Honeywell HON COCON 13 - Soil Condition and Foundation; Pit Dimensions

Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 19
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4.1.1‐Soilconditionandfoundation
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Dependingonthecompositionofthesoil,aconcretefoundation(plate)underthestationmaybeneeded,toprevent
thestationfromsinking.Withthefollowingsoilcompositions,afoundationisnecessary:
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‐ Organicsoilcompositionssuchaspeat,humusandgardeningsoil.
‐ Very
fine‐grainedsoilcompositions(clayplates)suchasclay,bolderclay,sandyclayandcompost.
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Wealsoadviseyoutouseafoundationunderthestationwithfinegrainedsoilcompositions,suchasloam,sandy
clay,siltandloess.Useconcreteasfoundationmaterial.
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Afoundationisnotnecessarywithmoderate
roughgrainedsoilcompositions,suchassand,gravelsand,windborn
sanddepositandsandyplates.
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Thefoundationmustbeatleast50millimetersthick.Ensurethatyoudonotonlyconsidertheweightofthestation,
whilecalculatingthethicknessofthefoundation,butalsoconsiderextraweight.(For
example,theplacingofavehicle
onthepitcover).
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Thewidthandlengthofthefoundationslabmustbeaminimumof1000mmx1500millimeters.Ensurethatthetopof
foundationplateislevelled.
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4.1.2‐Pitdimensions
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Thepitdepthdependsonthethicknessofthefoundation.Todeterminethe
pitdepthofapartiallyexposedin‐ground
station(pitcoverabovegroundlevel),alwaysusethefollowingformula:
 Depthofpit=906+d
f
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Fillinthethicknessofthefoundationd
f
inmillimeters.Thenumber"906"isthedistancefromthebottomofthe
casingtohalfwayupthepitcoverframe.Theresult‐thedepthofthe,tobedug,pit‐isinmillimeters.
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Todeterminethepitdepthofagroundsunkstation(pitcoveratgroundlevel),alwaysusethefollowingformula:
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 Depthpit=980+d
f
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Fillinthethicknessofthefoundationd
f
inmillimeters.Thenumber"980"isthedistancefromthebottomtothetop
ofthecasing.Theresult‐thedepthofthe,tobedug,pit‐isinmillimeters.
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Example: Forafoundationplate(d
f
)thatis100millimetersthick,thepitdepth,forapartially
exposedin‐groundstationis906+100=1006millimeters.
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Forafoundationplate(d
f
)thatis100millimetersthick,thepitdepthforastationequal
togroundlevelis980+100=1080millimeters.
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Digafunnelshapedhole,sothatyoucaneasilyattachthesupplyanddischargepipestothecasing.Fastenthepiping
‐tensionfree‐intheclamps,whichareattachedtothefoundations.Deliveryofacompletefoundation‐supplied
withapositioningframeforthecasingandfasteningclampsfor
thepiping‐ispossible.