Safety Study and Analysis of The Value of Friction Coefficient of Embedded Rock Piles on Their Bearing Characteristics

Abstract With the advancement of national urbanization, pile foundations continue to show the remarkable characteristics of “large depth and multiple soil layers”. As the “root” of building safety, the theoretical models and numerical methods for its bearing characteristics have emerged in recent years. However, when the friction coefficient is selected according to experience, it does not consider the safety impact of different friction coefficient values on its bearing characteristics, nor does it consider the difference in soil layers. In this paper, the control variable test and orthogonal test are carried out by using the single and mixed friction coefficient value method for different soil layers of rock‐socketed piles. The error rate of pile foundation settlement is used as the safety influence index of friction coefficient value on its bearing characteristics. The results show that when the friction coefficient of different soil layers of rock‐socketed piles is mixed. The error rate is reduced from 4.02% of the single factor value method to 3.27%, which more effectively guarantees the safety of pile foundation design and can also provide experience for similar projects.