箱涵拉森钢板桩支护专项施工方案

箱涵深基坑专项（方案）报审表工程名称：偃师市滨河路与国相交处箱涵工程致：河南新恒丰工程咨询有限公司

施工单位：洛阳建兴市政工程有限公司我方已根据施工合同的有关规定完成了偃师市滨河路与国道相交处箱涵工程深基坑专项施工（方案）的编制，并经我单位上级技术负责人审查批准，请予以审查。附：箱涵深基坑专项施工（方案）承包单位（章洛阳建兴市政工程有限公司项目经理：日

期：

201716专业监理工程师审查意见：□□□

同意修改后再报（见附言）不同意专业监理工程师：日

期：总监理工程师审核意见：□□□

同意修改后再报（见附言）不同意项目监理机构：总监理工程师：日

期：附注：特殊技术、工艺方案要经总监批准，一般由监理工程师审批。

偃师市滨河路与道相交处箱涵工程深基坑施工专项方案编

制审

核审

批编单：洛建市工有公编日：201711月16日

目

录一工况·····························································1二施工及1钢板桩施工的一般要求······························································22钢板桩施工的顺序····································································23钢板桩的检验、吊装、堆放·······················································24钢板桩施·············································································5挖土··············································································56钢板桩的拔除·········································································7钢板桩土孔处理·······································································6三安施措施四拉扣桩力1项目概2计算依3支护布置情况简······························································94主要材料力学性······························································95主要计算内容···································································106计算过程及结果

一、工程概况位路面宽度40m40米，道（商都G310G310（商都南路）交叉，采用下穿的方式通过。本部分（2.5米人3米+0.5米机道310栏+1米人行+17.4+1道动车道与为1.5%行道向1.5%。混凝

二、施工工及方法型长拉森机112基避免不规则的转角，32123挖土453、1

ab）割孔、断面缺损的应予以补强c）若钢包括钢材每重的235垫3-4米过米4本工程施工最关键的工序之一，

（1）全15m（2打剔除连接锁口锈蚀变形严重的钢板桩，（3）打（4）逐步将

2(5）密扣2（7）外

9钢5、挖下1m米处装型钢围檩并焊接加固。6尽早拔除加拔桩后马

（1）拔利扰动土质2桩动5min过1．5h7三、安全施工措施12靠近民房处需要进行观测,3后4、为“安”5

6789、凡“11、在用“三”关

16四、

拉扣桩力算

基支方及置意（JGJ05-201120118-2006G310箱南（2017.05H=8.0m，钢度，钢板为为φ28（6×7类D530×9mm螺旋管为2.0m管深度为计24

3弯

钢6×7类度1570MPa，钢丝绳最小破断拉力。：弯fv距m)

φ530×9.02（JGJ坑7.0进行（截面验算抗倾覆验算体1

20度度m)高m)积矩量

JGJ

弯2

012

)1

------

3

12

4度m)

2

度m)

5

m土类名称层厚

与锚固体3)3)(度)

12

黏聚力

m,c,K值不(kPa)(度)

12

mm

6

1

1

2

2

7工1

8设计参度m)数9计

计算结

1矩矩力

算力=Mn/Wx=177.384/(1350.000*10-6)=<f算力=Mw/Wx=134.795/(1350.000*10-6)=<f=中

σwai(σnei(值值对轴的量(m

3);f(

-度径m)=标X=标Y==>覆矩算矩,定况=满足规范要求。12）

：·····=≥1.600K=Dγ/hwγwK==>=Kh=基坑底部土抗承压水头!:———度D——度———水的重度(—(m);—值11K式度嵌固构造=0.800×8.000=6.400m

值>=6.400m,嵌固段1：=≤=，土（kN）；（kN）。。20118-2006力为间距为2为0.0m1度度.5m。1

2基本信0度度m)高m)

JGJφ530×9.0

弯剪距m)

0113

)1------4

1

52

度

度m)

m6土类名称层厚

与锚固体

3)

3)(度)

12

黏聚力

m,c,K值不(kPa)(度)

12

mm

7土类

外侧土压调整系数12

12

81

9度m)数

截面计

1

矩0.00矩力

算力=Mn/(γ*Wx)=0.000/(1.050*1887.170*10-6)=<f=算力=Mw/(γ*Wx)=-6)=<f中

σwai(σnei(值值对轴的量(m

3);f(——;

度径m)=标X=标Y==>覆矩算矩,定况=