CN104915480A - Determination method for semi-rigid base bituminous pavement crack damage state - Google Patents
Determination method for semi-rigid base bituminous pavement crack damage state Download PDFInfo
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Abstract
The invention relates to a determination method for a semi-rigid base bituminous pavement crack damage state. The method comprises the steps that 1, nondestructive deflection testing is conducted on the top surface of a semi-rigid base bituminous pavement crack, the portions which are 15 cm away from the two sides of the crack, the portions which are 50 cm away from the two sides of the crack, the portions which are 100 cm away from the two sides of the crack, the portions which are 150 cm away from the two sides of the rack and the portions which are 200 cm away from the two sides of the crack, and the deflection values of all the testing points are obtained; 2, a deflection curve is drawn through the distance between the testing points and the crack and the deflection values of the testing points; 3, the crack damage state is determined comprehensively according to the line shape of the deflection curve and the maximum deflection value. The determination method for the semi-rigid base bituminous pavement crack damage state has the advantages that deflection testing is conducted on a certain range of the two sides of the crack, and the range of influence of the crack and the damage state of the crack are determined accurately according to the distance from the testing points to the crack and the reflection curve which is drawn according to the deflection values. According to the determination method for the semi-rigid base bituminous pavement crack damage state, the problem that existing determination of the appearance observation of the semi-rigid base bituminous pavement crack damage state is not accurate is solved, and a scientific, accurate and economical basis can be provided for making a pavement maintenance and rehabilitation scheme.
Description
Technical field
The present invention relates to field of road, a kind of semi-rigid asphalt pavement faulted condition defining method is specifically provided.
Background technology
A large amount of semi-rigid asphalt pavements that China builds in early days enter maintenance, maintenance and transformation phase in succession, the pavement structure evaluation method of existing Maintenance specification is not arranged deflection testing position, disease section, and adopt and keep at a certain distance away and carry out the method for deflection testing, normal generation pavement cracking is serious, but the situation that flexure deliberated index is excellent, and can not accurate evaluation pavement structure disease actual carrying capacity.For the determination of the faulted condition in crack, classic method adopts crack outward appearance observation to determine.And found by harmless deflection testing: different crack damage degree is different; Some cracks are very little on flexure impact, at the flexure at crack location place, with that crack location flexure does not occur is substantially identical, only need to carry out cementation of fissures process; The crack that degree of injury is larger, the flexure difference of the flexure at crack place and neighboring area is comparatively large, and flexure difference even reaches more than 3 times, must carry out milling and heavily spread.Different crack processing method engineering costs differs more than 10 times, and existing semi-rigid asphalt pavement crack damage state defining method has influence on science and the economy of pavement maintenance & rehabilitation solution formulation.
Summary of the invention
Technical assignment of the present invention is for above-mentioned the deficiencies in the prior art, provides a kind of semi-rigid asphalt pavement faulted condition defining method.Utilize the method can obtain semi-rigid asphalt pavement faulted condition accurately and reliably.
The concrete technical scheme of the present invention is as follows:
Semi-rigid asphalt pavement faulted condition defining method, concrete is:
The method according to the harmless deflection testing data determination flexure coverage of crack place, both sides, crack, and according to deflection value size and curve feature thereof in its coverage, determines crack and both sides faulted condition thereof.
Concrete, the method comprises the following steps:
A) crack coverage can't harm deflection testing
To semi-rigid type base asphalt pavement crack end face, each 15cm place, both sides, crack, each 50cm place, both sides, crack, each 100cm place, both sides, crack, each 150cm place, both sides, crack, each 200cm place carries out harmless deflection testing with both sides, crack, obtains the deflection value of each check point.
B) flexure Drawing of Curve
Take crack as initial point, the horizontal vertical line in fracture length direction is horizontal ordinate, and each check point deflection value is that ordinate draws flexure curve.
C) flexure tracing analysis and crack damage state are determined
The symmetry of the damage of both sides, crack pavement structure is determined according to the linear symmetry of flexure curve, and according to the variation tendency determination crack damage scope of deflection value line along flaw level vertical line direction; The degree of injury determining crack is compared according to maximum deflection value and design deflection value; Crack damage state is comprehensively determined according to determined crack damage scope, the symmetry of both sides, crack pavement structure damage, crack damage degree.
