A huge explosion occurred in a residential area in Yanjiao, Hebei Province, and the wall of the building cracked and scattered all over the place. What caused this?

1. A huge explosion occurred in a residential area in Yanjiao, Hebei Province, and the wall of the building cracked and scattered all over the floor. What caused this?

2. A: A loud explosion suddenly came from a residential area in Yanjiao Development Zone, sanhe city, Langfang City, Hebei Province. The glass of the nearby residents' houses was shattered, and the wall that made a huge explosion sound was shattered. At present, the casualties of residents are still unclear.

Three, the wall cracks are large and small, with different sizes and different penetration methods, so there are many reasons, such as some wall cracks caused by uneven settlement of foundation, and some wall cracks caused by inadequate construction. These reasons will have a great and small impact on the wall, and cracks will appear in the wall in the later period. The size of cracks caused by different reasons is different, so the influence degree of danger is different.

Fourth, the change of temperature will also cause the wall to crack. Thermal expansion and contraction will adversely affect most objects, even masonry buildings. Because the change of temperature will cause uneven contraction of masonry, when the temperature should exceed the strength of masonry, thermal expansion and cold contraction will lead to cracks in the wall.

Five, due to the introduction of national measures to protect cultivated land, clay solid bricks and clay hollow bricks have been generally banned and restricted, and various blocks have been widely used in every household. However, cracks and water seepage are common in cement block walls, because the wet expansion and dry shrinkage of blocks are particularly obvious in the external walls. When the drying shrinkage of the block is large, the wall is prone to cracks.

Six, between different processes of the wall base, if you don't operate according to the specified requirements, such as gypsum leveling without drying, it will lead to the gradual loss of water in the later wall, and adopting different processes will directly lead to structural dislocation and eventually lead to wall cracking.