Transcription of CHAPTER 10 DRAINAGE - SANRAL
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CHAPTER 10 DRAINAGE - SANRAL
DRAINAGE . CHAPTER 10 DRAINAGE . INTRODUCTION. The DRAINAGE system manages both surface and subsurface water coming off the road surface and from the surrounding countryside. The purpose of the system is to ensure that the road and its surrounds are free from standing water at all times and to have sufficient capacity to prevent the road from being overtopped. The principal elements of the system are: 1 Crossfall on the road and shoulders to permit free flow off the road. Main problems are slacks, ruts, flat or obstructed shoulders, or shoulders with edge build up. Water standing next to road embankment 1 Side drains, parallel to the road, which collect run-off from both the road and countryside.
CHAPTER 10 DRAINAGE 10.1 INTRODUCTION The drainage system manages both surface and subsurface water coming off the road …
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