Geotechnical instrumentation in large-diameter access shafts

René Contreras Galván, Mario Trigo Lara, Iván Rivera Cruz

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Buried Structures & Subsurface Systems

ABSTRACT: The Eastern Sewage Tunnel (TEO) will be part of Mexico City´s drainage system. It will be more than 62 km long at depths varying from 32 to 148 m. It will traverse different kinds of soils most of which are the product of depositions in a lacustrine environment. The tunnel required the construction of access shafts having diameters ranging from 12 to 16 m. This paper describes the geotechnical instrumentation installed in the deepest shaft (L-20); it also describes the results of the initial measurements.

RESUMEN: El Túnel Emisor Oriente (TEO) será parte del sistema de drenaje de la Ciudad de México. Tendrá más de 62 km de longitud y profundidades de 32 a 148 m. En su desarrollo atravesará diversos tipos de suelo, la mayoría productos de depósitos en ambiente lacustre. El Túnel requiere la construcción de lumbreras de acceso con diámetros de 12 a 16 m. Este artículo describe la instrumentación geotécnica instalada en la lumbrera más profunda (L-20), así como los resultados de las primeras mediciones.

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