Expansion joint

Claim 2

An expansion joint for adjacent roadway sections having a gap therebetween to allow expansion of said sections, said sections being recessed along their adjacent edges to form a groove along both sides of said gap, said joint comprising in combination a plate structure fixed to each section along the bottom of said groove, each of said plate structures having a support projection parallel to and spaced from said gap, said recessed sections supporting an expansion member extending into said grooves, said expansion member consisting of a joint strip of elastic material having free side surfaces, retaining ribs inset in said strip, said ribs each comprising a series of individual sections running in the longitudinal direction of the strip and each of individual sections being provided with at least one threaded bush, said bush having an axis arranged transversely to the expansion gap, said bushes each engaging with a tensioning bolt which bears freely and rotatably against a corresponding support projection in said groove, said plate structures having a support projection being fixed in the recessed sections comprising inlaid angleirons having the horizontal flanges thereof mounted on the floor of the recess, adjacent the expansion gap, and vertical flanges of angle-irons having holes for the tensioning bolts to pass through, said retaining ribs being arranged to be divergent towards the floor of the recess in relation to the vertical flanges of the angle-iron.

Claim 3

An expansion joint as defined in claim 1, said sections of the retaining ribs each having two outwardly facing threaded bushes which terminate at a short distance from the free side surfaces of the joint strip.

Claim 4

An expansion joint as defined in claim 1, said vertical flanges extending up to the surface of the structure and forming a continuous bearing surface for the free side surface of the joint strip.

Claim 5

An expansion joint as defined in claim 1, said threaded bushes each passing through an aperture in the retaining ribs.

Claim 6

An expasnion joint as defined in claim 1, said retaining ribs running parallel to the vertical flange of the angle-iron.

Claim 7

An expansion joint for adjacent roadway sections having a gap therebetween to allow expansion of said sections, said sections being recessed along their adjacent edges to form a groove along both sides of said gap, said joint comprising in combination a plate structure fixed to each section along the bottom of said groove, each of said plate structures having a support projection parallel to and spaced from said gap, said recessed sections supporting an expansion member extending into said grooves, said expansion member consisting of a joint strip of elastic material having free side surfaces, retaining ribs inset in said strip, said ribs each comprising a series of individual sections running in the longitudinal direction of the strip and each of individual sections being provided with at least one threaded bush, said bush having an axis arranged transversely to the expansion gap, said bushes each engaging with a tensioning bolt which bear freely and rotatably against a corresponding support projection in said groove, said plate structures having a support projection being fixed in the recessed sections comprising inlaid angle-irons having the horizontal flanges thereof mounted on the floor of the recess, adjacent the expansion gap, and vertical flanges of angle-irons having holes for the tensioning bolts to pass through, a further angle-iron being connected to the said angle-iron, the vertical flanges of each of said angle-iron and said further angle-iron lying against one another and having a common hole for the tensioning bolts to pass through, and the horizontal flange of the further angle-iron lying lower than that of the first angle-iron and being anchored in the roadway sections.

Claim 8

An expansion joint for adjacent roadway sections having a gap therebetween to allow expansion of said sections, said sections being recessed along their adjacent edges to form a groove along both sides of said gap, said joint comprising in combination a plate structure fixed to each section along the bottom of said groove, each of said plate structures having a support projection parallel to and spaced from said gap, said recessed sections supporting an expansion member extending into said grooves, said expansion member consisting of a joint strip of elastic material having free side surfaces, retaining ribs inset in said strip, said ribs each comprising a series of individual sections running in the longitudinal direction of the strip and each of individual sections being provided with at least one threaded bush, said bush having an axis arranged transversely to the expansion gap, said bushes each engaging with a tensioning bolt which bear freely and rotatably against a corresponding support projection in said groove, said plate structures having a support projection being fixed in the recessed sections comprising inlaid angle-irons having the horizontal flanges thereof mounted on the floor of the recess, adjacent the expansion gap, and vertical flanges of angle-irons having holes for the tensioning bolts to pass through, a further angle-iron being connected to the said angle-iron, the vertical flanges of each of said angle-iron and said further angle-iron lying against one another and having a common hole for the tensioning bolts to pass through, and the horizontal flange of the further angle-iron lying lower than that of the first angle-iron and being anchored in the roadway sections.

Claim 9

An expansion joint as defined in claim 6, between a surface coating of the structure and the joint insert strip there is provided a wedge-shaped striP of solid resilient material, which, optionally having an intermediate insulating plastic layer between the coating and the roadway sections, rests on the horizontal flange of the said further angle-iron.

Claim 10

An expansion joint as defined in claim 7, said wedge-shaped strip having recesses for the heads of the tensioning bolts.