Adjustable frame plate track bed jacking method

Abstract

The invention provides an adjustable frame plate track bed jacking method which comprises the steps that S1, a fastener is detached, and sundries in a central ditch of an adjustable frame plate track bed are removed; s2, selecting an even number of mechanical jacks, placing the mechanical jacks on two sides of the central ditch, correspondingly operating the mechanical jacks to lift one by one by a worker, abutting against the bottom of the adjustable frame plate ballast bed and then stopping, S3, independently and slowly shaking the mechanical jacks on one side of the central ditch, and observing whether the adjustable frame plate ballast bed is loosened or not, the adjustable frame plate ballast bed can be loosened until all the mechanical jacks jack the adjustable frame plate ballast bed; s4, the mechanical jack is shaken at a constant speed until the ballast bed is lifted to a preset height, the height adjusting base plate is placed at a preset position of the bottom of the ballast bed, and the jack is slowly loosened; s5, fixed connection between the fasteners and the adjustable frame plate ballast bed is recovered, and the upper portion of the central ditch is covered with a ditch cover plate; the method has the effects of reducing construction cost and improving construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to a method for lifting an adjustable frame plate track bed. Background Art

[0002] During the construction of rail transit, it is necessary to select a suitable integral ballast according to the geological conditions. The adjustable frame plate ballast is suitable for special areas such as ground fissures. The adjustment of the adjustable frame plate ballast can reset the track settlement or offset caused by the activity of ground fissures, and eliminate uneven deformations such as local uplift, uneven settlement, and laying height difference.

[0003] In the relevant technology, the traditional adjustment method requires the use of four hydraulic jacks, a generator and a hydraulic oil pump. The hydraulic oil pump is driven by the generator, and the hydraulic oil pump injects high-pressure oil to the four hydraulic jacks through the oil pipe to lift the adjustable frame plate roadbed.

[0004] Regarding the above-mentioned related technologies, during the jacking operation of multiple adjustable frame plate roadbeds, a large amount of equipment needs to be repeatedly erected and dismantled, and manpower is required to transfer the equipment between sections, which not only consumes a lot of man-hours and high construction costs, but also has low construction efficiency, resulting in a long construction period. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable frame plate roadbed jacking method to solve the problems of high construction cost and low construction efficiency.

[0006] In order to achieve the above object, the present invention provides an adjustable frame plate track bed jacking method, which adopts the following technical scheme:

[0007] A method for lifting an adjustable frame plate roadbed, comprising: S1, removing a fixed connection between a fastener and the adjustable frame plate roadbed, and clearing debris in a central ditch of the adjustable frame plate roadbed;

[0008] S2. Use an even number of mechanical jacks and place them on both sides of the central ditch. Have multiple workers operate the mechanical jacks one by one and slowly raise them. The top claws of each mechanical jack will contact the bottom of the adjustable frame plate ballast and then stop until all mechanical jacks contact the bottom of the adjustable frame plate ballast.

[0009] S3. Slowly shake the mechanical jack on one side of the central ditch alone and observe whether the adjustable frame plate roadbed is loose; if it is not loose, stop shaking the mechanical jack and inspect the adjustable frame plate roadbed; if it is loose, test the mechanical jack on the other side of the central ditch until all mechanical jacks can loosen the adjustable frame plate roadbed;

[0010] S4. Shake the mechanical jack at a constant speed until the adjustable frame plate roadbed is lifted to a predetermined height, place the height-adjusting pad at a predetermined position at the bottom of the adjustable frame plate roadbed, and slowly release the jack;

[0011] S5. Restore the fixed connection between the fasteners and the adjustable frame plate ballast bed, and add a ditch cover above the central ditch.

[0012] As an optimization of the adjustable frame plate roadbed jacking method, in step S2, four mechanical jacks are selected and evenly placed at the four corners of the central ditch.

