A novel cavity expansion-based analytical tool and its potential application for energy pile foundation

摘要

Energy pile gradually adopted in many countries, which is compatible with the principles ofrnsustainable development. Extensive field and laboratory experiments are being undertaken in order to evaluaternits thermal-mechanical performance. However, there is no sound theoretical method to reveal the fundamentalrnmechanism of energy pile, particularly in evaluating the pile capacity change due to the temperature change.rnThis paper develops a potential useful analytical tool for analyzing the energy pile performance and in particularrnto quantify the stress changes at the pile-soil interface induced by the temperature change. The analytical toolrnis formulated by incorporating Laloui et al ’s Advanced Constitutive Model for Environment Geomechanics-rnThermal effect (ACMEG-T) into the Cavity ExpansionTheory (CET), namelyThermal-Cavity ExpansionTheoryrn(TCET). The TCET has potential application in energy pile foundation and may provide a theoretical basis forrndeveloping design methods of energy pile capacity in the future.