19ª ICSMEG, 17-22 de Septiembre 2017 Seúl, Corea
En septiembre de 2017 se ha celebrado la 19ª International Conference in Soil Mechanics and Geological Engineering (ICSMEG).
Nuestro grupo, SOLETANCHE BACHY, colabora como sponsor en este evento.
RODIO KRONSA, por su parte, ha aportado un artículo en colaboración con el Laboratorio de Geotecnia del Centro de Estudios y Experimentación de Obras Públicas (CEDEX) y la Universidad de Valencia.
THERMO-MECHANICAL BEHAVIOR OF AN EXPERIMENTAL PRECAST CONCRETE PILE
Fernando Pardo de Santayana, Cristina de Santiago & Maria de Groot, Laboratorio de Geotecnia – CEDEX, Madrid, Spain,
Javier Uchueguía, Universidad Politécnica de Valencia, Spain
José Luis Arcos, Rodio Kronsa, Spain
ABSTRACT: An experimental precast concrete thermo-pile was fabricated and driven in Valencia, Spain, prepared to operate as a heat exchanger foundation element under the simultaneous action of mechanical and thermal loads. Vertical mechanical loads were applied with the aid of a reaction frame and anchors, and thermal loads were introduced by injecting heat through a primary circuit installed in the pile and by the use of mobile thermal installation provided with a reversible heat pump. Several in situ static vertical load tests were carried out on the pile, in order to analyze its mechanical behavior. Subsequently, maintaining the vertical mechanical service load, a first test of thermal characterization of the pile-ground system was performed by applying different steps of heat power injection. Finally, the pile was subjected to a test consisting of the application of 14 daily cycles of thermal loads, as if the pile were integrated in an actual geothermal installation of an office building, under constant mechanical load, simulating the conditions of operation in cooling mode. The results of these tests are presented and analyzed, showing the influence of the thermal loads on the mechanical behavior of the pile as well as on its margin of safety regarding bearing resistance and structural failure limit states.