浅谈正压冲固平台地基加固及承载机理研究

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1、天津大学硕士学位论文正压冲固平台地基加固及承载机理研究姓名：李亚坡申请学位级别：硕士专业：岩土工程指导教师：严驰20040101摘要海上软主蟪基燕基狰国乎惫毅攮念，是平螽技本数重要毯毅，歪压挣露平套地基加固机理研究及承载机瑗研究愚正压冲圊平台课题要解决的关键技术之一。本文将针对浅海越区兹软牯±建蒸，对正莲冲固乎台邋蘩搬圈瓿理积复合基础承载机理进行研究，形成以下成聚：l结合魅利油田媳基土质特惑对在胜剩濑爨建造平台豹麓葶申可行方寨进行技术比较，提出了正压冲固平台地基加阈方案，提出了复合基础的破坏模式，针对破坏模式进行了加固枫理的研究。2科学的选择

2、了地基加固材料及添加剂，搽讨了水泥土的围化机瑶、力学分板及海水对水泥土的侵蚀，进行水泥±的配方试验砺究，3进行了复合基础骚向承载机理分丰斤及水平承载丰几璎分析，优选了承载力计算公式，并为承载力计算软件开发打下了基础。4进行了雁压冲固平台复合基础承簸力计算软件的开发，介绍了较件的基本功能与原理，提供了程序框图以及界颟演示，并用实际算例检验了软件的科学往。5进行了正压冲固平台地基承载力计算，研究了土性参数对正压冲周平台地基承载力的敏戆性分轿。关键词：正压冲固平台水泥土复合基础地基承载力敏感性分析ABSTRACTItiSimportanttoimp

3、rovethesoftsubsoilinseabedinordertouseasthefoundationoftheplatform．Thoconceptofthepositivepressureplatformtreatedbyjeaingisallinnovationoftheconstructiontechnologyofplatforms．Themechanismoftheimprovementbyjettingandbearingofthepositivepressureplatformfoundationisoneofthecru

4、cialtechniquesthathavetobesolvedassoonaspossible．Thispapercarriesoutaresearchonthemechanismforthesoftclaysubsoilintheshaltowseaandfollowingconclusionsarereached：{。Bycomparingallthefeasibleplansbased011thesoilpropertiesintheShenglioilfield，thetreatmentschemeoftheplatformfoun

5、dationisproposed．ThatistopenetratetheshortrigidpilestotherequireddepthbyjeUingandformcompositefoundationwithcementsoil．FurthermorethefailuremodeofthecompositefoundationisrepresentedandtheimprovementmechanismfocusingOilthisfailuremodeisstudied．’2．Themateriatforthefc)undation

6、treatmentandtheadditivesareselectedrationally．Thenthesolidificationmechanismofcementsoilisdiscussedandthemechanicalfeaturesandthecorrosiononthecementsoilbytheseawaterareanalyzed。Atsothecompoundingtestsofcementsoilarecarriedout．3．nlemechanismsoftheverticalandlateralbearingof

7、thecompositefoundationa糟analyzedandtheformulatocalculatethebearingcapacityofthetreatedfoundationisselected，whichprovideabasisforthesoftwaredevelopmentofthecapacitycalculation．4．Thesoftwaretocomputethebearingcapacityofthecompositefoundationtreatedbyjettingofthepositivepressu

8、replatformisdeveloped，Thenthebasicfunctionandprincipleofthesoftwarearedescribed，pr