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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- 230000006378 damage Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010426 asphalt Substances 0.000 claims abstract description 19
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- 238000013461 design Methods 0.000 claims description 3
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- 239000000203 mixture Substances 0.000 abstract description 2
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- 238000011156 evaluation Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
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- 230000007812 deficiency Effects 0.000 description 1
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Abstract
本发明涉及一种半刚性基层沥青路面裂缝损伤状态确定方法，具体步骤如下：1)对半刚性基层沥青路面裂缝顶面、裂缝两侧各15cm处、裂缝两侧各50cm处、裂缝两侧各100cm处、裂缝两侧各150cm处和裂缝两侧各200cm处进行无损弯沉检测，得到各检测点的弯沉值；2)通过检测点距裂缝的距离及其弯沉值绘制弯沉曲线；3)根据弯沉曲线线形及最大弯沉值综合确定裂缝损伤状态。本发明的有益效果：该方法对裂缝两侧一定范围进行弯沉检测，根据检测点距离裂缝的距离及其弯沉值所绘制的弯沉曲线准确判断裂缝影响范围及其损伤状态。该方法解决了现有半刚性基层沥青路面裂缝损伤状态外观观测判定不准的问题，可为路面养护维修方案的制定提供科学、准确、经济的依据。
The invention relates to a method for determining the crack damage state of a semi-rigid base asphalt pavement. The specific steps are as follows: 1) on the crack top surface of the semi-rigid base asphalt pavement, at 15 cm on both sides of the crack, at 50 cm on both sides of the crack, and at 50 cm on both sides of the crack. 100cm, 150cm on both sides of the crack, and 200cm on both sides of the crack to perform non-destructive deflection testing to obtain the deflection value of each testing point; 2) draw the deflection curve based on the distance from the testing point to the crack and the deflection value; 3) Comprehensively determine the crack damage state according to the deflection curve shape and the maximum deflection value. Beneficial effects of the present invention: the method detects the deflection in a certain range on both sides of the crack, and accurately judges the range affected by the crack and its damage state according to the distance from the detection point to the crack and the deflection curve drawn by the deflection value. This method solves the problem of inaccurate judgment of the appearance of the crack damage state of the existing semi-rigid base asphalt pavement, and can provide a scientific, accurate and economical basis for the formulation of pavement maintenance and repair plans.
Description
技术领域technical field
本发明涉及道路工程领域，具体提供一种半刚性基层沥青路面损伤状态确定方法。The invention relates to the field of road engineering, and specifically provides a method for determining the damage state of a semi-rigid base asphalt pavement.
背景技术Background technique
我国早期修建的大量半刚性基层沥青路面相继进入养护、维修和改造期，现行养护规范的路面结构评价方法未对病害路段弯沉检测位置进行约定，而采用间隔一定距离进行弯沉检测的方法，常发生路面开裂严重，但弯沉评定指标优良的情况，而不能准确评价路面结构病害实际承载力。对于裂缝的损伤状态的确定，传统方法采用裂缝外观观测确定。而通过无损弯沉检测发现：不同裂缝损伤程度不同；有的裂缝对弯沉影响很小，在裂缝位置处的弯沉，与未发生开裂位置弯沉基本相同，仅需要进行灌缝处理；损伤程度较大的裂缝，在裂缝处的弯沉与周边区域的弯沉差别较大，弯沉差别甚至达到3倍以上，必须进行铣刨重铺。不同的裂缝处理方法工程费用相差10倍以上，现行半刚性基层沥青路面裂缝损伤状态确定方法影响到路面养护维修方案制定的科学性与经济性。A large number of semi-rigid base asphalt pavements built in my country in the early stage have entered the period of maintenance, repair and renovation. The pavement structure evaluation method of the current maintenance norms does not stipulate the deflection detection position of the diseased road section, but adopts the method of deflection detection at a certain distance. It often happens that the pavement is severely cracked, but the deflection evaluation index is excellent, and the actual bearing capacity of the pavement structural disease cannot be accurately evaluated. For the determination of the damage state of the crack, the traditional method adopts the observation of the appearance of the crack. However, through non-destructive deflection testing, it is found that different cracks have different damage degrees; some cracks have little effect on deflection, and the deflection at the crack position is basically the same as that at the position without cracking, and only need to be filled with cracks; For larger cracks, the deflection at the crack is quite different from that in the surrounding area, and the difference in deflection can even reach more than 3 times, so milling and resurfacing must be carried out. The engineering costs of different crack treatment methods vary by more than 10 times. The current method for determining the crack damage state of semi-rigid base asphalt pavement affects the scientificity and economy of the pavement maintenance plan.
