. Text-book on roads & pavements . so assists inkeeping the tile clear of sediment,, Art. 13. Stone Drains. In localities where stone suitable for such purposesexists along a roadway it is common and often econ-omical to use stone drains for purposes of under-drainage. DRAINAGE OF ROADS AND STREETS. 37 Blind Drains. For short lengths, where it is onlynecessary to provide a permeable path for a smallquantity of water to escape, blind drains may be consist of ditches cut into the soil and filled atbottom with fragments of stone, the trench thenfilled with earth. Care should be taken th
. Text-book on roads & pavements . so assists inkeeping the tile clear of sediment,, Art. 13. Stone Drains. In localities where stone suitable for such purposesexists along a roadway it is common and often econ-omical to use stone drains for purposes of under-drainage. DRAINAGE OF ROADS AND STREETS. 37 Blind Drains. For short lengths, where it is onlynecessary to provide a permeable path for a smallquantity of water to escape, blind drains may be consist of ditches cut into the soil and filled atbottom with fragments of stone, the trench thenfilled with earth. Care should be taken that the topof the stone is protected, so that the earth may notbe washed into the stone and stop the drain; a littlesmall-sized stone or gravel on top, or a light layer ofbrush or sod, to hold the earth until it has compacted,is useful. Such drains have frequently proven quiteefficient when used where the requirements are not toogreat. Box Drains. Where suitable stone is plenty andcheap, a box drain may be built. This consists of acu31924031255858. 50
Size: 1606px × 1555px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkwiley, books
