天津地铁盾构隧道加固旋喷桩施工技术交底

'施工技术交底工程名称：天津地铁3号线13标右线盾构隧道编号：总包单位中铁隧道集团三处有限公司分包单位交底内容到达井端头加固旋喷桩施工技术交底交底时间2009年09月25日1、工程概况及工程地质情况2、施工准备3、施工工艺4、资源配置5、工期计划6、质量保证措施7、安全保证措施8、文明施工保证措施附：旋喷桩桩位图交底人：复核：时间：年月日接收人：生产经理现场技术（含安全）施工工长班组长mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 一、工程概况及工程地质概况1、工程概况本工程盾构到达井端头采用φ800@600旋喷桩进行端头地层加固,旋喷桩按梅花形布置。端头地基纵向加固长度为9.0m（设计加固长度为6米，盾构机主机长度为8.68米，为保证出洞安全，加固区长度增加到9米），加固宽度为盾构隧道轮廓线左右各3.0m，竖向加固范围为盾构隧道结构轮廓线上下各3.0m（-6～-18m），详见下图所示。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 2、工程地质概况本场区土壤最大冻结深度0.7m，标准冻结深度0.6m。根据勘探揭露的地层资料表明，到达井加固范围有以下几个基本土层：1）、③-1粉质粘土：褐黄色、黄褐色、灰褐色、灰黄色，可塑～流塑2）、③-2粉土：黄褐色，稍湿～湿，密实，夹薄层、粉砂，区域-4～-6.3米。3）、④-1粉土：灰色，可塑～流塑，与粉土互层，呈千层状，局部含贝壳碎片。4）、④-2粉土：灰色、褐黑色，湿～很湿，中密～密实，区域-6.3～-7.6米。5）、⑤-1粉质粘土：浅灰色、灰白色，可塑～软塑，顶部为泥炭层，黑色4）、⑥-1粉质粘土：灰黄色、褐黄色、灰褐色，软塑～可塑，含贝壳，局部夹浅灰色条带其中③-2粉土、④-1粉土、④-2粉土渗透系数较大，在1.7E-2.8E×10-8之间，到达时易出现涌水、涌砂现象，对加固要求较高。3、水文条件本场地内表层地下水类型为第四系孔隙潜水。赋存于第Ⅱ陆相层以下粉砂和粉土中的地下水具有微承压性，为微承压水。本场地内粘性土渗透系数小，弱透水性，具有相对隔水层性质，渗透系数K≤1.15×10-5～1.15×10-4cm/s。粉土、粉砂为中等透水层，为相对赋水地层。场地内地下水位较高，含水层呈层状分布，在垂直方向具有不均匀性。该段地表水对混凝土结构无腐蚀性；对混凝土结构中的钢筋具有中等腐蚀；对钢结构具中等腐蚀。第Ⅱ陆相层之上的潜水对混凝土结构无腐蚀性；对钢筋混凝土结构中的钢筋具有中等腐蚀；对钢结构具有中等腐蚀。第Ⅱ陆相层及以下的微承压水对混凝土机构具有硫酸盐中等-强腐蚀性；对钢筋混凝土结构中的钢筋具有弱腐蚀性；对钢结构具有中等腐蚀。4．旋喷桩施工技术标准旋喷桩的施工技术要求如下表：mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 序号项目名称技术标准检查方法1钻孔垂直度允许偏差≯1.0%实测或全站仪测钻杆2钻孔位置允许偏差50mm尺量3钻孔深度允许偏差±200mm尺量4注浆压力按设定参数指标查看压力表5桩体搭接＞200mm尺量6桩体直径允许偏差≤50mm开挖后尺量7桩身中心允许偏差≤0.2D开挖桩顶下500mm处用尺量，D为设计桩径8水泥浆液初凝时间不超过20小时9水泥土强度qu(28)≥1.2MPa。试验检验10水灰比0.7～1.0试验检验二、施工准备进场施工前，首先对施工场地进行开挖、清除地下障碍物，然后整平、夯实；同时合理布置施工机械、输送管路和电力线路位置，确保施工场地的“三通一平”。1、施工用电用水（1）根据工程所需机械动力设备、电气工具及照明电的数量，考虑到施工高峰阶段的机械设备最高用电需求量，主要借用中交一航局项目用电，必要时，采用发电机临时发电，可满足工程用电需要。2、施工技术（1）组织有关人员熟悉图纸和分项工程施工工艺，了解施工现场地上和地下建筑物及管线现状，作好充分的技术准备工作。（2）根据施工进度编制材料进场计划，材料部门根据材料计划进场采购，技术部门作好材料的进场检验工作。（3）在施工实践中，施工员、施工班长应随着设计和施工条件等因素的变化调整和补充完善施工方案。（4）测量定位：测量人员根据连续墙接缝处的坐标并结合连续墙的实际施工情况进行定位。