主线桥梁承台基坑钢板桩支护设计计算书.docx

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1、主线桥梁承台基坑钢板桩支护设计计算书1 .主线桥梁承台基坑支护布置方案根据本工程桥梁承台所处地质环境及施工特点：主线桥梁墩台基本上均位于滩涂及水塘内，其墩位处水位地质情况为九龙江北港河床底标高为-6.5m,潮水位为-1.6m4.5m,承台基底土质主要以淤泥质土为主,最深厚度达到7.2m。主线桥梁所有承台均采用拉森IV型钢板桩作为承台基坑支护，当基坑深度小于5m时不考虑设置钢板桩内支撑，基坑深度在5m-8m之间时将设置两层由136b工字钢作为钢板桩内支撑。承台基坑钢板桩支护范围按照承台四个边各扩大1.5m控制。钢板桩围堰插打时按照高出最高洪水位0.5r进行控制。本工程所采用拉森IV型钢板参数表根

2、据对不同深度的承台基坑支护进行验算，本工程拉森IV型钢板桩选用长度分别为9m、12m、15m、18m,共计4种。本工程钢板桩数量表桥墩承台开挖承台尺寸基坑开挖基坑单根钢板梁号深度(m)(m)尺寸(m)周长钢板桩根名称(m)桩长度(m)数(根)南n大桥左主线桥0#2.6446.4m*18m9.4m*21m60.8091521#1.4096.5m*6.5m9.5m*9.5m38.009952#6.7696.5m*6.5m9.5m*9.5m38.0018953#3.7406.5m*6.5m9.5m*9.5m38.0012954#2.6956.5m*6.5m9.5m*9.5m38.009955#7.7

3、346.5m*6.5m9.5m*9.5m38.0018956#5.8486.5m*6.5m9.5m*9.5m38.0015957#3.1916.5m*6.5m9.5m*9.5m38.0012958#2.1786.5m*6.5m9.5m*9.5m38.009959#3.1926.5m*6.5m9.5m*9.5m38.00129510#1.4656.5m*6.5m9.5m*9.5m38.0099511#2.6176.4m*18m9.4m*21m60.809152南11大桥左辅道桥0#2.3346.4m*17m9.4m*20m58.8091471#4.0896.5m*6.5m9.5m*9.5m38.

4、0012952#2.9496.5m*6.5m9.5m*9.5m38.009953#3.4206.5m*6.5m9.5m*9.5m38.0012954#1.8756.5m*6.5m9.5m*9.5m38.009955#4.9146.5m*6.5m9.5m*9.5m38.0015956#7.5286.5m*6.5m9.5m*9.5m38.0018957#2.8716.5m*6.5m9.5m*9.5m38.009958#1.8586.5m*6.5m9.5m*9.5m38.009959#2.8726.5m*6.5m9.5m*9.5m38.0099510#1.6456.5m*6.5m9.5m*9.5m3

5、8.0099511#2.3076.4m*17m9.4m*20m58.809147南n大桥右主线桥0#2.3496.4m*17m9.4m*20m58.8091471#2.7796.5m*6.5m9.5m*9.5m38.009952#2.6396.5m*6.5m9.5m*9.5m38.009953#3.1106.5m*6.5m9.5m*9.5m38.0012954#2.5656.5m*6.5m9.5m*9.5m38.009955#3.1046.5m*6.5m9.5m*9.5m38.0012956#5.2186.5m*6.5m9.5m*9.5m38.0015957#1.5616.5m*6.5m9.5

6、m*9.5m38.009958#2.0486.5m*6.5m9.5m*9.5m38.009959#2.5626.5m*6.5m9.5m*9.5m38.0099510#3.8596.5m*6.5m9.5m*9.5m38.00129511#2.3196.4m*17m9.4m*20m58.809147南11大桥右辅道桥0#2.1816.4m*18m9.4m*21m60.8091521#2.7896.5m*6.5m9.5m*9.5m38.009952#4.6496.5m*6.5m9.5m*9.5m38.0012953#2.8906.5m*6.5m9.5m*9.5m38.009954#3.5756.5m

7、*6.5m9.5m*9.5m38.0012955#3.1146.5m*6.5m9.5m*9.5m38.0012956#3.2286.5m*6.5m9.5m*9.5m38.0012957#5.0716.5m*6.5m9.5m*9.5m38.0015958#4.0586.5m*6.5m9.5m*9.5m38.0012959#2.5726.5m*6.5m9.5m*9.5m38.0099510#3.8946.5m*6.5m9.5m*9.5m38.00129511#2.2326.4m*18m9.4m*21m60.809152南n0#3.64017.34m*6.4m20.34m*9.4m59.481214

8、3村中桥左主线桥1#3.64O17.34m*6.4m20.34m*9.4m59.4812143南n村中桥右主线桥0#3.70021.09m*6.4m24.09m*9.4m66.98121621#3.70021.30m*6.4m24.3m*9.4m67.4012162南11村中桥左辅道桥0#3.64022.34m*6.4m25.34m*9.4m69.48121641#3.64022.34m*6.4m25.34m*9.4m69.4812164南n村中桥0#3.70018m*6.4m21m*9.4m60.80121521#3.70018m*6.4m21m*9.4m60.8012152角泰路中桥左幅主

9、线桥0#2.37017.34m*6.4m20.34m*9.4m59.4891431#3.6076.5m*6.3m9.5m*9.3m37.6012942#3.3386.5m*6.3m9.5m*9.3m37.6012943#1.93717.34m*6.4m20.34m*9.4m59.489143角泰路中桥右0#2.37017.34m*6.4m20.34m*9.4m59.489143幅主线桥1#3.6076.5m*6.3m9.5m*9.3m37.6012942#3.3386.5m*6.3m9.5m*9.3m37.6012943#1.93717.34m*6.4m20.34m*9.4m59.489143

10、角0#2.37018m*6.4m21m*9.4m60.809152泰路中桥左辅道桥1#3.6076.5m*6.3m9.5m*9.3m37.6012942#3.3386.5m*6.3m9.5m*9.3m37.6012943#1.93718m*6.4m21m*9.4m60.809152角0#2.37018m*6.4m21m*9.4m60.809152泰路中桥右辅道桥1#3.6076.5m*6.3m9.5m*9.3m37.6012942#3.3386.5m*6.3m9.5m*9.3m37.6012943#1.93718m*6.4m21m*9.4m60.809152杨厝中桥左幅主线桥0#0.79017

11、.34m*6.4m20.34m*9.4m59.4891431#2.9676.5m*6.3m9.5m*9.3m37.609942#1.6406.5m*6.3m9.5m*9.3m37.609943#2.4276.5m*6.3m9.5m*9.3m37.609944#2.50017.34m*6.4m20.34m*9.4m59.489143杨0#0.79017.34m*6.20.34m*9.59.489143厝中桥右幅主线桥4m4m1#2.966.5m*6.3m9.5m*9.3m37.6099472#1.646.5m*6.3m9.5m*9.3m37.6099403#2.426.5m*6.3m9.5m*9.3m37.6099474#2.5017.34m*6.20.34m*