问:整体现浇屋顶两头房间沿纵墙为什么常出现斜裂缝,应采取哪些措施? 答:房屋和一般物体一样,也有热胀冷缩的物理特性。如果排除地基不均匀下沉的因素,屋顶两头房间沿纵墙出现斜裂缝是温差裂缝。这是因为屋面是钢筋混凝土,其线膨胀系数为10×10~(-6),屋面下砖墙的线膨胀系数为5×10~(-6),二者相差一倍,即使在相同温度下,屋盖与墙体的温度变形也是不一致的,当房屋受太阳照射时,屋盖受热的时间比墙面长,特别在夏季,这二者温度 Q: Why are the diagonal cracks often appearing along the vertical wall in the two cast-in-place roofs? What measures should be taken? A. The physical properties of the house, like ordinary objects, have the effect of thermal expansion and contraction. If you exclude the factors of uneven subsidence of the foundation, the oblique cracks along the vertical wall of the two roofs of the roof are cracks in the temperature difference. This is because the roof is reinforced concrete, its linear expansion coefficient is 10×10~(-6), and the coefficient of linear expansion of the lower brick wall of the roof is 5×10~(-6), which is a difference of two, even at the same temperature. In addition, the temperature and deformation of the roof and the wall are also inconsistent. When the house is exposed to the sun, the roof is heated longer than the wall, especially in the summer, both temperatures