HTURKAK,
Thank you! That has the vacuum testing spec for SS mains I was looking for.
As I said, many of the local Districts here allow this type of testing, but no one has updated their Technical Specs in >10yrs.
The spec you sent is from 2021, which is likely why it's included.
Anyone have any insight or experience with vacuum testing for sanitary sewer mains, and/or any relevant testing specifications from a pipe manufacturer or water/sewer district? Quick background:
It’s standard practice for many local water/sewer districts to perform vacuum testing on sanitary...
Finished grade from a design standpoint is what you step on.
But finished grade for this code is dirt, or final backfill material that's placed against the concrete foundation wall. As others stated, it's not concrete, asphalt, or other hard surface materials.
During the first week of my first engineering job my boss, who had been an engineer for >30 years, asked me to name the three most important things to consider in civil engineering. After staring at the blank look on my face for 10 seconds, he answered his own question:
1. Water
2. Water, and...
Too many factors to consider to give you good direction. Earthwork should be a consideration, and will likely mean you want to keep the home as low as possible, but that could also be a detriment to view corridors (if they exist). You could lower the garage and use a trench grate to keep water...
I can't tell in your sketch where the garage is located, but regardless, it looks like you are sloping the driveway towards the building. You need a low point away from the building which means your driveway will likely get steeper.
After reading your post, what caught my attention was the "truckloads of boulders" used as backfill, likely to try to stabilize the saturated soil. If the voids in the placed large boulders were not properly filled and compacted, this is likely the reason you are seeing the settling in the...
Example:
Speed Limit:
35 MPH (Local)
45 MPH (Collector)
55 MPH (Arterial)
Your design criteria is the Speed Limit, your design control is your road classification. The recommended values for the criteria are determined by the design control information.
We usually shoot for 3% min. grades on gravel surfaces, so I agree with your concerns.
I would think if you express your concerns to your client in writing, and he/she responds and acknowledges your concerns in writing, you should be exonerated from future liability.
BigInch - While poor design plays a bigger part in accidents than speed limits do, speed limits do have an impact on safety. Particularly when unrealistic speed limits are set, which often creates large discrepancies in vehicular speeds, which leads to more accidents.
In general, almost all construction materials have some value of imperviousness, even concrete. But for the purposes of infiltration and water quality attributes, compacted roadbase/gravel is generally not considered "impervious." The addition of topsoil may help improve the situation, but 3"...
This is generally not a one-size-fits-all solution. Depends on a lot of factors, that have been discussed in numerous previous threads. Did you try doing a search?
The idea that a sump pump will encourage more water is generally not true. If anything it will lower the hydrostatic pressure...
We dug a hole next to the leach field and did not find any water, so we're fairly certain the culprit is not groundwater.
I've discussed our issues with a lot of other experts in the field and everyone is perplexed. Best assumption is that the leech field is plugged from accelerated biomat...
We are in the process of selling our house and the inspector brought up concerns with our septic system. Turns out there's about 8"-12" of standing water in the leech field inspection port. The tank is 3-chambers, 1,500 gallons with a siphon in the last chamber. It appears that the siphon is...
Thanks guys. I just spoke with the geotech and they stated they actually avoid recommending reinforcement, even in thicker concrete sections, unless it's on a major highway. They said they've seen too many issues with rebar here in the harsher environments of Colorado. I'll try to do some...
We are designing a large truck delivery parking lot re-paving project and are adding a 12' wide concrete pan to replace a small portion of the existing asphalt. The geotech pavement resurfacing options are: (1) 11" of asphalt on 12" stabilized subgrade or (2) an 11" concrete section with 12"...
