Execution Management of Deep Excavation in Addis Ababa Construction Projects
No Thumbnail Available
Date
2016-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
To alleviate the traffic congestion of the A.A city, it is vital and crucial to allocate underpass and
overpass transportation means for the expansion of roads and construction of supportive infrastructure.
Although, the construction of high rise building are significantly increasing, especially by financial and
commercial institutions as well as by other individual investors for hotel and real state purposes. Those
buildings require large parking area, stores and other facilities that can only be alleviated by constructing
basements. To construct basements and underground transportation means deep excavation is a must.
Deep excavation is an important component of construction which relieves shortage of space and allows
usage of underground spaces for different structures. Thus, this thesis is prepared to study practice of
deep excavation in scientific way and to develop a better ways for execution of deep excavation in urban
areas.
The research was undertaken to assess the practices in planning, quality assurance services and
execution, identify challenges that need to be addressed and to recommend interventions in order to
improve execution management of deep excavation in A.A. civil work projects. Accordingly, a literature
review was conducted on related topics, through which numerous variables challenge was identified. In
the matter of fact, detailed analyses were accomplished with primary data collected through
questionnaire, interviews and by physical observation of projects.
The response are found from different professional found in employers, consultants and contractors side
and which are engaged on the three civil work construction projects (i.e. building, road & railway). The
responses are calculated by using a weight average technique of all groups as per each variable ranked.
Based on the findings it is observed that, challenges as safety and health management, lack of recording
construction events, wrong calculation of earth pressure and lack of well qualified and experienced
professionals found to be the most common outstanding once. Failures encountered and observed from
respondents are differential settlement, subsidence of ground, cracks on nearby structures and collapse
on adjacent structures including small injuries up to loss of lives of workers and also neighboring
community living on adjacent have been recorded & investigated.
Recommendations are forwarded by pointing out the responses & expectations from clients, consultants
and contractors. Those recommendations cultivate us to adopt quality assurance by implementing
recording and analyzing construction events with close supervision. During construction, monitoring
execution compliance by regulatory bodies and upgrading professionals experience through continuous
professional development trainings are deemed as remedial measure to execute fatal and hazard free
deep excavation in A.A.
Description
Keywords
Roads and construction