旋喷桩施工技术交底 6页

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  • 2022-12-07 09:25:12 发布

旋喷桩施工技术交底

  • 6页
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施工技术交底主送单位日期工程名称施工图号施工部位基底处理(旋喷桩)里程桩号施工参数(1)水泥选用42.5普通硅酸盐水泥,孔径为60cm.(2)水泥掺入量选用按水泥掺量按26.2%,每米150kg/m的水泥参量进行施工。(3)施工时喷浆采用单管法施工(4)水灰比采用1:1。(5)布桩平面示意图如下:(6)喷浆量:70~100L/min(7)比重:1.45~1.5(8)旋转速度:20~25r/min(9)提升速度:20cm/min2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into\n施工准备(1)平整场地后测量技术人员测定整平后的地面高程;(2)检查起吊设备的平整度和导向架的垂直度,以确保水泥土桩的垂直度不超过1%。(3)现场按平面布置图布设桩位,桩间间距为1.2米,现场桩位布设完后及时报请现场监理工程师检查。(4)水泥提前进场,按试验原材料取样要求批次及时取样试验,并报监理见证抽检、审批。(5)钻机施工要求对位准确、钻塔垂直、桩间距误差不大于50mm,垂直度偏差不大于1.0%。施工步骤(1)施工准备和相关要求①绘制桩位平面布置图,并报监理工程师审批,平面布置图(见附图1)②机械设备的报验。③必须使用经过标定的计量设备,并提供相关证书。④必须提供机械操作人员的特种操作证书。⑤平整场地后测量技术人员测定整平后的地面高程。⑥检查设备的平整度和导向架的垂直度,以确保桩的垂直度不超过1%。(2)现场按平面布置图布设桩位,桩位在平面上呈矩形布置,桩间间距为1.2米,现场桩位布设完后及时报请现场监理工程师检查。桩位检验合格后方可进行施工。(3)水泥提前进场,按试验原材料取样要求批次及时取样试验,并报监理见证抽检、审批。(4)钻机施工要求对位准确、钻塔垂直、桩间距误差不大于50mm,垂直度偏差不大于1.0%。(5)钻机就位后,按所要求的钻进速度均匀钻至设计桩底,钻至桩底标高后应先达到预定的喷射压力和喷浆量在桩底喷浆1分钟后,再逐渐匀速提升。提升至设计高度时应进行1~2分钟的低压补浆(5Mpa),成孔后移动钻机。工艺流程:平整原地面→钻机定位→钻杆钻至设计深度→喷浆→匀速提钻旋转喷浆→提升至设计高度后补浆→成孔→钻机移位。(6)制备好的浆液不得离析泵送必须连续。拌制水泥浆液的灌数、水泥、及泵送浆液的时间、喷浆量及搅拌深度必须专人记录。(7)喷浆提升的速度必须符合施工工艺的要求,并应有专人记录。(8)施工中发现浆量不足,应进行整桩复打,复打时的喷浆量应不小于设计用量。如中途喷浆中断,必须复打,复打重叠孔段应不小于0.1m2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into\n(9)严格按水泥浆配合比配置水泥浆,严禁偷工减料现象发生。(10)送浆、停浆必须有明确信号施工工艺及流程1、施工平台测量放样,搅拌机定位对中,保持设备水平,钻机主轴垂直误差不大于1.5%。2、制备水泥浆:按设计水灰比拌制水泥浆,压浆前将水泥浆倒入集料斗中。3、钻孔前准备:钻机对位后,校正钻杆垂直度,钻进前先作射水和通气试验,检查管道和喷嘴是否通畅。4、钻孔:射水压力可为1MPa,防止水压过大冲塌孔壁。5、旋喷:喷射时应先达到预定的喷射压力和喷射量,在桩底旋喷1分钟后,在逐渐提升,提升速度20cm/min,旋转速度20~25r/min。旋喷过程中应注意冒浆量的量测,冒浆量宜控制在10%~25%。旋喷过程中拆卸钻杆后继续旋喷时,应控制与前段搭接50cm以上。提升至设计高度时应进行1~2分钟的低压补浆(5Mpa)。6、清洗,加入适量清水,清洗管路中的残浆和钻头上的软土。7、钻具提升地面后,钻机移位对孔,按上述步骤进行下一根桩的施工。8、施工工艺流程图见下图:整平场地,放孔位钻机就位检测就位情况和钻杆垂直度钻杆钻至设计深度配置水泥浆喷浆匀速提升喷浆提升至设计高度后补浆成孔洗孔移动钻机2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into\n质量控制1、桩位及桩高程的控制桩位:施工前由现场测量人员放出桩中心点,并打出桩位标,由测量监理校核(要求桩位偏差不大于5cm)。桩顶、桩底高程:要求桩底高程超深10~20cm,桩顶高程超高10cm。桩深垂直度:每根桩施工时,根据导向架的吊锤偏移用米尺测定搅拌轴垂直度,从而测定桩身垂直度(要求桩身垂直度偏差不超过1.5%)。2、水泥掺量及浆液控制桩身水泥掺量:水泥掺量是桩身质量的主要影响因素之一,在试桩施工过程中时一定要根据水泥掺量。应根据由实验桩所定的水泥掺量,检查每根桩的水泥用量。水泥标号:根据设计要求选用水泥。经场后水泥必须检验合格后方可使用。浆液:通过特制的制浆桶水的体积核选定的水灰比,确定每次制浆加入的水泥量。制备好的浆液不得离析、不得停置时间过长,超过2小时的浆液不再使用。水泥浆液搅拌均匀性:贮浆池内浆液应均匀,输送时应确保其连续,喷浆搅拌时,若输浆管道堵塞或爆裂,应及时组织处理,时间过长应换浆。3、喷浆控制喷浆时的提升速度也是影响搅拌桩质量的主要因素之一,施工时严格控制提升速度不大于0.2m/min。喷浆旋转速度在20~25r/min。喷浆压力在22~25Mpa左右。喷浆过程中如出现压力骤然下降或上升或冒浆异常情况时,应立即停止注浆作业,待查明原因,采取相应措施后在施工。在次喷浆时,应将喷射管下至原停喷深度以下50cm。