CN212452314U

CN212452314U - Bridge tensioning trolley with simple support and continuous negative moment

Info

Publication number: CN212452314U
Application number: CN202021135719.3U
Authority: CN
Inventors: 代泽森; 周航; 方学坤; 许传平; 熊伦; 冯光涛; 王艺
Original assignee: GUIZHOU BRIDGE CONSTRUCTION GROUP CO Ltd
Current assignee: GUIZHOU BRIDGE CONSTRUCTION GROUP CO Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-02
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses an earlier simply prop back continuous negative moment stretch-draw platform truck of bridge, including bottom support, the middle of bottom support is vertical upwards to be provided with 1 outer steel pipe, outer steel pipe inside penetrates 1 interior steel pipe, outer steel pipe outer wall symmetry is equipped with 2 vertical ascending angle steel, 2 angle steel tops are connected with the supporting steel plate bottom, supporting steel plate fixed surface has 2 installation steel sheets, be equipped with the pulley between the installation steel sheet, be equipped with on the supporting steel plate of pulley below and wear the hole, wire rope is through the pulley and wear behind the hole, be connected with interior steel pipe top, the wire rope other end is connected with the hoist engine, the hoist engine is connected with the motor, the bottom of interior steel pipe is connected with the slide rail, the one end of slide rail is rotated and is connected with the jack mounting panel, install the jack on the jack. The trolley lifts the jack by utilizing a rotary and telescopic structure, can realize one-time numerical control tensioning of the whole bundle of steel strands, greatly reduces the working strength, ensures uniform stress of the same bundle of steel strands, and realizes the purpose of numerical control tensioning.

Description

Bridge tensioning trolley with simple support and continuous negative moment

Technical Field

The utility model relates to a bridge is simple earlier and is supported continuous hogging moment stretch-draw platform truck in back belongs to bridge construction equipment technical field.

Background

In order to optimize the stress state of a beam bridge structure, the beam bridge mostly adopts a structural form of simply supporting and then continuously, and the bridge stress system conversion of the bridge is realized by a system of simply supporting and then continuously relying on hogging moment prestress. The T-shaped beam bridge hogging moment prestress is characterized in that a pore channel is reserved when a beam slab is prefabricated, a cast-in-situ section is manufactured at the top of a pier after erection, and prestress tensioning is carried out on the lower edge of the beam slab. Because of the restriction of construction environment, the hogging moment tensioning end is positioned at the lower rafter of the T-beam wing plate, the manual operation is carried out from a wet joint by a special stair, the terrain is narrow, the operation can be carried out by only one person, the weight of a jack above 200T exceeds 100kg, the hogging moment tensioning end is not provided with a supporting platform, the whole bundle of tensioning jacks cannot be lifted by the manual operation, so that the conventional tensioning system adopts a small jack (commonly known as a bullet jack and weighing about 10 kg) to carry out single tensioning, the working strength is increased, the numerical control tensioning is not facilitated, the stress of the same bundle of steel hinge wires is not uniform, and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a continuous hogging moment stretch-draw platform truck after bridge is simple earlier. The trolley lifts the jack by utilizing a rotary and telescopic structure, can realize one-time numerical control tensioning of the whole bundle of steel strands, greatly reduces the working strength, ensures uniform stress of the same bundle of steel strands, and realizes the purpose of numerical control tensioning.

The technical scheme of the utility model: the utility model provides an earlier simply prop back continuous negative moment stretch-draw platform truck of bridge, including bottom support, the middle of bottom support is vertical upwards to be provided with 1 outer steel pipe, outer steel pipe internally penetrates 1 interior steel pipe, outer steel pipe outer wall symmetry is equipped with 2 vertical ascending angle steel, 2 angle steel tops are connected with the supporting steel plate bottom, supporting steel plate fixed surface has 2 installation steel sheets, be equipped with the pulley between the installation steel sheet, be equipped with on the supporting steel sheet of pulley below and wear the hole, wire rope is through the pulley and wear behind the hole, be connected with interior steel pipe top, the wire rope other end is connected with the hoist engine, the hoist engine is connected with the motor, the bottom of interior steel pipe is connected with the slide rail, the one end of slide rail is rotated and is connected with the jack mounting panel, install.

