惠州建筑工程设计院

中英文地勘(地质勘查)报告(20180722232626)

 

1页共21页第一章工程概况1.Projectprofile工程名称:Projectname:工程地点:Position:拟建工程概况:拟建厂房一间,南北长154.11m,东西宽105.28m,局部宽136.77m,为1层钢结构,局部2~3层,拟采用独立柱基础,柱间距约10m,厂房内设有8吨吊车,基底压力约50kPa。厂房中部设有2座高货架,货架基底压力约为120kPa,高货架部位独立柱基础基底压力按200kPa考虑。厂房内局部有地下室,埋深约5.0m。Proposedprojectintroduction:One-storyProductionhall(PH)issteelstructure,someareahasmezzaninefloor.ThelengthofPHfromnorthtosouthis154.11m,andthewidthfromeasttowestis105.28m,partlythewidthis136.77m.Thecolumndistanceisabout10mwithproposedindependentfoundation.AmongthePH,thereare8-toncranesinsomearea,andthesubgradereactionisabout50kpa.InthemiddleofPH,thesubgradereactionofthetwohighrackstorageisabout120kpa.Inthepressurearea,thebottomelevationofthebasementisaboutEL-5.000m.勘察阶段:详细勘察。Stage:detailedinvestigationstage

2页共21页岩土工程勘察等级:根据《岩土工程勘察规范》GB50021-2001第3.1.1条~第3.1.4条,该工程重要性等级为三级,场地等级为二级,地基等级为二级,勘察等级为乙级。Degree:DegreeofimportancefortheproposedprojectisClass3,andthatofcomplexityofthesiteandthefoundationisalsoClass2,accordingtotheCodeforGeotechnicalEngineeringInvestigationGB50021-2001(3.1.1~3.1.4),wedefinethisgeotechnicalengineeringinvestigationasClassB.勘察任务及要求:Taskandrequirementoftheinvestigation1.查明拟建场地范围内岩土层的类型、深度、分布、工程特性,提出详细的岩土工程资料,为设计和施工提供所需的各种参数;Identifycomposition,distributionrules,depthandengineeringgeologicfeaturesofthefoundationsoilswithintheexplorationdepthattheproposedsite.Toprovidedetailcomprehensivephysical&mechanicalparametersofeachstratum,designparametersofgroundbearingcapacityandpilefoundationbearingcapacity,andgeotechnicalparametersrequiredforfoundationsettlementcalculation.2.查明地下水的埋藏条件、水位、变化幅度,判定地下水(土)对建筑材料的腐蚀性;提供场地标准冻结深度;2.Identifyembedmentstatus,type,watertableandevolutionofundergroundwater,andevaluatethecorrosivenessdegreeofsitesoilandgroundwatertobuildingmaterials.Providethestandardfrozendepthof

3页共21页thesoilatproposedsite.3.确定场地土的类型及建筑场地类别、判定饱和粉土及砂土的液化可能性;3.Specifysiteclassificationandzoningofthesiteintosections.Toidentifydistributionstatusofsaturatedsiltysoilandsandysoilandassessitsliquefactionpotentialandliquefactiondegree.4.对地基的稳定性、均匀性、承载力问题进行评价;4.Giveabriefevaluationaboutthestability,uniformityandbearingcapacityofthesoilfoundation.5.查明场地内不良地质作用类型的成因、分布范围、发展趋势及危害程度,并提出评价与整治方案及建议;5.Identifythecause,distributionrange,developmenttrendandextendofdamageofdefectivegeologicalenvironmentonsite.Alsoprovidetheevaluationandrelatedtreatmentscheme.6.选择合理的基础类型及埋深;如使用桩基,选择最佳桩端持力层,提供桩基参数。6.Recommendandselectsuitabletypeanddepthofthefoundation.Selectthebestloadbearingstratumandprovidethepileparametersifpilefoundationbeadoptedontheproject.布孔原则及实施:根据甲方提供的建筑总平面图,依据《岩土工程勘察规范》GB50021-2001第4.1.11条~第4.1.20条之规定,本次勘察在建筑物边线、角点共布设36个勘探点,其中生产车间荷载较小,按天然地基考虑,勘探孔深度10.0m~15.0m;高货架部位荷载较大,按复合地基考虑,勘探孔深度20.0m~25.0m。具体布孔

