施工组织设计下载简介
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驷马河特大桥主桥悬臂现浇施工方案将底板砼工字钢及底钢模板折算为9m,腹板转化为集中荷载,作用在边跨跨中,按三跨相等连续梁简化计算。
1、q砼=0.6725×7×2.5/2/9×26=17KN.m
q模=0.8×7×2.5/2/9=0.778KN.m
qI25=381×6×14/2/9=2.287KN.m
虹桥科技安装施工组织设计q活载=7×2.5×2.5/2/9=2.431KN.m
q合=q砼+q模+qI25+q活载=22.476KN.m
P=(4.985—0.6725)×2.5×0.8×26/2=112.125KN
M边跨中=0.08×ql2Ra=0.4×ql
M中跨中=0.025×ql2Rb=1.1×ql
M边跨中=0.0.213×qlRa=0.425×p
M中跨中=-0.075×qlRb=0.575×p
M中支座=-0.075×qlRc=0.575×p
Mmax=0.08×ql2+0.213pl
=0.08×22.476×32+0.213×112.125×3
=87.831KN.m
选用I25×2安全系数1.5
则:σ=1.5Mmax/402/2=163.86Mpa<215Mpa
RA=RD=0.425P+0.4ql=74.6KN
RC=RD=1.1ql+0.575p=138.6KN
P1砼=(0.7×0.8+0.39×1+0.28×1.8+0.365×100+0.675×0.8)×26×2.5/4
=2.359×26×2.5
=153.335KN/4
P2砼=(0.325×2.45+0.675×0.8)×26×2.5
=1.336×26×2.5/4
P1模=[5.4×3.8+(4.985-0.9-0.75)×2×3.8]×0.8KN/2
=45.866×0.8/2
P2模=(4.985×3.8+3.25×3.8)×0.8/4=6.26KN
P2活=3.25×3.8×2.5/4=7.72KN
P1=P1砼+P1模=47.48
P2=P2砼+P2模+P2活=35.69=P3
M支=2.9×35.69+74.6×1.4+0.9×35.69=240.062KN.m
M中=47.48×1+138.6×1.5+35.69×4+74.6×4.5+6×35.69
-332.06×3.1
Mmax=M支=240.062
安全系数为1.5材料为I40双拼
σ=240.062×1.5/1090/2=165.18<215Mpa
q1=(0.325×2.45+0.675×0.8)
×2.6×3.5/2/4.3
q模=6.26×4/2/4.34.3
q活=3.25/2×2.5
q合=q1+q模+q活
=1.360+2.912+4.063
M=ql2/8=8.335×4.32/8=19.264KN.m
选用I20双拼安全系数为1.5
σ=19.264×1.5/178/2
=81.17Mpa<215Mpa
最不利荷载为承受底板的重量
q=0.381×6×14/2/7+4.3×7×0.8/2/7
=4006=4.01KN
Mmax=14.035×7-3.5×3.5/2×q
选用I28双拼安全系数为1.5
σ=73.680×1.5/508/2
=108.77<215Mpa
P=8.335×4.3/2
Mmax=0.9×17.9+2.9×17.9+3.9×14.05
=122.815KN.m
选用I28双拼安全系数为1.5
σ=122.815×1.5/508/2
=181.32Mpa<215Mpa
1、由第五项至第九项计算知吊杆的最大受力为138.6KN
568/138.6=4.1>2.0满足要求
JLΦ32:长度为4.985+(0.1+0.25+0.25+0.1)+(0.25+0.56+0.40+0.1)=7m
=138.6×103×7/(195×109×3.14×0.0162)
十一、三角挂蓝受力分析
1、根据第六项计算知前上横梁的荷载总和为:
P=74.6×2+138.6×2+35.69×4+47.48×2
同时,第六项计算时未考虑上下横梁及精轧螺纹重量,此几项合计重量为40KN,
则P总=664.12+40KN
则单片三角挂蓝前支点受力为P总/2=352KN
4.3×352=3.8×P斜×4/5.5
P斜=547.7KN352KN
P压=405.7×2O
=811.4KN13.8
强度验算安全系数为1.5
斜杆σ=547.7×1.5/(0.25×0.025)
