Trench Compaction with obstacles
Trench Compaction with obstacles
(OP)
Hello All.
Any help would be appreciated. We are backfilling a 8" sewer line. The cuts are approximately 12'deep.The trench width is three feet. The existing trench wall material is a silty sand. Max of 125.0 at 10 % H20. The next section we will do has a few existing utility crossing thru trench at about 3-5 feet below the finish grade, spanning about 4 foot linear. I am doing the compaction testing on the fill and am a little concerned about the access for compaction equipment in and around these crossings. They are dry utilities as well a small pvc irrigation line. Wouldn't be to concerned about it, but is in a proposed street area. The engineer does not want any water jetting performed. My suggestion was to fill the trench in this area with sand around these crossings and water-jet. The engineer is concerned about water not being able to go anywhere due to the existing bottom of trench as well as side facing material.
Any ideas would help to achieve proper compaction around these obstacles. Have to deal with this Monday morning?
Thanks,
Bill
Any help would be appreciated. We are backfilling a 8" sewer line. The cuts are approximately 12'deep.The trench width is three feet. The existing trench wall material is a silty sand. Max of 125.0 at 10 % H20. The next section we will do has a few existing utility crossing thru trench at about 3-5 feet below the finish grade, spanning about 4 foot linear. I am doing the compaction testing on the fill and am a little concerned about the access for compaction equipment in and around these crossings. They are dry utilities as well a small pvc irrigation line. Wouldn't be to concerned about it, but is in a proposed street area. The engineer does not want any water jetting performed. My suggestion was to fill the trench in this area with sand around these crossings and water-jet. The engineer is concerned about water not being able to go anywhere due to the existing bottom of trench as well as side facing material.
Any ideas would help to achieve proper compaction around these obstacles. Have to deal with this Monday morning?
Thanks,
Bill





RE: Trench Compaction with obstacles
perhaps this might be a good place to use lean concrete in the hardest to reach spots as long as the contractor provides some cushion/protection immediately around the pipes. good luck
RE: Trench Compaction with obstacles
RE: Trench Compaction with obstacles
RE: Trench Compaction with obstacles
Thanks Again
Bill
RE: Trench Compaction with obstacles
RE: Trench Compaction with obstacles
RE: Trench Compaction with obstacles
RE: Trench Compaction with obstacles
A thesis topic for an English major finding himself working construction because of a shortage of English-major jobs: "Regional Linguistics and Informal Terminology in North American Construction-Site Usage."