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 3、现场布置本着因地制宜、便于施工的原则，科学有效的安排施工阶段工种、工段平行流水作业，将工程材料、设施作合理的场地安置和转移。三、施工工艺旋喷桩采用双管旋喷钻机,桩径为800mm,排距为600mm，行距为600mm（具体见旋喷桩加固布孔图），采用P.O.42.5级普通硅酸盐水泥，具体施工参数根据实际调整。施工工艺见图1。1、旋喷桩施工(1)试桩为保证成桩的效果，在开工前应先进行工艺性试桩。试桩应根据设备等相关参数进行确定，采用不同的压力、提升速度、旋转速度、水泥掺量等参数，各试1根桩，桩长不小于1m，在成桩一周后检查成桩效果，检查内容包括：成桩直径，桩体的连续性和均匀性，桩身强度等参数。最后根据设计的标准确定最终选取的参数。(2)定位放线施工前用全站仪标定旋喷桩施工的控制点，埋石标记，经过复测验线合格后，用钢尺和测线实地布设桩位，并用竹签钉紧，一桩一签，保证桩孔中心移位偏差小于50mm。桩机就位调平、对中清水泵试运转钻孔高压清水泵灰浆搅拌、过滤空压机钻进下沉至设计深度清水泵mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 试喷旋喷提升泥浆清理排出至设计桩顶标高停喷清洗注浆泵提钻头出孔口钻机移位回灌浆液图1旋喷桩工艺流程图(3)修建排污系统旋喷桩施工过程中将会产生10～20%的冒浆量，为此需要修建排污系统，将废浆液引入专设的沉淀池中，沉淀后的清水根据场地条件可进行无公害排放。(4)钻孔钻机就位后，对桩机进行调平、对中，调整桩机的垂直度，保证钻孔垂直度误差小于1.0%；造孔前应调试水泵、空压机、泥浆泵，使设备运转正常；校验钻杆长度，并用红油漆在钻塔旁标注深度线，保证桩体顶底标高满足设计深度。在钻孔机械试运转正常后，接通高压清水泵和空压机，使高压水压力达到30～33Mpa，流量60～80L/min，压缩空气压力达到0.6～0.8Mpa，在高压水和压缩空气的冲击力作用下，钻机旋转钻进。(5)下喷射管将高喷台车移至孔口，先进行地面试喷以调整喷射压力。为防止水嘴和气嘴堵塞，下管前可用胶布包扎。下喷射管至设计喷射深度。(6)制浆mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 选用P.O.42.5级普通硅酸盐水泥，水灰比1：1～0.65:1，根据每根桩的灰浆用量制作并充分搅拌，搅拌时间少于3分钟的不得使用，超过初凝时间的浆液也不得使用；灰浆经过两道过滤网的过滤，以防喷嘴发生堵塞；抽入储浆桶内的灰浆要不停地搅拌。(7)喷射提升　　在钻机钻到设计深度后，插入旋喷管，接通泥浆泵，然后由下向上旋喷，同时将泥浆清理排出。喷射时，先应达到预定的喷射压力、喷浆量后再逐渐提升旋喷管，以防扭断旋喷管。为保证桩底端的质量，喷嘴下沉到设计深度时，应在原地旋转10秒钟左右，待孔口冒浆正常后再旋钻提升。旋喷时的技术参数为：水泥浆：压力25～30Mpa，流量90L/min，水灰比1:1～0.65:1；旋喷管提升速度：15～18cm/min。旋转速度8～12r/min；喷嘴夹角180°在旋喷提升过程中，可根据不同的土层，及时调整旋喷参数。(8)回灌：喷射灌浆结束后，利用水泥浆进行回灌，直到孔内浆液面不下沉为止。(9)冲洗：喷射结束后，应及时将管道冲洗干净，以防堵塞。2、施工技术要点（1）旋喷桩施工钻孔采用旋转式钻机，注浆采用P.O.42.5的普通硅酸盐水泥，所用水泥各项测试技术指标须符合现行国家标准，水泥出厂期超过三个月，使用前应进行各项技术指标进行复查。（2）钻机开钻前必须用水准尺校平，保持机身平稳，就位后，钻杆与钻孔保持垂直，开孔直径为80mm，钻孔偏斜控制在1％，钻进时应保持中速，遇硬层应减速慢钻，以防卡钻。（3）注浆前应全面检查注浆设备与材料，包括注浆泵，拌浆储浆系统，高压注浆管压力表水电及其其他机械零件。在插管前先检查管路是否畅通，密封圈是否完好无损，丝口是否连接紧密，发现问题应立即修理或更换，以保证浆液体能按要求进入，插管到位后，先作高压试喷，调整参数达到要求方可进行喷浆作业。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt （4）拌浆人员应严格按配方配料，浆液应经过充分搅拌经筛网过滤后再不断的搅拌中予以注浆。喷射管下至设计深度，开始送入符合要求的气、浆。