Overview
ISO/TR 10465-3:2007 provides supplementary guidance for the underground installation of flexible glass‑reinforced pipes based on unsaturated polyester resin (GRP‑UP). Published as Part 3 of the ISO 10465 series, this technical report focuses on installation parameters and application limits, especially when using an ATV‑A 127 type design system. Annexes include explanations of long‑term safety factors and informative data for practical pipe‑soil interaction calculations.
Key topics
The report addresses technical topics essential for reliable GRP‑UP design and installation:
- Parameters for deflection calculations - initial and long‑term deflection methods when using ATV‑A 127 type systems.
- Soil parameters and strain coefficients - guidance on soil deformation moduli, shape factors and coefficients used in flexural‑strain calculations.
- Buckling and stability - influence of soil modulus and pipe stiffness on elastic and long‑term buckling under external loads and negative internal pressure.
- Rerounding and combined loading - parameters for pipe rerounding and combined effects of internal pressure with external bending loads.
- Traffic and construction loads - assessment of traffic loads, their effect on allowable deflection and soil pressure contributions.
- Influence of temporary sheeting - how construction sheeting affects pipe loading and design assumptions.
- Safety factors - discussion of gravity and pressure pipe safety factors, including probabilistic rationale found in Annex G.
- Informative annexes covering soil parameters, concentration/loading coefficients, bedding correction factors, and application limits for GRP pressure pipes installed underground.
Practical applications
ISO/TR 10465-3:2007 is used to support safe, durable underground installations of GRP‑UP systems. Typical applications include:
- Design verification and static calculations for buried GRP pressure and gravity pipes.
- Selection of installation parameters (backfill quality, compaction, bedding) to control deflection and buckling risk.
- Evaluating traffic loading effects for urban and roadway trench installations.
- Preparing technical specifications and installation procedures that reference ATV‑A 127 calculation methods.
Who should use this standard
- Civil and pipeline design engineers specifying GRP‑UP systems
- Geotechnical and structural engineers performing pipe‑soil interaction analyses
- Contractors and site supervisors responsible for pipe installation and compaction control
- Standards writers, procurement teams and asset owners specifying underground GRP pipe performance limits
Related standards
- ISO 10465‑1 - Installation procedures for GRP‑UP (Technical Specification)
- ISO 10465‑2 - Comparison of static calculation methods (Technical Report)
- ATV‑A 127 and AWWA M‑45 - primary calculation systems referenced for static design of buried GRP pipes
Keywords: ISO/TR 10465‑3:2007, GRP‑UP, glass‑reinforced pipes, underground installation, ATV‑A 127, deflection, buckling, soil parameters, installation parameters, safety factors.