4页共21页详见“勘探点平面布置图”,各孔深度等见“勘探点一览表”。Workscopeandrules:Basingonthearchitecturallayoutfromtheclient,andaccordingtotheCodeforGeotechnicalEngineeringInvestigationGB50021-2001(4.1.11~4.1.20),wearrangedtotally36holesonsite.ThedepthofboringholeinmostareaofPHis10~15m,belongtonaturalsoilfoundationwithnormalload.Butforthehighrackstoragearea,thedepthofboringholeincreasedto20~25m,belongtocompositesoilfoundationwithrelativelylargeload.DetailinformationPLSsee“boringholelayout”and“boringholesheet”.勘探方法:采用钻探取样、标准贯入试验和静力触探相结合勘探方法Investigationmethods:Adoptsacombinationofboreholesampling,in-situtest(SPTandCPT).1、钻探:采用DPP100-3E型汽车钻机,回转式螺旋钻头钻进,地下水位以上干钻,回次进尺不大于1m。采用活塞式取土器,静压法采取土样,取样前需清孔,孔底残留浮土厚度不得大于取土器上端废土段长度,遇砂层可采用套管护壁或岩芯管钻进,水位以下可采用泥浆护壁,开孔直径150mm,终孔直径不小于110mm。1.Boring:Usingdrillingtruck(DPP100-3E),Rotaryscrewdrill,drillingatcirculationbreakabovetheundergroundlevel,footage<1m.SamplethesoilonStaticpressuremethodbyPistontypesoilsampler.Theholesneedtobecleaned,andthelengthofremainedcappingmassontheholebottomshouldlessthantheredundantsoillengthonthetopof

5页共21页thesampler.Casinghole-boringmethodcanbeadoptedtodrillthroughthesandlayer,andslurrywallcanbeusedunderthegroundwater.Thediameterofthebeginningholeis150mm,andthefinaldiametershouldbenolessthan110mm.2、静力触探:采用单桥探头,微机自动处理,要求每0.1m采集一组数据。2.CPT:Conepenetrationtestisdonebysingle-bridgesensor.Thedataiscollectedandrecordedautomaticallywiththeperiodofeveryper0.1mbymicroprocessor.3、标准贯入试验:锤重63.5kg,落距76cm,预打15cm,贯入深度30cm,采用自动脱钩、自动落锤,清孔后换用标准贯入器并量得深度尺寸。先击入15cm不计击数,再记录后30cm中的每10cm的锤击数.3.InSPT,a63.5kgheavyhammerisused,andthedroppingdistanceis76cm.Atthebeginning,15cmdistanceisprepared.Thehammerisautomaticallyunhookedandfallingfreely.Noblowcountisloggedforthefirst15cmpenetration.Blowcountsarerecordedinsubsequent10cmintervalinthe30cm.勘探依据:1、《岩土工程勘察规范》GB50021-2001(2009年版)CodeforGeotechnicalEngineeringInvestigationGB50021-2001Edition2009NationalstandardsofPRC2、《建筑地基基础设计规范》GB50007-2011

6页共21页CodeforBuildingFoundationDesignGB50007-2011NationalstandardsofPRC3、《建筑抗震设计规范》GB50011-2010CodeforSeismicDesignofBuildingsGB50011-2010NationalstandardsofPRC4、《中国地震动参数区划图》GB18306-2001SeismicgroundmotionparameterzonationmapofChinaGB18306-20015、《静力触探技术标准》CECS04:88TechnicalStandardforConePenetrationCECS04:88Industrystandard6、《建筑工程地质勘探与取样技术规程》JGJ/T87-2012StandardforSoilinvestigationandsampling,JGJ/T87-2012Industrystandard7、《土工试验方法标准》GB/T50123-1999StandardforSoilTestMethodGB/T50123-1999NationalstandardsofPRC8、《建筑地基处理技术规范》JGJ79-2002Standardforfoundationtreatmenttechnology,JGJ79-20029、《建筑工程抗震设防分类标准》GB50223-2008StandardforClassificationofSeismicProtectionofBuildingConstructionsGB50223-200810、《工业建筑防腐蚀设计规范》GB50046-2008Codeforanticorrosionondesignofindustrialconstruction,GB50046-2008

