CN102879169B - Field dynamic load testing method for collision resistance and safety of highway corrugated beam barriers - Google Patents
Field dynamic load testing method for collision resistance and safety of highway corrugated beam barriers Download PDFInfo
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- CN102879169B CN102879169B CN201210382616.0A CN201210382616A CN102879169B CN 102879169 B CN102879169 B CN 102879169B CN 201210382616 A CN201210382616 A CN 201210382616A CN 102879169 B CN102879169 B CN 102879169B
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Abstract
The invention discloses a field dynamic load testing method for collision resistance and safety of highway corrugated beam barriers. The method comprises the steps of selecting a collision point; arranging a steel coupling block, a high-speed camera and a displacement measurement scale; colliding a weight against the steel coupling block to obtain measurement results and the like. According to the field dynamic load testing method for collision resistance and safety of highway corrugated beam barriers, safety performances of highway corrugated beam barriers can be tested in the engineering field, and the testing method is not limited by places and highway conditions; and not only the implementation cost is low, but also the testing operation is convenient and rapid, the testing efficiency is high, and testing results are accurate and reliable. The field dynamic load testing method can help highway operation management units grasp security performances of traffic safety facilities of governed highway sections, and can also serve as an approach for quality supervision units to supervise and check barrier construction quality randomly.
Description
Technical field
The invention belongs to technical field of highway traffic, specifically, particularly a kind of road waved guardrail security performance on-site measurement method, is mainly used in the in-site measurement of road waved guardrail security performance.
Background technology
Highway in China is while the fast development of promotion national economy, and higher road traffic accident incidence and mortality ratio also give rapid development of economy, the continual and steady and the people's lives and property of society brings safely many adverse effects.The barrier type of highway especially highway is based on corrugated beam steeled protection fence, and much serious traffic hazard all betides vehicle and rushes open guardrail, run-off-road.So the security performance of guardrail has great significance for protection traffic safety.
The country that external highway communication is more flourishing just gets down to the research of guardrail at the initial stage that highway occurs.These countries mainly contain the U.S., France, Britain, Germany, Japan etc.A large amount of data and rich experience is have accumulated in the guardrail scope of application, structural design, functional requirement, construction and installation etc.
China started to conduct a research in the design, production and construction etc. for freeway guardrail in the enforcement period of the seventh five-year plan.Research Institute of Highway, Ministry of Communications carried out systematic study to corrugated beam barrier from 1984.1992, draft " corrugated beam barrier real vehicle collision test scheme ", carried out the Task of first time field vehicle full scale crash test subsequently more than a year, and established a whole set of experimental technique and facility.At the beginning of 1994, China has formulated industry standard (JTJ 074-94) " expressway traffic safety facilities design and construction technical manual ".2000 year traffic portions write and have issued " highway three corrugated beam steeled protection fence " industry standard and applied, and are mainly used in heavy goods vehicles, the landform disadvantage such as section and mountainous area highway that large car ratio is high.
In recent years, domesticly in highway traffic safety facility, many new industry standards, national standard are formulated, or original standard is revised, as " highway traffic safety facilities design detailed rules and regulations " (JTGD81-2006), " freeway guardrail security performance evaluation standard " (JTG/TF83-01-2004) and " highway traffic safety facility construction technique normalizing " (JTG F71-2006) etc.These standards, specification are since enforcement, construction unit, supervisor, unit in charge of construction and traffic quality supervision and inspection body common promotion under, obtain popularity in the whole nation and extensively adopt, become the major technique foundation that highway barrier hands over the work such as (completing) work acceptance quality evaluation, obtain the accreditation of industry.
The evaluation of above-mentioned specification to highway barrier security performance is based upon in ecotopia, and the design and construction for highway barrier have directive significance generally.In Practical Project, use the security performance after a period of time to be also subject to the impact of the factor such as road line style (flat, vertical), stability of foundation, installation quality after guardrail installs, even, the security performance assessing technique and method during this also belongs to blank.Almost the reality that guardrail causes major traffic accidents crossed by the domestic vehicle that all can occur repeatedly every year, also has higher requirement from another one angle to the security performance test and assessment technology of highway in China guardrail.
At present, the security performance for highway barrier detects, and mainly contains full-scale crash test method and computer emulation method two class.Although full-scale crash test method is acknowledged as the most directly and effective method, can only carry out in laboratory, and be destructive test, experimental cost is high, and the result of experiment is difficult to assess the guardrail security performance of engineering site.Although computer simulation emulation has higher theory directive significance, still must obtain with the anastomose property of real road security system the inspection put into practice.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method detected road waved guardrail security performance at engineering site.
