预应力混凝土管桩抗拉结构性能研究  

Tensile properties of prestressed concrete piles

作　　者：郑秀娟[1] 王春潮[1] 杜冰[1] 钟刚[1] 

机构地区：[1]天津市建筑科学研究院,天津300193

出　　处：《岩土工程学报》2010年第S2期103-106,共4页Chinese Journal of Geotechnical Engineering

摘　　要：通过对PHC400-A型和PHC500-A型预应力混凝土管桩现场抗拔静载试验和室内足尺寸试验,研究端板、墩头、焊缝及桩身的抗拔性能、破坏形式和薄弱部位。两种试验对比得出上述两种桩型在保证混凝土龄期的情况下,桩身与承台连接安全、桩身结构承载力得到有效发挥时需要2～3m的填芯,并针对天津地质情况指出抗拔静载试验所需要的加载方式。PHC400-A and PHC500-A prestressed concrete piles are tested by two methods:uplift static load in site tests and full scale laboratory tests,to study the failure modes,weak parts and structural strength of the piles,end plates,piers and weldings.By comparing the results of two test methods,it turns out that 2～3 m-long core concrete is needed to ensure the prestressed concrete piles to serve properly if piles have proper curing age,and a suitable loading method is achieved in uplift static load tests in Tianjin.

关 键 词：预应力混凝土管桩 抗拔静载试验 室内足尺寸试验 极限抗拔承载力 填芯混凝土 

分 类 号：TU473.13[建筑科学—结构工程]