Effect of structures density and tunnel depth on the tunnel-soil-structures dynamical interaction

Abstract

This paper studies the presence effects of two or more adjacent structures on the tunnel responses and vice versa due to surface and underground traffic loads. The study is numerically carried out by using Finite element Plaxis2D software©. The obtained results demonstrate that the dynamical interaction between the tunnel and the structures is significantly influenced by varying the number and distance between the adjacent structures, the depth of the tunnel and the location of the traffic load. These results can be considered and used in realistic and practical cases and also to help build efficient and more comfortable construction projects.

Tunnel-Soil-Structures Interaction Effect due to Seismic Loading

“…The effects of the physical and mechanical characteristics of the structures and the soil, the position and the number of the adjacent structures as well as the distance of the separation between them were also taken into account in many studied cases. On the other hand, the type of applied dynamical impact (surface traffic, underground traffic, rotating machine, earthquake...) and its location as to the studied structures systems play a major role in determining the behaviour of the dynamic response [10,11]. Most of the works in the literature confirm the importance of accurately describing and modelling the surrounding urban environment in structure-soil-structure interaction analyses, in order to understand the future influence of increasing urbanization on seismic hazard in populated areas.…”

“…Several researchers mention the negative effects of SSSI, other researchers indicate the positive effects of SSSI on the response of the structures. Nevertheless, numerous researchers note that the effect of SSSI can increase or decrease the response of the structures depending on the circumstances considered [8,[10][11][12][13][14]. For exemple, the presence a tunnel under a building can have a significant effects on the interaction between the tunnel, soil, and structure.…”

Comparison between Ramberg-Osgood and Hardin-Drnevich soil models in Midas GTS NX

“…However, the progressive development in computer technology accompanied with the increasing speed of processing complex calculations allowed the use of numerical modeling for easier and faster calibration of models for further use in real and much more complicated geotechnical problems (e.g. deep foundation [1][2] and tunnels [3] modeling). In this study, the Ramberg-Osgood and the Hardin-Drnevich models were used to predict and simulate the soil behavior in the TOrsional Simple Shear (TOSS) test, and the results were compared with test data for irregular loading patterns.…”

Modeling of stress-strain relation of cement-treated sand under compression

“…Complex structures are modeled worldwide by researchers using the Finite Element Method (FEM) [8]. Finite element analysis was used to study the tensile strain rate effect of cementitious materials [9].…”