نوع مقاله : پژوهشی
نویسندگان
دانشکدهی مهندسی عمران، دانشگاه تبریز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Many buildings and structures require the use of deep foundations to utilize the bearing capacity of stronger soil layers. Pile groups are one particular type of deep foundation commonly used for large structures. In addition to vertical loads that must be sustained by the piles, significant lateral loads may be present and must be accounted for in the design. These lateral loads can come from a variety of sources, such as wind forces, collisions, wave or ice impact, earthquake shaking, liquefaction and slope failure. A pile group subjected to lateral loading is nfluenced by the existence of neighboring piles. This pile-soil-pile interaction is strongly dependent on the pile-to-pile spacing, which dominates the pattern of stress and deformation around a pile group. Full-scale tests are generally believed to provide the most accurate results, but are rare due to high costs. Therefore, many studies are available concerning centrifuge and model testing. In this paper, the behaviour of soil around laterally loaded pile groups in sand for different cases were studied and interpreted in the laboratory on small scale physical models, using the Particle Image Velocimetry (PIV) method. The group effect and interaction between piles in a pile group were also studied. A wooden box was used as the test box. A transparent sheet was used in place of a fourth wooden wall. Plexiglass was used to allow observation of the deformations in the soil sample. The soil was fine, dry sand. The soil was placed in the box using a sand raining system, in order to obtain a uniform and homogeneous medium. Rectangular piles were selected, in order to apply the similitude law. The smallest dimensions of piles were in contact with the Plexiglass. The 2
کلیدواژهها [English]
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