| 单词 |
subgrade |
| 释义 |
subgrade
sub·grade S0840100 (sŭb′grād′)n. The level layer of rock or earth upon which the foundation of a road or railway is laid.subgrade (ˈsʌbˌɡreɪd) n (Civil Engineering) the ground beneath a roadway or pavementsubgrade
subgrade[′səb‚grād] (civil engineering) The soil or rock leveled off to support the foundation of a structure. subgrade1. The soil prepared and compacted to support a structure or a pavement system; the base portion of any surfaced area, the elevation of which is lower than that of the finished grade. 2. The elevation of the bottom of a trench in which a sewer or pipeline is laid. |
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