Semi-rigid asphalt pavement crack damage defining method of the present invention compared with prior art has following outstanding beneficial effect:
(1) the method adopts ripe harmless deflection testing equipment, and fracture both sides certain limit carries out deflection testing, accurately judges crack coverage and faulted condition thereof according to the flexure curve that distance and the deflection value thereof in check point distance crack are drawn.
(2) this method solve the observation of existing semi-rigid asphalt pavement crack damage state appearance and judge inaccurate problem, the formulation that can be pavement maintenance & rehabilitation scheme provides science, accurate, economic foundation.
Accompanying drawing explanation
Fig. 1 is that crack place deflection testing point arranges schematic diagram;
Fig. 2 is the flexure curve of road surface, the slight crack drafting that the present invention chooses;
Fig. 3 is the flexure curve of road surface, the more serious crack drafting that the present invention chooses.
Embodiment
For better the present invention being described, be convenient to understand technical scheme of the present invention, below the present invention is described in more detail.But following embodiment is only simple case of the present invention, does not represent or limits the scope of the present invention, and protection scope of the present invention is as the criterion with claims.
Semi-rigid asphalt pavement crack damage state defining method of the present invention, comprise the following steps and (can't harm deflection testing for the on-the-spot crack of Anhui highway semi-rigid asphalt pavement, choose two cracks, place to detect, a slight crack, place, a more serious crack, place):
A) crack coverage can't harm deflection testing
To semi-rigid type base asphalt pavement crack end face, each 15cm place, both sides, crack, each 50cm place, both sides, crack, each 100cm place, both sides, crack, each 150cm place, both sides, crack, each 200cm place carries out harmless deflection testing with both sides, crack, obtain the deflection value of each check point, as shown in Figure 1.
B) flexure Drawing of Curve
Take crack as initial point, the horizontal vertical line in fracture length direction is horizontal ordinate, and each check point deflection value is that ordinate draws flexure curve, as shown in accompanying drawing 2 and accompanying drawing 3.
C) flexure tracing analysis and crack damage state are determined
The symmetry of the damage of both sides, crack pavement structure is determined according to the linear symmetry of flexure curve, and according to the variation tendency determination crack damage scope of deflection value line along flaw level vertical line direction; The degree of injury determining crack is compared according to maximum deflection value and design deflection value; Crack damage state is comprehensively determined according to determined crack damage scope, the symmetry of both sides, crack pavement structure damage, crack damage degree.
From the flexure curve in accompanying drawing 2 and accompanying drawing 3; Flexure is basicly stable at each 1m place, both sides, crack, and crack damage scope is within each 1m in both sides, crack; The flexure of crack damage scope shown in accompanying drawing 2 is less, stops moisture to enter and can meet the demands by means of only cementation of fissures process; Flexure curve shown in accompanying drawing 3 is symmetric form, and both sides, crack faulted condition is suitable, and crack place flexure is comparatively large, and load-bearing capacity is not enough, and have to pass through milling process and just can meet the demands, milling scope is in each 1m in both sides, crack.
Specific embodiment described is herein only preferred implementation; should be understood that; those skilled in the art; do not departing under concept thereof of the present invention; various amendment, doping, retouching can also be made or supplement or adopt similar mode to substitute; but design of the present invention can't be departed from or surmount scope as defined in the claims, should protection scope of the present invention be considered as.
Claims (3)
1. a semi-rigid asphalt pavement crack damage state defining method, is characterized in that: concrete steps are as follows:
1) harmless deflection testing is carried out to semi-rigid type base asphalt pavement crack end face, each 15cm place, both sides, crack, each 50cm place, both sides, crack, each 100cm place, both sides, crack, each 150cm place, both sides, crack and both sides, crack each 200cm place, obtain the deflection value of each check point;
2) by distance and the deflection value drafting flexure curve thereof in check point distance crack;
3) and maximum deflection value linear according to flexure curve comprehensively determines crack damage state.
2. semi-rigid asphalt pavement crack damage state defining method according to claim 1, is characterized in that, described according to flexure curve linear and maximum deflection value comprehensively determine that crack damage state comprises the following steps:
A) symmetry of the damage of both sides, crack pavement structure is determined according to the linear symmetry of flexure curve, and according to the variation tendency determination crack damage scope of deflection value line along flaw level vertical line direction;
B) compare according to maximum deflection value and design deflection value the degree of injury determining crack;
C) according to step a) and step b) determined crack damage scope, the damage of both sides, crack pavement structure symmetry, crack damage degree comprehensively determine crack damage state.
