但随着基坑降水的进行，排水层以上各点均受较大影响，并且距离路基表面越近影响越大。
By dewatering of foundation pit, the points above the drainage layer all have a considerable influence and the shorter distance with the subgrade surface the more influence.
城市快速路排水设计，一般只考虑路面径流的做法，主要从道路表面、路面结构内部和路基(包括绿化带)三方面时排水进行综合介绍。
The drainage design of urban highway deals with only the surface run-off. It presents a new drainage system considering the road surface, pavement structure, and subgrade (including green belt).
具有较强的抗强力碰撞和冲击能力；多重防震结构和表面涂层处理，可在路基、路轨高频震动和潮湿、高温环境中长期工作。
Strong and impact-resistant, multi-shockproof structure, surface coating, can be used in roadbed, tracks and high-frequency vibration and humidity, high temperature environment.
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