CN219157437U - Railway bridge old-moving and new-changing section-by-section transverse traction device - Google Patents

Abstract

The utility model discloses a railway bridge old-moving and new-changing section-by-section transverse traction device, which comprises a plurality of sliding rails; the first slide block of the old beam Duan Jingdi of the old beam body is in sliding fit with the corresponding slide rail, and the second slide block of the new beam Duan Jingdi of the new beam body is in sliding fit with the corresponding slide rail; the second sliding block is higher than the first sliding block; each node of the old beam body and the new beam body is provided with a first traction system and a second traction system; the front end of a first traction rope of the first traction system clamps a front opening of a first anchor hole of a front steel frame; the middle section of the first traction rope is stretched by a lower tension wheel and is connected with a first traction jack; the front end of a second traction rope of the second traction system clamps the front opening of a second anchor hole of the front leveling truss, the middle section of the second traction rope is sequentially tensioned through a rear tensioning wheel, then is reversed through an upper reversing wheel and a lower reversing wheel, and is tensioned through the upper tensioning wheel and connected with a second traction jack. The device can be used for pulling and dragging the new beam section and the old beam section.

Description

Railway bridge old-moving and new-changing section-by-section transverse traction device

Technical Field

The utility model relates to the technical field of beam shifting and beam changing construction of an overhead railway bridge, in particular to a section-by-section transverse traction device for old and new shifting of an overhead railway bridge.

Background

Along with the rapid development of urban railways for promoting local economy and facilitating the travel of people, stations are often required to be additionally arranged in the existing overhead railway compound line section, and the railway is changed from 2 lines to 4 lines; the old beam body, namely the original simply supported reinforced concrete T beam for supporting the double-line railway, is transversely moved out of the center line position of the existing railway line, the new beam body, namely the prefabricated continuous steel box beam for enabling the railway to be changed from 2 lines to 4 lines is transversely moved to the center line position of the existing railway line, and the old and new moving process must be completed as soon as possible so as to meet the hard requirement of restoring operation and traffic of the railway line within 10 hours.

Because the high-voltage contact network cable exists above the railway line, the process of moving old and changing new can not be carried by adopting a large crane to quickly lift and carry, but only adopts a more complicated transverse traction mode, and the specific operation process is as follows.

Firstly, performing front construction, namely piling on the ground, pouring a concrete bearing platform on the pile top, and then constructing a plurality of upright posts on the bearing platform, wherein each four upright posts which are rectangular and distributed in four corners are a group, and diagonal bracing and transverse connecting beams for reinforcement are arranged between each group of upright posts; then, placing and fixing longitudinal girders on the top ends of the upright posts, and placing and fixing transverse girders on the longitudinal girders, wherein the longitudinal direction refers to the length direction of a railway and the transverse direction refers to the width direction of the railway, and the pile foundations, the bearing platforms, the upright posts, the longitudinal girders and the transverse girders jointly form a sliding bracket for moving and replacing girders; then, constructing and fixing foundation plates parallel to the transverse girders of the sliding support on the transverse girders, and fixing sliding rails on the foundation plates; then, arranging a jacking jack on the bridge pier of the old beam body, namely the simply supported reinforced concrete T beam, arranging a first sliding block in a sliding rail of the old beam Duan Xiafang in a sliding manner, and then lowering the jacking jack to fix the old beam Duan Gezhi on the first sliding block; then, setting up new beam bodies, namely each new beam section of the turnout continuous steel box beam, at the top end of the sliding support at one side of the railway, sliding and arranging a second sliding block in each sliding rail, and placing and fixing a new beam Duan Deduan on the second sliding block; to this end, each new beam section of the new beam body and each old beam Duan Jun of the old beam body are slid into place on the transverse slide rails and the pre-preparation is completed.

