Abstract: In order to study the pressure distribution and evolution of the wall and the corridor in the squat silo with ground conveying corridor， a full-scale silo loading and unloading test and simulation were carried out. It was found that the pressure distribution at the bottom of the wall is affected by the existence of the corridors. The pressure of the corridor is related directly to the actual height of the stored material above it. Rankine’s coefficient of active earth pressure is more suitable to predict the lateral pressure on the wall and the corridor. The basis for distinguishing the deep and shallow buried tunnels is not applicable to the conveying corridor in the squat silo where the arch effect of the stored material is not obvious. The predicted value of the top wall pressure on the corridor according to highway tunnel code and Terzaghi’s theory is far from the actual test value. It is more reasonable and safer to use the corridor pressure calculation formula proposed in this paper based on the shallow buried theory. There are different degrees of overpressure on the top wall and the side wall of the main and secondary corridors during eccentric discharge. It is recommended that the overpressure coefficient of the corridors should be properly considered when calculating the discharge load in squat silos.

Key words: ground conveying corridor; squat silo; overpressure coefficient; silo wall; eccentric discharge