Open AccessDETERMINATION OF ADDITIONAL LOAD ON THE BRIDGE FOUNDATION PILE when the karst deformation development
Author(s) -
N. Z. Gotman,
A. G Evdokimov
Publication year - 2021
Publication title -
construction and geotechnics
Language(s) - English
Resource type - Journals
eISSN - 2687-0908
pISSN - 2687-0894
DOI - 10.15593/2224-9826/2021.4.01
Subject(s) - karst , pile , geotechnical engineering , foundation (evidence) , geology , arch , bearing capacity , roof , soil water , structural engineering , engineering , soil science , paleontology , archaeology , history
When karst deformations are formed at the base of bridge supports, additional loads are transferred to the piles, and the bearing capacity of the base decreases. The article proposes methods for determining additional loads on the piles and the bearing capacity of piles, depending on the type of karst deformations. A method for numerical variation calculations based on the analysis of the change of shear stresses on the lateral surface of the piles at different stages of loading with the growth of a cavity in karst soils. The correct design model and criteria for evaluation the stability of the arch over the cavity were selected. A series of numerical calculations were performed. Analytical solutions to determine the additional load on the pile depending on the distance from the bottom of the pile to the roof of karst soils and the predicted diameter of the cavity in karst soils were obtained.