发明内容Contents of the invention
本发明的技术任务是针对上述现有技术的不足，提供一种半刚性基层沥青路面损伤状态确定方法。利用该方法可获得准确可靠的半刚性基层沥青路面损伤状态。The technical task of the present invention is to provide a method for determining the damage state of semi-rigid base asphalt pavement aiming at the deficiencies of the above-mentioned prior art. Using this method, the accurate and reliable damage state of semi-rigid base asphalt pavement can be obtained.
本发明具体的技术方案如下：Concrete technical scheme of the present invention is as follows:
半刚性基层沥青路面损伤状态确定方法，具体的为：The method for determining the damage state of semi-rigid base asphalt pavement, specifically:
该方法依据裂缝处、裂缝两侧的无损弯沉检测数据确定弯沉影响范围，并根据其影响范围内弯沉值大小及其曲线特点，确定裂缝及其两侧损伤状态。In this method, the deflection influence range is determined based on the non-destructive deflection detection data at the crack and on both sides of the crack, and the crack and the damage state on both sides are determined according to the deflection value and the characteristics of the curve in the range of influence.
具体的，该方法包括以下步骤：Specifically, the method includes the following steps:
a)裂缝影响范围无损弯沉检测a) Non-destructive deflection detection of the affected range of cracks
对半刚性基层沥青路面裂缝顶面、裂缝两侧各15cm处、裂缝两侧各50cm处、裂缝两侧各100cm处、裂缝两侧各150cm处，和裂缝两侧各200cm处进行无损弯沉检测，得到各检测点的弯沉值。Non-destructive deflection testing is carried out on the top surface of the crack on the semi-rigid base asphalt pavement, 15 cm on both sides of the crack, 50 cm on both sides of the crack, 100 cm on both sides of the crack, 150 cm on both sides of the crack, and 200 cm on both sides of the crack , to get the deflection value of each detection point.
b)弯沉曲线绘制b) Deflection curve drawing
以裂缝为原点，裂缝长度方向的水平垂直线为横坐标，各检测点弯沉值为纵坐标绘制弯沉曲线。Taking the crack as the origin, the horizontal and vertical lines in the crack length direction are the abscissa, and the deflection values of each detection point are drawn as the ordinate to draw the deflection curve.
c)弯沉曲线分析及裂缝损伤状态确定c) Deflection curve analysis and determination of crack damage state
根据弯沉曲线线形对称性确定裂缝两侧路面结构的损伤的对称性，并根据弯沉值线沿裂缝水平垂线方向的变化趋势确定裂缝损伤范围；根据最大弯沉值与设计弯沉值的比较确定裂缝的损伤程度；根据所确定的裂缝损伤范围、裂缝两侧路面结构损伤的对称性、裂缝损伤程度综合确定裂缝损伤状态。Determine the damage symmetry of the pavement structure on both sides of the crack according to the linear symmetry of the deflection curve, and determine the damage range of the crack according to the change trend of the deflection value line along the horizontal and vertical direction of the crack; according to the relationship between the maximum deflection value and the design deflection value Comparing and determining the damage degree of the crack; comprehensively determining the crack damage state according to the determined crack damage range, the symmetry of the pavement structure damage on both sides of the crack, and the crack damage degree.
本发明的半刚性基层沥青路面裂缝损伤确定方法与现有技术相比具有以下突出有益效果：Compared with the prior art, the semi-rigid base asphalt pavement crack damage determination method of the present invention has the following outstanding beneficial effects:
(一)该方法采用成熟的无损弯沉检测设备，对裂缝两侧一定范围进行弯沉检测，根据检测点距离裂缝的距离及其弯沉值所绘制的弯沉曲线准确判断裂缝影响范围及其损伤状态。(1) This method uses mature non-destructive deflection detection equipment to detect deflection in a certain range on both sides of the crack, and accurately judges the range of crack influence and its deflection curve based on the distance from the detection point to the crack and the deflection value. damage status.
(二)该方法解决了现有半刚性基层沥青路面裂缝损伤状态外观观测判定不准的问题，可为路面养护维修方案的制定提供科学、准确、经济的依据。(2) This method solves the problem of inaccurate judgment of the appearance of the crack damage state of the existing semi-rigid base asphalt pavement, and can provide a scientific, accurate and economical basis for the formulation of pavement maintenance and repair plans.
附图说明Description of drawings
图1为裂缝处弯沉检测点布置示意图；Figure 1 is a schematic diagram of the arrangement of deflection detection points at cracks;
图2为本发明选取的轻微裂缝路面绘制的弯沉曲线；Fig. 2 is the deflection curve drawn for the slight crack pavement that the present invention chooses;
图3为本发明选取的较严重裂缝路面绘制的弯沉曲线。Fig. 3 is the deflection curve drawn for the more serious cracked pavement selected by the present invention.
