# US 2010/0175205 A1 · Scaffold Arrangement and Method for Repairing the Edge Structure of a Concrete Bridge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0175205 A1 - Document ID: US20100175205A1 - Status: Published application - Kind: A1 - Application number: 12/597,622 - Filed: 2008-04-24 - Published: 2010-07-15 - Earliest claimed: 2007-04-27 - Assignees: Moldtech Oy - Inventors: Tomas Alberto Jorkama-Lopez; Hannu Ojantausta - Web page: https://patentgrep.com/patent/US20100175205A1 ## CPC - E01D 22/00: Methods or apparatus for repairing or strengthening existing bridges {(electrochemical desalination or re-alkalisation C04B41/00); Methods or apparatus for dismantling bridges} - E01D 19/106: {Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges (lifting devices for movable platforms on vehicles in general B66F11/04)} - E04G 13/06: for stairs, steps, cornices, balconies, or other parts corbelled out of the wall {(moulds for making prefabricated stair units B28B7/225; stairways with permanent forms E04F11/02)} - E04G 13/066: {for overhangs} - E01D 2101/26: reinforced - E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005}) - E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS ## Abstract A scaffold arrangement for repairing the edge structure of a concrete bridge. A steel-structured bent comprises a vertical beam that can be anchored by support members to the upper surface of the bridge. The vertical beam extends to a distance above the upper surface of the bridge. An upper horizontal beam is rigidly secured to the upper end of the vertical beam and the horizontal beam extends substantially transversely relative to the longitudinal direction of the bridge and over the edge of the bridge. A vertical column is secured to the end of the upper horizontal beam. The lower end of the vertical column extends down from the edge of the bridge. A lower horizontal beam is secured to the vertical column and extends in alignment with the upper horizontal beam. The lower horizontal beam comprises a first beam portion extending from the vertical column to a distance below the bridge so that mould walls can be fitted onto the first beam portion, and a second beam portion extending from the vertical column to an opposite direction relative to the first beam portion and supporting an access bridge. A longitudinally adjustable support bar is pivotally connected at one end to the first beam portion and at the other end is supportable against the lower surface of the bridge. ## Claims ### Claim at position 1 1-25. (canceled) ### Claim 26 A scaffold arrangement for repairing the edge structure of a concrete bridge, the arrangement comprising: a number of bents arranged at a distance from each other over the length of the portion of the bridge that needs to be repaired and supported onto the edge of the bridge, comprising support members for supporting the bent onto the bridge, mould walls supported onto the bents in order to form a concrete casting mould for casting a new edge structure for the bridge, and an access bridge supported onto the bents in order to form a passage and a working platform for the duration of the repair period, wherein the bent comprises: a first beam portion extending to a distance below the bridge, so that said mould walls can be fitted onto the first beam portion, a second beam portion extending to an opposite direction relative to the first beam portion and supporting the access bridge, and a longitudinally adjustable support bar pivotally connected at one end to the first beam portion and being at the other end supportable against the lower surface of the bridge. ### Claim 27 (depends on 26) The arrangement according to claim 26, wherein the bent further comprises: a vertical beam which is substantially vertical and in which vertical beam the lower end can be anchored to the upper surface of the bridge by said support members to a distance from the edge of the bridge that needs to be repaired, the vertical beam extending to a distance above the upper surface of the bridge, an upper horizontal beam in which the first end is rigidly secured to the upper end of the vertical beam, the horizontal beam extending from the vertical beam substantially horizontally and substantially transversely relative to the longitudinal direction of the bridge in such manner that the second end of the upper horizontal beam extends over the edge of the bridge to a distance from the edge of the bridge, and a vertical column, secured vertically at the upper end to the second end of the upper horizontal beam, the lower end of the vertical column extending to a distance down from the edge of the bridge, and lower horizontal steel beam secured rigidly to the vertical column and extending from the vertical column substantially horizontally and substantially transversely relative to the longitudinal direction of the bridge. ### Claim 28 (depends on 27) The arrangement according to claim 27, wherein the lower horizontal beam comprises the said first beam portion and said second portion which extend from the vertical column. ### Claim 29 (depends on 27) The arrangement according to claim 27, wherein any of the vertical beam, the horizontal beam and the vertical column is made of steel. ### Claim 30 (depends on 27) The arrangement according to claim 27, wherein in that rigidly secured to the lower end of the vertical beam is a mounting flange comprising long holes which extend substantially transversely relative to the longitudinal direction of the bridge, so that anchor bolts can be secured through the long holes to the bridge. ### Claim 31 (depends on 27) The arrangement according to claim 27, wherein the bent comprises a suspension member which can be grabbed by a grabbing member of a lifting device, such as a lifting hook, and which suspension member is arranged to be offset from the mass centre of the bent, so that when lifted by the suspension members, the bents are tilted in such manner that during mounting of the bents, the mounting flange is first supported at the edge to the upper surface of the bridge at a contact point, and as the bent is lowered further the mounting flange turns about said contact point until it is in alignment with the upper surface and rests against it. ### Claim 32 (depends on 26) The arrangement according to claim 26, wherein each bent comprises a holder, the level of which can be vertically adjusted, and that the mould walls can be supported onto the holders. ### Claim 33 (depends on 32) The arrangement according to claim 32, wherein the holder comprises an adjustment member for moving the mould walls horizontally. ### Claim 34 (depends on 26) The arrangement according to claim 26, wherein the mould walls comprise at least one horizontal mould wall limiting the casting in a downward direction and at least one vertical mould wall limiting the casting in a lateral direction. ### Claim 35 (depends on 27) The arrangement according to claim 27, wherein the bent comprises a vertical support connected to the upper horizontal beam to a distance from the vertical beam and adapted to operate as a supporting foot for the bent during mounting. ### Claim 36 (depends on 35) The arrangement according to claim 35, wherein the second vertical mould wall is connected to the vertical support. ### Claim 37 (depends on 