Phân tích hố đào sâu sử dụng cọc khoan nhồi kết hợp thi công vách dạng tròn phân đoạn theo phương đứng bằng phương pháp phần tử hữu hạn 2D & 3D

Abstract

The construction of deep excavation pit in circular circumference with the advantage of self stabilizing under the effect of soil pressure, does not need shoring system that has been analyzed in many previous paper. The main content of this study is to analyze the form of a deep excavation hole in the geological stratum of medium fine sand, and clayey in the Central Coast region of Vietnam using the surrounding bored pile wall, combined with the construction of the inner retaining wall section in circular circumference, Top - Down construction sequence of each retaining wall segment from top to bottom by Plaxis 2D and 3D finite element method, combined with actual horizontal displacement monitoring data of the bored pile wall to analyze more clearly the behavior of the ring effect of the retaining wall segments as well as the capping beam of the bored pile wall.