Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

The case studies in this paper describe three retail warehouse sites in Taiwan that have high groundwater tables in common, but that have drastically different soil conditions. Two of the sites are in dense, permeable gravel and cobble and the third site is in interbedded alluvial sand and clay. At the first site, shallow footings and slab-on-grade floors were placed on top of a permanent passive drainage system that required accurate seepage volume estimates in the permeable gravel and cobble. At the second site, the hydraulic conductivity of the gravel and cobble is high and is sensitive to fluctuation of the regional groundwater table. A hybrid passive drainage and structural slab system minimizes pumping during the seasonal high groundwater table. At the third site, deep slurry walls constructed around the building cut off groundwater seepage, and permanent pumping wells within the building footprint lower the groundwater table. This system also eliminated the risk of soil liquefaction and allowed shallow footings and slab-on-grade floors to be used. This paper discusses the hydrogeological analysis of the three sites and the geotechnical design considerations for the dewatering and foundation systems, as well as soil liquefaction mitigation.

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 4th, 12:00 AM

Case Studies of Dewatering and Foundation Design: Retail Warehouses in Taiwan

Chicago, Illinois

The case studies in this paper describe three retail warehouse sites in Taiwan that have high groundwater tables in common, but that have drastically different soil conditions. Two of the sites are in dense, permeable gravel and cobble and the third site is in interbedded alluvial sand and clay. At the first site, shallow footings and slab-on-grade floors were placed on top of a permanent passive drainage system that required accurate seepage volume estimates in the permeable gravel and cobble. At the second site, the hydraulic conductivity of the gravel and cobble is high and is sensitive to fluctuation of the regional groundwater table. A hybrid passive drainage and structural slab system minimizes pumping during the seasonal high groundwater table. At the third site, deep slurry walls constructed around the building cut off groundwater seepage, and permanent pumping wells within the building footprint lower the groundwater table. This system also eliminated the risk of soil liquefaction and allowed shallow footings and slab-on-grade floors to be used. This paper discusses the hydrogeological analysis of the three sites and the geotechnical design considerations for the dewatering and foundation systems, as well as soil liquefaction mitigation.