Abstract: Nowadays, the researches on the thermo-mechanical behavior of energy diaphragm wall lacks in contrast to its increasing
significance in energy geostructures worldwide. To study the thermo-mechanical behavior of wall and wall-soil interface under
different heating and constraining conditions, three contrast tests were conducted in a self-made laboratory model chamber. By
analysing the data obtained, this paper presented the change laws of fields regarding heat, vertical strain in wall, and normal stress on
the interface during process. Furthermore, the variations of these parameters revealed the mechanism, in which temperature changes
and constrain changes would influence the thermo-mechanical behavior of energy diaphragm wall.