And then, carrying out a core process of beam moving and beam changing, wherein the thought that an old beam body is pulled and a new beam body is pushed is adopted because the beam cannot be lifted. Specifically, a traction type jack is fixed at one side of a railway, and is connected with one old beam section of an old beam body by utilizing a traction rope, and the old beam section is transversely moved outwards from the central line of the railway line by driving the traction type jack to drag the traction rope; meanwhile, a pushing jack is fixed on the other side of the railway, a new beam section of a new beam body is pushed inwards by the jack, but because the stroke of the jack is far smaller than the distance between the initial position of the new beam body and the central line of the railway line, a mode of continuously and repeatedly superposing an auxiliary cushion block in front of a piston rod of the jack can only be adopted, namely, each time the jack is pushed to the upper limit of the stroke, the piston rod is retracted, an auxiliary cushion block is additionally arranged in front of the piston rod, the jack is driven to push the auxiliary cushion block again, after the jack is pushed to the upper limit of the stroke, the auxiliary cushion block is additionally arranged again, the jack is pushed to the upper limit of the stroke … … again, and the jack reciprocates in this way until the new beam section is pushed to the central line position of the railway line.

In the construction process of beam moving and beam changing, the traction type jack can continuously drag the operation, so the speed is high and the work efficiency is high, but the pushing type jack needs to continuously overlap auxiliary cushion blocks and cannot continuously operate, so the speed is low and the efficiency is low, and the progress and the efficiency of the whole beam moving and beam changing process are slow. It has also been proposed to use a continuous traction and dragging method for both the new and the old beams, but the actual operation finds that the system of the new beam is difficult, because the system of the new beam needs to go over the system of the old beam, the overlapping layout of the new and the old traction ropes is difficult, mutual interference is easy to occur, and the distance that the new and the old beams need to be transversely moved is large, so that the lengths of the new and the old traction ropes are longer, and sagging and stirring are easier to occur, and mutual winding is easy.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a railway bridge old-moving and new-changing section-by-section transverse traction device which can adopt a traction and dragging mode for both a new beam section and an old beam section and can avoid the mutual entanglement interference of traction rope systems of the new beam section and the old beam section.

The technical scheme of the utility model is that the utility model provides a railway bridge old-shifting and new-changing section-by-section transverse traction device which comprises a plurality of transversely extending foundation plates, wherein a sliding rail is fixed on each foundation plate; each old beam Duan Jingdi-sliding block of the old beam body is in sliding fit on a corresponding sliding rail, and each new beam Duan Jingdi-sliding block of the new beam body is in sliding fit on a corresponding sliding rail; a first reaction frame is fixed on the foundation plate at the rear end of the sliding rail, a first traction jack is arranged on the first reaction frame, and the second sliding block is higher than the first sliding block; each node of the old beam body and the new beam body is provided with a first traction system and a second traction system; the first traction system comprises a first traction rope, a front steel frame and a rear steel frame which are fixed on the old beam Duan Liangce; the lower part of the rear section steel frame is provided with a lower tensioning wheel; the front end of the first traction rope passes through a first anchor hole at the lower part of the front steel frame, and the front end of the first traction rope is clamped at the front opening of the first anchor hole through a first anchor head; the middle section of the first traction rope is stretched by a lower tension wheel and is connected with a first traction jack; the second traction system comprises a second reaction frame fixed on a foundation plate at the rear end of the sliding rail, a second traction jack fixed on the second reaction frame, a second traction rope, an upper tensioning wheel arranged at the upper part of a rear steel frame, an upper reversing wheel and a lower reversing wheel arranged at the upper part of a front steel frame, a front leveling truss and a rear leveling truss fixed on a new beam Duan Liangce, wherein the rear leveling truss is provided with a rear tensioning wheel; the front end of the second traction rope penetrates through a second anchor hole of the front leveling truss, the front end of the second traction rope clamps a front opening of the second anchor hole through a second anchor head, and the middle section of the second traction rope is sequentially stretched through a rear tensioning wheel, then is reversed through an upper reversing wheel and a lower reversing wheel, and is stretched through an upper tensioning wheel and connected with a second traction jack.