[0013] As an optimization of the jacking method of an adjustable frame plate roadbed, in step S3, the steps of inspecting the adjustable frame plate roadbed include: checking the bottom of the ditch and the limit position of the adjustable frame plate roadbed, observing whether there is concrete or other foreign matter blocking the frame plate from being jacked up, and cleaning the concrete or other foreign matter in time.

[0014] As an optimization of the jacking method of an adjustable frame plate track bed, in step S4, the step of shaking the mechanical jacks at a uniform speed includes shaking all the mechanical jacks synchronously until the adjustable frame plate track bed is lifted to a predetermined height.

[0015] As an optimization of the jacking method of an adjustable frame plate roadbed, in step S4, the step of shaking the mechanical jack at a uniform speed includes: first shaking the mechanical jack on one side of the center ditch to raise one side of the adjustable frame plate roadbed by a short stroke, and then shaking the mechanical jack on the other side of the center ditch to raise the other side of the adjustable frame plate roadbed by a short stroke, so that both sides of the adjustable frame plate roadbed are flush to the same height, and repeating the above steps until both sides of the adjustable frame plate roadbed are flush with the predetermined height.

[0016] As an optimization of the adjustable frame plate track bed jacking method, the short stroke includes at least 2mm, 3mm and 5mm.

[0017] As an optimization of the adjustable frame plate roadbed jacking method, the mechanical jack is a claw jack, and the tonnage range of the mechanical jack is 5-10 tons.

[0018] As an optimization of an adjustable frame plate track bed jacking method, the height-adjusting pad is made of polyethylene material, and the thickness of the height-adjusting pad includes at least 2mm, 3mm, 5mm, 25mm and 50mm.

[0019] Compared with the prior art, the beneficial effect of the present invention is that by using a small-tonnage mechanical jack instead of a hydraulic jack, not only is the equipment more portable and convenient for transportation between different sections, but the equipment can also be quickly installed and disassembled, thus reducing the time consumed, effectively reducing construction costs, improving construction efficiency, and facilitating shortening the construction period. DETAILED DESCRIPTION

[0020] To make the technical solutions and advantages of the present invention more clear, the present invention and its beneficial effects will be further described in detail below in conjunction with specific implementation methods, but the implementation methods of the present invention are not limited thereto.

[0021] The present application provides a method for lifting an adjustable frame plate track bed, which adopts the following technical solutions:

[0022] The jacking method includes the following steps:

[0023] S1. Remove the fixed connection between the fasteners and the adjustable frame plate track bed, and clear the debris in the central ditch of the adjustable frame plate track bed.

[0024] S2. Select an even number of mechanical jacks and place them on both sides of the central ditch so that the mechanical jacks on both sides of the central ditch are symmetrically distributed about the geometric center of the central ditch, thereby providing stable support for the adjustable frame plate roadbed; multiple workers operate multiple mechanical jacks one by one, and the workers press the rocker of the mechanical jack to slowly raise the mechanical jack. The top claw of each mechanical jack contacts the bottom of the adjustable frame plate roadbed and then stops until all the mechanical jacks contact the bottom of the adjustable frame plate roadbed.

[0025] Furthermore, the mechanical jack is a claw jack, and the tonnage range of the mechanical jack is 5-10 tons.

[0026] S3. Slowly shake the mechanical jack on one side of the center ditch alone and observe whether the adjustable frame plate roadbed is loose; if there is no looseness, stop shaking the mechanical jack and inspect the adjustable frame plate roadbed; if there is looseness, test the mechanical jack on the other side of the center ditch until all the mechanical jacks can loosen the adjustable frame plate roadbed.

[0027] S4. Shake the mechanical jack at a constant speed until the adjustable frame plate roadbed is lifted to a predetermined height, place the height-adjusting pad at the predetermined position at the bottom of the adjustable frame plate roadbed, and slowly release the jack.

[0028] Furthermore, the height-adjusting pad is made of polyethylene material, and the thickness of the height-adjusting pad includes at least 2mm, 3mm, 5mm, 25mm and 50mm, and height-adjusting pads of different thicknesses can be freely combined to meet the paving requirements of a predetermined height.

