Behavior of a Skirt-Type Foundation for a Metro Railroad Overpass on the Mexico City Soft Clay, During the M-w 8.2 Gulf of Tehuantepec Earthquake, on September 7th 2017
Por:
Mendoza, Manuel J., Mendoza, Salvador A., Rufiar, Miguel
Publicada:
1 ene 2019
Resumen:
Line 12 of the subway system (Metro) connects the southeast and the
southwest zones of Mexico City. Along its length of 25 km different
solutions were used such as tunnels, box-type foundations, superficial
tracks and viaducts. The railroad overpass crosses a zone with soft clay
subsoil having low shear strength and high compressibility. Some of the
supports in this zone were founded upon using an innovative solution. It
is constituted by four cast-in-place peripheral concrete walls with
thickness of 60 cm and length of 10.5 m, forming in plan a square of 6.5
m on each side. These walls are connected to a prefabricated concrete
footing-column monolithically cast to support the superstructure. This
skirt-type foundation is locally known as ``inverted glass'' or
``structured cell''. Description is made in this paper of the dynamic
behavior of support ZP-16 having this type of foundation, based on its
measured geotechnical variables and accelerations recorded during the
M-w 8.2 earthquake occurred on September 7, 2017, with epicenter in the
Gulf of Tehuantepec. No damage occurred in the system. The time series
of the geotechnical variables monitored during this earthquake indicate
transient cyclic processes.
Filiaciones:
Mendoza, Manuel J.:
Univ Nacl Autonoma Mexico, Coordinac Geotecnia, Inst Ingn, Mexico City, DF, Mexico
Mendoza, Salvador A.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico
Rufiar, Miguel:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico
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