Compared with the prior art, the railway bridge old-shifting and new-changing section-by-section transverse traction device has the following advantages.

Firstly, aiming at the problem that the traction ropes are long and drop easily, a first traction rope with a relatively short tightening length of a lower tensioning wheel is provided, and a second traction rope with a longer tightening length of a rear tensioning wheel, two reversing wheels and an upper tensioning wheel are provided, so that the two traction ropes are always kept in tension and do not drop, and the winding and stirring probability of the two traction ropes is reduced; moreover, the first sliding block and the second sliding block are designed to be obvious in height and fall, so that the height difference between the two traction ropes in the overlapped area is obviously increased, and the probability of mutual interference stirring of the two traction ropes overlapped in the old beam area is further reduced; the upper reversing wheel and the lower reversing wheel can tension the traction rope, successfully reduce the transverse height of the second traction rope and ensure that the traction rope led out from a higher new beam smoothly passes through an old beam body with a lower position; in conclusion, the device solves the problem of how to wire two traction systems of the same node, and successfully realizes synchronous traction of a new beam section and an old beam section which are flush with each other; and ensure smooth and stable traction process; because the new and old beams Duan Jun adopt continuous traction operation, intermittent operation of continuously overlapping cushion blocks when the new beams are pushed is replaced, so that the work efficiency is obviously improved, the working hours are shortened, and the rigid requirement of recovering the operation of the railway line within 10 hours is powerfully ensured.

When a new beam section is built outside a railway, a bracket and the like for building the outer contour of the new beam are required to be built, so that enough operation building space is required to be reserved, and enough safety distance such as 30 meters is required to be reserved between the new beam and the railway, so that the initial position of the new beam is far away from the railway, the distance required to be drawn by the new beam is large, the distance required to be drawn by the old beam is only about 10 meters outside the range of the railway, and the old beam can be detached to be lifted after the safety distance is met, so that the distance required to be drawn by the old beam is small. The traction ropes of the two sets of traction systems are staggered by a sufficient distance, do not interfere with each other and do not affect each other, so that the first traction system can be completely shut down while the second traction system continues to normally run, and the requirements of different traction distances required by the new beam and the old beam are met.

Preferably, a first counterweight is fixed at the end of the top surface of the new beam section; the end of the old beam Duan Dingmian is fixed with a slideway extending along the width direction of the railway, the slideway is slidably matched with a second counterweight through a third sliding block, the old beam Duan Dingmian is fixed with a pushing jack through a third reaction frame, and a piston of the pushing jack is connected with the second counterweight.

The idea of such design is as follows. The new beam section is only acted by a set of traction system, and the stress condition is single, so that the fixed first counterweight is arranged. The old beam Duan Youyu is simultaneously attached with two sets of traction systems, the stress condition is complex, namely, when the second traction rope is tensioned by the upper reversing wheel and the lower reversing wheel, the reaction force of the second traction rope to the two tensioning wheels can generate torque, the first anchor head of the first traction rope pulls the front steel frame to generate torque, and the two torques are overlapped to enable the old beam section to generate an overall trend of forward rollover; therefore, when the two traction ropes drag synchronously, the second counterweight is positioned at the rear limit position of the slideway, so that a larger counterweight torque is formed to resist the integral trend of forward rollover; when the old beam section is pulled in place and the first traction type jack stops, the torque of the first traction rope disappears, the overall forward rollover trend becomes weak, so that the pushing type jack is driven to push the second counterweight forwards, the force arm is shortened, the counterweight torque is reduced, and the torque balance of the traction state of the single traction rope is restored.

As a further preference, the hydraulic station of the jack is mounted on the second counterweight; therefore, in order to move the second counterweight, the hydraulic station of the pushing jack also has a certain dead weight, so that the hydraulic station is integrated on the second counterweight, the weight of the moving counterweight is further increased, the effective utilization is realized, and the torque balance adjusting effect is optimized.

Drawings

Fig. 1 is a schematic view of a traction device of the present utility model in a downward direction.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Fig. 3 is an enlarged schematic view of the portion B in fig. 1.

