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Effect of Shallow Trench Construction on Cast Iron Pipelines
This paper summarizes the results of three-dimensional finite element analyses to evaluate the strains and displacements sustained by 4, 6, and 8-in. (100, 150, and 200 mm)-diameter cast...

Influence of Depth-of-Cover on Pipe-Soil Interaction
A major research effort was undertaken to study the structural behavior of a natural gas pipeline under several critical service conditions. The program included a field test site near...

An Instrumented Soil-Pipe System: Automated Data Acquisition and Management
A 16-in. natural gas pipeline near Racine, Wisconsin, had been in service for some 30 years. In 1982 road widening operations on a line parallel with the pipe resulted in a heavily trafficked...

Clay Pipe Installation?Advances in Load Factors
This report presents an evaluation of traditional load factor values for clay pipe and the development of a new bedding system which gives a higher load factor. Tests demonstrate that...

Investigations into the Structural Performance of Clay Pipes
Over the past 8 years, the Clay Pipe Development Association (CPDA) has commissioned non-destructive physical testing of vitrified clay pipelines. The diameters of the pipes have varied...

Unique Installation Methods for Large Interceptor in Poor Soil Conditions
The construction of approximately 1. 5 miles of a major sewer interceptor in downtown Boston encountered some unique construction challenges. The entire route required dewatering during...

SPIDA: An Analysis and Design System for Buried Concrete Pipe
The paper presents a description of a new computerized direct design method for buried concrete pipe named SPIDA (Soil-Pipe Interaction Design and Analysis). Also the technical basis and...

Experiences in Concrete Pipeline Construction in Ontario 158-1985
The paper discusses the title subject in terms of concrete pipe fabrication methods and plants, pipe jointing and jointing materials, and construction experiences in the Province of Ontario,...

Simplified Stress and Deformation Analysis for Pipeline Construction
This paper discusses the strength and deformation behavior of flexible steel pipes during pipeline construction. Some possible simple and quick solutions to these special design and construction...

Longitudinal Prestressed Piping for District Heating
The design of recently installed hot water district heating systems in the United States is based on similar systems developed in Europe. Longitudinal prestressing is used in the design...

Modeling Failure Probability of Underground Pipes
Factors influencing the performance of underground gas pipes are identified through a literature search and contacts with several utility companies. These factors are categorized as (i),...

Stress-Intensification Factor and Flexibility Factor in Seismic Analysis of Continuous Buried Pipelines
The topics of intensified stresses and increased flexibility in pipe bends subjected to bending loads are discussed in this paper. Also discussed are dynamic strain compatibility between...

A Practical Approach to Selection of Waterline Materials for Use in Expansive Soils
The authors previously investigated the performance of asbestos-cement, polyvinyl chloride and ductile iron pipe in the expansive soil environment. Expansive soil forces on the pipe were...

Bending Moment of Underground Flexible Pipes in a Centrifuge
The effect of several factors on bending moment of an underground flexible pipe section buried in a ditch with sheet piling was investigated experimentally by means of centrifugal model...

Field Burial Tests of Corrugated Double Wall PVC Pipe
A new lightweight PVC pipe, consisting of a smooth inner wall and a corrugated outer wall, has been introduced in the U. S. sanitary sewer market in 4 through 10 in. diameters. Field burial...

Dynamics of Buried Pipelines
Forced motion of pipelines due to stationary or moving loads is studied. The pipe is modeled as an elastic shell in an elastic (or viscoelastic) medium. The interaction of the shell and...

Determining the In-Place Density of Soils Using the Sleeve Method
The sleeve method of determining the in-place density was developed by Bureau of Reclamation field personnel for cohesionless, fine, gravel soils used for pipe bedding when other methods...

Numerical Simulation of Soil-Pipeline Interaction in a Ground Subsidence Zone
In this paper, the flexural interaction between a buried pipeline and the surrounding soil is examined by employing a combined boundary element-finite element scheme. The flexural interaction...

Earth Pressure and Surface Load Effects on Buried Pipelines
Rational techniques for analyzing earth pressure and surface load effects, based on finite element analysis methods, have been developed and applied extensively to the design of buried...

Dynamic Responses of Buried Pipelines
The dynamic responses of the pipelines are analyzed by the continuous mass matrix method by considering the soil as a bounded plane in which the pipeline is placed. The friction between...

 

 

 

 

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