本文还探讨了座落在砂砾覆盖层上的趾板设计问题。
This paper also approached the design of toe-slab that is constructed on the covering strata of river.
小浪底主坝防渗墙是坝基砂砾石覆盖层渗流控制的关键工程，最深达80多米。
The infiltration protection wall of deepest of over 80 meters at Xiaolangdi dam is the key project to control infiltration in the sand and gravel layer at dam base.
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