| 摘要 |
The present invention relates to a friction-free pile, and more particularly, to a friction-free pile comprising: a pile body which is installed in the ground having a constant-temperature layer and an active layer and of which upper end part protrudes towards the upper part of the active layer and of which lower end part is located and fixed in the constant-temperature layer; a moving body mounted to surround the outer circumference of a part of the pile body which is located in the active layer; and bearing means mounted between the moving body and the pile body to make the moving body be able to move along the pile body at the time of expansion or contraction of the active layer by freezing or thawing. Therefore, the friction-free pile prevents displacement because the moving body is moved along the pile body at the time of expansion or contraction of the active layer due to temperature change and the pile body maintains a state to be fixed in the constant-temperature layer corresponding to stress and friction force. According to the present invention, the friction-free pile can maintain the fixing position of the pile body by relieving and blocking an external force generated by the moving body which is moved along the pile body by the bearing means, prevent a damage of facilities installed on the pile, and reduce maintenance costs because addition electric power is not used. |
