淺層軟土地基快速動力固結(jié)技術(shù)圖文并茂

淺層軟土地基快速動力固結(jié)技術(shù)

Lowenergydynamicconsolidationcombinedwithlightwell-pointdewateringXX地基基礎(chǔ)研究所

2023/4/29概述IntroductionThismethodisapplicabletosandysoil,sandysilt,miscellaneousfill,etc.,thecoefficientofpermeabilityofwhichisrelativelyhigh(thecoefficientofpermeability,ko,islargerthan10-5).2023/4/292023/4/292023/4/29

低能量強(qiáng)夯法結(jié)合輕型井點(diǎn)降水施工方案

Lowenergydynamicconsolidationcombinedwithlightwell-pointdewatering1.加固效果和工期ReinforcingEffectandConstructionperiod

2．低能量強(qiáng)夯法的加固原理reinforcementmechanismoflowenergydynamicconsolidation3．施工方案constructionscheme1）.施工降水dewatering2）.夯擊工藝參數(shù)tampingparametersandtechnique3）.低能量強(qiáng)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(shí)例casehistory

2023/4/291.加固效果和工效

ReinforcingEffectandConstructionEfficiency

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(gè)月大約能施工100，000m2，About100,000m2canbefinishedinonemonth.2023/4/292．低能量強(qiáng)夯法的加固原理Reinforcementmechanismoflowenergydynamicconsolidation2023/4/292023/4/293．施工方案

Constructionplan

2023/4/291）.施工降水dewatering場地降水采用真空強(qiáng)排水(well-pointdewatering)，在地下水位降至地面下2.5m(undergroundwaterdewateredto2.5mbelowgroundsurface)以下時(shí)開始進(jìn)行第一遍強(qiáng)夯(firstpass)。。每遍強(qiáng)夯后進(jìn)行強(qiáng)排水dewateringaftereachtampingpass2023/4/293）.低能量強(qiáng)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(diǎn)降水設(shè)備lightwell-pointdewateringequipment2023/4/294）.夯擊工藝參數(shù)

tampingparametersandtechnique2023/4/295）.收錘參考標(biāo)準(zhǔn)

tamping-stopstandard（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(shí)。Craterdepthismorethan(orequalto)80cm2023/4/296）.檢測與信息化施工

monitorandinformationconstruction

（1）檢測內(nèi)容monitorcontenta．沉降觀測settlementmeasureb．靜力觸探試驗(yàn)CPTtestc．孔隙水壓力觀測waterpressuremonitord．地下水位觀測groundwatermonitor2023/4/29（2）信息化施工informationconstructiona.降水的信息化施工informationconstructionfordewateringi出水量控制dischargecontrolii地下水位監(jiān)控waterlevelmonitorandcontroliii靜力觸探檢測CPTtest根據(jù)以上項(xiàng)目的測試結(jié)果，動態(tài)調(diào)整抽水時(shí)間、井點(diǎn)管排距、每遍夯擊間隔時(shí)間等施工參數(shù)。Basedonthemonitoringresultoftheabove-mentioneditems,adjustthepumpingtime,rowspacingofthewellpipe,timeintervalofeachpass,etc.2023/4/29b.低能量強(qiáng)夯效果的信息化施工informationconstructionforimprovementeffect

I地下水位和孔隙水壓力監(jiān)控waterlevelmonitorandcontrolaswellaswaterpressureii靜力觸探檢測CPTtestiii沉降觀測settlementmeasure根據(jù)以上項(xiàng)目的測試結(jié)果，動態(tài)調(diào)整夯擊能量、夯擊間距、每遍夯擊間隔時(shí)間等施工參數(shù)。Basedonthemonitoringresultoftheabove-mensioneditems,adjustthetampingenergy,spacingoftampingpoints,timeintervalofeachpass,etc2023/4/297）.施工程序和步驟

