FR2842275A1 - Inlet for run-off water drain comprises prefabricated concrete tube which supports grille and has lower side forming connection for top of pipe or resting on top of concrete drain pipe - Google Patents

Abstract

The inlet for a run-off water drain comprises a prefabricated concrete tube (1) which supports a grille (5). Its lower side (6) forms a connection for the top of a pipe or rests on the top of a concrete drain pipe (7).

Description

The present invention relates to a prefabricated concrete tubular element

  usable for example to make runoff water collection networks, more particularly by constituting a support for a cast iron drain. In the construction of runoff water collection networks, the connection of the underground network to the surface runoff drainage channels, such as gutters, is particularly delicate. In fact, currently, the sections of conduits which will extend between the surface channels and the underground network and support the gullies so that they open into the surface channels are produced directly on the site by pouring concrete into concrete. formwork. This is sometimes made difficult because of the relative positions of the surface channels and the underground network and in particular of

  the inclination of the surface canals relative to the underground network, also due to climatic conditions or the nature of the terrain.

  It would therefore be interesting to have a means allowing a simple way to connect an underground network for collecting runoff water to a canal.

evacuation surface.

  According to the invention, provision is made for a prefabricated concrete tubular element having a first end arranged to support an extending grid. transversely to the tubular element and, opposite, a second end arranged to rest on the ground and to define a housing for a pipe end coaxially with the tubular element or to rest on a face

  terminal of a prefabricated concrete conduit.

  Thus, the tubular element of the invention makes it possible to make a connection on the site so

particularly simple and easy.

  Preferably, the first end of the element

  tubular is internally shaped like a funnel.

  The tubular element can then support a grid delimiting a large opening while being rac5 corded to a duct of smaller section than this opening. This avoids the use of grids,

  higher costs, incorporating such a funnel.

  Advantageously, the first end is provided internally with an end housing having a polygonal section or the first end has an end face at the periphery of which is formed a

  grid positioning rebate.

  Maintaining the grid position on

  the tubular element is thus firmly secured.

  According to a particular characteristic of the mention, the first end has a terminal face in which are formed two notches for receiving

  ends of a grid support beam.

  It is then possible to use large grids, the beam resting on the tubular element limiting the risks that the grid yields a load as under the weight of a vehicle including a wheel

would rest on the grid.

  According to a particular embodiment, the second end is provided with positioning means with respect to the prefabricated concrete conduit: preferably the positioning means include a relief formed on the second end to cooperate with a relief formed in correspondence on the prefabricated conduit concrete and the positioning means are arranged to allow the tubular element to pivot relative to the conduit along a central axis of

the tubular element.

  The position of the tubular element on the precast concrete duct can then be easily adapted to

  different configurations of the surface channels.

  Other characteristics and advantages will emerge on reading the following description of modes of

  particular non-limiting embodiment of the invention.

  Reference will be made to the accompanying drawings, in which: - Figure 1 is an exploded view of an assembly for connecting an underground network to a surface channel, using a prefabricated tubular element according to a first embodiment of the invention, - Figure 2 is a perspective view of this prefabricated tubular element, - Figure 3 is a perspective view of a prefabricated tubular element according to a second embodiment of the invention, - Figure 4 is a view in section of a connection made with this prefabricated tubular element, - Figure 5 is a sectional view of a connection made with a prefabricated tubular element according to a variant of the second embodiment, - Figure 6 is a sectional view with exploded view of a connection assembly using a prefabricated tubular element according to a third embodiment

of the invention.

  With reference to FIGS. 1 and 2, the prefabricated tubular element according to the first embodiment of the invention, generally designated at 1, delimits an internal channel 2 with a central axis 3 and comprises, for a vertical position of the axis central 3, an upper end 4 arranged to support a grid 5 and a lower end 6 arranged to rest on a duct

7 precast concrete.

  The upper end 2 has an end face 8 on which the internal channel 2 opens out by a chamfered portion 9. The end face 8 is of planar shape to form a support for a flange of the

grid 5.

  The lower end 6 has an end face 10 at which the internal channel 2 opens out. The end face 10 is of planar shape to rest on the upper end of the duct 7 and has a peripheral rim projecting therefrom.

  the tubular element 1 on the conduit 7.

  The end faces 8, 10 are here perpendicular to the central axis 3.

  The tubular element 1, here of cylindrical shape with circular sections, has an external surface 12 in the upper part of which are formed flats 13.

  The tubular element 1 is produced according to conventional techniques for manufacturing precast concrete elements.

  In the example illustrated in Figure 1, all

  for connecting a gutter to an underground network com20 takes a prefabricated concrete connection box 14.

  The connection box 14 is open at its upper end and has in its lower part orifices 15 closed by sails 16. The connection box 14 is disposed in a pit made in the ground into which the conduits of the underground network open. The sails 16 are broken to allow the connection of the conduits of the underground network to the box of

  connection 14 via ports 15.

  The conduit 7, which here forms an extension, is installed and sealed on the upper end of the housing

connection 14.

  The tubular element 1 is then placed on the upper end of the conduit 7. It will be noted that the external surface of the conduit 7 and the peripheral rim there

  both being cylindrical in shape with circular cross-section

  laire, the tubular element 1 can be oriented relative to the duct 7 by pivoting about the central axis

3 before being sealed.

  The prefabricated elements forming the gutter, for example curbs are then arranged in such a way that their ends come to bear

flats 13.

  The grid 5 is then placed on the upper end 4 of the tubular element 1. The grid 5 comprises a frustoconical wall which is introduced into the portion

  chamfered 9 and internal channel 2.

