The increments of the internal forces induced by an earthquake in the transverse section of a tunnel lining can be ascribed to the ovalisation of the section, induced by soil shear straining in the vertical plane. They can be assessed with several procedures ...

Buried tunnels with circular cross section, such as urban undergrounds are very popular in transportation engineering. The seismic behavior of such structures during operation is of importance. There exist different closed form solutions, such as Penzien and ...

<p>The state of art of tunnel earthquake damages and tunnel earthquake damage mechanism are briefly introduced in this paper. According to tunnel&rsquo;s traffic function and damage descriptions based on the investigation, tunnel damages are divided into five ...

This thesis deals with the model accuracy for seismic design of immersed tunnels, like the proposed underwater artery in Thessaloniki, Greece. The soil response to seismic waves is analysed in the frequency domain by means of the domain transformation method ...

Construction of the Canada Line Rapid Transit Project is currently underway in Vancouver, BC. The 19 km rapid transit system includes 6.6 km of cut and cover box structure – one of the longest cut and cover rapid transit tunnels in Canada. The design for the ...

An effective seismic retrofit for a sidewall of a cut and cover tunnel has not been established yet. We develop a new method of seismic retrofit for the cut and cover tunnel. We call this “polymer isolation method.” In this method, we insert a thin wall made ...

<p>Critical for the seismic safety of immersed tunnels is the magnitude of deformations developing in the segment joints, as a result of the combined longitudinal and lateral vibrations. Analysis and design against such vibrations is the main focus of this ...

Severe damage to six out of a total of 21 subway stations in the Kobe area during the 1995 Hyogoken-nanbu earthquake indicated a need for more attention to be given to the earthquake design of rectangular underground structures. This paper presents work undertaken ...

This paper presents a new concept of the seismic countermeasure for a structurally special part of tunnel such as ramp of road tunnel and a crossover of double-truck railway tunnel, in which a flat and large cross-sectional tunnel and a junction of tunnels ...

<p>Underground facilities are an integral part of the infrastructure of modern society and are used for a wide range of applications, including subways and railways, highways, material storage, and sewage and water transport. Underground facilities built in ...