constructionproceduresandsteps1.平整場區(qū)，布設(shè)強(qiáng)排水管線，并在施工場地四周挖設(shè)明溝。Levelthesite,installwell-pointpipes,anddigwaterfurrowaroundtheconstructionsite2.預(yù)埋孔隙水壓力計(jì)和水位管。Embedpiezometersandwaterlevelpipes3.降水dewatering：夯擊前地下水位排至吹砂面下2.5m以下。Drainuntilthewaterlevellowersto2.5mbelowthegroundbeforetamping4.測定地面沉降、孔隙水壓力和地下水位的初始讀數(shù),采用信息化施工法,調(diào)整抽水參數(shù).measuretheoriginalsettlement,waterpressureandwaterlevel,adjusteddewateringparameter2023/4/295.夯擊tamping：按上述夯擊工藝進(jìn)行夯擊，每遍夯后，進(jìn)行地面沉降、孔隙水壓力、地下水位觀測和靜力觸探測試,必須采用信息化施工法，Mustconductinformationconstructionbasedontheabove-mentionedtampingparametersandtechnique.6.相鄰兩遍夯擊間歇時(shí)間暫定為7～14天，具體應(yīng)根據(jù)孔壓消散情況確定。Predeterminedtimeintervalofeachpassis7d~14d,whichcouldbeadjustedbasedonthedissipationofwaterpressure7.推平和適當(dāng)碾壓levelandroll8.強(qiáng)夯施工結(jié)束后15天和30天，進(jìn)行靜力觸探檢測conductCPTtestafter15dand30doftampingend2023/4/292023/4/294.僵已成功奏的大面燭積施工許中應(yīng)用仔實(shí)例（1）XX港外高橋衛(wèi)港區(qū)四期狗工程地基處蝕理XX港外四翅期C2區(qū)和B區(qū)（60多萬平方姜米,表層濱1-2m為吹填厭砂,以粒下為淤上泥質(zhì)土輕）軟基謠處理采科用低能濁量強(qiáng)夯殼施工方洽法，獲喪得成功脈，己通取過由XX市科委知組織的同專家組研通鑒定號，認(rèn)為梁達(dá)到國更際先進(jìn)彎水平，陸目前正乖在申報(bào)XX市科技成童果。Soft旺soi湊lim互prov殖emen娘tof汁C2錯area撒and葵Ba做rea事ofW喂aiga卸oqia駁o4’聽Proj尸ect變ofS信hang丘hai夢Term貌inal煉Con鼠tain啞er(m燒ore固than冶600杏tho屆usan侍dm2,hy制drau壇lic爛sand集1~2字m,v引ery罷soft辨cla擦yun減derl棉ying奇)is將con敬stru臣cted宣by糠appl襪ying褲the援low津ene們r(jià)gy幣Dyna浩mic甚cons搬olid輪atio怨nme幅thod場com賄bine珍dwi劫thw登ell-凍poin屯tde竊wate兆ring席.Th巷eim抗prov榆ede損ffec泊tis灑sig界nifi而cant淋and冶con耗stru側(cè)ctio旅nha災(zāi)sga漂ined苦suc言cess202道3/4同/242023鞠/4/2喂4202防3/4斬/242023菌/4/2高42023竟/4/2撐42023閉/4/2篩42023稼/4/2疑4202伍3/4求/242023掛/4/2誰4202筆3/4柜/24202氣3/4畏/242023嬸/4/2撕4（2）XX外高橋港雀區(qū)多用途液碼頭工程俘堆場地基瘦處理地基處理呀面積14蔑8.3萬嘉平方米，敬陸域吹填剪方630寬萬方，主標(biāo)要道路面熊積29萬勾平方米，蚊回填細(xì)砂厚度2-搞6米。地基處臂理方法塑：（1躲）不外趣加粗填浩料低水葛壓振沖機(jī)；（2勤）低能枯量強(qiáng)夯諒結(jié)合強(qiáng)岡排水202至3/4啊/24（3）X