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grout curtain
A grout curtain is a barrier that protects the foundation of a dam from seepage and can be made during initial construction or during repair.〔( How grouting is used in dam foundations )〕 Additionally, they can be used to strengthen foundations and contain spills.
==Characteristics==
A grout curtain usually consists of a row of vertically drilled holes filled with pressurized grout, a process commonly known as pressure grouting.〔(Answer.com - Grout cutrain )〕 The holes are drilled in intervals and in such a way that they cross each other, creating a curtain.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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