Technical scheme of the present invention is as follows: the on-the-spot dynamic load detection method of a kind of road waved guardrail anti-collision safety, comprises the following steps:
1) corrugated beam barrier (1) point midway be positioned between two root posts (2) is selected to be rum point, install steel coupling block (3) at rum point place, this steel coupling block (3) is positioned on the side of corrugated beam barrier (1) inner side;
2) in steel coupling block (3) top, high-speed camera (8) is set, the position that is impacted of the alignment lens corrugated beam barrier (1) of this high-speed camera (8);
3) installation position, rum point side shift measurement scale (9) on corrugated beam barrier (1), and make displacement measurement scale (9) and corrugated beam barrier (1) perpendicular;
4) strike on steel coupling block (3) with weight;
5) misalignment of the dynamic image taken according to high-speed camera (8) and the corrugated beam barrier (1) measured by displacement measurement scale (9), deformation extent and the displacement of corrugated beam barrier (1) can be learnt, obtained deformation extent and displacement are compared with standard reference value, the anti-collision safety performance of this corrugated beam barrier (1) can be judged.
Adopt above technical scheme, weight clashes into corrugated beam barrier by steel coupling block, high-speed camera is aimed at the impingement position of corrugated beam barrier and is taken, and effect helps to judge degree when corrugated beam barrier is impacted and displacement, and concrete displacement records by displacement measurement scale.Impingement position arranges steel coupling block, makes to clash into the section that strength is evenly distributed to whole corrugated beam barrier, and the result detected like this is truer, accurate.The invention process cost is cheap, detect operation not only convenient but also quick, and it is short to detect the time spent, the on-the-spot needs detected in real time of corrugated beam barrier security performance of different location, different road conditions can be met, highway operation management unit can be helped to grasp the safety guarantee performance of administrative road section traffic volume safety installations, also can be used as quality supervision unit to guardrail construction quality exercise supervision selective examination a kind of means.
Described steel coupling block (3) is box structure, on the surface of corrugated beam barrier (1), have wave shape groove at steel coupling block (3), the shape of this wave shape groove and corrugated beam barrier (1) adapts.Steel coupling block processing and fabricating is easy on the one hand for above structure, and cost is low; On the other hand, can guarantee corrugated beam barrier be impacted place each several part uniform force, to improve accuracy and the reliability of testing result further.
Described steel coupling block (3) is fixedly mounted on corrugated beam barrier (1) by the mode of mounting or clamping, and the dismounting of such steel coupling block is all very convenient, and it is firm to guarantee that steel coupling block is connected with corrugated beam barrier.
Described weight is steel ball (6), and this steel ball (6) is lifted on the inner side of corrugated beam barrier (1), and near steel coupling block (3); Time initial, steel ball (6) is freely sagging, and steel ball (6) and steel coupling block (3) are on same level height.Adopt steel ball as rammer, selection is convenient, and processing and fabricating is easy; The strength of above structural steel ball impact on steel coupling block is concentrated, and makes steel coupling block equably impact be passed to corrugated beam barrier, thus guarantees the accuracy of testing result.
The first column (4) installed by the highway of described corrugated beam barrier (1) inner side, the upper end of this first column (4) is fixed with first crossbeam (5) vertical with it, in the below of first crossbeam (5), steel ball (6) is set, steel ball (6) fixes with the lower end of swing arm (7), the cantilever end of upper end thereof in first crossbeam (5) of swing arm (7).The mounting structure of above scheme one side steel ball is simple, is conducive to assembling fast at the scene, while reduction experimentation cost, can improves the efficiency detected; On the other hand, can guarantee that steel ball motion flexibly, reliably by swing mode.
Described high-speed camera (8) is installed on one end of second cross beam (10), the other end of second cross beam (10) and the upper end of the second column (11) fix, second column (11) is perpendicular with second cross beam (10), and the second column (11) lower end is fixed on highway.High-speed camera is installed by other crossbeam and column, clashes in the process of steel coupling block like this at weight, and high-speed camera keeps static, can not affect shooting effect because of shake.
Institute's displacement measurement scale (9) is arranged on the upper end of the 3rd column (12), and the 3rd column (12) is perpendicular with displacement measurement scale (9), and the lower end of the 3rd column (12) is fixed on highway.Displacement measurement scale does not contact with corrugated beam barrier, can the deflection that is impacted of Measurement accuracy corrugated beam barrier.
