Load-settlement response of circular footing resting on reinforced layered system

Chennarapu, H and B, Umashankar (2015) Load-settlement response of circular footing resting on reinforced layered system. Japanese Geotechnical Society Special Publication, 2 (64). pp. 2170-2173. ISSN 2188-8027

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Removal of unsuitable soil and replacement with a strong material is one of the oldest and simplest ground improvement techniques. During this process, a layered soil system with a strong layer overlying a weak layer is achieved. Studies on the load-settlement response of footing on such layered system are limited. An experimental study is carried out to obtain the load-settlement response of a model circular footing resting on (a) unreinforced aggregate layer overlying a sandy soil layer, and (b) geogrid-reinforced aggregate layer overlying a sandy soil layer. A large-scale test chamber of size equal to 1m x 1m x 1m is used to perform the experiments. Actuator of 10T capacity is used to apply the loads in a displacement-rate controlled mode. A plate vibrator is used to prepare uniform sand and aggregate layers inside the test chamber. Relative density equal to 70% is maintained for both the layers during the entire test program. The improvement in the load carrying capacity of model footing with the increase in the thickness of aggregate layer and with the introduction of geogrid reinforcement in the aggregate layer is proposed in the study.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: Layered soil, aggregates, geogrid, circular footing
Subjects: Civil Engineering > Standards
Civil Engineering > Structural engineering and underground construction
Civil Engineering > Soil Structure Interaction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 08 Feb 2016 05:22
Last Modified: 01 Sep 2017 06:29
URI: http://raiith.iith.ac.in/id/eprint/2176
Publisher URL: https://doi.org/10.3208/jgssp.IND-17
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