RU2692363C1 - Method for docking of river parts of floating bridges mlzh-vf-vt and nzhm-56 - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention can be used when guiding combined floating railroad bridges from different types of property of MLZH-VF-VT and NZHM-56 pontoon parks. Method for docking of river sections of floating bridges MLZH-VF-VT and NZHM-56, including reinforcement (widening) of butt section of MLZH-VF-VT over five river links by additional P-pontoons with installation of inserts of longitudinal joint device of MT9 grade and reinforcement of butt section of NZHM-56 with double pontoons under sections of span structures, as well as connection of river parts of bridges to single floating system through special connecting beam on bolts to section of span structure of NZHM-56 through flange corners and L-shaped straps and by means of rods of longitudinal attachment of piers MLZH-VF-VT and NZHM-56 to each other with providing connection and transfer from high level on span structure of NZHM-56 to lower level of deck of MLZH-VF-VT railway passage by installation on rails of pontoons of PR blocks of ramp with preliminary laying on rails of strip (laying) from same rough polymeric material united with the connecting bolt between a beam and by means of flanged units, as well as with the piers MLZH-VF-VT through special ramp fastening beams, which are shortened pontoons of BPR, BP, BK brands and bridge-tapes of the appropriate brands (PR, P, K) built between standard pontoons, as well as arrangement of through passage of wheeled and crawler vehicles from separate road passage NZHM-56 to deck of pontoons P and PR of MLZH-VF-VT installation between bridges of different design of shortened section of road passage and installation on deck of pontoons of brand P ramp for entry (exit) of cars, wheeled and crawler vehicles at level of road passage NZHM-56, as well as creation of comfortable operating conditions for operating personnel by metal ladders on sides of ramp for lifting from level of deck MLZH-VF-VT to level of lower parts of top of connecting beam (sidewalks on sides of span structure of NZHM-56) and device of inner-roller sidewalk flooring on ramp.

EFFECT: disclosed is a method of docking of river parts of floating bridges MLZH-VF-VT and NZHM-56.

1 cl, 9 dwg

Description

The claimed invention relates to the field of military bridge building and can be used when hovering combined floating railway bridges from different types of property of MLH-VF-VT and NZhM-56 pontoon parks.

The problem to which the invention is directed, is to provide docking of river parts of floating bridges of various designs MLG-VF-VT and NZhM-56 in the flow of the watercourse directly to each other (without sections of transitional and coastal parts of floating bridges on rigid supports).

The problem is solved by interfacing railway rails of different types of floating bridges across a ramp of different levels with respect to water. The ramp is mounted on the broadened butt section of the bridge ferry MLZH-VF-VT and connects with it through special fixing beams. Attachment beams are shortened pontoons MLS-WF-VT, embedded between river links. Thereby, the bearing capacity and strength characteristics of the bridge-tape are maintained throughout the river part. The docking of the ramp with the span structure of the NZhM-56 is carried out through a connecting beam of a special design, mounted on the transom of the MLH-VF-VT pontoons. A separate road passage NZHM-56 is connected with the carriageway along the deck of the MLH-VF-VT pontoons with a ramp for wheeled and tracked vehicles.

The invention is illustrated in figures 1-9.

The figure 1 shows the facades (side views) of river links floating bridges, which must be docked.

pos. 1 - river link (middle pontoon with the rail of the brand PR) MLG-VF-VT;

pos. 2 - river link NZHM-56 with a block of superstructure, installed directly on the pontoons (without superstructures);

pos. 3 - the magnitude of the excess of the level of the rail head on the floating bridge NZHM-56 above the rail head on the floating bridge MLH-VF-VT without a temporary load (about 1.10-1.20 m).

