Moisture buildup between tile and concrete floor slab (Photo attached). Shallow water conditions are known to exist in the area. Perimeter french drain was installed over 4 feet deep, however, issue now noted in central portion of building. I believe it's due to head pressure after removal of...
We'll be looking at a site with up to approx 50' of granular, rocky fill material. I've never used one, but I'm thinking a Becker percussion rig would be best for exploring the fill material, what do you think?
How are Becker blows usually recorded in the field? Can anyone recommend a...
I have a home site with rock on one side. On the other side is up to 23 feet of very loose, low plasticity, clayey sand, with water levels at about 4 feet. Just looking for other ideas for support, except for driven piles or conventional concrete piers. There is a little resistance in the...
We normally just use the AWWA 10 point scale for soil samples collected from test borings to help provide some guidance on polywrap requirements. However, pipes are always bedded and shaded with select material. Therefore, is it appropriate to test the native soils in the trench to determine...
I have a lagoon with silty sand side slopes. I have not visited the site yet, but pictures are attached. This is their 2nd slope failure, and they are seeking outside opinions. I am currently thinking about recommending a geocell product with gravel infill. My second thought is plating the...
I'm really not very satisfied in my current career in geotechnical engineering. I work for a small consulting firm doing typical geotechnical work, and no longer look forward to dealing with contractors. I was curious what other kinds of career opportunities there might be in which a civil...
A local material supplier wanted information on corrosivity of his select and base course materials to provide to clients.
We had the following tests run to check for iron pipe corrosivity: pH, resistivity, sulfates, chlorides, sulfides, & REDOX.
I'm not sure how to interpret the Sulfides...
I'm really confused here.
I will be running the double hydrometer test (ASTM D4221). Section 8.1 says to use 50g of oven dried soil to run a normal D422 hydrometer test. However, 8.3 says to run the test without any dispersing agent or mechanical agitation using only 25g of oven dried soil...
I will be involved in the FEMA certification of an existing levee. The levee is up to 20 feet tall, 2:1 slopes with 12-inch thick, rock filled gabion mattress protection. The levee is 15 years old with 6 to 7 feet of freeboard, and no signs of any stability issues.
I am looking for any...
I'm confused on how exactly to determine compression or consolidation ratios or indices using a strain-LogP graph. Then how the ratios or indices should be used for consolidation estimates. I've read Bowles' discussion, and am not yet "getting it." Also, generating the ordinate (Log e) of...
Our City is looking into creating a catalog of all significant roads to develop a measuring system for rehab/rehabilitation. One important factor in categorizing the roads is existing pavement structure.
We will use borings for some roads, but are looking for possible non-destructive...
