grout pressure
grout pressure
(OP)
Looking for a reference for pressure drop for tremied concrete. Product is a minimally flowable sanded cement grout through a tremie pipe. Grout will flow from the pump through say 50 feet plus/minus of hose and then another 100 feet plus/minus of horizontal pipe and then into a cavity which needs to be completely filled. I am trying to estimate the pumping pressure required, maintaining minimal pressure in the cavity at the end of the tremie.





RE: grout pressure
RE: grout pressure
depth is not an issue, bulkhead design is questionable
depends on a lot of things including pumping rate, hose and pipe size, grout viscosity and density etc.
based on a lot of assumptions and little data, I am getting about 1 psi pressure drop per foot of 2 inch hose/pipe which is giving me a pumping pressure of about 150 psi. I know that I will need upwards of 20 psi to completely fill the cavity, so a total gage pressure at the pump of about 170 might do it. An air vent will help to limit pressure surges at 99% full. But so far, I have found little to no published data to base these calculations on. Placing the pressure gage at the bulkhead would be more useful than at the pump.
RE: grout pressure
The South African mining industry developed a number of designs for hydraulic plugs in the 1960/70s . This work was refined in the 1990s in Canada by Brennan Lang............his paper published in 1999, presented at the CIM conference in Calgary Alberta titled "Design and Construction of Tunnel Plugs and Bulkheads " may have some of the references you are seeking.
RE: grout pressure
RE: grout pressure
RE: grout pressure
RE: grout pressure
RE: grout pressure
RE: grout pressure
RE: grout pressure