The axial and lateral monotonic and cyclic behavior of helical pile foundations was investigated and new helical screw systems suitable for seismic loadings were developed. More than one hundred full scale field load tests were conducted on instrumented helical ...

The paper demonstrates the application of a hypoplastic model in class A predictions of a NATM tunnel in an urban environment. The tunnel, excavated in a stiff clay, is 14 m wide with 6 m to 21 m of overburden thickness. The constitutive model was calibrated ...

The paper demonstrates the application of a hypoplastic model in class A predictions of a NATM tunnel in an urban environment. The tunnel, excavated in a stiff clay, is 14 m wide with 6 m to 21 m of overburden thickness. The constitutive model was calibrated ...

<p>Due to the complexity of excavation and groundwater seepage, the behavior of foundation pits is not yet well understood. In this paper, based on three-dimensional (3D) Biot&rsquo;s consolidation theory and nonlinear Duncan-Chang&rsquo;s model, finite element ...

The paper presents comparison of 2D and 3D analyses of an exploratory adit of a NATM tunnel in stiff clays using two constitutive models (hypoplastic model for clays and Mohr-Coulomb model). The stress-release factor β of 2D simulation has been optimised to ...

The Molycorp, Inc., Questa Mine, located in New Mexico, currently mines using a gravity-draw panel cave to extract molybdenum sulfide ore from the 600-m-deep D Orebody. Prior to initial development, geotechnical studies were undertaken to predict ground response ...

This paper describes the formulation of elements to connect finite element meshes of differing dimensionality. The formulation employs minimization using Lagrange multipliers. While this technique is already described in many texts, this paper demonstrates ...

<p>An analysis of a case history of settlement damage to a masonry building, due to the construction of a nearby shaft, is presented. Three-dimensional finite element analysis is used, in which the non-linear behavior of both the soil (a heavily overconsolidated ...

<p>In the course of the extension of a metro line in Vienna the station Taborstra&szlig;e will be built. Two single track platform tunnels, a connection tunnel and an elevator tunnel will be driven through sediments following an NATM excavation scheme with ...