I am working on a problem with 'vortexes' forming in a MH . there are 2 18 inch HDPE suction lines to 2 different pumps. They are moving 5300 gpm down 2 18 inch bypass lines. The suction lift is 18 feet. Submergence is 5 feet. I have a graph to pull minimum submergence from and a calculator...
I am working on designs for some tunnel liners. the spec calls for using soils with 100 psf cohesion and a deflection correction factor of .6 . I figured out the cohesion issue but cannot find where to use the correction factor. Any help would be appreciated
Richard A. Cornelius, P.E...
We have a 33 inch sanitary main leaking 4 gpm through a 1 inch diameter hole. what formula can I use to get the head pressure driving the infiltration?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I just got an email saying I have to design some flexible liners for a pipe. They want me to use the Passive Soil Modulus from AASHTO LFRD Section 12. Isn't that some Highway or bridge Design process?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
What is the difference between H-20 traffic load and HS-20 traffic load? The size and weight of the truck?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I have to design thrust blocks on a sanitary force main. I figured out the horizontal 1/16 bends. However, I have an 1/8 bend that are rolled down to drop the line to the pump station entrance and the next one rolls up to level out the line as it goes through the pump station wall. Should I...
I am trying to find the Flex Modulus for 9,000 psi concrete. It seems that is not tested for on a regular basis. I have the Flex. strength as 1,600 psi. Any help would be appreciated. Thanks
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I am trying to design some manhole rehab liners. I have always used a design process from the American Concrete Pipe Assoc. The client wants me to use a 'buckling' formula from the CIPP ASTM F1216. What are any of you using?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I am trying to find out what HL-93 loading really is. If it is an HS-20 truck on top of a concrete slab, wouldn't the slab have to take some of the load by deforming before the load would be transfered to the soil? And wouldn't the contact area be the area of the slab?
Richard A. Cornelius...
We have a Ductile Iron Pipe carrying domestic sewage supported by pylons over some creeks anbd ravines. We will be lining this pipe with CIPP. What kind of analysis would I be doing to make sure that the pipe does not snap between supports. This is a gravity line, so each support will be lower...
I just had a question about how to do a live load calc. for a pipe with an axle load of 102,000 pounds. Has anyone else seen this size load? The project is in CA. Maybe to take into account earthquake? Seems like a very heavy vehicle. This wa not an aiport but I-5.
Richard A. Cornelius, P.E...
Hello, I'm a Civil Engr. and cannot find this info. Does anyone know what the friction factor is between two sheets of polyurethane as one a pulled across the other.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I just got asked a question I hadn't heard before. I need to know the shear strength of an 48" RCP pipe buried 12 feet to invert in what i believe is saturated soils. The pipe will be lined with CIPP. I know the Flex Modulus, Flex Strength and Tensile Strength of the liner.
Richard A...
I have a new calculator that compares a few different methods of rehabilitating buried pipe and gives me the Carbon footprint of each method. I understand that there is a market for the carbon offsets but don't have a clue where to find info on this.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
Does anyone know where that table of the volume of leaks at diff. pressures and hole sies. I thought it was in an EPA report.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
Here isa simple problem I cannot get my head around. I hav100 ft. of 2 inch fire hose. Pressure at the hydrant is 60 psi static. What will I get for a flow rate for this hose? Hose is open to atmosphere. Ia sure I have done this in the past but I feel am missng something
Richard A. Cornelius...
I need a PA reistered PE to do some peer review of CIPP calcs. I'm registered in MN, VA, MD and NC. But we have a job in Lehigh County that needs a PA PE to check designs.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
I need help. I have a table for arch pipe to round equivalent pipes.What i need is a formula for the area of the arch pipe.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
