Pontoon bridge

FIELD: construction, road construction.

SUBSTANCE: invention is related to the field of bridge engineering and is intended for erection of pontoon bridges over water obstacles on a tight schedule and with the least material and labour expenses. It is achieved by the fact that pontoon bridge comprises pontoons open at the bottom, on which bridge supports are mounted to carry spans and road way, and spacers that connect peripheral parts of pontoon to fixed anchors on soil, and every pontoon is arranged in the form of packet of vertically oriented adjacent tanks that are inverted upwards with their bottoms and are connected to system of air supply and its pressure control in every of them, at that spacers are located on the opposite sides of pontoon to form triangular figures with every of them, which are oriented in crossing planes, and have dampers and/or control mechanisms, preferably with remote control, their stretching in process of bridge erection and/or its operation. At that vertically oriented tanks form rows of cells in section with horizontal plane, which are evenly located on at least part of section area.

EFFECT: higher reliability of pontoon bridge operation at different dynamic effect at it, also from wave and wind loads due to provision of stability in pontoons that carry spans and provision of their controlled submersion at specified depth.

4 cl, 2 dwg

 

The invention relates to the field of bridge construction and is intended to implement the construction of pontoon bridges across water obstacles in the shortest time and with the least material and labor costs.

Famous pontoon bridge containing the pontoons with the power cylinders and accessories to include actuators, ensuring elimination of the transverse inclination of the superstructure of the bridge is unbalanced when its loading, for which the said device is made in the form of a servo-mechanism housing and the spool, the housing is fixed in the guide with the possibility of vertical movement and rotation about a vertical axis and interacts with the rod of the power cylinder through the upper lever arm and the spool of the servo-mechanism associated with the pressure sensors water of the lower lever arm (USSR author's certificate No. 404920, CL E01D 15/04, 1973).

Famous pontoon bridge containing the superstructure mounted on the pontoons of variable volume due to mounted them in hydraulic lifts, which improves the operating characteristics of the pontoon and bridge as a whole (USSR author's certificate No. 1827406, CL E01D 15/04, 1993).

The closest known is the pontoon bridge, containing the superstructure, supported through the columns to open is taken from the bottom of the pontoons, with the possibility of partial immersion by filling with water and connected to the ground stretching (RF patent No. 2049846, CL E01D 15/04, 1995).

Known construction of pontoon bridges quite complex designs or do not provide reliable operation, even in the presence of fixing their marks.

The objective of the invention is to increase the operating reliability of a pontoon bridge at different dynamic effects on him, including wave and wind loads, by ensuring stability of the bearing span of the pontoons and ensure that regulated their dive to a given depth.

This is achieved by the fact that the pontoon bridge provides the open bottom of the pontoons, which are mounted overhead supports for the superstructure with the roadway, and stretch connecting the peripheral part of the pontoon with a fixed anchors on the ground, and each pontoon is made in the form of vertically oriented package and turned bottom upwards adjacent tanks connected to the system supply air into them and regulate its pressure in each of them, and stretch marks are located on opposite sides of the pontoon with the formation of each of these triangular shapes oriented in intersecting planes, and have dampers and/or regulatory mechanisms, preferably distanceindependent, their tension in the process of building the bridge and/or its operation. Thus, vertically-oriented vessel form in cross section the horizontal rows of evenly spaced, at least part of the cross-sectional area of cells. The pontoon bridge may be located along the coastline, preferably at equal distances from it. Or pontoon bridge can be located in terms of the chord subtending macroproject the shoreline.

Figure 1 shows the cross section of a pontoon bridge in the working position are connected by an anchor in the ground stretch marks forming on each longitudinal side of the pontoon triangular, preferably in intersecting planes, shapes.

Figure 2 is a fragment of the pontoon in the plan with stretch marks and dampers.

