英语翻译

1.extraoverforexcavationinveryweaktoweakrock(UCS1.25to12.5MN/m2).

2.extraoverforexcavationundergroundwaterwhenrequiredinpipeworkstheitemincludestheitemincludesthedewateringanddisposaloutsidethesiteandtreatmentofexcavatedbottomwithagradedaggregateslayer,levelingandmakegoodforfurtherworkinaditiontodisposalofwastetopublicdumpsaccordingtothetechnicalspecifications

3.6allowancefortheusesheetpilesatbothsidesofthetrenchinlooseorsoftsoilsupto4metersdepthandremovethemafterworkcompletion

3.7extraoverforusingsheetpilesatbothsidesofthetrenchforeachadditionalmeterinthedepthoflooseorsoftsoilsandremovethemafterworkcompletion

3.8allowanceforusingtimberboardsinlooseorsoftsoilsupto3meterdepthandremovethemafterworkcompletion

4.0manholesonmainlines

4.1pattern1(A)

Supplyandbuildcircularmanholesofconcrete(C25)withinternaldiameter1.05mandwallthicknessof225mm,theroofisofreinforcedconcrete(C30)andathicknessof175mm.Theitemincludespipesinsidethemanhole,excavation,concrete,stepirons,benching,requiredreinforcingsteel,isolatinglayertoinnerandoutersurfaces,heavydutycoverandframecomplete,backfilling,anddisposeofwastetopublicdumpsandallworkrequiredtocompleteitemaccordingtodrawings,technicalspecifications,tobeusedforpipesof200to500mmdiameter

4.4pattern3

Supplyandbuildrectangularmanholesofreinforcedconcrete(C30)withinternaldimensions(1.4*1.9*3.1)meterandwallthicknessof250mmandequippedwithaccessshaftofcircularsectionof1meterinternaldiameterandwallthicknessof225mmtheitemincludespipesinsidethemanhole,excavation,concrete(C25),stepirons,benching,concreterequiredreinforcingsteel,isolatinglayertoinnerandoutersurfaces,heavydutycoverandframecomplete,backfilling,anddisposeofwastetopublicdumpsandallworkrequiredtocompleteitemaccordingtodrawings,technicalspecifications,tobeusedforpipesof600to1200diameter

4.5

Supplyandbuildrectangularmanholesofreinforcedconcrete(C30)withinternaldimensions(2.2*1.2)m