In the continuous hogging moment tensioning trolley after simply supporting, a winch mounting platform is arranged above the bottom support, a winch and a motor are fixed on the winch mounting platform, and the winch mounting platform is connected with the bottom support through a plurality of inclined support rods.

In the continuous hogging moment tensioning trolley after simply supporting, the front end and the rear end of the outer wall of the jack are respectively connected with one end of the hemp rope, and the hemp rope passes through the hemp rope control hole formed in the middle of the top surface of the sliding rail and then is hung on the hook on the outer wall of the top end of the outer steel pipe.

In the preceding simple back continuous hogging moment stretch-draw platform truck of bridge, the slide rail including with interior steel pipe bottom surface fixed connection's connecting steel plate, the outer channel-section steel of connecting steel plate bottom fixedly connected with, movable card is gone into between connecting steel plate and the outer channel-section steel has interior channel-section steel, and the one end of interior channel-section steel is rotated and is connected with the jack mounting panel.

In the continuous hogging moment stretch-draw platform truck after aforementioned bridge is simply supported earlier, the end connection that connecting plate is close to the jack mounting panel has the baffle that stretches out downwards, is located the inside groove steel afterbody of connecting plate and outer channel steel and is equipped with the dog.

In the continuous hogging moment stretch-draw platform truck after aforementioned bridge is simply supported earlier, interior steel pipe top inner wall fixed connection U type lifting hook, U type lifting hook and lifting hook are connected, lifting hook top and wire rope swing joint.

In the continuous hogging moment tensioning trolley after simply supporting the bridge, the winch mounting platform is arranged at the back of the outer steel pipe, and the bottom of the winch mounting platform is connected with the outer steel pipe through the support steel bars.

In the continuous hogging moment stretch-draw platform truck after the simple support of foretell bridge, the bottom support comprises many steel sheets interconnect that indulge, violently set up, and outer steel pipe bottom back is through strengthening channel-section steel and bottom support connection.

In the continuous hogging moment tensioning trolley after simply supporting the bridge, oblique reinforcing angle steel is connected between the steel plates longitudinally and transversely arranged on the bottom support.

In the continuous hogging moment tensioning trolley after simply supporting the bridge, the bottom of the bottom support is provided with the travelling wheels.

The utility model has the advantages that: compared with the prior art, the utility model solves the lifting problem of the jack by installing the inner steel pipe and the outer steel pipe on the bottom bracket and lifting the jack by the bottom of the inner steel pipe through the slide rail; when the lifting jack is used, the inner steel pipe is driven by the winch through the steel wire rope to move up and down, so that the inner steel pipe and the sliding rail extend downwards from the wet joint to be positioned on the lower rafter of the T-shaped beam wing plate, and the lifting jack is positioned at a tensioning position by rotating the inner steel pipe and stretching the sliding rail, so that the positioning problem of the lifting jack is solved; the horizontal rotation angle of the jack can be adjusted through the hemp rope, the penetration hole of the jack is ensured to be in the same direction with the extension line of the steel strand, and the steel strand is conveniently penetrated. The trolley is simple in structure and convenient to operate, and can realize one-time numerical control tensioning of the whole bundle of steel strands through simple mechanical combination, so that the working strength is greatly reduced, the stress of the same bundle of steel strands is uniform, and the purpose of numerical control tensioning is realized.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of FIG. 1;

FIG. 3 is a schematic top view of the structure of FIG. 1;

FIG. 4 is a schematic structural view of a slide rail;

fig. 5 is a schematic cross-sectional structure of fig. 4.

