ABSTRACT

Conventional pretensioned spun, high-strength concrete (PHC), pile head cutting process is associated with safety, quality uniformity, and labor productivity problems. However, trend analysis has revealed that no technology has been developed to address these problems as these pertain to specific Korean construction site situations. This study aims to derive the final detailed design for an all-in-one attachment-based PHC pile head cutting robot, and analyzes its structural stability. To this end, the key functions of an all-in-one attachment-based PHC pile head cutting robot have been defined, and the related core element technologies have been analyzed. This has led to the presentation of two detailed design alternatives. Both of these were then subjected to an analytical hierarchal process (AHP) and trade-off analysis that led to the final selection of the diamond wheel saw-based detailed design. In a structural stability analysis of the final detailed design, all tested parts did not surpass the threshold yield strengths of 230 MPa (SS400) and 255 MPa (AL6061 T6). If a prototype is developed based on the final detailed design derived in this study, it is expected to have improved work safety, quality uniformity, and work efficiency characteristics compared with the conventional PHC pile head cutting process.

摘要

传统的预拉伸纺丝、高强度混凝土 (PHC) 桩头切割工艺与安全性、质量均匀性和劳动生产率问题相关。然而，趋势分析表明，由于这些问题与韩国特定的建筑工地情况有关，因此尚未开发出任何技术来解决这些问题。本研究旨在推导出基于一体式附件的 PHC 桩头切割机器人的最终详细设计，并分析其结构稳定性。为此，定义了一种一体化的基于附件的PHC桩头切割机器人的关键功能，并分析了相关的核心要素技术。这导致了两种详细设计备选方案的介绍。然后对这两者进行分层分析过程 (AHP) 和权衡分析，最终选择基于金刚石砂轮锯的详细设计。在最终详细设计的结构稳定性分析中，所有测试部件均未超过 230 MPa (SS400) 和 255 MPa (AL6061 T6) 的阈值屈服强度。如果根据本研究得出的最终详细设计开发原型，与传统的 PHC 桩头切割工艺相比，它有望提高工作安全性、质量均匀性和工作效率特性。