设置膨胀加强带对闸墩结构施工期温控防裂的影响研究  

Study on temperature control and crack prevention of pier with expansion strengthening belt during construction

作　　者：李树山[1] 李红梅[1] 解伟[1] 

机构地区：[1]华北水利水电学院,河南郑州450045

出　　处：《混凝土》2011年第11期120-122,共3页Concrete

基　　金：国家自然科学基金(50779018);河南省科技创新杰出人才项目(094200510011)

摘　　要：基于施工期闸墩结构裂缝成因,提出了墩体表面保温与设置膨胀加强带相结合的温控防裂措施。根据混凝土结构温度场和应力场的计算原理,运用有限元法对闸墩结构施工期温度应力进行了仿真计算。结果表明,采取表面保温和设置膨胀加强带相结合的温控措施,闸墩结构防裂效果良好。该技术措施对同类工程设计与施工具有一定的参考价值。Based on the causes for cracks of the pier in the construction,the temperature-control measure with the combination of the surface heat preservation and setting expansion strengthening belt is proposed.According to the calculation principle of the concrete temperature and stress field,simulation calculation of the temperature stress in the pier construction is carried out by the finite element method.Results indicate that the crack control of the pier is effectively by use of the combination of the surface heat preservation and setting expansion strengthening belt.The measure has the certain reference value for similar engineering design and construction.

关 键 词：闸墩 裂缝 膨胀加强带 温度应力 内外温差 

分 类 号：TU528.064[建筑科学—建筑技术科学]