Keywords MASS RAPID TRANSIT CORP MASS TRANSIT, RAPID TRANSIT, SYSTEMS, CONSTRUCTION, RAILWAYS, COUNTRIES, DEVELOPING, LEGISLATION, GROUND, CONDITIONS, METHODS, EQUIPMENT, UNDERGROUND, STATIONS, TUNNELS, WORKS, CITIES, CUT AND COVER, TUNNELLING, SUPPORTS, EXCAVATING, UNDERWATER, BORED, MACHINERY, GREATHEAD, SHIELDS, HAND, COMPRESSED, AIR, AIDS, MEDICAL, SUPERVISION, VIADUCTS, LAUNCHING, GANTRIES, CONTRACTORS, ELEVATED, DEPOTS, FOUNDATIONS, PROBLEMS, TECHNIQUES, TRACK, LAYING, RATES, PERMANENT WAY, GEOLOGY, SETTLEMENT, PILING, PRECASTING, YARDS, BEAMS, CASTING, CONCRETE, QUALITY, C SINGAPORE SINGAPORE, ASIA... Show All
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Hulme et al. (1989) studied this question.
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