Abstarct: Nowadays, one of the ways to improve problematic soils is to use different types of piles. Investigating the types of piles in terms of performance and factors affecting load capacity has become critical. One of the challenges geotechnical engineers face is choosing the type and shape of the desired pile. Many factors can affect this choice, the most critical parameter of which is the bearing capacity of the piles, which depends a lot on the shape of the pile cross-section. Despite the studies conducted on the behavior of helical piles in recent years, researchers still emphasize the need for more studies to know the exact and completeness of helical piles so that they can provide definite recommendations about the practical use of this type of piles. This study presents the results of the physical modeling of helical pile 1G under monotonic and cyclic loading in dry sand at different densities. The parameters measured during the test include maximum tolerable forces in tension and compression, number of cycles, average load, cyclic amplitude, etc., which have been used to investigate pile behavior and changes in load capacity. This study found that under monotonic tests, the ultimate tensile capacity of a single helical pile is 20% of its ultimate compressive capacity. On the other hand, adding one helix to the last helical pile and becoming a two-helix helical pile makes its final tensile capacity 25% of the final compressive capacity. During cyclic loading, increasing the number of pile helices does not affect the number of cycles because, in a two-helix pile, the second helix has shown unfavorable performance due to being located in the damaged part of the soil.