3. semi-rigid asphalt pavement crack damage state defining method according to claim 1 and 2, it is characterized in that: described flexure curve take crack as initial point, the horizontal vertical line in fracture length direction is horizontal ordinate, and each check point deflection value is that ordinate is drawn.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105372089A (en) * | 2015-12-02 | 2016-03-02 | 上海浦江桥隧高速公路管理有限公司 | Method for detection of bridge hinge joint condition through FWD (Falling Weight Deflectometer) |
| CN105527165A (en) * | 2016-02-02 | 2016-04-27 | 山东省交通科学研究院 | Test method and test device for asphalt pavement crack load response relative displacement |
| CN108414371A (en) * | 2018-03-19 | 2018-08-17 | 昆山市建设工程质量检测中心 | A kind of lossless detection method of asphalt pavement crack situation |
| CN110362930A (en) * | 2019-07-17 | 2019-10-22 | 上海市城市建设设计研究总院（集团）有限公司 | A kind of Asphalt Pavement Base damage method of discrimination based on deflection basin parameter |
| CN112326421A (en) * | 2020-09-28 | 2021-02-05 | 山东省交通科学研究院 | Dynamic modulus test method for asphalt mixture |
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| CN103115827A (en) * | 2013-02-18 | 2013-05-22 | 山东省交通科学研究所 | Method for testing repeated loading four-point stiffness modulus of asphalt mixture |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372089A (en) * | 2015-12-02 | 2016-03-02 | 上海浦江桥隧高速公路管理有限公司 | Method for detection of bridge hinge joint condition through FWD (Falling Weight Deflectometer) |
| CN105527165A (en) * | 2016-02-02 | 2016-04-27 | 山东省交通科学研究院 | Test method and test device for asphalt pavement crack load response relative displacement |
| CN105527165B (en) * | 2016-02-02 | 2018-07-24 | 山东省交通科学研究院 | A kind of asphalt pavement crack load response relative displacement test method and test device |
| CN108414371A (en) * | 2018-03-19 | 2018-08-17 | 昆山市建设工程质量检测中心 | A kind of lossless detection method of asphalt pavement crack situation |
| CN108414371B (en) * | 2018-03-19 | 2020-07-17 | 昆山市建设工程质量检测中心 | Nondestructive testing method for asphalt pavement crack condition |
| CN110362930A (en) * | 2019-07-17 | 2019-10-22 | 上海市城市建设设计研究总院（集团）有限公司 | A kind of Asphalt Pavement Base damage method of discrimination based on deflection basin parameter |
| CN112326421A (en) * | 2020-09-28 | 2021-02-05 | 山东省交通科学研究院 | Dynamic modulus test method for asphalt mixture |
| CN112326421B (en) * | 2020-09-28 | 2023-03-14 | 山东省交通科学研究院 | Dynamic modulus test method for asphalt mixture |
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Inventor after: Wei Jincheng Inventor after: Ma Shijie Inventor after: Ran Jin Inventor after: Zhang Xinhua Inventor after: Sun Xiaonan Inventor after: Liu Jiarong Inventor after: Yu Sixin Inventor after: Su Jianming Inventor after: Sun Zhengfu Inventor after: Han Wenyang Inventor after: Wang Lin Inventor after: Yang Weigang Inventor after: Niu Jian Inventor before: Wei Jincheng Inventor before: Yu Sixin Inventor before: Han Wenyang Inventor before: Wang Lin Inventor before: Ma Shijie Inventor before: Sun Xiaonan |
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Effective date of registration: 20180115 Address after: No. 1877, Ji'nan City, Shandong, Shandong Applicant after: SHANDONG COMMUNICATIONS SCIENCE RESEARCH INSTITUTE Applicant after: Shandong Expressway Co., Ltd. Address before: Shadowless Hill Road Ji'nan city Shandong province 250031 No. 38 Applicant before: SHANDONG COMMUNICATIONS SCIENCE RESEARCH INSTITUTE |
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