Analysis of Influencing Factors on Bearing Characteristics of PCC Energy Pile Group

Abstract

AbstractPCC energy piles are a new type of energy pile technology in the field of geotechnical engineering in recent years, which has the technical advantages of convenient construction, good economy and energy savings. The three-dimensional numerical analysis model of PCC energy pile groups is established by finite element software. The influence of the pile number and pile spacing on the pile top displacement, pile tip resistance and pile body stress of the PCC energy pile group under two working conditions of temperature action and temperature-load combined action are studied, and the pile group and single pile are compared and analyzed under each working condition. The results show that the pile top displacement and pile end resistance of pile groups increase with increasing pile number and decrease with increasing pile spacing under the action of temperature. The pile body stress of the pile groups decreases with increasing pile number and increases with increasing pile spacing. When the load is added on the pile top, the displacement of the pile top caused by the temperature decreases, and the resistance of the pile end and the stress of the pile body increase.KeywordsPCC energy pileGroup pilesBearing characteristicsNumber of pilesPile spacingNumerical simulation