Análise técnico-econômica dos métodos construtivos de paredes diafragma moldadas in loco, estacas-prancha e estacas secantes

Abstract

This paper presents a technical and economic study, on retaining wall methods as the molded in place diaphragm wall, sheet pile and secant pile, used in urban infrastructure and touristic construction sites located in Fortaleza, Ceará. The case study of this paper analyzed the construction and preventive maintenance costs, and technical and execution aspects of the methods used in tunnel works of Santos Dumont Avenue with Expressway, the Ceará Aquarium and the Rotary Tunnel at Castelão Arena. Despite having major technical advantages, the Secant Pile is still a executive process with significantly higher cost than molded in place diaphragm wall. Thus, for reasons of economic viability and still being a great contention method, the molded in place diaphragm wall becomes the most advantageous method.