GB2125087A

GB2125087A - Drainage channel blocks

Info

Publication number: GB2125087A
Application number: GB08222835A
Authority: GB
Inventors: Terence Alan Ruston; Richard Geoffrey Fenwick
Original assignee: Charcon Products Ltd
Current assignee: Charcon Products Ltd
Priority date: 1982-08-07
Filing date: 1982-08-07
Publication date: 1984-02-29
Also published as: GB2125087B; EP0102746A1; DK359383A; DK359383D0

Description

GB 2 125 087 A 1

SPECIFICATION

Improvements in drainage blocks This invention is concerned with improvements in or relating to the manufacture of concrete or similar products and is particularly related to the 70 manufacture of drainage blocks.

A conventional form of drainage block has a substantially rectangular cross-section with a channel extending longitudinally therethrough, 10 the channel being open onto an upper face of the block through a line of slots extending longitudinally of the block. Such slots are susceptible to the accumulation. of dirt etc., and also, because of the provision of the slots, it is 15 necessary to cast the block, resulting in the production of a large and heavy structure for reasons of economy.

According to one aspect of the present invention there is provided a drainage member 20 having a drainage channel extending therethrough and opening onto one face of a base, means at said one face of the base for seating a plurality of cover parts across the channel opening, each of the cover parts being 25 provided with at least one recess whereby to form 90 a through slot for communicating with the channel when a pair of said cover parts are seated on the base and abut one another.

Preferably the cover parts are freely seated on 30 the base. The recess may be formed in a side of each cover part to form a slot extending paterally of the drainage channel.

Preferably also one of the recesses is formed in each side of each cover part whereby the recesses 35 of adjacent cover parts face one another to form 100 the respective slot.

According to a further aspect of the present invention there is provided a drainage component comprising a drainage channel extending 40 therethrough and opening onto one face thereof, 105 means at said one face for seating a further component across the channel opening, the component being formed of a pressed cementious material whereby to define a relatively lightweight 45 structure.

Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:Fig. 1 is an end elevation of a drainage member 115 according to one embodiment of thb invention; Fig. 2 is a perspective view of the drainage member of Fig. 1; Fig. 3 is a section of A-A of Fig. 1; 55 Fig. 4 is a perspective view of a further 120 embodiment of the invention; Fig. 5 is a part view showing an alternative to the Fig. 4 embodiment; and Fig. 6 is a further part view showing a further alternative to the Fig. 4 embodiment.

Referring to Figs. 1 to 3 of the drawings, a concrete drainage block 10 has a drainage channel 12 of part-circular cross-section extending longitudinally therethrough and 65 opening through a wide, straight-sided continuous longitudinal slot 14 onto an upper face 16 of the block 10. The upper face 16 is parallel with a lower face 18, the latter having a greater lateral dimension to give stability to the block. The sides of the block 10 are each defined by an inwardly angled section 20 and a vertical section 22 for the purpose hereinafter described. On each side of the slot 14 there is provided a recess in the upper face 16 defining a seat 24 for 75 the purpose hereinafter described.

As the slot 14 is unrestricted, the block 10 can be end pressed by a semidry process or a conventional wet process and can therefore be produced economically to be of a smaller size 80 than conventional blocks, thus defining a relatively lightweight structure which can be more easily handled and transported. A longitudinal through opening 26 is provided in the block 10 towards each lower corner thereof so as to further 85 reduce the weight of the block. On one end face of the block 10 there is formed a part-circular groove 28 around the respective end opening of the channel 12 and a sealing material can be located in the groove 28, whereby adjacent blocks 10 can be sealingly joined together around the aligned drainage channels 12.

The block 10 is adapted to seat a plurality of covers or taps 30 across the slot 14. Each of the taps 30 has a transverse dimension 95 corresponding to the transverse dimension of the block 10 at the vertical sections 22 but has, on its lower face, an inwardly turned shoulder defining a downwardly extending part 32, the ends of which locate in the seats 24 of the block 10 to position the top 30 thereon. Four of the tops 30 can be located side-by-side along the length of the block 10 in abutment with one another.

Each of the tops 30 has a recess 34 (Fig. 3) in each side and positioned centrally of the respective side. Each recess 34 has a maximum transverse dimension corresponding to the width of the slot 14, whereby to align vertically above the slot 14, and has side faces 36 inwardly angled towards one another, with the depth of the recess 110 34 increasing in a direction inwardly of the block 10. With reference to Fig. 3, the base of each recess 34, in a direction inwardly of the block 10, has a vertical section 38, an inwardly angled section 40, and a further vertical section 42. When adjacent blocks abut one another the respective recesses 34 face one another and effectively define a slot extending transversely of the channel 12 and flaring outwardly and downwardly so as to prevent blockage by dirt etc. Such a construction of the top 30 can be formed of pressed concrete and can be easily and economically produced.

