Confirmation Method of Urban Rail Transit Real Estate Spatial Rights in Three-dimensional Space

With the increase of underground structures such as urban rail facilities, the conventional confirmation method of urban rail transit real estate spatial rights in two-dimensional space is not applicable to the situation of inconsistent ownership of the surface and underground facilities. It is urgent to introduce the confirmation method of urban rail transit real estate spatial rights in three-dimensional space to ensure that the rights of underground space facilities are clearly defined and legally protected. Rights to use construction land in twodimensional space is extended to rights to use construction land (above), rights to use construction land (surface) and rights to use construction land (underground) in three-dimensional space. As to the situation whether there is boundary line or not, it is proposed to use contour points, plane boundary point and space boundary point to define the confirmation method of urban rail transit real estate spatial rights and the required measurement contents. This method has been successfully applied in the process of confirming the real estate spatial rights of platform in Shibi Station of Guangzhou Metro Line 7. It is practical and easy to popularize.