RU2297486C1 - Collapsible motor road paving - Google Patents

Abstract

FIELD: road building, particularly motor road paving made of prefabricated single units.

SUBSTANCE: motor road paving comprises panels with curvilinear edges. The panel edges are non-symmetric with respect to panel axis. The curvilinear edges define arc of circle having radius equal to r=(1.003÷1.01)·c, where c is half of traffic lane width. Circle center is located on panel axis and spaced a distance from panel edge. The distance is equal to a=(r²-0.25b₀)^0.5, where b₀ is distance between road tracks. The curvilinear edges are convex at the first panel end and concave at another panel end. Concave edge is provided with spike. Convex edge has slot extending from convex edge along outer panel side for distance z=c·L/R_min, where R_min is minimal arch radius in plane.

EFFECT: increased traffic capacity and service performance and extended range of collapsible paving components usage.

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Description

The invention relates to road construction, namely to collapsible coatings of roads.

Known collapsible road cover made of panels, the ends of which have a curved shape, convex on one of the ends and concave on the other, and the convex end has a spike and a concave - groove. The spikes and grooves provide the connection of the shields in the wheel drive, and the curved ends - the turns of the shields relative to each other, which allows you to form curved wheel guides on the curves in the plan (see ed. Certificate of the USSR No. 372309, M. class. E01C 5/14, 01.03. 1973. Bull. No. 13).

The disadvantage of such a collapsible coating is that when it is used on the curves, the length of the contact zone of the stud with the groove is reduced, resulting in a decrease in the reliability of the structure. In addition, the protruding ends of the concave curved end face cut by the groove are not strong enough for the radius of the end curve close to the half-width of the shield, which forces these radii to increase, and this leads to a mutual displacement of the riding surfaces of the mating shields when laying on the curves, and therefore to a reduction the width of the axle in the joint zone. As a result, the transport and operational qualities of the coating are reduced.

The closest in technical essence to the proposed one is a collapsible road cover made of boards, the ends of which have a curved shape, convex on one of the ends and concave on the other, the ends are outlined in an arc of a circle with a radius r equal to r = (1,005 ÷ 1.01) b, where b is the half-width of the shield; the concave end face is provided with a spike, and a convex groove, the groove being elongated on both sides of the convex end along the side faces of the shield by a distance z equal to

z = bL / R _min ,

where L is the length of the shield; R _min - the minimum radius of the axle of the axle (see US Pat. RF No. 2260645, IPC 7 ЕСС 9/02, 5/14, 09/20/2005. Bull. No. 26).

The disadvantage of such a collapsible coating is that it does not provide compensation for the broadening of the transverse seams in the outer wheel drive in the sections of the curves in the plan, as a result of this, in the section of the curve in the plan of the lengths of the inner and outer gears will be the same, that is, a shortage of the length of the outer gears is formed, which leads to the spread of the transverse seams and the reduction of the width of the lane, and consequently, to a decrease in the transport and operational qualities of the road surface. These shortcomings can be avoided in two ways: the first is the use of shields for the external wheel drive that have a large length, which depends on the radius of the curve in the plan, the drawback of this method is that it is necessary to produce shields of different lengths for the curves in the plan and straight sections, which makes the design not universal; the second is the broadening of transverse welds in the external wheel drive, the disadvantages of this method: it is necessary to fill the broadened joints with deformable and wear-resistant materials, the contact conditions of the shields in the wheel drive are worsened, the rigidity of the butt joints is reduced, and the transport and operational qualities of the road surface are worsened.

The problem to which the invention is directed is to improve the transport and operational qualities of a collapsible road cover and the versatility of its portable elements.

To solve this problem, in a collapsible covering of a road made of panels, the ends of which have a curved shape, convex on one of the ends and concave on the other, the concave end is provided with a spike, and a convex groove elongated along the outer side face of the shield, according to the invention the ends are outlined asymmetrically with respect to the shield axis along an arc of a circle with a radius r equal to r = (1.003 ÷ 1.01) s (c is the half-width of the lane) and a center located on the axis of the lane at a distance a from the end, measured along the axis of the lane and equal

where b ₀ is the width of the track gauge;

the groove is elongated from the convex end along the outer side face of the shield by a distance z equal to

z = bL / R _min ,

where L is the length of the shield;

R _min - the minimum radius of the curve in the plan.