7页共21页11、《河北省建筑地基承载力技术规程》DB13(J)/T48-2005TechnicalcodeforbuildingfoundationbearingcapacityinhebeiprovinceDB13(J)/T48-200512、《房屋建筑和市政基础设施工程勘察文件编制深度规定》DepthsurveyanddocumentationregulationsofHousingconstructionandmunicipalinfrastructureprojects外业时间:2013年4月3日进场,当日完成全部外业工作。Fieldoperation:AlltheoperationworkfinishedOnthewholedayof2013/4/3.标高依据:本次勘察采用北京54坐标系和相对高程,以甲方提供的场地红线西北角A1(X=4377948.110,Y=480122.536)与西南角A2(X=4377740.922,Y=480165.755)作为两个控制点,测放各孔位的固定坐标,以场地西南角爱民东道路中心一点为假定高程0.00m,据此实测各孔口相对标高。Elevationsystem:AdopttheBeijing54coordinatesystemandrelativeelevation.Alltheexplorationpointsoftheboringholearesetoutbasinguponthetwocontrolpointswhichprovidedbytheclient.TheyareA1,onthenorth-westcorner(X=4377948.110,Y=480122.536),A2onthesouth-westcorner(X=4377740.922,Y=480165.755).Therelativeelevationsystemisadoptedfortheheightsurvey.OnebasepointinthemiddleofEastAiminRoad(South-westtothesite)istakenasbenchmarkforheightsurvey,anditselevationisassumedas0.00mm.

8页共21页场地工程地质条件EngineeringGeologicalConditionalofthesite一、地形、地貌场地属河流冲积平原区,地势较平坦,地貌单一。孔口相对标高为-0.33~0.52m,高差0.85m。FeaturesoftheGeomorphologyandLandformThesiteislocatedinriverflatarea.Itsterrainisrelativelyflatanditslandformissingletype.Elevationofnaturalgroundsurfacewhereallexploratoryholesareconcernedrangesfrom-0.33mto0.52m(relativeelevation,thesamebelow),altitudedifferenceis0.85m.二、地层岩性及工程地质特性Featuresoffoundationsoils勘探深度范围内揭露天然地层属第四系全新统(Q4)河流冲积地层,土质以粘性土、粉土和粉细砂为主,表层为耕植土。根据土质特征和力学性质,由上至下共划分为8个地层单元和2个亚层。其工程特性分层描述如下:TheinvestigationshowedthatthesurfacelayeroftheplannedconstructionsiteisclassifiedasQ4intheriverflatarea,whichiscomposedofclay,siltandclaysand,topsoilisarablesoil.Withintheinvestigationdepth,thesoillayersofplannedconstructionsitecouldbedividedintoeightengineeringgeologiclayers,twosub-layers,whicharedescribedindetailsasfollows:

9页共21页1层耕植土:以黄色粉土为主,夹粉质粘土,土质不均,层厚0.5~1.5m;Layer1Topsoil:thislayermainlyconsistsofyellowishsilt,mixedupthinlayersofsiltyclay,unevenpropertieswithathicknessrangingfrom0.5~1.5m.2层粉土:黄色,稍湿~湿,中密,摇振反应迅速,断面无光泽,干强度和韧性低,夹粉质粘土薄层。承载力特征值fak=110kPa;Layer2Silt:mixedthinlayersofsiltyclay.yellow,slightwet-wet,middledense,swingreactionisrapid,noglossincutting,lowindrystrengthandlowintoughness,Theloadfeaturefak=110kpa.③1层粘土:黄色~黄灰色,软塑,高压缩性,无摇振反应,断面有光泽,干强度和韧性高,夹粉土薄层。承载力特征值fak=90kPa;Layer3.1clay:mixedthinlayersofsilt.Yellow-yellowgray,softplasticity,highcompressibility,noswingreaction,cuttingglossily,highindrystrengthandhighintoughness,Theloadfeaturefak=90kpa.③层粉质粘土:黄灰色~灰色,可塑,中~高压缩性,无摇振反应,断面稍有光泽,干强度和韧性中等,夹粉土薄层,夹礓石。承载力特征值fak=110kPa;Layer3siltyclay:mixedthinlayersofsiltandgingernut.Yellowgray-gray,plasticity,middle-highcompressibility,noswingreaction,cuttingratherglossily,middleindrystrengthandmiddleintoughness,Theloadfeaturefak=110kpa.④层粉细砂:黄灰色~灰色,饱和,中密~密实,成份以石英、长石为主,含云母,夹粉土薄层。承载力特征值fak=160kPa;

