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Recent content by cdh61

  1. cdh61

    Timber piles embedded in concrete

    Robertofg, You could drill a hole through the timber pile and place a rebar in it and cast it into the grout at the toe. Now your timber pile uplift force will also be resisted by the shearing of the timber and rebar. I have used these type of detail in pole frame buildings. I do not have the...
  2. cdh61

    Residential Slab Foundation Recommendation

    sunpat, The geo's recommendations must address foundation requirements better than you stated above. Ask what depth the adequate soils are founded at, and other items such as what are the compaction requirements of stone, just leaving it to a contractor to say compacted can lead to problems...
  3. cdh61

    Tying into existing foundation (residential)

    pmkPE, You will have to look at the stresses from the footings (if used) of the new addition and how they impact on the block wall. Just placing footings a few feet down adjacent the old block foundation wall may not be acceptable. In some cause like this you may have to place the new...
  4. cdh61

    Distance from toe to daylight. Block gravity wall on slope

    crstrode, I am not sure about your question. But, if the contractors engineer had completed the stability assessment and design of the walls, then it may be best to discuss your questions with them. The distance from the toe of the wall or slope to the retaining wall depends on site and soil...
  5. cdh61

    Lateral earth pressure

    Rancorinco, Just a note, do not think that the lateral soil stress will not "kick in". There are lots of people who are killed every year due to standing soil cuts and think it will be OK to work beside. Without looking I can recall a handful of people killed while working adjacent to over...
  6. cdh61

    Maximum Dry Density

    Rookie2, Best to have a look though ASTM D698. But overall, if the granular was compacted and the density was not impacted by seasonal changes then loss of moisture would not necessaryly decrease dry density value it can increase it. I am not sure what you mean by 88% to 96% depending on...
  7. cdh61

    SPT values in Sands

    burao, Yes you could end up with higher values if you used hollow stem augers rather than solid stem, but not always. With solid stem augers you may not have placed the SP on the native sands but rather on slough from the side walls of the bore hole. The reliability of the data depends on...
  8. cdh61

    Stability of Reservoir Bank

    CED ? You should evaluate the site based on slope stability. But you most likely will find the impact from the development on stability to be negligible. Toe erosion may not just be caused by wave action, soil (toe) softening may also occur as a result of high water levels, thereby causing...
  9. cdh61

    Effect of surface surcharge on slope stability??

    JasonG Waht is the existing fill, and what will the new fill be? regards
  10. cdh61

    Addition - Full Basement Foundation next to Slab Foundation

    SkiOn1, You should just hire a local engineer to do a test hole and provide the required design drawings to a local contractor or yourself. But, inform the engineer what you are planning, say you will be doing the work over xxx time frame, then design details can be best fitted for situation...
  11. cdh61

    Drilled Pier installation near a MSE wall

    evenbetter, The 4.5 ft away from the toe of the MSE wall should not be a problem, but you will need to assess soil conditions to ensure there will be no problems during drilling or during the pouring of the concrete. A fast set concrete may be required depending on site conditions, such as the...
  12. cdh61

    Connecting a new concrete foundation to an old stone one?

    jeansa, I assume the old foundation is on a strip footing given it is stone. The connection detail could be completed different ways, but you will still have the hinge/week point at the interface. The footings in the old and new may not move the same, and therefore you should expect...
  13. cdh61

    Load Test for Segmental Block Retaining Wall

    emceditor, Did you check the blocks to ensure no manufacture defects? This would not take much time or money, and I would check because the subcontractor will most likely be looking for others to share in the cost of reconstruction. regards
  14. cdh61

    Retaining Wall Questions

    elfman, Do a review of the information on the topic of retaining walls in the form. Lots of references given. A design of a retaining wall should be completed by a person who practices in this field. Best to contact a local who can aid you in the design and provide advice as required. This...
  15. cdh61

    Concrete Trench Wall Movement

    m1e9r5c6, You have a few options, 1st, if you could live with the existing movements then you may be able to tie back wall to prevent further movements. 2nd, soil removal then jacking can work, but most likely the wall is already cracked if it has moved any noticeable amount. And you will...
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