The pontoon bridge provides the open bottom of the pontoons 1, on which are mounted the bridge piers 2 in the form of columns or metal profile racks. On the top of the bridge piers 2 posted by the superstructure 3 of the road (or pedestrian) part. The pontoons 1 held stretch marks 4 connecting the peripheral part thereof with a fixed anchors 5 on the ground. Each pontoon 1 to ensure stability in the form of package (2) vertically oriented (their longitudinal axis) and turned bottom upwards adjacent (connected by walls or having a common wall) capacity is th 6. To regulate buoyancy, improve stability and reduce the magnitude of vibrations of the bridge, capacitance 6 reported interconnected through the system 7 of the regulation and distribution of air in them and are connected with the system 8 supply air into them. A vertically oriented container 6 is formed in the cross-section of the horizontal rows of evenly spaced, at least part of the cross-sectional area of cells 9. Stretch marks 4 are located on opposite sides of the pontoon 1 with the formation of each of these triangular shapes oriented in intersecting planes. On each side of the pontoon 1 stretch 4 form intersecting triangular shape that provides practical constancy of the position of the pontoon with a slight dynamic influence of, for example, waves. To reduce the dynamic effects and the exclusion of self-oscillations of the whole system floating bridge stretch marks 4 have mechanisms 10 remote adjustment of their length, made for example in the form of a winch or power cylinder, preferably with a block system with dampers 11.

Installation of a pontoon bridge can be made in any known manner in the shortest possible time, given the simplicity of its design and lack of necessary training grounds for them. It is advisable to extenuate the pontoons to the depth, while e is om their buoyancy, provide the location of the roadway of the bridge above the water level in the reservoir or in the sea. This is achieved by adjusting the amount of air in each pontoon. The presence of separate in terms of cells 9 eliminates the possibility of formation of waves in the cavity of the pontoon, as well as improves reliability by maintaining the required buoyancy in the event of damage to at least one of the walls of the pontoon, excluding its sinking or capsizing.

The proposal has been tested on the current model.

1. The pontoon bridge containing the open bottom of the pontoons, which are mounted overhead supports for the superstructure with the roadway, and stretch connecting the peripheral part of the pontoon with a fixed anchors on the ground, characterized in that each pontoon is made in the form of vertically oriented package and turned bottom upwards adjacent tanks connected to the system supply air into them and regulate its pressure in each of them, and stretch marks are located on opposite sides of the pontoon with the formation of each of these triangular shapes oriented in intersecting planes, and have dampers and/or regulatory mechanisms, preferably with remote control, tension in the process of building the bridge and/or its operation.

2. The pontoon bridge according to claim 1, characterized in that the Vert is unique targeted capacity form in cross section the horizontal rows of evenly spaced, at least part of the cross-sectional area of cells.

3. The pontoon bridge according to claim 1 or 2, characterized in that it is located along the coastline, preferably at equal distances from it.

4. The pontoon bridge according to claim 1 or 2, characterized in that it is located in terms of the chord subtending macroproject coastline.



 

Same patents:

FIELD: construction industry.

SUBSTANCE: ice crossing construction method refers to ice-technology industry, and can be used when designing ice crossing meant for load transportation. Snow shall be removed from ice surface, and the latter shall be covered with air-tight film. Space between ice surface and film is ventilated with fan cold ambient air. Cold air flow intensifies heat exchange on ice surface and provides its fast cooling, and thickness increase.

EFFECT: fast putting into operation of ice crossing.

1 dwg

FIELD: construction industry; bridges.

SUBSTANCE: method of pontoon bridge equipping at high flow speed is performed using set of railway pontoon ribbon bridge and differs in the fat that bridge stiffness on water obstacle is provided by anchors which are installed on bridge top and bottom sides and are attached to bottom of outer pontoons with the help of ropes which pass through lugs fixed on rings welded to deck and bottom of outer pontoons.

EFFECT: increasing vertical component of hydrodynamic forces, reducing the different of member to top or bottom sides, and improving pontoon bridge reliability.

3 dwg

FIELD: bridge construction, particularly floating bridges, for example, pontoon bridges.

SUBSTANCE: method involves unloading land-based and river-based pontoon sections on ice, expanding the pontoon sections in temporary bridge location area; sealing pontoons of each pontoon section by means of top and bottom jointing means; moving each pontoon section to temporary bridge construction site over ice; serially jointing pontoon sections with each other along temporary bridge length and breaking ice by blasting charges spaced from bridge axis. Longitudinal grooves are created in ice from each bridge side with the use of ice-cutters so that ice thickness in groove bottom area is not more than 10 cm. After that elongated charges including several detonating fuse strings are laid in the grooves. The grooves are filled with wet snow or water and elongated charges are blasted to break ice in each groove. After that ice under bridge sections is broken by vehicle movement over the bridge.

