毕业论文-文华苑住宅小区地基处理设计

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1、摘要昆明文华苑住宅小区2号楼位于西山区政府办公楼西侧。场地愿为耕地鱼塘，多位中高压缩性深厚软土，其有机质含量较高、天然地基承载力较低，含水量较大。场地后期经人工堆填，地势较为平坦，地貌上处于昆明湖积盆地中西部，拟建住宅楼为7层框架结构，占地面积54.6×23.5㎡，拟建物对差异沉降敏感，建筑物安全等级为二级。结合技术可行性、处理可靠性、经济合理性这三个方面加以考虑，决定采用深层搅拌桩粉体喷射法进行地基处理。经过一系列的设计计算，采用深层搅拌桩直径为500㎜，有效桩长9.0m，单桩承载力设计值为118kN，共打深层搅拌桩12

2、38根，工期为24天，工程总造价为969744.7元。AbstractNo.2buildingofKunMingWenHuayuanuptownislocatedinthewestoftheofficebuildingofXiShandistrictgovernment.Thebuildingsitewasplantationandpoundinthepast,andwasfilledbyhandlater.Thesubsoilismainlydeepthicksoftsoilwhichhasahighcompressib

3、ility,andcontainsalotoforganism.Thebearingcapacityofthenaturalsubsoilislowwhilethemoisturecontentisgreat.Thephysiognomyofthefieldisflat,andwhenitreferstorelief,itislandedonthemidwestofKunMinglakebasin.Theresidentialbuildingtobuildisaseven-storiedbuildingandhasafra

4、medstructure.Thebuildingareais54.6by23.5squaremeters.Accordingtothedesignrequests,thebuildingplannedtobuildissensitivetothedifferentialsettlement,andtheconstructionsafetyclassissecond-degree.Aftertheanalysisandcontrastonthefeasibilityofthetechnique,thereliabilityo

5、fthetreatmentandthereasonablenessoftheeconomy,powder-deep-mixingmethodwasdecidedtobeusedtoreinforcethesubsoil.Throughaseriesofcalculation,thediameterofthedeepmixingpileusedisdecidedtobe500mm,theavailablelengthofthepileis9meters,thebearingcapacityofasinglepileisdes

6、ignedtobe118kN,andthereare1238pilesusedinall.Theconstructionperiodiscalculatedtobe24daysandtheconstructioncostis￥969744.70.目录第一部分工程设计1工程概况…………………………………………………………………………………11.1上部结构及载荷情况………………………………………………………………11.2工程地质概况……………………………………………………………………11.3水文地质条件………………………………

7、……………………………………22.工程方案论证及选择………………………………………………………………22.1初步选择施工方案………………………………………………………………22.2施工方案论证……………………………………………………………………22.3最优方案的选择…………………………………………………………………123工程设计计算………………………………………………………………………173.1深搅桩主要技术参数设计………………………………………………………173.2单桩竖向承载力标准值的设计计算…………………………………

8、…………173.3面积置换率………………………………………………………………………183.4桩数………………………………………………………………………………183.5下卧层强度验算…………………………………………………………………183.6沉降变形计算……………………………………………………………………