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针对柴达木沙漠公路路基水毁现象,从路基高度设计、桥涵构造物设置、路界地表排水、路面内部排水、路界地下排水等方面进行研究。结果表明:(1)从概念设计角度考虑,柴达木沙漠公路路基高度在1.0m以上,并保证桥涵构造物数量,可降低水毁危害;(2)沙漠公路排水体系设计的重点是路面水流的疏导排除,拦水带、急流槽、坡面防护的设置至关重要;(3)柴达木荒漠区年降雨量小于50mm,可不考虑路面内部排水;(4)当路基设计高程到天然地下水位的距离小于3.2m或天然水位高于路基高程时,设置地下排水,利用渗沟对地下水进行汇集和排除。
Aiming at the water damage phenomenon of subgrade in Qaidam desert highway, the paper studies the height of subgrade, the setting of bridge and culvert structure, drainage of road surface, internal drainage of pavement and underground drainage in road boundary. The results show that: (1) From the viewpoint of conceptual design, the height of subgrade of Qaidam desert highway is more than 1.0m, and the quantity of bridge and culvert structures can be ensured, which can reduce the damage of water damage. (2) The design of desert highway drainage system focuses on the water flow of pavement (3) The annual rainfall in the Qaidam desert area is less than 50mm, irrespective of the internal drainage of the pavement; (4) When the subgrade design elevation to natural groundwater Bit distance less than 3.2m or natural water level is higher than subgrade elevation, set the underground drainage, the use of gully to pool and exclude groundwater.