EFFECT: decreased time and increased safety of temporary bridge construction.

4 dwg

Motor unit // 2298507

FIELD: bridge crossing equipment; ferries and floating bridges.

SUBSTANCE: proposed motor unit includes displacement hull with joints in sides, engine mounted inside hull and water-jet propeller, two hinged pontoons which are articulated with hull and mechanism for opening and folding the pontoons. Each hinged pontoon is provided with torsion-loaded swivel hydrostatic shield on external side which is articulated with hinged pontoon in area of its bottom; hinged pontoons are also provided with mechanism for turning the shield; this mechanism is made in form of hydraulic cylinder with rod secured in hull of hinged pontoon. Thrust roller secured on end of rod is received by guide of hydrostatic shield.

EFFECT: reduced resistance of shuttle ferry due to improved streamlining of projecting lower part of motor unit.

5 dwg

FIELD: floating bridges, for instance temporary bridges for load transportation over ice.

SUBSTANCE: structure includes ice blanket in which vertical holes are drilled for the full bridge structure length so that the holes are located from both bridge sides. Reinforced concrete blocks connected to ropes are inserted through the holes so that the blocks are located under the ice blanket. Discs having diameters exceeding hole diameters are connected to upper block ends. Rope lengths are selected to prevent ice blanket movement in upward direction with respect to initial ice position if flexural-gravity waves are generated in ice blanket.

EFFECT: increased load-bearing capacity.

1 dwg

FIELD: movable or portable bridges, floating bridges adapted to convey loads over ice cover.

SUBSTANCE: method to transport vehicle having weight exceeding load-carrying ability of ice cover over ice involves moving vehicle having weight not exceeding load-carrying ability of ice cover at resonance speed; moving vehicle having weight exceeding load-carrying capacity to ice cover line when above vehicle having lesser weight has moved away from ice cover line for distance equal to 2/3 of resonance bending-gravity wave length; initiating above vehicle having larger weight movement with above resonance speed. Resonance bending-gravity wave length is determined from where D is cylindrical stiffness of ice plate, ρ and h - ice density and thickness, g - gravity, H - water body depth.

EFFECT: increased load-bearing capacity of ice cover.

1 dwg

Ice bridge // 2260648

FIELD: building, particularly to construct temporary roads across lakes and other water obstacles.

SUBSTANCE: ice bridge includes cooling plant, pipelines connected to cooling plant. Pipelines are submersed in water and suspended by wire ropes. Cooling plant has reducers for pressure reduction, 10 MPa gaseous nitrogen cylinders and liquid nitrogen cylinders adapted to fill pipelines with liquid and gaseous nitrogen mixture. The pipelines include several coiled sections or formed as straight and finned pipes. The pipelines are arranged in several rows and extend in vertical or horizontal directions. The pipelines are submersed for 0.1-5 m depth and are connected by wire ropes to balloons floating at water surface or to finned pipes driven in ground of river bottom and connected one to another by diaphragms. The cooling plant provides water freezing within 3-5 km range and obtains ice having thickness of 3 m or more.

EFFECT: increased water freezing rate.

5 dwg

FIELD: watercraft.

SUBSTANCE: invention can be used in designing ramp and propulsion and steering gear and their hydraulic systems. Novelty in proposed water craft is that it is furnished with streamlined carrying frame for fastening devices of propulsion and steering complex installed in hull aft part and formed by two pairs of rigid longitudinal beams hinge secured by inner ends of aft sheet of hull in zone located under loading side coupled by flexible cross beams in each pair and support bar between pairs. Hydraulic heads of propulsors are hinge-mounted on outer ends of each pair of longitudinal beams, being secured on said beams to form additional cross tie between beams. Carrying frame is furnished with power hydraulic cylinders connected with hydraulic system and installed to control position of heads and loading side by turning carrying frame in aft sheet hinge joints. Body of each is provided with upper roller support, being rolling support for each hinged loading side at its opening, and lower platform being rigid base interacting with ground at resting of hinged loading side on head body in loading position of loading side. Novelty in hydraulic system of watercraft is that it is furnished, in additional to propulsor control hydraulic cylinders, with hydraulic cylinders for setting ramps, changing thrust vector, fixing loading side and locking carrying frame. Each hydraulic cylinder, including propulsor position control hydraulic cylinders, are supplied through parallel hydraulic lines connected with main line, with electric control in each line. Invention contains description of design peculiarities of each line providing required modes of operation of watercraft.

