Cut-Off Wall and Refoundations after 2017 Earthquake in Abrupt Variation Zone, Xochimilco, Mexico City
Publication: Geo-Congress 2023
ABSTRACT
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.
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REFERENCES
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Information & Authors
Information
Published In
Geo-Congress 2023
Pages: 563 - 577
History
Published online: Mar 23, 2023
ASCE Technical Topics:
- Bodies of water (by type)
- Business management
- Case studies
- Construction engineering
- Construction methods
- Core walls
- Developing countries
- Diaphragm walls
- Earthquakes
- Engineering fundamentals
- Geohazards
- Geomechanics
- Geotechnical engineering
- Lakes
- Methodology (by type)
- Practice and Profession
- Rehabilitation
- Research methods (by type)
- Soil dynamics
- Soil mechanics
- Soil settlement
- Structural engineering
- Structural members
- Structural systems
- Walls
- Water and water resources
- Water management
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