25190.天津臨港工業(yè)區(qū)真空預(yù)壓試驗(yàn)及塑料排水板保土性研究

1、天津大學(xué)碩士學(xué)位論文天津臨港工業(yè)區(qū)真空預(yù)壓試驗(yàn)及塑料排水板保土性研究姓名：丁長(zhǎng)生申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：嚴(yán)馳201112ABSTRACTThelandofTianjinHarborIndustrialZoneiSformedbythelandreclamationintheseathefoundationsoiliscomefromofthebosomofriverandharbor，thewatercontentis

2、very1argeinthebeginningoflandformation，theconventionalfoundationmethodsoffoundationtreatmentaredifficulttoobtainabettereffectAsthevacuumpreloadingtestsaremoreandmoreusedinsoftfoundationtreatment，thereinforcementeffectofv

3、acuumpreloadingmethodobtainmoreidentityPlasticdrainageboardhasreplacethetraditionalbagsandwellbecauseofthelowercostandconvenientconstructionPlasticdrainageboardisthemostcommonveaicaldrainagesystemofvacuumpreloadingtestsi

4、nrecentyearsHoweveraccordingtothedataofmanyyears、theporesizeofplasticdrainageboard’Sfiltrationmembranehasgreateffectonsoillost，soilmicrostructureandfoundationtreatmenteffectThispaperdesignstheschemeofvacuumpreloading，the

5、comparisonandselectionofplasticdrainageboard，indoorsoiltestsandfieldobservationAndmakeaqualitativeanalysisOilsoilmicrostructure，particlesize，porewaterpressuredissipation，foundationsettlementobservationwiththehelpofTianji

6、nUniversityprecisioninstrumentcollegeelectronmicroscopyanalysiscenterandgeotechnicallaboratoryEmphaticallyanal)，xesthedifferenceandrelationbetweenthesoilmicrostructureandgrainsizedistributioncurveatthesamepositionofdiffe

7、rentplasticdrainageboardsandthedifferentpositionsofsameplasticdrainageboardAccordingtothedataofmacroandmicrotests，showthattheporesizeofplasticdrainageboard’SfiltrationmembraneisnotthesmallerthebetterToosmallfiltrationmem

8、braneporesizemaycausetheblockageofdrainagechannelToolargefiltrationmembraneporesizemaycausethelostofsoilItisveryimportanttocontrolthisbalanceinpracticalengineeringtoobtainbettereffectoffoundationreinforcementKEYWORDS：vac