The figure 2 shows the pattern of docking afloat in the riverbed of the river parts of the bridge MLZH-VF-VT and NZHM-56:

pos. OL - middle pontoon with rail of PR brand;

pos. P - middle pontoon without rail grade P;

pos. K - extreme pontoon mark;

pos. 4 - the river part of the MLSF-VF-VT, assembled under load according to the VF scheme;

pos. 5 - river link MJL-WF-W, collected under the load according to the W scheme;

pos. 6 - the broadening of the river part of the MML-VF-VT with middle ponts of the P or PR brand;

pos. 7 - connecting beam of the river part of the MML-VF-VT with a ramp and the span of the NZHM-56;

pos. 8 - ramp for the exit (entry) of the rolling stock from the spans of the NZhM-56 to the deck of the LVL-VF-VT;

pos. 9 - ramp attachment beam;

pos. 10 - the river part of the NZHM-56;

pos. 11 - NZHM-56 road passage;

pos. 12 - ramp of entry (exit) of wheeled and tracked vehicles from the MLH-VF-VT deck to the NZhM-56 road passage;

pos. 13 - longitudinal attachment of pontoons MLZH-VF-VT and NZhM-56 to each other;

pos. 14 - liner longitudinal joint device brand MT9;

pos. 15 - a delay with a lanyard for fixing a ramp of a motorway for figured overlays located on the deck of P (PR) pontoons;

pos. 16 - route (axis) of the motion of wheeled and tracked vehicles;

pos. 17 - ascent from the deck of the MFL-VF-VT to the connecting beam (sidewalk flooring of the span structure NZhM-56);

pos. 18 - twin pontoons installed under the section of the superstructure NZHM-56;

pos. 19 - shortened section of the NGM-56 road passage.

To simplify the design of the joint of the river parts of the combined bridge bridge MLN-VF-VF - NZHM-56 railway passage (blocks of span structures) NZHM-56 (pos. 10) is installed directly on the pontoons. Docking is provided by the equipment of standard inventory sets of both bridges with additional elements.

The bridge ferry NZHM-56, adjacent to the junction, is reinforced by twin pontoons (pos. 18) under the sections of the superstructures. A shortened section of the road passage (pos. 19) is made, connecting the passage along the NZHM-56 with the deck of the LVJ-VF-VT. On the false sections of the pontoon sections, from the side adjoining the joint, places are prepared for fixing the pontoon fasteners (pos. 13) of different types of bridges to each other. For the docking of the block of the span structure NZHM-56 with a connecting beam, in addition to the flange corners, L-shaped overlays of the upper and lower belts of the beams of the span are made, as well as shortened flat plates.

The main part of the additional structural elements providing docking of the river parts of different types of floating bridges is mounted on the mating part of the LVJ-VF-VT. Structural elements of the standard set of pontoon park remain unchanged. The broadening of the mating section MJL-VF-VT increases the carrying capacity of river links and reduces the load on the butt structures. Also provided are the dimensions of the road passage when switching traffic from the axis of the bridge along the MLZH-VF-VT to a separate road passage NZHM-56 (position 16) that is offset from the axis of the bridge. The broadening is performed at two sites. The first section consists of one wide link, assembled under the load according to the VT scheme (pos. 5). The second section consists of four symmetric, widened sections of a special design (two medium pontoons with a rail of the PR brand, six medium pontoons without a rail of the P brand, two extreme pontoons of the K brand). The rigidity of the joint section and the river links adjacent to it is ensured by installing liners for the longitudinal deck joint MT9 (pos. 14).

In connection with the need to attach the ramp (pos. 8) to the MLS-VF-VT deck and the inability to mount directly to the pontoons, special structural elements - beams (pos. 9) embedded between the pontoons are used. MLZH-VF-VT according to its system is a bridge-tape (the river part is a single continuous floating beam). This means that the ramp mounting beams installed between the pontoons, along with the fixation of additional equipment, must simultaneously be the structural elements (pontoons) of the bridge-tape. Beams must have the same buoyancy and strength as the pontoons between which they are embedded. Based on the principle of universality of the structures included in the pontoon park, beams are used, which are the pontoons of the LVL-VF-VT of the minimum length. Their length is determined based on the placement of the bottom and deck longitudinal and transverse butt devices with their drives.

