混凝土浇筑前，首先检查模板有无缝隙、孔洞，模板内的木碎、杂物要清除干净

Before pouring concrete, first check the formwork for seamless gaps, holes, wood fragments and debris in the formwork to be cleaned, and the formwork gaps are tight and no slurry is leaked. The cleaning port of the template should be closed after removing debris and accumulated water. Wet the formwork before pouring. <br>3.2 The pouring of concrete starts from one end and advances with the "crushing method". The layering is first cast into a ladder shape, and when the foundation position is reached, it is poured together with the concrete of the slab. As the ladder shape continues to extend, it continuously advances. The thickness of the virtual pavement for the foundation pouring is slightly greater than the slab thickness, and the flat vibrator is used to vibrate back and forth in the vertical pouring direction, and the moving sign is continuously used to control the thickness of the concrete slab. After pouring the floor to the elevation, flatten it with a shovel, then smooth it with a long scraping ruler, and wipe the surface with a wooden crab to reduce the shrinkage cracks of the concrete. <br>3.3 The concrete vibrator should be inserted quickly and slowly when using an insert vibrator. The insertion points should be evenly arranged and moved point by point, in order, and must not be omitted to achieve uniform vibration. The moving distance is not more than 1.5 times the action radius of the vibrator (usually 300-400MM). In the layered pouring, the upper concrete should be inserted into the lower concrete more than 50MM to eliminate the joint between the two layers. The moving distance of the plate vibrator should be It can ensure that the flat plate of the vibrator covers the edge of the vibrated part. <br>3.4 When laying the conveying pipe, a temporary facility row or horse stool must be set up, and the conveying pipe is not allowed to be placed directly on the steel bar to prevent the steel bar from shifting or deforming. When pouring concrete, it is not allowed to arbitrarily step on the steel bars, move the embedded parts and reserve the original positions of the holes, and it is not allowed to randomly vibrate the steel bars, formwork and embedded parts with a vibrating rod to prevent deformation of the steel bars and formwork and the embedded parts falling off. <br>3.5 When placing concrete, send reinforcement workers and woodworkers to observe the reinforcement and formwork, and reserve holes, embedded parts, inserted bars, etc. for displacement, deformation or blockage. If problems are found, stop pouring immediately and finish repairing before the concrete has been poured. <br>3.6 After the concrete is poured, it should be covered within 12 hours and watered for curing. It is covered with a wet straw bag or plastic film in summer to protect it; in winter, anti-freezing and warming work is done to avoid the concrete from being frozen during the initial setting and causing hidden dangers to the structure.

混凝土浇筑前，首先检查模板有无缝隙、孔洞，模板内的木碎、杂物要清除干净，模板缝隙严密不漏浆。模板的清扫口应在清除杂物及积水后再封闭。浇筑前对模板浇水湿润。<br>3.2浇筑混凝土，由一端开始用“赶浆法”推进，先将分层浇筑成阶梯形，当达到基础位置时再与板的混凝土一起浇筑，随着阶梯形的不断延长，连续向前推进，基础浇筑的虚铺厚度略大于板厚，用平板振动器垂直浇筑方向来回振捣，不断用移动标志以控制混凝土板厚度。楼板浇至标高后，用铁锹拍平，再用长刮尺刮平，木蟹抹面，以减少混凝土收缩裂缝。<br>3.3混凝土浇筑使用插入式振捣器应快插慢拔，插点要均匀排列，逐点移动，按顺序进行，不得遗漏，做到均匀振实。移动间距不大于振捣器作用半径的 1.5 倍（一般为 300 -400MM ），分层浇筑中振捣上层混凝土应插入下层混凝土 50MM 以上以消除两层间的接缝，平板振动器的移动间距应能保证振动器的平板覆盖已振实部分边缘。<br>3.4铺设输送管时，必须搭设临时设施排架或马凳，不准将输送管直接放在钢筋上，以防钢筋移位、变形。混凝土浇捣时，不得任意踩踏钢筋、移动预埋件和预留孔洞的原来位置，不允许用振动棒随意振动钢筋、模板和预埋件，以防钢筋、模板变形、预埋件脱落。<br>3.5浇筑混凝土时派钢筋工和木工观察钢筋和模板，预留孔洞、预埋件、插筋等有无位移变形或堵塞情况，发现问题应立即停止浇筑并应在已浇筑的混凝土前修整完毕。<br>3.6混凝土浇筑完成后，应在 12 小时以内加以覆盖，并浇水养护。夏天加盖湿草包或塑料薄膜养护；冬季做好防冻保暖工作，以避免混凝土在初凝时受冻而使结构存在隐患。

Before concrete pouring, first check whether there are gaps and holes in the formwork, clear the wood chips and sundries in the formwork, and ensure the formwork gap is tight without mortar leakage. The cleaning opening of the formwork shall be closed after the sundries and water are removed. The formwork shall be watered and wetted before pouring.<br>3.2 when pouring concrete, the "slurry driving method" shall be used at one end. First, the concrete shall be poured layer by layer into a stepped shape. When it reaches the foundation position, it shall be poured together with the concrete of the slab. With the continuous extension of the stepped shape, it shall be continuously pushed forward. The virtual paving thickness of the foundation pouring is slightly greater than the slab thickness. The slab vibrator shall be used to vibrate back and forth in the vertical pouring direction, and the moving signs shall be used to control the concrete slab Thickness. After pouring the floor to the elevation, beat it with a shovel, then scrape it with a long scraper, and plaster the wooden crab to reduce the shrinkage cracks.<br>3.3 the immersion vibrator used for concrete pouring shall be inserted quickly and pulled out slowly, and the insertion points shall be evenly arranged, moved point by point, and carried out in order, without omission, so as to achieve even vibration. The moving distance shall not be more than 1.5 times of the action radius of the vibrator (generally 300-400mm). During layered pouring, the upper layer concrete shall be inserted into the lower layer concrete for more than 50mm to eliminate the joint between the two layers. The moving distance of the plate vibrator shall ensure that the plate of the vibrator covers the edge of the vibrated part.<br>3.4 when laying the conveying pipe, it is necessary to set up the bent or horse stool of temporary facilities. It is not allowed to place the conveying pipe directly on the reinforcement to prevent the displacement and deformation of the reinforcement. During concrete pouring and vibrating, it is not allowed to trample on the reinforcement, move the original position of embedded parts and reserved holes at will, and it is not allowed to vibrate the reinforcement, formwork and embedded parts at will with a vibrator to prevent the reinforcement, formwork deformation and embedded parts falling off.<br>3.5 when pouring concrete, the reinforcement workers and carpenters shall be assigned to observe the reinforcement and formwork, and the reserved holes, embedded parts and joint bars shall be free of displacement, deformation or blockage. If any problem is found, the pouring shall be stopped immediately and the finished work shall be finished before the poured concrete.<br>3.6 after the concrete is poured, it shall be covered within 12 hours and watered for curing. In summer, cover with wet straw bag or plastic film for maintenance; in winter, do a good job in antifreeze and heat preservation to avoid the structure hidden dangers caused by the freezing of concrete at the initial setting.