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Stability analysis of free surface of soil between piles in fabricated recyclable foundation pit supporting structure

被引：0
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作者：
Chen L.-C. [1 ,2 ,3 ,4 ]
Lin P.-Y. [1 ,2 ,3 ,4 ]
Guo C.-C. [1 ,2 ,3 ,4 ]
Wang F.-M. [1 ,2 ,3 ,4 ]
机构：
[1] School of Civil Engineering, Sun Yat-sen University, Guangzhou
[2] Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai
[3] Guangdong Provincial Key Laboratory of Oceanic Civil Engineering, Sun Yat-sen University, Guangzhou
[4] Guangdong Provincial Research Center for Underground Space Exploitation Technology, Guangzhou
来源：
Guo, Cheng-Chao (guochch25@mail.sysu.edu.cn) | 1600年 / Academia Sinica卷 / 41期
关键词：
Finite element limit analysis; Foundation pit support; Limit equilibrium; Soil between piles; Stability;
D O I：
10.16285/j.rsm.2020.0914
中图分类号：
学科分类号：
摘要：
The stability of the free surface of the soil between the piles is of great significance for the engineering application of the assembled recyclable foundation pit support structure. In this paper, based on the calculation model of wedge-shaped body and the Terzaghi's theory on loosening earth pressure, considering the interaction between the soil and the pile-slab, the calculation formula of the ultimate supporting pressure of the free surface of the soil between the piles is derived from the limit equilibrium condition of the sliding mass. The calculated ultimate supporting pressure is compared with the numerical simulation results of three-dimensional finite element limit analysis to verify the rationality of the calculation method. The simple variable method was used to analyze the effects of soil internal friction angle φ, interface friction angle between soil and plates/piles δ, ground overload P0, spacing between piles B, relative excavation depth H/D, and unloading arch angle β on the ultimate support pressure. The research results can provide a theoretical basis for the soil support between the piles in the pile-slab support structure. © 2020, Science Press. All right reserved.
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页码：299 / 305
页数：6
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