几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 - 查看单个帖子 - vertical component of equivalent fluid pressure on footing

vertical component of equivalent fluid pressure on footing
i'm currently working on an abutment design for a bridge out in lee, ma. in a couple of my load conditions the water table is above the top of footing.
basically, the abutment footing is 3' thick; there is 5' of saturated soil above the footing, then 2' of dry soil above that.
the geotech report gives a single soil density of 120#/cf
i had planned on taking the (density of the soil in the dry times its respective area above the footing) and adding it to ((density of the soil minus the density of the water) times its respective area above the footing)...
am i missing something? a coworker seems to think i have to account for the weight of water when it's surrounded by water???
please advise鈥?br />

if you are using the saturated unit weight, the weight of the water is already included in the soil and there is no need to account for the water separately. verify the saturated unit weight w/ your geotech.

2009-09-16, 06:16 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	vertical component of equivalent fluid pressure on footing vertical component of equivalent fluid pressure on footing i'm currently working on an abutment design for a bridge out in lee, ma. in a couple of my load conditions the water table is above the top of footing. basically, the abutment footing is 3' thick; there is 5' of saturated soil above the footing, then 2' of dry soil above that. the geotech report gives a single soil density of 120#/cf i had planned on taking the (density of the soil in the dry times its respective area above the footing) and adding it to ((density of the soil minus the density of the water) times its respective area above the footing)... am i missing something? a coworker seems to think i have to account for the weight of water when it's surrounded by water??? please advise鈥?br /> if you are using the saturated unit weight, the weight of the water is already included in the soil and there is no need to account for the water separately. verify the saturated unit weight w/ your geotech. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]