N080607217吴鹏德南京地铁某盾构隧道端头施工质量控制

南京林业大学本科毕业设计（论文）题目：南京地铁某盾构隧道端头施工质量控制及盾构始发实测研究学院：南方学院专业：土木工程（建筑工程）学号：N080607217学生姓名：吴鹏德指导老师：张婷职称：讲师二0一二年五月二十一日摘要盾构始发端头地层的稳定性非常重要，这也是盾构始发风险所在。如何确定土体加固的范围，保证该阶段加固土体的强度和安全性，是盾构隧道施工中必须解决的问题。结合南京地铁绿博园站端头盾构始发工程，讨论软土地区常用加固方式，加固所采用的技术参数以及施工质量控制。通过查阅资料和初步研究，本文得出：对于软土地区，多采用水泥土深层搅拌桩+高压旋喷桩（或注浆）的加固方式，土体扰动极限平衡理论计算得出的横向加固尺寸小于构造要求，只要能够满足构造要求，土体在抵抗扰动上就有足够的安全系数。盾构始发是盾构隧道施工中的事故多发阶段，无论采取何种方法，土体加固和改良的效果是质量控制的关键，绿博园监测又在很大程度上指导着工程的进程，所以盾构隧道端头施工质量控制及盾构始发实测显得尤其重要，要特别注意盾构隧道端头加固的施工质量控制以及工程监测。关键词：盾构始发；加固土体；设计方法；安全性；质量控制；工程监测。ABSTRACTAbstract：Shieldlaunchingendformationstabilityisveryimportant,thisisalsotheshieldlaunchingrisk.Howtodeterminethesoilreinforcementrange,toensurethatthestageofreinforcingsoilstrengthandsafetyofshieldtunnelconstruction,isaproblemthatmustbesolvedin.Combinedwiththeshieldmachinelaunchingengineeringinlvboyuansubwaystation’sinNanjing,itstechnicalparameters，constructionqualitycontrolandemergencymeasuresofcommomreinforcementmethodsusedinsoftsoilareawerediscussed．Throughaccesstoinformationandpreliminaryresearch,thisarticlecomestotheconclusionthatthereinforcementmethodwhichcombineddeepsoilcementmixingpileandhigh-pressurejetgroutingpile（orgrouting）wasmostwidelyused．Thetransversereinforcementsizecalculatedwiththelimitequilibriumtheoryofsoildisturbancewaslessthanconstructionrequirements，andaslongasitcouldsatisfythestructuralrequirements，thesoilwouldhaveenoughsafetycoefficientsinresistingdisturbance．Shieldmachinelaunchingisaccident-pronestageinshieldtunnelconstructionandtheproblemmustbesolvedinconstructionishowtoensurethesafetyandstrengthofthereinforcedsoilinordertodeterminethescopeofsoilreinforcement．Nomatterwhatmethod,soilreinforcementandimprovementtoqualitycontrolisthekey.Monitoringandtoalargeextent,directstheengineeringprocess.Sotheshieldtunnelconstructionandqualitycontrolofshieldlaunchingtestappearsespeciallyimportant,specialattentionshouldbepaidtoshieldtunnelendreinforcementconstructionqualitycontrolandengineeringmonitoring.Keywords：shieldmachinelaunching；reinforcedsoil；designmethod；safety；qualitycontrol；engineeringmonitoring.目录1盾构隧道技术的发展.....................................................11.1国外盾构隧道技术发展...............................................11.2我国盾构隧道技术的发展.............................................21.3盾构隧道端头加固方法...............................................42高压喷射注浆法.........................................................52.1高压喷射注浆技术的发展.............................................52.1.1起源............................................................52.1.2国内外现状.....................................................52.2高压喷射注浆法分类.................................................62.3高压喷射注浆加固基本原理...........................................82.4高压喷射注浆工法适用范围及特征.....................................92.5工程实例..........................................................123深层搅拌桩法..........................................................133.1深层搅拌法技术发展................................................133.1.1起源...........................................................133.1.2国内外现状.....................................................133.2深层搅拌桩法加固型式的分类........................................143.3深层搅拌桩法水泥加固土的原理......................................153.4深层搅拌法的适用范围..............................................173.4.1对地质勘察的要求...............................................173.4.2适用土质与加固深度.............................................173.4.3适用工程对象...................................................173.5工程实例..........................................................184盾构隧道端头加固施工质量控制..........................................194.1工程概况..........................................................194.1.1工程位置.......................................................194.1.2地质情况.......................................................194.2端头加固施工控制措施..............................................204.2.1绿博园站的端头井加固施工方法的选择.............................204.2.2技术要求及工作量统计...........................................214.2.3加固强度检验方法...............................................224.2.4高压旋喷桩施工工艺及技术要求...................................224.2.5搅拌桩质量通病防治.............................................234.2.6冻结加固方式及技术要求.........................................244.2.7施工质量控制措施...............................................265绿博园站盾构始发实测..................................................275.1监测方案..........................................................275.1.1监测目的.......................................................275.1.2监测项目.......................................................285.1.3测点布置.......................................................285.1.4监测方法.......................................................295.1.5监测频率.......................................................315.1.6警报值.........................................................325.1.7监测仪器.......................................................325.1.8监测措施.......................................................335.2始发监测结果分析..................................................335.2.1监测过程............................................