66 m大直径球形储煤仓复合地基桩土位移及应力分布规律模拟研究

张乔林; 吴佳欣; 杨大龙; 郭立志; 王正宇; 赵光思

doi:10.3724/j.gyjzG26032605

66 m大直径球形储煤仓复合地基桩土位移及应力分布规律模拟研究

doi: 10.3724/j.gyjzG26032605

1. 中煤西安设计工程有限责任公司, 西安 710054;
2. 煤炭无人化开采数智技术全国重点实验室, 北京 100120;
3. 中国矿业大学力学与土木工程学院, 江苏徐州 221116;
4. 中国矿业大学深地工程智能建造与健康运维全国重点实验室, 江苏徐州 221116;
5. 徐州工业职业技术学院建筑工程学院, 江苏徐州 221140

详细信息

作者简介:
张乔林,高级工程师,主要从事结构工程方向的研究。电子信箱:357618972@qq.com

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出版历程
- 收稿日期: 2026-03-26
- 网络出版日期: 2026-11-06

Simulation Study on Pile-Soil Displacement and Stress Distribution in the Composite Foundation of a 66 m-Diameter Spherical Coal Storage Silo

1. China Coal Xi'an Design Engineering Co., Ltd., Xi'an 710054, China;
2. State Key Laboratory of Digital Intelligent Technology for Unmanned Coal Mining, Beijing 100120, China;
3. School of Mechanics and Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China;
4. National Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Earth Engineering, China University of Mining and Technology, Xuzhou 221116, China;
5. School of Architecture and Civil Engineering, Xuzhou Vocational College of Industrial Technology, Xuzhou 221140, China

摘要

摘要: 以陕西榆林某球形储煤仓为研究对象，针对大直径球形储煤仓环形基础下复合地基位移和应力分布规律尚不明确的难题，运用FLAC^3D数值模拟软件，分析上部结构自重作用下复合地基桩土位移及应力分布规律。为保证计算效率和准确性，模型采用Pile单元模拟群桩基的建模方法。结果表明：桩身在全长范围内竖向位移分布较为一致，表现出良好的竖向变形协调能力，有效抑制了不均匀沉降风险；弹性-塑性耦合机制下，桩身可实现荷载向深层均匀传递，提升承载性能。基于此差异化配置8，15，18 m多种桩长，有效引导桩身弯矩向深层转移并在多个位置分散，降低最大弯矩水平的同时节省约12.1%工程造价。通过对不同位置、不同长度桩体的轴力与弯矩特征分析，为抗弯设计校核、施工监测布点与荷载工况下风险预警提供了关键依据。
- 复合地基 /
- 大直径球形储煤仓 /
- FLAC^3D /
- Pile单元 /
- 长短桩
Abstract: This study investigated a spherical coal storage silo located in Yulin， Shaanxi Province， focusing on the unclear characteristics of displacement and stress distribution in the composite foundation beneath the ring-shaped base of the large-diameter spherical silo. FLAC^3D numerical simulation software was employed to analyze the displacement and stress distribution behavior of the pile-soil system in the composite foundation under the self-weight of the superstructure. To ensure both computational efficiency and modeling accuracy， the pile group was simulated using the Pile element method. The results indicated that the vertical displacements along the full length of the piles were relatively uniform， demonstrating good vertical deformation coordination and effectively mitigating the risk of differential settlement. Through an elastic-plastic coupling mechanism， the pile shaft redistributed vertical loads uniformly to deeper soil layers， enhancing bearing performance. The differentiated configuration of 8 m， 15 m， and 18 m piles effectively shifted the bending moment of the pile shaft to greater depths and dispersed it among multiple locations， reducing the peak bending moment while achieving approximately 12.1% savings in construction cost. Furthermore， the analysis of the axial force and bending moment distributions of piles at different locations and with different lengths provided reliable data for bending resistance design verification， guided monitoring point layout during construction， and offered a key reference for early risk warning under various loading conditions.
- composite foundation /
- large-diameter spherical coal storage silo /
- FLAC^3D /
- Pile element /
- long and short piles

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