地鐵深基坑施工中對鄰近建筑物的施工風(fēng)險及基坑支護(hù)施工研究

地鐵深基坑施工中對鄰近建筑物的施工風(fēng)險及基坑支護(hù)施工研究摘要

隨著城市化的加速，地下空間的建設(shè)需求越來越大，地鐵深基坑施工成為各大城市建設(shè)中不可或缺的一部分。然而，在地鐵深基坑施工過程中，鄰近建筑物的風(fēng)險問題值得關(guān)注。本文通過對地鐵深基坑施工中對鄰近建筑物的施工風(fēng)險及基坑支護(hù)施工研究，對此進(jìn)行深入分析和研究。

論文首先對地鐵深基坑施工中的知識和現(xiàn)狀進(jìn)行了介紹，包括地鐵車站的建設(shè)過程、地鐵深基坑項(xiàng)目的施工過程等。其次，本文圍繞地鐵深基坑施工中鄰近建筑物的施工風(fēng)險問題展開研究，主要涵蓋以下兩個方面：一是對鄰近建筑物的影響分析，主要包括土體沉降、地面振動以及基坑側(cè)土力作用等；二是基坑支護(hù)設(shè)計(jì)方案研究，包括支護(hù)結(jié)構(gòu)、支護(hù)材料選取等。最后，本論文對一些深基坑施工中常見的應(yīng)對措施進(jìn)行了介紹和分析，并提出一些建議和改進(jìn)建議。

通過本文對地鐵深基坑施工中對鄰近建筑物的施工風(fēng)險及基坑支護(hù)施工研究，為深基坑施工中風(fēng)險的預(yù)防和控制提供了指導(dǎo)性的思路和建議，具有實(shí)際應(yīng)用和推廣的價值。

關(guān)鍵詞：地鐵深基坑；鄰近建筑物；施工風(fēng)險；基坑支護(hù)；應(yīng)對措施

ABSTRACT

Withtheacceleratedurbanization,thedemandfortheconstructionofundergroundspaceisbecomingincreasinglyhigh,andtheconstructionofdeepsubwayfoundationpithasbecomeanindispensablepartoftheconstructionofmajorcities.However,theriskofnearbybuildingsduringtheconstructionofdeepsubwayfoundationpitsisworthpayingattentionto.Thispaperconductsin-depthanalysisandresearchontheconstructionrisksofnearbybuildingsinthedeepsubwayfoundationpitsandtheconstructionofpitsupport.

Thispaperfirstintroducestheknowledgeandcurrentsituationoftheconstructionofdeepsubwayfoundationpits,includingtheconstructionprocessofsubwaystationsandtheconstructionprocessofdeepsubwayfoundationpitprojects.Secondly,thispaperfocusesontheresearchontheconstructionriskofnearbybuildingsintheconstructionofdeepsubwayfoundationpits,mainlycoveringtwoaspects:analysisoftheimpactonnearbybuildings,includingsoilsettlement,groundvibration,andlateralearthpressureoffoundationpit,etc.;researchonthedesignschemeofpitsupport,includingsupportstructure,selectionofsupportmaterials,etc.Finally,thispaperintroducesandanalyzessomecommonresponsemeasuresindeepfoundationpitconstructionandproposessomesuggestionsandimprovementsuggestions.

Throughtheresearchontheconstructionrisksofnearbybuildingsinthedeepsubwayfoundationpitsandtheconstructionofpitsupportinthispaper,itprovidesguidingideasandsuggestionsforthepreventionandcontrolofrisksindeepfoundationpitconstruction,andhaspracticalvalueandpromotionvalue.

Keywords:deepsubwayfoundationpit;nearbybuildings;constructionrisks;pitsupport;responsemeasureIntroduction

Constructionofdeepsubwayfoundationpitsisasignificantengineeringprojectthatinvolvesahighdegreeofcomplexityandrisk.Theconstructionofsuchpitsmayposeriskstonearbybuildings,anditis,therefore,crucialtoadopteffectivemeasurestopreventandcontroltheserisks.Thisstudyexplorestheconstructionrisksofnearbybuildingsindeepsubwayfoundationpitsandproposessuggestionsforthepreventionandcontroloftheserisks.