Beneficial effect: the present invention can detect in the security performance of engineering site to road waved guardrail, not by the restriction of place, road conditions, not only implementation cost is cheap, and detects convenient to operation, and detection efficiency is high, and testing result accurately, reliably.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is collision theory figure of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1 and Figure 2, the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety, comprises the following steps:
Embodiment 1
1) select the point midway of corrugated beam barrier 1 between two adjacent upright posts 2 to be rum point, install steel coupling block 3 at rum point place, this steel coupling block 3 is positioned on the side of (side towards highway) inside corrugated beam barrier 1.Steel coupling block 3 is box structure, the surface of steel coupling block 3 towards corrugated beam barrier 1 has wave shape groove, the shape size of this wave shape groove and the section of corrugated beam barrier 1 adapt, and the medial surface of wave shape groove and steel coupling block 3 is fitted completely.Steel coupling block 3 is articulated on corrugated beam barrier 1 by the hook that its upper end is arranged, and the buckle that steel coupling block 3 also can be arranged by its upper and lower side is connected on corrugated beam barrier 1.Certainly, as equivalent replacement, steel coupling block 3 also can adopt alternate manner to be connected with corrugated beam barrier 1, as long as steel coupling block 3 can be fixed on corrugated beam barrier 1.
2) high-speed camera 8 is set on the side of first crossbeam 5, the position that is impacted of the alignment lens corrugated beam barrier 1 of this high-speed camera 8.Described high-speed camera 8 is installed on one end of second cross beam 10, and the other end of second cross beam 10 and the upper end of the second column 11 fix, and the second column 11 is perpendicular with second cross beam 10, and the second column 11 lower end is fixed on highway.
3) installation position, the rum point side shift measurement scale 9 on corrugated beam barrier 1, displacement measurement scale 9 can above corrugated beam barrier 1, also can in the below of corrugated beam barrier 1.One end of displacement measurement scale 9 is fixed on the upper end of the 3rd column 12, and the 3rd column 12 is perpendicular with displacement measurement scale 9, and the lower end of the 3rd column 12 is fixed on highway, and displacement measurement scale 9 is perpendicular with corrugated beam barrier 1.
4) strike on steel coupling block 3 with weight.Described weight is steel ball 6, this steel ball 6 fixes with the lower end of swing arm 7, the upper end thereof of swing arm 7 is at the cantilever end of first crossbeam 5, first crossbeam 5 the other end and the upper end of the first column 4 fix, and first crossbeam 5 and the first column 4 perpendicular, and the first column 4 is fixed on the highway inside corrugated beam barrier 1, the first column 4 parallels with the column 2 of guardrail.Described swing arm 7 is connected by bearing or the structure such as universal joint or pin with between first crossbeam 5, as long as guarantee that swing arm 7 can freely swing by first crossbeam 5 relatively in the perpendicular perpendicular to corrugated beam barrier 1.Time initial, steel ball 6 is freely sagging, and make steel ball 6 near steel coupling block 3, close distance is determined according to actual needs, and steel ball 6 and steel coupling block 3 are on same level height, and steel ball 6 is just to steel coupling block 3; When carrying out detecting, steel ball 6 is risen (lifting process steel ball 6 and the pin joint of swing arm 7 around swing arm 7 upper end are as Fig. 1 clockwise oscillation) by lifting gear, make steel ball 6 and swing arm 7 in same level, and swing arm 7 is vertical with corrugated beam barrier 1.Lifting gear can be motor+stayed structure, also can be other similar structure, as long as steel ball 6 and swing arm 7 can be risen to assigned position and stablize; Release steel ball 6, steel ball 6 falls naturally (steel ball 6 and the pin joint of swing arm 7 around swing arm 7 upper end are as Fig. 1 counter-clockwise swing), and steel ball 6 can strike on steel coupling block 3.
5) process that high-speed camera 8 pairs of steel coupling blocks 3 and corrugated beam barrier 1 are impacted is taken, and shift measurement scale 9 can the displacement that is impacted of measured waveform beam guardrail 1.The misalignment of the dynamic image taken according to high-speed camera 8 and the corrugated beam barrier 1 measured by displacement measurement scale 9, deformation extent and the displacement of corrugated beam barrier 1 can be learnt, obtained deformation extent and displacement are compared with standard reference value, the anti-collision safety performance of this corrugated beam barrier 1 can be judged: if the deformation extent obtained and displacement are in the scope of standard reference value, then the anti-collision safety of detected corrugated beam barrier 1 meets the requirements; Otherwise then do not meet.Standard reference value is in strict accordance with after specification fabrication and installation corrugated beam barrier in code test field, according to the value that above-mentioned steps measurement draws.
