CN210482001U - Telescopic overlapped type steel truss bridge - Google Patents
Telescopic overlapped type steel truss bridge Download PDFInfo
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- CN210482001U CN210482001U CN201920334506.4U CN201920334506U CN210482001U CN 210482001 U CN210482001 U CN 210482001U CN 201920334506 U CN201920334506 U CN 201920334506U CN 210482001 U CN210482001 U CN 210482001U
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Abstract
The utility model relates to the technical field of bridge construction, in particular to a telescopic overlapped type steel truss bridge which mainly comprises a bridge abutment device, a truss device and a bridge deck device; the abutment device comprises a rear abutment and a front abutment, the rear abutment is positioned behind the front abutment, and hydraulic cylinders are arranged on the front surfaces of the front abutment and the rear abutment; the truss device comprises a plurality of groups of scissors structures consisting of two rocking bars, and the scissors structures are connected end to end by stud bolts through countersunk holes at two ends of the stud bolts to form a row of fence structures; the bridge deck device is fixed above the truss device and comprises five groups of bridge decks and a plurality of pulley devices; the telescopic overlapped steel truss bridge can realize free expansion of the bridge deck, when a flood season comes or a large-tonnage ship needs to navigate, the bridge structure can retract towards the abutment directions on two sides, sufficient under-bridge clearance is guaranteed, and the bridge has the advantages of simple and compact structure and small occupied space.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, concretely relates to flexible eclipsed form steel truss bridge.
Background
The bridge is a building constructed for a road to cross obstacles such as rivers and the like, and can help to realize smooth passing of vehicles. Although the bridge for fixing the bridge piers is stable in structure, the use requirement is difficult to meet in some special environments, for example, the accidents that the water level rapidly rises when the water level exceeds a warning line and then passes through the bridge deck or even breaks down the bridge are frequent in some areas in south China; in addition, when ships with large tonnage are sailing, higher requirements are generated on the clearance height under the bridge, obviously, the fixed bridge structure is difficult to adapt to the change of the use requirements caused by the change of the external environment, and relevant researches are carried out to meet the special requirements, but partial defects still exist.
The invention patent with application number 201611183640.6 designs a vertical rotation type opening bridge, which solves the problem that the bridge deck in a fixed bridge cannot move, but the structure still has some problems, such as when the bridge deck is pulled up by a steel cable, the center of gravity of the structure moves upwards, and the appearance of strong wind weather is often accompanied when the flood season comes, and the structure increases the potential safety hazard of the bridge.
The invention patent with the application number of 201610726952.0 designs a telescopic open bridge, provides a guide beam propelling mechanism as a bridge span support, improves the stability of the bridge in the opening and closing process, but the structure can not be applied to rivers with large span and has limited application range.
In order to meet the use requirements of bridges under various situations, it is necessary to develop a telescopic bridge with simple structure, high safety and good economical efficiency.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a flexible eclipsed form steel truss bridge, this truss bridge can realize freely flexible of bridge floor, and when the flood season came or had the large-tonnage ship to need to navigate, the bridge structures can contract back to both sides abutment direction, guarantees that sufficient under-bridge headroom, especially does not produce any to the space of river course central authorities top and shelters from. The design has the advantages of simple and compact structure and small occupied space.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a telescopic overlapped steel truss bridge, which is characterized in that the steel truss bridge mainly comprises a bridge abutment device, a truss device and a bridge deck device;
the abutment device comprises a rear abutment, an abutment sliding groove, an abutment bolt, an upper inclined strut, a lower inclined strut, a hydraulic cylinder and a front abutment; the rear abutment is positioned behind the front abutment; a hydraulic cylinder is arranged on the front surface of the abutment; two abutment sliding grooves are respectively fixed at two ends of the upper surface of the abutment, and an abutment bolt penetrates through the inside of each abutment sliding groove; the left end and the right end of the front surface of the abutment are fixedly provided with an upper inclined strut and a lower inclined strut and are connected with a truss device;
