Experimental of Thermal and Mechanical Coupling Characteristics of Energy Pile Under Different Working Loads
In this paper,the temperature cyclic load tests of energy pile in loess foundation under three different load conditions were conducted.Based on this,the vertical load characteristics tests of energy pile were carried out,and the variation laws of heat exchange efficiency,pile top vertical load,pile soil settlement,pile axial force,pile side friction resistance and pile tip reaction were com-pared and analyzed.The test results indicate that the vertical load of the pile top decreases with the increase of temperature cycles,and the settlement of the pile top shows convergence.The pressure zone within the pile body during hot cycle is proportional to the working load and number of cold cy-cle.When the working load at the top of the pile is small,the cold and hot cycling have a greater in-fluence on side friction resistance,with greater resistance during cold cycling.The size of working load is a controlling factor for relative displacement between piles and soil.The zero point of tempera-ture displacement has different effects on lateral friction resistance and relative displacement between piles and soil during thermocycling.
energy pilemodel testloess foundationthennocycling testpile top settlement
万方数据
维普
