集水井，sump pit / collecting well，井径较大，用以汇集和存蓄地下水或者渗漏水的水井。
n. sump
misc. water-collecting well
分别利用集水井、调节池、反应除油池作预处理；
Firstly, collection well, equalization tank, oil & grease trap were used as pretreatment.
俄亥俄河上的水在岸边被过滤，然后汇聚在多口集水井中。
Water flowing from the Ohio river is filtered through the riverbank and gathered in various collector wells.
采用钻孔灌注桩作为深地坑的围护结构，在坑内设排水沟、集水井排水。
The concrete piles being poured into deep hole act as the enclosure structure of deep pit. There are draining ditch and water gathering well inside the pit for drainage.
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