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跨越通道的排水设计

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发布时间:2013/5/13

排水设计通常采用适当提高路基最小填土高度或在路基底部设置隔水垫层等办法。施工期间一般都考虑在施工前开挖临时排水边沟,排除施工期地表水并降低地下水,同时在路基底部掺加低剂量石灰处理,设置40cm厚的稳定层等。采用这一系列措施可起到事半功倍的效果。
Drainage is usually designed with proper increase of roadbed filling height of subgrade bottom or at least set water cushion etc.. During the construction period is generally considered a temporary drainage ditch excavation in the construction, the construction period and reduce the exclusion of surface water and groundwater, in subgrade bottom with low dose lime treatment, set the stable layer of 40cm thick. This series of measures can play a multiplier effect.
软式透水管对于边沟水进入涵洞及跨越通道等情况的处理:软式透水管及横向排水管,将施工期进入中央分隔带的雨水及运营期中央分隔带的下渗水迅速排出路基之外。沿线设置的涵洞有排涵、灌涵和灌排两用涵。对于需排入排涵的边沟,其边沟底标高不低于涵洞中心的标高;需排入灌涵的边沟,其沟底标高不低于涵顶标高;而对于灌排两用的涵洞应按灌涵要求设置,特殊情况时可适当降低。为防止冲刷涵洞,原则上采用边沟急流槽连接边沟和涵洞洞口。一般情况下边沟尽量少穿越通道,当排水需通过通道排入涵洞时,应优先采用边沟盖板涵,特殊情况下可采用边沟倒虹吸穿越通道。
Treatment for the side ditch water into the culvert and across the channel, the soft water pipe: soft water pipe and the transverse drainage pipe, the construction period into the central central rainwater and operation period with separated water rapidly excreted outside with subgrade. Located along the line have a drainage culvert culvert, irrigation and irrigation and drainage culvert and culvert. To be discharged into the drainage culvert side ditch, the ditch bottom elevation is not lower than the elevation of culvert center; be discharged into the irrigation culvert side ditch, the ditch bottom elevation of not less than the culvert top elevation; while for dual-use irrigation and drainage culvert should press irrigation culvert requirements set, special circumstances may be appropriate to reduce. In order to prevent scour culvert, side ditch chute connected by principle of ditches and culverts hole. General bottom ditch as little as possible across the channel, when the drainage through the channel into the culvert, priority should be given to the side ditch cover plate culvert, special circumstances can be used the side ditch of Inverted Siphon across the channel.

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