Reference numerals: 1-bottom bracket, 2-outer steel pipe, 3-inner steel pipe, 4-angle steel, 5-supporting steel plate, 6-mounting steel plate, 7-pulley, 8-steel wire rope, 9-winch, 10-motor, 11-slide rail, 12-jack mounting plate, 13-jack, 14-winch mounting platform, 15-diagonal support rod, 16-hemp rope, 17-hook, 18-connecting steel plate, 19-outer steel channel, 20-inner steel channel, 21-baffle, 22-baffle, 23-U-shaped hook, 24-hook, 25-supporting steel bar, 26-reinforcing steel channel, 27-diagonal reinforcing angle steel, 28-road wheel and 29-hemp rope control hole.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

The embodiment of the utility model provides a: a bridge tensioning trolley with simple support and continuous negative moment comprises 1

bottom support

1, 1 outer steel pipe 2 is fixedly welded upwards vertically at the middle position of the

bottom support

1, 1 inner steel pipe 3 penetrates into the

outer steel pipe

2, 2 vertically upwards angle steels 4 are symmetrically arranged on the outer wall of the upper end of the outer steel pipe 2, the top ends of the 2 angle steels 4 are welded with the bottom of a supporting

steel plate

5, 2 mounting steel plates 6 are fixedly arranged on the surface of the supporting

steel plate

5, 1 pulley 7 is arranged between the mounting

steel plates

6, 1 penetrating hole is arranged on the supporting steel plate 5 below the pulley 7, a steel wire rope 8 is guided by the pulley 7 and then extends into the penetrating hole, then be connected with interior steel pipe 3 top, can drive interior steel pipe 3 through wire rope 8 and reciprocate along outer steel pipe 2, can not drive wire rope 8 and rotate together in the rotation process of interior steel pipe 3 simultaneously. The other end of the wire rope 8 is connected to a hoist 9, and the hoist 9 is connected to a motor 10 and driven by the motor 10. The bottom of the inner steel pipe 3 is connected with a sliding rail 11 which is horizontally arranged, one end of the sliding rail 11 is rotatably connected with 1 jack mounting plate 12, a jack 13 is fixedly mounted on the jack mounting plate 12, and the large jack outside the jack 13 can stretch and draw the whole bundle of steel strands at one time.

In the use process, the bottom bracket 1 of the trolley is placed on wing plates at two sides of the wet joint and moved to the hogging moment tensioning notch. Whether each part is normal is checked, the inner steel pipe 3 is rotated to enable the sliding rail 11 at the bottom of the inner steel pipe to be parallel to the length direction of the wet joint, then the motor 10 is electrified, the motor 10 drives the winch 9 to rotate, the steel wire rope 8 wound on the winch 9 is enabled to be unreeled, the inner steel pipe 3 moves downwards along the outer steel pipe 2, and the sliding rail 11 is enabled to penetrate through the wet joint and then is located below the wet joint. When the jack 13 is at a similar level to the steel strand, the motor 10 is stopped. The worker goes down from the wet joint, rotates the sliding rail 11, adjusts the length of the sliding rail 11 to enable the jack 13 to be close to the web plate of the T-shaped beam, and then rotates the jack mounting plate 12 to enable the penetrating port of the jack 13 to be in the same direction and on the same section with the extension line of the steel strand to be tensioned. And (4) subsequently tensioning the steel strand according to the conventional whole bundle tensioning process of the steel strand. The method mainly comprises the following steps: penetrating anchorage device and clamping piece → penetrating jack 13 and mounting sensor → penetrating clamping piece → tensioning machine is powered on → tension force and theoretical elongation value are input → point start button starts tensioning → final tension holds load for 5min → oil return → data export.

After tensioning is finished, the jack 13 moves out the steel strand, then the sliding rail 11 rotates to align with the wet joint, the motor 10 is started to drive the winch 9 to rotate reversely, the steel wire rope 8 is wound on the winch 9, the inner steel pipe 3 is lifted upwards, and the sliding rail 11 moves out to the top of the T-shaped beam. And repeating the steps, and performing hogging moment tensioning on the next T-shaped beam.

A winch mounting platform 14 is arranged above the bottom support 1, the winch 9 and the motor 10 are fixedly mounted on the winch mounting platform 14, and the winch mounting platform 14 is connected with the bottom support 1 in a welding mode through a plurality of inclined support rods 15. The winch 9 and the motor 10 and other components are all arranged on the trolley, so that the integral movement and carrying are convenient.

