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

作     者：Chen, Li-Chao Lin, Pei-Yuan Guo, Cheng-Chao Wang, Fu-Ming 

作者机构：School of Civil Engineering Sun Yat-sen University Guangzhou 510275 China Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai 519080 China Guangdong Provincial Key Laboratory of Oceanic Civil Engineering Sun Yat-sen University Guangzhou 510275 China Guangdong Provincial Research Center for Underground Space Exploitation Technology Guangzhou 510275 China 

出 版 物：《Yantu Lixue/Rock and Soil Mechanics》 (Rock and Soil Mechanics)

年 卷 期：2020年第41卷

页      面：299-305页

核心收录：

学科分类：08[工学] 081401[工学-岩土工程] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0814[工学-土木工程] 0823[工学-交通运输工程] 

基　　金：This work was supported by the Major Project of China State Railway Group Co.  Ltd. Science & Technology Research and Development Program (K2019G032)  the Henan Major Science & Technology Projects(181100310400)  and Key Consulting Project of China Academy of Engineering(2019-XZ-66). 

主　　题：Piles 

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.