后浇带的作用（The effect of post pouring belt）.docVIP

后浇带的作用（The effect of post pouring belt） The pouring belt is in construction to prevent the cast-in-place reinforced concrete structure due to harmful cracks temperature, uneven shrinkage may have, in accordance with the requirements of design and construction specifications, in the basement, walls, beams corresponding to the position setting temporary construction joints, the structure is divided into temporary cadres if, after internal contraction at some time after pouring the concrete construction joints, the structure as a whole. The pouring time of the pouring belt should choose low temperature, available pouring cement or cement mixed trace aluminum concrete, its strength should be higher than the component strength, to prevent the occurrence of cracks between new and old concrete, resulting in weak position. After setting the back of the belt should also consider the template and other measures, different consumption factors. The post pouring zone is an effective measure to solve the settlement difference and reduce the shrinkage stress, so it is used more in engineering. Set the position of the late poured band, the distance calculation is determined by design, its width considering convenient construction, avoid the stress concentration is 800 ~ 1200mm; the waterproof requirements of the parts of the pouring belt, belt sealing should be considered. Effect 1. settlement difference The design of the structure and foundation of high-rise building and the podium of the whole, but in the construction of the two part with the post pouring belt temporarily disconnected to the main structure of the construction is completed, has completed most of the settlement (more than 50%) after the connection part of the concrete pouring, the level as a whole. When designing, the foundation should consider two stages, different stress states, and carry on the strength check separately. The integral calculation should consider the additional internal forces caused by the later