Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Davidmat

    Sliding and Overturning Factors of Safety during Construction

    I have a thought. When performing stability analyses for proposed retaining walls, I usually neglect passive forces because of potential future disturbances such as utility excavations or scour. If the passive force is there during construction, why not use it and keep the same factor of...
  2. Davidmat

    Sliding and Overturning Factors of Safety during Construction

    I am performing a stability analysis on an abutment and wingwalls for the design of a bridge. Considering in-service loading, the minimum factors of safety for overturning and sliding that I typically use are 2.0 and 1.5, respectively. When looking at "during construction" conditions, I am...
  3. Davidmat

    lateral earth pressure between concrete wall and sheet pile wall

    PE-Inc, The existing abutment wall is up to 19 feet tall with a 2.25 foot thick stem, a 3.5 foot wide toe and a 2.25 foot wide heel (toe and heel dimensions seem backwards, but that is what the existing plans indicate). I'll get back to you on the tieback force versus stem capacity (need to...
  4. Davidmat

    lateral earth pressure between concrete wall and sheet pile wall

    Tieback Alternative Overview - It was determined that a load of 1.65 K/ft applied at 5 feet below the top of wall would be required to bring the factors of safety for sliding, overturning, and bearing capacity to meet the state specified limits. The analysis included all the usual forces on the...
  5. Davidmat

    lateral earth pressure between concrete wall and sheet pile wall

    The area between the existing abutment and the sheeting will be filled with soil. The sheeting will be vibrated in through the existing fill behind the wall, followed by excavations in front of the wall to install the wales and tiebacks (if anyone would like details of the constructability, I...
  6. Davidmat

    lateral earth pressure between concrete wall and sheet pile wall

    More information - The sheet pile wall to be installed behind the abutment will be designed to support a height equal to the height of the adjacent abutment. This includes installing a line of tensioned tieback anchors for reinforcent. The sheeting wall deflection was estimated at up to 1.25...
  7. Davidmat

    lateral earth pressure between concrete wall and sheet pile wall

    I am presently working on a bridge replacement project where the existing abutment will remain. However, in order to increase its stability under the new loading, a sheet pile wall is proposed to be driven behind this existing wall to reduce lateral earth pressures. The sheeting will need to...
  8. Davidmat

    Spec. for mixing soils?

    The soils to be mixed are generally granular with high silt contents (~25% silts). The soils contain elevated levels of metals and semi-volatile organic compounds (SVOCs) above Rhode Island Department of Environmental Management (RIDEM) Standards.
  9. Davidmat

    Spec. for mixing soils?

    Is anyone aware of a spec or proceedure for mixing two types of soils together? The existing fill soils at our project site are too silty to use as a common borrow. If we were to mix them with a state standard gravel borrow (50/50 ratio), this soil sould be re-used. In addtiion, these...
  10. Davidmat

    Density of stockpiled scrap metal?

    I am looking for densities of stockpiled scrap metal to Estimate ground bearing pressures at the base of the pile. I am assumming that densities will vary from the top of the pile to the bottom. I've done some research and came up with densities between 70 and 80 PCF but found that hard to...
  11. Davidmat

    Stop Log Swell

    I am designing a new flash board structure for a dam which will consist of a metal frame and wooden stop logs. The stop logs will be 5-inches thick and will be Southern Yellow Pine, Construction grade. How much should I expect the wood to swell once they are submerged for a long period of...
  12. Davidmat

    Stop Log Swell

    I am designing a new flash board structure for a dam which will consist of a metal frame and wooden stop logs. The stop logs will be 5-inches thick and will be Southern Yellow Pine, Construction grade. How much should I expect the wood to swell once they are submerged for a long period of...
  13. Davidmat

    leakage rate through Cold Formed Sheet Piles

    I am looking for literature on estimating seepage rates through cold formed sheet piles. Can somebody help me? Thanks.
  14. Davidmat

    Older ARBED combined wall sections

    You may be able find an answer by calling Skyline Steel Corporation (1-973-428-6100). They are a major supplier of sheeting products with offices Nationwide. Good Luck.
  15. Davidmat

    Compaction specs for crushed Stone Under Foundations

    Our Bridge footing design calls for 12 inches of crushed stone under footings. The stone was selected due to the presence of ground water. What would be a typical procedure to adequately place and compact the crushed stone and what kind of testing procedures are available? I am familiar...
  16. Davidmat

    Expanded Tunnel Linings

    Try this Website: http://www.bham.ac.uk/CivEng/resproj/sharpe/pub1.htm Good Luck!!
  17. Davidmat

    Mononobe-Okabe (MSEW vs. Gravity Walls)

    I am in the process of developing geotechnical recommendations for performing seismic analyses on Mechanically Stabilized Earth (MSE) Walls and also for Concrete Gravity Walls. According to DOT specs, the Mononobe-Okabe Method is required. I am familiar with the seismic analysis on Concrete...
  18. Davidmat

    Soil Bearing Capacity under Pipelines

    Are there specific methods (other than the classical shallow foundation formulas) for estimating the bearing capacities of the soils underlying an RCP in a trenched excavation? I am a geotechnical engineer in the process of designing a foundation system for a 54-inch diameter (RCP) combined...

Part and Inventory Search

Back
Top