Tunnel framing for poured concrete

Details Tunnel framing for poured concrete Tunnel framing for poured concrete

1974-12-30

1976-09-14

Taylor, Dennis L.

61 63, E21D 1514

Patent

active

039799190

ABSTRACT:
The present invention relates to improvements in U-shaped tunnel shutterings or framing for poured concrete constituted by two half shells in the form of a right-angled dihedron, of which the edges of upper horizontal panels are connected by clamping locks and each of said edges is connected to the bottom of a vertical panel by braces of adjustable length, the reduction in length of the braces determining a reduction in the angle of the dihedron; said shutterings may be used either in the form of a complete "U" with the two half-shells connected, in which case lower parts of the two vertical panels are connected by removable horizontal bars of adjustable length, or as half-shells in which case props are used which are articulated on the free edge of the horizontal panel and rest on the ground.

REFERENCES:
patent: 1226444 (1917-05-01), Barber
patent: 2749713 (1956-06-01), Paurat
patent: 3601996 (1971-08-01), Levy
patent: 3678693 (1971-07-01), Markewitz et al.

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