随着城市高层建筑的大量兴建,要求基础支承的荷载日益增大,以及城镇中具有优良地基条件的场地减少,导致桩基工程迅速发展,现已成为高层建筑、船舶码头、各种桥梁、拦河水闸,飞机跑道等建筑物的主要基础形式之一.因此,人们对打入砼预制桩或各种砼灌注桩的桩身质量优劣、承载力大小、桩的完整性及成桩后的砼强度如何极为关注. With the large-scale construction of high-rise buildings in the city, the increasing load required for foundation supports and the reduction of sites with excellent foundation conditions in urban areas have led to the rapid development of pile foundation projects, which have now become high-rise buildings, ship terminals, bridges, and bridges. One of the main basic forms of buildings such as river sluice gates and airstrips. As a result, the quality of the pile body, the bearing capacity, the integrity of the pile, and the post-stake How intense is the strength?