Trenchless Technology

JAN 2019

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USE OF SPRAY APPLIED PIPE LININGS (SAPLS) AS A STRUCTURAL RENEWAL FOR GRAVITY STORM WATER CONVEYANCE CONDUITS The primary objective of this two-year research project that commenced in December 2017 is to develop design equations for structural renewal of gravity storm water conveyance culverts using spray applied pipe linings for both cementitious and resin- based materials and for circular and non-circular (NC) shapes. Design equations developed with this project will use loading as detailed in the AASHTO's Load and Resistance Factor Design (LRFD) Bridge Design Specifications and will be applicable for round and pipe arch shapes. All parameters of the host culvert that may impact the design thickness such as vertical or horizontal deflections, unsymmetrical racking, section loss, cracks, material geometry (corrugations), or protrusions such as bolts and flanges will be considered. Additionally, practical limitations on the use of these design equations will be included. The methodology for this research and the status of each item include: • Literature search to minimize amount of laboratory testing and field inspections- Completed • Survey of U.S. DOTs and Canadian agencies- Completed • A database of previous projects and experiences of participating DOTs with SAPLs- Completed • Field data inspections of in-situ SAPL installations at participating DOTs- Completed • Review of CIPP ASTM F1216 design equations- Active • Soil box testing to develop and validate structural design equations with circular and pipe arch shapes with resin and cementitious SAPL materials at various thicknesses- Active • Determine if metal pipe corrugations need to be complete filled with SAPL material (as claimed by some SAPL vendors) - Completed • Life cycle cost analysis -Anticipated • Finite element computational modeling-Anticipated • Development of a performance-based construction specification-Anticipated C U I R E C E N T E R F O R U N D E R G R O U N D I N F R A S T R U C T U R E R E S E A R C H A N D E D U C AT I O N C U R R E N T L Y @ VOLUME 12, NO. 1 JANUARY 2019 2019 CUIRE Board Members CUIRE BOARD Abu Abraham, P.E. Technical Manager Insituform Technologies Robert A. Carpenter Editor, Underground Construction Magazine Walter Chiang, P.E. Founder & Director CP&Y Inc. George H. Davis, R.G. Geotechnical Liaison Missouri Department of Transportation Bruce Hollands Uni-Bell PVC Pipe Association Aaron Houming Ni Asoe Hose Manufacturing Inc. Julia J. Hunt, P.E. Assistant Regional Manager/Operations Trinity River Authority of Texas Bruce Jameson Regional Manager Ace Pipe Cleaning, Inc. Therese R. Kline, P.E. Flexible Pipe Specialist Special Structures, Bridge Design Michigan Department of Transportation David Marshall, P.E. Director of Engineering and Operations Support Tarrant Regional Water District Lynn Osborn, P.E. Technical Advisor, NASSCO LEO Consulting, LLC Camille George Rubeiz, P.E. Director of Engineering Plastic Pipe Institute Jim Rush Editor Benjamin Media Inc. (Trenchless Technology) Larry Slavin, Ph.D. Principal Outside Plant Consulting Services, Inc. Harvey Svetlik Consultant Georg Fischer Central Plastics, LLC GF Piping Systems Richard Williammee Jr., P.E. District Materials Engineer Fort Worth District Texas Department of Transportation CUIRE Ph.D. students working on the SAPL project.

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