Strain-Based Design of a Large-Diameter Steel Water Pipeline Crossing Ground Settlement Areas

2021 ◽  
Author(s):  
Gregory C. Sarvanis ◽  
Spyros A. Karamanos ◽  
Brent D. Keil ◽  
Richard D. Mielke
Keyword(s):  
Large Diameter ◽  
Ground Settlement ◽  
Water Pipeline ◽  
Pipeline Crossing ◽  
Settlement Areas

Case Study: Mardi Gras Deep Water Transportation System GIS and Underwater Inspections

2006 ◽  
Author(s):  
W. Leith McDonald ◽  
Gordon Gin ◽  
Rachel Boyle
Keyword(s):  
Deep Water ◽  
New Technology ◽  
Large Diameter ◽  
Transportation System ◽  
Pipeline System ◽  
Management Tools ◽  
Mardi Gras ◽  
Water Transportation ◽  
Water Pipeline

This paper presents a case study of BP’s Mardi Gras Gulf of Mexico deep water pipeline transportation system. The Mardi Gras Transportation System (MGTS), operated by BP Pipelines, N.A. has set the standard for large diameter, deepwater pipeline design, construction and maintenance. The pipelines range in size from NPS 16 to NPS 30 in water depths up to 7,300 ft. The paper showcases the ArcGIS and PODS relational database management tools and the process of how we implemented programs to track underwater facility features and their displacements caused by the 2005 hurricane season. We will describe the challenges, solutions and new technology used to monitor and maintain the integrity of this pipeline system, even when covered by 5000 feet or more of water. Submarine (ROV) inspection technology, digital video and GPS are the order of the day. We shall demonstrate how GIS can assist in managing and reporting the results of the inspections and setup a database for long term managment of the pipeline system.

Analysis of Full-Featured Pump Curve to Study the Impact of Large Diameter, Long Distance and High-Lift Water Pipeline

2011 ◽  
Vol 90-93 ◽  
pp. 2954-2959
Author(s):  
Yu Si Yang ◽  
Li Liu ◽  
Kun Li
Keyword(s):  
Water Supply ◽  
Large Diameter ◽  
Water Hammer ◽  
Urban Water Supply ◽  
Long Distance ◽  
High Lift ◽  
Pumping Stations ◽  
Water Pipelines ◽  
Water Pipeline ◽  
The Impact

According to the situation of Chinese urban water supply, this article has analyszed the possibility and computing method for water hammer that caused by pump stop in large diameter and high-lift water pipelines. In addition the impact of Full-featured Pump Curve on the water hammer calculation are also discussed. Finally, using the water hammer calculation of the primary pumping stations within a water-supply project which located in northeast China as an example, we had made corresponding conclusion.

Removal of Water or Solids in Oil/Water, Gas/Solid and Gas/Liquid/Solid Pipelines Using Compact Inline Separator

2004 ◽  
Author(s):  
Parimal P. More ◽  
Cheolho Kang ◽  
William Paul Jepson
Keyword(s):  
Oil And Gas ◽  
Large Diameter ◽  
Cost Effective ◽  
Two Phase ◽  
Stage Separation ◽  
Three Phase ◽  
Scale Test ◽  
Oil Water ◽  
Water Pipeline ◽  
Water Gas

Traditionally separators that are used for separation purposes in oil and gas industries are often bulky in size and incur high operating costs. Latest research has led to the development of a novel and compact inline separator, which is even cost effective. This paper exhibits the efficiency of the inline separator determined for two-phase and three-phase separation in multiphase pipelines. Laboratory tests were carried out to remove sand and water using large diameter, industrial-scale test facilities. For the removal of water in oil/water pipeline, separation tests were carried out with liquid velocities ranging from 0.5 ∼ 2 m/s with 10, 50 and 90% water cuts. At first stage, effectiveness in excess of 90% was attained in each of the water cuts. In second stage separation, an effectiveness of 95% was achieved. For the removal of sand in sand/gas pipeline, gas velocities varying from 4 to 14 m/s were investigated. Here, the amount of sand collected after the separation was 99.9% of the total volume inserted into the system before separation. Separation tests for three phases, gas/liquid/sand were also carried out with string of superficial gas velocities of 4 to 10 m/s and superficial liquid velocities of 0.5 to 1.5 m/s. In this case, effectiveness of around 99% was obtained. Thus it can be concluded that the innovative, inline separation system can effectively remove sand and water and reduces or eliminates the risk of corrosion/erosion problems.