[0029] S5. Restore the fixed connection between the fasteners and the adjustable frame plate ballast bed, and add a ditch cover above the central ditch.

[0030] In a preferred embodiment of the present application, in step S2, four mechanical jacks are selected and evenly placed at the four corners of the central ditch, and four workers respectively operate the four mechanical jacks. Specifically, the installation position of the mechanical jacks is offset from the four corners of the central ditch to the center line to avoid collision between the mechanical jacks and the edge of the central ditch, so that the range of movement of the mechanical jacks is larger, making the operation more flexible and convenient.

[0031] In a preferred embodiment of the present application, in step S3, the step of inspecting the adjustable frame plate roadbed includes: checking the bottom of the ditch and the adjustable frame plate roadbed limit position to see if there is concrete or other foreign matter blocking the frame plate from being lifted, and promptly cleaning the concrete or other foreign matter. This step can be used to check for obstacles in the lifting process and avoid damage to the frame plate body due to forced lifting.

[0032] In a preferred embodiment of the present application, in step S4, the step of shaking the mechanical jack at a uniform speed includes but is not limited to the following two methods.

[0033] The first method includes synchronously shaking all mechanical jacks until the adjustable frame plate ballast is raised to a predetermined height.

[0034] The second method includes: first shaking the mechanical jack on one side of the central ditch to raise one side of the adjustable frame plate track bed by a short stroke, then shaking the mechanical jack on one side of the central ditch to raise the other side of the adjustable frame plate track bed by a short stroke, and the two sides of the adjustable frame plate track bed are flush to the same height, and repeating the above steps until both sides of the adjustable frame plate track bed are flush with the predetermined height. Further, the short stroke includes at least 2mm, 3mm and 5mm.

[0035] In actual production application, taking the predetermined height of 50mm required for jacking as an example, the following jacking method is implemented.

[0036] S1. Remove the fixed connection between the fasteners and the adjustable frame plate track bed, and clear the debris in the central ditch of the adjustable frame plate track bed.

[0037] S2. Select 4 mechanical jacks, which are 8-ton claw jacks, and place them on both sides of the central ditch respectively; 4 workers operate the 4 mechanical jacks one by one, and the workers press the rocker of the mechanical jack to slowly raise the mechanical jack. The top claw of each mechanical jack contacts the bottom of the adjustable frame plate roadbed and then stops until all the mechanical jacks contact the bottom of the adjustable frame plate roadbed.

[0038] S3. Slowly shake the two mechanical jacks on one side of the central ditch separately, with a lifting amount of 0.5mm, and observe whether the adjustable frame plate roadbed is loose; if there is no looseness, stop shaking the mechanical jacks and inspect the adjustable frame plate roadbed; if there is looseness, test the two mechanical jacks on the other side of the central ditch until all the mechanical jacks can loosen the adjustable frame plate roadbed.

[0039] S4. Shake the mechanical jack at a constant speed. The specific steps are as follows: first shake the mechanical jack on one side of the central ditch to raise one side of the adjustable frame plate roadbed by 5mm, then shake the mechanical jack on the other side of the central ditch to raise the other side of the adjustable frame plate roadbed by 5mm, and level the two sides of the adjustable frame plate roadbed to the same height. Repeat the above steps 10 times until both sides of the adjustable frame plate roadbed are level with the preset height of 50mm. Use a polyethylene height adjustment pad with a thickness of 50mm, place it under the adjustable frame plate roadbed, and slowly release the jack.

[0040] S5. Restore the fixed connection between the fasteners and the adjustable frame plate ballast bed, and add a ditch cover above the central ditch.

[0041] In practical application, the above method can complete the jacking operation of the adjustable frame plate roadbed within a 250m section within 48 hours. It is not only easy to carry but also has high jacking efficiency, which reduces construction costs, improves construction efficiency, and is conducive to shortening the construction period.

