We have a project where a set of communication conduits are immediately adjacent to foundation improvement work(compacted aggregate piers).
The design-build contractor proposes to encase the PVC conduit in 3000 psi concrete to protect it from the drilling, filling and compacting operation...
I'm working on a project involving temporary excavations to provide working benches for installation of permanent shoring walls. The boring lots indicate the material is fill comprised of Ml, GM, SM, GP materials. Stability analysis of existing topography indicates the slope is not stable as...
I'm looking at working with a client that has foundation performance issues. The single-story wood-frame structure consists of continuous foundations with short stem walls that step down a natural slope on all four sides (northwest corner near original site grade, remaining corners lower with...
I'm working on a project in California and have designed the AC pavement sections using the Caltrans method. I've also calculated the structure sections using the AASHTO methodology. In order to design the AASHTO sections, I've used the empirical relationship recommended by AASHTO to convert...
We're looking at a project where the COE filled in a low lying area adjacent to a river about 50 years ago.
While there are cross sections pre/post construction, there is no available documentation regarding what the depth, make up, or in place consistency of the alluvium was prior to placing...
Hopefully someone can help shed some light on a dilema I'm encountered on a fill construction problem.
We're involved as the geotechnical engineer on a project that involves construction of some minor fills (2 to 4 feet)for light weight, single-story structures. During construction the on-site...
A client is looking to place a pool in his backyard; to make the best situation, he is looking at terracing the yard and wants to use segmental walls for aesthetics.
The main retaining wall will also form the pool wall, and could either be masonry or concrete. Is/are there any...
I'm working on a project in which the structural engineer is requesting values for "dynamic subgrade modulus" for input to his computer model. This will apparently be used for modeling the dynamic response of the soil foundation. I'm not familiar with this parameter, and this is the first time...
I'm updating a spread sheet used for calculating liqueaction potential. The sheet incorporates a formula for stress reduction presented in 1997 NCEER workshop. A paper presented in 2004 by Idriss and Boulanger at the combined conference for ICSDEE and ICEGE recommended an alternate calculation...
I'm working on a project that will involve temporary shoring with sheet piling in order to expand a waste treatment plant located with about 100 feet of an existing flood levee. Excavations will be on the order of 20 to 25 feet deep, of various sizes, and site is located on alluvium consisting...
Hi:
I'm currently looking at some alternatives to address loose alluvial soils (silty sand: SM, poorly graded sand: SP) that extend to the water table (-10 bsg). In order to address static settlements above the water table, one approach proposed is to remove and reconstruct to the standards...
Ladies and Gents,
I'm preparing a rigid concrete pavement design for a small office complex. The pavement sections will be 4.0 and 5.0 inches thick. In reviewing details for the different joint designs, I'm in a quandry regarding the "construction" joint detail.
With construction joints in...
Hi,
I'm looking at several cores taken from a concrete foundation that was reported to have included concrete that was placed well after 90 minutes after batching. While I've found some localized zones where irregular-shaped voids are present (likely from poor consolidation), there are...
Greetings!
I'm working with high-strength bolting on a metal building that will be erected in temperatures near 0 degrees C. However, seasonal temperautes can range to near 35 degrees C. Does anyone have any guidance or references regarding the impact of temperature changes on bolt tension...
I'm reviewing N value data corrections for sampler size between SPT, modified California, California, and Dames & More split-spoon samplers. I'm interested in getting additional information regarding this correlation. I've reviewed Burmister (1948), Lacroix & Horn (1973), and some empirical...
