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

页码：376 / 388

页数：13

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