1概述在我国，预应力硅空心板已被广泛用于多层房屋的楼盖结构中，特别是住宅建筑，据有关统计资料表明，全国每年使用空心板的建筑面积约2亿m2，砼量约1500m万m3，预应力钢筋约为70~80万t，可节约钢材20～30万t，具有良好的经济效益和社会效益。但大多数预应力空心板的预应力 1 Overview In China, prestressed silicon hollow slabs have been widely used in the floor structure of multi-storey houses, especially residential buildings. According to relevant statistical data, the annual building area of ​​hollow slabs in China is about 200 million m2. About 1500million m3, prestressed steel bars are about 700-800,000t, which can save 200,000-300,000 tons of steel, with good economic and social benefits. However, most prestressed hollow slabs are prestressed