Building on fill: collapse compression on inundation

Document Status

Current

Supplement

Core Supplement

Series

Information Paper

Abstract

A substantial proportion of low-rise construction in Britain is on filled ground and problems due to settlement of the fill have occurred. Most poorly compacted fills undergo a reduction in volume when inundated or submerged for the first time, which if it happens after building construction can cause serious damage. This phenomenon, usually termed collapse compressions, is often the most serious hazard for buildings on fill. The increase in moisture content of the fill which triggers collapse compression can be caused either by downward infiltration of surface water or by a rising ground water level. Where non-engineered fill is treated to improve its load-carrying properties, a primary objective should be to eliminate any significant collapse potential. Similarly, the specification and control procedures for placement and compaction of an engineered fill should aim to eliminate this type of volume change within the fill.

Author

Charles, J. A. and Watts, K. S.

ISBN

9781860811340

Subjects

• Building foundations/ground floors
• Groundwork/site investigation for buildings
• Building structure

Publisher History

BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.