A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Prestressed concrete slab construction method
The invention relates to a prestressed concrete slab construction method. The method comprises the following steps that materials and appliances are prepared; a bottom film is erected, a reinforcing steel bar framework is bound, and a reinforcing steel bar bracket is fixed in the reinforcing steel bar framework; a corrugated pipe bound with a prestressed tendon is arranged in the steel bar bracketin a penetrating mode, and spiral tendons and anchor bearing plates are installed at two ends of the prestressed tendon; a side end formwork is closed, and concrete is poured; a coating piece is arranged above the concrete to form a coating space, hot steam is introduced into the coating space, a heat supply medium is introduced into the corrugated pipe at the same time, and the temperature difference between the hot steam introduced into the coating space and the heat supply medium in the corrugated pipe is not higher than 5 DEG C; after the concrete setting strength reaches 85%-90% of preset strength, the side end formwork is dismounted, and a tensioning device is used for tensioning the prestressed tendon; and grouting is conducted in corrugated pipes forming a hole channel, and aftergrouting is completed, anchor sealing protection is conducted on two ends of the hole channel. According to the method, the curing time is shortened, and the strength of the concrete after coagulationcan be effectively maintained.
本申请涉及一种预应力混凝土板施工方法，其以下步骤：材料与器具准备；架设底膜，绑扎钢筋框架，并在钢筋框架内固定钢筋支架；将穿束有预应力筋的波纹管穿设于钢筋支架中，在预应力筋的两端安装螺旋筋与锚垫板；封闭侧端模板，浇筑混凝土；在混凝土上方布设包覆件以形成包覆空间，往包覆空间内通入热蒸汽，同时在波纹管内部通入供热介质，并保持通入包覆空间内热蒸汽与波纹管内供热介质之间的温差不高于5℃；至混凝土凝结强度达到预设强度85%‑90%后，拆除侧端模板，并使用张拉装置对预应力筋进行张拉；向形成孔道的波纹管内灌浆，完成灌浆后，对孔道的两端进行封锚保护。本申请在缩短养护时间的同时，能够有效保持混凝土凝结后的强度。
Prestressed concrete slab construction method
The invention relates to a prestressed concrete slab construction method. The method comprises the following steps that materials and appliances are prepared; a bottom film is erected, a reinforcing steel bar framework is bound, and a reinforcing steel bar bracket is fixed in the reinforcing steel bar framework; a corrugated pipe bound with a prestressed tendon is arranged in the steel bar bracketin a penetrating mode, and spiral tendons and anchor bearing plates are installed at two ends of the prestressed tendon; a side end formwork is closed, and concrete is poured; a coating piece is arranged above the concrete to form a coating space, hot steam is introduced into the coating space, a heat supply medium is introduced into the corrugated pipe at the same time, and the temperature difference between the hot steam introduced into the coating space and the heat supply medium in the corrugated pipe is not higher than 5 DEG C; after the concrete setting strength reaches 85%-90% of preset strength, the side end formwork is dismounted, and a tensioning device is used for tensioning the prestressed tendon; and grouting is conducted in corrugated pipes forming a hole channel, and aftergrouting is completed, anchor sealing protection is conducted on two ends of the hole channel. According to the method, the curing time is shortened, and the strength of the concrete after coagulationcan be effectively maintained.
本申请涉及一种预应力混凝土板施工方法，其以下步骤：材料与器具准备；架设底膜，绑扎钢筋框架，并在钢筋框架内固定钢筋支架；将穿束有预应力筋的波纹管穿设于钢筋支架中，在预应力筋的两端安装螺旋筋与锚垫板；封闭侧端模板，浇筑混凝土；在混凝土上方布设包覆件以形成包覆空间，往包覆空间内通入热蒸汽，同时在波纹管内部通入供热介质，并保持通入包覆空间内热蒸汽与波纹管内供热介质之间的温差不高于5℃；至混凝土凝结强度达到预设强度85%‑90%后，拆除侧端模板，并使用张拉装置对预应力筋进行张拉；向形成孔道的波纹管内灌浆，完成灌浆后，对孔道的两端进行封锚保护。本申请在缩短养护时间的同时，能够有效保持混凝土凝结后的强度。
Prestressed concrete slab construction method
预应力混凝土板施工方法
WANG ZHIYANG (author) / SU GUANGLIANG (author) / YUE XIHONG (author) / HU YAFEI (author) / DENG WEIJIE (author)
2021-02-05
Patent
Electronic Resource
Chinese
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