pre-cast pile 预制桩
pre-cast pile foundation 预制桩基础
pre-cast pipe pile 预制管桩桩基
pre-cast driven pile 预制打入桩
Pile foundation is widely used in construction in Shanghai region, but the site test data on bearing capacity of pre-cast concrete pile based on cohesive soil were lower than theoretical level.
上海地区建筑工程普遍采用桩基，但以粘性土为持力层的预制桩实测承载力普遍低于理论值，主要是因为休止期较短及对端承力作用认识不足。
Low strain dynamic testing on actual pile was conducted to investigate if the wave velocity is varied in the installed pre-cast pile.
通过实际工程的低应变桩基动测，发现打入桩的波速随时间提高。
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