10页共21页Layer4finesiltysand:mixedthinlayersofsilt.Yellowgray-gray,saturation,middlecompressibility-dense,mainlyconsistsofquartzandfeldspar,containingmica,Theloadfeaturefak=160kpa.⑤层粉质粘土:灰色~黄色,可塑,中压缩性,无摇振反应,断面稍有光泽,干强度和韧性中等,夹粉土薄层。承载力特征值fak=120kPa。Layer5siltyclay:mixedthinlayersofsilt.gray-yellow,plasticity,middlecompressibility,noswingreaction,cuttingratherglossily,middleindrystrengthandmiddleintoughness,Theloadfeaturefak=120kpa.⑥层粉土夹粉砂:黄色,湿,密实,摇振反应迅速,断面无光泽,干强度和韧性低,夹粉砂层,夹粉质粘土薄层。承载力特征值fak=150kPa;Layer6silt+siltysand:mixedthinlayersofsiltyclay.yellow,wet,dense,swingreactionisrapid,noglossincutting,lowindrystrengthandmiddleintoughness,Theloadfeaturefak=150kpa.⑦层粉质粘土:黄色,可塑,中压缩性,无摇振反应,断面稍有光泽,干强度和韧性中等,夹粉土薄层。承载力特征值fak=130kPa。Layer7siltyclay:mixedthinlayersofsilt.yellow,plasticity,middlecompressibility,noswingreaction,cuttingratherglossily,middleindrystrengthandmiddleintoughness,Theloadfeaturefak=130kpa.⑦1层粉土:黄色,湿,密实,摇振反应迅速,断面无光泽,干强度和韧性低,见锈斑,承载力特征值fak=140kPa;Layer7.1silt:yellow,wet,dense,swingreactionisrapid,noglossincutting,lowindrystrengthandmiddleintoughness,rustspot,Theloadfeaturefak=140kpa.

11页共21页⑧层粉砂夹粉土:黄色,饱和,中密,成份以石英、长石为主,含云母,夹粉土层,夹粉质粘土薄层。承载力特征值fak=180kPa;Layer8siltysand+silty:mixedthinlayersofsiltyclay.Yellow,saturation,middlecompressibility,mainlyconsistsofquartzandfeldspar,containingmica,Theloadfeaturefak=180kpa.土层的具体空间分布形态详见“工程地质剖面图”,各土层厚度及层底标高见“地层统计表”。Thedetaileddistributionofsoillayersrefer“thesectiondrawing”,andthethicknessandbottomelevationofeverylayerrefer“soillayerindexsheet”三、地基土的物理力学指标统计分析AnalysisandAssessmentofFoundationSoils此次勘察采集了大量土样,依据《土工试验方法标准》GB/T50123-1999规范进行室内试验,根据土工试验结果,各层土的物理力学指标,经可靠性和适用性分析进行数理统计,提供平均值、标准差等参数,见“物理力学指标统计表”。根据三轴剪切试验及直剪试验结果,并结合工程经验给出基底下,一倍基础宽度范围内土层φk、Ck标准值的建议值,见下表:AccordingtotheStandardforSoilTestMethodGB/T50123-1999,alotofthesoilsamplesfromtheproposedsitearetestedinlaboratory.Analysisandstatisticsofphysical&mechanicalpropertiesofthefoundationsoilsareobtained,includingarithmeticmean,standarddeviationandotherparametersrefer‘Physicalandmechanicalindex

12页共21页sheet’.φk、Ckunderthefoundationbaseattherangeoffoundationaresuggesteduponthetriaxialsheartestresultsandconstructionexperience,whichvaluesareshownasfollowing:不固结不排水三轴剪切试验φk、Ck建议值unconsolidated-undrainedtriaxialsheartestφk、Cksuggestedvalue土层编号土层名称Layerφm(°)Cm(kPa)φk(°)Ck(kPa)②层粉土silt17.612.2(13.2)(9.2)③层粉质粘土siltyclay11.529.710.626.8③1层粘土clay9.531.69.029.1④层粉细砂Finesiltysand(30.0)(0)(30.0)(0)⑤层粉质粘土siltyclay12.730.39.725.7注:括号内数值为经验数值Note:thedatainbracketisexperiencedata此次勘察压缩试验,按建筑物的荷载情况及土层的不同深度进行不同压力段的压缩试验,并绘制e~p曲线,计算每层土的自重应力至自重应力加附加应力段的压缩模量,其ES值见下表:Thesoilcompressiontestaccordingto地基土分段压缩模量成果表ES(MPa)SubsectionmodulusofcompressibilityoffoundationsoilEslist土层编号土层名称LayerEs1-2其它压力段othersubsections②层粉土silt11.6Es1-3=12.77