EFFECT: improved performance of watercraft and creating of hydraulic system providing required mode of operation of watercraft.

9 cl, 11 dwg

The invention relates to bridge engineering, in particular to methods aiming floating bridges in the winter when there is ice cover

The invention relates to the production of ice and can be used for the reconstruction of crossings

FIELD: watercraft.

SUBSTANCE: invention can be used in designing ramp and propulsion and steering gear and their hydraulic systems. Novelty in proposed water craft is that it is furnished with streamlined carrying frame for fastening devices of propulsion and steering complex installed in hull aft part and formed by two pairs of rigid longitudinal beams hinge secured by inner ends of aft sheet of hull in zone located under loading side coupled by flexible cross beams in each pair and support bar between pairs. Hydraulic heads of propulsors are hinge-mounted on outer ends of each pair of longitudinal beams, being secured on said beams to form additional cross tie between beams. Carrying frame is furnished with power hydraulic cylinders connected with hydraulic system and installed to control position of heads and loading side by turning carrying frame in aft sheet hinge joints. Body of each is provided with upper roller support, being rolling support for each hinged loading side at its opening, and lower platform being rigid base interacting with ground at resting of hinged loading side on head body in loading position of loading side. Novelty in hydraulic system of watercraft is that it is furnished, in additional to propulsor control hydraulic cylinders, with hydraulic cylinders for setting ramps, changing thrust vector, fixing loading side and locking carrying frame. Each hydraulic cylinder, including propulsor position control hydraulic cylinders, are supplied through parallel hydraulic lines connected with main line, with electric control in each line. Invention contains description of design peculiarities of each line providing required modes of operation of watercraft.

EFFECT: improved performance of watercraft and creating of hydraulic system providing required mode of operation of watercraft.

9 cl, 11 dwg

Ice bridge // 2260648

FIELD: building, particularly to construct temporary roads across lakes and other water obstacles.

SUBSTANCE: ice bridge includes cooling plant, pipelines connected to cooling plant. Pipelines are submersed in water and suspended by wire ropes. Cooling plant has reducers for pressure reduction, 10 MPa gaseous nitrogen cylinders and liquid nitrogen cylinders adapted to fill pipelines with liquid and gaseous nitrogen mixture. The pipelines include several coiled sections or formed as straight and finned pipes. The pipelines are arranged in several rows and extend in vertical or horizontal directions. The pipelines are submersed for 0.1-5 m depth and are connected by wire ropes to balloons floating at water surface or to finned pipes driven in ground of river bottom and connected one to another by diaphragms. The cooling plant provides water freezing within 3-5 km range and obtains ice having thickness of 3 m or more.

EFFECT: increased water freezing rate.

5 dwg

FIELD: movable or portable bridges, floating bridges adapted to convey loads over ice cover.

SUBSTANCE: method to transport vehicle having weight exceeding load-carrying ability of ice cover over ice involves moving vehicle having weight not exceeding load-carrying ability of ice cover at resonance speed; moving vehicle having weight exceeding load-carrying capacity to ice cover line when above vehicle having lesser weight has moved away from ice cover line for distance equal to 2/3 of resonance bending-gravity wave length; initiating above vehicle having larger weight movement with above resonance speed. Resonance bending-gravity wave length is determined from where D is cylindrical stiffness of ice plate, ρ and h - ice density and thickness, g - gravity, H - water body depth.

EFFECT: increased load-bearing capacity of ice cover.

1 dwg

FIELD: floating bridges, for instance temporary bridges for load transportation over ice.

SUBSTANCE: structure includes ice blanket in which vertical holes are drilled for the full bridge structure length so that the holes are located from both bridge sides. Reinforced concrete blocks connected to ropes are inserted through the holes so that the blocks are located under the ice blanket. Discs having diameters exceeding hole diameters are connected to upper block ends. Rope lengths are selected to prevent ice blanket movement in upward direction with respect to initial ice position if flexural-gravity waves are generated in ice blanket.

