subgrade

subgrade

形容词： 1. 下级的；次要的 2. 基底的；基层的 名词： 1. 路基；路堤 2. 基层；底层 3. 路基土；路堤土

词语辨析：

subgrade与subbase的区别在于subgrade是指路基的最底层，而subbase是指路基的次底层。

词汇扩充：

1. subgrade soil：路堤土壤 2. subgrade construction：路基施工 3. subgrade preparation：路堤准备 4. subgrade improvement：路基改进

近义词：

1. base course 2. roadbed

反义词：

1. surface 2. pavement

柯林斯词典：

名词： 1. (Engineering: Civil engineering)
A subgrade is the layer of natural soil on which a road or railway is built.

牛津词典：

名词： 1. The natural ground below a road or railway.

用法：

1. The engineers are working on improving the subgrade of the road. 工程师们正在改进道路的路基。 2. The subgrade should be properly compacted before laying the pavement. 在铺设路面之前，应该对路基进行适当的压实。 3. The subgrade settlement caused damage to the road surface. 路基下沉导致了路面的损坏。

例句：

1. The subgrade should be well-drained to prevent water accumulation. 路基应该有良好的排水系统，以防止水积聚。 2. The stability of the subgrade is crucial for the long-term performance of the road. 路基的稳定性对道路的长期使用至关重要。 3. The subgrade soil needs to meet certain specifications for compaction and strength. 路堤土壤需要满足一定的压实和强度要求。 4. The subgrade settlement caused cracks in the pavement. 路基下沉导致路面出现了裂缝。 5. The subgrade material was tested for its bearing capacity. 路基材料被测试其承载能力。 6. The subgrade was reinforced with geotextiles to improve its stability. 路基使用了土工布进行加固，以提高稳定性。 7. The subgrade must be prepared before the construction of the road begins. 在开始道路施工之前，必须对路基进行准备。 8. The subgrade should be compacted in layers to achieve the desired density. 路基应该分层压实，以达到所需的密度。 9. The subgrade was excavated to a depth of one meter for the construction of the railway. 为了修建铁路，路基被挖掘到一米的深度。 10. The subgrade was found to be unstable, requiring additional reinforcement. 发现路基不稳定，需要额外加固。 11. The quality of the subgrade affects the performance of the entire road structure. 路基的质量影响整个道路结构的性能。 12. The subgrade material was tested for its compaction characteristics. 路基材料被测试其压实特性。 13. The subgrade was designed to withstand heavy traffic loads. 路基的设计要能够承受重型交通的荷载。 14. The subgrade was reinforced with a layer of geogrids. 路基被加固了一层土工格栅。 15. The subgrade settlement was due to inadequate compaction during construction. 路基下沉是由于施工过程中压实不足导致的。 16. The subgrade soil was stabilized using lime and cement. 路基土壤使用石灰和水泥进行了稳定处理。 17. The subgrade was excavated and replaced with a stronger material. 路基被挖掘并用更坚固的材料进行了更换。 18. The subgrade was compacted using a vibratory roller. 路基使用振动压路机进行了压实。 19. The subgrade should be protected from erosion by proper drainage measures. 应通过适当的排水措施保护路基免受侵蚀。 20. The subgrade was inspected for any signs of settlement or deformation. 对路基进行了检查，以寻找任何下沉或变形的迹象。