Fig. 4 is an enlarged schematic view of the portion C in fig. 1.

Fig. 5 is an enlarged schematic view of the portion D in fig. 1.

Fig. 6 is an enlarged schematic view of the portion E in fig. 1.

Fig. 7 is a schematic view of the structure of fig. 1 after being deflected by a certain angle.

Fig. 8 is an enlarged schematic view of the portion F in fig. 7.

Fig. 9 is an enlarged schematic view of the portion G in fig. 7.

Fig. 10 is an enlarged schematic view of the portion H in fig. 7.

The drawing shows that 1, a foundation plate, 2, a sliding rail, 3, an old beam section, 4, a first sliding block, 5, a new beam section, 6, a second sliding block, 7, a first counter-force frame, 8, a first traction type jack, 9, a first traction rope, 10, a front steel frame, 11, a rear steel frame, 12, a lower tension pulley, 13, a first anchor head, 14, a bottom steel truss, 15, a vertical fence, 16, a tripod, 17, a steel diagonal bracing, 18, a second counter-force frame, 19, a second traction type jack, 20, a second traction rope, 21, an upper tension pulley, 22, an upper reversing pulley, 23, a lower reversing pulley, 24, a front leveling truss, 25, a rear leveling truss, 26, a rear tension pulley, 27, a second anchor head, 28, a first counterweight, 29, a sliding rail, 30, a third sliding block, 31, a second counterweight, 32, a hydraulic station, 33, a third counter-force frame, 34 and a pushing type jack.

Detailed Description

The utility model will be further described with reference to the drawings and the specific examples.

As shown in fig. 1 to 10, the railway bridge replacement section-by-section transverse traction device of the utility model comprises a plurality of foundation plates 1 extending transversely, namely along the width direction of a railway, wherein the foundation plates 1 are fixed on each transverse girder of a sliding bracket. Each base plate 1 is fixed with a transverse slide rail 2.

The old beam body, namely the simply supported reinforced concrete T-beam, is formed by arranging a plurality of old beam sections 3 in sequence, each old beam section 3 is in sliding fit on a corresponding sliding rail 2 through a first sliding block 4, and specifically, a row of four first sliding blocks 4 are arranged below the end part of each old beam section 3. The new beam body, namely the turnout continuous steel box beam, is formed by arranging a plurality of new beam sections 5 in sequence, each new beam section 5 is in sliding fit on the corresponding sliding rail 2 through a second sliding block 6, and specifically, a row of 2-4 second sliding blocks 6 are arranged below the end part of each new beam section 5. The second slider 6 is higher than the first slider 4.

Each node of the old beam body and the new beam body is provided with a first traction system and a second traction system. The nodes are cross sections at regular intervals along the length of the railway, typically at the two ends of each new beam section 5 of the new beam body and at the two ends of each old beam section 3 of the old beam body.

Each first traction system comprises a first counter-force frame 7 fixed on the foundation plate 1 at the rear end of the sliding rail 2, a first traction jack 8 fixed on the first counter-force frame 7, a first traction rope 9, a front steel frame 10 and a rear steel frame 11 fixed on two sides of the old beam section 3. The lower part of the rear section steel frame 11 is provided with a lower tensioning wheel 12; the front end of the first traction rope 9 passes through a first anchor hole at the lower part of the front steel frame 10, and the front end of the first traction rope 9 clamps the front opening of the first anchor hole through a first anchor head 13; the middle section of the first traction rope 9 is tensioned through a lower tensioning wheel 12 and finally connected with the first traction jack 8.