  With reference to FIGS. 3 and 4, the tubular element according to the second embodiment of the invention, generally designated at 21, defines an internal ca15 nal 22 with a central axis 23 and comprises, for a vertical position of the axis central 23, an upper end 24 arranged to support a grid 25 and a lower end 26 arranged to rest on the ground and receive one end of a pipe 27 made of

plastic.

  The upper end 24 has an end face 28 on which the internal channel 22 opens out through a funnel portion 29. The end face 28 is planar

  and here perpendicular to the central axis 3.

  The lower end 26 has a plane end face 30 perpendicular to the central axis 23.

  The tubular element 21 according to the second embodiment is placed on the upper end of the pipe 27 buried vertically. The terminal face 30 of the lower end 26 then rests on the protruding portion of the ground 31 from which extends the upper end of the pipe 27. The upper end of the pipe 27 is then received in the internal channel 22 (whose diameter is slightly greater than the internal diameter of the pipe 27) and the connection between the pipe 27 and the internal channel 22 is sealed by means of a cord 32 of silicone gel. It is noted that the tubular element 21 does not bear on

  the end of the pipe 27 so as not to deter5 it.

  In the variant of FIG. 5, the end face 30 of the lower end 26 is provided with a flat groove 33 for receiving and positioning the end

  upper part of a precast concrete duct 34.

  With reference to FIG. 6, the tubular element according to the third embodiment, generally designated at 41, has a rectangular cross section and delimits an internal channel 42 with a central axis 43. For a vertical position of the central axis 43 , the tu15 bular element 41 has an upper end 44 arranged to support a grid 45 and a lower end

  46 arranged to rest on a prefabricated concrete conduit 47 also of rectangular section.

  The upper end 44 has a terminal face 48 divided into a portion 48.1 perpendicular to the central axis 43 and a portion 48.2 forming an obtuse angle with the portion 48.1. The portions 48.1 and 48.2 are thus arranged to cooperate with corresponding portions of the grid 45. The portion 48.1 has a peripheral rabbet 49 to accommodate a rim of the corresponding portion of the grid 45. The portion 48.2 is in offset from the portion 48.1 and has near the portion 48.1 two notches 50 for accommodating opposite ends of a beam

51 for supporting the grid 45.

  The lower end 46 has an end face 52 in which a flat groove 53 is formed to receive a bead projecting from a

  end face of the upper end of the conduit 47.

  The installation of the connection assembly is similar to that described in the context of the first embodiment. The connection assembly comprises a connection box, open at its upper end, and which has an upper orifice 56 closed by a veil 57 and lower orifices 58 facing each other closed by veils 59. Grooves 60 are formed from the upper end in two opposite sides of the connection box 55 to accommodate opposite edges, a plate so that the plate extends opposite the upper orifice. A siphon is thus formed in the

connection box 54.

  The duct 47 is then mounted on the upper end of the connection box 55. The lower end of the duct 47 and the upper end of the connection box have reliefs of complementary shape allowing positioning of the

  conduit with respect to the connection box 55.

  The tubular element 41 is then mounted on the upper end of the conduit 47 so that the bead 54 is received in the flat groove 53 of

the tubular element 41.

  The grid 45 is then mounted on the upper end of the tubular element 41, the ends of

  the beam being introduced into the notches 50.

  Of course, the invention is not limited to the embodiments described but on the contrary covers all variants coming within the scope of the invention

  as defined in the claims.

  In particular, the tubular element can have other shapes than those described. Thus, the tubular element may have an upper end defining a polygonal housing for receiving a grid having

  itself a circular or polygonal section.

  By grid will be understood any styling device

  the tubular element for partially closing said element

  while allowing the passage of rainwater:

  that is to say a drain, a mouth or the like.

  Furthermore, the tubular element may have other shapes than that described in particular depending on the configuration of the connection to be made.

Claims (10)

  1. Precast concrete tubular element (1,2,41) having a first end (4,24,44) arranged to support a grid (5,25,45) extending transversely to the tubular element and, at the 'opposite, a second end (6,26,46) arranged to rest on the ground and define a housing for a pipe end (27) coaxially with the tubular member or to rest on a terminal face of a prefabricated conduit in concrete (7,24,47).   2. Tubular element according to claim 1, characterized in that the first end (24) of the tubular element (21) is internally shaped in funnel (29).   3. Tubular element according to claim 1 or claim 2, characterized in that the first end (4) is provided internally with a housing   end having a polygonal section.   4. Tubular element according to any one of   previous claims, characterized in that the first end (44) has a peripheral rebate   (49) for positioning the grid (45).   5. Tubular element according to any one of   previous claims, characterized in that the first end (44) has an end face (48) in   which are formed two notches (50) for receiving the ends of a beam (51) for supporting the grid. 6. Tubular element according to any one of   previous claims, characterized in that the first end (46) has an end face (48) having a first portion (48. 1) which is substantially   orthogonal to the central axis (43) of the tubular element   (41) and a second portion (48.2) which is unhooked   relative to the first portion and forms an angle   obtuse compared to the first portion.   7. Tubular element according to any one of   previous claims, characterized in that the   second end (6,26,46) is provided with positioning means relative to the precast concrete duct (7,34,47).   8. Tubular element according to claim 7,   characterized in that the positioning means com10 take a relief (11,33,53) formed on the second end (6,26,46) to cooperate with a relief (54) formed in correspondence on the prefabricated concrete pipe.   9. Characterized in that the positioning means are arranged to allow the tubular element (1) to pivot relative to the conduit (7) according to   a central axis (3) of the tubular element (1).   10. Tubular element according to any one of   previous claims, characterized in that it has a substantially cylindrical external surface (12)   on a portion of which was made at least one flat (13) to serve as support for a member intended to   extend perpendicular to the tubular member.