Need a book? Engineering books recommendations...

# Re: Soil Pressure

• To: seaint(--nospam--at)seaint.org
• Subject: Re: Soil Pressure
• From: Chris Lillback <dr-dirt(--nospam--at)home.com>
• Date: Tue, 26 Jan 1999 18:06:37 -0800

```not correct

Francisco Duarte wrote:
>
> Hi,
>
> I am working on a project for which I am designing a retaining wall. The
>
> The basement wall should be design to resist a lateral earth pressure
> equivalent to a fluid weight of 35 pound per cubic foot , and an
> additional uniform pressure of 15H pound per square foot, where H= back
> fill height above the base of the basement wall footing in feet....
> Additionally the basement wall should be designed to resist lateral
> pressure induced by earthquake. An additional earthquake -induce
> pressure equivalent to a fluid weight of 20 pounds per cubic foot may be
> used in design. However, distribution of the lateral pressure should be
> taken as an "invert triangle " with its resultant force acting at a
> point two third of the wall height above the base of the wall.
>  Now I have tried to calculate the active overall presure and I came up
> with 75 psf(no including the 15H), which I think is to high and the
> soils engineer says there is something wrong in my calculations.  When I
> ask him/her to give me his calculated number, the only thing I recieved
> was a diagram in which he/she shows the 15H psf rectangle , 20H psf
> rectangle and a 15H psf triangle
> I guess I am missing something here.
> 1- Why can he/she give me a straight foward numerical answer?
> 2- What will the answer be for a  8 feet wall ?
>
> --
> Francisco Duarte
> Lea and Sung Engineering, Inc.
> Tel: 1-510-887-4086
> Fax: 1-510-887-3019
>

```