超載預壓加固軟土路基現(xiàn)場試驗研究.pdf

1、中國科學院武漢巖土力學研究所碩士學位論文超載預壓加固軟土路基現(xiàn)場試驗研究姓名：張在喜申請學位級別：碩士專業(yè)：巖土工程指導教師：汪稔20030601ABSTRACTAsaneffectivemethodofstrengtheningthesoftsoil，thesurchargepreloadingwithpacksandwellsisusedwidelytotreatthesoftgroundinlotsofprojectswhichh

2、avestrictrequirementonpostconstructionsettlementandunevensettlement，ObservationofthesettlementandstabilityiSthemostreliablemethodthatcontrolstheconstructionspeedforensuringthesafetyandstabilityoftheembankmentandevaluates

3、theeffectsofsurchargepreloadingInthispaperthebehaviorofthedeformationandconsolidationofsoftgroundunderhighwayembankmentwerestudiedthoroughlyaccordingtolargeamountsofin—siteobservationdatainXiamenHaicangexpressway，moreove

4、rthedeterminationofconstructioncontrolindexandtheprecompressionperiodwerediscussednleelaborateworkinvolvesseveralaspectsasfollow：1、Theunsuitabilityofthein—useconstructioncontrolindexwasanalyzedbyshowingthattheconstructio

5、ncontrolstandardshouldconsiderthedeformationmechanismofsoftsoils，andflnewsettlementrateindexforhighwaywassuggestedbyconsideringthegeologicalconditionsandsoftsoilproperties2、BasedOnlargeamountsoffieldobservationdata，chara

6、ctersofthedeformationandconsolidationofsoftclayfoundationunderembankmentwerestudiedindetails，andthebehaviorsofthesettlement，lateraldisplacementandporewaterpressurewereanalyzedsystematically3、Bymeansofcomparingandstat，the

7、influencesoftheconstructionmethods，thethicknessofsoftclayandthecofferdamonthesoftgrounddeformationwerediscussed，andareasonableconstructionmethodwasproposedItwasfoundthatthethicknessofsoftclayisthekeyfactortoaffectthegrou

8、ndsettlementMoreover，theadditionalsettlementinducedbylateraldisplacementwasdiscussed4、nleevaluationofsurchargepreloadingandthedeterminationofprecompressionperiodwerestudiedintheoryThecalculationmethodsofpost—construction

9、settlementweredevelopedbasedonfieldobservationdataFinallytheeffectsofsurchargepreloadinginHaicangexpresswaywereevaluatedthroughanalyzingthepostconstructionsettlementsandconsolidationdegreesKeywords：surchargepreloading，so