Correction of Differential Settlements in Mexico City's Metropolitan Cathedral and Sagrario Church
Author(s): Efraín Ovando-Shelley, Enrique Santoyo
This book describes the geotechnical aspects for correcting the geometry of Mexico City´s Metropolitan Cathedral and of the adjoining Sagrario Church. It describes the main aspects of geotechnical conditions in the city and of the most important hazards affecting these monuments. It discusses the analyses performed and the actions taken to achieve the corrections required. The book aims to provide non-specialists with a clear picture of the magnitude and importance of the project and of the achievements it fulfilled. It is expected that the book will also appeal to specialized geotechnical engineers that will be provided with references to follow up the project in depth. The book will contain a large number of illustrations and will be written so as to provide "down to earth" explanations of the basic theories applied and of the actual construction procedures
The work will appeal to both students and professionals in the fields of Architecture and Civil Engineering. It will also interest specialized audiences of geotechnical engineers and conservation architects and it may also be of value to art historians.
"Mitigating [the] harmful effects of differential settlements" of subsoil is the focus of this work by Ovando-Shelley (National Autonomous Univ. of Mexico) and Santoyo (also UNAM, now deceased). This compelling book not only attests to the importance of built environments but also describes in detail the preventive and corrective actions—in this case, to subsoil—needed to enable their continued existence. The adjoining cathedral and church edifices have a long history of residing on unstable soil. In just 85 pages, 13 chapters and 4 appendixes, the authors concisely relay in retrospect the centuries of site construction and repair—beginning with Aztec temples built on an islet in the middle of a lake in 1325. They discuss the soil remediation techniques that have been necessary over time and elaborate on current methods of underexcavation, such as subsoil hardening through mortar grouting and pore-water recharge. The geotechnical diagnosis and geometrical corrections are explained in meticulous detail, and the information has significance for worldwide preservation efforts. Beautiful color and black-and-white illustrations, including photos, diagrams, and plans, enhance the remediation and restoration discussions. This powerful presentation demonstrates not only the importance of historic buildings to community but also the value of retaining them and doing so with modern technology. A superb acquisition for every technical library.
Summing Up: Highly recommended. Lower- and upper-division undergraduates. Graduate students, faculty and professionals. Students enrolled in two-year technical programs.
L.B. Allsopp (Arizona State University) in CHOICE, December 2020, Vol. 58, No. 4