Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
(OP)
I have a specification to design a liner for non-circular gravity flow pipe using the beam method. There is no reference to any ASTM or other standard regarding the beam method. Any information on this method would greatly be appreciated.





RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
ASTM D 2344 Apparent Horizontal Shear Strength of Reinforced Plastics by Short Beam Method
http://ww
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Dick, the existing spec calls for liner thickness for round pipe to be provided by use of ASTM F1216 and for non-circular pipe to be provided by the beam method. The contractor will submit his liner thickness, telling me what thickness is needed. Before I hold him to providing the thickness, calculated by the beam method, I want to be sure I have an understanding of the method and a resource for it, should he request it.
Nice catch on the "Cast" instead of "Cured". I think I was in holiday mode a little early, plus I have two CIP concrete projects in progress.
My in-company experts are back from vacation and are looking into this. I'm still open for suggestions.
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Height 42.8 inches 1070 mm
Width 64 inches 1600 mm
Assumed Thickness (t') 1.8 inches 45 mm
EffectiveLength (L) 60.400 inches 1510 mm
Ht of WT above invert (H) 5.7 m
Physical Properties
Modulus of Elasticity (Es) (Short term) 507614PSI 3500 MPa
Modulus of Elasticity (El) (Long term) 253807PSI 1750 MPa
R (0.5 for straight sides, 1 for curved) 1
Limiting Stress (Sl) 2901PSI 20 MPa
Design
H = 340Sl(t/L)² (Stress)
Rewriting
t = L (H / (340 Sl)) 0.5
t = 43.7 mm 1.721 inches
H = 236REl(t/L) 3 (Deflection)
Rewriting
t = L (H / (236 R El )) 0.333
36.2 mm 1.426 inches
Lining Thickness Required = 43.7 mm 1.721 inches
This will give you a good idea of the liner thickness. It is always thicker than the round equivalent pipe. But that is where i always start. Also, inthe formula there is no place for the live load or soil load. Convert them to feet of water and add to the hater head on the pipe. the liner gets thick in a hurry.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
I am under the impression that the old SRM was a three volume set. Has it merged into one volume at the 4th edition? Does the new "Sewerage Risk Management" manual include the information from the old "Sewerage Rehabilitation Manual"?
Thanks.
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
ASTM D790 - 07e1 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
1. Scope
1.1 These test methods cover the determination of flexural properties of unreinforced and reinforced plastics, including high-modulus composites and electrical insulating materials in the form of rectangular bars molded directly or cut from sheets, plates, or molded shapes. These test methods are generally applicable to both rigid and semirigid materials. However, flexural strength cannot be determined for those materials that do not break or that do not fail in the outer surface of the test specimen within the 5.0 % strain limit of these test methods. These test methods utilize a three-point loading system applied to a simply supported beam. A four-point loading system method can be found in Test Method D 6272.
ASTM F1216 - 09
ASTM F1216 - 09 Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
crown bending moment is in error by a factor of two."
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"The German code ATV-M 127-2 published in 2000 for the design of linings to rehabilitate sewers has proved as a helpful guideline to find the optimum wall thickness of any liner material, e.g. CIPP and stainless steel manchettes. Much rehabilitation work in different European countries has been performed successfully using the code."
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http://www.nodigshow.com/2008/TrackOne.html
RE: Cast-in-place-pipe for an "egg" sewer. (U.S.A.)
Richard A. Cornelius, P.E.
WWW.amlinereast.com