IMPACT OF THE CONSTRUCTION PHASE ON THE COASTAL STRUCTURE BEHAVIOR

Abstract

The behavior of the partially completed coastal structure within the construction phase is not deeply studied within the design phase. However, this leads to a significant impact on the environment and unexpected coastal problems within the project lifetime. Construction methodology, structure schedules and construction season are part of the construction phase parameters that affect the final behavior of the coastal structures. This study highlight the effect of the construction phase, factor affecting it, and its effect on the structure final behavior. The method used depends on detail field monitoring for the effect and behavior of some Egyptian coastal structures within the construction phase during the period from 1990 to 2016. The effect of the construction methods, the construction schedule and delay, as well as the effect of construction phase on the structure final behaviors are checked within the monitoring program. Miami-El Mandra coastal area protection work at Alexandria, Six of October village detached breakwaters at the northwest coast of Egypt and Baltim detached breakwaters at the Nile Delta are part of the Egyptian coastal protection work which monitoring to identify the effect of the construction phase. Analyzing the monitoring program data from the three areas show that, construction methodology and schedule can change the structure behavior as in the case of Baltim breakwaters. On the other hand, the delay within the construction schedule can cause serious environmental problems as for the case of Miami-El Mandra protection work and Six of October village. To improve the environmental condition, it is recommended to include the construction phase as well as the risk assessment study for the delay within the construction phase as a main part in the environmental impact assessment study. In addition, Contractures should execute during-construction monitoring to improve coastal construction techniques for the future works.