The first traction system also includes a bottom steel truss 14 located below the old beam; the bottom steel truss 14 extends transversely, i.e. along the width of the railway, and is sleeved with a corresponding row of 4 first sliders 4, and a dense vertical fence 15 is arranged on the bottom steel truss 14 near each first slider 4, and the vertical fence 15 is welded with the adjacent first sliders 4. The front end and the rear end of the bottom-type steel truss 14 are protruded out of two sides of the old beam body, the top surfaces of the protruding parts at the front end and the rear end of the bottom-type steel truss 14 are connected with triangular frames 16 in a threaded mode, and vertical retaining plates of the triangular frames 16 are connected with side webs corresponding to the old beam body through implanted screw bars. The front steel frame 10 and the rear steel frame 11 are respectively welded on the side surfaces of the front and rear protruding parts of the bottom steel truss 14, and a steel diagonal bracing 17 is additionally welded between the front steel frame 10 or the rear steel frame 11 and the corresponding side surfaces of the protruding parts.

Each second traction system comprises a second counter-force frame 18 fixed on the foundation plate 1 at the rear end of the sliding rail 2, a second traction jack 19 fixed on the second counter-force frame 18, a second traction rope 20, an upper tensioning wheel 21 arranged on the upper part of the rear steel frame 11, an upper reversing wheel 22 arranged on the upper part of the front steel frame 10, a lower reversing wheel 23, a front leveling truss 24 and a rear leveling truss 25 fixed on two sides of the new beam section 5. The rear leveling truss 25 is provided with a rear tensioning wheel 26; the front end of the second traction rope 20 passes through a second anchor hole of the front leveling truss 24, the front end of the second traction rope 20 is clamped with the front opening of the second anchor hole through a second anchor head 27, the middle section of the second traction rope 20 is sequentially tensioned through a rear tensioning wheel 26, then is reversed through an upper reversing wheel 22 and a lower reversing wheel 23, and is tensioned through an upper tensioning wheel 21 and finally connected with a second traction jack 19. Since the second traction jack 19 and the second reaction frame 18 are higher than the first traction jack 8 and the first reaction frame 7, and the first traction jack 8 is behind, a traction rope 9 is provided on the second reaction frame 18 to avoid blocking.

A first counterweight 28 is fixed to both ends of the top surface of each new beam section 5. Two end parts of the top surface of each old beam section 3 are respectively fixed with a slide 29 extending along the width direction of the railway, each slide 29 is slidably matched with a second counterweight 31 through a third sliding block 30, the top surface of each old beam section 3 is fixed with a pushing jack 34 through a third reaction frame 33, and a piston of each pushing jack 34 is connected with the corresponding second counterweight 31. The hydraulic station 32 of the jack 34 is mounted on the second counterweight 31.

Of course, it is known from common knowledge that the device is further provided with a main controller, such as a PCB, and the traction jack and the pushing jack 34 are both in signal connection with the main controller.

As shown in fig. 1 to 10, the traction method based on the traction device of the present utility model includes the following steps.

Firstly, erecting a sliding support, namely piling from bottom to top according to the same steps as the prior art, pouring a concrete bearing platform, erecting a stand column, fixing longitudinal girders on the top ends of the stand column, and placing and fixing transverse girders on each longitudinal girder; and a foundation plate 1 and a sliding rail 2 which cross the railway are paved on each transverse girder of the sliding bracket.

And building and assembling each new beam section 5 of the new beam body outside the railway range at the front side of the sliding rail 2, and utilizing a second sliding block 6 fixed at the bottom of the new beam section 5 to slidingly match each new beam section 5 on the corresponding sliding rail 2. Jacking each old beam section 3 of the old beam body by using a jacking jack arranged on each pier of the old beam body, clamping a first sliding block 4 of each bottom type steel truss 14 into a corresponding sliding rail 2, pushing each bottom type steel truss 14 to the lower part of the corresponding old beam section 3, and then lowering the jacking jack to lower each old beam section 3 onto the corresponding bottom type steel truss 14; and then the web plates of the old beam sections 3 are fixed with the convex parts of the corresponding bottom-type steel trusses 14 by using the triangular frames 16, namely, the bottom plates of the triangular frames 16 are in threaded connection or welding with the convex parts of the bottom-type steel trusses 14, and the vertical abutting plates of the triangular frames 16 are in threaded connection with the corresponding side web plates of the old beam sections 3 through implanted screw bars.

