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| Of the seven sections in the eastern lot, Kajima is in charge of Sections 2, 4, and 7. The following is an overview of each of these sections. |
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Building toward the Horizon IT Earthwork Control Systems are used throughout the section. As one example of works using these systems, GPS is used to control the movement of heavy equipment and surveying operations. Equipping a motorized grader with a GPS antenna allows the blade height and angle to be automatically adjusted. These methods are also used in Japan, but due to the scale of this project, the effectiveness of these methods is even more remarkable here. The technology will be used on other sections as well in the future. |
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Operations in a Landslide Zone Due to the internal security situation in Algeria, there are strict regulations on explosives, and this has a big impact on blasting operations. At the tunnel site, in order to speed up the process, the tunnel is not only dug simultaneously from both ends, but also from near the center. An access tunnel is now being bored down to the center portion of the planned tunnel. |
Section 4 is only 9 kilometers, which is the shortest stretch for any section. However, since it is a mountainous section, the construction includes the creation of two tunnels and is much more difficult. Furthermore, the type of mudstone particular to this area, called marl, has a tendency to expand and become unstable when wet, creating a hazard for large-scale landslides. Therefore, comprehensive landslide protection measures need to be taken around tunnel entrances, including improvement of the roadbed, and the removal of earth and sand that is prone to subside. Site Manager Tadashi Tanaka, who showed us around the site, had this to say, “I am once again realizing how difficult it is to move earth. Since this is rock strata that is rarely seen in Japan, we are being extra careful.”| |
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| Section 7 runs for 124 kilometers west from the Tunisian border, and is the longest section in the project. It runs through a lush green coastal region. Since the motorway will cut across the El Kala National Park, passageways must be created to allow sheep, as well as frogs and other small animals, to cross under the road. The motorway has been designed with consideration for conservation of the environment and the ecosystems of the region. |
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The Cities of Algeria |
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The capital city of Algiers is a major urban center of 5.5 million people. Numerous fast food restaurants and Internet cafes can be found in the central part of the city. The COJAAL office in Algiers is located in the Hydra residential district, and is also home to many other Japanese enterprises. During the day, the markets are a hub of activity in Algiers, and they support the daily life of the local people. There are many shops selling everything from food products to clothing to daily sundries. The stalls are crammed with fresh seafood and vegetables. Constantine, where the Headquarters is located, is called the “city of bridges.” During the colonial period, French civil engineering technology was introduced, and various beautiful bridges were built over the gorge of the Rummel River, which runs through the city. These bridges offer stunning views of the town below. In Algeria there are a number of UNESCO World Heritage Sites including the Roman ruins at Djémila, Tipasa, and Timgad. The country offers a wealth of sightseeing spots relatively unknown to outsiders. |
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Top Chapter 1: Project Overview Chapter 2: Daily Life in the Camps Chapter 3: Interview Chapter 4: Construction Tasks for Each Section |