When being positioned on site, the blocks 10 are laid end to end on a suitable base support 125 which may extend up to the top of the angled section 20 of the side walls. The blocks 10 are secured to the support by grouting or the like and any suitable elements, such as interlocking blocks, can be laid against the vertical sections 22 GB 2 125 087 A of the side walls and the ends of the tops 30. It is to be appreciated that it is possible for the tops to overlie the join between the adjacent blocks 10, as the tops 30 can be positioned as desired 5 once the blocks 10 have been laid to form the continuous channel 12.

In the embodiment of Fig. 4, the block 10 of suitable dimensions locates, within the seats 24, a rectangular frame 44, preferably formed of cast 10 iron, which has a lower]edge 46 so as to seat therein a lid 48, again preferably of cast iron.

Such a construction forms an inspection unit.

With such a unit, a groove 50 is formed along the internal edge of each seat 24 and is filled with 15 epoxy resin to secure the frame 44 in position.

A suitably dimensioned block 10 may be utilised to locate other components in the seats 24. For example there may be located a pressed steel grate 52 (Fig. 5) provided with transverse 20 slots, or a cast iron grate 54 (Fig. 6) again providdd with transverse slots. Each of the grates 52 or 54 is secured to the block 10 by the use of a threaded connecting member 56 passing hrough either a slot in the grate 52 or seated in a 25 recess in the grate 54, and engaging in an internally threaded hole provided in a clamp 58 which can be positioned longitudinally in the channel 12 but is so dimensioned that when moved through 901 it cannot be removed through 30 the slot 14 in the block 10.

It is preferred, as shown in the drawings, that 90 the upper edges of the block 10 and the tops 30 are chamfered and it is also envisaged that the tops 30 may be provided with a wire 35 reinforcement.

Various modifications may be made without departing from the invention. For example, the sides of the block 10 may have a configuration other than that shown and a sealing groove may 40 be formed in each end of the block. Also the configuration of the recesses 34 may be altered from that shown.

Claims

1. A drainage member having a drainage 45 channel extending therethrough and opening onto one face of a base, means at said one face of the base for seating a plurality of cover parts across the channel opening, each of the cover parts being provided with at least one recess whereby 50 to form a through slot for communicating with the channel when a pair of said cover parts are seated on the base and abut one another.

2. A drainage member according to claim 1, wherein the cover parts are freely seated on the 55 base.

3. A drainage member according to claim 1 or 2, wherein recess is formed in a side of each cover part to form a slot extending laterally of the drainage channel.

60

4. A drainage member according to claim 3, wherein one of the recesses is formed in each side of each cover part whereby the recesses of adjacent cover parts face one another to form the respective slot.

65

5. A drainage member according to any of the preceding claims, wherein the or each recess is so dimensioned that the width of the formed slot in creases in a direction towards the base.

6. A drainage member according to any of the 70 preceding claims, wherein each of the cover parts is formed of a cementitious material which is wire reinforced.

7. A drainage member according to any of the preceding claims, which is adapted to seat four of 75 the cover parts across the channel opening.

8. A drainage member according to any of the preceding claims, wherein the seating means comprises seats formed on said one face of the base adapted to co-operate with complementary 80 shoulders formed on each of the cover parts.

9. A drainage component comprising a drainage channel extending therethrough and opening onto one face thereof, means at said one face for seating a further component across the 85 channel opening, the drainage component being formed of a pressed cementitious material whereby to define a relatively lightweight structure.

10. A drainage component according to claim 9, wherein longitudinal apertures extend through the component so as to reduce the weight thereof.

11. A drainage component according to claim 9 or 10, wherein a sealing groove is formed on at least one end face around the respective end 95 opening of the channel.

12. A drainage component according to any of claims 9 to 11, wherein the lateral dimension of a face which is opposed to said one face and which is the lower face in use, is greater than the cor- 100 responding dimension of said one face so as to provide for stability.

13. A drainage component according to claim 12, wherein each side thereof comprises an inwardly angled section extending from said op- 105 posed face and a section which is substantially vertical in use and which extends between the inwardly angled section and said one face.

14. A drainage member according to any of claims 1 to 8, wherein the base comprises a 110 drainage component according to any of claims 9 to 13.

15. A drainage member substantially as hereinbefore described with reference to the accompanying drawings.

115 17. Any novel subject matter or combination including novel subject matter herein disclosed, whether or not within the scope of or relating to the same invention as any of the preceding claims.

Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1984. Published by the Patent Office, Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.

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