Performance of buried pipe installation : tech summary.

Barbato, Michele; Louisiana Transportation Research Center

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Performance of buried pipe installation : tech summary.

2010-05-01
By Barbato, Michele

[PDF-174.34 KB]

English

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Details:

Alternative Title:

LTRC tech summary 467
Creators:

Barbato, Michele
Corporate Creators:

Louisiana Transportation Research Center
Subject/TRT Terms:

[+]

Culverts Pipelines Soil-structure Interaction--Louisiana Soils Soils By Properties Soil Structure Trenches Underground Pipelines--Design And Construction Underground Structures
Resource Type:

Tech Report
Geographical Coverage:

Louisiana
Edition:

LTRC Tech summary 467.
Corporate Publisher:

Louisiana Transportation Research Center
Abstract:

Existing codes and recommendations often require standard/minimum values for the bedding, backfi ll, and fi ll cover geometric and

mechanical properties in the installation of buried pipes under transportation facilities. These recommended values are often obtained

by considering the worst-case scenario for each component and account only in an approximate way for the soil-structure interaction

(SSI) between bedding, backfi ll, fi ll cover, and pipes of diff erent materials and mechanical properties. Performance in terms of

reliability and cost-eff ectiveness of the design is not fully addressed by current specifi cations. The need arises for revising the current

specifi cations to obtain a more effi cient design of the installation of buried pipes.

Current design methodologies for buried pipes are still based on the Marston theory for estimating vertical loads. This design method

is based on the assumption of an elastic, isotropic soil above and around the pipe. Such an approach has been deemed as overconservative,

given the simplifi cations associated with these inherent assumptions. In addition, the method does not consider the

eff ects of diff erent bedding materials and thicknesses, nor does it consider the eff ects of a very soft natural soil, which is commonly

encountered in Southern Louisiana.

The buried pipe installation considered in this project is a trench type with vertical walls, shallow cover, and a single pipe. The live

loads due to the vehicular traffi c produce signifi cant stresses on the pipe and the soil in the trench, with a stress distribution strongly

dependent on the specifi c geometric and mechanical properties of the entire soil-pipe system.
Format:

PDF
Funding:

State Project Number: 739-99-1520 ; LTRC Project Number: 08-6GT

State Project Number: 739-99-1520 ; LTRC Project Number: 08-6GT Less -
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:02b81162b718a00a9d569448f65c270775ea9fadcb3d767df78bc797af4428d2
Download URL:

https://rosap.ntl.bts.gov/view/dot/20493/dot_20493_DS1.pdf
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Performance of buried pipe installation : tech summary.

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