4、旋喷桩质量控制项目项次检查项目规定值或允许偏差检查方法和频率1桩径(mm)不小于设计值抽查1%且不少于2处;挖探50~100cm,钢尺丈量2桩体间距(mm)±100mm抽查1%,且不少于5处;钢尺丈量3垂直度(mm)不大于1.5%检测2%且不少于2根;经纬仪测量钻杆垂直度4桩长(mm)不小于设计值尺量钻杆长度刻线;必要时钻芯检查5竖直度%1.0%查施工记录6单桩喷浆量符合设计查施工记录7复合地基载荷0.15Mpa总桩数的2‰,监理单位见证检验;平板载荷试验8抽心检验90天无侧限抗压强度大于2.5MPa2%,且不少于2根;在桩顶1m以下截取设计规定龄期的试件作无側限抗压强度试验。2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into\n安全保证措施1、没有签订合同、施工安全配合协议不准施工。2、没有召开现场施工交底会不准施工。3、施工人员未经培训和持证上岗不准施工。4、施工负责人和把关干部没有到岗不准施工。5、驻站联络员和施工防护人员不到位不准施工。6、施工配合人员不到岗不准施工。7、安全监督和质量监理人员没到岗不准施工。8、施工人员必须戴黄色安全帽,穿黄色防护服背心。施工人员严禁在运营线范围内戴红色安全帽,穿红色衣服。9、严禁施工机具、材料以及临时设施侵入界限(正线直线段距线路中心2.44m,正线曲线为2.9m),严禁施工人员上、下班时在线路及轨道上行走、横跨运营线或坐、卧轨道上休息。10、对受地形影响,驻地到工地必须走运营线时,要求走人行通道(人行步板),严禁在线路、路肩等限界范围内行走。发现列车接近时,须及时避让,其他人员严禁进入运营线范围。11、临近运营线施工时,场地严禁悬挂红色标语,彩旗尽量减少红色和绿色,以免影响司机瞭望。在施工过程中,必须由跟班防护员进行跟班防护。12、严禁施工人员擅自挪移和破坏防护设施,严禁夜间在运营线附近生火。13、列车通过时大型机械暂停施工14、实行一机一防护原则,配备进过昆明铁路局安全培训的人员进行防护。15、禁止穿拖鞋及高跟鞋进入现场,进入现场必须佩带安全帽16、施工过程中喷浆管两侧禁止人员停留。17、施工过程中必须设置拦浆设置避免浆液进入既有排水沟污染环境。18、施工前必须确认安全标牌、提示标牌、安全设备是否未安装或是否损坏。19、非作业人员禁止进入场地20、项目部施工负责人、领工员、技术人员不到场禁止擅自施工,交警配合人员不到场禁止擅自施工。21、在装渣的过程中,挖机操作手避免将斗上的渣土落入公路,影响行车。22、装渣时尽量避免占道(行车道)施工。23、渣土外运后如有漏渣必须及时清理。24、机械操作手必须持有机械操作证件。25、装渣时,操作手施工不易过快,不易过急。26、现场必须有应急物资及应急设备。27、清理完的渣及时运出场地。28、禁止污水流入公路,如有污水流入公路及时清理。随时观察公路是否有变化。的2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into\n2424.1reagentpotassiumiodide(500g/L)+thiourea(50g/L)(1+1).24.2thesodiumhydroxidesolution(400g/L)andthesodiumhydroxidesolution(100g/L).24.3sulfuricacid(1+1).24.4absorbent24.4.1thesilvernitratesolution(8g/L):4.07ggofsilvernitratein500mLbeaker,addalittlewaterdissolves30mLnitricacid,addwaterto500mLandstoredinaBrownbottle.24.4.2polyvinylalcoholsolutions(4g/L):weighing0.4gpolyvinylalcohol(degreeofpolymerizationof1500~1800)inasmallbeaker,add100mLofwater,heatedinboilingwaterbathandstiruntildissolved,thermal10min,outcold.24.4.3absorbent:17.4.a1and17.4.2,addonevolumeofethanol(95%),mixastheabsorbent.Usematch.24.5potassiumborohydride:potassiumborohydrideandsodiumchloridemixedin1:4qualitythanground,afteryoumixinthetabletcomputermade10MM,4mmtablets,eachpieceis0.5G.Avoidpressureinwetweather.24.6leadacetate(100g/L)cotton:absorbentfoaminleadacetatesolution(100g/L),squeezeexcesssolutionafterafewminutes,spreadoutcotton,80℃afterdryingstorageinthewide-mouthglassbottles.24.7citricacid(1.0mol/L)-ammoniumcitrate(1.0mol/L):weighing192gammoniumcitratecitricacid,243g,dilutedwithwaterdissolvesto1000mL.24.8arsenicstandardreservesliquid:saidlearn105℃dry1handresetdrydeviceinthecoolingtoatroomtemperatureofthreechloridearsenic(As2O3)0.1320gYu100mLbeakerinthe,joined10mLhydrogenoxidationsodiumsolution(2.5mol/L),staydissolvedHoujoined5mLperchlorate,and5mLsulfuricacid,andresetelectricBoardShangheatingtotakewhite,coolingHou,into