Abstract: Systems and methods for raising a slab, such as a concrete slab, that has sunken and needs to be raised. In one injection, dried sand is carried in a stream of pressurized air and injected underneath the slab. The pressurized air raises the slab, and the dried sand is dispersed over a broad area and great distance underneath the slab to fill voids underneath the slab. Water is then injected underneath the slab for a predetermined period of time to wet the injected dried sand which stabilizes the injected sand and seals the injected sand to minimize or prevent air from passing through the injected sand. After the water injection, additional dried sand and pressurized air is injected underneath the slab to continue the slab lifting and filling of the void(s) underneath the slab.

Abstract: Provided is a viaduct structure. The viaduct structure consists of steel bridge columns, steel plate girders, a bridge deck bottom steel plate, bridge deck side steel plates and cement-gravel concrete, where the steel bridge columns, the steel plate girders and the bridge deck bottom steel plate are welded to one another to form the ceiling type steel architecture, the bridge deck side steel plates are welded to the bridge deck bottom steel plate, and the cement-gravel concrete is poured in a groove-like structure formed by the bridge deck side steel plates and the bridge deck bottom steel plate. The viaduct structure has the advantages of a firm structure, a thin bridge deck, the thin steel plate girders, a low height of the bridge deck, no plywoods required for pouring, convenient construction, low waste, a low material consumption, a low construction cost, a short construction period, etc.

Abstract: Systems and methods are described for forming a concrete trench drain channel using a slipform paving machine. The drain channel has frames that define an upper opening that can receive a grate. The slipform methods provide the slipform paving machine with moulds shaped to represent the external and internal profiles of the drain channel. One or more frames are installed in an abutting manner on a trestle that extends from the slipform paving machine so the frames are located at the upper opening of the inner profile of the drain channel in the internal mould. The slipform paving machine is actuated to continuously slipform the channel in concrete in between the exterior and interior moulds and around the frames. This process is repeated until the frames are at least partially embedded in the concrete and located across the opening of the drain channel.

Abstract: A manhole cover assembly includes a manhole cover supportable by a seat of a manhole frame and a latch assembly. The latch assembly includes a latch housing, a latch bar, and a padlock. The latch housing is fixedly coupled to the manhole cover and defines a channel that extends through the latch housing. The latch bar is coupled to the channel and is slidable relative to the latch housing between a locked position and an unlocked position. The padlock is operatively coupled to the latch bar and is configured to maintain the latch bar in the locked position.

Abstract: The tire spiker with an extendable handle may comprise a pair of spike portions pivotally connected by a spring loaded hinge adapted to hold the spike portions in a deployed U-Shaped configuration to be deployed in front of and behind a tire in a traffic stop. An extendable handle on the frame may have a release button adapted to release a latch holding the spike portions together in a carry configuration. The spring loaded hinge urges the spike portions in a spaced, parallel orientation for surrounding a tire in a deployed configuration. The tire spiker with extendable handle is moved to a position whereby the two spike portions are in front of and behind a tire. The spike portions have upward oriented spikes adapted to puncture the tire if the tire rolls forward or backwards.

Abstract: A bridge for a rail vehicle, including a track, which is formed from two parallel rails for being driven on by the rail vehicle, and including a bridge beam, which supports the rails of the track and is aligned transversely to a support profile of the bridge. The bridge beam is supported by a height adjustment element arranged between the support profile and the bridge beam, and the position of the bridge beam is fixed in relation to the height adjustment element by at least one fastening device. Exact positioning of the bridge beams at their target height is achieved by designing the height adjustment element as a single-piece block, whose height is adapted to the distance between the support profile and the bridge beam via material-removing processing. Preferably, the bridge beam and the height adjustment element consist of a plastic-based material, in particular a plastic-sand mixture.

Abstract: The preparation device includes an upper main conveyor belt, and an aggregate box, a first silane emulsion container and a first paper mill sludge container sequentially arranged above the upper main conveyor belt in a conveying direction. A lower auxiliary conveyor belt is arranged below the upper main conveyor belt, and a second paper mill sludge container and a second silane emulsion container are sequentially arranged between the upper main conveyor belt and the lower auxiliary conveyor belt in a conveying direction of the lower auxiliary conveyor belt. A trolley is arranged at the conveying tail end of the lower auxiliary conveyor belt, a gravity sensing device is arranged below the trolley, a mixer is arranged beside the trolley, and a heater is arranged at the bottom of the mixer.

Abstract: A guard for a seal of a wheeled industrial machine, the guard comprising an cylindrical, annular body having a first plate, a second plate with an upper portion and a lower portion, and a connecting portion extending between the first plate and the second plate; wherein the first plate extends in a radially inward direction from the connecting portion and includes a plurality of holes; wherein the upper portion is configured to extend into a corresponding slot of a rotating element of a wheel of the wheeled industrial machine; and wherein the lower portion is configured to extend toward an axle of the wheeled industrial machine.

Abstract: A vehicle arresting system includes a base layer, a carrier positioned and fixed by at least one fixation means on said base layer, a levelling layer, and a top layer. The base layer includes at least one compressible material. The base layer includes a bottom sublayer, a middle sublayer, and optionally an upper sublayer. The bottom sublayer includes a compressible material. The at least one fixation means fixedly attaches the carrier to the base layer. The levelling layer is positioned directly on and/or embedding said carrier, such that the levelling layer is in physical contact with said carrier.

