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Design and Installation of Buried Pipes

1.4 CEUs | Monday–Tuesday, September 23–24

Instructors

Jesse L. Beaver, P.E., M.ASCE
Amster K. Howard, Jr., M.ASCE

"This was a great seminar! The instructors are very knowledgeable and excellent sources of information."
—Mark Strahota, Project Engineer, Malcolm Pirnie, Irvine, CA

Purpose and Background

Designers often think of design and installation of buried pipe as two separate processes. In fact, since performance of buried pipe depends to a large degree upon good soil support, the two processes cannot be separated. Proper design procedures require the coordinated design of pipe and installation and subsequent construction procedures must fulfill design assumptions.

This seminar, conducted by two leading engineers in the field of buried pipe, demonstrates the fundamentals of pipe-soil interaction behavior, how soil and pipe behavior can be jointly considered in design and how proper construction methods can achieve design assumptions in the field. The principals of soil-structure interaction covered in this seminar apply to all types of pipe.

The primary objective of this seminar is to show how simultaneous consideration of pipe and soil, as two interrelated parts of one pipe-soil system, can optimize pipe performance and longevity, prevent failures, and minimize the high cost of downtime and repairs.

Day one concentrates on pipe materials, pipe-soil interaction, and pipe design procedures, with emphasis on soil behaviors as design criteria. Topics include loads on pipe, deflection calculations, soil stiffness (E' and Ms), trench width effects, how to evaluate in situ soil stiffness, and how to consider time dependent behavior of plastic pipe. Design methods are presented for most types of pipe, emphasizing conditions in which the same design method may be used for all pipe materials. Applicability of computer methods available for pipe design (CANDE, SIDD, PIPECAR) is also discussed. Day one focuses on design methods, principally on gravity flow pipe (reinforced concrete, clay, corrugated metal, and all types of plastic pipe), but many aspects of pressure pipe, such as thrust restraint, are also presented.

Day two focuses on pipe installation. From unloading the pipe at the site of installation to final testing for acceptance, each step in the construction sequence is reviewed in detail. Correct selection and compaction of the soil support system, for both rigid and flexible pipe, is discussed, along with testing requirements and correct standards. Soil classification system and soil properties, as related to pipe-soil interaction, are reviewed. Efficient mix design, construction techniques, and test procedures for flowable fill will be covered. Case histories and photos from actual construction sites will illustrate the necessity of pre-construction investigations, proper construction, safety programs, and inspection.

Seminar Benefits

  • Learn about the latest changes in pipe specifications and why they are being made
  • Learn from case histories what can go wrong in pipeline construction and the consequences of not following good practice
  • Understand how to design installations that minimize risk
  • Learn how uncompacted bedding can help pipe performance
  • Understand the correlation between soil density, which is measured in the field, and soil stiffness, the soil property that affects pipe performance
  • Identify the best in-place density tests for different soil conditions
  • Find out when and how to use flowable fill (controlled density fill) for pipe embedment and backfill
  • Learn approximate and sophisticated methods for predicting deflection of flexible pipe
  • Get maximum benefit from ASCE Standard 15-93 for design and manufacture of reinforced concrete pipe and other ASCE standards for reinforced concrete pipe and box sections
  • Understand the relationship between pipe and soil and know how to apply this information in your own work to build durable, efficient pipelines which yield substantial short and long term savings for you, your organization, and your clients

Learning Outcomes

  • Understand how pipe performance depends on soil type and density
  • Comprehend the latest advances in pipe design and installation
  • Know the principles of proper pipeline design and installation

Assessment of Learning Outcomes

Achievements of the learning outcomes will be assessed by working examples and doing exercises to identify both proper and improper design and installation methods.

Special Features

Each seminar attendee will receive the book Pipeline Installation 2.0 by Amster Howard

Who Should Attend?

  • Design Engineers
  • Project Managers
  • Construction Foremen
  • Public Works Engineers
  • Construction Managers
  • Soil Testing Personnel
  • Pipeline Owners
  • Contractors
  • Specification Writers
  • Construction Inspectors
  • Anyone else involved in pipe design and construction

Seminar Outline

Day 1

8:30 a.m. - 5:00 p.m. with a 1 hour lunch break

  • Pipe Materials and Design (Jesse L. Beaver)
  • Soil Properties
  • Loads
  • Elasticity Design Methods
  • Iowa Deflection Formula
  • Ring Compression Theory
  • Finite Element Analysis
  • Universal Design Concept
  • Analysis and Design of Flexible Pipe
  • Analysis and Design of Rigid Pipe (including ASCE 15-93)
  • Design for Longitudinal Effects
  • Analysis for Buckling Capacity

Day 2

8:30 a.m. - 5:00 p.m. with a 1 hour lunch break

  • Pipe Installation (Amster Howard)
  • Fundamentals of Pipeline Installation
  • Shipping, Handling, & Storage
  • Inspection of Pipe Interiors
  • Trench Excavation
  • Foundation & Bedding
  • Laying & Joining
  • Appurtenances & Fittings
  • Embedment & Backfill
  • Soil Classification
  • Soil Properties
  • Compaction of Soil
  • Installation of Flowable Fill
  • Safety Concerns

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