the truss device comprises a connecting rod, a rear baffle, a lower truss, a rocker, a stud bolt, an upper truss, a hinged nut, a front baffle and a rear stabilizing frame; the upper truss and the lower truss in the last row are respectively fixed on the upper support frame and the lower support frame; the rear surface of the rear baffle is fixed with a telescopic rod of a hydraulic cylinder, a plurality of round holes are formed in the vertical direction of the rear baffle, connecting rods penetrate through the round holes, and the hydraulic cylinder is arranged in the middle of the two connecting rods; the upper end and the lower end of the connecting rod are of boss structures, the upper boss sequentially penetrates through the middle holes of the two rockers and the upper truss and is screwed and fixed by the hinge nut, and the lower boss of the connecting rod sequentially penetrates through the middle holes of the two rockers and the lower truss and is screwed and fixed by the hinge nut; the hinge nut is matched with the external threads of the bosses at the two ends of the connecting rod in a screwing manner, a counter sink is arranged on the upper surface of the upper truss, and the hinge nut is seated in the counter sink; the left end and the right end of the upper truss are provided with boss structures; the two ends and the middle part of each rocker are respectively provided with a countersunk hole, the boss structures of the connecting rods are connected and fixed into a pair of scissors structures through the middle holes of the two rockers, and the scissors structures are connected end to end through the countersunk holes at the two ends by stud bolts to form a row of fence structures; a front baffle is fixed in the middle of the connecting rod in the foremost row, a stabilizing frame is fixedly installed on the front surface of the front baffle, and a steel truss bridge on the other side is provided with a stabilizing frame matched with the steel truss bridge;
the bridge deck device is fixed above the truss device and comprises a bridge deck plate A, a vertical groove A, a transverse groove A, a front slope A, a transverse groove B, a sliding block B, a rear slope B, a track B, a front slope B, a transverse groove C, a sliding block C, a rear slope C, a track C, a front slope C, a transverse groove D, a sliding block D, a rear slope D, a track D, a front slope D, a sliding block E, a rear slope E, a track E, a clamping block E, a front slope E, a trolley frame, a trolley, a bridge deck plate B, a bridge deck plate C, a bridge deck plate D and a bridge deck plate E; the abutment bolt penetrating through the abutment sliding groove simultaneously penetrates through the vertical groove A, and the vertical groove A is positioned at the rear ends of the left side wall and the right side wall of the bridge deck A; the transverse groove A is positioned at the lower part of the front ends of the left side wall and the right side wall of the bridge deck A; the upper surface of the bridge deck A is a flat surface, and five pulley devices are uniformly arranged on the lower surface in the left-right direction; the pulley device consists of a small wheel frame and small wheels, the small wheel frame fixes the small wheels and provides supporting force during sliding, the upper surface of the small wheel frame is attached to the lower surface of the bridge deck A, and the front end surface and the rear end surface of the pulley device are respectively superposed with the front end surface and the rear end surface of the bridge deck A;
when the bridge deck extends, the upper surface of the rear abutment, the upper surface of the bridge deck A, the upper surface of the bridge deck B, the upper surface of the bridge deck C, the upper surface of the bridge deck D and the upper surface of the bridge deck E are positioned on the same plane; the track B, the track C, the track D and the track E are respectively aligned, and five parallel tracks are uniformly arranged on B, C, D, E four bridge decks; a pulley device is arranged at the position where the lower surface of the bridge deck is flush with the rail, the front end face and the rear end face of the pulley device are respectively superposed with the front end face and the rear end face of the bridge deck, and small wheels on the pulley device slide on the upper truss; the five pulley devices below the bridge deck A are respectively aligned with the pulley devices below the bridge deck B; the rear slope surface B and the front slope surface A, the rear slope surface C and the front slope surface B, the rear slope surface D and the front slope surface C, and the rear slope surface E and the front slope surface C are slopes with complementary slopes, all rear slope surface angles are 30 degrees, and all front slope surface angles are 150 degrees; e, the front slope surface is an inclined surface and is in contact fit with the front slope surface at the other end; the side wall of the bridge deck E is positioned on the outer side of the side wall of the bridge deck D, the side wall of the bridge deck D is positioned on the outer side of the side wall of the bridge deck C, the side wall of the bridge deck C is positioned on the outer side of the side wall of the bridge deck B, and the side wall of the bridge deck B is positioned on the outer side of the side wall of the bridge deck A; the B sliding block is positioned at the lower position of the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck B, and the B sliding block slides in the A transverse groove; the sliding chute B is positioned at the position close to the front ends of the inner sides of the left and right side walls of the bridge deck B; the C sliding block is positioned at the position close to the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck C, and slides in the transverse groove B; the C sliding groove is positioned at the position, close to the lower part, of the front ends of the inner sides of the left side wall and the right side wall of the C bridge deck; the D sliding block is positioned at the position, close to the lower part, of the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck D, and slides in the C transverse groove; the D sliding groove is positioned at the position close to the front ends of the inner sides of the left and right side walls of the D bridge deck; the E sliding block is positioned at the position, close to the upper rear end, of the inner side of the left side wall and the right side wall of the bridge deck E, and slides in the transverse groove D; the clamping block is positioned at the lower position of the front ends of the outer sides of the left side wall and the right side wall of the bridge deck E.
