A leveling control method for reusing slideway beams and slideway plates

Abstract

The present invention discloses a leveling control method for a slide plate of a reused slide beam, which relates to the technical field of bridge construction and solves the problem that it is difficult to level the existing reused slide plates in a confined space. The method comprises the following steps: finding a reference point for padding the slide plate after the high-strength bolts and welding construction of the slide beam interface are completed; padding; pre-pressing the slide plate with a pre-stressing device after padding to meet the requirements; completing padding of all slide plates of the girder; after completing measurement and verification of the slide plates of the single girder, symmetrically welding the slide plate interface welds and the welds on both sides of the slide plate from the middle to both ends, cutting off the lifting ears and limit blocks on both sides of the slide plate, and grinding the welding slag on the surface of the slide plate and the slide beam; the present invention transports, adjusts, measures, pads, pre-stresses and welds the slide plates of the reused slide beam through a slide plate lifting and transporting trolley, a pre-stressing device and elevation control to achieve the purpose of accurately leveling the slide plate. The method has the advantages of simple structure, convenient manufacturing, good applicability and easy operation.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more specifically to the technical field of leveling of reused slide plates. Background Art

[0002] Incremental launching construction refers to a construction method in which the beam body is cast or assembled section by section on the embankment behind the abutment, and longitudinally pushed by a jacking device, so that the beam body is in place through the temporary sliding devices at the top of each pier. The working principle of incremental launching construction can be described by three main links of cyclic operation, that is, casting or assembling concrete beam sections on the fixed site behind the abutment, tensioning permanent and temporary prestressed steel bars, and pushing the beam body forward section by section with the jacking device arranged at the bottom of the beam on the abutment or support close to the pre-site of the beam section and the sliding devices arranged on each pier bearing or temporary pier.

[0003] In order to maximize the utilization of resources, most of the slide beams required for incremental launching construction use reused materials. Due to the repeated use, transportation and poor storage of the turnover materials, after the slide beam is installed, the height difference between single girders of the slide plate is large and the flatness is poor. Considering that during the incremental launching of large bridges, due to the large weight of the steel beam, it is difficult to control the height difference of the three girders and the safety risk is high. To meet the requirements of incremental launching construction, it is necessary to accurately pad and level the reused slide plate to ensure the smooth and safe progress of incremental launching construction.

[0004] In the prior art, after the reused slide beam is installed, the height difference of the slide plate is large and cannot meet the construction conditions. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problem that it is difficult to level the reused slide plate in a restricted space when the height difference of the slide plate is large and cannot meet the construction conditions after the reused slide beam is installed. The present invention provides a leveling control method for the slide plate of a reused slide beam.

[0006] The present invention specifically adopts the following technical solutions to achieve the above purpose: A leveling control method for the slide plate of a reused slide beam, comprising the following steps:

[0007] Step 1: After the high-strength bolts and welding construction of the slide beam docking interface are completed, arrange a measuring point every 2 meters on both sides of each slide plate, number the measuring points, set up a level at point b, take the front view as point a, and the rear view as each measuring point of the slide plate, and measure and record the values of each point of the single-girder slide plate as A1, A2, A3......, where 1, 2, 3... represent the numbers of each measuring point, find the highest point Amax of the slide plate, and use the highest point Amax as the benchmark point for padding the slide plate;

[0008] Step 2. After finding the reference point of the slideway plate pad in step 1, weld the steel bar head to a measuring point A' at the same elevation as the pad reference point at point a. In subsequent measurements, if the front sight A' reading is greater than the back sight reading (the steel bar head is welded to the measuring point A' at the same elevation as the pad reference point, A' is used as the front sight, and the slideway plate measuring point is used as the back sight, which facilitates the direct determination of the slideway plate pad height by comparing the front and back sight readings), then when padding the point with the back sight, the slideway plate elevation needs to be lowered by the absolute value of the difference between the front sight reading and the back sight reading; if the front sight A' reading is less than the back sight reading, then when padding the point with the back sight, the slideway plate elevation needs to be raised by the absolute value of the difference between the front sight reading and the back sight reading; if the front sight A' reading is equal to the back sight reading, then the slideway plate does not need to be padded (solving the pad definition problem);