ConstructionRisksofNearbyBuildings

Theconstructionofdeepsubwayfoundationpitscanhavesevereimplicationsforthesafetyofnearbybuildings.Theseimplicationscanbecategorizedintothreemaintypes:directstructuraldamagetothebuildings,damagetothefoundationandsoil,andtheinfluenceoftheexcavationprocess.

Directstructuraldamagetonearbybuildingscanbecausedbyexcavation-inducedgroundmovement,foundationvibration,andsurfacesettlement.Groundmovementmaycausecracksinwalls,floors,andfoundations,whilevibrationmaydamagethestructuralintegrityofnearbybuildings.Surfacesettlementcanleadtodifferentialsettlementthatcancausesignificantstructuraldamagetobuildings.

Theconstructionofdeepsubwayfoundationpitscanalsoaffectthefoundationandsoilofnearbybuildings.Theexcavationprocesscandestabilizethefoundationofadjacentbuildings,leadingtolong-termsettlementanddamage.Thisinstabilitycanalsohaveaknock-oneffectonthesoil,causingsoildeformation,instability,andlong-termsettlement.

Finally,theconstructionofdeepsubwayfoundationpitscanhaveasignificantimpactontheconstructionprocessitself.Theexcavationprocesscandisrupttransportationinfrastructure,leadingtocongestionandtraffichazards.Theprocesscanalsoleadtonoise,dust,andothertypesofpollutionthatcanaffectthehealthandwell-beingofnearbyresidents.

PitSupportandResponseMeasures

Itisessentialtoadopteffectivepitsupportmeasurestopreventandcontroltheconstructionrisksassociatedwithdeepsubwayfoundationpits.Thesemeasuresincludeshallowexcavation,cantileverretainingwalls,piles,andanchors.Shallowexcavationinvolvesreducingthedepthoftheexcavationandusinghorizontalsupports,suchassheetpiling,tosupportthepit.Cantileverretainingwallsuseacombinationofhorizontalsupportsandverticalsupports,suchasconcretewalls,tostabilizethepit.Pilesandanchorsaredrivenintothefoundationofnearbybuildingstoprovideadditionalsupportandstability.

Effectiveresponsemeasuresincludemonitoring,control,andcompensation.Monitoringinvolvesreal-timemonitoringofgroundmovement,vibration,andsoilstability.Controlmeasuresmayinvolveadjustingtheexcavationprocess,reinforcingnearbybuildings,anddivertingtraffic.Compensationmeasuresmayincludefinancialcompensationfordamagetonearbybuildingsandcompensationforresidentsaffectedbynoise,dust,andothertypesofpollution.

Conclusion

Theconstructionofdeepsubwayfoundationpitsposessignificantriskstonearbybuildings.Theserisksincludedirectstructuraldamage,damagetothefoundationandsoil,andtheinfluenceoftheexcavationprocess.Effectivepitsupportmeasures,suchasshallowexcavation,cantileverretainingwalls,piles,andanchors,canhelppreventandcontroltheserisks.Effectiveresponsemeasures,suchasmonitoring,control,andcompensation,canhelpmitigatetheimpactofconstructiononnearbybuildingsandresidents.Overall,itisessentialtoadoptaholisticapproachtopreventandcontrolconstructionrisksindeepsubwayfoundationpitsInadditiontotherisksassociatedwithdeepsubwayfoundationpitsdiscussedpreviously,thereareseveralotherpotentialrisksthatneedtobeconsideredduringtheconstructionprocess.Theserisksincludetheimpactoftheconstructionontheenvironment,thesafetyofworkers,andtheimpactonthelocaleconomy.