Compared with the prior art, the utility model discloses beneficial effect lies in:
(1) the control system of the steel truss bridge adopts the hydraulic cylinder and the connecting rod device to replace the steel wire rope in the existing structure, ensures that the control system has simple and effective structure, avoids the problems of winding and blocking of the steel wire rope and the like, and ensures that the operation process is more stable.
(2) When large-tonnage ship need lead to the navigation, scalable bridge floor can contract to both sides abutment and retract, guarantees sufficient under-bridge headroom, avoids sheltering from the space production of river course central authorities top. When the flood season comes, the telescopic bridge deck is subjected to overlapped contraction, the gravity center of the whole structure cannot be improved, and the stability of the structure in the environment with large water flow impact and large wind is ensured.
(3) The roller structure replaces the moving friction in the existing design, so that the friction force and the structural energy consumption are reduced. Adopt multistage scalable eclipsed form bridge floor structure, confirm flexible distance according to actual demand, can effectively improve energy utilization.
(4) The design of the slope surface accords with the principle of mechanical transmission, reduces the loss of energy in the transmission process, ensures that the bridge deck is tightly connected without fracture, and avoids the vehicle from jumping in the driving process.
(5) The mutual sleeving structure of the front and the rear stabilizing frames can increase the stability of the bridge and improve the bending strength of the bridge deck
Drawings
Fig. 1 is a schematic view of an overall structure of an embodiment of a telescopic overlapped steel truss bridge according to the present invention in an extended state;
fig. 2 is a schematic view of the overall structure of an embodiment of the present invention in an extended state;
fig. 3 is a schematic view of the overall structure of an embodiment of the present invention in a contracted state;
fig. 4 is a schematic front view of the overall structure in a contracted state according to an embodiment of the present invention;
fig. 5 is a schematic view of a single-sided structure of an embodiment of the steel truss bridge in a contracted state according to the present invention;
fig. 6 is a schematic view of an overall structure of an abutment device according to an embodiment of the present invention;
fig. 7 is a schematic front view of the overall structure of an embodiment of the bridge abutment device of the steel truss bridge of the present invention;
fig. 8 is a schematic front view of a truss apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic view of the overall structure of a deck A of an embodiment of the present invention;
FIG. 10 is a schematic view of the overall structure of a deck B according to an embodiment of the present invention;
fig. 11 is a schematic view of an overall structure of a C-deck according to an embodiment of the present invention;
FIG. 12 is a schematic view of the overall structure of a bridge deck D according to an embodiment of the present invention;
fig. 13 is a schematic view of an overall structure of a deck E according to an embodiment of the present invention;
fig. 14 is a partially enlarged schematic view of a pulley device according to an embodiment of the present invention;
in the figure: 100. abutment means 101, rear abutment, 102, abutment runner 103, abutment bolts 104, upper angle brackets 105, lower angle brackets 106, hydraulic cylinders 107, front abutment 200, truss means 201, connecting rods 202, back fenders 203, lower trusses 204, rockers 205, studs 206, upper trusses 207, hinge nuts 208, front fenders 209, rear stabilizers 300, deck means 301, A deck means 302, A vertical channels 303, A transverse channels 304, A front ramps 305, B transverse channels 306, B sliders 307, B rear ramps 308, B tracks 309, B front ramps 310, C transverse channels 311, C sliders 312, C rear ramps 313, C tracks 314, C front ramps 315, D transverse channels 316, D sliders 317, D rear ramps 318, D tracks 320, 319, D front ramps 321, E sliders 321, E rear ramps, 322. e-track, 323, grip block, 324, E-ramp, 325, wheelbase, 326, wheellet, 327, B-deck, 328, C-deck, 329, D-deck, 330, E-deck.
