The distribution of the ground fissure determines the
characteristics of the ground fissure disaster, and is
one of the main basis to determine the mechanism of the
ground crack and the width of the building.
(1) Banding property
This is the most important feature of the distribution of
ground fissures. Along the ground crack direction, there
is a clear zonal distribution on the building, which is
followed by the ground crack zone, and in a certain width,
the disaster has the characteristics of continuous display
on different types of buildings.
(2) The irresistible nature of the disaster
The disaster survey has proved that, where the ground cracks
pass through, the structures of the buildings, new and old,
and the type of material structure are ultimately destroyed,
and the buildings on the ground fissure belt can not resist
the destruction of the ground cracks, no matter how they are
The cracking, deformation and development trend of buildings
in the ground fissure zone are directional.
1) the order of building cracks caused by ground fissure
usually develops from bottom to top, indicating that the
influence of ground fissures on buildings is transmitted
from bottom to top.
2) the cracking pattern of buildings is related to the
tendency of ground fissure and the way of activity.
The activity of ground fissure is periodic. For example,
the activity cycle of the ground fissure in Henan is
consistent with the sunspot activity cycle, and occurs
near the valley year. The short period observation of
Datong ground fissure shows that within a year, the activity
rate of ground fissure increases by about 4~5 times in