The paper introduced how to solve surface leakage of excavated pile with double protective casing and the better results have been achieved.
本文介绍采用双护筒解决挖孔桩地表水渗漏问题，取得了较好的效果。
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Sutong Bridge located in the tidal reach adopts the pile-group foundation with large-diameter and over-length bored piles working with the steel casing together.