Dynamic stress is distributed as saddle along the lateral direction of subgradesurface. 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。
2
By dewatering of foundation pit, the points above the drainage layer all have a considerable influence and the shorter distance with the subgradesurface 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。
3
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).