朱坤,高压旋喷桩在施工中的技术和应用VIP免费

继续教育学院毕业设计（论文）题目高压旋喷桩在施工中的技术与应用专业土木工程姓名朱坤学号5211215134指导教师童世虎起讫日期2016.12.20～2017.05.102017年05月10日高压旋喷桩在施工中的技术和应用摘要旋喷桩兴起于二十世纪七十年代的高压喷射注浆法，八、九十年代在全国得到全面发展和应用。实践证明此法对处理淤泥、淤泥质土、粘性土、粉土、沙土、人工填土和碎石土等有良好的效果，我国已将其列入现行的《地基与基础施工规范》。采用高压旋喷技术,通过在覆盖层内的钻孔向孔周喷射水泥浆而建成的承重桩。这是地基处理的一种新方法。20世纪70年代初,日本首先开始应用,随后,世界各工业发达国家先后引进。中国于70年代中期开始应用,至1982年底,已在30多项工程中,建成了总长度约2万余米的旋喷桩。旋喷桩是利用钻机将旋喷注浆管及喷头钻置于桩底设计高程，将预先配制好的浆液通过高压发生装置使液流获得巨大能量后，从注浆管边的喷嘴中高速喷射出来，形成一股能量高度集中的液流，直接破坏土体，喷射过程中，钻杆边旋转边提升，使浆液与土体充分搅拌混合，在土中形成一定直径的柱状固结体，从而使地基达到加固。施工中一般分为两个工作流程，即先钻后喷，再下钻喷射，然后提升搅拌，保证每米桩浆液的含量和质量。关键词：施工桩基InthehighpressurejetgroutingpileconstructiontechnologyandapplicationAbstractJetgroutingpileupinthe1970softhehighpressurejetgroutingmethod,eight,comprehensivedevelopmentandapplicationinthecountryintheninetys.Practicehasprovedthismethodtodealwithsilt,siltsoil,clay,silt,sand,artificialfilledsoilandgravelsoilhasgoodeffect,ourcountryhasinitslistofthecurrentspecificationforconstructionofthefoundationandbasis.USESthehighpressurejetgroutingtechnology,bydrillinginthelayertobuiltaroundjetgroutandbearingpile.Thisisanewmethodofgroundtreatment.Firststarttheapplicationintheearly1970s,Japan,thenhasintroducedtheworld'sindustrialdevelopedcountries.Inthemid-70-sbegantoapplyinChina,bytheendof1982,hasbeeninmorethan30engineering,completedatotallengthofabout20000metersfromjetgroutingpile.Jetgroutingpileistousethedrillwillberotaryjetgroutingpipeandnozzleatthebottomofthepiledesignelevation,thepre-madegoodslurryflowthroughthehighvoltagegeneratorgethugeenergy,fromhighspeedjetgroutingtubesideofthenozzle,theformationofahighlycentralizedenergyflow,thedirectdamagetothesoil,theinjectionprocess,thedrillpiperotationwhilepromoted,maketheslurryandsoil,mixinginthesoiltoformacertaindiameterofcolumnarconcretionbody,sothatthefoundationreinforcement.Constructioningeneralisdividedintotwoworkingprocess,namelythefirstsprayafterdrilling,drillinginjectionagain,andthenimprovemixing,ensurethequalityofthecontentofserumandpermeter.KeyWords：Constructionproject;Costmanagement;Discussed目录摘要.....................................................................IABSTRACT...............................................................II第一章前言..............................................................1第二章施工工序..........................................................22.1施工机具............................................................22.2施工前准备...........................................................22.3施工流程.............................................................22.3工程的肢解..........................................................3第三章施工工艺要求技术要点............................................93.1工艺要求............................................................93.2技术要点...........................................................11第四章安全规范.........