Detailed Description
Specific embodiments of the present invention are given below. The specific embodiments are only used for further elaboration of the invention, and do not limit the scope of protection of the claims of the present application.
The utility model relates to a flexible overlapping type steel truss bridge (refer to fig. 1-14, steel truss bridge for short) comprises a bridge abutment device 100, a truss device 200 and a bridge deck device 300; the abutment device 100 is fixed on the foundation base, the truss device 200 is fixed at the front end of the abutment device 100, and the bridge deck device 300 is fixed above the truss device 200;
the abutment device 100 comprises a rear abutment 101, an abutment sliding groove 102, an abutment bolt 103, an upper inclined strut 104, a lower inclined strut 105, a hydraulic cylinder 106 and a front abutment 107; the rear abutment 101 is located behind the front abutment 107; four hydraulic cylinders 106 are installed on the front surface of the rear abutment 101; two abutment sliding grooves 102 are respectively fixed at two ends of the upper surface of the abutment 101, and an abutment bolt 103 penetrates through the abutment sliding grooves 102; an upper inclined strut 104 and a lower inclined strut 105 are fixed at the left end and the right end of the front surface of the abutment 101, and the upper inclined strut 104 is positioned at the upper part of the lower inclined strut 105;
the upper surfaces of the upper inclined strut 104 and the lower inclined strut 105 are simultaneously connected with a truss device 200, and the truss device 200 comprises a connecting rod 201, a rear baffle 202, a lower truss 203, a rocker 204, a stud 205, an upper truss 206, a hinged nut 207, a front baffle 208 and a rear stabilizing frame 209; the upper truss 206 and the lower truss 203 in the last row are fixed on the upper support frame 104 and the lower support frame 105 respectively; the rear surface of the rear baffle 202 is fixed with a telescopic rod of a hydraulic cylinder 106, a plurality of round holes are formed in the vertical direction of the rear baffle 202, the connecting rods 201 penetrate through the round holes, and the hydraulic cylinder is arranged in the middle of the two connecting rods 201; the upper end and the lower end of the connecting rod 201 are of boss structures, the upper boss sequentially penetrates through the middle holes of the two rockers 204 and the upper truss 206 and is screwed and fixed by the hinge nut 207, and the lower boss of the connecting rod 201 sequentially penetrates through the middle holes of the two rockers 204 and the lower truss 203 and is screwed and fixed by the hinge nut 207; the hinge nut 207 is matched with the external threads of the bosses at the two ends of the connecting rod 201 in a screwing mode, a counter bore is formed in the upper surface of the upper truss 206, and the hinge nut 207 is seated in the counter bore to ensure that the hinge nut and the bridge deck device are not in friction interference; boss structures are arranged at the left end and the right end of the upper truss 206, and have the function of limiting the bridge deck device 300 to move left and right;
the two ends and the middle part of each rocker 204 are respectively provided with a countersunk hole, the boss structures of the connecting rods 201 are connected and fixed into a group of scissors structures through the middle holes of the two rockers 204, and the multiple groups of scissors structures are connected end to end through the countersunk holes at the two ends by the stud bolts 205 to form a row of fence structures;
a front baffle plate 208 is fixed in the middle of the foremost row of connecting rods 201, a stabilizing frame 209 is fixedly installed on the front surface of the front baffle plate 208, a steel truss bridge on the other side is provided with a stabilizing frame matched with the steel truss bridge, and when bridge decks on two sides are contacted, the two stabilizing frames are mutually sleeved and matched, so that the stability of the bridge is improved, and the bending strength of the bridge deck is improved;
