<p>TBM tunneling is an ever-increasing prospect for underground construction, and with each new tunnel bored there are unknown elements. When boring through the earth, even extensive Geotechnical Baseline Reports can miss fault lines, water inflows, squeezing ...

<p>The flow of bentonite and grout around a TBM influences the settlement trough that is created during TBM tunneling. Not taking into account this flow, leads to a calculated settlement trough that is too deep. Two calculation methods have been developed: ...

<p>Natural gases are a potential hazard in construction of underground excavations. Encountering with gases usually result in costly delays. Gases occur in a wide variety of geological conditions, so predict the occurrence of potentially hazardous concentrations ...

<p>The Kowloon Southern Link (KSL) is a 3.8 km underground railway project in a busy urban area with complex geological and alignment constraints.A key challenge for the project is to construct a critical section of the tunnels above the existing MTR tunnels ...

Specific correlations developed to predict the Rate of Advance for open TBMs, double-shields and single-shields, using the RME index are presented.

<p>In the paper problems related with the execution of 29m deep excavation of Nowy Swiat Station (S11) of 2nd metro line inWarsaw are discussed. In the central section,Warsaw 2nd metro line runs below the center of the city (office and housing buildings and ...

<p>Modelling tunnel boring machine (TBM) performance is an important aspect in tunnel operations. The use of artificial intelligence techniques such as artificial neural networks has been recently introduced to this subject and the results from such applications ...

<p>This General Report reviews a total of twenty five papers relating to bored tunnel construction, its influence on ground deformations and tunnel interaction with other geo-structures in the 5th International Symposium on GeotechnicalAspects of Underground ...

Three tunnels for hydraulic purposes were excavated by tunnel-boring machines (TBM) in mostly hard metamorphic rocks in Northern Italy. A total of 14km of tunnel was surveyed almost continually, yielding over 700 sets of data featuring rock mass characteristics ...

An engineering geological assessment with respect to the TBM excavation, within a highly heterogeneous system of formations known as the "Athens Schist" is presented. The method considers mainly the rock mass competence on the basis of criteria related to ...