水泥搅拌桩联合排水预压法地基处理分析

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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

排水预压法在我国已是一项成熟的工艺，近年来，大量的软土地基处理工程使用了排水预压法[1-2]。（剩余7053字）