=131.44Mpa<215Mpa
=90.83Mpa<215Mpa
λ=400/(2.62×2)
=19.62Mpa<215Mpa
钢销直径为Φ100mm
最不利为压杆与斜杆交接处钢销
=117.45Mpa<125Mpa
450×2/547=3.3满足要求。
0#、1#块支架支撑采用螺旋管。主墩的两侧各设6根、纵向间距为2.5米、横向间距为3.5米,共设12根529mm壁厚为10mm的螺旋管。见0#、1#块支架示意图。螺旋管顶采用双拼I25,沿桥梁纵轴线设置,两两螺旋钢管相连。双拼I25上铺I40双拼横梁,间距为0.833米,再安装底板平模。大翼板模板的2个支撑退下采用双拼的I25支撑。
大翼板模板q=(5.5+3.25)×5.5×0.8/2
q砼=(0.325×2.45+0.675×0.8)×26×5.5/5.5/2
q活=3.25×2.5×5.5/5.5/2
q=3.5+17.37+4.06
=24.93×5.52/8
选用I25双拼,安全系数为1.5
σ=94.3×109×1.5/402/2
q×5.5/6=22.85KN
Mmax=91.65KN.m
选用I25双拼,安全系数为1.5
σ=91.65×109/402/2
=171Mpa<215Mpa
Mmax=68.85×(0.2+2.24)
=168.00KN.m
选用I40双拼k=1.5
σ=168×109×1.5/1090/2
=115.6Mpa<215Mpa
P=(1204+2.5×2.5×13.5+40×10)/4/3
Mmax=140.7×1.25—140.7×0.833/2
选用I25双拼,k=1.5
σ=117×107×1.5/402/2
=218.8Mpa<215Mpa
P=1204+2.5×2.5×13.5+400+68.85×2+0.676×2×4×12+0.381×2×4×6×2
P= л2×EI/C02
间距为90cm,7根I25,安全系数为1.5
底板砼:q砼=0.9×0.3×26+[(0.7×0.8+0.39×1×2)+0.28×2.4]×26/7
模:q模=0.8×0.9×3
活:q活=2.5×0.9
q合=q砼+q模+q活
=9.99×3.22/8
σ=12.787×109×1.5/402
=100.2Mpa<215Mpa
二、腹板纵梁(单根I25,安全系数为1.5)
q砼=0.5×2.5×26=32.5KN/m
q模=0.8×0.5=0.4KN/m
q活=0.5×2.5=1.25KN/m
q合=q砼+q模+q活=34.15KN/m
Mmax=ql2/8=34.15×3.22/8=43.712
σ=43.712×109×1.5/402
=163Mpa<215Mpa
三、翼缘板下纵梁(单根I25,安全系数为1.5)
q砼=(0.325×2.45+0.675×0.8)×26/2=17.37KN/m
q模=0.8×(3.25+2.5)/2=2.3KN/m
q活=2.5×3.25/2=4.06KN/m
q合=q砼+q模+q活=23.73KN/m
Mmax=ql2/8=30.37KN.m
σ=30.37×1.5/402=113.3Mpa<215Mpa
四、横梁设计I45双拼
梁体荷载:q=0.3×2.6×3×7/7+[(0.7×0.8+0.39×1)×2+0.28×2.4]×26×3/7=52.06KN/m
q活=7×2.5×3/7=7.5KN/m
q模=0.8×7×3/7=2.4KN/m
qI25=9×0.381×3/7=1.47KN/m
q40=0.676×2=1.35KN/m
q合=64.78KN/m
p2=(2.5—0.3)×0.5×3×26=85.8KN
p1=23.73×3/2=35.6KN
Mmax=ql2/8=64.78×3.52/8=99.19KN.m
同时考虑横梁两端悬臂,考虑最不利荷载简图如下:
Mmax=35.6×(0.2+2.24)
取Mmax=99.19KN.m,选用I40双拼k=1.5
JGT503-2016 承插型盘扣式钢管支架构件σ=99.19×109×1.5/1090/2
=45.5Mpa<215Mpa
RB=170.8+71.2=242KN=RD
RC=283.41KN
Φ529cm,t=10mml=12m
Pcr=л2×EI/l02
=л3×2.1×1011×(0.5294—0.5094)/64/(2×12)2
=283.4/(1.5×1.5)
DB13/T 5094-2019 太阳能光伏空气源热泵取暖系统通用技术要求=125Kpa<150Kpa