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时间:2020-12-16
《最新钻孔桩取芯后的芯孔填充方案讲课稿.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、钻孔桩取芯后的芯孔填充方案一、概况福建省莆田市人民检察院警示教育基地及技侦用房扩建工程中根据要求对桩基进行取芯复检。现在要对取芯检测留下的芯孔进行灌浆回填处理。二、施工工艺1、水泥浆配合比:具体为水泥∶水∶减水剂∶膨润土=1∶0.5∶0.014∶0.04。用等量的水泥替换膨润土后,得到本次灌浆的配合比为:水泥∶水∶减水剂=1∶0.48∶0.014。配制的水泥浆液要求28d强度为30MPa。2、采用水泥搅拌桶,按选定的水泥浆级配配制浆液。经计算芯孔的容量为0.75m3,实际配制时应按芯孔容量的1.5倍配制
2、。3、用一根φ25的尼龙高压管插入到芯孔底部。采用0.5~1.0Mpa的灰浆挤压泵(UBJ2.0型),连接尼龙管。正式注浆前,应先向孔底注入清水,以清理孔壁和孔底。清孔完毕后,配制水泥浆液,配制好的水泥浆液应静置5min,以稳定浆液,排出气泡。4、由于尼龙管较轻,为防止浮起,宜在尼龙管端部连接一段2寸的镀锌自来水管注浆。注浆管应深入到孔底,注浆过程应缓慢平稳,确保埋管。直到芯孔内的水从孔口全部排完,水泥浆液溢出孔口后开始提升尼龙管。边提升边补给浆液,直到尼龙管全部拔出,浆液满到孔口为止,结束注浆。5、试
3、块制作。现场应制作2组砂浆试块,规格为7.07×7.07×7.07cm,标准养护28天后试压。Unit1-5复习一用所给词的适当形式填空1.You’dbetterbrushyour (tooth)twiceaday.2.Therearesomany (passenger)onthebus,soit’sreallycrowded.3.Badluck!LittleJennycut (she)withaknifeyesterday.4.Whenshesawanoldwoman
4、(lie)onthesideoftheroad,shecalled120atonce.5.Atthattimetheyoungmanonlythoughtabout (save)alife.6.Moreandmorepeoplebegintorealizethe (important)ofthefoodsafety.7.Wehaven’tmadethe (decide)aboutwheretogoonvacation.8.The________(dead)ofthelittleg
5、irlmadehermotherverysad.9.Asweallknow,ahorsehasfour (foot).10.Therearemanypeople (lie)onthebeachandenjoyingthesunshinenow.11Mikehasthetennis (train)onFridayafternoon.12.Asavolunteer,Ihavea (feel)ofpride.13.Mr.Whiteisthe (own)ofabigfar
6、m.14.I’llneverforgetyour (kind),Mr.Smith.15.Wemustovercomeallthe (difficult)inlife.16.It’s (fair)nottotellherthetruth.17.Ifyouwant (develop)yourspeakingskills,youcanjoinanEnglishclub.18.NeitherJimnorhisfather (like)todochores.19.There
7、isnoneedforthechildren (buy)somanyclothes.20.Wedon’tmind (wait)foryouforanotherhour.21.LittleJimmystarted (learn)Englishwhenhewasonlythree.22.Whatareyourplansforthe (develop)ofyourcompany?23.InChina (compete)betweenchildrenstartsatayo
8、ungage.24.Afterschool,Ihavetotakepartinfootball (train).25.Kim,itistime (watch)TVnow.26.I’mnotgoing.FirstlyIhaven’taticket,and (second)Idon’tliketheplay.27.WhenIcameintotheroom,Ifoundhim (look)throughmydiar
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