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Título del libro: Geotechnical Engineering In The Xxi Century: Lessons Learned And Future Challenges
Título del capítulo: Numerical Modeling and Performance of Two Test Embankments Based on Surcharge Preloading, PVDs and Vacuum: Drain-to-Drain and Airtight Membrane

Autores UNAM:
NORMA PATRICIA LOPEZ ACOSTA; ENRIQUE MARTINEZ HERNANDEZ;

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Autores externos:

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Idioma:

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Año de publicación:
2019

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Palabras clave:

Soil improvement; vacuum preloading; drain-to-drain; airtight membrane

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Resumen:

The soft soils, characterized by their high water content, high compressibility, low resistance to shear and low permeability, need to be stabilized before the construction of the buildings they will support. The purpose of this stabilization is to prevent differential settlements and/or unacceptable collapses in buildings that can affect their operation or endanger the safety of the structures or the people who inhabit them. A simple preload system with vertical drains is an option for the stabilization of soft soils. This technique usually consists of representing the weight of a structure by means of an embankment of earth material and complementing it with vertical drains to induce settlement in a shorter time. Another option to generate a preload in the soil is through the application of vacuum pressure in the surface layers. The vacuum pressure is transmitted to the ground through prefabricated vertical drains (PVDs) by two techniques: drain-to-drain or with an airtight membrane. In this paper, the behavior of two test embankments built in the area of the former Lake Texcoco (where the construction of a new airport was planned) with a preload solution combined with PVDs and vacuum consolidation using drain-to-drain and airtight membrane technologies is studied using numerical modeling and field instrumentation.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781643680316
Editorial:
IOS PRESS

Tipo de producto:
Proceedings Paper

DOI:
10.3233/STAL190286