Patent ID: 7401371
Filing Date: 2008-07-22
Classification: E01C,E01D

Abstract:
1. A method of constructing an expressway in a form of an elevated road whose length extends at least partly above an existing motorway, said method comprising the steps of: forming a foundation portion for load-bearing supports; erecting the load-bearing supports on the foundation portion; placing girders on the load-bearing supports and forming a span structure; erecting the load-bearing supports on the foundation portion when arranging at least a portion of a technological equipment for construction of the expressway on an upper load-bearing working surface of a gantry-type mobile installation, which installation is self-propelled and consists of sections disposed in-series along its length; disposing mobile supports of said installation within an allocated land lot of the existing motorway; mounting the girders on the load-bearing supports with at least one hoisting mechanism used as the technological equipment; disposing said at least one hoisting mechanism of a mobile crane at least on one section of the gantry-type mobile installation, and a height of clearance under said installation, in its operation position, being sufficient for allowing traffic on the existing motorway; carrying out at least a part of the construction of the expressway such that traffic on the existing road may proceed; aligning a longitudinal axis of the elevated road, at least along a portion of its length, at an angle to a longitudinal axis of the existing motorway; mounting the span structure by laying pre-assembled sections of the span structure by the hoisting mechanism positioned on an already constructed portion of the elevated road; forming sections of the span structure by pulling over said pre-assembled sections; and using the upper load-bearing working surface of at least one section of the gantry-type mobile installation as an intermediate support for said pre-assembled sections.