Method for temporary winter bridge construction

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

 

The invention relates to the field of bridge construction, and more particularly to the formation of crossings of the pontoon bridges.

There is a method of education bridge crossing in winter (see Guidance for engineer troops. Heavy pontoon Park chamber of Commerce. Voenizdat, 1955, s), including the unloading of the pontoons on the ice at the site of the bridge, the movement of each pontoon on ice to the place of installation, the closure of the pontoons, the Assembly on the pontoons of the superstructure and propilivanie or laying end-to-end grooves in the ice around each pontoon.

The disadvantages of this method of education bridge crossing in winter are great complexity and duration of operations by destruction of the ice around the pontoons.

There is also known a method of forming bridge crossing in winter (prototype - see Guide pontoon-bridge Park RAP. Voenizdat, 1965, s-263), including unloading coastal and river pontoon links on the ice and disclosure at the site of the bridge, snapping pontoons, each pontoon link through the deck and bottom joints, moving each pontoon link on ice to the place of installation, the sequential closing of the links along the length of the bridge and the destruction of the ice explosions charges, spaced from the axis of the bridge.

The disadvantages of this method of education bridge crossing in winter are much trudem is here and the warm-up to an explosion of ice operations, as well as increased risk of blasting operations are in progress. For destruction ice in it with axes, crowbars or picks you need to make the hole, collect electroexplosive network, drop into the hole at some depth charges, explosive substances and produce their undermining.

The objective of the invention is to reduce the complexity and duration of operations by destruction of the ice and improve safety by education bridge crossing.

The solution of the stated problem is achieved in that in the method of forming bridge crossing in winter, including unloading coastal and river pontoon links on the ice and disclosure at the site of the bridge, snapping pontoons, each pontoon link through the deck and bottom joints, the movement of each link on ice to the place of installation, the sequential closing of the links along the length of the bridge and the destruction of the ice explosions charges, spaced from the axis of the axle, on each side of the bridge in ice form, for example, using an ice-cutter longitudinal grooves, the thickness of the ice remaining in each furrow, should be no more than 10 see, then, in the furrow laid elongated charges from several strands of detonating cord, fill in the furrow or score sleet and undermine long charges, destroying the ice in each furrow, then pass equipment on the bridge will asresult ice under the bridge units.

The use of the proposed method of education bridge crossing in winter will reduce to 2-3 times the ready time of the terminal to pass troops and significantly improve the safety of operations.

The invention is illustrated by drawings, which depict: figure 1 is a diagram of the Assembly of the bridge on the ice surface; figure 2 - is a floating bridge, assembled on ice; figure 3 - section a-a in figure 2; figure 4 - node 1 in figure 3.

Education bridge crossing in the winter of the proposed method is carried out in the following order. Pontoon units 1 unload the original shore on the ice with pontoon hire 2 at the site of the bridge. Each uploaded on ice pontoon link open with two cars 3 and 4 and at the bottom of the pontoons link between a through deck and bottom joint. Then the parts move on the ice for towing vehicles 5 to the opposite shore and consistently close links along the length of the bridge. The first serves to the opposite shore shore pontoon link 6, and then the river pontoon links. The closing of links between them is performed using the winch vehicle 7, which moves on harvested land bridge and tightens to its extreme link next link. After the Assembly of the bridge with each hand in ice form cont the major grooves 8 and 9, for example, using an ice-cutter 10 towing vehicle 11. The depth of the groove should be such that the thickness of the remaining ice did not exceed 10 cm In the furrow laid elongated charges 12 made of 4-5 strands of detonating cord, tied with twine 30-40 cm For ease of use made the charges wound on the reels. Furrow laid with extra charges pour water through holes 13, punched in each furrow 40-50 m score or sleet. After this long charges of undermining and destroying the remaining ice in the furrow, and then pass over the bridge technique, destroying the ice pontoon links. After crossing the bridge dismantled, the parts folded and loaded on the cars.

The method of forming bridge crossing in winter, including unloading coastal and river pontoon links on the ice and disclosure at the site of the bridge, snapping pontoons, each pontoon link through the deck and bottom joints, the movement of each link on ice to the place of installation, the sequential closing of the links along the length of the bridge and the destruction of the ice explosions charges, spaced from the axis of the axle, characterized in that on each side of the bridge in ice form, for example, using an ice-cutter, longitudinal grooves, the thickness of the ice remaining in each furrow, should the no more than 10 cm, then in the furrow laid elongated charges from several strands of detonating cord, fill in the furrow or score sleet and undermine long charges, destroying the ice in each furrow, then pass equipment on the bridge destroy the ice under the bridge units.



 

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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.

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EFFECT: increased load-bearing capacity.

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

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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.

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FIELD: watercraft.

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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

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The invention relates to the field of construction of bridges, and more particularly to a tip floating bridges

The invention relates to the field of construction of bridges, and more particularly to a tip floating bridges

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.

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EFFECT: increased water freezing rate.

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EFFECT: increased load-bearing capacity of ice cover.

1 dwg

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

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EFFECT: increased load-bearing capacity.

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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.

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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.

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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.

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4 cl, 2 dwg

FIELD: transport, construction.

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EFFECT: higher load-carrying capacity of ice ferry.

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