Prestressed roadway surface laying - is carried out in sections with internal prestress and gap filling strips between sections

摘要

Road surface building methods, where pre-stressed adjacent sections are used, so that it is not necessary to wait until the concrete of an anchoring section holding the prestress of the previous section sets. The anchoring section (5) is held apart by press (3) with shoes reaching into the thickness of the future section (5). The shoes are accommodated in cavities (6) to isolate them from the concrete poured on later. The sections already poured and set are provided with a tie rod assembly, the inner tie rod being a pressure rod the outer tie rod a tensile stress rod. When pressure is applied by press (3) the inner tie rods are removed and the section (5) is fitted with insert piece (11) after the inner rod has been removed and the outer rods are joined by welds (7). Following that, the section (5) is poured.