Embodiment 2
The step 4 of the present embodiment) in, weight selects casting pig, and this casting pig strikes on steel coupling block 3 under the effect of catapult-launching gear elastic force.All the other steps of the present embodiment are identical with embodiment 1, and therefore not to repeat here.The concrete structure of described catapult-launching gear can select existing structure according to actual needs, as long as can provide elastic force to weight.
Embodiment 3
The step 4 of the present embodiment) in, weight selects steel column, and this steel column strikes on steel coupling block 3 under the effect of draw-gear tractive force.All the other steps of the present embodiment are identical with embodiment 1, and therefore not to repeat here.The concrete structure of described draw-gear can select existing structure according to actual needs, as long as can provide tractive force to weight.
Although be below described the preferred embodiments of the present invention by reference to the accompanying drawings, but the invention is not restricted to above-mentioned embodiment, above-mentioned embodiment is only schematic instead of determinate, those of ordinary skill in the art is under enlightenment of the present invention, under the prerequisite without prejudice to present inventive concept and claim, can make like multiple types and representing, as changed the structure of weight, or change the mode driving weight to clash into steel coupling block, or change high-speed camera into general video camera etc., such conversion all falls within protection scope of the present invention.
Claims (7)
1. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety, is characterized in that comprising the following steps:
1) corrugated beam barrier (1) point midway be positioned between two root posts (2) is selected to be rum point, install steel coupling block (3) at rum point place, this steel coupling block (3) is positioned on the side of corrugated beam barrier (1) inner side;
2) in steel coupling block (3) top, high-speed camera (8) is set, the position that is impacted of the alignment lens corrugated beam barrier (1) of this high-speed camera (8);
3) installation position, rum point side shift measurement scale (9) on corrugated beam barrier (1), and make displacement measurement scale (9) and corrugated beam barrier (1) perpendicular;
4) strike on steel coupling block (3) with weight;
5) misalignment of the dynamic image taken according to high-speed camera (8) and the corrugated beam barrier (1) measured by displacement measurement scale (9), deformation extent and the displacement of corrugated beam barrier (1) can be learnt, obtained deformation extent and displacement are compared with standard reference value, the anti-collision safety performance of this corrugated beam barrier (1) can be judged.
2. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety according to claim 1, it is characterized in that: described steel coupling block (3) is box structure, on the surface of corrugated beam barrier (1), have wave shape groove at steel coupling block (3), the shape of this wave shape groove and corrugated beam barrier (1) adapts.
3. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety according to claim 1 and 2, is characterized in that: described steel coupling block (3) is fixedly mounted on corrugated beam barrier (1) by the mode of mounting or clamping.
4. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety according to claim 1 and 2, it is characterized in that: described weight is steel ball (6), this steel ball (6) is lifted on the inner side of corrugated beam barrier (1), and near steel coupling block (3); Time initial, steel ball (6) is freely sagging, and steel ball (6) and steel coupling block (3) are on same level height.
5. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety according to claim 4, it is characterized in that: on the highway of described corrugated beam barrier (1) inner side, the first column (4) is installed, the upper end of this first column (4) is fixed with first crossbeam (5) vertical with it, in the below of first crossbeam (5), steel ball (6) is set, steel ball (6) fixes with the lower end of swing arm (7), the cantilever end of upper end thereof in first crossbeam (5) of swing arm (7).
6. the on-the-spot dynamic load detection method of the road waved guardrail anti-collision safety according to claim 1 or 2 or 5, it is characterized in that: described high-speed camera (8) is installed on one end of second cross beam (10), the other end of second cross beam (10) and the upper end of the second column (11) fix, second column (11) is perpendicular with second cross beam (10), and the second column (11) lower end is fixed on highway.
7. the on-the-spot dynamic load detection method of road waved guardrail anti-collision safety according to claim 1, it is characterized in that: institute's displacement measurement scale (9) is arranged on the upper end of the 3rd column (12), 3rd column (12) is perpendicular with displacement measurement scale (9), and the lower end of the 3rd column (12) is fixed on highway.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100013904A1 (en) * | 2021-05-27 | 2022-11-27 | Anas S P A | SYSTEM FOR TESTING ROAD PROTECTION BARRIERS |
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| DE4320296A1 (en) * | 1993-06-18 | 1994-12-22 | Sps Schutzplanken Gmbh | Passive protection device for roadways, having a box-like beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| IT202100013904A1 (en) * | 2021-05-27 | 2022-11-27 | Anas S P A | SYSTEM FOR TESTING ROAD PROTECTION BARRIERS |
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