待浆液冒出孔口后，即按设计的提升速度、旋转速度，自下而上开始喷射、旋转、提升，到设计的终喷高度停喷，并提出喷射管。（5）正式注浆后切勿随意中断，力求连续作业，以保证成桩质量。并认真记录钻孔及注浆情况，做到全面、准确、及时、如实地反映情况。（6）因故停喷后重新恢复施工前，应将喷头下放30cm，采取重迭搭接喷射处理后，方可继续向上提升及喷射注浆，并应记录中断深度和时间。停机超过3h时，应对泵体输浆管中进行清洗后方可继续施工。（7）施工参数详见下表：序号项目参数1旋喷种类二重管旋喷2浆压25～30Mpa3气压0.6～0.8Mpa4转速12转/min5水泥浆流量≥40L/min6气流量60～80m3/h7提升速度150-180mm/min8浆液材料及配比42.5普硅水泥，水灰比1：1，水泥浆比重1.50g/cm33、施工质量检查高喷体施工作业过程质量检验包括孔位、孔斜、注入的浆液性能检验，回浆的浆液性能检验，喷嘴下入孔底深度检验，喷浆作业过程的压力、转速提升速度检验等每孔施工作业全过程的检验。高喷固结体质量检验方法采用钻孔取芯检查，在固结28天后进行。检验点的布置:①在地质情况复杂，可能对旋喷注浆产生影响的部位。②在桩与桩的搭接部位。检验工程数量:钻孔取芯的桩数为工程桩总数的2～5％，分别采用水平、边界、斜向三种不同的取芯方式进行取芯，每次取芯孔数mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 不少于2孔，当检验桩数的不合格率大于10％时，应倍增抽检高喷桩孔的数量，直到不合格率小于10％。对不合格者进行补喷成桩。所取芯样必须描述，其中50％的孔需取上、中、下三个部位的样品进行物理力学性能指标室内测试。合格标准为：芯样连续完整，为水泥浆混凝土结石。取样室内试验成果满足固结体的力学强度和抗渗要求。4、旋喷桩加固注意事项(1)施工前应对照图纸核实加固范围有无妨碍施工和影响安全的障碍物、地下管线，若存在障碍物影响施工时，则应与相关单位协商清除或迁移障碍物、地下管线。(2)旋喷桩的施工参数根据现场土质条件及试验结果可现场调整，并在施工中严格控制。(3)旋喷桩采用强度等级为42.5级以上普通硅酸盐水泥，根据现场实验室试喷结果可加入适量外加剂和掺合料。(4)施工与车站相邻两排旋喷桩时，应对车站围护、主体结构加强监测，如果车站围护或主体结构变形过大，应立即暂停施工并向相关部门反应。(5)旋喷桩施工完成后应严格进行质量检查，对不合格部位进行补喷或采取有效补救措施。(6)施工过程中做好旋喷施工的各种记录，及时了解选喷压力和流量变化情况并进行综合分析，判断旋喷效果是否满足设计要求。(7)在旋喷桩施工过程中，要做好各种机械设备和电路的检查工作，消除各种不安全因素的存在。(8)在拆除管路操作时应戴防护眼镜，以免浆液溅入人眼，并做好劳动防护，作业人员必须佩带胶手套。四、资源配备1、人力资源配备人员人数工作内容备注项目行政管理2对本分项工程的施工质量、安全、进度、文明施工、材料设备供应等全面管理包括生产经理施工队长技术人员2施工测量、技术交底、质量、安全检查、整理资料等技术管理工作工程部技术人员mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 造孔施工班6旋喷桩引孔施工两个班同时施工旋喷施工班5旋喷桩喷浆成桩两个班同时施工材料设备组3材料组织、设备维修后勤服务组2生活服务施工人员总计：20人本工程主要施工人员配备见下表。2、机械资源配备本工程施工中所需的各主要施工机械、机具见下表。设备名称型号功率(KW)数量外型尺寸（m）（宽×长×高）重量T钻机XPZ-50221／／搅拌机WJG-801522×2.5×1.51.2高喷台车CYP2014×6.5×168空压机YV6/83731.8×3.5×1.81.7灌浆泵HB80/10420.5×0.8×0.60.5高压清水泵TG75-37521.0×3.0×0.92.0五、工期计划一台引孔机一昼夜可引孔200m左右，喷射能完成120m左右，旋喷3600m，按工期43天计算，计划机械设备9月下旬进场9月28日正式开工，11月10日前完成。六、质量保证措施1、质量组织保证措施(1)健全质量保证体系，严格按照质量体系文件进行质量管理，做到从资源投入和过程控制上保证工程质量。质量保证体系见图2《质量保证体系框图》。