水泥攪拌樁聯(lián)合排水預(yù)壓法地基處理分析

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DUAN Zhiyuan’,LI Desheng',XUE ,CHEN Jun’ang2,LIANG Qinghua3 (1. College of Civil and Transportation,Hohai University,Nanjing 21OO24, China; 2. Guangdong Hydropower Planning & Design Institute co.,Ltd., Guangzhou 51O00O,China; 3. Nansha Water Affairs Bureau Guangdong Provincial, Guangzhou 51OOOo,China)
Abstract:Inthispaper,thecement mixingpilecombined withdrainagepre-compression methodisusedtoreinforcethesoft groudfoundationincoastalarea,andthenumerical simulationofthereinforcementefectofthismethodiscarriedoutby PLAXIS 3Dfiniteelementsoftware,whichsimulatesandanalyses thesetlementandhorizontal displacementofthefoundation undertheconditionsofwaterfrontorairside,aswellastheinfluenceofthedepthofthesoftfoudationandtedisturbanceof the soilnthestabilityof the foundation.Theresult shows that:thecementmixingpilecombined with drainage pre-compression methodcanefectivelyreducethesetlementduringandafterconstruction,andsignificantlyimprovethedeformationresistance andstabilityoffoundations,especiallyundertidalaction,the methodcanefectivelycontroltheunevensetlement,reducethe subsidenceofone sideof theroadbedandthe bulgeof the waterfrontside,andresist thesoildisturbance:whenthedepthof the softfoundationislarge,thesetlementinfluencerangeoffoundations increasessignificantly,butaftera Whenthedepthofsoft foundationislarger,thesetlementinfluencerangeoffoundationincreasessignificantly,butafteralong timeofconsolidationtreatment,thesetlementvaluedecreasessignificantlyTheresultsofthestudycanprovideimportanttheoreticalbasisand technical reference for coastal soft foundation treatment.
Keywords:cement mixing pile;drainage pre loading;finite element modeling;settement;lateral displacement
0 引言
排水預(yù)壓法在我國(guó)已是一項(xiàng)成熟的工藝,近年來(lái),大量的軟土地基處理工程使用了排水預(yù)壓法[1-2]。(剩余7053字)