| 摘要 |
PURPOSE: An underground displacement measurement device is provided to accurately measure all kinds of ground displacement states based on minute ground displacement and to simplify and standardize an assembling process for manufacturing the device. CONSTITUTION: An underground displacement measurement device includes a variable pipe (130). Connection pipes (150) are connected to both sides of the variable pipe respectively. Both end portions of a measurement unit are connected to the connection pipe and the variable pipe respectively. The connection pipe and the variable pipe are connected by a connection member having a spacer (170). The variable pipe is moved around the connection pipe when an external force is applied in the middle of connecting the connection pipe and the variable pipe. |