the bridge deck device 300 is fixed above the truss device 200, and the bridge deck device 300 comprises an A bridge deck 301, an A vertical groove 302, an A transverse groove 303, an A front slope 304, a B transverse groove 305, a B slider 306, a B rear slope 307, a B track 308, a B front slope 309, a C transverse groove 310, a C slider 311, a C rear slope 312, a C track 313, a C front slope 314, a D transverse groove 315, a D slider 316, a D rear slope 317, a D track 318, a D front slope 319, an E slider 320, an E rear slope 321, an E track 322, a clamping block 323, an E front slope 324, a small wheel frame 325, a small wheel 326, a B bridge deck 327, a C bridge deck 328, a D bridge deck 329 and an E bridge deck 330; the abutment bolt 103 penetrating through the abutment sliding groove 102 simultaneously penetrates through an A vertical groove 302, and the A vertical groove 302 is positioned at the rear ends of the left side wall and the right side wall of an A bridge deck 301; the A transverse groove 303 is positioned at the lower position of the front ends of the left side wall and the right side wall of the A bridge deck 301; the upper surface of the bridge deck A is a flat surface, and five pulley devices are uniformly arranged on the lower surface in the left-right direction; the pulley device consists of a small wheel frame 325 and small wheels 326, the small wheel frame 325 fixes the small wheels 326 and provides supporting force during sliding, the upper surface of the small wheel frame 325 is attached to the lower surface of the bridge deck A301, and the front end surface and the rear end surface of the pulley device are respectively superposed with the front end surface and the rear end surface of the bridge deck A301;
the upper surfaces of the rear abutment 101, the A-deck 301, the B-deck 327, the C-deck 328, the D-deck 329, and the E-deck 330 are in the same plane when the deck is extended; the B track 308, the C track 313, the D track 318 and the E track 322 are respectively aligned, and five parallel tracks are uniformly arranged on B, C, D, E four bridge decks; a pulley device is arranged at the position where the lower surface of the bridge deck is flush with the rail, the front end face and the rear end face of the pulley device are respectively superposed with the front end face and the rear end face of the bridge deck, and a small wheel 326 on the pulley device slides on the upper truss 206; the five pulley devices below the bridge deck A301 are respectively aligned with the pulley devices below the bridge deck B;
the rear slope surface 307 and the front slope surface 304 of the A, the rear slope surface 312 and the front slope surface 309 of the B, the rear slope surface 317 and the front slope surface 314 of the C, and the rear slope surface 321 and the front slope surface 319 of the E are slope-complementary slopes, all rear slope surface angles are 30 degrees, all front slope surface angles are 150 degrees, and therefore the front slope surface and the rear slope surface can be attached to each other; the E front slope 324 is an inclined plane and is in contact fit with the front slope at the other end, so that the bridge deck is tightly connected without fracture, and the vehicle is prevented from jumping in the driving process;
the side wall of the E bridge deck 330 is positioned outside the side wall of the D bridge deck 329, the side wall of the D bridge deck 329 is positioned outside the side wall of the C bridge deck 328, the side wall of the C bridge deck 328 is positioned outside the side wall of the B bridge deck 327, and the side wall of the B bridge deck 327 is positioned outside the side wall of the A bridge deck 301;
the B sliding block 306 is positioned at the lower position of the rear ends of the inner sides of the left and right side walls of the bridge deck B, and the B sliding block 306 slides in the A transverse groove 303; the B chute 305 is positioned at the upper position of the front ends of the inner sides of the left and right side walls of the bridge deck B; the C slide block 311 is positioned at the position close to the rear ends of the inner sides of the left and right side walls of the C bridge deck, and the C slide block 311 slides in the B transverse groove 305; the C chute 310 is positioned at the lower position of the front ends of the inner sides of the left and right side walls of the C bridge deck; the D sliding block 316 is positioned at the lower position of the rear ends of the inner sides of the left and right side walls of the D bridge deck, and the D sliding block 316 slides in the C transverse groove 310; the D sliding groove 315 is positioned at the upper position of the front ends of the inner sides of the left and right side walls of the D bridge deck; the E slider 320 is positioned at the position close to the rear ends of the inner sides of the left and right side walls of the E bridge deck, and the E slider 320 slides in the D transverse groove 315; the clamping block 323 is positioned at the lower position of the front ends of the outer sides of the left and right side walls of the E-bridge deck, and the clamping block 323 clamps the boss structure of the foremost upper truss 206.
The utility model is further technically characterized in that the design is a front and back bilateral symmetry structure.
