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预应力迭合楼板在世界各地都有广泛的研究和应用。上海也早在五十年代末就用于3.6米开间的屋面工程中。一、概况:预应力迭合楼板一般是底部为先张法的预应力薄板(采用高强钢材和高标号混凝土。)铺设到楼面,下面加适当的支撑,再浇捣面层混凝土,形成整体的楼板。 (一)优点: 1.预应力薄板作为抗弯构件的受拉部份由于采用高强钢材,因而能大量节约钢材, 2.预应力薄板未和面层结成整体以前,有一定的刚度,可以代替模板。 3.预应力薄板自重不大,便于运输,也不需要大型的机械吊装。 4.板底如平整,无特殊需要也可不做粉刷,只需嵌缝和喷浆处理。
Prestressed laminated floors are widely studied and applied throughout the world. Shanghai was also used in the roofing project of 3.6 meters in the early 1950s. I. Overview: Prestressed laminated slabs are generally prestressed slabs (using high-strength steel and high-grade concrete) with a pretensioned slab at the bottom. They are laid on the floor, under the appropriate support, and then poured into the concrete to form a whole. Floor. (I) Advantages: 1. The prestressed sheet is used as the tensile part of the flexural member. Due to the use of high-strength steel, it can save a lot of steel. 2. The prestressed sheet has a certain rigidity before it is integrated with the surface layer. Instead of a template. 3. The pre-stressed sheet has little self-weight and is easy to transport and does not require large-scale mechanical lifting. 4. If the bottom of the plate is flat, no special needs are required or painting is not required. It only requires caulking and spraying.