Session 01: Case Histories of Unexpected Behavior and Failure of Shallow, Deep and Other Foundations
Study of Behaviour of Square and Rectangular Footings Resting on Cohesive Soils Based on Model Tests
Location
Arlington, Virginia
Date
13 Aug 2008, 5:15pm - 6:45pm
Abstract
The estimation of a reliable value of bearing Capacity of soil is the most important step in the foundation design work. Number of theoretical approaches and in-situ tests for the estimation of bearing capacity of footing are available. The reliability of any theory can be demonstrated by comparing the experimental test results on field footings with theoretical predictions. One of the reliable methods is the load test on full sized footing. However, this test as covered under IS 1888-1982 is too expensive and time consuming. Model tests can be conducted on footings of various sizes. The surface characteristics for different loading conditions can provide information on qualitative and quantitative contribution of such parameters on bearing of footings in absence of field test results. It is revealed that research work (Sawant et al (2000), Rajgopal et al (2000), Sawaf et al (2005), Mohmoud et al (1989), Harikrishna et al(2000), Sahu et al (1970) etc.)has been carried out for load tests on model footings resting on sand as foundation medium. However no work has been reported so far on c – Φ soil. In this present study a laboratory model with loading frame has been developed in Geotechnical Engineering Laboratory of College of Engineering, Pune to conduct small scale load tests, to determine Bearing capacity characteristics of footings resting on c-Φ soil. Load tests were conducted on two square, two circular and five rectangular footings resting on c – Φ soil in the laboratory model. The bearing capacity, time – settlement relationship, pressure settlement relationship of footing resting on c – Φ soil and effect of various parameters such as L/B ratio, shape and size of footing on bearing capacity of footing were studied. Comparison is made between bearing capacity of footings estimated by the conventional methods such as Vesic’s, Tezaghi’s method and that estimated by Model Test Results. The model tests provide qualitative information on parameters influencing bearing capacity of footings. These tests can be used to check the bearing capacity estimated by analytical method.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Pathak, S. R.; Kamat, S. N.; and Phatak, D. R., "Study of Behaviour of Square and Rectangular Footings Resting on Cohesive Soils Based on Model Tests" (2008). International Conference on Case Histories in Geotechnical Engineering. 31.
https://scholarsmine.mst.edu/icchge/6icchge/session_01/31
Study of Behaviour of Square and Rectangular Footings Resting on Cohesive Soils Based on Model Tests
Arlington, Virginia
The estimation of a reliable value of bearing Capacity of soil is the most important step in the foundation design work. Number of theoretical approaches and in-situ tests for the estimation of bearing capacity of footing are available. The reliability of any theory can be demonstrated by comparing the experimental test results on field footings with theoretical predictions. One of the reliable methods is the load test on full sized footing. However, this test as covered under IS 1888-1982 is too expensive and time consuming. Model tests can be conducted on footings of various sizes. The surface characteristics for different loading conditions can provide information on qualitative and quantitative contribution of such parameters on bearing of footings in absence of field test results. It is revealed that research work (Sawant et al (2000), Rajgopal et al (2000), Sawaf et al (2005), Mohmoud et al (1989), Harikrishna et al(2000), Sahu et al (1970) etc.)has been carried out for load tests on model footings resting on sand as foundation medium. However no work has been reported so far on c – Φ soil. In this present study a laboratory model with loading frame has been developed in Geotechnical Engineering Laboratory of College of Engineering, Pune to conduct small scale load tests, to determine Bearing capacity characteristics of footings resting on c-Φ soil. Load tests were conducted on two square, two circular and five rectangular footings resting on c – Φ soil in the laboratory model. The bearing capacity, time – settlement relationship, pressure settlement relationship of footing resting on c – Φ soil and effect of various parameters such as L/B ratio, shape and size of footing on bearing capacity of footing were studied. Comparison is made between bearing capacity of footings estimated by the conventional methods such as Vesic’s, Tezaghi’s method and that estimated by Model Test Results. The model tests provide qualitative information on parameters influencing bearing capacity of footings. These tests can be used to check the bearing capacity estimated by analytical method.
