Calculation and Application of Ultimate Lateral Friction Resistance of Concrete Piles under Different Soil Layer Materials

Abstract:

In practical engineering applications, it usually gets the expected value of the ultimate side friction of concrete piles by the empirical parameter method. The expected value of the ultimate side friction of concrete piles cannot achieve maximum optimization due to the complexity of formation conditions and the lack of experience of technicians. To accurately obtain the ultimate lateral friction resistance of piles in homogeneous soil layers, optimize the standard value of pile ultimate lateral resistance, ensure construction safety, and save construction costs, the research method combining theoretical derivation and on-site measurement data validation was done in the manuscript. Based on the shear strength of the pile-soil interface of different materials and the shear performance of the soil around the pile, a calculation equation for the standard value of the ultimate lateral friction resistance of concrete piles in different homogeneous soil materials was derived and applied to the equation for calculating the ultimate bearing capacity of foundation pile and the axial force of pile. Finally, based on an engineering example, the calculated results were compared with the measured resultsThe research results show that in thick coarse-grained soil, as the foundation pile is short, the ultimate bearing capacity of a single pile obtained using the calculation equation deduced in this paper is less than that obtained using the empirical equation provided by the national code. In a deep cohesionless homogeneous soil material, the concrete pile shaft axial force calculation using the pile shaft axial force calculation equation deduced in this paper is close to the measured value when the foundation pile bears the ultimate load; the proposed new method has good application value.

• Periodical: Key Engineering Materials (Volume 972)
• Pages: 153-163
• DOI: https://doi.org/10.4028/p-1aRbOp
• Online since: December 2023
• Authors: Jian Bin Chen, Zhou Jun, Li Peng Wu, Liu Jie*, Ding Xin Peng, Wei Guo Zheng, Ya Qiong Qing, Yong Hua Xiong, Yong Dong, Xiang Wang
• Keywords: Axial Force of Pile, Cohesion Less Soil, Shear Strength, Soil Layer Materials, Ultimate Bearing Capacity of the Pile, Ultimate Side Friction

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