Abstract: A dock leveler that fits within a loading dock. In some embodiments, the dock leveler may include a leg bracket assembly couplable to a back wall of the dock and a deck. The leg bracket assembly may include a deck hinge shaft. The deck may include a deck platform having a back end and a front end and a beam coupled to a bottom surface of the deck platform. The deck may include a C-shaped profile, a first end coupled to the bottom surface of the deck platform proximate to the back end, and a second end coupled to the bottom surface of the deck platform proximate to the front end.

Abstract: A dock leveler for a loading dock. In some embodiments, the dock leveler may include a leg, a deck hinge bracket coupled to a top portion of the leg, a first stock plate coupled to the deck hinge bracket, and a deck hinge shaft coupled to the first stock plate. The first stock plate may extend upward from the deck hinge bracket and may extend along at least a portion of the length of the deck hinge bracket.

Abstract: At least one of a method, apparatus, and system, as discussed herein and depicted in the figures that includes a first dock section, the first dock section including a first proximal end and a first distal end; a second dock section, the second dock section including a second proximal end and a second distal end; and a moveable guide system that connects the first dock section and the second dock section in a deployed position, such that the first proximal end of the first dock section abuts the second distal end of the second dock section, wherein the moveable guide system is configured to allow for the first dock section to be guided into a stowed position, on top of the second dock section.

Abstract: A central road safety barrier includes modules mutually couplable by means of a bolt which engages holes made in protrusions extending in a longitudinal direction at the ends of the modules. Walls adjacent to the protrusions improve the transfer between the modules of an impact of an errant vehicle on the barrier and improve response to an impact. The safety barrier provides an emergency openable passage. A module may include a wall solidly constrained to an upright and adjacent to the protrusions of the module on a first side of the barrier. An openable passage module has a further wall solidly constrained to a further upright and adjacent to the protrusions of the openable passage module on a second side of the barrier.

Abstract: A traffic intersection (100) comprising first and second approach portions (107, 108, 109, 110) configured to permit travel towards said intersection (100) only from first and second approach directions respectively, and first and second exit portions (111, 112, 113, 114) configured to permit travel away from said intersection (100) only in first and second exit directions respectively, wherein the intersection (100) is configured to direct approaching traffic from each approach portion to either exit portion.

Abstract: A screed assembly for a paving machine includes a screed plate, an end gate, and compression mechanisms. The screed plate paves a material to form a mat on a work surface. The end gate restricts a spread of the material in a lateral direction of the paving machine. The end gate includes a support structure and a floating wall. The support structure includes an engagement portion and the floating wall is slidably disposed relative to the support structure and is configured to be guided along the work surface during the paving operation. Further, each compression mechanism includes at least one compression member disposed in an engaged state with respect to at least one of the engagement portion and the floating wall. An actuation of the compression member moves the floating wall with respect to the screed plate to adjust a clearance between the floating wall and the screed plate.

Abstract: A roadway section comprises a body, a wireless battery charger, a leveling foot, and a thermal conduction coupler. The body includes rigid pavement. The wireless battery charger is embedded in the body and is configured to induce an electrical charge on a battery of a vehicle traveling on the roadway section. The leveling foot is embedded in the body and is configured to raise or lower a portion of the body with respect to the ground underneath the roadway section. The thermal conduction coupler is embedded in the body and extends between the wireless battery charger and the leveling foot.

Abstract: A concrete surface working machine includes a base portion and a screed head mounted at the base portion. The screed head includes a grade setting device and a vibrating element attached at a frame of the screed head. The screed head includes a rock tamper adjustably attached at the frame of the screed head via a pair of support elements. The screed head includes a pair of actuators that, when actuated, adjust the support elements to adjust the rock tamper relative to the frame. The concrete surface working machine is operable to position the vibrating element at the concrete surface. The actuators are selectively controlled by an operator of the concrete surface working machine to adjust a height of the rock tamper relative to the vibrating element and the concrete surface while the screed head is moved along the concrete surface.

Abstract: A composite box girder structure and a construction method therefore. The composite box girder structure includes a box enclosure and an inner core, the inner core includes a thin-walled steel shell, shear connectors, and diaphragms, and the thin-walled steel shell is attached and fixed to an interior of the box enclosure by means of the shear connectors. The inner core and the box enclosure of the composite box girder structure jointly load force, such that effectiveness of the structure in resisting a use load can be improved. The inner core is directly used as an internal template of UHPC, such that rapid bridge construction can be achieved. Further, not only defects of conventional pouring can be overcome, but problems of excessive lateral local stress, overall stability, cross-section distortion and shear bearing capacity of web plates can be solved.

Abstract: A method for operating a compactor on a compressible surface includes: moving the compactor on the compressible surface; receiving an operating speed of the compactor; determining whether an obstacle is present in a path of the compactor; and changing the operating speed to a creep speed if the obstacle is in the path of the compactor. The creep speed is sufficient to prevent the compactor from forming dips in the compressible surface.

Abstract: Electronic patch and crack sealing devices, assemblies, and methods. In one embodiment, a device for surface repair includes an application arm having an electrically-heated torch heating element and an interconnect end adjacent the electrically-heated torch heating element. The device may include at least one applier. In particular embodiments the applier is an interchangeable applier removably coupled to the interconnect end. The result may be an improved electrically-heated device and method for applying/manipulating a polymer asphalt binder and construction aggregate composition at a proper application temperature.