Crawler-type jacking system and jacking construction method for steel box beam

Abstract

The present invention provides a crawler-type jacking system and jacking construction method for steel box girders, which belong to the field of new technology application of traffic engineering. The crawler-type jacking system for steel box girders is composed of a transverse shift conversion support, a cushion beam, a jacking cylinder, a lifting cylinder, a transverse shift cylinder, a transverse shift sliding beam, a base, a track plate, a sliding beam, a slider, a ratchet block, and a pin shaft. The equipment can realize the smooth jacking of steel box girders without adding jacking slide plates and strengthening the cross section of steel box girders, and without lifting and lowering the steel box girders to convert the working conditions during the jacking process, and can also realize the transverse shift of steel box girders in a larger range.

Description

Technical Field

[0001] The invention relates to a crawler-type jacking system and a jacking construction method for a steel box girder, and belongs to the field of new technology application of traffic engineering. Background Art

[0002] The jacking construction of steel box girders is an important construction form in the field of steel box girder installation, and is particularly suitable for the erection of steel box girder bridges such as multi-span continuous beam bridges and overpass bridges. Currently, the widely used jacking construction technologies include the ratchet block jacking technology and the walking jacking technology. The ratchet block jacking technology requires an additional slide plate at the bottom of the steel box girder as the jacking force application point during jacking; the walking jacking technology requires a larger action surface during jacking, and the jacking action surface range of the standard section of the steel box girder needs to be additionally strengthened. At the same time, during the jacking process, when the jacking jack of the steel box girder returns oil, the steel box girder needs to be lifted as a whole, and the beam can be lowered after the oil returns to the right position. The system conversion is relatively complicated. Summary of the invention

[0003] In view of the above-mentioned construction status of steel box girder jacking, the present invention has conducted a series of studies on the steel box girder jacking construction technology, and combined the advantages and disadvantages of both to provide a crawler jacking system for steel box girders, which solves the following technical problems: the equipment can achieve smooth jacking of the steel box girder without adding jacking slides and strengthening the cross-section of the steel box girder, and there is no need to lift and lower the steel box girder for working condition conversion during the jacking process, and it can also achieve a larger range of lateral movement of the steel box girder.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A crawler-type jacking system for a steel box girder comprises a base, a chain mechanism, a jacking mechanism, a lifting mechanism and a transverse movement mechanism;

[0006] The chain mechanism is located above the base, and includes a plurality of track plates connected by pins to form a ring structure, and a plurality of grooves are arranged at intervals on the surface;

[0007] The push mechanism is arranged on the chain mechanism and is used to drive the chain mechanism to cyclically rotate the push mechanism, and comprises a slider, a ratchet block and a push cylinder. The push cylinder is arranged on the slideway base, a slider is arranged at the cylinder rod end of the push cylinder, the ratchet block is arranged on the slider, and the push cylinder pushes the slider to move so that the ratchet block can be embedded in the groove body;

[0008] The transverse movement mechanism includes a transverse movement oil cylinder, a transverse movement slide beam and a slide beam. One end of the transverse movement oil cylinder is arranged on the transverse movement slide beam, and the other end is arranged on the slide beam, and is used to push the slide beam to move back and forth relative to the transverse movement slide beam, and the transverse movement oil cylinder moves in the longitudinal direction relative to the base;

[0009] The jacking mechanism comprises a jacking cylinder, one end of which is arranged on the base, and the other end of which is arranged on the transverse sliding beam, and can drive the steel box girder to move up and down in the vertical direction of the base.

[0010] The crawler jacking system for the steel box girder also includes a cushion beam, and transverse shift conversion supports are respectively arranged on both sides of the cushion beam. The base is located above the cushion beam, and the continuous operation of rapid transverse shift of the steel box girder is realized through the operation of the transverse shift conversion support and the jacking cylinder.

[0011] A stainless steel plate is provided on the top surface of the sliding beam and the transverse sliding beam.

[0012] The contact portion between the sliding beam and the transverse sliding beam and the bottom surface of the track shoe are provided with an MGE sliding plate.

[0013] There are four lifting cylinders arranged in a quadrilateral, which provides better stability.

