Large patios should have integral drains or proper slope design that will carry water to a low point drain.
大院子应该有不可分割的排水渠或斜坡进行适当的设计，将进行水低谷流失。
On this basis the measures of horizontal drain Wells for dewatering the body of slope and preventing landslides are proposed.
提出了采用水平排水技术疏干坡体，防治滑坡的技术措施。
At the foot of the drainage on embankment slope, there must be a drain, the depth and thickness of which must guarantee enough draining section when the surface is frozen.
贴坡排水层的底脚处必须设置排水沟或排水体，其深度或厚度应使水面结冰后，排水沟(排水体)的下部仍有足够的排水断面。
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