钢筋混凝土桩头,尽管用许多横向箍筋加固,但仍常因桩头过早破坏而打不到设计桩高。为此,苏联进行了用钢纤维增强桩头的试验研究,并比较了不同标号、配筋、纤维配筋率和成型方法的混凝土桩,钢筋混凝土桩及纤维增强的钢筋混凝土桩的纵向抗锤击能力。试验表明,钢纤维配筋的预制桩的抗冲击强度比混凝土桩高2.7～8.3倍(其静力强度仅高8～27％),比普通钢筋混凝土桩高1～4倍。钢筋混凝土桩经几次锤打后,先是混凝 Reinforced concrete pile heads, although reinforced with many lateral stirrups, still often fail to reach the design pile height due to premature failure of the pile head. To this end, the Soviet Union conducted a pilot study on the use of steel fiber reinforced pile heads, and compared concrete piles with different numbers, reinforcements, fiber reinforcement ratios and forming methods, and longitudinal hammers of reinforced concrete piles and fiber-reinforced reinforced concrete piles. Hit ability. Tests have shown that the impact strength of prefabricated piles with steel fiber reinforcement is 2.7-8.3 times higher than that of concrete piles (its static strength is only 8-27% higher), which is 1-4 times higher than that of ordinary reinforced concrete piles. After several times of hammering, the reinforced concrete pile is first coagulated