13页共21页③层粉质粘土siltyclay4.11Es1-3=4.65③1层粘土clay3.62Es1-3=4.32④层粉细砂Finesiltysand(18.0)⑤层粉质粘土siltyclay4.90Es1-3=6.00Es2-3=7.72Es2-4=8.35⑥层粉土夹粉砂Silt+siltysand14.6Es2-3=20.02Es2-4=20.39⑦层粉质粘土Siltyclay5.49Es2-3=9.47Es2-4=10.31⑦1层粉土silty10.6Es2-3=16.44Es2-4=17.73⑧层粉砂夹粉土Siltysand+silt(20.0)注:括号内数值为经验数值Note:thedatainbracketisexperiencedatafak建议值依据静力触探曲线,用标准贯入试验和钻探取样试验资料并结合邻近工程经验综合确定。fakvalueareobtainedbasingontheCPTcurve,thetestresultsoftheSPTandboringholesample,andtheconstructionexperienceofadjacentprojects.各土层fak一览表(kPa)fakListofsoillayers地层编号地层名称fak建议值(kPa)②粉土silt110③粉质粘土siltyclay110③1粘土clay90④粉细砂160

14页共21页Finesiltysand⑤粉质粘土siltyclay120⑥粉土夹粉砂Silt+siltysand150⑦粉质粘土Siltyclay130⑦1粉土silty140⑧粉砂夹粉土Siltysand+silt180四、地下水概况场区浅层地下水属第四系松散层孔隙潜水,勘察期间实测稳定水位埋深5.4m~6.3m,高程-6.21m~-4.97m,水位受季节、降水等因素影响会有所升降。该场地自然水位年变幅约2.0m,近期年最高水位埋深按3.0m考虑。ShallowgroundwateroftheplannedconstructionsiteistheporephreaticwateroftheQuaternaryperiod.Thereadingofstaticwaterlevelis5.4m-6.3m,thewaterelevationisEL-6.21m—4.97m.Phreaticwaterlevelvarieswithfactorssuchasseasonandclimatechange.Theannualvariationrangeofnaturalgroundwaterlevelisabout2.0m.Maxdepthtogroundwaterlevelcantake3.0mrecently.本次勘察在场地内采集一组水样和一组土样,并结合场地东侧梅花生物科技集团已有《水、土质分析报告》,进行腐蚀性分析,依据《岩土工程勘察规范》GB50021-2001(2009年修订条款)第12.2.1

15页共21页条和第12.2.4条判定,环境类型为Ⅱ类,地下水对混凝土结构有微腐蚀性,在干湿交替环境下,对钢筋混凝土结构中的钢筋有弱腐蚀性;地基土对混凝土结构有微腐蚀性,对钢筋混凝土结构中的钢筋有微腐蚀性。水、土对建筑材料腐蚀的防护,应符合国家标准《工业建筑防腐蚀设计规范》GB50046-2008的规定。Wetestagroupsampleofwaterandsoilwhicharecollectedattheplannedsiteandrefer‘water,soilanalysisreport’ofPlumBiotechnicalGroup,easterntothesitetoanalyzethecorrosionstatus.AccordingtoCodeforGeotechnicalEngineeringInvestigationGB50021-2001Edition(2009revised),No.12.2.1and12.2.4,wecanconcludethat,theenvironmenttypeisII.Thegroundwaterofthesiteismildlycorrosivetoconcretestructure,groundwaterismildlycorrosivetorebarinRCstructureunderlong-termsubmersion,andweaklycorrosivetorebarinRCstructureunderalternatingdryandwetconditions.Anti-corrosionmeasureoftheconstructionmaterialshouldmeetrequirementsoftheCodeforanticorrosionondesignofindustrialconstruction,GB50046-2008.第三章场地土地震效应Seismiceffectsofthesitefoundation一、抗震设防烈度及液化判别依据《建筑抗震设计规范》(GB50011-2010)和《中国地震动参数区划图》(GB18306-2001)标定,拟建场地抗震设防烈度为8

