Ensaios de carregamento dinâmico em estacas no complexo de Suape

Abstract

This presented work analysis of the load capacity of the dynamic load test carried through in the props used in the construction of the Atlântico Sul Shipyard and Internal Wharf IV (Port of Suape - PE). The assayed piles are of the type continuos fly anger and pre cast concrete. Also the location of the piles and soundings are presented, characteristics, executive proceeding and instrumentation of the studied piles, as well as the compilation of the results found through the registers of monitoring of the piles. With the results of load capacity of cuttings obtained through and dynamic loading test surveys SPT (Stand penetration test), comparisons were made with the methods: Aoki and Velloso (1975) and Décourt (1996). From the curves load x settlement generated for method CAPWAP of the props had been carried through attempts of verification of load capacity, through the intersection of the curve with the extrapolation of the straight line proposal for NBR 6122/1996, Method of Davisson (1972), rupture load corresponds stresses to it for the method of Terzaghi (1942) and Method of De Beer (1967). Discussed in this work the influence of damping coefficient (J), the efficiency of the system of crimping and proposed an expression for the calculation of tension in pile driving pre-shaped, from the back analysis of the expression of Broms and e analysis of the lateral attrition by means of the comparison between methods half-empiricists and established hypotheses. One concludes that the presented results of the load capacity in the methods Aoki and Velloso (1975) and Décourt (1996) based in the soundings of reference of the assay in general does not demonstrate compatibility with the load capacity of the assay of the ECD; with regard to the curves load x it stresses, the methods and adopted hypotheses indicate that the reached maximum shipment level in the assay, was not enough to mobilize the total load capacity of the props