Fixing the ramp is performed only by those beams that are mounted between the middle pontoons with the rail of the PR brand, all at the joint of the MLZH-VF-VT - NZhM-56, 4 such beams are necessary (the BPR brands). The support plate for mounting the ramp is combined with the BPR beam by bolts or welding. Between the middle pontoons without the rail of the brand P, a beam of the BP brand is applied (without the rail and the ramp support plate). Such beams need 12 pieces. Filling the gap between the extreme pontoons of the brand K is carried out by beams of the BC brand (4 beams are necessary). The total length (along the axis of the bridge) of all types of ramp mounting beams is the same - approximately 2.40 m.

The figure 3 shows the General types of beams mounting ramp brands BPR, BP, BK, embedded in the line bridge MLH-WF-VT, respectively, between the pontoons brands PR, P, K:

pos. a - beam mounting ramp brand BPR;

pos. b - beam mounting ramp brand BP;

pos. in - a beam of fastening of a ramp of the BK brand;

pos. 20 - deck beams brand BPR;

pos. 21 - side of the beam brand BPR;

pos. 22 - rail P-50;

pos. 23 - inspection hatch;

pos. 24 - plate for supporting the lower girder of the ramp;

pos. 25 - the location of the mounting bolts of the lower belt of the main beam of the ramp;

pos. 26 - deck of the beam of the BP brand;

pos. 27 - side of the beam of the brand BP;

pos. 28 - rail niche (without rail);

pos. 29 - deck of the GK brand beam;

pos. 30 - sideboard of the BC beam;

pos. 31 - fairing shield in the transport (folded) position;

pos. 32 - guide skid thrust shield-fairing;

pos. 33 - locking device for fixing the upper section of the shield-fairing in the transport position on the deck of the beam.

The figure 4 presents the section of the span of the floating bridge NZHM-56, which must be docked with the connecting beam:

pos. g - view from the facade of the bridge;

pos. e - horizontal plan and section;

pos. e - end view;

pos. 34 - holes for fastening rails with a track span of 1435 mm;

pos. 35 - holes for fastening the rails with a span of 1520 mm;

pos. 36 - holes for the bolts of the rigid joint of the upper and lower belts;

pos. 37 - holes for mounting bolts to the superstructure of the pontoon;

pos. 38 - holes for fastening sidewalk consoles;

pos. 39 - holes in the flange corners for the bolts of the rigid joint of the beam wall;

pos. 40 - holes for fastening the section to one pontoon;

pos. 41 and pos. 43 - holes for fastening the section on two pontoons;

pos. 41 and pos. 42, pos. 42 and pos. 43 - mounting holes for supporting parts.

The rigid (continuous) joint of the sections of the railway span of the floating bridge NZhM-56 is provided by connecting flanges of the vertical wall and butt plates (short and long) on the belts. The design of the rigid (continuous) joint of the railway span of the floating bridge NZHM-56, the elements of which are used for joining with the connecting beam, is shown in figure 5:

pos. g - facade;

pos. h - top view and horizontal section;

pos. and - butt plates;

pos. M52 - butt pad long;

pos. M53 - short butt plate;

pos. 44 - axis of the bolts of the junction of the vertical wall;

pos. 45 - bolts of the joints of the belts of the main beams.

Flange corners, combined with a vertical wall with rivets, are used for joining with the connecting beam without changes. Standard flat horizontal plates cannot be used for attachment to the connecting beam. Therefore, a constructive solution is proposed for fastening the belts of the beam of the span structure of the NZhM-56 to the connecting beam, shown in figure 6:

pos. 7 - connecting beam of the river part of the MML-VF-VT with a ramp and the span of the NZHM-56;

pos. 46 - butt pad long M52-1;

pos. 47 - L-shaped overlay of the upper belt of the beam of the span structure NZhM-56 left;

pos. 48 - L-shaped overlay of the top belt of the beam of the span structure NZhM-56 right;

pos. 49 - L-shaped overlay of the lower belt of the beam of the superstructure NZhM-56;

pos. 50 - section of the superstructure NZHM-56;

pos. 51 - beam spans NZhM-56;

pos. 52 - flange corner.