16页共21页度,设计基本地震加速度值为0.20g,设计地震分组为第二组。AccordingtoCodeforBuildingSeismicDesign(GB50011-2010),andSeismicgroundmotionparameterzonationmapofChinaGB18306-2001,seismicfortificationintensityofthesiteis8degree;thedesignvalueofbasicearthquakeaccelerationis0.20g.ThedesignearthquakegroupingisGroup2.依据《建筑抗震设计规范》(GB50011-2010)第4.3.3条~第4.3.5条,②层粉土位于水位以上,初判为不液化;用标准贯入试验法对场地内的④层粉细砂和⑥层粉土夹粉砂进行液化判别,结论为不液化,该场地无地震液化土层,详见“地基土地震液化标贯法判别表”。AccordingtoCodeforBuildingSeismicDesign(GB50011-2010)no.4.3.3-4.3.5,②layersiltlayerisabovethegroundwaterlevel,whichispreliminarilyidentifiedasnon-liquefiablestratum.④layerfinesiltysandand⑥layersilt+siltysandareconcludedasnon-liquefiablestratumbasedontheresultsofSPT,CPT.Hence,theplannedsiteisconcludedasnon-liquefiablestratum.Detailedinformationrefto‘liquefactionassessmentsheetbySPT’.二、场地类别Thetypeofthesite依据《建筑抗震设计规范》(GB50011-2010)第4.1.3条~第4.1.5条,本场地揭露天然地层(20m以内)土的类型均属中软土。估计并计算土层等效剪切波速(Vse)为170.0m/s。查阅该场地区域地质资料可知:场地覆盖层厚度大于50m,该场地类别为Ⅲ类,特征周期为0.45s。AccordingtoCodeforBuildingSeismicDesign(GB50011-2001)No.4.1.3-4.1.5,thetypeofnaturalsoilstratum(within20m)isclassifiedasmediumsoftsoil.Equivalentshearwavevelocityiscalculatedforsoil

17页共21页strataas170.0m/s.Accordingtoregionalgeologicdata,thicknessoftheoverburdenlayerisabove50m.ThereforethesiteshallbeclassifiedasTypeIII,theeigenperiodis0.45s.依据《建筑抗震设计规范》(GB50011-2010)第4.1.1条,该场地为建筑抗震一般地段。AccordingtoCodeforBuildingSeismicDesign(GB50011-2001)No.4.1.1,Thesiteisgeneralforbuildingearthquakedefense.三、场地标准冻结深度Standardfrozendepthonsite查中国季节性冻土标准冻深线图,该场地的标准冻结深度为0.7m。Thestandardfrozendepthis0.7maccordingtoChina’sseasonalfrozensoilfrostdepthcurve.第四章结论与建议Conclusionandsuggestion1、该场地天然土层分布较稳定,土质较均匀,勘察中未发现崩塌滑坡等不良地质作用,为较适宜进行工程建设的场地;1,Ontheplannedsite,thedistributionofmajorsoilstrataisstableanduniform.NoCollapseofthephenomenonduringtheinvestigation.Thesiteisrelativelystable,andsuitableforbuildingerection.2、依据国家标准《建筑抗震设计规范》(GB50011-2010)和《中国地震动参数区划图》(GB18306-2001)标定,拟建场地抗震设防烈度为8度,设计基本地震加速度值为0.20g,设计地震分组

18页共21页为第二组。场地无地震液化土层;2.AccordingtoCodeforSeismicDesignofBuildingsGB50011-2010andSeismicgroundmotionparameterzonationmapofChinaGB18306-2001,theSeismicfortificationintensityofthesiteis8degree;thedesignvalueofbasicearthquakeaccelerationis0.20g.ThedesignearthquakegroupingisGroup2.Thesiteisnotsubjecttosandliquefaction.3、拟建厂房生产车间,建议采用天然地基,独立柱基础,基础埋深约1.5m,天然地基持力层为②层粉土,③1层粘土较软弱,层底有所起伏,建议适当加强基础和上部结构的整体强度和刚度。3.Forproposedproductionhall(PH),naturalfoundationandindependentfoundationaresuggestedwithStratum②siltasitsloadsustaininglayerwiththedepthabout1.5m.WeadvisethatproperlystrengthenthestrengthandrigidityofthesuperstructureiftheirfoundationonStratum③1claywithlowloadcapacityandupanddownthebottom.4、拟建厂房局部地下室埋深约5.0m,基底持力层为③层粉质粘土,基坑开挖可采用自然放坡方案,坡的高宽比应通过边坡稳定性计算并结合工程经验确定。边坡土层参数见“物理力学指标统计表”。该部位基础施工应注意先后顺序,建议采取先深后浅的顺序。4.ForproposedbasementofPH,thedepthwillbeaboutEL-5.000m,andthebaseonStratum③siltyclay.Thenaturalslopeexcavationcanbeadoptedwiththesuitabledepth-widthratiowhichcanbedecidedbythecalculationoftheslopestabilityandconstructionexperience.Theparametersofslopecanrefer‘Physicalandmechanicalindexsheet’.Pay