具体实施方式Detailed ways
为更好地说明本发明，便于理解本发明的技术方案，下面对本发明进一步详细说明。但下述的实施实例仅仅是本发明的简单例子，并不代表或限制本发明的权利保护范围，本发明的保护范围以权利要求书为准。In order to better illustrate the present invention and facilitate understanding of the technical solution of the present invention, the present invention will be further described in detail below. However, the following implementation examples are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention shall be determined by the claims.
本发明的半刚性基层沥青路面裂缝损伤状态确定方法，包括以下步骤(以安徽某高速公路半刚性基层沥青路面现场裂缝无损弯沉检测为例，选取两处裂缝进行检测，一处轻微裂缝，一处较严重裂缝)：The method for determining the crack damage state of the semi-rigid base asphalt pavement of the present invention comprises the following steps (taking the on-site crack non-destructive deflection detection of a semi-rigid base asphalt pavement of an expressway in Anhui as an example, two cracks are selected for detection, a slight crack and a severe cracks):
a)裂缝影响范围无损弯沉检测a) Non-destructive deflection detection of the affected range of cracks
对半刚性基层沥青路面裂缝顶面、裂缝两侧各15cm处、裂缝两侧各50cm处、裂缝两侧各100cm处、裂缝两侧各150cm处，和裂缝两侧各200cm处进行无损弯沉检测，得到各检测点的弯沉值，如附图1所示。Non-destructive deflection testing is carried out on the top surface of the crack on the semi-rigid base asphalt pavement, 15 cm on both sides of the crack, 50 cm on both sides of the crack, 100 cm on both sides of the crack, 150 cm on both sides of the crack, and 200 cm on both sides of the crack , to obtain the deflection value of each detection point, as shown in Figure 1.
b)弯沉曲线绘制b) Deflection curve drawing
以裂缝为原点，裂缝长度方向的水平垂直线为横坐标，各检测点弯沉值为纵坐标绘制弯沉曲线，如附图2和附图3所示。Taking the crack as the origin, the horizontal and vertical lines in the crack length direction as the abscissa, and the deflection values of each detection point as the ordinate, draw a deflection curve, as shown in Figure 2 and Figure 3.
c)弯沉曲线分析及裂缝损伤状态确定c) Deflection curve analysis and determination of crack damage state
根据弯沉曲线线形对称性确定裂缝两侧路面结构的损伤的对称性，并根据弯沉值线沿裂缝水平垂线方向的变化趋势确定裂缝损伤范围；根据最大弯沉值与设计弯沉值的比较确定裂缝的损伤程度；根据所确定的裂缝损伤范围、裂缝两侧路面结构损伤的对称性、裂缝损伤程度综合确定裂缝损伤状态。Determine the damage symmetry of the pavement structure on both sides of the crack according to the linear symmetry of the deflection curve, and determine the damage range of the crack according to the change trend of the deflection value line along the horizontal and vertical direction of the crack; according to the relationship between the maximum deflection value and the design deflection value Comparing and determining the damage degree of the crack; comprehensively determining the crack damage state according to the determined crack damage range, the symmetry of the pavement structure damage on both sides of the crack, and the crack damage degree.
由附图2和附图3中的弯沉曲线可知；弯沉在裂缝两侧各1m处基本稳定，裂缝损伤范围为裂缝两侧各1m以内；附图2所示裂缝损伤范围弯沉较小，仅通过灌缝处理阻止水分进入即可满足要求；附图3所示弯沉曲线为对称型，裂缝两侧损伤状态相当，并且裂缝处弯沉较大，承载能力不足，必须经过铣刨处理才能满足要求，铣刨范围为裂缝两侧各1m内。From the deflection curves in attached drawings 2 and 3, it can be seen that the deflection is basically stable at 1m on both sides of the crack, and the crack damage range is within 1m on both sides of the crack; the deflection of the crack damage range shown in attached drawing 2 is relatively small , the requirements can be met only by filling the joints to prevent water from entering; the deflection curve shown in Figure 3 is symmetrical, the damage state on both sides of the crack is equivalent, and the deflection at the crack is relatively large, and the bearing capacity is insufficient, so it must be milled. In order to meet the requirements, the milling range is within 1m on both sides of the crack.
本文中所述的具体实施例仅为优选实施方式，应当指出，本技术领域的普通技术人员，在不脱离本发明的构思前提下，还可以做各种各样的修改、掺杂、润饰或补充或采用类似的方式替代，但并不会偏离本发明的构思或超越权利要求书所定义的范围，应视为本发明的保护范围。The specific embodiments described herein are only preferred implementations. It should be pointed out that those skilled in the art can make various modifications, doping, embellishments or modifications without departing from the concept of the present invention. Supplementation or substitution in a similar manner, but will not deviate from the concept of the present invention or exceed the scope defined in the claims, should be regarded as the protection scope of the present invention.
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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) |
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| 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 | A kind of test method for dynamic modulus of asphalt mixture |
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