Oneofthemostsignificantrisksassociatedwithconstructionistheimpactontheenvironment.Thiscanincludethereleaseofpollutants,thedestructionofecosystems,andthedisplacementofwildlife.Theconstructionofsubwayfoundationpitscanalsocausesoilerosionandsedimentation,whichcaninturnaffectwaterqualityandcausedamagetonearbyhabitats.Mitigatingtheenvironmentalimpactofconstructionrequiresathoroughunderstandingofthelocalecologyandtheimplementationofappropriatemeasurestoprotectit.

Anotherriskassociatedwithconstructionisthesafetyofworkers.Constructionsitescanbedangerousenvironments,withhazardssuchasfallingobjects,machineryaccidents,andexposuretohazardousmaterials.Effectivesafetymeasures,suchastraining,protectiveequipment,andsiteinspections,areessentialtopreventaccidentsandensurethewellbeingofworkers.

Finally,theimpactofconstructiononthelocaleconomyisanotherriskthatneedstobeconsidered.Duringtheconstructionprocess,businessesandresidentsintheareamayexperiencedisruptionsandlosses.Thesecanincludedecreasedaccesstoroadsandpublicspaces,decreasedfoottrafficforlocalbusinesses,andpotentialdamageordestructionofnearbybuildings.Itis,therefore,essentialtoworkcloselywiththelocalcommunitytoidentifyandminimizepotentialeconomicimpacts.

Topreventandmitigatetheseadditionalrisks,itisnecessarytoengageincarefulplanningandpreparationduringthedesignandconstructionprocess.Thisrequirestheinvolvementofmultiplestakeholders,includingengineers,environmentalexperts,communityrepresentatives,andlocalgovernmentofficials.Takingacollaborativeandproactiveapproachcanhelptoensureasuccessfulandsustainableconstructionproject,withminimalnegativeimpactsontheenvironment,workers,andthelocaleconomy.

Inconclusion,theconstructionofdeepsubwayfoundationpitsisacomplexandchallengingprocessthatcarriessignificantrisks.Topreventandcontroltheserisks,itisnecessarytoadoptacomprehensiveapproachthataddressesboththetechnicalandnon-technicalaspectsofconstruction.Byimplementingeffectivesupportmeasures,responsemeasures,andsafetymeasures,aswellastakingintoaccountpotentialenvironmentalandeconomicimpacts,itispossibletosuccessfullycompleteconstructionprojectsandensurethewellbeingofworkers,residents,andtheenvironmentInadditiontothetechnicalandnon-technicalaspectsofconstruction,thereareseveralotherfactorsthatcanaffectthesuccessofaconstructionproject.Theseincludestakeholderengagement,projectmanagement,andlegalandregulatorycompliance.

Stakeholderengagementisessentialtoensurethatallpartiesareawareoftheprojectgoals,timelines,andpotentialrisks.Thisincludesengagingwithlocalcommunities,environmentalgroups,andotherstakeholderstoaddressconcernsandensurethattheirneedsaretakenintoaccount.Effectivestakeholderengagementcanalsohelptobuildtrustandsupportfortheproject,reducingthelikelihoodofdelaysorlegaldisputes.

Projectmanagementisanothercriticalfactorinconstructionsuccess.Awell-managedprojectcanhelptoensurethattimelinesaremet,budgetsarecontrolled,andrisksareeffectivelymanaged.Thisinvolvesdevelopingaclearprojectplan,includingtimelines,budgets,andriskmanagementstrategies,aswellasmonitoringprogress,identifyingpotentialissues,andtakingcorrectiveactionasneeded.

Legalandregulatorycomplianceisanotherconsiderationinconstruction.Constructionprojectsaresubjecttoawiderangeoflawsandregulations,includingbuildingcodes,environmentalregulations,andhealthandsafetylaws.Failuretocomplywiththeserequirementscanresultinlegalpenalties,delays,andreputationaldamage.Tomitigatetheserisks,itisimportanttoensurethatallaspectsoftheproj