The previous research results of the research group demonstrated that the plate position is the main factor affecting the uplift bearing capacity of the new type of concrete expanded plate pile (NT-CEP pile) group and the failure state of the soil around the pile. In this study, the visual half-section pile small-scale model of undisturbed soil tension test and ANSYS Finite Element Software comparative analysis two-pile small-scale test model and two-, four-, six-, and nine-pile models, which included the corner, side, and middle piles, were developed. The effect of the plate position on the displacement, stress, and bearing mechanism of the NT-CEP pile group under vertical tension was determined, which further improved the design concept of the NT-CEP pile group and provided strong theoretical support for its widespread application.

中文翻译：

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板块位置对NT-CEP群桩抗拔破坏状态及承载力的影响

课题组前期研究成果表明，板块位置是影响新型混凝土扩孔板桩（NT-CEP桩）群抗拔承载力及桩周土体破坏状态的主要因素。本研究采用原状土拉力试验可视化半节桩小型模型与ANSYS有限元软件对比分析二桩小型试验模型和二桩、四桩、六桩、九桩模型，其中包括角桩、边桩和中桩。确定了板位对竖向拉力作用下NT-CEP群桩位移、应力及承载机理的影响，进一步完善了NT-CEP群桩的设计理念，为其广泛应用提供了有力的理论支撑。