Combining the upper belt of the span beam (pos. 50) with the vertical (front) wall of the connecting beam (pos. 7) is carried out with the help of L-shaped linings (pos. 48). Covers are installed under the upper belt of the superstructure. The upper butt plate (pos. 46), which is joined to the l-shaped plate with bolts through the upper girder belt, is half cut across the standard butt plate.

The principal design solution for attaching the lower belts of the beams of the superstructure to the connecting beam is almost the same as that of the upper belts. The difference is that there are no restrictions due to the flange corners (pos. 52) on the configuration of the vertical sheets of the L-shaped lining adjacent to the connecting beam, and there is also no vertical wall of the span beam (pos. 51). This allows you to combine the lining of the lower belt into a single structure (pos. 49).

Combining railway passages MJL-VF-VT and NZhM-56 is carried out by a special connecting beam. The beam is hung on the bottom and deck longitudinal butt joints of middle pontoons with the rail of the PR brand. The top of the beam is about 1.10-1.20 m above the deck of the pontoons MLZH-VF-VT. The front side of the beam, facing the block of the superstructure, has holes for bolts that provide a rigid joining of the beam and the railway passage NZHM-56. On the opposite side of the connecting beam there are holes for bolts that unite the beam with a ramp (flange blocks of the main ramp beams). Inside the hull of the beam, stiffening ribs and yarns are installed connecting the walls facing the NZHM-56 and the ramp.

Due to the relatively low elevation of the ramp over the MJL-WF-VT deck, walkways (sidewalks) on the sides of the rail track are not made on the ramp. There is enough inter-rail pavement flooring and metal stairs on the sides of the ramp to rise from the MJL-VF-VT deck to the connecting beam and then to the NZhM-56 pavements. Therefore, the top of the connecting beam is made in two levels. The central part, which provides the support of the rails on the connecting beam, is at the level of the top of the main beam of the span structure NZHM-56. The sides of the beam (below the central part of approximately 0.30-0.40 m) are made in the level of the top sidewalks of the span structures NZHM-56.

For the convenience of working with fasteners inside the connecting beam, access to the inner wall surfaces is provided. Access is provided by a hatch device with an internal staircase. The hatch is located on the sidewalk aisle from the side opposite to the installation side of the drive for controlling the longitudinal bottom lock. The minimum working space inside the cavity of the connecting beam (cavity width) is about 1.00 m.

General types of connecting beams are given in figure 7:

pos. 7 - connecting beam of the river part of the MML-VF-VT with a ramp and the span of the NZHM-56;

pos. 53 - pin longitudinal bottom lock;

pos. 54 - an eye of the longitudinal deck butt device;

pos. 55 - an eye of the longitudinal bottom joint device;

pos. 56 - fork longitudinal bottom butt device;

pos. 57 - fencing of the longitudinal bottom lock;

pos. 58 - niche of the longitudinal bottom lock;

pos. 59 - drive control longitudinal bottom lock;

pos. 60 - slinging loop;

pos. 61 - the top plane of the butt beam (the location of the rail track);

pos. 62 - shelf to accommodate the passage (sidewalk);

pos. 63 - the location of the bolts fastening the flange corners of the block of the superstructure NZhM-56;

pos. 64 - the location of the mounting bolts L-shaped lining the upper belt of the beam span of the structure NZHM-56;

pos. 65 - the location of the bolts attaching the L-shaped lining of the lower belt of the beam of the span structure NZhM-56;

pos. 66 - the location of the bolts mounting beams ramp;

pos. 67 - the deck level of the pontoons of the MOLZH-VF-VT;

pos. 68 - cover (hatch) of access to the internal cavity of the beam;

pos. 69 - the longitudinal axis of the bridge.

