TÍNH TOÁN MÓNG CỌC XIÊN CHÉO LỚN CHO ĐẬP TRỤ ĐỠ

Abstract

Pillar supported dams have shown both technical and economic efficiency. The characteristics of the pillar dams are both vertical and horizontal force bearing; the horizontal forces acting on hydraulic structures are quite large, depending on the difference of the water head of before and after the structures. Meanwhile, the vertical bearing capacity of the foundation is much greater than the horizontal bearing capacity of the structures. This paper compares the bearing capacity of the foundation of different pipe arrangments (entire vertical piles, entire inclining pipes, and large two-way inclining pipes) with the same vertical load (N), horizontal load (H). The result shows the large two-way inclining piles foundation is optimal for pillar supported dams. The paper also proposes a set of equations for pile arrangement in the pillar supported dam. Finally, the paper synthesizes results of large two-way inclining piles foundation for some projects that have been constructed or being built in Vietnam.