Abstract
An experiment on the behavior of two types of circular reinforced concrete pipes under three-edge-bearing test is analyzed and discussed. Current study compares the strength of spigot-pocket (SPP) and ogee joint pipes (OJP). In the experimental analyses thirty-two pipes, nominal diameter 800 and 1200 mm, divided into two series of 16 pipes each, were tested. Each series was composed of 12 spigot-pocket pipes (SPP) and 4 ogee joint pipes (OJP). Experimental results of the loading versus displacement curves indicated that pipes behave similarly to a circular ring, since the OJP presented maximum loads 12 and 4% higher than those obtained for SPP respectively for nominal diameters 800 and 1200 mm. Pocket influenced load cracking, with 6.4 and 33% higher for SPP when compared to OJP for nominal diameters 800 and 1200 mm, respectively. Further, the presence of the pocket increased the pipe´s stiffness.
Highlights
Buried reinforced concrete pipes are used worldwide as the main alternative for basic sanitation
Simple circular reinforcement is usually employed in the design of circular reinforced concrete pipes with less than 1000 mm of nominal diameter, whereas double circular reinforcement is used for diameters greater than 800 mm
Twelve pipes had the pocket and the remaining four pipes were produced without the pocket, SPP and ogee joint pipes (OJP), respectively
Summary
Buried reinforced concrete pipes are used worldwide as the main alternative for basic sanitation. Since this type of construction is not visible peoples eyes, it generally receives less attention than other structures. Reinforced concrete pipes should have the same attention, perhaps an even greater one than that given to the structure project (El Debs, 2003). Marston-Spangler’s procedure on the design of buried pipes is usually employed (Zaidler, 1983). This procedure involves determining the resultant of vertical operating loads on the pipe by using an equivalence factor that correlates the behavior of the pipe in the field and in standard test situations. It is important to emphasize that the failure of a pipe may cause serious and costly problems, even though without any fatal victims
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
