Effects of long-term pre-loading on the performance of a footing on clay

被引：32
作者：
Lehane, BM [1 ]
Jardine, RJ
机构：
[1] Univ Western Australia, Dept Civil & Resource Engn, Perth, WA 6009, Australia
[2] Trinity Coll Dublin, Dublin, Ireland
[3] Univ London Imperial Coll Sci Technol & Med, Dept Civil Engn, London, England
来源：
GEOTECHNIQUE | 2003年 / 53卷 / 08期
关键词：
creep; case history; field instrumentation; footings/foundations;
D O I：
10.1680/geot.2003.53.8.689
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
An instrumented footing test in Bothkennar clay is described, which examines the effects of a long period of drained pre-loading on the footing's undrained bearing capacity. It is seen that pre-loading induced a significant increase in the subsequent foundation stiffness due to consolidation but also due to creep and ageing processes that led to an outward expansion of the clay's large-strain yield surface. Pre-loading also resulted in a downward shift of the bearing capacity mechanism and an ultimate bearing capacity that was substantially greater than that expected due to consolidation effects alone. Evolving anisotropy and creep are identified as being important contributory factors to the enhanced undrained capacity after pre-loading.
引用
收藏
页码：689 / 695
页数：7
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