The sidewalk collapse of Xixi Road in Hangzhou is suspected that the two lost contact. Why does the road surface collapse when it is so strong?

The cause of collapse can be caused by many reasons. The basic factor is uneven settlement of subgrade, which leads to pavement collapse. There are many reasons for uneven settlement of subgrade: for example, poor soil quality of foundation; Affected by groundwater; The bottom is hollowed out, etc.

In fact, the collapse of expressway is a very common problem, and people who often drive know it. If there is a big, heavy truck in front of you, it appears on the road passing by. A big black hole.

Don't drive in dark areas at this time. Because some roads cannot bear the weight of big trucks. The road will collapse. If you drive in again at this time. It's likely to fall in.

Extended data:

Signs of pavement collapse:

1, cracks of various shapes appear on the pavement;

2. There are pits on the ground, accompanied by unknown water;

3. The corner of the surrounding building cracked, the wall began to tilt and the foundation collapsed;

4. When driving by, you can hear an obvious hollow sound accompanied by vibration;

5. The pipeline leaks. If you find the above roads, stay away and report to the local fire department in time.

Baidu Encyclopedia-8 28 Hangzhou Road Collapse Accident