低层建筑脚手架施工方案

低层建筑脚手架施工方案
仅供个人学习
反馈
文件类型:.zip解压后doc
资源大小:1.27M
标准类别:施工组织设计
资源属性:
下载资源

施工组织设计下载简介

内容预览随机截取了部分,仅供参考,下载文档齐全完整

低层建筑脚手架施工方案

R<6.40kN,thedesigncalculationofsinglefastenerskidresistancecapabilitymeettherequirement.

10.5脚手架荷载标准值:

昆山某钻孔灌注桩工程施工组织设计-secret10.5Standardvalueofscaffoldload:

作用于脚手架的荷载包括静荷载、活荷载和风荷载。静荷载标准值包括以下内容:

Thestandardvalueofthescaffoldloadincludesstaticload,liveloadandwindload.Thecharacteristicvalueofstaticloadincludesthefollowingcontents:

每米立杆承受的结构自重标准值(kN/m);本例为0.1248

Theselfweightstandardvalueofthepilepermeter(kN/m);inthisprojectis0.1248

NG1=0.125×10.500=1.310kN;

脚手板的自重标准值(kN/m2);本例采用木脚手板,标准值为0.35

Theselfweightstandardvalueofthescaffold(kN/m2);thisprojecttakeswoodenscaffold,thestandardvalueis0.35

NG2=0.350×3×1.500×(1.050+0.3)/2=1.063kN;

栏杆与挡脚手板自重标准值(kN/m);本例采用栏杆木,标准值为0.14。

Standard dead weight of railing and scaffolding baffle (KN/m);railing wood is adopted in this project and its standard value is 0.14.

NG3=0.140×3×1.500/2=0.315kN;

吊挂的安全设施荷载(kN/m2);0.005

NG4=0.005×1.500×10.500=0.079kN;

经计算得到,静荷载标准值

Aftercalculating,thestaticloadstandardvalue:

NG=NG1+NG2+NG3+NG4=2.767kN;

活荷载为施工荷载标准值产生的轴向力总和,内、外立杆按一纵距内施工荷载总和的1/2取值。

Theliveloadisthetotalamountoftheaxialforcewhichisgeneratedbytheconstructionloadstandardvalue,theinternalandexternalpilestake1/2ofthetotalamount.

经计算得到,活荷载标准值

Aftercalculating,theliveloadstandardvalue:

NQ=2.000×1.050×1.500×2/2=3.150kN;

风荷载标准值应按照以下公式计算

Thestandardvalueofthewindloadshouldbecalculatedasthefollowingformula:

Wo=0.350kN/m2;

经计算得到,风荷载标准值

Aftercalculating,thewindloadstandardvalue:

Wk=0.7×0.350×0.615×1.200=0.181kN/m2;

不考虑风荷载时,立杆的轴向压力设计值计算公式

N=1.2NG+1.4NQ=1.2×2.767+1.4×3.150=7.731kN;

考虑风荷载时,立杆的轴向压力设计值计算公式

N=1.2NG+0.85×1.4NQ=1.2×2.767+0.85×1.4×3.150=7.069kN;

风荷载设计值产生的立杆段弯矩MW计算公式

Theformulaoftheuprightstanchionbendingsectionthatgeneratedbythewindloaddesignedvalueis:

Mw=0.85×1.4WkLah2/10=0.850×1.4×0.181×1.500×1.8002/10=0.105kN.m;

10.6立杆的稳定性计算:

10.6Thecalculationoftheuprightstanchionstability:

不组合风荷载时,立杆的稳定性计算公式为:

Whenthewindloadisnotconsidered,theformulaoftheuprightstanchionstabilityis:

立杆的轴心压力设计值:N=7.731kN;

计算立杆的截面回转半径:i=1.58cm;

Thecalculationofthesectionalradiusofgyrationoftheuprightstanchion:i=1.58cm;

计算长度附加系数:K=1.155;

Thecalculationofthelengthadditionalfactor:K=1.155;