EFFECT: increased load-bearing capacity.

1 dwg

Motor unit // 2298507

FIELD: bridge crossing equipment; ferries and floating bridges.

SUBSTANCE: proposed motor unit includes displacement hull with joints in sides, engine mounted inside hull and water-jet propeller, two hinged pontoons which are articulated with hull and mechanism for opening and folding the pontoons. Each hinged pontoon is provided with torsion-loaded swivel hydrostatic shield on external side which is articulated with hinged pontoon in area of its bottom; hinged pontoons are also provided with mechanism for turning the shield; this mechanism is made in form of hydraulic cylinder with rod secured in hull of hinged pontoon. Thrust roller secured on end of rod is received by guide of hydrostatic shield.

EFFECT: reduced resistance of shuttle ferry due to improved streamlining of projecting lower part of motor unit.

5 dwg

FIELD: bridge construction, particularly floating bridges, for example, pontoon bridges.

SUBSTANCE: method involves unloading land-based and river-based pontoon sections on ice, expanding the pontoon sections in temporary bridge location area; sealing pontoons of each pontoon section by means of top and bottom jointing means; moving each pontoon section to temporary bridge construction site over ice; serially jointing pontoon sections with each other along temporary bridge length and breaking ice by blasting charges spaced from bridge axis. Longitudinal grooves are created in ice from each bridge side with the use of ice-cutters so that ice thickness in groove bottom area is not more than 10 cm. After that elongated charges including several detonating fuse strings are laid in the grooves. The grooves are filled with wet snow or water and elongated charges are blasted to break ice in each groove. After that ice under bridge sections is broken by vehicle movement over the bridge.

EFFECT: decreased time and increased safety of temporary bridge construction.

4 dwg

FIELD: construction industry; bridges.

SUBSTANCE: method of pontoon bridge equipping at high flow speed is performed using set of railway pontoon ribbon bridge and differs in the fat that bridge stiffness on water obstacle is provided by anchors which are installed on bridge top and bottom sides and are attached to bottom of outer pontoons with the help of ropes which pass through lugs fixed on rings welded to deck and bottom of outer pontoons.

EFFECT: increasing vertical component of hydrodynamic forces, reducing the different of member to top or bottom sides, and improving pontoon bridge reliability.

3 dwg

FIELD: construction industry.

SUBSTANCE: ice crossing construction method refers to ice-technology industry, and can be used when designing ice crossing meant for load transportation. Snow shall be removed from ice surface, and the latter shall be covered with air-tight film. Space between ice surface and film is ventilated with fan cold ambient air. Cold air flow intensifies heat exchange on ice surface and provides its fast cooling, and thickness increase.

EFFECT: fast putting into operation of ice crossing.

1 dwg

Pontoon bridge // 2351706

FIELD: construction, road construction.

SUBSTANCE: invention is related to the field of bridge engineering and is intended for erection of pontoon bridges over water obstacles on a tight schedule and with the least material and labour expenses. It is achieved by the fact that pontoon bridge comprises pontoons open at the bottom, on which bridge supports are mounted to carry spans and road way, and spacers that connect peripheral parts of pontoon to fixed anchors on soil, and every pontoon is arranged in the form of packet of vertically oriented adjacent tanks that are inverted upwards with their bottoms and are connected to system of air supply and its pressure control in every of them, at that spacers are located on the opposite sides of pontoon to form triangular figures with every of them, which are oriented in crossing planes, and have dampers and/or control mechanisms, preferably with remote control, their stretching in process of bridge erection and/or its operation. At that vertically oriented tanks form rows of cells in section with horizontal plane, which are evenly located on at least part of section area.

EFFECT: higher reliability of pontoon bridge operation at different dynamic effect at it, also from wave and wind loads due to provision of stability in pontoons that carry spans and provision of their controlled submersion at specified depth.

4 cl, 2 dwg

FIELD: transport, construction.

SUBSTANCE: method of producing ice ferry consists in cleaning ice surface of snow, placing a layer of heat-isolation material through the cut, along the ice ferry routed, and pressing aforesaid layer to the ice layer lower surface. A continuous layer of ice floats is placed between the ice surface lower surface and the said heat-isolation material.

EFFECT: higher load-carrying capacity of ice ferry.

Up!