Estudio patológico muros pantalla intercambiador vial calle 72 con Av. Caracas

Abstract

The first line of the Bogotá Metro (PLMB) is conceived as the main project to solve the city's mobility issues. It consists of a 24-kilometer viaduct that crosses an important arterial road with heavy traffic flow, such as Calle 72 with Av. Caracas. To avoid interrupting its operation, a traffic solution was necessary, requiring the construction of an underpass for mixed traffic lanes traveling east to west and vice versa along Calle 72. This underpass must support traffic loads both in its depressed section and on its upper part, where mixed traffic, Transmilenio, and the PLMB viaduct will operate. The structural design proposes the construction of pre-excavated diaphragm walls cast in situ as the main structure, supported by plate bracing elements and lower and upper strut beams. During the construction phase, when creating the lower bracing elements, the diaphragm walls were uncovered, revealing pathologies due to soil properties, quality defects, and poor construction practices. These issues were identified through visual inspection, photographic records, damage reports, and technical tests, which confirmed that the damages are not detrimental to the structural functionality of the elements and do not compromise structural safety, stability, or durability. The identified pathologies are considered pediatric due to the structure's age, with the premise of being quickly repaired to meet contractual deadlines and be made available to the community and nearby businesses. Therefore, it is imperative to provide an effective therapeutic solution that minimizes structural damage through a thorough examination of the origin of the damages. It was concluded that although the damages can be treated with a corrective process, their presence in the structure does not affect its safety, stability, integrity, functionality, or durability.