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt (2)成立以项目经理为首的质量管理组织机构，严格在质量保证体系下进行管理，作业队以上单位成立全面质量管理小组，对主要工序的施工质量进行有组织的控制。配备专职的质检工程师和质检员，推行全面质量管理和目标责任管理，从组织措施上保证工程质量真正落到实处。(3)调集具有丰富施工经验和管理、技术过硬的队伍，选派优秀的技术管理人员和施工管理人员，配置一名业务水平较高、责任心较强的专职质量检验工程师负责端头加固施工。项目经理王书雄项目总工王海项目副经理王申宇质检员施工员技术员测量员试验员材料员机管员施工队图2质量保证体系框图2、质量技术保证措施为保证旋喷桩的施工质量，根据施工条件、设计要求和相关行业规范，拟采取如下质量保证措施达到施工质量目标。2.1引孔钻孔施工时应及时调整桩机水平，防止因机械振动或地面湿陷造成钻孔垂直度偏差过大。岩芯管长不小于2.0米。穿过砂层时，采用浓泥浆护壁成孔，必要时可下套管护壁，以防垮孔。2.2安放注浆管前，先在地表进行射水实验，待高压水、气、浆压正常后，才能下注浆管施工。2.3高喷施工分II序隔孔隔排施工，防止相邻高喷孔施工时串浆。相邻的高喷桩施工时间间隔不少于48小时。2.mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 4采用P.O.42.5普通硅酸盐水泥作加固材料，每批水泥进场必须出具合格证明，并按每批次现场抽样外检，合格后才能投入使用。水泥进场后，应垫高水泥台，覆防雨彩布，防止水泥受潮结块。2.5浆液水灰比采用1:1～0.7:1，浆液比重1.50～1.65kg/L，每米桩体掺入水泥250kg左右。施工现场配备比重计，每天量测浆液比重，实行定量加灰制，严格控制水泥用量。灰浆搅拌应均匀，并进行过滤。喷浆过程中浆液应连续搅动，防止水泥沉淀。2.6施工前进行成桩试验，在设计规定的范围内调整施工参数，保证成桩直径。2.7严格控制喷浆提升速度，其提升速度应小于0.18m/min。喷浆过程应连续均匀，若喷浆过程中出压力骤然上升或下降，大量冒浆、串浆等异常情况时，应及时提钻出地表排除故障后，复喷接桩时应加深0.4米重复喷射接桩，防止出现断桩。2.8高喷孔喷射成桩结束后，应采用含水泥浆较多的孔口返浆回灌，防止因浆液凝固后体积收缩，桩顶面下降，以保证桩顶标高满足设计要求。2.9因地下孔隙等原因造成返浆不正常，漏浆时，应停止提升，用水泥浆灌注，直至返浆正常后才能提升。2.10实行技术人员随班作业制，及时发现和处理施工中的质量隐患。认真如实填写施工报表，客观反映施工实际情况。2.11根据地质条件的变化情况及时调整施工工艺参数，以确保桩的施工质量。调整参数前应及时向业主、监理、设计部门报告，经同意后调整。2.12配备一台备用发电机组。旋喷桩施工，进入旋喷作业则应连续施工。若施工过程中停电时间过长，则启用备用发电机，保证施工正常进行。2.13施工现场配备常用机械设备配件，保证机械设备发生故障时，能够及时抢修。七、安全保证措施1、编制详细的安全操作规程、细则、制度及切实可行的安全技术措施，满足天津市安全生产要求。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 2、每一工序开始前，做出详细的施工方案和实施措施，报经监理工程师审批后，及时做好施工技术及安全技术交底，并在施工过程中督促检查，严格坚持特殊工种持证上岗。3、根据施工作业种类和特点，按照国家《劳动保护法》要求发放劳动保护用品。正确使用劳动保护用品。4、进行定期和不定期的安全检查，及时发现和解决不安全的事故隐患，杜绝违章作业和违章指挥现象，同时加大安全教育及宣传力度，对重点作业场所、危险区、主要地段设安全及警示标志。5、坚持每周安全日的安全学习制度。严格执行交接班制度，坚持工前讲安全、工中检查安全、工后评比安全的“三工制”活动。6、施工用电做到一机、一闸、一漏保。7、高压容器要经过鉴定后方可使用。8、经常检查高压浆管，发现破损及时更换。八、文明施工保证措施1、在施工队伍进场前，对职工进行宣传、教育。在施工过程中协调好与当地居民、当地政府的关系，共建文明窗口。2、加强对施工人员的文明施工宣传，加强教育，统一思想，使广大干部职工认识到文明施工是企业形象、队伍素质的反映，是安全生产的保证。增强现场管理和全体员工文明施工的自觉性。3、健全各项文明施工的管理制度，如岗位责任制、经济责任制、奖罚制度、会议制度、专业管理制度、检查制度、资料管理制度等。