As someone who has redefined my role multiple times (all within the Civil Engineering field), and based on the post it looks like you do not have a definite preference, I would suggest you just start where you are offered a job. and if you do not like to trajectory (after giving it a decent...
My next question is:
If the Head graph shows the highpoint is above the head (ie negative head - red line) do we increase the pump head until we have positive preassure throughout the rising main (blue line) with the risk of dischargin to the manhole with a few meters of head (how much head at...
this is my worry, if the pump turns on again while the pipe section is draining (from the bottom) it will pump out slugs of compressed air that will "explode" into the discharge manhole and make a real mess.
the upstream end is open, however it would need to flow through the pumps and non return valves, and as the downstream drop after the high point is about 4.5m less than the upstream side i do not believe there is sufficient drop to create a siphon.
(the engineer in me still wants to know what...
discharging into a manhole with adequately sized gravity network piping - effectively discharging to atmosphere so air will be able to enter from the end of the pipe
With the maintenance required to ensure these remain permeable (and don't get clogged) i have seen an industry shift from permeable to soakage systems under car parks (collected through conventional catch pits)
I am reviewing a design of a ww rising main. The pipe is 150mm dia and the pumped flow is in the region of 30 l/s. total rising main is 885m
At the request of the client the discharge location is about 233m past the last high point and about 4.5m below this highpoint (this is the only high...
EPAnet will do just about everything you need. There are multiple youtube videos to help but it can be very frustrating untill you work out a good process to avoid getting errors and to avoid making mistakes.
I believe a lot of the paid software uses EPAnet as the engine for the calcs (this is...
most likely, probably find that water or power cables interfered with telecom lines, but now that it is all fiber there may be no impact at all. It is like the origins of narrow gauge railway.
Although it may have something to do with having to dig up services for maintenance, spacing them may...
our spec is 300mm horizontal clearance between water and communication cables (150mm vertical clearance when crossing services)
Most councils and service providers will provide this if asked, I say this as i have had some hiccups where the power supplier was upset we didn't put their duct...
the second last row shows water. It would be the same for a small dia water connection
If the OP was referring to clearance between multiple water laterals there is no prescribed clearance, however good engineering would have them spaced in a way to allow them to be accessed relatively easily...
because being topsoil it will have organics that will break down and ultimately the fill above will load the topsoil below and subside - is my thinking
i knew that was the answer, just hoping someone would come up with a cheaper one LOL
It is at minimum grade as well so not much room to accommodate settlement
I have a project where my 150mm dia (6 inch) PVC ww gravity pipe will go through a section of very thick topsoil (1m plus below the pipe invert).
My question is should i undercut the full 1m+ depth until i get to bottom of topsoil and fill the trench to pipe bedding or will i be ok if i...
I wrote this yesterday and accidentally closed the tab before sending it!
As mentioned previously the system should be designed with a boundary kit. This is a chamber that sits on the lot connection (or lateral from pump to common/council rising main) and is a requirement of LP sewer systems...
I have seen it work as a demo at a water conference, not sure what the real-life results are, but NZ is small and rainwater tanks are becoming a requirement on all new builds so imagine I would have heard if they didn't work. NZ is also highly regulated so there would definitely be first-flush...
this SW tank manufacturer has a novel anti-clogg system, but not sure if it can be scaled up to work for you. Possibly a smaller dwonstream weir that allows a tailwater to develop an provide backpressure on the orifice
https://www.promax.co.nz/TankGuard
i am not sure what the design standard is for your location, but all the LP sewer systems I have been involved in have a boundary kit . This includes a non-return valve so if the lot owner's pipe develops a leak they would be able to isolate their section of pipe (within their property) and...
