Abstract Using the deep foundation pit project of Bagou station of Beijing metro line 10 as an example, and con?
sidering the mechanical properties of the pile-soil interface, a three-dimensional finite difference model was built,and the internal force and deformation of the retaining piles were analyzed, as compared with the monitored data.Furthermore, the effects on the internal force and deformation of the retaining piles caused by the soil frictional angle and the friction coefficients of normal and tangential coupling springs of the pile-soil contact interface are discussed. It is concluded that the bending moments and horizontal displacements of the retaining piles decrease with the increase of the soil frictional angle, and the influence degree diminishes gradually; both the maximum bending moment and horizontal displacement increase at first and then remain invariant with the increase of the friction coef?
ficient of the normal coupling spring, while the friction coefficient of the tangential coupling spring has little effect on them. This conclusion provides a reference for the design and calculations of retaining structures with similar deep foundation pit projects.
Abstract：
Using the deep foundation pit project of Bagou station of Beijing metro line 10 as an example, and con?
sidering the mechanical properties of the pile-soil interface, a three-dimensional finite difference model was built,and the internal force and deformation of the retaining piles were analyzed, as compared with the monitored data.Furthermore, the effects on the internal force and deformation of the retaining piles caused by the soil frictional angle and the friction coefficients of normal and tangential coupling springs of the pile-soil contact interface are discussed. It is concluded that the bending moments and horizontal displacements of the retaining piles decrease with the increase of the soil frictional angle, and the influence degree diminishes gradually; both the maximum bending moment and horizontal displacement increase at first and then remain invariant with the increase of the friction coef?
ficient of the normal coupling spring, while the friction coefficient of the tangential coupling spring has little effect on them. This conclusion provides a reference for the design and calculations of retaining structures with similar deep foundation pit projects.
.Analysis of Internal Forces and Deformations of Retaining Piles Considering Mechanical Properties of the Pile-Soil Interface[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(3): 58-64
2017, Vol. 54 