Word: subsoil
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Dates: during 1960-1969
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...Millions visiting Canada's Expo 67 thought they saw the world's most beautiful subway. Now there is a challenger. Who is the builder, and how does he make his subway "float" in an almost liquid subsoil? (See BUSINESS...
That shape, and the ingenious engineering that made the project feasible, is the handiwork of Mexico's largest builder, Bernardo Quintana. His box tunnel literally floats like a ship on subsoil that is 80% water. The trick was to remove precisely the right weight of soil and water without undermining buildings alongside the right of way. To do so, Quintana first built sidewalls for a trench, then removed the muck between them through a complex electroosmosis process of his own devising. The roof to form a tunnel came last. By the time the whole subway is completed in November...
...what dark subsoil our life is built...
...eight-lane Inner Belt highway. There was no surprise in the announcement; the DPW has long favored Brookline-Elm. Construction will be cheaper and easier -- had the alternate route been chosen, the department would have had to make extra efforts to stabilize the highway in the shifty subsoil of the Charles River Basin. The DPW would also have had to admit to the federal government (which pays 90 per cent of the highway's costs) that it was wrong more than a year ago when it first chose the Brookline-Elm route; the DPW was not to be moved easily...
...years of negotiation, on 38 tons as the maximum weight for a long-haul truck, but they still have not stipulated how this weight should" be distributed over each axle. Five of the six prefer 13-ton limits per axle, but the Dutch, because of their soggy, shifting subsoil, demand a lighter weight of ten tons. Similarly, in designing a common farm tractor, the Dutch want safety features to prevent the tractor from toppling backward as it pulls attachments through their heavy-clay lowland soil. The French want a tractor engineered not to topple sideways on the hills, where much...