FR2874391A1 - Crash barrier module for motor vehicle, has self-supporting block including base and head disposed above base, which is more prominent with respect to head from side of one longitudinal flange than from side of another flange - Google Patents

Abstract

The module has an elongated-shaped self-supporting block (3) including a base (19) contacting with ground and a head (21) disposed above the base, where the base is broader than the head. The self-supporting block presents two opposite longitudinal flanges (15, 17). The base is more prominent with respect to the head, in a transversal direction of the block, from the side of the flange (17) than from the side of the flange (15). An independent claim is also included for a crash barrier including several modules disposed end to end and fixed to each other.

Description

2874391 1

  The present invention relates to a guardrail module for delimiting a traffic lane for motor vehicles, the module comprising a self-supporting block of generally elongated shape comprising, when the module rests on the ground in an erect position, a base in contact with the vehicle. floor, and a head located above the base, the block having a first longitudinal flank and a second opposite longitudinal flank, the base being wider than the head.

  To form a protective barrier or guardrail along a traffic lane for a motor vehicle, several of these modules are assembled end to end.

  These modules are particularly used on construction sites to form a protective separation between a traffic lane and the construction site and delimit the traffic lane.

  To fulfill its protective role, such a slide must be relatively impassable for vehicles traveling on the track along the site, and the legislation tends to impose increasingly severe constraints on the impact resistance of such slides.

  To meet these constraints, the modules must each have, in particular, relatively high stability.

  In addition, the modules are moved regularly from one site to another, or according to the evolution of the site.

  Therefore, it is preferable to have modules with a reduced weight and dimensions to facilitate their transport.

  Document FR-A-2 783 534 describes a safety slide module comprising a concrete block having a transverse profile converging upwards and symmetrical with respect to a median vertical plane.

  2874391 2 However, this module is bulky and has a high weight.

  It is an object of the present invention to provide a guardrail module having satisfactory strength and stability while having reduced bulk and weight.

  To this end, the subject of the invention is a safety slide module of the aforementioned type, characterized in that the base is more prominent with respect to the head, in the transverse direction of the block, on the side of the second longitudinal flank than the side of the first longitudinal flank.

  According to particular embodiments, the module comprises one or more of the following characteristics, taken in isolation or in any technically possible combination: the first longitudinal flank has a substantially vertical lower portion; - The lower portion extends over a height equal to or greater than 20 cm, in particular equal to or greater than 30 cm; - The lower portion extends over a height equal to or greater than 40 cm, in particular equal to or greater than 50 cm; - the lower portion extends down to the ground; the first longitudinal flank is substantially vertical to an apex of the block; the second longitudinal flank has a generally concave shape, with, at the level of the base, a portion of inclination, with respect to the vertical, greater than that of the head; the module comprises, at the longitudinal ends of the block, fastening inserts on another module, the inserts being embedded in the block; 2874391 3 - the first longitudinal sidewall is intended to be oriented towards the traffic lane.

  The invention also relates to a guardrail comprising a plurality of modules as defined above arranged end to end and fixed to each other.

  The invention will be better understood from the description which follows, given solely by way of example, and with reference to the accompanying drawings, in which - Figure 1 is a perspective view of a module of safety barrier according to the invention; FIG. 2 is an end view of the module of FIG. 1 illustrating the transverse profile of the module; FIG. 3 is a view from above and in section of a longitudinal end of the module of FIG. 1, illustrating the connection of this module with another identical module; and FIG. 4 is a side elevational view of the module of FIG. 1.

  Figure 1 shows a module 1 of guardrail which rests on the ground in an erect position, in which it must be arranged to form a guardrail.

  In all that follows, the terms lower, upper, top, bottom, top, bottom, vertical and horizontal refer to this position of module 1.

  The module 1 consists of a self-supporting block 3 made of reinforced concrete, which is generally elongated prismatic shape along a horizontal axis D horizontal, and which is equipped at its longitudinal ends with connecting elements 4 which will be described later.

  Block 3 has a front face 7 and an opposite rear face 9, a lower bearing surface 11, and a top 13. The surface 11 and the top 13 are flat and horizontal and generally rectangular in shape.

  Block 3 has a first longitudinal flank 15 and a second longitudinal flank 17 opposite.

  More specifically, the block 3 consists of a lower part or base 19 resting on the ground by the bearing surface 11, surmounted by an upper part or head 21.