4、明确各级领导及有关职能部门和个人的文明施工的责任和义务，从思想上、行动上、管理上、计划上和技术上重视起来，切实提高现场文明施工的质量和水平。5、在现场施工过程中，施工人员的生产管理符合施工技术规范和施工程序要求，不违章指挥，不蛮干。对不服从统一指挥和管理的行为，按处罚条例严格执行。6、合理布置场地,各项临时设施必须符合标准要求，做到场地整洁、道路平顺、排水畅通、标志醒目、生产环境达到标准作业要求。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt 7、及时调整设备、机具和材料的位置，保证摆放整齐，保持工作面宽敞，提供良好的工作环境。施工现场坚持工完料清，垃圾杂物集中堆放，及时处理。施工废水严禁乱排，必须严格按照环保规定和招标、设计文件要求经处理达标后排放。mL.V1--volumeofthesampleusedfordeterminationofsulfuricacidsolution,mL.M--theweightofthesample,g.Suchaspoormeetstherequirements,takethearithmeticmeanoftheseconddeterminationasaresult.Allowanalysisofpersonnelsimultaneouslyorinquicksuccessionforthesecondusedfordeterminationoftheabsolutevalueofthedifferencebetweenthevolumeofsulfuricacidsolution.Thevaluedoesnotexceed0.1.(B)Spectrophotometricmethods(arbitrationlaw)1,theprinciple:inthepresenceofacatalyst,sulfuricacidstarchanditsderivativesandreactionproductsofalkali,anddistillingammoniarelease,andcollectedwithasulfuricacidsolution,addreagentusingspectrophotometerdeterminationofnitrogencontentammoniumsaltandturnedinto.Thismethodissuitablefornitrogencontentoflessthan0.025%(m/m)samplesofstarchanditsderivatives.2,reagentinthedeterminationprocess,onlyuseanalyticalgradereagentanddistilledwater,oratleastthepurityofwater.Concentratedsulphuricacid:96%(m/m),ρ20for1.84g/mL.Sodiumhydroxidesolution:40%(m/m),ρ201.43g/mL.Catalyst:formedbythe97gand3Gofpotassiumsulfateanhydrouscoppersulfate.Ammoniumsulfate.Standardsolutionofsulphuricacid:about0.1mol/Lcalibrationsolution.Nyquistreagents:atleasttwodaysbeforeuse,100giodideofmercury(ⅱ)and70glOOmLsolutionofpotassiumiodideinwater,theotherwill700mL244gpotassiumhydroxidedissolvedinwater1000mLbottleandmakeitcooltoroomtemperature.Theabovemercuryiodide(II)/potassiumiodidesolutionintothevolumetricflaskandslowly,...Inside,inthedark.3,apparatus,Kjeldahlflasks:volumetypicallybetween500~800mL.Digestion:theKjeldahlflasktotilt'