The number of the shear structures is 24, the number of the fence structures is 5, the number of the hydraulic cylinders arranged in the middle positions of the two fence structures is 4, the combination number of the shear structures in the length direction can be adjusted for rivers with larger spans, the number of the trusses and the number of the stabilizing frames matched with the shear structures are increased and decreased, the overall length of the steel truss bridge is changed, the combination number of the fence structures can be increased in the width direction under the condition that the traffic volume of vehicles is larger, and the width of the trusses, the number of the stabilizing frames and the width of the bridge deck plate are increased, so that the overall width of the steel truss bridge is adjusted.
The utility model discloses flexible eclipsed form steel truss bridge's working process is: the rear abutment 101 and the front abutment 107 are respectively fixed on foundation bases on two banks of a river, bridge decks at two ends are contacted when a vehicle normally passes through, 10 bridge decks are sequentially connected to form a plane for the vehicle to run, when a large-tonnage ship passes through, the steel truss bridge needs to be contracted, and because the design is a front-back symmetrical structure, the rear side part is taken as an example for explanation.
When the telescopic rod of the hydraulic cylinder 106 starts to contract, the telescopic rod drives the rear baffle 202 to move backwards, the upper inclined strut 104 and the lower inclined strut 105 not only support the last row of upper trusses 206 and the last row of lower trusses 203, but also fix the last row of upper trusses 206 and the last row of lower trusses 203, the relative positions of the last row of upper trusses 206 and the last row of lower trusses 203 and the rear abutment 101 are kept unchanged, meanwhile, the last row of connecting rods 201 are kept fixed, when the rear baffle 202 drives the last second row of connecting rods 201 to move backwards, the last row of trusses and the last but one row of trusses are close to each other, all rockers 204 can move in a linkage mode due to the fact that the truss device 200 is of a parallelogram fence structure, and the effect that the front row of rocker 204 can; because the boss structure of the foremost row upper truss 206 is fixed on the clamping block 323, the foremost row upper truss 206 pulls the E-bridge deck 330 to move backwards, the pulley device below the E-bridge deck 330 slides on the upper truss 206, and the friction force of the E-bridge deck in the moving process of the upper truss 206 is reduced; the E rear slope 321 is located below the D front slope 319, under the action of backward pulling force and the matching of the two slopes, the E bridge deck 330 is inserted below the D bridge deck 329, the E slider 320 slides in the D transverse groove 315 to ensure the stability of the motion track, and the pulley device below the D bridge deck 329 moves in the E track 322 to reduce the friction force when the E bridge deck 330 moves below the D bridge deck 329.
When the E slider 320 moves to the rearmost end of the D transverse slot 315, the D bridge plate 329 is completely lifted by the E bridge plate 330, and the D transverse slot 315 is pulled by the E slider 320 to move backwards continuously; the D rear slope 317 of the D bridge deck 329 is obliquely inserted below the C front slope 314, when the D bridge deck 329 moves backwards, the C bridge deck 328 is lifted upwards, and when the C bridge deck 328 is completely lifted, the D slide block 316 pulls the C transverse groove 310 to move backwards continuously; the C rear slope 312 of the C bridge panel 328 is obliquely inserted below the B front slope 309, when the C bridge panel 328 moves backwards, the B bridge panel 327 is lifted upwards, and when the B bridge panel 327 is completely lifted, the C slide block 311 pulls the B transverse groove 305 to continue moving backwards; the B rear slope surface 307 of the B bridge deck 327 is obliquely inserted below the A front slope surface 304, the A bridge deck 301 can be upwards supported when the B bridge deck 327 moves backwards, the A bridge deck 301 cannot move back and forth and can only move up and down in a limited space due to the limiting effect of the abutment bolts 103 on the A vertical grooves 302, and when the A bridge deck 301 is completely supported, five bridge deck plates are mutually overlapped to reach a contraction state, so that the contraction work of the steel truss bridge is completed.