The front end and the rear end of the outer wall of the jack 13 are respectively connected with one end of a hemp rope 16, and the hemp rope 16 is hung on a hook 17 on the outer wall of the top end of the outer steel pipe 2 after passing through a hemp rope control hole 29 arranged in the middle of the top surface of the slide rail 11. The hemp rope 16 penetrates into the control hole 29, so that the friction damage of the hemp rope 16 and the T-shaped beam can be avoided, and the service life of the hemp rope 16 is prolonged. The jack 13 is to ensure that the penetration opening is in the same direction as the steel strand in the strand penetrating process, and at the moment, the hemp rope 16 is pulled, so that the jack 13 is driven to rotate around the slide rail 11, and the penetration opening of the jack 13 is ensured to be in the same direction as the steel strand. The twine 16 is hung on the hook 17 when not in use, and is prevented from being entangled with other components.

The slide rail 11 is including the connecting steel plate 18 with 3 bottom surfaces fixed welded connection of interior steel pipe, and connecting steel plate 18 bottom fixed welded connection has outer channel-section steel 19, and connecting steel plate 18 constitutes 1 cavity structures with outer channel-section steel 19, and the activity card has interior groove steel 20 in this cavity structures, and the one end of interior groove steel 20 is rotated and is connected with jack mounting panel 12. The length of the whole slide rail 11 can be changed by sliding the inner channel steel 20 in the using process.

The end part of the connecting steel plate 18 close to the jack mounting plate 12 is connected with a baffle 21 extending downwards, and a stop block 22 is arranged at the tail part of an inner channel steel 20 positioned inside the connecting steel plate 18 and the outer channel steel 19. The baffle 21 and the stop block 22 are arranged to play a limiting role, and the phenomenon that the inner channel steel 20 slides out of a cavity structure formed by the connecting steel plate 18 and the outer channel steel 19 after being stretched outwards for too long is avoided. When stop 22 comes out of contact with stop 21, inner channel steel 20 cannot slide out further.

The inner wall of the top end of the inner steel pipe 3 is fixedly connected with a U-shaped lifting hook 23, the U-shaped lifting hook 23 is connected with a lifting hook 24, and the top of the lifting hook 24 is movably connected with a steel wire rope 8. Thereby ensuring that the inner steel pipe 3 can not drive the steel wire rope 8 to rotate together in the rotating process.

The winch mounting platform 14 is arranged on the back of the outer steel pipe 2, and the bottom of the winch mounting platform is connected with the top end of the outer steel pipe 2 through a support steel bar 25. Thereby fixing the top end of the outer steel pipe 2 and ensuring the vertical state thereof.

Bottom support 1 comprises many steel sheet interconnect of indulging, violently setting, and outer steel pipe 2 bottom back and enhancement channel-section steel 26 welded connection strengthen the channel-section steel 26 and weld on bottom support 1. The fixed welding area of the outer steel pipe 2 is increased by arranging the reinforcing channel steel 26, and the firm connection between the outer steel pipe and the bottom support 1 is guaranteed.

And oblique reinforcing angle steels 27 are further connected between the steel plates longitudinally and transversely arranged on the bottom bracket 1, so that the connection strength of the whole bottom bracket 1 is enhanced.

And a travelling wheel 28 is arranged at the bottom of the bottom support 1, so that the whole trolley can be conveniently moved.

The specific application conditions are as follows: the method is characterized in that a section I contract from the JiangKou to the Duge expressway of Guizhou province to the Shanghai section is Van' an, the expressway road base is 24.5m wide, T-shaped pivots are arranged in the section I contract and communicated with each other, wherein a main line beam 6 seat and a ramp bridge 6 seat are mainly a simply supported and then structurally continuous prestressed T-beam bridge, and the T-beam 679 is prefabricated. Except for the expansion joint, each continuous T-shaped beam is provided with 6 bundles of negative bending moment prestressed steel bars, each bundle is 3, the single T-shaped beam is provided with 18 prestressed steel hinge lines, and the single span of 5T-shaped beams has 90 steel hinge lines. On average, every 4 spans of a single width are connected in series, 136 spans are formed, 34 spans are formed, 102 continuous sections are provided, and 9180 steel strand wires and 3060 bundles need to be tensioned. The economic benefit analysis is shown in table 1:

