| 摘要 |
The invention relates to a method for installing a pre-fabricated unit (1), especially a pre-fabricated slab for constructing a ballastless track, whereby a plurality of successively arranged pre-fabricated units (1) form a section. Polygonal points (3) define an outer geometry of the course of the section. A measuring appliance, especially a tachymeter (4), is placed on a first polygonal point (3) and oriented in relation to at least one target point. The actual positions of a plurality of measuring points of the pre-fabricated unit (1) are measured, and compared with the nominal positions thereof, and the pre-fabricated unit (1) is installed according to the difference between the actual positions and the nominal positions. The invention also relates to a device for receiving at least one measuring vee (11), said device being arranged on a pre-fabricated unit (1), especially a pre- fabricated slab, for constructing a ballastless track, and comprising a measuring vee carrier (21,22) containing at least one measuring vee (11) at a pre-determined point of the pre-fabricated unit or at a pre- determined distance from said pre-fabricated unit (1). |
