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  1. Drumchaser

    Preparation/Compaction of subgrade for box culverts.

    During and after excavation for box culvert a determination is made as to the need for additional "undercutting" and replacement of the existing material. It is not uncommon to place a seal slab (conc. slab) or stab. material if need. The S T A i am familiar with spec.s out the allowable...
  2. Drumchaser

    Curb cracking next to Slot Drain

    Slotted drain assemblies are a pain in the arse for sure. Our prob.s have mostly been associated with alignment. I would be interested in the QC of the C & G poured. Generally speaking, the curb and gutter prep and placement is usually not on anyones radar until there are problems. While it is...
  3. Drumchaser

    Regulatory trends

    The box girder inserts you refer to are taken care of by the beam supplier and folks at the casting yard. To my knowledge it is not permissible (in this area) to hilti drill into a box or I Girder without some serious mojo. "stability of the girders during erection etc." - We utilize minimum...
  4. Drumchaser

    Regulatory trends

    In my region, I am not aware of ever being allowed to drill into the top flange of a precast girder or adding bolt holes to a steel girder. The standard drawings generally cover most needs. My question would be why would you need to do these things. Our standards cover inserts to be cast in...
  5. Drumchaser

    Water came up while doing excavation work for a road

    Place underdrain system: perf. pipe laterals on a 45 deg angle across roadway (50' spa) tieing to non-perf trunkline which is the outfall into front slope or drainage structure. Have also seen underdrain systems placed along outside (under) curb line. There are a few limitations...the most...
  6. Drumchaser

    Shared use path work zone traffic control

    After you(or your folks) prepare documents for the contractor to sign, and assuming the contr. will sign them and is fully insured/bonded for damages/injuries that might occur..... Ditto on the TCP's, however there is a quite a bit of language about Ped. access/diversion and...
  7. Drumchaser

    Shared use path work zone traffic control

    Sorry to ask but: please define "use our path"....work inside your lane closure? Is your closure long-term? daily? What kind of work are you performing? What is the access for? Is the bridge an overpass...over your closure?
  8. Drumchaser

    Rip Rap on Stream Bed

    Not sure how close to your dwelling the aggr. will be.....large river rock (6-8") looks really nice, and works well also. Not sure about your budget....a paved section with placed rock on top also looks great and is more stable if velocities are significant.
  9. Drumchaser

    Meaning of Passes

    If, after you make a pass, she engauges...then you could be in for a round trip.
  10. Drumchaser

    river access design

    Good lock with the Corps. You may need to take a foreign language class so you can communicate effectively.
  11. Drumchaser

    Trench Shield Books or DVD

    I would recommend that you and/or your folks enroll in Trench Excavation Safety classes, in order to better understand the laws and liabilities that regulate such underground work. There are rigid guidelines established in the industry. OSHA should have some online data on the subject.
  12. Drumchaser

    river access design

    Generally speaking, access points, boating ramp etc.s are constructed at protected areas, that is to say locations where the flow will not erode the bank cuts during rainfall events/cresting of water. (when the river gets up) Sometimes small shallow rivers become large nasty rivers. If the...
  13. Drumchaser

    Asphalt Millings

    Sounds like you have a decent budget for materials.....I would not place the RAP under a new pavt. structure. Have seen problems. Offer the RAP to your asphalt supplier as a cost savings for your new pavement. In this region it is allowed (10-20%+ or -) to be recycled into new mix at the plant.
  14. Drumchaser

    Frequency of OMC/MDD insufficient?

    Agree with cvg "I would not be surprised with this much volume that the material tested in the lab may not always be representative of the material tested in the field" ...also...it has been my experience "sand" is tough to get required compaction on without flooding/rolling with loaded...
  15. Drumchaser

    Reusing Pavement Millings

    I would not recommend a rejuv. agent. If the millings are placed on a decent subgrade (hard layer) and placed and rolled in during hot weather the matl. should slick over and create a somewhat sealed surface. (This depends on the quality of the RAP.) If the subgrade is not stable, large...
  16. Drumchaser

    Strange 'percolation' of clay through grass

    the dripped part sounds like crayfish mounds.....but the ones I am familiar with are not as large as your description.....how bout a picture....it should say a thousand words. (sorry)
  17. Drumchaser

    I need some help indentifying this piece of equipment

    I agree with Ron.......because I am too young to recognize such primitive testing equipment. Sorry Ron [wink]
  18. Drumchaser

    Precautions after Rainfall event

    Subgrade Even properly compacted fill that has been rained on should be allowed or forced to dry, recompacted, retested. Depending on how the subgrade was shaped, sloped to drain, sealed off, and what type of material it is would be the determining factor on how much corrective work will be...
  19. Drumchaser

    Temp. shoring and compaction

    Utilize temp. MSE wall "basket type" filled with graded aggr., filter fabric,.... then the temp. wall is left in place as the adjacent fill is constructed. This is done routinely in my region with good results.
  20. Drumchaser

    roadway over Landfill

    Long Bridge.

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