19页共21页attentiontothesequenceoffoundationconstruction,onwhichdeepfirst,thenshallowfollowissuggested.5、拟建厂房高货架部位,基底压力约200kPa,经初步估算,天然地基不能满足荷载要求,建议选用CFG桩复合地基,桩端持力层可选择④层粉细砂及以下地层。地基处理后,应按相关规范进行检测达到设计要求后方可进行下步施工。其桩基设计参数见下表(CFG桩参数参照干作业钻孔桩):5.Forproposedhighrackstoragewiththefoundationstressabout200kpa,thenaturalloadcapacityofsoilcannotmeettherequirement,sowesuggestCFPpilefoundationwithloadbearingonStratum④finesiltysandordeeperStratum.Thesoilcapacityshouldbetestedtomeetthedesignrequirementafterthesoiltreatment,andthencontinuethenextconstructionwork.Theparameterofpilefoundationcanrefertothefollowingsheet:桩的极限侧阻力标准值qsik(kPa)和极限端阻力标准值qpk(kPa)Thestandardvaluesofultimateresistantstressonthesideqsikandbottomqpkofpiles土层编号土层名称土的状态泥浆护壁钻孔桩(kPa)干作业钻孔桩(kPa)eILqsikqpkqsikqpk②层粉土0.8453030③1层粘土0.843030③层粉质粘土0.544545④层粉细砂中密~密实4660046800⑤层粉质粘土0.456260060900⑥层粉土夹粉砂0.710621000621200

20页共21页⑦层粉质粘土0.396610006412006、场地地下水位埋深5.4m~6.3m,高程-6.21m~-4.97m,现阶段基础施工可不采取降水措施;6.Forthedepthofsitegroundwateris5.4m-6.3m,anditelevationis-6.21m~-4.97m,dewatermeasuresisnotnecessarilyadoptedonthecurrentfoundationconstruction.7、场区地下水对混凝土结构有微腐蚀性,在干湿交替环境下,对钢筋混凝土结构中的钢筋有弱腐蚀性;地基土对混凝土结构有微腐蚀性,对钢筋混凝土结构中的钢筋有微腐蚀性。水、土对建筑材料腐蚀的防护,应符合国家标准《工业建筑防腐蚀设计规范》GB50045-2008的规定;7.Thegroundwaterofthesiteismildlycorrosivetoconcretestructure,groundwaterismildlycorrosivetorebarinRCstructureunderlong-termsubmersion,andweaklycorrosivetorebarinRCstructureunderalternatingdryandwetconditions.Anti-corrosionmeasureoftheconstructionmaterialshouldmeetrequirementsoftheCodeforanticorrosionondesignofindustrialconstruction,GB50046-2008.8、该场地标准冻结深度为0.7m;8.Thestandardfrozendepthofsoilis0.7monthesite9、依据《建筑工程抗震设防分类标准》(GB50223-2008),拟建工程抗震设防类别为标准设防类;9.AccordingtoStandardforClassificationofSeismicProtectionofBuildingConstructionsGB50223-2008,theproposedprojectis

21页共21页classifiedasstandardseismicprotectiontype.10、天然地基开槽后,应进行普遍钎探和详细验槽工作,如发现土质异常,应会同各部门协商处理解决;10.GeneralDrillingoutanddetailedpitinspectionshouldbefulfilledafterthepitexcavation.Ifanyquestionappearsduringtheexcavationperiod,coordinationanddiscussionwithrelateddepartmentshouldbenecessary.11、以上结论和建议只适用于本报告中所列拟建物及场地,如有变动,须另作考虑。11.Theaboveconclusionandsuggestionareonlyappliedtotheproposedsiteandbuildings.编写:复核:审核:

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