Journal of Civil Engineering Researchers
Volume:1 Issue: 2, 2017

Welding connections are so common in steel structures. Weldments, designed by engineers are mostly strong enough, but the problem starts at the construction part, where welders without enough experiences do their work wrong and make defects in welds. So inspection and controls are needed to have strong enough weldments in connections. In this article thethree levels of inspection is discussed respectively, according the references. Some of the common NDT and DT tests are explained with pictures. At the end this ways of inspection are compared to check which one is better for each welding.©2017Journals-Researchers. All rights reserved.

Knowledge management (KM) is an important issue in the construction sectorand complements the activities of corporate business strategy every business has become. The lessons learned from the construction industry has proven to reuse and share knowledge Can with reduce the cost and time of completion of the project and to increase the competitiveness of the entire organization to increase organizational success of the project. The aim of this paper is to introduce and discuss the advantages and disadvantages of knowledge management models are used to manage the construction industry. Executive challenges of knowledge management in organizations, lack of a systematic approach to the development and use of knowledge management systems (KMSs). A corporate competitiveness, to depend on the organization's ability to learn faster than their competitors. Organizational learning process the ability to collect and use the knowledge, skills and behaviors that have the potential to educate people and enforcement activities are the organization's future depends.© 2017Journals-Researchers. All rights reserved.

In this article we intend to explain about nailing and anchorage as conventional methods of stabilization of deep pits and in the following the implementation methods of each one's will be explained and we will understand that these two methods are very effective to restrain against earth lateral pressure and in some cases a combination of these methods is too practical.© 2017Journals-Researchers. All rights reserved

Tunnelis a horizontal or almosthorizontal underground corridor that From both sides or one side is connected with the open air. The world's oldest known tunnel is in Mesopotamia which dates back to about 4000 years ago. Tunnels made in recent years are classified into three general categories tunnels, transportation, industrial and mining. Type of ground, dimensions tunnel and environmental features are important factors in the design and selection of drilling tunnels. Tunnel digging carried out with hand tools or machines mechanized and in different ways. In mechanized tunnel drilling used a variety of machines such as jumbo drills, boom type machines and tunnel boring machines .In this paper presented a revision in relation to number of tunnel drilling methods in different fields and machines used in each of these methods. © 2017Journals-Researchers. All rights reserved.

In this article,we have reviewed Concrete Filled Tube(CFT) as a modern structural technology, whichbenefitsadvantages of both steel and concrete structures simultaneously. Then its materials and construction issues are discussed andconcluded that it is one of the efficient technologies, whichcan be used to increase ductility and strength in structures.© 2017Journals-Researchers. All rights reserved.