land direct foundation

• 地层基础

land direct foundation的用法和样例：

例句

1. Bored and cast reinforced concrete piles were adopted as the foundation for piers and abutments of Huangjiadun Middle Bridge in Lewen Expressway.
   某高速公路黄家墩中桥因墩下土层为软弱地层而采用钻孔灌注桩作为墩台基础。