基本信息
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EXCAVATIONandBASEMENTCONSTRUCTION
Introduction
Ingeneral,excavationmeanstoloosenand.takeoutmaterialsleavingspaceaboveorbelow
ground.Sometimesincivilengineeringtermearthworkisusedwhichincludebackfilling
withnewororiginalmaterialstovoids,spreadinga