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Recent content by mikolay

  1. mikolay

    Pipe insulation

    How can you install the casing pipe, by open cut trench or must it be jacked uner the road? If jacking is required, then you have fewer pipe choices,perhaps steel casing pipe, or RCP. For insulation in Wisc., we use closed-cell extruded polystyrene boards with minimum thickness of 2 inches...
  2. mikolay

    SPEED BUMPS

    Please review traffic calming theory and practices in the publication: "Traffic Calming, State of the Practice", by Reid H. Ewing, published by the Institute for Transportation Engineers, 1999. This is an excellent resource for understanding what traffic calming is and is not...
  3. mikolay

    quesiton about hold down during pipe installation

    Yes, you need to be careful of the uplifting buoyant force during construction, but especially after backfilling and construction, when the groundwater comes back in to its "natural" elevation. You need to calculate the buoyancy force (per lineal foot of pipe) assuming maximum...
  4. mikolay

    Duties in municiple/public works

    One of the other common challenges is finding new ways of getting programs implemented and projects built using new forms of inter-governmental cooperation and funding, and keeping the private side on the hook for improvements. In Wisconsin and perhaps elsewhere at this time and soft economy...
  5. mikolay

    Leakage test for RGRCP

    By the "Standard Specifications for Sewer and Water Construction in Wisconsin", Fifth Edition, Addn. No. 2, March 1, 1999, Chapter 3.7.0: "leakage test of snitary sewers" includes allowable limits of infiltration based on 200 Gal./In. Diam./Mile. Table 5: Diam of sewer...
  6. mikolay

    Sanitary sewer facilities installed in deep muskeg/peat

    I think you have at least two design "issues", 1: designing and building a suitable foundation, and 2: the problem of having the pipe float upward under the hydrostatic pressure if it is below groundwater level. one refernce is "Buried Pipe Design", Moser A. P., McGraw Hill...
  7. mikolay

    Pressure Fluctuations

    I agree you have very high, and perhaps dangerous pressures. The rapid change in pressure sounds like a water hammer problem. Is this pipeline fed by a well, or what other source. The pump going on and shutting off could be your source of hammer. do you have a dampening check valve in place...
  8. mikolay

    Hydrogen sulphide control in sewage collection systems

    We have used calcium nitrate solution for hydrogen sulfide suppression. US Filter offers this solution by their trade name, Bioxide. They will make dosage calculations for you. Please note that the owner of the sewage collection system may ask you to add more than enough treatment chemical to...
  9. mikolay

    I am looking for assistance in C900

    I suggest you start with your local pipe supplier. They should have some suggestions on proper restraint of hanging pipe. If they can't help, check your periodicals that advertise various restraint devices.
  10. mikolay

    Thrust Block Design

    Have you checked the example used in the DIPRA publication on thrust restraint design?
  11. mikolay

    settled pipeline

    I am not aware of any way to straighten your pipe without destroying it. sounds like there may be poor soils or bedding under it. If you could sonmehow straighten it, you have not solved the issue of poor soils or bedding, and pipe would settle again. If you cannot diturb the road, you may...
  12. mikolay

    Minimum radius of sag bends in a pipeline

    Have you consulted the pipe supplier or manufacturer? Usually they have guidelines.
  13. mikolay

    Boat Ramp Design

    I think the max gradient you want to use is 14% per Wisc DNR guidelines. We use cast in place or precast conc plankes with scored surface. mikolay
  14. mikolay

    ASTM for air pressure testing for FML

    What is FML, sewage force main line? Test like a water main. Check AWWA or local standards. Mikolay
  15. mikolay

    Sanitary sewer design

    Check your state code for sewer design requirements. Mikolay
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