The management of construction projects needs to complete the basics of system management and work. Starting from the idea and how to turn it into a full study and ended at the construction project completion arriving at the purpose prepared for it, so the projects need to control on its operation and integration system in order to succeed. It is no secret for who concerned in construction projects field that the design stage is a very important stage in construction project because it determines the final features of the project through the requirements provided by the employer for the consultant to formulate it during this phase in the form of plans, drawings, and specifications, then translated on the ground as the shape of completed project meets those requirements. Therefore it has been necessary to focus in this paper on the design stage also demonstrated and analysis the most important risk facing this stage and their impact on a construction project by introducing a questionnaire to identify the most important risks factors at this stage affecting on the project. The paper had been shown that the effect of the design stage on Lump sum type of project contract was higher than the unit price, while the most important factor effect on a project its fast response of design team to prepare the design documents in order to facilitate the workflow and sequence of execution with effect level 3.714.  

Limited resources and budget are the most important problem facing the road management sector; therefore, apportionment of maintenance and rehabilitation (M&R) requirements and priorities at the right time and logical are the most significant factors. Roadway will request continuous (M&R) works to avoid deterioration result from repetitive vehicle weight as well as other factors such as environmental factors. Whether, with the allocation budget that was allocated for roadway maintenance work; there is a necessity to efficiently used the obtainable funding. To execute this, a systematic approach for planning M-and-R process to reach optimum the benefits from roadway segment and minimize necessary funding and costs to repeat the pavement into first state. This process defined as the pavement maintenance management system (PMMS); thus, approach would enable agency to allotted funds, labors, equipment and other resources, most efficiently .This paper demonstrates the applying process of the maintenance program according to the genetic algorithm optimization. The aim of it was to obtain the optimal maintenance strategy alternative percent to reach best values for service life extended as well as increasing the pavement condition index (PCI) along with a specific budget that is not sufficient to restore the whole pavement to its previous state. After applying this program, it was found that it gives the road an additional service life (1.2 years), and at the same time it gives an increase in PCI value (3.8%), taking into consideration the limited resources allocated for maintenance.

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The expansive soils can be founded in various regions and extent areas in the south, middle and north of Iraq. Damage to these soils may appear immediately after construction within five years, or it may take several years until something happen to disturb to moisture structure of the soil. This work aims to find the relation between Atterberg limits, swelling potential, and swelling pressure for five samples. This work is projected to forecast the volume changes in site soil associated with the changes in soil plasticity. The behavior of an expansive soil (bentonite sand mixture) (B-S) subjected to the Atterberg limits test and swelling test were studied. Also, it was found that simple classification tests can provide reasonable estimates of field edges. The potential probability forecasts using the consolidation standard were sometimes low, often as little as possible compared to field observations. Predictions based on the soil suction method provided reasonable higher limits for all test sites.