Open-Ended Pipe Piles with Wings Exterior Wings – Interior Wings Double Wings (Exterior and Interior) Exterior Contrary Wings)

The content of the patent represents propose and manufacture the new four types of the open-ended pipe pile through the investment of two important factors that responsible for the capacity of hollow pipe piles. The first factor has represented by the capacity of the soil plug phenomena that developed from the development of the interior shear stresses for the constrained soil inside the hollow (open-ended) pipe pile. While the second factor has represented by the invest the peak shear stresses at the exterior face of the pile, that founded at a few distances above the pile tip. The new models of the open-ended pipe piles have represented by adding wings at the bottom region of the pipe pile with different locations have fixed. The first location at the exterior face. The second location at the interior face inside the pipe pile. The third at the exterior and interior face. The fourth location at an exterior face with contrary wingsThe new models of open-ended pipe piles with (exterior wings, interior wings, double wings, and exterior contrary wings) have studied by testing 38 models of open-ended pipe piles with diameters (D =40 mm), to evaluate the bearing capacity and behavior of the soil plug for these models. And, have also compared with traditional open-ended pipe piles and closed-end pipe piles. The testing of the pile models has divided into six groups, the first group represents two models of the traditional open-ended pipe pile, and the second group represents two models of the traditional closed-end pipe piles. The third group represents ten models of the open-ended pipe piles with exterior wings (five exterior wings have distributed with equal distance along the perimeter of the pile) and different lengths of wings have studied (2D,3D,4D, and 5D) with a width of wings (0.2D) where D the exterior diameter of the pile model. The fourth group represents ten models of the open-ended pipe piles with interior wings (five interior wings have distributed with equal distance along the perimeter of the pile) and different lengths of wings have studied (2D,3D,4D, and 5D) with a width of wings (0.2D) where D the exterior diameter of the pile model. The five groups represent ten models of pile model the open-ended pipe piles with double wings (exterior and interior) (five interior and exterior wings have distributed with equal distance along the perimeter of the pile) and different lengths of wings have studied (2D,3D,4D, and 5D) with a width of wings (0.2D) where D the exterior diameter, and the sixth group represents two models of the open-ended pipe piles with exterior contrary wings. All apparatus and testing tools setup have manufactured, for installing and applied load on the piles model, with the approach of the testing method at a constant rate of penetration. Two lengths to diameter ratios considered in this study (L/D=15 and L/D=20). The model piles have tested in loose dry sand. The results show that the piles with exterior wings give a higher-bearing capacity. Especially for the length of wings (5D), that gives (106%) than the traditional open-ended pipe pile, and (57%) than the traditional closed-end pipe pile for (L/D=15) and (67%) than the traditional open-ended pipe pile. And exterior wings with length (3D) gives (57%) than the traditional open-ended pipe pile, and (11%) than the traditional closed-end pipe pile for (L/D=20).And piles with interior wings give a higher-bearing capacity. Especially for the length of wings (5D), that gives (136%) than the traditional open-ended pipe pile, and (80%) than the traditional closed-end pipe pile for (L/D=15). And interior wings with length (3D) give (40%) than the traditional open-ended pipe pile for (L/D=20). And piles with double (interior and exterior) wings give a higher-bearing capacity with a length of wings (3D), that gives (134%) than the traditional open-ended pipe pile, and (79%) than the traditional closed-end pipe pile for (L/D=15). And (86%) than the traditional open-ended pipe pile, and (24%) than the traditional closed-end pipe pile for (L/D=20). And get higher-bearing capacity for open-ended pipe piles with exterior contrary wings (81%) than the traditional open-ended pipe pile, and (39%) than the traditional closed-end pipe pile for (L/D=15). And (105%) than the traditional open-ended pipe pile, and (36%) than the traditional closed-end pipe pile for (L/D=20).