Direct shear tests on geosynthetic-encased granular columns

被引：73
|
作者：
Mohapatra, Sunil Ranjan [1 ]
Rajagopal, K. [1 ]
Sharma, Jitendra [2 ]
机构：
[1] Indian Inst Technol Madras, Dept Civil Engn, Madras 600036, Tamil Nadu, India
[2] York Univ, Dept Civil Engn, Toronto, ON M3J 1P3, Canada
来源：
GEOTEXTILES AND GEOMEMBRANES | 2016年 / 44卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Geosynthetics; Granular column; Geosynthetic encasement; Soft clay; Lateral loading; Direct shear tests; STONE COLUMNS; MODEL TESTS; BEHAVIOR;
D O I：
10.1016/j.geotexmem.2016.01.002
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The behaviour of geosynthetic-encased granular columns (EGC) under vertical loads is reasonably well understood. To date, very little research has been done to understand the behaviour of EGCs subjected to lateral loads. The main objective of this paper is to quantify the effect of encasement on the lateral load capacity of EGCs. Several direct shear tests are performed on granular columns with and without encasement in a shear box having plan dimensions of 305 x 305 mm. Tests are conducted at different normal pressures varying from 15 kPa to 75 kPa. Two different diameters of columns, three types of encasements and three different plan configurations are studied in this research work. The results from these tests are discussed in terms of the increase in the shear strength due to geosynthetic encasement and the strength envelopes for understanding the influence of the encasement. Different types of failures observed in the granular columns (with and without encasement) subjected to lateral load are also discussed. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：396 / 405
页数：10
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