桥梁大体积混凝土裂缝产生机理及抗裂措施  

Machanism analysis and control measures of construction cracks of mass concrete in bridges

作　　者：方灿鑫 李剑飞 刘佟生 

机构地区：[1]中铁六局集团北京铁建公司

出　　处：《山西建筑》2011年第1期157-158,共2页Shanxi Architecture

摘　　要：深入分析了桥梁大体积混凝土施工中温度裂缝、收缩裂缝产生的机理,从原材料选择、配合比设计、施工养护及约束控制四个方面阐述了防止裂缝产生的方法和措施,以确保桥梁的正常使用及安全。The paper analyzes the machanism of the occurrence of temperature cracks and shrinkage cracks in detail of mass concrete in bridge. At the same tine, it explains some measures on crack prevention, from unprocessed materials, mixture ratio design, construction curing and restrict control, so as to ensure the usual application of bridges and their safety.

关 键 词：温度应力 收缩应力 二次投料 约束控制 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]