1, void (hollowed out under the road bed);

2. Broken board (also caused by empty drum under the road bed);

3. Irregular cracking (mainly unstable subgrade and base, causing uneven settlement);

4, washboard, this is mainly caused by car braking on steep slopes;

5. Expansion joint bulging is caused by too small expansion joint setting and rising temperature;

6, shrinkage joint is too large, there is mud overflow, this is because the gap water stop is lax, causing damage, resulting in water infiltration into the grassroots and subgrade;

7, flatness is not enough, so that the driving jitter is serious, which is caused by poor construction control;

8. Comminuted fracture of individual plates is due to construction control loopholes (insufficient flexural strength of concrete or uneven thickness control).