scholarly journals Ground Stability Analysis in Non-Open-Cut Tunneling Method Using Small-Diameter Steel Pipe Piles

2020 ◽  
Vol 10 (19) ◽  
pp. 6906
Author(s):  
Jonguk Kim ◽  
Jung-joo Kim ◽  
Hafeezur Rehman ◽  
Hankyu Yoo
Keyword(s):  
Large Diameter ◽  
Small Diameter ◽  
Steel Pipe ◽  
Tunnel Construction ◽  
Ground Settlement ◽  
Cover Depth ◽  
Cut Method ◽  
Tunnel Size ◽  
Ground Stability ◽  
Stage 1

The non-open-cut method is used for constructing tunnels under existing roads without blocking traffic. Various non-open-cut methods use pipe roofs made of medium- and large-diameter steel pipe piles. However, the risk of ground settlement or heave is involved during the application of such piles. Therefore, research is conducted through model tests and numerical analysis on the non-open-cut method to investigate these problems using small-diameter piles. The progress of tunnel construction is divided into two repetitive steps. The first step (Stage 1) involves pulling back the pressure panel, and the second step involves propelling the precast structure (Stage 2). The behaviors of the pipe piles and ground displacement are analyzed according to the cover depth, tunnel size, existence and nonexistence of the shoe structure, and progress of tunnel construction. Small-diameter piles reduce the displacement during both stages. With a decrease in cover depth, the stress acting on the pile decreases during Stage 1 and increases during Stage 2. The presence of the shoe structure reduces the stress on the pile during both stages. The ground behavior based on the construction progress indicates that the ground settlement increases during Stage 1; however, no correlation is observed during Stage 2 at low depth.

Lessons Learned from Failure of a Large Diameter Water Pipeline

2008 ◽  
Author(s):  
Russell Gibson ◽  
Robert Allen ◽  
Steve Wilson ◽  
Wayne Brunzell
Keyword(s):  
Large Diameter ◽  
Lessons Learned ◽  
Water Pipeline

Research on Aseismatic Measures of Gas Pipeline Crossing a Fault for Strain-Based Design

2009 ◽  
Author(s):  
Xiaoting Gu ◽  
Hong Zhang
Keyword(s):  
Design Method ◽  
Large Diameter ◽  
Strain Analysis ◽  
Gas Pipeline ◽  
Analysis Model ◽  
Buried Pipe ◽  
Size And Shape ◽  
Buried Gas Pipeline ◽  
Pipeline Design ◽  
Pipeline Crossing

There are a lot of researches on qualitative aseismatic measures for buried gas pipeline crossing movable faults. But a few of them are quantitative, especially in the size and shape of the trench. In this paper, based on strain-based pipeline design method and finite element method, a new strain analysis model for buried large diameter gas pipeline is presented that deals quantitatively with the pipeline strain influencing factors, such as the size and shape of the trench, buried pipe depth, crossing angle between pipeline and fault, pipe diameter and wall thickness, mechanical properties of original soil and back fill soil, inner pipeline pressure. In this model, the pipeline is simulated by pipe element and elbow element, soil-pipe interaction is reduced to 3 dimensional soil spring. By means of FEM software ABAQUS, detail analysis is performed for a real design case of pipeline crossing a movable fault in the second west-east gas pipeline project of China, and optimized pipeline crossing fault scheme is proposed which can minimize the pipeline strain and limit it in allowable value.

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