CFG桩复合地基桩身材料性能研究  

Study on properties of CFG pile composite foundation of pile materials

作　　者：李明东[1] 程祖锋[1] 杜西岗[1] 尹磊[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2009年第4期8-12,共5页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：通过对大掺量Ⅲa级粉煤灰混凝土构成的CFG桩身材料进行力学性能方面的室内试验,讨论了抗压强度与材料配合比、龄期之间的关系,并探讨了桩身材料性能对CFG桩承载力的影响。结果显示抗压强度均随着胶凝效率的增大而减小,粉煤灰替代水泥率超过40%后抗压强度仍能满足设计要求,随着龄期的增长,每一类型、一定胶凝效率试件的抗压强度都有显著提高。This paper analyzises the relationship between the compressive strength material ratio and the age of concrete respectively, and discusses the bearing capacity impected by the material properties of the pile through the experiments on materials mechanical properties of CFG pile composed of Grade Ⅲ a large dosage of fly ash concrete. The results show that the efficiency of the compressive strength increases with the gel decreasing, and the compressive strength could still meet the design requirements when the replacement rate of fly ash cement is more than 40% ; with the increasement of the age, all type and some certain cementation efficiency of the specimen compressive strength are improved significantly.

关 键 词：CFG桩 粉煤灰混凝土 配合比 粉煤灰 抗压强度 

分 类 号：TU473.1[建筑科学—结构工程]