Influence of subgrade strength on the performance of geocell-reinforced foundation systems

被引：53
作者：
Biswas, A. [1 ]
Krishna, A. Murali [1 ]
Dash, S. K. [2 ]
机构：
[1] Indian Inst Technol Guwahati, Dept Civil Engn, Gauhati 781039, India
[2] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India
来源：
GEOSYNTHETICS INTERNATIONAL | 2013年 / 20卷 / 06期
关键词：
Geosynthetics; Geocell reinforcement; Foundation; Subgrade strength; Bearing capacity improvement; Footing settlement; BEARING-CAPACITY; SAND BEDS; BEHAVIOR; SOIL; EMBANKMENTS; DESIGN; TESTS; MODEL;
D O I：
10.1680/gein.13.00025
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Physical model tests were performed on geocell-reinforced foundation systems with circular footings to study the influence of the strength of the subgrade layer. Model tests were conducted with a 150 mm diameter circular footing supported on foundation beds with varied configurations. Three different series of tests were conducted using a clay subgrade with undrained cohesion in the range of 7-60 kPa and dense sand at 80% of relative density. The results showed that the performance of the geocell-reinforced foundation systems was highly dependent on the subgrade strength. A maximum improvement factor of about 11.6 was observed for very soft subgrade with c(u) = 7 kPa, which decreased to about 3 for stiffer subgrade having c(u) = 30 kPa under similar test conditions and configuration. In addition, the variation of bearing capacity improvement factors was observed to be significantly influenced by footing settlement and geocell height.
引用
收藏
页码：376 / 388
页数：13
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