When a vehicle needs to pass on the bridge floor, the telescopic rods of the hydraulic cylinders 106 are ejected, the distance between the trusses is lengthened, the boss structure of the upper truss 206 at the foremost end pushes the clamping block 323 to move forwards, the E bridge deck 330 is pulled out from the D bridge deck 329, and when the E slider 320 contacts the front end face of the D transverse groove 315, the E bridge deck 330 pulls the D bridge deck 329 to move forwards; the D bridge plate 329 is drawn out from the lower part of the C bridge plate 328, and when the D slide block 316 contacts the front end face of the C transverse groove 310, the D bridge plate 329 pulls the C bridge plate 328 to move forwards; the C bridge plate 328 is drawn out from the B bridge plate 327, and when the C slide block 311 contacts the front end face of the B transverse groove 305, the C bridge plate 328 pulls the B bridge plate 327 to move forwards; the B bridge deck 327 is drawn out from the A bridge deck 301, when the B sliding block 306 contacts the front end face of the A transverse groove 303, the upper surfaces of the five bridge deck boards are in the same plane, the steel truss bridge is in a fully extended state, the rear stabilizing frame 209 on the rear side and the stabilizing frame on the front side are mutually sleeved and matched, the stability of the bridge is improved, the bending strength of the bridge deck is improved, in the forward moving process of each bridge deck board, the pulley devices are located among the bridge deck boards, sliding friction is avoided, energy loss is reduced, and therefore the extending work of the steel truss bridge is completed.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (3)
1. A telescopic overlapped type steel truss bridge is characterized by mainly comprising a bridge abutment device, a truss device and a bridge deck device; the abutment device comprises a rear abutment, an abutment sliding groove, an abutment bolt, an upper inclined strut, a lower inclined strut, a hydraulic cylinder and a front abutment; the rear abutment is positioned behind the front abutment; a hydraulic cylinder is arranged on the front surface of the abutment; two abutment sliding grooves are respectively fixed at two ends of the upper surface of the abutment, and an abutment bolt penetrates through the inside of each abutment sliding groove; the left end and the right end of the front surface of the abutment are fixedly provided with an upper inclined strut and a lower inclined strut and are connected with a truss device; the truss device comprises a connecting rod, a rear baffle, a lower truss, a rocker, a stud bolt, an upper truss, a hinged nut, a front baffle and a rear stabilizing frame; the upper truss and the lower truss in the last row are respectively fixed on the upper support frame and the lower support frame; the rear surface of the rear baffle is fixed with a telescopic rod of a hydraulic cylinder, a plurality of round holes are formed in the vertical direction of the rear baffle, connecting rods penetrate through the round holes, and the hydraulic cylinder is arranged in the middle of the two connecting rods; the upper end and the lower end of the connecting rod are of boss structures, the upper boss sequentially penetrates through the middle holes of the two rockers and the upper truss and is screwed and fixed by the hinge nut, and the lower boss of the connecting rod sequentially penetrates through the middle holes of the two rockers and the lower truss and is screwed and fixed by the hinge nut; the hinge nut is matched with the external threads of the bosses at the two ends of the connecting rod in a screwing manner, a counter sink is arranged on the upper surface of the upper truss, and the hinge nut is seated in the counter sink; the left end and the right end of the upper truss are provided with boss structures; the two ends and the middle part of each rocker are respectively provided with a countersunk hole, the boss structures of the connecting rods are connected and fixed into a pair of scissors structures through the middle holes of the two rockers, and the scissors structures are connected end to end through the countersunk holes at the two ends by stud bolts to form a row of fence structures; a front baffle is fixed in the middle of the connecting rod in the foremost row, a stabilizing frame is fixedly installed on the front surface of the front baffle, and a steel truss bridge on the other side is provided with a stabilizing frame matched with the steel truss bridge; the bridge deck device is fixed above the truss device and comprises a bridge deck plate A, a vertical groove A, a transverse groove A, a front slope A, a transverse groove B, a sliding block B, a rear slope B, a track B, a front slope B, a transverse groove C, a sliding block C, a rear slope C, a track C, a front slope C, a transverse groove D, a sliding block D, a rear slope D, a track D, a front slope D, a sliding block E, a rear slope E, a track E, a clamping block E, a front slope E, a trolley frame, a trolley, a bridge deck plate B, a bridge deck plate C, a bridge deck plate D and a bridge deck plate E; the abutment bolt penetrating through the abutment sliding groove simultaneously penetrates through the vertical groove A, and the vertical groove A is positioned at the rear ends of the left side wall and the right side wall of the bridge deck A; the transverse groove A is positioned at the lower part of the front ends