都汶高速公路先张法预应力混凝土空心梁板施工技术研究  

RESEARCH ON CONSTRUCTION TECHNIQUE OF PRETENSIONED PRESTRESSED CONCRETE HOLLOW BEAM SLAB IN CHENGDU-WENCHUAN EXPRESSWAY PROJECT

作　　者：黄显彬[1] 莫忧[1] 恩文海 

机构地区：[1]四川农业大学城乡建设学院,四川都江堰611830 [2]四川铁科建设监理公司,成都610031

出　　处：《建筑技术》2009年第8期693-695,共3页Architecture Technology

基　　金："211工程"建设高校的学术支撑人才院级专项科技支持计划资助(N2009-008)

摘　　要：预应力混凝土结构,受力和截面刚度比钢筋混凝土合理,以其承受荷载较大及施工技术日臻完善,越来越多地应用在公路和铁路桥梁工程。先张法预应力可用于公路桥梁13m、16m、20m等跨径小于25m的空心梁板。重点对先张法预应力混凝土空心梁板的钢绞线伸长量、钢绞线张拉、混凝土浇筑等关键过程进行深入细致地研究,并对如何处理混凝土中断浇筑及混凝土凝结时间检测的重要意义进行了分析。Force bearing and sectional rigidity of prestressed concrete structure are more reasonable than those of reinforced concrete. Prestressed concrete structure can bear relatively larger load and has mature construction techniques, so more and more prestressed concrete structures are used in highway, railway and bridge projects. Pretensioned prestressing is applicable to hollow beam slab of highway bridge whose span is less than 25 m. Key processes, such as elongation and stretching of steel strand of pretensioned prestressed concrete hollow beam slab and pouring of concrete, are researched in details. Method to treat interrupted casting of concrete and significance of test on concrete setting time are analyzed.

关 键 词：先张法 预应力 钢绞线 模板 

分 类 号：TU757[建筑科学—建筑技术科学]