Patent ID: 11891771
Assignee: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS
Field: Civil engineering (Other fields)
Classification: CPC E  Y | IPC E

Claim 9:
10. The device of claim 1, wherein
a top of the anti-frost heaving rod is an inclined plane;
the top of the anti-thawing settlement rod is an inclined plane;
a first angle between a top surface and an inner side surface of the anti-frost heaving rod is an obtuse angle;
a second angle between a top surface and an inner side surface of the anti-thawing settlement rod is an obtuse angle;
a third angle between the top surface and an outer side surface of the anti-frost heaving rod is an acute angle; and
a fourth angle between the top surface and an outer side surface of the anti-thawing settlement rod is an acute angle.