[0042] Experimental principle of the embodiment of the present application: Through the above method, a small-tonnage mechanical jack can be easily installed in the adjustable frame plate roadbed for support, and the lifting operation can be achieved by workers pressing. Compared with the traditional technical solution, it not only avoids the handling and loading and unloading of large equipment such as hydraulic jacks, but also reduces the time for laying oil pipes, greatly reduces the manpower and material costs, and is convenient and fast in construction and turnover, which greatly speeds up the construction speed, and can timely deal with the uneven settlement of the interval. This technical solution has been applied in many projects, has good economic and social benefits, and can better deal with the risk of roadbed displacement caused by regional uneven settlement.

[0043] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above embodiment. Therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by those skilled in the art on the basis of the present invention belongs to the protection scope of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A method for lifting an adjustable frame plate track bed, characterized in that: The following steps are involved: S1. Remove the fixed connection between the fasteners and the adjustable frame plate ballast and clear the debris in the central ditch of the adjustable frame plate ballast; S2. Use an even number of mechanical jacks and place them on both sides of the central ditch. Have multiple workers operate the mechanical jacks one by one and slowly raise them. The top claws of each mechanical jack will contact the bottom of the adjustable frame plate ballast and then stop until all mechanical jacks contact the bottom of the adjustable frame plate ballast. S3. Slowly shake the mechanical jack on one side of the central ditch alone and observe whether the adjustable frame plate roadbed is loose; if it is not loose, stop shaking the mechanical jack and inspect the adjustable frame plate roadbed; if it is loose, test the mechanical jack on the other side of the central ditch until all mechanical jacks can loosen the adjustable frame plate roadbed; S4. Shake the mechanical jack at a constant speed until the adjustable frame plate roadbed is lifted to a predetermined height, place the height-adjusting pad at a predetermined position at the bottom of the adjustable frame plate roadbed, and slowly release the jack; S5. Restore the fixed connection between the fasteners and the adjustable frame plate ballast bed, and add a ditch cover above the central ditch.

2. The adjustable frame plate track bed jacking method according to claim 1 is characterized in that: In step S2, four mechanical jacks are selected and evenly placed at the four corners of the central ditch.

3. The adjustable frame plate track bed jacking method according to claim 1 is characterized in that: In step S3, the steps of inspecting and repairing the adjustable frame plate roadbed include: checking the bottom of the ditch and the limit position of the adjustable frame plate roadbed, observing whether there is concrete or other foreign matter blocking the frame plate from being lifted, and cleaning the concrete or other foreign matter in time.

4. The adjustable frame plate track bed jacking method according to claim 1 is characterized in that: In step S4, the step of shaking the mechanical jacks at a uniform speed includes shaking all the mechanical jacks synchronously until the adjustable frame plate roadbed is lifted to a predetermined height.

5. The adjustable frame plate track bed jacking method according to claim 1 is characterized in that: In step S4, the step of shaking the mechanical jack at a uniform speed includes: first shaking the mechanical jack on one side of the central ditch to raise one side of the adjustable frame plate roadbed by a short stroke, and then shaking the mechanical jack on the other side of the central ditch to raise the other side of the adjustable frame plate roadbed by a short stroke, so that both sides of the adjustable frame plate roadbed are flush to the same height, and repeating the above steps until both sides of the adjustable frame plate roadbed are flush with the predetermined height.

6. The adjustable frame plate track bed jacking method according to claim 5, characterized in that: The short strokes include at least 2mm, 3mm and 5mm.

7. The adjustable frame plate track bed jacking method according to claim 1, characterized in that: The mechanical jack is a claw type jack, and the tonnage range of the mechanical jack is 5-10 tons.

8. The adjustable frame plate track bed jacking method according to claim 1, characterized in that: The height adjustment pad is made of polyethylene material, and the thickness of the height adjustment pad includes at least 2mm, 3mm, 5mm, 25mm and 50mm.