. Несущими конструкциями пандуса являются двутавровые балки индивидуального изготовления с переменной высотой. Балки объединяются между собой продольными и поперечными связями. Продольные оси балок находятся на расстоянии 1500-1600 мм друг от друга.The ramp is a trestle-type construction with an inclined upper plane (railway carriageway), consisting of three sections along the length (according to the number of river links on which it rests). The total length of the ramp sections (in order of the connecting beam): first - about 12.70 m; the second is about 13.90 m; the third - about 7.30 m. The design of the ramp provides a slope of 28-30

. The bearing structures of the ramp are custom-made I-beams with variable height. Beams are interconnected by longitudinal and transverse links. The longitudinal axis of the beams are at a distance of 1500-1600 mm from each other.

The lower belts of the ramp beams are installed along the axes of the rails of the pontoons of the PR brand. Between the pontoon rail and the lower belt, a special gasket (strip) of rigid polymeric material is laid and secured, protecting the structural elements from collapsing in places of concentration of efforts. Strip thickness - 12-15 mm. Polymer strip is not installed on the support plate of the BPR mounting beam. Rails are fastened to the upper belts of the main ramp beams. Sections of the ramp are presented in figure 8:

pos. к - side view (facade) of the ramp section №1;

pos. l - side view (facade) of section of ramp №2;

pos. m - side view (front) of section of ramp №3;

pos. 70 - main beam (I-beam of variable height);

pos. 71 - flange unit;

pos. 72 - strip of rigid polymeric material;

pos. 73 — installation section of the lower belt of the main beam on the base plate of the ramp fastening beam (without a strip of rigid polymeric material).

The ramp is bolted to the connecting beam through flange blocks mounted on a vertical wall and belts of the supporting beams. Also, bolts and with the help of similar flange blocks of the ramp section are fastened to each other. The flange block is a three-dimensional structure made of steel sheet, inserted at the end of the beam into a space bounded by a vertical sheet, upper and lower belts. The block is an integral part of the beam. The figure 9 shows the constructive solution of fastening the ramp section to the connecting beam on the bolts using flange blocks welded to the main beam:

pos. OL - middle pontoon with rail of PR brand;

pos. 7 - connecting beam of the river part of the MML-VF-VT with a ramp and the span of the NZHM-56;

pos. 67 - the deck level of the pontoons of the MOLZH-VF-VT;

pos. 72 - strip of rigid polymeric material;

pos. 74 - section of the main ramp girder;

pos. 75 - left flange block;

pos. 76 - right flange block;

pos. 77 - rail P-50;

pos. 78 - rail niche with rail.

Claims (1)

The method of docking of river parts of floating rail bridges of the bridge MZHZH-VF-VT and the hinged cantilever system of ferries on separate floating supports NZhM-56, characterized by the use of structural elements that ensure the joint operation of bridges of different systems when passing a mobile load on the butt section MLG-VF-VT for five river links with additional pontoons of brand P with installation of liners for longitudinal butt joint of the brand MT9 and on the butt section NZhM-56 of dual pontoons under the sections flying x buildings, as well as the mating of river parts of the bridges into a single floating system through a special connecting beam bolted to the section of the span of the NZhM-56 through the flange corners and L-shaped plates and by means of the longitudinal attachment of the pontoons MLZH-VF-VT and NZhM-56 each to a friend with the provision of connection and transfer of railway travel from a high level on the superstructure NZHM-56 to a lower level of the MLG-VF-VT deck by installing a PR-type ramp blocks on the pontoons, combined with a connecting beam and between each other The structure of the flange blocks, as well as with the river part of the MLG-VF-VT through special ramp mounting beams, which are shortened pontoons of the BPR, BP, and BK brands and embedded between the standard (inventory) pontoons of the bridge-tapes of the respective brands (PR, P, K) and also with the provision of the through pass of the wheeled and tracked vehicles from the NZHM-56 road passage to the deck of the MLH-VF-VT pontoons by installing a shortened section of the road passage between the bridges of the different system and installing a ramp on the deck of the MLZH-VF-VT railroad tunnel waistband and tracked vehicles to the level of road directions NZHM-56.

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