  The base 19 is generally wider than the head 21, to provide a larger bearing surface 11 and to increase the transverse stability of the block 3.

  In particular, and as can be seen more clearly in FIG. 2, the bearing surface 11 has a width L that is clearly greater than the width I of the apex 13.

  The transverse profile of the block 3 converges upwards. This transverse profile comprises successively, from the bottom to the top, a rectangle 20 of width L 345 cm and height 10 cm, a first rectangle trapezoid 22 of 25 cm in height and whose small base measures about 24 cm, and a second trapezium isosceles 23 40 cm high and whose small base has a width 1 of 20 cm.

  Thus, the total height H of the block 3 is about 75 cm. Moreover, its total length is about 4 m.

  The rectangle 20 and the rectangle trapezium 22 form the base 19, and the isosceles trapezoid 23 forms the head 21.

  The base 19 is protruding transversely, with respect to the head 21, only on the side of the second longitudinal flank 17. The first longitudinal flank 15 and the second longitudinal flank 17 therefore have different profiles.

  The first longitudinal flank 15 is substantially flat and vertical over its entire height. More specifically, the first longitudinal flank 2874391 5 comprises a lower portion 24 flat and substantially vertical, and an upper portion 25 slightly inclined.

  The lower portion 24 extends from the surface 11 substantially over the height of the base 19, that is to say over a height h of about 35 cm. The upper portion 25 extends between the lower portion 24 and the top 13.

  The second longitudinal flank 17 has a profile of generally concave shape and comprises from top to bottom: an upper portion 26 corresponding to the head 21 and slightly inclined relative to the vertical, an intermediate portion 27 of greater inclination relative to the vertical and corresponding to the trapezoidal portion 22 of the base 19, and a lower portion 28 vertical corresponding to the rectangular portion 20 of the base 19.

  The base 19 is thus provided with a support heel 29 which is prominent on the side of the second longitudinal flank 17, while it lacks such a prominence or such a support heel on the side of the first side. longitudinal 15.

  If we consider a median longitudinal plane P of the vertex 13, that is to say a vertical plane perpendicular to the plane of Figure 2 and passing through the middle of the vertex 13, the profile of the block 3 is asymmetrical with respect to this plane medial longitudinal.

  In particular, considering that the median longitudinal plane P divides the section of the block 3 into two zones, the area of the zone of the cross section of the block 3 situated on the side of the second longitudinal flank 17 is greater than the area of the cross sectional area of the block 3 located on the side of the first longitudinal flank 15.

  More generally, it is noted that the base 19 is asymmetrical with respect to the head 21, and is wider transversely on the side of the second longitudinal flank 17 than on the side of the first longitudinal flank 15.

  The base 19 is in other words offset laterally with respect to the head 21 on the side of the second longitudinal flank 17.

  Returning to Figure 1, the module 1 comprises at the front face 7 and the rear face 9 of the connecting elements 4 by interlocking.

  The connecting elements 4 and their arrangement in the block 3 are similar. Only a connecting element 4, placed on the side of the front face 7, will be described in detail.

  As shown in FIG. 3, the connecting element 4 is in the form of a metal insert embedded in the block 3, for example during the molding of the block 3.

  The connecting element 4 comprises a female interlocking member 5 in the form of a C-shaped metal profile oriented vertically, that is to say perpendicular to the plane of FIG. 3.

  The female member 5 has a slot 30 opening on the front face 7 of the block 3.

  The connecting element 4 also comprises a vertical reinforcement lining 31 fixed on the female member 5. The lining 31 is in the form of two vertical plates 32 welded by vertical beads 33 on outer faces of the female member 5. The plates 32 extend transversely outwards on either side of the slot 30. The plates 32 do not block or limit the dimensions of the slot 30. They are flush with the front face 7.

  Corrugated concrete reinforcing bars 34, also visible in FIG. 4, are welded to inner faces of the female member 5.

  As illustrated in FIG. 4, the module 1 also comprises longitudinal reinforcing bars 35 arranged between the connecting elements 4. The longitudinal reinforcing bars 35 are fixed at their ends 2874391 7 to flanges 36 welded to the inside faces of the members females 5.

  To make a guardrail along a motor vehicle traffic lane, a plurality of modules identical to the module 1 are arranged end to end.

  As illustrated in FIG. 3, the female member 5 of the module 1 comes opposite a female member 5 of another module 37 arranged end-to-end with the module 1. The slots 30 of the female members 5 of the modules 1, 37 are aligned.

