Combination of thrust block and restraint thrust system
Combination of thrust block and restraint thrust system
(OP)
thread164-292032: Why both restraints and thrust blocks?: Why both restraints and thrust blocks?
Reference to the previous thread and subsequent discussions regarding concrete thrust blocks with thrust restraint design and the inputs from waterpipe, I am interested in knowing about the design details related to using a combination of thrust blocks and restrained joint system, as mentioned in Unified Approach to Thrust Restraint Design, JOURNAL OF TRANSPORTATION ENGINEERING, ASCE / JANUARY 2007.
The piping system we are constructing is Ductile Iron push on type. we have separate designs for thrust blocks and restraint design but it would be interesting to know how a combination of these both can be utilized.
RE: Combination of thrust block and restraint thrust system
I would think on vertical bends (especially on larger mains) both restraints and thrust block would be utilized for that extra "confidence" as well.
RE: Combination of thrust block and restraint thrust system
Thrust blocks are no longer considered to be good piping practice. This is because thrust blocks are normally paired with undetermined soil properties and poor construction techniques. These uncertainties lead to unknown performance parameters for the piping system.
The reasons for not using thrust blocks are explained here:
https://daviddkent.wordpress.com/2013/01/22/thrust...
The use of mechanical restrained joints instead of thrust blocks would provide an easier, more predictable and safer installation.