Figure 1 shows a shield collapsible coating of the road, side view. Figure 2 shows a shield collapsible coating of the road, top view. Figure 3 shows a section aa in figure 2. Figure 4 shows the connection of adjacent panels when laying on a straight section of the path. Figure 5 shows the connection of adjacent shields when laying on a curve in the plan.

The shield has the basic geometric parameters: length L, width B, radius of the curve that defines the ends r = (1.003 ÷ 1.01) s, the distance a from the end to the center of the curve is O ₁ or O ₂ , which defines the ends, measured along the axis of the lane, includes a body 1, having ends that are outlined asymmetrically with respect to the axis of the shield along an arc of a circle, 2 ends with a groove 4 and concave 3 with a spike 5, an inner end located closer to the center of the curve that defines the end face, a side face 6 and an outer end located further from the center of the curve that defines the end face, side face 7.

When laying the shields in the wheel drive, the convex end 2 of the shield is combined with the concave end 3 of the adjacent shield, while the spike 5 of the concave end 3 is inserted into the groove 4 of the convex end 2. Wooden plugs made according to the size of the free cavities are laid in the free cavities of the groove. The shields in the adjacent wheels in the traffic lane are laid by the inner side faces 6 to each other so that the centers of the O ₁ (O ₂ ) curves outlining the ends of the shields coincide.

The proposed design of collapsible coating provides the possibility of laying it both on straight sections of the track and on curved sections with a radius of at least R _min equal to

R _min = cL / z,

where c is the half-width of the lane;

L is the length of the shield;

z is the distance of the elongation of the groove from the convex end of the shield along its outer lateral face.

The shape and dimensions of the curved ends asymmetric with respect to the axis of the shield, defined by the radius r = (1.003 ÷ 1.01) with and the position of the center of the curve outlining the ends determined by parameter a, provide rotation of the connected boards by connecting the spike-groove relative to each other by 9 ÷ 16 ° with mutual displacement of the ends of adjacent boards in the joint zone (0.06 ÷ 0.08) B. Due to the fact that the ends are outlined asymmetrically with respect to the axis of the shield and the center of the curve outlining these ends is located on the axis of the lane, in the sections of the curves in the plan when turning the shields laid in the wheel guide, with convex ends relative to each other from the axis of the lane, and concave to the axis lanes there is an elongation of the axle due to the displacement of the convex ends to the outside. When turning the shields laid in the wheel drive with respect to each other with convex ends to the axis of the lane, and concave from the axis of the lane, the shortening of the wheel occurs due to the displacement of the convex ends into the lane. Thus, if the shields in the busbars of the lane are laid by the inner side faces to each other so that the centers of the curves outlining their ends coincide, then on the curve in plan, when the shields of both wheels are turned in the same direction, the external gear will be lengthened, and the internal it is shortened, and thus the length of the wheel drive lanes on the curve in the plan will be different, and the external wheel drive will be longer and the internal shorter. This eliminates the shortage of the length of the external wheel drive, and therefore, the spacing of the transverse seams and rapprochement of the wheel drive after the curve, resulting in increased transport and operational qualities of a collapsible coating. For the proposed design of a collapsible coating, it is not necessary to manufacture elongated plates for external curved lines in the plan and special measures to compensate for the broadening of transverse joints in the external wheel circuits, which makes it universal (the possibility of using boards of the same length both on straight sections of the plan and on roundings )

Claims (1)

A collapsible road cover made of panels, the ends of which have a curved outline, convex on one of the ends and concave on the other, the concave end is provided with a spike, and convex - with a groove elongated along the outer side of the shield, characterized in that the curved ends are outlined asymmetrically relative to the axis of the shield along an arc of a circle with a radius r = (1.003 ÷ 1.01) s, where c is the half-width of the lane; and a center located on the axis of the lane at a distance a from the end, measured along the axis of the lane and equal to

where b ₀ is the width of the track gauge; the groove is elongated from the convex end along the outer side face of the shield by a distance z equal to z = cL / R _min , where L is the length of the shield; R _min - the minimum radius of the curve in the plan.

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