  The removable attachment of the modules 1, 37 between them is provided by means of a male connecting member 38 without the form of an I-shaped section vertically fitted into the female members 5, so that the central core 39 of the male member 38 is disposed in the slots 30 of the female members 5 and that the transverse webs 40 of the male member 38 are received in the interior spaces formed in the female members 5.

  Returning to Figure 1, a guardrail formed of a plurality of modules is arranged for example along a construction site and forms a separation between the site and a traffic lane for motor vehicles.

  The slide thus produced has a transverse profile which is that of the modules that constitute it.

  Each module 1 forming the slideway is arranged so that its first longitudinal flank 15 is oriented on the side of the taxiway V for motor vehicles (Figure 2).

  Because of its base 19 offset on the side of the second sidewall 17, that is to say on the opposite side to the traffic lane, the module 1 has on the side of this lane a small footprint, particularly in lower part of the module 1, with respect to a module which comprises a base provided on each side of a heel 29.

  Therefore, it is possible to provide a wider traffic lane for vehicles or shift the module to the taxiway to provide more space for the site.

  The transport of modules 1 side by side on trucks is facilitated, which reduces transport costs, especially as each module 1 has a reduced weight.

  The mechanical strength of the block 3 and its stability in the event of impact of a motor vehicle on the first longitudinal flank 15 are satisfactory.

  Indeed, the heel 29 of the base 19 located on the side opposite to an impact on the module 1 gives sufficient stability to the module 1. Moreover, the vertical portion 22 of the first longitudinal flank 15 prevents a vehicle from impact module 1 does not climb on it and is raised, unlike the case where the module would present on the side of the taxiway, in the lower part, an inclined surface.

  In order to prevent a vehicle from climbing on the block 3, the vertical portion 24 extends over a height preferably equal to or greater than the height of the horizontal axis of rotation of the motor vehicle wheels.

  For example, the vertical face 24 extends over a height greater than 20 cm, especially greater than 30 cm, and preferably greater than 35 cm. Higher heights, for example greater than 40 cm, and especially greater than 50 cm, can be envisaged to provide satisfactory protection for vehicles with high ground clearance, such as 4x4 vehicles and trucks.

  In a variant, the first longitudinal flank 15 is vertical over its entire height.

  In a variant, the base 19 has, with respect to the head 21, a prominence on the side of the first sidewall 15, but this prominence is less important than on the side of the second sidewall 17.

  The invention also applies to the guardrails 5 permanently arranged along a traffic lane and comprising modules which are fixed, for example sealed, to each other.

Claims (10)

  1. A guardrail module for delimiting a traffic lane for motor vehicles, the module comprising a self-supporting block (3) of generally elongated shape comprising, when the module rests on the ground in an erect position, a base (19) made of contact with the ground and a head (21) located above the base (19), the block (3) having a first longitudinal flank (15) and a second longitudinal flank (17) opposite, the base (19) being wider than the head (21), characterized in that the base (19) is more prominent with respect to the head (21), in the transverse direction of the block, on the side of the second longitudinal flank (17) than on the side of the first longitudinal flank (15).   2. Module according to claim 1, characterized in that the first longitudinal flank (15) has a lower portion (22) substantially vertical.   3. Module according to claim 2, characterized in that the lower portion (24) extends over a height equal to or greater than 20 cm, in particular equal to or greater than 30 cm.   4. Module according to claim 2, characterized in that the lower portion (24) extends over a height equal to or greater than 40 cm, in particular equal to or greater than 50 cm.   5. Module according to any one of claims 2 to 4, characterized in that the lower portion (24) extends downwards to the ground.   2874391 11 6. Module according to any one of claims 2 to 5, characterized in that the first longitudinal flank (15) is substantially vertical to a vertex (13) of the block (3).   7. Module according to any one of claims 2 to 6, characterized in that the second longitudinal flank (17) has a generally concave shape, with, at the base (19), a portion (27) of inclination , relative to the vertical, greater than that of the head (21).   8. Module according to any one of the preceding claims, characterized in that the module comprises at the longitudinal ends of the block (3) inserts (4) for attachment to another module, the inserts (4) being embedded in the block ( 3).   9. Module according to any one of the preceding claims, characterized in that the first longitudinal flank is intended to be oriented towards the taxiway (V).   10. Safety guard consisting of a plurality of modules arranged end to end and fixed to each other, characterized in that the modules (1, 37) are modules according to any one of the preceding claims.