Research Due Sri Lanka has Residual (laterite) soil

 Research Proposal

 

 

 A
STUDY ON THE MOMENT CARRYING CAPACITY OF PAD FOOTINGS.

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H.T.V.FONSEKA

140167E

Supervisor:

 

DR.
L. I. N. DE SILVA

 

 

 

 

 

12thJanuary,
2018

 

Department
of Civil Engineering

Faculty
of Engineering

UNIVERSITY
OF MORATUWA-SRI LANKA

Table of Contents

 

 

Introduction……………………………………………………………………………….1
Problem Statement…………………………………………………………………………1
Significance of the
research………………………………………………………………..2
Scope of the study…………………………………………………………………………2
Aims and Objectives of the
research……………………………………………………….2
Proposed Methodology……………………………………………………………….……3
Time schedule/work plan…………………………………………………..………………3
Bibliography/References …………………………………………………………………4

Introduction

 

 

 

Most of the structures fail during windy seasons due
to wind load (lateral load) in Sri Lanka. Specially advertisement boards fails
by overturning. And also wind turbines also subjected to big lateral forces
continuously. Construction of the wind turbines in Sri Lanka are also going on.
All of these structures are made on shallow foundations. So it is need to
investigate the moment carrying capacity of shallow foundations on Residual (laterite)
soil. Due Sri Lanka has Residual (laterite) soil in most of the places.

 In most of the
structural designs it is used to assume moment carrying capacity of shallow
foundations are significantly low or in some cases it is used to neglect the
force. If we able to predict the resistance to moment of Residual (laterite) soils,
we could able to design more conservative and economical designs.

To have more economical and safe structures it is
needed to investigate the moment carrying capacity of pad foundations in Residual
(laterite) soil.

.

 

Problem Statement

 

 

 

Sri Lanka mostly has Residual (laterite) soils. But
there is no investigation carried out to determine the behavior of Residual
(laterite) soils. This is to address the Residual (laterite) soil moment
carrying capacity at different depths.

 

 

 

 

 

 

 

 

 

 

Significance of the Research

 

 

 

When designing the structures mostly it ignore or the
estimate low values of moment carrying capacity of soils. From the past
researches it is found that sandy soils moment carrying capacity is low. It was
adopted and use in Sri Lankan designs, but actually Sri Lanka has mostly Residual
(laterite)soils and we those conditions are not 100% valid for Sri Lankan
soils. 

In engineering
point of view, it will be a good solution for parking areas, walking paths and
other paving areas where the runoff and pooling of water had been major issues.
Also it reduces the need for drainage infrastructure and irrigation systems
hence the cost for them.

 

 

 

Scope of the Study

 

 

Experimental analysis of moment carrying capacity of
square foundation of 300mmX300mm square foundation in Residual (laterite) soils
at different depths and investigate the soil behavior and relationship between
depth and capacity.

A numerical analysis of square foundations for the
model foundation using Midas software.

A numerical analysis for full scale foundations using
Midas software.

 

Objectives

 

 

1.     
To determine the moment carrying capacity of square pad
foundations at different depths using experimental data.

2.     
Numerical analysis of model foundations.

3.     
Comparison between numerical , experimental values and
Theoretical values .

4.     
Numerical analysis of actual size foundations

 

 

Methodology

 

 

 

Work Plan

 

 

 

 

Task

2017

2018

Dec

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

 

Literature Review

 

 

 

 

 

 

 

 

 

 

 

 

Collect representative
samples

 

 

 

 

 

 

 

 

 

 

 

 

Investigate Soil parameters

 

 

 

 

 

 

 

 

 

 

 

 

Experimental Studies

 

 

 

 

 

 

 

 

 

 

 

 

Numerical Studies

 

 

 

 

 

 

 

 

 

 

 

 

Data analysis

 

 

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                                                                                           

References
                                                                                                                                                           

Dong, H., Feng Gao, Q., & Dwng, Z. D. (2017).
Wind-induced dynamics amplification effects on shalow foundation of a
Horizonal -Axis wind turbine. Computers and Geotechnics ,           88, 9-17.
 
Patnaik, A. K., Nikaraz, H., Young, S. M., & McIntyre,
C. N. (2000). Moment Carrying Capacity of shallow foundations resting on
sandy soil. Australian Geomechanics.
 
Ramesh, M., Kuklik, P., & Valek, M. (2017). Several
comments on numerical modeling of shallow foundations. Procedia
Engineering (pp. 73-80). Elsevier Ltd.
 
Taiebat, H. A., & Carter, J. P. (2000). Numerical
Studies of the bearing capacity of shallow foundations on cohesive soil
subjected to combined loading. Geotechnique , 50, 409-418.