Alternative Title

Paper No. 7.27

Location

St. Louis, Missouri

Session Start Date

3-8-1998

Session End Date

3-15-1998

Abstract

A three year research project was sponsored by the Transportation Research Board (TRB) in 1991 to determine the best materials and methods for sealing small diameter geotechnical exploratory holes. A key requirement of the research project was to verity the effectiveness of the in-place seals. Seal verification studies were conducted at two sites, one in the USA and one in Canada. Seals consisting of various bentonite products and Portland cement were installed and allowed to age. Periodic in situ hydraulic conductivity tests were performed at the Canadian site. Seal exhumation studies were conducted at the USA site. Upon completion of the research in 1994-5, hole sealing guidelines were published by the National Cooperative Highway Research Program (NCHRP). This paper provides an overview of the research project and describes the hole sealing guidelines.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-8-1998

Document Version

Final Version

Rights

© 1998 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Guidelines for Sealing Geotechnical Exploratory Holes

St. Louis, Missouri

A three year research project was sponsored by the Transportation Research Board (TRB) in 1991 to determine the best materials and methods for sealing small diameter geotechnical exploratory holes. A key requirement of the research project was to verity the effectiveness of the in-place seals. Seal verification studies were conducted at two sites, one in the USA and one in Canada. Seals consisting of various bentonite products and Portland cement were installed and allowed to age. Periodic in situ hydraulic conductivity tests were performed at the Canadian site. Seal exhumation studies were conducted at the USA site. Upon completion of the research in 1994-5, hole sealing guidelines were published by the National Cooperative Highway Research Program (NCHRP). This paper provides an overview of the research project and describes the hole sealing guidelines.