Hasil (
Bahasa Indonesia) 1:
[Salinan]Disalin!
Keuntungan dari mengeruk adalah bahwa hal itu dapat bekerja secara efisien di air yang dangkal serta air yang lebih dalam.Pompa air juga umumnya lebih ringan daripada kompresor udara setara,sehingga penggalian dapat dilakukan dari platform kerja yang lebih mobile seperti perahu kecil. Mengeruk tidak perlu untuk menjadi aman diikat ke dasar laut, meskipun ada kekuatan yang disebabkan oleh pelepasan air di ujung yang cenderung drive mengeruk maju.There are a number of disadvantages with the dredge. It does not work well when inclined upward, causing problems when it is necessary to excavate in a hole.This can be resolved by keeping the main dredge section horizontal and running a flexible tube down into the hole (Figure 9.14). If there is a current the water dredge needs to be set up so that it discharges down current taking into account current changes. Additionally, the efficiency of the dredge diminishes with increasing length of discharge tube. Thus, there is a limit to the distance that spoil can be discharged off the site. It is usually not possible to discharge more than about 5–10 m with a medium-sized fire pump.This can cause problems when excavating a large site, but with careful planning spoil can be deposited off the site. This contrasts sharply with the airlift which discharges its spoil high up above the site, usually some distance horizontally off the site, and utilizes the current to carry debris even further off. One final problem is that it is difficult, at the end of operations, to coil up the fire hose used to supply the water to the dredge. It is worth making a fitting that can be attached to the boat-end of the pipe so that air can be introduced into the hose to facilitate recovery, which otherwise requires a great deal of effort to load inboard when filled with water (see Negrel, 1976).
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