CN2516583Y - Bridge guardrail - Google Patents

Abstract

The utility model relates to a concrete guardrail for a highway bridge, composed of a plurality of corrugated stops provided on the impacting side of the guardrail based on the New Jersey type concrete guardrail, which is optimized by the theoretical analysis of shape data, numerical simulation and model test, and proved by the real vehicle impact test. The utility model has the advantages that effectively preventing the vehicle from tumbling outwards, inwards and running out of the way, improving the protection performance of the guardrail, reducing the construction and maintenance cost, and being a new highway bridge guardrail which can satisfy the current transportation condition and the standard requirements for safety evaluations in our country.

Description

A kind of Bridge guardrail

Technical field

The utility model relates to a kind of Bridge guardrail, particularly a kind of concrete guardrail that is used for bridge on highway.

Background technology

Along with the fast development of China's expressway construction, expressway construction begins to extend to mountain ridge hilling terrain, has built a lot of curved, slopes, skew bridge and Gao Dun, long-span bridge, and traffic safety is faced with severe situation.And the existing bridge on highway guardrail of China, its standard formulates with reference to foreign standard basically, can not satisfy the transportation condition that China changed and the requirement of safety standard.

The main type of Bridge guardrail has steel guard rail and concrete guardrail, but steel guard rail cost height, the maintenance costs height.The concrete guardrail form of domestic extensive employing at present mainly contains two kinds of New Jersey's type guardrail and combined type guard bars.There is two large problems in New Jersey's type guardrail, the one, under certain impact conditions, errant vehicle can climb up, cross or flare climbs over guardrail, the 2nd, when, body gravity higher when the speed of a motor vehicle is low, errant vehicle can be in guardrail side dumper.The domatic form of combined type concrete guardrail base is identical with New Jersey's type guardrail, different is to have added the steel pipe crossbeam at the guardrail top, its whole height increases simultaneously, but when vehicle will run off or outwards rout up guardrail, the steel pipe crossbeam on top is damaged easily, can not satisfy requirement of shelter, and maintenance costs is big.

The utility model content

The technical problems to be solved in the utility model is the shortcomings and deficiencies that exist in the above-mentioned prior art, for preventing that vehicle from turning up and run off, prevent that vehicle interior side from turning over, and provide a kind of novel high speed highway bridge guardrail that satisfies current transportation condition of China and safety evaluation standard-required.

The technical solution of the utility model is to adopt a kind of concrete guardrail that the face of hitting is met on two slopes that includes, what it is characterized in that it meets the face of hitting plays slope point apart from ground 750 millimeters, from the slope point upwards is domatic down, domatic angle of inclination is 55 degree down, from 255 millimeters vertically upward of slope points, the inside 180 millimeters places of level are knick point, from knick point upwards is last domatic, going up domatic angle of inclination is 84 degree, from 480 millimeters vertically upward of knick points, sloping point till inside 50 millimeters of the level, down domatic and last domatic radius is arranged is that 255 millimeters circular arc is excessive, ending slope, slope point upwards is 100 millimeters of vertical faces, climbs the retaining bank at the vertical plane terminal point to being provided with to the resistance of outer process between the end face of guardrail.

The utility model beneficial effect compared with prior art is that it is provided with the measure that the retaining bank is climbed in resistance by adopting on guardrail top, stops vehicle to cross guardrail effectively.Carry out parameter optimization by shape data theory analysis, numerical simulation and model experiment to guardrail, and through the full scale vehicle collision experimental verification, and the guard bar structure form of determining of the present utility model also can improve the protective ability of freeway guardrail, reduce construction costs, save maintenance costs.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Wherein: 1-plays sloping point; Domatic under the 2-; The 3-knick point; 4-is last domatic; 5-ends sloping point; The retaining bank is climbed in the 6-resistance; The starting point of retaining bank is climbed in the 7-resistance; 8-guardrail front end of the top surface point; 9-guardrail end face aft terminal; 10-ground; 11-guardrail root; The 12-bridge flange plate.