计算长度系数参照《扣件式规范》表5.3.3得:U=1.500

Thecalculationofthelength,seeFastenerspecifications,table5.3.3,U=1.500

计算长度,由公式lo=kuh=kuh确定:lo=3.119m;

Thecalculationofthelengthislo=3.119m;basedontheformulalo=kuh

Lo/i=197.000;

轴心受压立杆的稳定系数φ,由长细比lo/i的结果查表得到:φ=0.186;

立杆净截面面积:A=4.89cm2;

立杆净截面模量(抵抗矩):W=5.08cm3;

钢管立杆抗压强度设计值:[f]=205.000N/mm2;

σ=7731.000/(0.186×489.000)=84.996N/mm2;

立杆稳定性计算σ=84.996小于[f]=205.000N/mm2满足要求!

Thecalculationoftheuprightstanchionstabilityσ=84.996,lessthan [f]=205.000N/mm2cansatisfytherequirements.

考虑风荷载时,立杆的稳定性计算公式

Whenthewindloadisconsidered,theformulaoftheuprightstanchionstabilityis:

立杆的轴心压力设计值:N=7.069kN;

计算立杆的截面回转半径:i=1.58cm;

Thecalculationofthesectionalradiusofgyrationoftheuprightstanchion:i=1.58cm;

计算长度附加系数:K=1.155;

Thecalculationofthelengthadditionalfactor:K=1.155;

计算长度系数参照《扣件式规范》表5.3.3得:U=1.500

Thecalculationofthelength,seeFastenerspecifications,table5.3.3,U=1.500

计算长度,由公式lo=kuh确定:lo=3.119m;

Thecalculationofthelengthislo=3.119m;basedontheformulalo=KUh

lo/i=197.000;

轴心受压立杆的稳定系数φ,由长细比lo/i的结果查表得到:φ=0.186

立杆净截面面积:A=4.89cm2;

立杆净截面模量(抵抗矩):W=5.08cm3;

钢管立杆抗压强度设计值:[f]=205.000N/mm2;

σ=7069.230/(0.186×489.000)+104569.655/5080.000=98.308N/mm2;

立杆稳定性计算σ=98.308小于[f]=205.000N/mm2满足要求!

Thecalculationoftheuprightstanchionstabilityσ=98.308,lessthan [f]=205.000N/mm2cansatisfytherequirements.

10.7最大搭设高度的计算:

10.7Thecalculationofthemaximumsetupheight:

不考虑风荷载时,采用单立管的敞开式、全封闭和半封闭的脚手架可搭设高度按照下式计算:

构配件自重标准值产生的轴向力NG2K(kN)计算公式为:

NG2K=NG2+NG3+NG4=1.457kN;

活荷载标准值:NQ=3.150kN;

Thestandardvalueoftheliveload:NQ=3.150kN;

每米立杆承受的结构自重标准值:Gk=0.125kN/m;

Theselfweightstandardvalueoftheuprightstanchionpermeter:Gk=0.125kN/m;

脚手架搭设高度Hs等于或大于26米,按照下式调整且不超过50米:

ThesetupheightofthescaffoldHsisequalorhigherthan26m,theadjustmentshouldnotbegreaterthan50m:

[H]=83.382/(1+0.001×83.382)=76.965m;

[H]=76.965和50比较取较小值。得到,脚手架搭设高度限值[H]=50.000m。

Takethelowervaluebetweenthe[H]=76.965and50,thengetthesetupheightofthescaffold[H]=50.000m.

考虑风荷载时,采用单立管的敞开式、全封闭和半封闭的脚手架可搭设高度按照下式计算:

构配件自重标准值产生的轴向力NG2K(kN)计算公式为:

NG2K=NG2+NG3+NG4=1.457kN;

活荷载标准值:NQ=3.150kN;

NQ–Thestandardvalueoftheliveload:NQ=3.150kN;

每米立杆承受的结构自重标准值:Gk=0.125kN/m;

计算立杆段由风荷载标准值产生的弯矩:Mwk=Mw/(1.4×0.85)=0.105/(1.4×0.85)=0.088kN.m;

