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1、歡迎各位領(lǐng)導(dǎo)和專家蒞臨指導(dǎo)WELCOME2021/7/30淺層軟土地基快速動力固結(jié)技術(shù)Lowenergydynamicconsolidationcombinedwithlightwell-pointdewatering同濟(jì)大學(xué)地基基礎(chǔ)研究所InstituteofSoilFoundationTongjiUniversity2021/7/30概述IntroductionThismethodisapplicabletosandysoil,sandysilt,miscellaneousfill,etc.,thecoefficientofpermeabilityofwh
2、ichisrelativelyhigh(thecoefficientofpermeability,ko,islargerthan10-5).2021/7/302021/7/302021/7/30低能量強夯法結(jié)合輕型井點降水施工方案Lowenergydynamicconsolidationcombinedwithlightwell-pointdewatering1.加固效果和工期ReinforcingEffectandConstructionperiod2.低能量強夯法的加固原理reinforcementmechanismoflowenergydynamicco
3、nsolidation3.施工方案constructionscheme1).施工降水dewatering2).夯擊工藝參數(shù)tampingparametersandtechnique3).低能量強夯設(shè)備equipmentforlowenergyDCM4).收錘參考標(biāo)準(zhǔn)tamping-stopstandard5).檢測和信息化施工monitorandinformationconstruction6).施工程序和步驟constructionproceduresandsteps4.已成功的大面積施工中應(yīng)用實例casehistory2021/7/301.加固效果和工效R
4、einforcingEffectandConstructionEfficiency加固效果(ReinforcingEffect)Insandysoils,theSPTblowcount,N63.5,canreachto12~15;theCPTvaluecanreachto5~8MpaandthePLTbearingcapacityto150~200Kpa.加固深度(treatmentdepth)4-6m工效ConstructionEfficiency一個月大約能施工100,000m2,About100,000m2canbefinishedinonemonth.
5、2021/7/302.低能量強夯法的加固原理Reinforcementmechanismoflowenergydynamicconsolidation2021/7/302021/7/303.施工方案Constructionplan2021/7/301).施工降水dewatering場地降水采用真空強排水(well-pointdewatering),在地下水位降至地面下2.5m(undergroundwaterdewateredto2.5mbelowgroundsurface)以下時開始進(jìn)行第一遍強夯(firstpass)。。每遍強夯后進(jìn)行強排水dewateri
6、ngaftereachtampingpass2021/7/303).低能量強夯設(shè)備equipmentforlowenergyDCM履帶式吊車(25tcapacitytrackcrane),夯錘質(zhì)量(tamperweight)10~12t,錘底直徑(diameterofthetamperbottom)2.5m~3m套輕型井點降水設(shè)備lightwell-pointdewateringequipment2021/7/304).夯擊工藝參數(shù)tampingparametersandtechnique2021/7/305).收錘參考標(biāo)準(zhǔn)tamping-stopstanda
7、rd(1)夯坑周圍出現(xiàn)明顯隆起和側(cè)向位移generateapparentheaveorlateraldisplacement;(2)后一擊夯沉量大于前一夯沉量cratercausedbythelatterpoundingislargerthantheformerpounding(3)當(dāng)夯坑深度≥80cm時。Craterdepthismorethan(orequalto)80cm2021/7/306).檢測與信息化施工monitorandinformationconstruction(1)檢測內(nèi)容monitorcontenta.沉降觀測settlementmea
8、sureb.靜力觸探試驗CPTtest