东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (6): 879-886.DOI: 10.12068/j.issn.1005-3026.2021.06.018

• 资源与土木工程 • 上一篇    下一篇

地上输料通道浅圆仓足尺装卸料试验及仿真分析

孙巍巍1， 冯君2， 毛风涛3， 汪晨晨1   

  1. (1. 南京理工大学 土木工程系， 江苏 南京210094； 2. 南京理工大学 瞬态物理国家重点实验室， 江苏 南京210094；3. 中国中材国际工程股份有限公司， 江苏 南京211100)
  • 修回日期:2020-06-23 接受日期:2020-06-23 发布日期:2021-06-23
  • 通讯作者: 孙巍巍
  • 作者简介:孙巍巍(1979-)，男，江苏淮安人，南京理工大学副教授.
  • 基金资助:
    国家自然科学基金资助项目(51308297，11902161)； 南京市建设系统科研项目(Ks1717).

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

SUN Wei-wei1， FENG Jun2， MAO Feng-tao3， WANG Chen-chen1   

  1. 1. Department of Civil Engineering， Nanjing University of Science and Technology， Nanjing 210094， China; 2. National Key Laboratory of Transient Physics， Nanjing University of Science and Technology， Nanjing 210094， China; 3. Sinoma International Engineering Co.， Ltd.， Nanjing 211100， China.
  • Revised:2020-06-23 Accepted:2020-06-23 Published:2021-06-23
  • Contact: FENG Jun
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摘要： 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.

关键词: 地上输料通道；浅圆仓；超压系数；仓壁；偏心卸料

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

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