The ground beyond the creek banks is at one elevation, not two elevations, as you drew it. The abutments are buried on both sides, not retaining anything. The structural engineer is concerned that the soil between the abutments and the creek banks won't provide passive resistance because of...
There is a 10-foot deep, shotcrete lined creek with a pedestrian bridge being built over it. The banks are inclined at 1/2 to 1. The ground away from the banks is level. The bridge will use concrete abutments, 3 feet wide by 10 feet long, by 5 feet deep. The abutments will be about 10 feet...
MTNClimber, I used the website you referenced. And two others. They don't work on site class E soils.
I could do it by hand, but the usual procedure is apparently no longer valid for E soils. Otherwise, I would get a result as I do using ASCE 7-10. I need to see Section 11.4.8 in ASCE...
I'm from San Francisco and got my BA in Geology from UCSB. When it came time to get a master's in engineering geology, I decided on Imperial College of Science and Technology in far off London. It's the MIT of Europe with perhaps the best engineering geology program in the world. IMHO. It...
I'm working on a site in Foster City on very soft Bay Mud, site class E. In running the software to obtain the seismic parameters, I got the message, "null-See Section 11.4.8" for Sms, Sm1, Sds, and Sd1. I don't have a copy of ASCE 7-16. I found a paper on what to do, but it was unclear. Any...
We drilled three soil borings and did a few lab tests. There is stable bedrock at a depth of 7 to 10 feet. The landslide is not very big. 50 CY. The retaining wall will be a maximum of 4 feet tall, however we are neglecting passive resistance above the slip plan of the slide, since we can't...
As I said above, the landslide mass will be removed and replaced with compacted fill on a benched cut. There's no sewer treatment plant in the area. It's rural, but a small lot. There's no room to relocate the leach field. Anyway, everything has been worked out with the County. It's just a...
The complete picture: The ground above the retaining wall will be excavated, benched, and replaced as compacted fill. The slip plane will be gone. The uphill slope will be inclined at 4:1. The County will not allow weep holes or sand or any sub-drainage at all. There's a creek downhill from...
I have a landslide repair job with a proposed stitch-pier wall. There will be a leach field right behind the wall, so the permit agency won't allow a subdrain system behind the wall. The active soil pressure would be 50 PCF if it were drained. If pore pressures can build up behind the wall...
I've proposed a bioretention area for a project which is sized based on the runoff volume. This is in California and is based on the C3 Technical Guidance Manual. I used a void ratio for biotreatment soil and for Caltrans class 2 permeable material of 0.35. However, the County Planning Dept...
The fire chief wants me to prove that a gravel ranch road is adequate to support a 75,000 lb fire truck. Being a ranch road, traffic is very light. There will just be the occasional, if ever, instance of a fire truck driving by.
Normally, I use EAL, TI, etc., along with R-values to design a...
I need to find out how deep some existing drilled piers are. The house addition was built without a permit, and there are no records related to the drilled piers. They are 18-inch diameter concrete piers with rebar, located along an exterior wall of the house.
I could use a back hoe or...
I'm doing slope stability analyses on a small slope. It's under a building and never gets wet. No groundwater. The soil is slightly cemented silty sand, phi=45, c=600. The FSs are very high, as I knew they would be, but the County wants me to do the analyses, anyway.
The static FS is 6.5...
Thanks, ProDraftsman. UCS worked. I typed in UCS but it was already set on world. I typed 'world' anyway, hit enter, and the problem was solved. Must be a bug. I guess I know why you call yourself "Pro".
I experimented with "copybase". As a test, I drew a circle with its center at 0,0. If I type copybase, and specify 0,0 as the base point, then select the circle, the circle will be centered around the cursor while I move the cursor around the screen looking for a place to paste the circle...
I am copying and pasting within the same document, which has decimal units in feet. I always use Control C and Control V, and I can always (almost) just click on where the object will go. The insertion point (cursor) is normally at the lower left corner of the object.
But my problem is, on...
In autocad LT 2000, on some files, when I copy and paste, the paste insertion point is far from the mouse's crosshairs. In other words, if I zoom way out, I can see the object I'm trying to paste far from the cross hairs. So when I click where I really want the object to be, it ends up far...
Thanks, bob3306. The driveway is 100 feet long, but it splits off another driveway that goes next door. I can make it work using segments like you describe. It never snows here, so 20% driveways are somewhat common.
I've done that before with a fire engine. I was hoping there was a standard rule of thumb.
As for jacking the garage up, it has rooms above it. The only way would be to demolish that whole part of the house and re-do the roof. The builder took a lot of short cuts in building the house...
