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Pipeline Integrity Management Under Geohazard Conditions (PIMG)
By
Mamdouh M. Salama
Mamdouh M. Salama
ConocoPhillips
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Yong-Yi Wang
Yong-Yi Wang
CRES
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Don West
Don West
Golder
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Alexander McKenzie-Johnson
Alexander McKenzie-Johnson
Geosyntec
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Azam B A-Rahman
Azam B A-Rahman
Petronas
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Guiyi Wu
Guiyi Wu
TWI
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Jens Petter Tronskar
Jens Petter Tronskar
DNVGL
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Jim Hart
Jim Hart
SSD Inc
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Bernt J. Leira
Bernt J. Leira
NTNU
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ISBN:
9780791861998
No. of Pages:
412
Publisher:
ASME Press
Publication date:
2020

Landslide-related ground movement may occur rapidly and without warning or may occur slowly over time. Both rates of movement, if engaging a buried pipeline, may result in increasing adverse strains to, and possible failure of the pipeline. To effectively manage both the near-term and long-term threat associated with landslide-related movement on pipeline systems, it is important to first identify and characterize the landslide threat, and then develop a mitigation and monitoring program to manage the risk associated with the threat. A landslide threat monitoring program, if tailored correctly for a given pipeline system, can be used to identify newly-developing landslides, as well as monitor movement of known or existing landslides. A monitoring program can also be used to confirm that there are no landslide threats present on a pipeline system that crosses landslide-susceptible terrain. This paper provides a high-level overview of current methods available for monitoring landslide ground movement to better understand potential threat to pipeline systems. The targeted audience includes pipeline owners and operators who are interested in understanding current and common methodologies for monitoring slope movement and pipe response, and how the available methods may assist them to manage the landslide-related risk. Landslide monitoring can generally be carried out in two different forms: (1) monitoring the ground itself, either at or below the surface, and (2) monitoring the pipe. Monitoring ground movement can be accomplished through direct visual observations (e.g., aerial or ground reconnaissance); remote sensing techniques using light detection and ranging (LiDAR) data, interferometric synthetic aperture radar (InSAR) data, or aerial imagery; and measurement of ground conditions through instrumentation such as geodetic survey monuments, slope inclinometers, and groundwater piezometers. Monitoring the pipe is commonly accomplished through use of strain gauges, ILI IMU bending strain data, orfiber optics. Selecting the most suitable form(s) of monitoring for a single landslide or an entire pipeline system depends on many factors, such as the characteristics of each landslide, the local geographic and geologic conditions, the density of landslide sites, site accessibility, the owner’s risk tolerance, etc. In addition, it is often beneficial or necessary to combine more than one type of monitoring at a single site, to fully understand and quantify the threat to the pipeline.

INTRODUCTION
1.0
Ground Movement Monitoring Methods
2.0
Monitoring Pipeline Movement
3.0
DISCUSSION
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