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

ZHANG Qiaolin; WU Jiaxin; YANG Dalong; GUO Lizhi; WANG Zhengyu; ZHAO Guangsi

doi:10.3724/j.gyjzG26032605

Volume 56 Issue 10

Oct. 2026

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2026 > 56(10): 198-205

ZHANG Qiaolin, WU Jiaxin, YANG Dalong, GUO Lizhi, WANG Zhengyu, ZHAO Guangsi. Simulation Study on Pile-Soil Displacement and Stress Distribution in the Composite Foundation of a 66 m-Diameter Spherical Coal Storage Silo[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(10): 198-205. doi: 10.3724/j.gyjzG26032605

Citation:

ZHANG Qiaolin, WU Jiaxin, YANG Dalong, GUO Lizhi, WANG Zhengyu, ZHAO Guangsi. Simulation Study on Pile-Soil Displacement and Stress Distribution in the Composite Foundation of a 66 m-Diameter Spherical Coal Storage Silo[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(10): 198-205. doi: 10.3724/j.gyjzG26032605

Citation:

ZHANG Qiaolin, WU Jiaxin, YANG Dalong, GUO Lizhi, WANG Zhengyu, ZHAO Guangsi. Simulation Study on Pile-Soil Displacement and Stress Distribution in the Composite Foundation of a 66 m-Diameter Spherical Coal Storage Silo[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(10): 198-205. doi: 10.3724/j.gyjzG26032605

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

doi: 10.3724/j.gyjzG26032605

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

Received Date: 2026-03-26
Available Online: 2026-11-06

Abstract

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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References(22)

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