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Cut-Off Wall and Refoundations after 2017 Earthquake in Abrupt Variation Zone, Xochimilco, Mexico City
The 2017 Mexico earthquake had a high impact on the banks of the old lake of Mexico Valley, in which the spectral acceleration was amplified by site effects. The case study explains the retrofitting of a pharmaceutical building complex in Xochimilco, Mexico City, developed between 2018 and 2019. The buildings have a problem of excessive deformability with relevant non-structural damages during seismic events. The plant is located in an abrupt variation zone on the banks of the old lake, where geotechnical and a geophysical survey identified a soil fracture due to regional subsidence, producing differential settlements, accelerated by the seismic activity. The retrofitting actions involved structural and geotechnical works, including a cut-off wall in order to reduce the flow of underground water, and soil improvement with rootpiles and micropiles. Deformability problems were solved by increasing the structure stiffness, and re-foundation with micropiles. Custom bentonite-cement mix was designed to guarantee the permeability values.
Cut-Off Wall and Refoundations after 2017 Earthquake in Abrupt Variation Zone, Xochimilco, Mexico City
The 2017 Mexico earthquake had a high impact on the banks of the old lake of Mexico Valley, in which the spectral acceleration was amplified by site effects. The case study explains the retrofitting of a pharmaceutical building complex in Xochimilco, Mexico City, developed between 2018 and 2019. The buildings have a problem of excessive deformability with relevant non-structural damages during seismic events. The plant is located in an abrupt variation zone on the banks of the old lake, where geotechnical and a geophysical survey identified a soil fracture due to regional subsidence, producing differential settlements, accelerated by the seismic activity. The retrofitting actions involved structural and geotechnical works, including a cut-off wall in order to reduce the flow of underground water, and soil improvement with rootpiles and micropiles. Deformability problems were solved by increasing the structure stiffness, and re-foundation with micropiles. Custom bentonite-cement mix was designed to guarantee the permeability values.
Cut-Off Wall and Refoundations after 2017 Earthquake in Abrupt Variation Zone, Xochimilco, Mexico City
Jiménez Ontiveros, Eloy (author) / Arévalo Amezcua, Juan D. (author) / Blanco, Francisco J. (author)
Geo-Congress 2023 ; 2023 ; Los Angeles, California
Geo-Congress 2023 ; 563-577
2023-03-23
Conference paper
Electronic Resource
English
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