地上输料通道浅圆仓足尺装卸料试验及仿真分析

为了研究地上输料通道浅圆仓的仓壁和通道压力分布和演化规律，开展了足尺筒仓装卸料试验及仿真分析.研究表明通道的存在影响了仓壁底部侧压力分布，通道压力与其正上方的贮料实际高度相关.朗肯主动土压力系数更适合预测仓壁和通道的侧压力.隧道的深埋浅埋判定依据并不适用于贮料拱效应不明显的浅圆仓输料通道，公路隧道规范和太沙基理论预测的通道顶壁压力与实仓测试值相差甚远，而采用提出的基于浅埋理论的通道压力计算公式更为合理安全.主、次通道顶壁和侧壁偏心卸料过程中均呈现不同程度的超压现象，建议在浅圆仓通道卸料荷载计算时应适当考虑通道的超压系数.

Full Scale Loading and Unloading Test and Simulation on Squat Silo with Ground Conveying Corridor

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.