TABLE 1 analysis of economic benefits of the hogging moment tensioning trolley used for the jar opening I mark

The I-standard 12-seat bridge is opened, 102 pier top continuous sections or consolidation sections are adopted, and the hogging moment tensioning trolley is adopted to intelligently tension hogging moment prestress steel hinge lines, so that the engineering cost is saved by 229500 yuan.

Claims

1. The utility model provides a bridge is simple earlier and is followed continuous hogging moment stretch-draw platform truck which characterized in that: comprises a bottom bracket (1), wherein 1 outer steel pipe (2) is vertically and upwards arranged in the middle of the bottom bracket (1), 1 inner steel pipe (3) penetrates into the outer steel pipe (2), 2 vertically and upwards angle steels (4) are symmetrically arranged on the outer wall of the outer steel pipe (2), the top ends of the 2 angle steels (4) are connected with the bottom of a supporting steel plate (5), 2 mounting steel plates (6) are fixed on the surface of the supporting steel plate (5), pulleys (7) are arranged between the mounting steel plates (6), penetrating holes are arranged on the supporting steel plate (5) below the pulleys (7), a steel wire rope (8) passes through the pulleys (7) and the penetrating holes and is connected with the top of the inner steel pipe (3), the other end of the steel wire rope (8) is connected with a winch (9), the winch (9) is connected with a motor (10), the bottom of the inner steel pipe (3) is connected with a slide rail (11), one end of the slide rail (11, the jack mounting plate (12) is provided with a jack (13).

2. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: a winch mounting platform (14) is arranged above the bottom support (1), a winch (9) and a motor (10) are fixed on the winch mounting platform (14), and the winch mounting platform (14) is connected with the bottom support (1) through a plurality of inclined support rods (15).

3. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: the front end and the rear end of the outer wall of the jack (13) are respectively connected with one end of a hemp rope (16), and the hemp rope (16) is hung on a hook (17) on the outer wall of the top end of the outer steel pipe (2) after passing through a hemp rope control hole (29) formed in the middle of the top surface of the sliding rail (11).

4. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: the sliding rail (11) comprises a connecting steel plate (18) fixedly connected with the bottom surface of the inner steel pipe (3), an outer channel steel (19) fixedly connected with the bottom of the connecting steel plate (18), an inner channel steel (20) is movably clamped between the connecting steel plate (18) and the outer channel steel (19), and one end of the inner channel steel (20) is rotatably connected with a jack mounting plate (12).

5. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 4, characterized in that: the end part of the connecting steel plate (18) close to the jack mounting plate (12) is connected with a baffle (21) extending downwards, and a stop block (22) is arranged at the tail part of an inner channel steel (20) inside the connecting steel plate (18) and an outer channel steel (19).

6. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: interior steel pipe (3) top inner wall fixed connection U type lifting hook (23), U type lifting hook (23) are connected with lifting hook (24), lifting hook (24) top and wire rope (8) swing joint.

7. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 2, characterized in that: the winch mounting platform (14) is arranged on the back of the outer steel pipe (2), and the bottom of the winch mounting platform is connected with the outer steel pipe (2) through a support steel bar (25).

8. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: the bottom support (1) is formed by connecting a plurality of longitudinal steel plates and a plurality of transverse steel plates, and the back of the bottom end of the outer steel pipe (2) is connected with the bottom support (1) through a reinforcing channel steel (26).

9. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 7, characterized in that: and oblique reinforcing angle steel (27) is also connected between the steel plates which are longitudinally and transversely arranged on the bottom bracket (1).

10. The bridge simply supported and then continuous hogging moment tensioning trolley according to claim 1, characterized in that: and a travelling wheel (28) is arranged at the bottom of the bottom bracket (1).