of the left side wall and the right side wall of the bridge deck A; the upper surface of the bridge deck A is a flat surface, and five pulley devices are uniformly arranged on the lower surface in the left-right direction; the pulley device consists of a small wheel frame and small wheels, the upper surface of the small wheel frame is attached to the lower surface of the bridge deck A, and the front end face and the rear end face of the pulley device are respectively superposed with the front end face and the rear end face of the bridge deck A; when the bridge deck extends, the upper surface of the rear abutment, the upper surface of the bridge deck A, the upper surface of the bridge deck B, the upper surface of the bridge deck C, the upper surface of the bridge deck D and the upper surface of the bridge deck E are positioned on the same plane; the track B, the track C, the track D and the track E are respectively aligned, and five parallel tracks are uniformly arranged on B, C, D, E four bridge decks; a pulley device is arranged at the position where the lower surface of the bridge deck is flush with the rail, the front end face and the rear end face of the pulley device are respectively superposed with the front end face and the rear end face of the bridge deck, and small wheels on the pulley device slide on the upper truss; the five pulley devices below the bridge deck A are respectively aligned with the pulley devices below the bridge deck B; the rear slope surface B and the front slope surface A, the rear slope surface C and the front slope surface B, the rear slope surface D and the front slope surface C, and the rear slope surface E and the front slope surface C are slopes with complementary slopes, all rear slope surface angles are 30 degrees, and all front slope surface angles are 150 degrees; e, the front slope surface is an inclined surface and is in contact fit with the front slope surface at the other end; the side wall of the bridge deck E is positioned on the outer side of the side wall of the bridge deck D, the side wall of the bridge deck D is positioned on the outer side of the side wall of the bridge deck C, the side wall of the bridge deck C is positioned on the outer side of the side wall of the bridge deck B, and the side wall of the bridge deck B is positioned on the outer side of the side wall of the bridge deck A; the B sliding block is positioned at the lower position of the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck B, and the B sliding block slides in the A transverse groove; the sliding chute B is positioned at the position close to the front ends of the inner sides of the left and right side walls of the bridge deck B; the C sliding block is positioned at the position close to the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck C, and slides in the transverse groove B; the C sliding groove is positioned at the position, close to the lower part, of the front ends of the inner sides of the left side wall and the right side wall of the C bridge deck; the D sliding block is positioned at the position, close to the lower part, of the rear ends of the inner sides of the left side wall and the right side wall of the bridge deck D, and slides in the C transverse groove; the D sliding groove is positioned at the position close to the front ends of the inner sides of the left and right side walls of the D bridge deck; the E sliding block is positioned at the position, close to the upper rear end, of the inner side of the left side wall and the right side wall of the bridge deck E, and slides in the transverse groove D; the clamping block is positioned at the lower position of the front ends of the outer sides of the left side wall and the right side wall of the bridge deck E.
2. The telescopic overlapped steel truss bridge as claimed in claim 1, wherein the rear abutment and the front abutment are respectively fixed to foundation bases on both banks of the river.
3. The telescopic overlapping type steel truss bridge as claimed in claim 1, wherein the number of the scissors structures is 24, the number of the fence structures is 5, and the number of the hydraulic cylinders disposed at the middle position of two adjacent fence structures is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920334506.4U CN210482001U (en) | 2019-03-08 | 2019-03-08 | Telescopic overlapped type steel truss bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920334506.4U CN210482001U (en) | 2019-03-08 | 2019-03-08 | Telescopic overlapped type steel truss bridge |
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| Publication Number | Publication Date |
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| CN210482001U true CN210482001U (en) | 2020-05-08 |
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| CN201920334506.4U Expired - Fee Related CN210482001U (en) | 2019-03-08 | 2019-03-08 | Telescopic overlapped type steel truss bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411525A (en) * | 2021-12-31 | 2022-04-29 | 湖南五新模板有限公司 | Large-span inverted arch construction stepping hydraulic trestle |
-
2019
- 2019-03-08 CN CN201920334506.4U patent/CN210482001U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411525A (en) * | 2021-12-31 | 2022-04-29 | 湖南五新模板有限公司 | Large-span inverted arch construction stepping hydraulic trestle |
| CN114411525B (en) * | 2021-12-31 | 2024-04-30 | 湖南五新模板有限公司 | Large-span inverted arch construction stepping hydraulic trestle |
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