Fundação profunda do tupo estaca raiz: estudo de caso do processo executivo em uma obra de fundação localizada no Município de Rio Verde-GO

Abstract

This Final Undergraduate Thesis addresses the deep foundation technique known as root pile, emphasizing its practical application in a construction project located in Rio Verde, Goiás, Brazil. This technique is extensively employed in soils with low bearing capacity or in scenarios involving shallow rock outcrops, particularly in sites with limited access or vibration restrictions, ensuring structural stability and safety. The primary objective was to analyze the execution process of the root pile, identify its advantages and limitations, and assess its applicability within the specific context of the project studied. The methodology adopted combined theoretical and practical approaches, including a comprehensive literature review, collection, analysis, and interpretation of geotechnical and design data, alongside systematic field monitoring of the construction phases. A total of 77 root piles with 50 cm diameter and 11 meters depth were designed and installed in critical zones of the structure, such as elevator shaft foundations and areas with elevated structural loads, while the remainder of the foundation comprised 314 monitored continuous flight auger (CFA) piles of 8 meters depth. The study documented all execution stages, from site surveying and drilling to reinforcement cage installation, grout preparation and injection, concreting, and casing extraction. The analysis demonstrated that despite a lower installation rate, root piles exhibit superior technical performance in soils with rock presence and complex geotechnical conditions, proving essential for the technical feasibility and structural integrity of the project. Consequently, it is concluded that selecting the appropriate foundation system based on detailed geotechnical investigation is critical to the success of foundation engineering works. This study contributes significantly to both academic and professional fields by providing valuable insights and practical references for the design and execution of deep foundations under challenging geotechnical conditions, serving as a pertinent resource for students, engineers, and professionals involved in foundation engineering.