There is a continuous increase in the size and importance of tunnels made in connection with public works, such as motor roads, and water supply systems, and also in other fields of engineering. The author reviews the new machinery now being used to excavate full section tunnels. He studies the various types of Jumbo machinery, helicoidal screw drilling equipment. Tunnellers, and similar devices, and their suitability in various types of rock. A description is given of projects where such equipment has been utilized, and the results are evaluated. Finally, the article deals with modern type hydraulic breaking super hammers, used in rock drilling.Cada día es mayor el número y la importancia de los túneles que se realizan tanto en el sector...
El presente trabajo tiene por objeto estudiar dentro de los minerales de litio locales al espodumeno...
The extracion and crushing of stone material in La Mina Ambato, Nieto and Kumochi Uno, canteras they...
En los últimos años, se ha incrementado notablemente la búsqueda de nuevos yacimientos de petróleo y...
The outstanding progress in recent years in the field of public works is basically due to the massiv...
The hydraulic development of Cère II is an important engineering project, that is being exploited by...
In this article an analysis is made of several interesting results obtained by the use of nonstop dr...
The drilling of large underground tunnels, either for mines or public works, should be approached ac...
El diseño de grandes taludes en roca, como los que se desarrollan en minas a cielo abierto,canteras ...
This article describes a new construction procedure for the provisional and permanent lining of tunn...
This article studies the most outstanding characteristics of continuous boring machines and their dr...
The new tunnel under Boston harbour has been constructed because of the insufficient capacity of a s...
“El avance tecnológico y desarrollo de nuevas plataformas que permiten reducir los impactos ambienta...
En el presente trabajo, se afrontarán importantes problemáticas en el ámbito de la geotecnia, las cu...
Ante la rápida declinación de las reservas tradicionales de hidrocarburos, la industria energética m...
When it was decided by the local authorities and the Emosson, S. A., electricity firm to build an ac...
El presente trabajo tiene por objeto estudiar dentro de los minerales de litio locales al espodumeno...
The extracion and crushing of stone material in La Mina Ambato, Nieto and Kumochi Uno, canteras they...
En los últimos años, se ha incrementado notablemente la búsqueda de nuevos yacimientos de petróleo y...
The outstanding progress in recent years in the field of public works is basically due to the massiv...
The hydraulic development of Cère II is an important engineering project, that is being exploited by...
In this article an analysis is made of several interesting results obtained by the use of nonstop dr...
The drilling of large underground tunnels, either for mines or public works, should be approached ac...
El diseño de grandes taludes en roca, como los que se desarrollan en minas a cielo abierto,canteras ...
This article describes a new construction procedure for the provisional and permanent lining of tunn...
This article studies the most outstanding characteristics of continuous boring machines and their dr...
The new tunnel under Boston harbour has been constructed because of the insufficient capacity of a s...
“El avance tecnológico y desarrollo de nuevas plataformas que permiten reducir los impactos ambienta...
En el presente trabajo, se afrontarán importantes problemáticas en el ámbito de la geotecnia, las cu...
Ante la rápida declinación de las reservas tradicionales de hidrocarburos, la industria energética m...
When it was decided by the local authorities and the Emosson, S. A., electricity firm to build an ac...
El presente trabajo tiene por objeto estudiar dentro de los minerales de litio locales al espodumeno...
The extracion and crushing of stone material in La Mina Ambato, Nieto and Kumochi Uno, canteras they...
En los últimos años, se ha incrementado notablemente la búsqueda de nuevos yacimientos de petróleo y...