Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

The cylindrical ground anchors has gained wide acceptance as an economical and highly versatile anchoring method over the past decade, particularly due to fast and simple performance by using the soil/rock boring and grouting procedure. However, these cylindrical anchors reach very low bearing capacities when they are performed in such a soil as a clay, silt or sand. The paper is concerning with the set of data and results which are collected after the in situ investigations of some 30 short vertical anchors installed in clay and in silty sand, as well. The bearing capacity of cylindrical and spherical anchors were also compared. Spherical cavity at the bottom of the borehole was produced by controlled point blasting effect, which was studied in the first place. Finally, the proper analytical method for estimation of the ultimate uplift capacity was established, based on a very useful hypothesis of Vesie (1965) and some his later works, Vesie (1971). This model has showed a good agreement with field test pullout results.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Ground Anchor Bearing Capacity Improvement by Blasting in Bore-Hole

St. Louis, Missouri

The cylindrical ground anchors has gained wide acceptance as an economical and highly versatile anchoring method over the past decade, particularly due to fast and simple performance by using the soil/rock boring and grouting procedure. However, these cylindrical anchors reach very low bearing capacities when they are performed in such a soil as a clay, silt or sand. The paper is concerning with the set of data and results which are collected after the in situ investigations of some 30 short vertical anchors installed in clay and in silty sand, as well. The bearing capacity of cylindrical and spherical anchors were also compared. Spherical cavity at the bottom of the borehole was produced by controlled point blasting effect, which was studied in the first place. Finally, the proper analytical method for estimation of the ultimate uplift capacity was established, based on a very useful hypothesis of Vesie (1965) and some his later works, Vesie (1971). This model has showed a good agreement with field test pullout results.