And arranging a first traction system and a second traction system at each node of the old beam body and the new beam body.

At this time, the pre-preparation work is completed, and the core pulling step is entered.

The first traction type jack 8 and the second traction type jack 19 of the same node are synchronously started, an old beam section 3 and a new beam section 5 which is flush with the old beam section are synchronously transversely pulled until the old beam section 3 is pulled out of the safety range of the railway, such as a distance of 10 meters outside the railway, the first traction type jack 8 is closed, the second traction type jack 19 is continuously driven, and the new beam section 5 is continuously pulled until the new beam section 5 reaches the center line position of the railway.

When the old beam section 3 and the new beam section 5 which is flush with the old beam section 3 are synchronously pulled, the second counterweight 31 is positioned at the rear end of the slideway 29 on the top surface of the old beam section 3, and when the old beam section 3 is pulled in place and the first traction jack 8 is closed, the pushing jack 34 is driven to push the second counterweight 31 to the front end of the slideway 29.

It should also be emphasized that the present application essentially pertains to a section-by-section traction, i.e. a first section of old beam section 3 and a new beam section 5 flush therewith are drawn first, a second section of old beam section 3 and a new beam section 5 flush therewith are drawn again and again, each time a section of old beam section 3 and a section of new beam section 5 flush therewith are drawn until the whole new and old beam bodies are drawn in place.

Claims (3)

1. A railway bridge old-moving and new-changing section-by-section transverse traction device comprises a plurality of transversely extending foundation plates, wherein a sliding rail is fixed on each foundation plate; each old beam Duan Jingdi-sliding block of the old beam body is in sliding fit on a corresponding sliding rail, and each new beam Duan Jingdi-sliding block of the new beam body is in sliding fit on a corresponding sliding rail; be fixed with first reaction frame on the basis board of slide rail rear end, first traction type jack, its characterized in that are installed to first reaction frame: the second sliding block is higher than the first sliding block; each node of the old beam body and the new beam body is provided with a first traction system and a second traction system; the first traction system comprises a first traction rope, a front steel frame and a rear steel frame which are fixed on the old beam Duan Liangce; the lower part of the rear section steel frame is provided with a lower tensioning wheel; the front end of the first traction rope passes through a first anchor hole at the lower part of the front steel frame, and the front end of the first traction rope is clamped at the front opening of the first anchor hole through a first anchor head; the middle section of the first traction rope is stretched by a lower tension wheel and is connected with a first traction jack; the second traction system comprises a second reaction frame fixed on a foundation plate at the rear end of the sliding rail, a second traction jack fixed on the second reaction frame, a second traction rope, an upper tensioning wheel arranged at the upper part of a rear steel frame, an upper reversing wheel and a lower reversing wheel arranged at the upper part of a front steel frame, a front leveling truss and a rear leveling truss fixed on a new beam Duan Liangce, wherein the rear leveling truss is provided with a rear tensioning wheel; the front end of the second traction rope penetrates through a second anchor hole of the front leveling truss, the front end of the second traction rope clamps a front opening of the second anchor hole through a second anchor head, and the middle section of the second traction rope is sequentially stretched through a rear tensioning wheel, then is reversed through an upper reversing wheel and a lower reversing wheel, and is stretched through an upper tensioning wheel and connected with a second traction jack.

2. The railroad bridge distressing and renewing section-by-section transverse traction device of claim 1, wherein: the end part of the top surface of the new beam section is fixed with a first counterweight; the end of the old beam Duan Dingmian is fixed with a slideway extending along the width direction of the railway, the slideway is slidably matched with a second counterweight through a third sliding block, the old beam Duan Dingmian is fixed with a pushing jack through a third reaction frame, and a piston of the pushing jack is connected with the second counterweight.

3. The railroad bridge distressing and renewing section-by-section transverse traction device of claim 2, wherein: the hydraulic station of the pushing jack is arranged on the second counterweight.

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