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ID:59438930
大小:2.16 MB
页数:31页
时间:2020-09-18
《(全英文)建筑施工基坑开挖的安全防护ppt课件.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、OSHAOfficeofTrainingandEducation1ExcavationsOSHAOfficeofTrainingandEducation2ExcavationHazardsCave-insarethegreatestriskOtherhazardsinclude:AsphyxiationduetolackofoxygenInhalationoftoxicmaterialsFireMovingmachineryneartheedgeoftheexcavationcancauseacollapseAccidentalseveri
2、ngofundergroundutilitylinesOSHAOfficeofTrainingandEducation3InjuryandDeathExcavatingisoneofthemosthazardousconstructionoperationsMostaccidentsoccurintrenches5-15feetdeepThereisusuallynowarningbeforeacave-inOSHAOfficeofTrainingandEducation4DefinitionsExcavation–aman-madecut
3、,cavity,trench,ordepressionformedbyearthremoval.Trench–anarrowexcavation.Thedepthisgreaterthanthewidth,butnotwiderthan15feet.Shield-astructureabletowithstandacave-inandprotectemployeesShoring-astructurethatsupportsthesidesofanexcavationandprotectsagainstcave-insSloping-ate
4、chniquethatemploysaspecificangleofinclineonthesidesoftheexcavation.Theanglevariesbasedonassessmentofimpactingsitefactors.OSHAOfficeofTrainingandEducation5FocusofTrainingThegreatestriskatanexcavationHowtoprotectemployeesfromcave-insFactorsthatposeahazardtoemployeesworkingin
5、excavationsTheroleofacompetentpersonatanexcavationsiteOSHAOfficeofTrainingandEducation6ProtectionofEmployeesEmployeesshouldbeprotectedfromcave-insbyusinganadequatelydesignedprotectivesystemProtectivesystemsmustbeabletoresistallexpectedloadstothesystemOSHAOfficeofTrainingan
6、dEducation7RequirementsforProtectiveSystemsAwell-designedprotectivesystemCorrectdesignofslopingandbenchingsystemsCorrectdesignofsupportsystems,shieldsystems,andotherprotectivesystemsPlusAppropriatehandlingofmaterialsandequipmentPlusAttentiontocorrectinstallationandremoval
7、EqualsProtectionofemployeesatexcavationsOSHAOfficeofTrainingandEducation8DesignofProtectiveSystemsTheemployershallselectandconstruct:slopesandconfigurationsofslopingandbenchingsystemssupportsystems,shieldsystems,andotherprotectivesystemsShield-canbepermanentorportable.Also
8、knownastrenchboxortrenchshield.Shoring-suchasmetalhydraulic,mechanicalortimbershoringsyst
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