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Interceptor ditch : ウィキペディア英語版 | Interceptor ditch
In geotechnical engineering, an interceptor ditch is a small ditch or channel constructed to intercept and drain water to an area where it can be safely discharged.〔(【引用サイトリンク】title=Best Management Practices Manual )〕 These are used for excavation purposes of limited depth made in a coarse-grained soils. These are constructed around an area to be dewatered. Sump pits are also placed at suitable intervals for installation of centrifugal pumps to remove the water collected in an efficient manner.〔soil mechanics and foundation engineering by Dr. K.R.ARORA on page no. 391. Retrieved on 13 September 2014〕 In fine sands and silts, there may be sloughing, erosion or quick conditions. For such type of soils the method is confined to a depth of 1 to 2 m. Interceptor ditches are most economical for carrying away water which emerge on the slopes and near the bottom of the foundation pit.〔Soil Mechanics and Foundation Engineering by Dr. K.R.ARORA on page no. 392. Retrieved on 13 September 2014〕 Its size depends on the original ground slope, runoff area, type of soil and vegetation, and other factors related to runoff volume.〔(【引用サイトリンク】 title=Inteceptor ditches )〕 ==Construction Guidelines==
* The interceptor ditch commonly consists of a ditch and may have an associated dike. * Secondly the sediment control measures may be required to filter or trap sediments before the runoff leaves the construction area. * The construction of the interceptor ditch at the crown of a slope shall be accomplished prior to the excavation of the cut section.〔(【引用サイトリンク】title=Best Management Practices Manual )〕
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