Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-14-2013

Abstract

Jet grout columns are used widely in the last decade in Turkey especially in soil improvement projects. This study is intended to understand the behavior and stress distribution of jet grout columns installed in non-cohesive soils and are under vertical loads. Design capacity of jet grout column is examined by loading tests. Stress distribution was determined by strain gauges installed inside the jet grout columns. 35cm in diameter 8m long jet grout columns were constructed in silty sand. As measured by strain gages, the stress along the column extends deeper while load increases. According to the load test results, at the bottom of the column, 8% of the total test load was measured. Also the 60% of the total stress was observed at a depth of 3.5m to 4.5m below top of the jet grout columns. The loading test was modeled with a finite element program. 15m long jet grout columns was also modeled using a finite element program and it indicated about 60% of the total load occurred at a depth of 8.5m.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 29th, 12:00 AM May 14th, 12:00 AM

Observation of Stress Distribution on Instrumented Jet Grout Columns

Chicago, Illinois

Jet grout columns are used widely in the last decade in Turkey especially in soil improvement projects. This study is intended to understand the behavior and stress distribution of jet grout columns installed in non-cohesive soils and are under vertical loads. Design capacity of jet grout column is examined by loading tests. Stress distribution was determined by strain gauges installed inside the jet grout columns. 35cm in diameter 8m long jet grout columns were constructed in silty sand. As measured by strain gages, the stress along the column extends deeper while load increases. According to the load test results, at the bottom of the column, 8% of the total test load was measured. Also the 60% of the total stress was observed at a depth of 3.5m to 4.5m below top of the jet grout columns. The loading test was modeled with a finite element program. 15m long jet grout columns was also modeled using a finite element program and it indicated about 60% of the total load occurred at a depth of 8.5m.