Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

Mat foundations constructed in impermeable soils with a high groundwater table will experience a substantially high buoyancy force due to hydrostatic pressure. Conventional solutions to this problem are to increase the structural weight or install piles or anchors to counterbalance the uplift. These methods are costly, inefficient, and time-consuming. This paper presents a case study to show an innovated approach by using geocomposites to cope with the uplift in impermeable soils. Uplift pressure relief system consisted of geosynthetic materials was installed for a 14- story office and apartment building. The raft foundation was built at 50 feet below ground surface. A field monitoring and evaluation program has been implemented. Based on site experiences, this system proved to be rapid, simple, and cost effective for construction. Observations made to date about settlement, seepage, and porewater pressure have shown good performance of this system. The introduction of geocomposites to relieve uplift pressure appears to be practical as a rational solution for this type of foundation problem.

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

Share

 
COinS
 
Jun 1st, 12:00 AM

Geocomposites for Foundation Uplift Pressure Control in Impermeable Soils

St. Louis, Missouri

Mat foundations constructed in impermeable soils with a high groundwater table will experience a substantially high buoyancy force due to hydrostatic pressure. Conventional solutions to this problem are to increase the structural weight or install piles or anchors to counterbalance the uplift. These methods are costly, inefficient, and time-consuming. This paper presents a case study to show an innovated approach by using geocomposites to cope with the uplift in impermeable soils. Uplift pressure relief system consisted of geosynthetic materials was installed for a 14- story office and apartment building. The raft foundation was built at 50 feet below ground surface. A field monitoring and evaluation program has been implemented. Based on site experiences, this system proved to be rapid, simple, and cost effective for construction. Observations made to date about settlement, seepage, and porewater pressure have shown good performance of this system. The introduction of geocomposites to relieve uplift pressure appears to be practical as a rational solution for this type of foundation problem.