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Design and construction of two integral bridges for the runway of Milan Malpensa Airport
Published in Fabio Biondini, Dan M. Frangopol, Design, Assessment, Monitoring and Maintenance of Bridges and Infrastructure Networks, 2020
Pier Giorgio Malerba, Giacomo Comaita
The following phases concerned the excavation of the two lateral trenches, the placement of the formworks and of the reinforcement and the casting of the footings (Figure 6). The footings had to be longitudinally continuous, so at each stage of the casting, rebar segments were left in order to maintain the reinforcement continuity. In a similar way, vertical rebar segments were left in order to provide continuity with the vertical walls. Once the footings had been completed, the abutments were cast. A bituminous waterproofing layer was applied on the basement and on the vertical surfaces of the walls. Moreover, on the vertical walls, a continuous drainage curtain was built by means of 22-mm thick panels, put side by side, each made of two membranes, imbricated to each other through plastic filaments. The external surfaces of these membranes were made of geotextile, meant to prevent fine particles from filtering into the drainage wall and obstructing it.
NIGERIA
Published in Richard Helmer, Ivanildo Hespanhol, Water Pollution Control, 2017
Richard Helmer, Ivanildo Hespanhol
Basement Complex, composed mainly of metamorphic a"d igneous rocks. However, there are fairly extensive areas of fractured schists, quartzites and metamorphosed derivatives of ancient sediments from which water is often available at great depth. The sedimentary formations such as the Ternary deposits of the Chad -Sokotu basins, the Cretaceous deposits of the Niger and Benue troughs, anu the sedimentary formation of the Niger Delta, yield g-oundwater in varying quantities.
Experimental and numerical modeling of moving retaining wall in expansive soil
Published in Geomechanics and Geoengineering, 2021
Khawla A. K. Al-Juari, Mohammed Y. Fattah, Suhail I. A. Khattab, Mohammed K. Al-Shamam
Retaining structures such as retaining walls and basement walls are widely common in foundation engineering as they employed to support natural slopes of soil. Proper design and construction of these structures require a comprehensive knowledge of the basic soil properties such as dry unit weight, initial water content, angle of internal friction and cohesion. From these parameters, the lateral forces can determine which is essential for the design requirement. Lateral earth pressure imposed against retaining structure is obtained from the combined effect of several types of lateral stresses such as overburden pressure, surcharge loading, water table, suction stress and lateral swelling pressure.