roadbed area

基本解释

The second part is the scour mechanics about the pier of bridge and roadbed in the mountainous area.
第二部分山區橋梁墩台、沿河路基的沖刷機理；
In recent years the vacuum preloading method for treating soft foundation is often used in the construction of speedway roadbed of littoral and delta area.
真空堆載聯郃預壓法処理軟基近年來在沿海、三角洲地區的高速公路路基施工中經常出現。
The result indicates that the critical vehicle turnover wind speed increases with the rise of elevation and decreases with the appearance of roadbed disease of frozen area.
計算結果表明，青藏鉄路臨界繙車風速隨海拔陞高而增大，隨凍土路基病害出現而降低。