Mwk–thecalculationoftheuprightstanchionbendingsectionthatgeneratedbythewindloaddesignedvalue:MMwk=Mw/(1.4×0.85)=0.105/(1.4×0.85)=0.088kN.m;

脚手架搭设高度Hs等于或大于26米,按照下式调整且不超过50米:

ThesetupheightofthescaffoldHsisequalorhigherthan26m,theadjustmentshouldnotbegreaterthan50m:

[H]=75.298/(1+0.001×75.298)=70.025;

[H]=70.025和50比较取较小值。经计算得到,脚手架搭设高度限值[H]=50.00m。

Takethelowervaluebetweenthe[H]=70.025and50,thengetthesetupheightofthescaffold[H]=50.00m.

10.8连墙件的计算:

10.8Thecalculationofthewallpieces:

连墙件的轴向力计算值应按照下式计算:

风荷载基本风压值Wk=0.181kN/m2;

ThefundamentalwindpressurevalueofthewindloadWk=0.181kN/m2;

每个连墙件的覆盖面积内脚手架外侧的迎风面积Aw=16.200m2;

ThewindwardareaoftheexternalsideofscaffoldineverywallpieceAw=16.200m2;

连墙件约束脚手架平面外变形所产生的轴向力(kN),No=5.000kN;

风荷载产生的连墙件轴向力设计值(kN),应按照下式计算:

NLw=1.4×Wk×Aw=4.101kN;

连墙件的轴向力计算值NL=NLw+No=9.101kN;

由长细比l/i=300.000/15.800的结果查表得到0.949;

Gettheresultof0.949basedontheratioofslendernessl/i=300.000/15.900

A=4.89cm2;[f]=205.00N/mm2;

Nl=9.101

Nl=9.101

连墙件采用双扣件与墙体连接。

Thewallpiecestakethedoublefastenertoconnectwiththewallbody.

经过计算得到Nl=9.101小于双扣件的抗滑力16.0kN,满足要求!

Aftercalculating,Nl=9.101islessthantheskidresistance16.0kNofthedoublefasteners,itsatisfiestherequirements.

10.9立杆的地基承载力计算:

10.9Thecalculationofthegroundbearingcapacityoftheuprightstanchion:

立杆基础底面的平均压力应满足下式的要求

Theaveragepressureofthefoundationbedoftheuprightstanchionshouldsatisfythefollowingformula:

Thegroundbearingcapacitydesignedvalueis:

fg=fgk×Kc=110.000kN/m2;

其中,地基承载力标准值:fgk=220.000kN/m2;

Thestandardvalueofthegroundbearingcapacityis:fgk=220.000kN/m2;

脚手架地基承载力调整系数:kc=0.500;

Thevariationvalueofthegroundbearingcapacityofthescaffoldis:kc=0.500;

立杆基础底面的平均压力,p=N/A=78.547kN/m2;

Theaveragepressureofthefundamentalgroundingoftheuprightstanchion,p=N/A=78.547kN/m2;

其中,上部结构传至基础顶面的轴向力设计值:N=7.069kN;

基础底面面积(m2):A=0.090m2。

Thefundamentalgroundingarea (m2):A=0.090m2.

p=78.547≤fg=110.000kN/m2。

地基承载力的计算满足要求!

Thecalculationofthegroundbearingcapacitysatisfiestherequirements.

11附图(平面、立面)

11AttachedFigures(plane&elevation)

12QualityControl

13ConstructionProcess

14EmergencyManagement

应急小组:EmergencyGroup

组长/Leader:陈肯/ChenKen

副组长/ViceLeader:陈兴明/ChenXingMing

成员/Members:杜小均/DuXiaoJun张成林/ZhangChengLin忠诚/ZhongCheng

周永川/ZhouYongChuan

EmergencyGroupLeader

13608363637

ChenXingMing

13527542237

13399872611

ZhangChengLin

GB/T 40134-2021 航天系统电磁兼容性要求.pdf18281835139

ZhouYongChuan

15823874958

EmergencyServices

SY/T 4212-2017标准下载Nanbahospital

XIABahospital

NanbaSafetyControllingCenter

©版权声明
相关文章