Read on for updates to ASTM standards related to geotechnical engineering, materials testing and related disciplines for the month of February, 2011. Standards associated with concrete aggregates and addmixtures / additives have been updated, as have several standards related to coring, sampling and testing of soil-lime mixtures.
7 February 2011 – Strata Systems is offering a free software tool, StrataSlope™, to help in the design of reinforced steep slopes and walls. The software includes material estimating, limit equilibrium analysis, direct sliding stability […]
For a wind farm near Lawton, OK, many of the foundations consist of rock sockets 19 feet in diameter, 20 feet deep. The rock was blasted to presplit the holes and facilitate excavation. The bedrock […]
[Editor] The pile driving analyzer or PDA is used to measure the response of piles during driving. It was originally developed to analyze pile drivability, but is sometimes used as a substitute for pile static load tests to determine . Mr. Scott A. Barnhill, P.E., Executive Vice President of consulting firm GeoEnvironmental Resources, Inc. located in Virginia Beach, Virginia has seen PDA being used and misused over his 33-year career. In this article, Mr. Barnhill describes pitfalls in relying solely on the PDA for pile capacities, and also describes what PDA is good at and how it can be used successfully. [/Editor]
A 50-ton boulder caused severe damage to a La Crosse, Wisconsin home after a rockslide event near the appropriately named Cliffwood Lane. Residents in some adjacent houses were asked to evacuate as well. Click through for the news coverage of the rockslide. [Source and Image: WXOW. Hat tip to USGS]