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Delhi Metro-Tunnels and Stations on the 11 km underground metro corridor
LOKASI: Ruang Koleksi Umum Rak2
Hydraulic fracturing stress measurements for the design of underground de-sil…
Lokasi: Ruang Koleksi Umum
UNDERGROUND INFRASTRUCTURE : Planning, Design, and Construction
LOKASI: Ruang Koleksi Umum Rak: 2
The particle size distributions of debris produced during tunnelling trials
This report presents data on the particle size distributions of debris and the amounts of energy expended while cutting chalk with drag picks and disc cutters during the tunnelling trials at Chinnor, Oxfordshire. Samples of debris were sieved and generalised relations were found between the coarseness index and the specific energy values. However there was considerable scatter in the results mu…
ultrasonic wave propagation in discontinous rock
Experiments were carried out to determine the effect of discontinuities on the propagation of ultrasonic waves in samples of chalk and sandstone obtained from tunnel sites at Chinnor, Oxfordshire and Warrington, Cheshire respectively. In particular the effect of normal stress across a closed discontinuity was investigated. Tests to determine the wave velocity, attenuation coefficients and the e…