[0014] A method for jacking construction using a crawler jacking system for a steel box girder comprises the following steps:

[0015] Pushing steps: During pushing, the push cylinder pushes the slider, and the track shoe is driven to rotate around the slide beam through the ratchet block embedded in the track shoe, so as to achieve smooth advancement of the steel box beam acting on the upper part of the slide beam;

[0016] Transverse movement steps: 1) The transverse movement cylinder drives the sliding beam and steel box beam to move transversely;

[0017] 2) The lifting cylinder drops down to make the lateral shift conversion support bear force, and the sliding beam and track shoe are separated from the steel box beam;

[0018] 3) The transverse cylinder drives the slide beam and track shoe to return to their original position;

[0019] 4) The lifting cylinder lifts the top so that the sliding beam and the track shoe contact the steel box beam and are stressed, and are separated from the transverse shift conversion support;

[0020] 5) Repeat steps 1-4 to achieve continuous transverse movement of the steel box girder.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The lifting cylinder is arranged in a quadrilateral shape, which has better stability and more balanced force on the cylinder; 2. The crawler-type propulsion method is fast and can realize continuous jacking operation; 3. The equipment can realize continuous transverse movement of the steel box girder, with a larger transverse movement range and wider applicability; 4. The structure is lighter, easy to operate, disassemble and transport; 5. No additional auxiliary facilities are required, which saves construction costs and project investment and has good economic efficiency. The equipment does not need to add a jacking slide plate or strengthen the cross section of the steel box girder. During the jacking process, there is no need to lift and lower the steel box girder for working condition conversion, which realizes the stable jacking of the steel box girder and can also realize the transverse movement of the steel box girder in a larger range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0023] Figure 1 :Structure diagram Figure 1

[0024] Figure 2 :Structure diagram Figure 2

[0025] Figure 3 :Structure diagram Figure 3

[0026] Figure 4 :Structure diagram Figure 4

[0027] Figure 5 : Schematic diagram of jacking (arrows from top to bottom represent the movement direction of the steel box girder, jacking cylinder, and track shoe)

[0028] Figure 6 : Schematic diagram of the horizontal movement step 1)

[0029] Figure 7 : Schematic diagram of the horizontal shift step 2)

[0030] Figure 8 : Schematic diagram of step 3)

[0031] Fig. 9 : Horizontal shift step 4) diagram

[0032] In the figure: 1 steel box girder, 2 transverse shift conversion support, 3 cushion beam, 4 pushing cylinder, 5 lifting cylinder, 6 transverse shift cylinder, 7 transverse shift sliding beam, 8 base, 9 track shoe, 10 sliding beam, 11 slider, 12 ratchet block, 13 pin shaft. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] A crawler-type jacking system for a steel box girder comprises a base, a chain mechanism, a jacking mechanism, a lifting mechanism and a transverse movement mechanism;

[0035] The chain mechanism is located above the base 8, and includes a plurality of track shoes 9 connected into a ring structure through a pin shaft 13, and a plurality of grooves are arranged at intervals on the surface;

[0036] The push mechanism is arranged on the chain mechanism and is used to drive the chain mechanism to cyclically rotate the push mechanism, and includes a slider 11, a ratchet block 12 and a push cylinder 4. The push cylinder 4 is arranged on the slideway base 8. The slider 11 is arranged at the cylinder rod end of the push cylinder 4. The ratchet block 12 is arranged on the slider 11. The push cylinder 4 pushes the slider to move so that the ratchet block 12 can be embedded in the groove body.

[0037] The transverse movement mechanism includes a transverse movement cylinder 6, a transverse movement slide beam 7 and a slide beam 10. One end of the transverse movement cylinder 6 is arranged on the transverse movement slide beam 7, and the other end is arranged on the slide beam 10, and is used to push the slide beam 10 to move back and forth relative to the transverse movement slide beam 7, and the transverse movement cylinder 6 moves in the longitudinal direction relative to the base 8;

[0038] The jacking mechanism includes a jacking cylinder 5 , one end of which is arranged on the base 8 , and the other end of which is arranged on the transverse sliding beam 7 , and can drive the steel box girder to move up and down in the vertical direction along the base 8 .

[0039] Preferably, the crawler jacking system for the steel box girder also includes a cushion beam 3, and transverse movement conversion supports 2 are respectively arranged on both sides of the cushion beam 3. The base 8 is located above the cushion beam 3, and the continuous operation of rapid transverse movement of the steel box girder 1 is realized through the operation of the transverse movement conversion support 2 and the jacking cylinder 6.

[0040] Preferably, stainless steel plates are provided on the top surfaces of the sliding beam 10 and the transverse sliding beam 7 .