26) A method for repairing the edge structure of a concrete bridge, in which method the scaffold arrangement according to claim 26 is mounted to the edge of the bridge, the scaffold arrangement comprising bents at a distance from each other over the length of the bridge, the bents comprising support members for supporting the bent onto the bridge, mould walls are supported onto the bents in order to form a concrete casting mould for casting a new edge structure, and an access bridge forming a passage for the duration of the repair period is formed onto the bents, and in which method the scaffold arrangement is supported onto the lower surface of the bridge by longitudinally adjustable support bars, wherein the bents are fixedly anchored by the support members to the upper surface of the bridge to a distance from the edge of the bridge that needs to be repaired. ### Claim 38 (depends on 37) The method according to claim 37, wherein the bent is moved to its position to the edge of the bridge that needs to be repaired by lifting it in a tilted position by suspension members in such manner that the edge of the bridge is set between mounting flanges and holders, the tilted bent is lowered so that the mounting flange comes into contact with the upper surface of the bridge, the bent is lowered further so that the mounting flange becomes aligned with the upper surface of the bridge, the mounting flange is secured by anchor bolts to the upper surface of the bridge, and the bent is supported onto the lower surface of the bridge by the longitudinally adjustable support bars. ### Claim 39 (depends on 38) The method according to claim 38, wherein in securing the mounting flange to the upper surface of the bridge, the position of the bent is adjusted by placing wedges between the mounting flange and the upper surface of the bridge. ### Claim 40 (depends on 37) The method according to claim 37, wherein a horizontal mould wall and a first vertical mould wall are supported onto the holders, and optionally a second vertical mould wall is also supported onto a vertical support, the edge of the horizontal mould wall is positioned tightly against the lower surface of the bridge, the first vertical mould wall is supported against vertical columns and, at the lower end, tightly against the horizontal mould wall, and it is moved horizontally to a distance from the remaining edge of the bridge after the removal of the old concrete, optionally, a vertical support is adjusted horizontally in order to position the second vertical mould wall, and it is locked in position by locking means, and the new edge beam or other edge extension is cast from concrete into the space bounded by the first vertical mould wall, the horizontal mould wall, the optional second vertical mould wall and the remaining edge of the bridge after the removal of the old concrete. ### Claim 41 (depends on 40) The method according to claim 40, wherein after hardening of the cast concrete holders are lowered by the lifting device in order to detach the horizontal mould wall from the cast edge beam or other extension, support bars are loosened, anchor bolts are loosened so that the mounting flange can be moved horizontally relative to the upper surface of the bridge, optionally, the second vertical mould wall is moved off from the cast edge beam by moving the vertical support, and the bents are moved transversely relative to the longitudinal direction of the bridge within the limits set by long holes of the mounting flange in order to detach the first vertical mould wall from the cast edge beam or other extension. ### Claim 42 (depends on 41) The method according to claim 41, wherein the vertical mould walls are removed, holders are lowered by the lifting device and the horizontal mould wall is removed from the holders, the access bridge is removed from the bents, the support members, such as the anchor bolts are removed, and the bents are moved away from the edge of the repaired bridge by grabbing suspension members and lifting the bents away from the edge of the bridge. ### Claim 43 A scaffold arrangement for repairing the edge structure of a concrete bridge, the arrangement comprising: a number of bents arranged at a distance from each other over the length of the portion of the bridge that needs to be repaired and supported onto the edge of the bridge, comprising support members for supporting the bent onto the bridge, mould walls supported onto the bents in order to form a concrete casting mould for casting a new edge structure for the bridge, and an access bridge supported onto the bents in order to form a passage and a working platform for the duration of the repair period, wherein the bent comprises: a vertical steel beam which is substantially vertical and in which vertical beam the lower end can be anchored to the upper surface of the bridge by said support members to a distance from the edge of the bridge that needs to be repaired, the vertical beam extending to a distance above the upper surface of the bridge, an upper horizontal steel beam in which the first end is rigidly secured to the upper end of the vertical beam, the horizontal beam extending from the vertical beam substantially horizontally and substantially transversely relative to the longitudinal direction of the bridge in such manner that the second end of the upper horizontal beam extends over the edge of the bridge to a distance from the edge of the bridge, a vertical steel column, secured vertically at the upper end to the second end of the upper horizontal beam, the lower end of the vertical column extending to a distance down from the edge of the bridge, and a lower horizontal steel beam secured rigidly to the vertical column and extending from the vertical column substantially horizontally and substantially transversely relative to the longitudinal direction of the bridge, the lower horizontal beam comprising: a first beam portion extending from the vertical column to a distance below the bridge, so that said mould walls can be fitted onto the first beam portion, and a second beam portion extending from the vertical column to an opposite direction relative to the first beam portion and supporting the access bridge, and a longitudinally adjustable support bar pivotally connected at one end to the first beam portion and being at the other end supportable against the lower surface of the bridge. ### Claim 44 (depends on 43) A method for repairing the edge structure of a concrete bridge, in which method the scaffold arrangement according to claim 43 is mounted to the edge of the bridge, the scaffold arrangement comprising bents at a distance from each other over the length of the bridge, the bents comprising support members for supporting the bent onto the bridge, mould walls are supported onto the bents in order to form a concrete casting mould for casting a new edge structure, and an access bridge forming a passage for the duration of the repair period is formed onto the bents, and in which method the scaffold arrangement is supported onto the lower surface of the bridge by longitudinally adjustable support bars, wherein the lower ends of vertical beams of the bents are fixedly anchored by the support members to the upper surface of the bridge to a distance from the edge of the bridge that needs to be repaired.