I may never recieve any prizes for my literary skills, I just try and explain the methods and processes used in a way that the average joe can understand!!
We just wrapped up a 3.4 acres pipe yard for JC Inspections in Porter Tx and I would like to explain and discuss some of the steps and techniques used in the construction of the site.
The first step site to clear and grub the entire 3.4 acres and haul off the trees brush and stumps and grub the entire site with the rake attached to the front of the dozer blade. This removes and roots or stumps and any other organic matter left behind.
Once this is completed the entire site was stripped 4 to 6 inches to remove any and all organic matter left behind from the clearing and grubbing.
This completed the engineer had a topographical survey done on the entire site in order to design the initial grading plan since we were to be tying into an existing 8 inches of crushed concrete base and drainage inlets. Once the initial grade cuts and fills were established with grade stakes we used a dozer to grade the entire sight to meet the specs of the grading plan.
This phase is for the drainage type -A inlets. The developer of the complex allowed detention for all property owners. We had to saw cut a 8 ft wide access in the bend of the ditch leading to the detention area. Once this was completed we cut the ditch approximately 8 inches below grade and backfilled with six inches of cement stabilized sand allowing the extra two inches for the thickness of the pipe to achieve the proper flow line. We used for this project 24" and 18" hdpe pipe. The pipe was set to the proper grades to the first area calling for a 30x30x48 type-a box and grate, which then to carry on through the box we went down to an 18" hdpe pipe size to the second type inlet box also bedded in with stabilized sand 90 degrees out of this box we went the last 130 ft and put the last box in to he proper grades. all pipe once checked and centered in the ditch was covered up to about 4 inches over the top with the stabilized sand and compacted with a plate compactor.
The next phase is stabilization, in this case a lime slurry was called for at a rate of 200 tons for the entire sight 10 to 12 inches deep. We used a Caterpillar mixer to achieve this as we had to mix and level off and apply the slurry several times over the entire area to achieve a uniform and consistent mix. This being completes we used a smooth drum 84" vibratory compactor to compact the sight to a minimum of 95% compaction as tested by a soils technician.
We then regraded the entire site back to grade using two dozers and compacting as it was regraded. ( you can almost never compact any soil or rock or any material too much when great weights will be driven on it after completion) once the regrading was complete we staked the sight for 9" of rock one section at a time and started laying down the rock using a 650 lgp John Deere dozer. The extra inch is to allow for compaction with a finished grade of approximately 8". We put down approximately 6000 tons of crushed concrete over the entire job roughly 350 12 yd 17 to 18 ton truck loads. Thats a whole lot of rock!!!
Once the entire sight was covered with and compacted the flow lines were checked and graded as needed to ensure proper drainage to the inlets we had earlier installed.
This is how we carried out the project and I am sure as with anything there will be differing opinions. At the end of the day the customer received a great product properly constructed which will last them many years to come with proper maintenance.