[0041] Preferably, an MGE slide plate is provided at the portion where the sliding beam 10 contacts the transverse sliding beam 7 and at the bottom surface of the track shoe 9 .

[0042] Preferably, there are four lifting cylinders 5 arranged in a quadrilateral for better stability.

[0043] A method for jacking construction using a crawler jacking system for a steel box girder comprises the following steps:

[0044] Pushing step; during pushing, the push cylinder 4 pushes the slider 11, and drives the track shoe 9 to rotate around the slide beam 10 through the ratchet block 12 embedded in the track shoe, so as to achieve smooth advancement of the steel box beam 1 acting on the upper part of the slide beam 10;

[0045] Transverse movement steps: 1) The transverse movement cylinder 6 drives the sliding beam 10 and the steel box beam 1 to move transversely;

[0046] 2) The lifting cylinder 5 is lowered to apply force to the lateral shift conversion support 2, and the sliding beam 10 and the track shoe 9 are separated from the steel box beam 1;

[0047] 3) The traverse cylinder 6 drives the slide beam 10 and the track shoe 9 to return to their original positions;

[0048] 4) The lifting cylinder 4 is lifted to make the sliding beam 10 and the track shoe 9 contact with the steel box beam 1 and be stressed, and separate from the transverse shift conversion support 2;

[0049] 5) Repeat steps 1-4 to achieve continuous transverse movement of the steel box girder 1.

[0050] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crawler-type jacking system for a steel box girder, characterized in that: It includes a base, a chain mechanism, a pushing mechanism, a lifting mechanism and a transverse movement mechanism; The chain mechanism is located above the base, and includes a plurality of track plates connected by pins to form a ring structure, and a plurality of grooves are arranged at intervals on the surface; The push mechanism is arranged on the chain mechanism and is used to drive the chain mechanism to cyclically rotate the push mechanism, and comprises a slider, a ratchet block and a push cylinder. The push cylinder is arranged on the slideway base, a slider is arranged at the cylinder rod end of the push cylinder, the ratchet block is arranged on the slider, and the push cylinder pushes the slider to move so that the ratchet block can be embedded in the groove body; The transverse movement mechanism includes a transverse movement oil cylinder, a transverse movement slide beam and a slide beam. One end of the transverse movement oil cylinder is arranged on the transverse movement slide beam, and the other end is arranged on the slide beam, and is used to push the slide beam to move back and forth relative to the transverse movement slide beam, and the transverse movement oil cylinder moves in the longitudinal direction relative to the base; The jacking mechanism includes a jacking cylinder, one end of which is arranged on the base, and the other end is arranged on the transverse sliding beam, which can drive the steel box beam to move up and down along the vertical direction of the base; The crawler-type jacking system for the steel box girder also includes a cushion beam, and transverse shift conversion supports are respectively arranged on both sides of the cushion beam, and the base is located above the cushion beam.

2. The crawler-type jacking system for steel box beams according to claim 1 is characterized in that: Stainless steel plates are provided on the top surfaces of the sliding beam and the transverse sliding beam.

3. The crawler-type jacking system for steel box beams according to claim 1 is characterized in that: The MGE slide plate is arranged on the contact part between the sliding beam and the transverse sliding beam and the bottom surface of the track shoe.

4. The crawler-type jacking system for steel box beams according to claim 1 is characterized in that: There are four lifting cylinders, which are arranged in a quadrilateral.

5. A method for jacking construction using the crawler jacking system for steel box beams according to any one of claims 1 to 4, characterized in that: The following steps are involved: Pushing steps: During pushing, the push cylinder pushes the slider, and the track shoe is driven to rotate around the slide beam through the ratchet block embedded in the track shoe, so as to achieve smooth advancement of the steel box beam acting on the upper part of the slide beam; Transverse movement steps: 1) The transverse movement cylinder drives the sliding beam and steel box beam to move transversely; 2) The lifting cylinder drops down to make the lateral shift conversion support bear force, and the sliding beam and track shoe are separated from the steel box beam; 3) The transverse cylinder drives the slide beam and track shoe to return to their original position; 4) The lifting cylinder lifts the top so that the sliding beam and the track shoe contact the steel box beam and are stressed, and are separated from the transverse shift conversion support; 5) Repeat steps 1-4 to achieve continuous transverse movement of the steel box girder.

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