Dynamic stress is distributed as saddle along the lateral direction of subgrade surface. Dynamic stress along the depth declines sharply.

路基面动应力在横向呈马鞍分布，动应力沿深度方向衰减较快。

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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.

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。

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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).

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。

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