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Título del libro: Proceedings Of The 7th International Conference On Engineering Computational Technology
Título del capítulo: Numerical analysis of a tunnel in very soft clay

Autores UNAM:
JUAN MANUEL MAYORAL VILLA; MIGUEL PEDRO ROMO ORGANISTA;

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Autores externos:

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Idioma:

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Año de publicación:
2010

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Palabras clave:

Constitutive models; Instrumentation; Numerical study; Settlements; Tunnel

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Resumen:

Construction of shallow tunnels in urban zones induces ground settlements that can cause differential displacements on nearby structures. In this paper, a numerical study of the static performance of a tunnel built in very soft clay, which exhibits high compressibility and low shear strength, is presented. The data gathered from the instrumentation of a 4 m diameter sewer tunnel was used in this study. Ground movements induced by the shield tunnelling throughout the soft clay was monitored by a number of deep and sallow settlement points and inclinometers. A cone penetration test was conducted at the site to obtain a distribution of the undrained shear strength with depth. In addition, the soil properties were also established from typical triaxial compression, triaxial extension and consolidation tests. A parametric study was conducted using several constitutive laws, including Mohr-Coulomb, modified Cam clay, and hyperbolic models, to asses their prediction capabilities. 2D and 3D finite difference models of the tunnel were developed. The vertical and horizontal displacements due to tunnelling were computed and compared with the data obtained from settlement points and inclinometers. The computed soil movements were in good agreement with the measured responses. From the numerical study, insight was gained regarding the static performance of this kind of underground structures. © 2010 Civil-Comp Press.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781905088393
Editorial:

Tipo de producto:
Conference Paper