超高吨位灌注桩静载试验中的预应力混凝土反力装置

Prestressed concrete reaction system for ultrahigh static loading tests of bored piles

在复兴大桥超高吨位灌注桩的静载试验,预应力混凝土反力装置替代了传统的钢梁反力系统。这套装置主要包括预应力锚桩、预应力承台与预应力反力梁。试验结果表明,直接获得超高吨位大直径嵌岩桩的极限承载力相当不易,而对这类问题预应力混凝土反力装置是值得考虑的。

The traditional steel beam reaction system was substituted by prestressed concrete reaction system in the ultrahigh static loading tests of bored piles of Fuxing Bridge. It was shown that it was still difficult to directly obtain the ultimate bearing capacity of a large-diameter rock-socketed pile, and the prestressed concrete reaction system was helpful to the solution of this kind of problems.