The specific embodiment

As shown in Figure 1, the utility model adopts a kind of concrete guardrail that the face of hitting is met on two slopes that includes, it is characterized in that 10 vertical distance is 750 millimeters to its slope point 1 of rising of meeting the face of hitting to ground, upwards be down domatic 2 from slope point 1, domatic 2 angle of inclination is 55 degree down, from slope point 1 255 millimeters vertically upward, the inside 180 millimeters places of level are knick point 3, from knick point 3 upwards is last domatic 4, upward domatic 4 angle of inclination is 84 degree, from 480 millimeters vertically upward of knick points 2, slope point 5 till inside 50 millimeters of the level, down domatic 2 and last domatic 4 radius is arranged is that 255 millimeters circular arc is excessive, ending slope point 5 upwards is 100 millimeters vertical planes, climbs retaining bank 6 at the vertical plane terminal point to being provided with between the end face of guardrail to the resistance of outer process.Starting point to the vertical distance of guardrail end face of climbing retaining bank 6 from resistance is 100 millimeters, it is 50 millimeters to the maximum horizontal range of outer process that retaining bank 6 is climbed in resistance, the projection top is that radius is 35 millimeters a circular arc, climbing the retaining starting point 7 of bank and guardrail front end of the top surface point 8 from resistance has straight line and this circular arc tangent respectively, forms this guardrail and climbs to the resistance of outer process and keep off bank 6.Radius is arranged is 25 millimeters circular arc lead angle at the slope point 1 that rises of guardrail.The ground level of guardrail is 1010 millimeters, and top width is 170 millimeters, from guardrail end face aft terminal 9 downward 350 millimeters to guardrail root 11, have inside 20 millimeters recessedly, the bottom width of guardrail is 380 millimeters.The guardrail root is high 160 millimeters, joins with bridge flange plate 12.

Claims (5)

1, a kind of Bridge guardrail, it is a kind of concrete guardrail that the face of hitting is met on two slopes that includes, what it is characterized in that it meets the face of hitting plays sloping point (1) apart from ground 750 millimeters, upwards be domatic (2) down from slope point, domatic angle of inclination is 55 degree down, from 255 millimeters vertically upward of slope points, the inside 180 millimeters places of level are knick point (3), upwards be last domatic (4) from knick point, going up domatic angle of inclination is 84 degree, from 480 millimeters vertically upward of knick points, sloping point (5) till inside 50 millimeters of the level, down domatic and last domatic radius is arranged is that 255 millimeters circular arc is excessive, from ending the slope point upwards is 100 millimeters of vertical faces, climbs retaining bank (6) at the vertical plane terminal point to being provided with between the end face of guardrail to the resistance of outer process.

2, a kind of Bridge guardrail according to claim 1, starting point to the vertical distance of guardrail end face that it is characterized in that climbing from resistance the retaining bank is 100 millimeters, it is 50 millimeters to the maximum horizontal range of outer process that the retaining bank is climbed in resistance, the projection top is that radius is 35 millimeters a circular arc, climbing the retaining starting point (7) of bank and guardrail front end of the top surface point (8) from resistance has straight line and this circular arc tangent respectively, forms this guardrail and climbs to the resistance of outer process and keep off bank (6).

3, a kind of Bridge guardrail according to claim 1 is characterized in that radius is arranged is 25 millimeters circular arc lead angle for the sloping point (1) that rises at guardrail.

4, according to the described a kind of Bridge guardrail of arbitrary claim in the claim 1～3, the ground level that it is characterized in that guardrail is 1010 millimeters, top width is 170 millimeters, from guardrail end face aft terminal (9) downward 350 millimeters to guardrail root (11), have inside 20 millimeters recessedly, the bottom width of guardrail is 380 millimeters.

5, a kind of Bridge guardrail according to claim 4 is characterized in that guardrail root (11) is high 160 millimeters, joins with bridge flange plate (12).

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