalt concrete construction quality evaluation methodology as claimed in claim 1, it is characterized in that, when setting up the corresponding initial value phantom of hydraulic asphalt concrete sample, hydraulic asphalt concrete is considered as three phase materials being made up of aggregate, bitumastic, hole；Mechanical model between particles of aggregates adopts linear contact rigidity model and gliding model, and the mechanical model between Colophonium Horse hoof fat and between Colophonium Horse hoof fat and particles of aggregates adopts Burger ' s model, contacts adhesive model and gliding model.
5. hydraulic asphalt concrete construction quality evaluation methodology as claimed in claim 1, it is characterised in that described optimization identification method is immune genetic algorithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549136.3A CN103605841B (en) | 2013-11-07 | 2013-11-07 | A kind of hydraulic asphalt concrete numerical simulation model construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549136.3A CN103605841B (en) | 2013-11-07 | 2013-11-07 | A kind of hydraulic asphalt concrete numerical simulation model construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103605841A CN103605841A (en) | 2014-02-26 |
| CN103605841B true CN103605841B (en) | 2016-07-06 |
Family
ID=50124062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310549136.3A Expired - Fee Related CN103605841B (en) | 2013-11-07 | 2013-11-07 | A kind of hydraulic asphalt concrete numerical simulation model construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103605841B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105893712B (en) * | 2016-05-12 | 2017-04-05 | 贵州省交通规划勘察设计研究院股份有限公司 | A kind of asphalt mixture mixing proportion design method and asphalt |
| CN106950120B (en) * | 2017-02-16 | 2019-05-24 | 浙江大学 | A kind of asphalt mixture gradation optimization method under virtual state |
| CN106960116B (en) * | 2017-05-05 | 2020-04-03 | 河海大学 | Dam foundation constraint deformation inversion method based on dam body in-situ displacement monitoring data |
| CN107272443B (en) * | 2017-06-19 | 2020-11-13 | 中国华电科工集团有限公司 | Control method and device for controlled system |
| CN107576782B (en) * | 2017-08-23 | 2019-12-06 | 南京林业大学 | mesomechanics analysis method for semi-flexible pavement under coupling action of vehicle and temperature load |
| CN107480835A (en) * | 2017-09-12 | 2017-12-15 | 南通大学 | A kind of construction method of fiber asphalt concrete viscoelasticity forecast model |
| CN108364350B (en) * | 2018-01-22 | 2021-05-28 | 青岛理工大学 | Three-dimensional reconstruction method for concrete mesoscopic structure model |
| CN109001078B (en) * | 2018-06-12 | 2021-02-09 | 北京城建道桥建设集团有限公司 | Method for establishing constitutive relation of II-type cement-based grouting material |
| CN109085321B (en) * | 2018-07-25 | 2021-06-01 | 石家庄铁道大学 | Calibration method of rock mesomechanics parameters and terminal equipment |
| CN109359416B (en) * | 2018-11-07 | 2023-10-24 | 河北工业大学 | Particle flow numerical simulation method for reflecting real engineering earth-stone mixture distribution |
| CN110031611B (en) * | 2019-04-19 | 2022-02-11 | 哈尔滨工业大学 | Multi-population genetic algorithm-based fractional order viscoelasticity model parameter identification method |
| CN110442967A (en) * | 2019-08-05 | 2019-11-12 | 华能澜沧江水电股份有限公司 | Back Analysis of Concrete Thermal Parameters method |
| CN111470806B (en) * | 2020-04-08 | 2022-04-19 | 新疆农业大学 | Large-particle-size aggregate core wall asphalt concrete and mixing proportion optimization method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932153A (en) * | 2006-09-28 | 2007-03-21 | 贵州省交通科学研究所 | Asphalt proportion ratio design method |
| CN102760309A (en) * | 2012-05-30 | 2012-10-31 | 合肥工业大学 | Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7398131B2 (en) * | 2005-09-15 | 2008-07-08 | Nomadics, Inc. | Method and system for concrete quality control based on the concrete's maturity |
-
2013
- 2013-11-07 CN CN201310549136.3A patent/CN103605841B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932153A (en) * | 2006-09-28 | 2007-03-21 | 贵州省交通科学研究所 | Asphalt proportion ratio design method |
| CN102760309A (en) * | 2012-05-30 | 2012-10-31 | 合肥工业大学 | Bituminous pavement test piece X-ray CT (computed tomography) image-based aggregate mesoscopic solid model reconstruction method |
Non-Patent Citations (2)
| Title |
|---|
| 土石坝沥青混凝土心墙力学参数反演分析;朱晟,等;《岩土力学》;20090331;第30卷(第3期);摘要，第1-2节 * |
| 沥青混凝土单轴蠕变虚拟仿真;李晓军，冯樊;《武汉理工大学学报》;20100731;第32卷(第14期);摘要，第1-3节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103605841A (en) | 2014-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103605841B (en) | A kind of hydraulic asphalt concrete numerical simulation model construction method | |
| CN106153478B (en) | A kind of impact type consolidation object intensity measuring device and its method | |
| Grégoire et al. | Mesoscale analysis of failure in quasi‐brittle materials: comparison between lattice model and acoustic emission data | |
| CN103076271A (en) | Test method for extraction precision of void volume of asphalt mixture | |
| CN106021886B (en) | A kind of method of asphalt strength model under determining complex stress condition | |
| CN106284036A (en) | The evaluation methodology of highway pavement compactness based on GPR | |
| CN110864966A (en) | Compressibility evaluation method suitable for fractured rock | |
| Birgisson et al. | Characterisation of asphalt mixture cracking behaviour using the three-point bending beam test | |
| Zhao et al. | Fatigue damage numerical simulation of cement-treated base materials by discrete element method | |
| Kassem et al. | Probabilistic modeling of the inherent variability in the dynamic modulus master curve of asphalt concrete | |
| CN106013266B (en) | A kind of vertical bearing capacity of single pile feature value detection method related to cement mixing method age | |
| Goh et al. | Determination of flow number in asphalt mixtures from deformation rate during secondary state | |
| Fan et al. | Deformation recovery characteristics of asphalt pavement material on steel bridge decks under nondestructive conditions | |
| Lukiantchuki et al. | Energy ratio (ER) for the standard penetration test based on measured field tests | |
| Yan et al. | Calculation of scale of fluctuation and variance reduction function | |
| Liu et al. | Shear relaxation characteristics of rock joints under stepwise loadings | |
| Roy et al. | Interpretation of flow number test data for asphalt mixtures | |
| Birgisson et al. | Influence of mixture properties on fracture mechanisms in asphalt mixtures | |
| CN103422484A (en) | Method for evaluating ground coefficient K30 values of high-speed railway bed coarse particle soil padding | |
| JP2012141135A (en) | Method for determining parameter of substance migration in bedrock | |
| Easa | New design method of asphalt mixtures considering uncertainty | |
| CN108104179A (en) | A kind of bearing capacity inspection and evaluation method for tilting pile pile | |
| de AL Babadopulos et al. | Aging and Constitutive Modeling of Asphalt Mixtures: Research Developments in Brazil 2 | |
| Mutaz et al. | Variation of Apparent Cohesion and Friction Angle Under Polyaxial Stress Conditions in Concrete | |
| CN105628895B (en) | The detection method of the solid coupling performance of filling fracture rock stream |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20191107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |