請幫忙轉做”英文”..thx

The Ministry of Railways Qinghai-Tibet railway Office provides the material demonstrated that formerly in many year frozen earth area construction railroad, mainly adopted increases the embankment highly and lays down measures and so on thermal insulation material, separates or the reduced outside enters lower part the roadbed the quantity of heat, thus prevents or delays many year frozen earth degeneration. The massive project practice indicated that this method cannot fundamentally the improved subgrade hot physical state. The Qinghai-Tibet railway has established “the initiative temperature decrease, cools the ground, the protection frozen earth” the design concept, caused the frozen earth engineering design to realize “three big transformations”, namely: Transforms to the frozen earth environment analysis by the static state into dynamic; Transforms to the frozen earth protection by the passive heat preservation into the initiative temperature decrease; Transforms to the frozen earth government by the sole measure into multibarreled uneven, the synthesis treats.
The following is whole set mechanical control measure:
1. The slabstone air cooled measure - slabstone air cooled roadbed is establishes certain thickness and the voidage piece riddlings above the roadbed breaker strip, because the piece riddlings during high and low interface has the gradient of temperature, causes in the piece riddlings the air convection, the heat change function take the convection as the leadership, is bigger than the accumulated temperature size using the plateau frozen earth area negative accumulated temperature size the climate characteristic, sped up the roadbed basis stratum radiation, obtains reduces the ground temperature, the protection frozen earth effect