换填与加筋相结合处理加宽路基下软土地基的研究

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1、武汉理工大学硕士学位论文换填与加筋相结合处理加宽路基下软土地基的研究姓名：张培申请学位级别：硕士专业：道路与铁道工程指导教师：胡幼常20060401武汉理工大学硕士学位论文AbstractTnrecentyears，m曲一gradehi曲wayis铲owillgwi也11nexampledspeed．Someofthem，whjchwereconsnllctedinea订ydays，havebeenoraretobewidenedbecauseoftoomuchtraffic．Thesewidenedorneedt

2、obewidenedmadsmostlylieon恤eareawithmuchsoR乒oundinnourishedregioIlSalor培theriVersorcoast．Howtocontmlthedi仃erentse砌ementbeMeen廿1ewideneda11dtheoldpanof山esubgradeisadi箍cultpmblem，butithastobes01ved．WhentheⅡlicknessoftllesoft罂D吼dissmn，placir唱ageosyntheticsundermes

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5、eplacement．ForeVerysystemmentionedhere，meeffbctingmlestothedifrerentsettlementbetwe皿mewidenedandt11eoldpanofthesubgradebysuchf如torsasthethickllessofmesoftgmund，thedepthofthereplacement，theheightofthesub乒adea11dmemod山usofthegeosyntheticsarestudied．Thef01lowingi

6、smeconclusions．(I)Ifthetllicl【11essofthesoftlayerandmehei曲tofthesub野扭earebothbigger，theeffbctcanh盯dlyobtainedtoreducethedi丘bremsemementonlywithreinforcement．Butmisdi行efentsettlememmaybeluldercontrolbyreinforcingandreplacingacertaiildepthofthesoRsoilwitIls趾ld砒l

7、d萨avel．Thelargerthereplacementdeptllis，thesmallerthedi豌rentsemementis．(2)Whenanyomersubgradeparametcrsaregiven，thelargerthemodulusofgeo鲥dis，thebetterthe如nctionofdecreasing1ateraldefo肌ationis’a11dthusthe武汉理工大学硕士学位论文smallermedifferentsetnementis．Thedetailofthisc

8、onclusionproposedinmisp印ermaygLIidetochooseageo鲥dwithpmpermodlllustoachjeveane仃ectiVeaIldeconomicalpu印ose．(3)whentllediffbrentsetclementis百Ven，themodulusofgeog^dandthedepthofr印1ace