Patent ID: 6243994
Filing Date: 2001-06-12
Classification: E02D,E04B

Abstract:
A joint for pre-cast concrete twin-leaf arches for use in road building or the like in which a plurality of twin-leaf arch sections are used to form a large span comprising:two pre-cast concrete twin-leaf arch sections, each section including a crown area having an end and a central portion, and two side surfaces separated by a longitudinal dimension;initial contact areas on the ends of said crown areas of said arch sections that allow a controlled transmission of abutting forces;self-aligning and locking means on the ends of said arch sections for mechanically joining one arch section to the second arch section as said two arch sections are initially brought into contact with each other;step sections on opposite sides of said central portion of said arch sections for receiving cast-in-plate concrete;two further pre-cast twin-leaf arch sections, each of which has a crown area and two side surfaces separated by a longitudinal dimension and which are self-aligned and locked by a second self-aligning and locking means and which are positioned longitudinally adjacent to said two pre-cast concrete twin-leaf arch sections locked by said self-aligning and locking means; andarch connecting means in the crown areas of said locked arch sections and said further locked arch sections longitudinally connecting said two locked arch sections to said two further locked arch sections.