初步设计说明.docx

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1、初步设计说明初步设计说明建设单位：播州区卫生和计划生育局委托单位：申都设计集团有限公司勘察单位：贵州省地矿局第二工程勘察院勘察资质：工程勘察综合类甲级(B152004752)项目负责：邓军技术负责：李海潮报告编写：李海潮邹子龙曾晓林审核：苟天红审定：张洪明吴剑辉总工程师：田维强院长：张林第一章、项目概况4第一节、任务由来4第二节、边坡设防位置的确定4第二章、支护方案设计4第一节、整体设计思路4第三章、施工注意事项9第一节、排桩施工注意事项9第二节、桩间板施工注意事项10第三节、其他注意事项10第四章、预计工作量11第一章、项目概况第一节、任务由来本设计说明是结合建设方对本项目的要求，由于“工期

2、紧，任务重”，故而编写此初步设计说明。第二节、边坡设防位置的确定结合建设方、总设计承包单位、及施工方的意见，并多次开会讨论最终确定的本次基坑设防位置。设防基坑坡脚线由剪力墙内侧边线向基坑外侧扩展L9m（0.4m厚的剪力墙+L5m的施工空间），以此线作为本次设防边线。第二章、支护方案设计第一节、整体设计思路根据勘察结果，并结合建设方意见和场地周边条件，场地地下水位浅，基坑边坡外侧有大量重要建（构）筑物，故综合确定本次设计采用“排桩+桩顶冠梁+桩间板”的整体设防思路进行。第二节、注意事项本设计考虑到场地条件，设计时考虑了40KPa的基坑周边材料堆载，但必须注意下列事项：1、排桩顶部l.5m范围内，

3、严禁堆载。2、严禁堆载超过设计堆载值（40KPa）o3、第3段根据施工方现场确认不作堆载场地，故第3段设计时未考虑堆载，即第3段不得在基坑边坡后部堆载。第三节、支护方案设计本设计共采用225根排桩，桩芯距多为3.0m,桩长16.5m21.0m,共采用10类排桩进行支护，支护宽度655.5m。其详细设计参数见下表：表2-1排桩设计参数一览表分段计算剖面排桩尺寸参数(D=L3m)排桩配筋参数桩类别桩芯距(m)悬臂段(m)嵌固端(m)桩总长(m)纵筋箍筋加强筋第1段33.010.59.52026E32E12100E20(3)2000I第2段53.010.510.52127E32E12120E2020

4、00II第3段83.010.510.52127E32E12120E202000103.010.56.016.5I2E32E12200E202000III第4段113.010.56.016.512E32E12200E202000第5段133.010.56.016.512E32EI2200E202000第6段153.010.56.016.512E32E12200E202000第7段173.010.510.52112E32E12200E202000IV193.010.56.016.518E32E12150E202000V第8段213.010.56.016.518E32EI2150E202000233

5、.010.56.016.523E32E14100E202000VI第9段263.010.56.016.521E32E12100E20(3)2000Vn293.010.56.016.512E32E12(3)200E202000III第10段323.010.56.016.515E32E12200E20(3)2000VIiI333.010.510.020.520E32E12150E202000IX第11段353.010.56.016.5I2E32E12200E202000III373.010.56.016.512E32E12200E202000393.010.56.016.5I5E32E12200E

6、202000VnI393.510.56.016.517E32EI2200E202000X注:E表示HRB400回.螺纹钢筋。其中冠梁采用1.30.8m尺寸，位于排桩顶部。桩间板厚0.3m,支护高度9.7m。表22桩间板及冠梁设计参数一览表冠梁参数桩间板参数(按每米单块板计)尺寸(m)配筋板厚(m)主筋箍筋Asl5E161.30.8As22E160.310E20E12200As3E12200注：E表示HRB400型螺纹钢筋。第四节、桩芯坐标表2-31类桩桩芯坐标桩编号XY桩编号XY桩编号XYI13047120.497384329.118193047099.706384317.133I173047

7、082.558384300.556I23047117.891384327.632I103047097.228384315.441I183047080.902384298.055133047115.286384326.143IIl3047094.836384313.632I193047079.370384295.476143047112.681384324.655I123047092.534384311.709I203047077.964384292.826153047110.076384323.167I133047090.327384309.677I213047076.687384290.11

8、2163047107.472384321.679I143047088.221384307.541I223047075.544384287.338173047104.867384320.191I153047086.221384305.305I233047074.536384284.513183047102.262384318.703I163047084.332384302.9751243047073.666384281.642表242类桩桩芯坐标桩编号XY桩编号XY桩编号XYIIl3047072.005384279.144H123047052.017384261.70611233047062.5

9、17384237.275II23047069.496384277.71111133047053.314384259.43611243047065.123384238.7631133047066.987384276.278II143047054.611384257.166II253047066.611384236.1581143047064.478384274.84511153047055.907384254.895II263047068.099384233.553II53047061.969384273.412II163047057.204384252.62511273047069.58738

10、4230.948II63047059.460384271.97811173047058.501384250.35511283047071.075384228.3431173047056.951384270.54511183047055.896384248.86711293047072.563384225.738II83047054.442384269.11211193047057.220384246.54911303047074.051384223.134II93047051.933384267.67911203047058.544384244.23011313047075.539384220

11、.529IIlO3047049.424384266.24611213047059.869384241.912IIll3047050.721384263.97611223047061.193384239.594表2-53类桩桩芯坐标桩编号XY桩编号XY桩编号XYIIIl3047076.992384217.984III253047123.756384201.257III493047221.845384269.035III23047078.445384215.440III263047126.218384202.664III503047220.407384271.553III33047079.8983

12、84212.896III273047128.681384204.071III513047218.968384274.071III43047081.352384210.352III283047131.144384205.478III523047217.530384276.589III53047082.805384207.808III293047133.607384206.8841II533047168.904384248.813III63047085.388384209.284I1I303047136.070384208.291I11543047167.502384251.26711173047087.971384210.759IH313047138.533384209.698II1553047166.1(X)384253.722III83047090.555384212.235III323047140.996384211.1051II563047164.698384256.17611193047093.138384213.710III333047143.459384212.512II1573047163.296384258.631IlllO3047095.721384215.