[0009] Step 3: Weld four first lifting ears symmetrically on both sides of the slide plate (to facilitate lifting and transportation), and weld limit blocks every 4 meters on the top plates of the slide beams on both sides of the slide plate (to prevent the slide plate from moving in the transverse direction during adjustment) (the first lifting ears welded on both sides of the slide plate correspond to the positions of the second lifting ears of the lifting and transportation trolley and are arranged symmetrically; the limit blocks welded on both sides of the slide plate are close to the slide plate and are evenly and symmetrically arranged);

[0010] Step 4: Lift and transport the slide plate, move it to the tail of the previous slide plate, lower the slide plate, and complete the docking of the slide plates (the movement of the slide plate and the fixation of the lifting and transport trolley rely on brake-type mechanical directional wheels);

[0011] Step 5: Measure each measuring point of the connected single slideway board. During measurement, the front is regarded as A' and the back is regarded as each measuring point. Calculate the slideway board pad height at each point according to the method in step 2 (write the pad height of each point of the slideway board at the measuring point position with a stone pencil);

[0012] Step 6: Cut out the steel plates of different thicknesses according to the pad height, and carry out the first padding according to the principle of large plates first, small plates later, thick plates first, thin plates later;

[0013] Step 7. After the first padding is completed, measure the lower slide plate again at each measuring point according to step 5. If the measurement result does not meet the requirements, perform padding again according to steps 5 and 6 until it meets the requirements (padding should be performed in layers);

[0014] Step 8: After the padding meets the requirements, use a pre-pressing device to pre-press the slide plate for 12-24 hours;

[0015] Step 9: After preloading, measure the slide plate again according to step 5. If the measurement result meets the requirements, remove the preloading device and proceed to the next slide plate. If the measurement result does not meet the requirements, follow steps 5 to 9 until it meets the requirements (re-measure the overall height difference of the single-truss slide plate to ensure that the slide plate ensures the padding is dense, improves the padding accuracy, and ensures that the flatness meets the requirements).

[0016] Step 10: Complete the shimming of all slideway plates of this girder according to Steps 3 to 9.

[0017] Step 11: After completing the shimming of all slideway plates of this girder, conduct measurement review on the measuring points of all slideway plates of this girder. If the measurement results do not meet the requirements, operate according to Steps 5 to 9 until the requirements are met.

[0018] Step 12: After completing the measurement review of the slideway plates of a single girder, symmetrically weld the butt welds of the slideway plates and the welds on both sides of the slideway plates from the middle to both ends (ensure no excessive deformation during welding), cut off the lifting lugs and limit blocks on both sides of the slideway plates, and grind the welding slag on the surfaces of the slideway plates and slideway girders.

[0019] In the technical solution of this application: After the high-strength bolts and welding construction of the docking joints of the slideway beams are completed, when making shims: The height difference between the front and rear of the same slideway beam shall not be greater than 5 mm, the height difference between the top surfaces of the slideway beams of different trusses at the same cross-section shall be within 2 mm, and the middle truss shall not be higher than the side trusses, so as to avoid large forces on the supports caused by inconsistent elevations of the slideway beams and inconsistent dragging speeds of the three trusses, resulting in lateral deviation of the steel beam or the slider becoming disengaged during dragging; After the slideway plates are shimmed, the height difference of a single truss shall not be greater than 5 mm; After the sliders are shimmed, the height difference of the three trusses shall not be greater than 2 mm; And the middle truss shall not be higher than the side trusses. Uneven-thickness steel plates are used for layered shimming. First, thick steel plates are used for rough adjustment according to the measurement data, and then thin steel plates are used for fine adjustment while measuring, until the requirements are met, and then preloading measurement is carried out. First thick plates and then thin plates, first large plates and then small plates, first rough adjustment and then fine adjustment, the shimming is dense and there is no hollow phenomenon. After the welds are removed, the slideway plates are moved as a whole, the docking joints of the original slideway plates are ground flat and cleaned, and the moved interfaces need to be leveled and ground, and the slag is cleaned; The docking joints are welded with full penetration welding. After welding, the top surface of the weld is ground flat, and it is required that the composite steel plates on both sides of the weld are on the same plane. Intermittent welding (intermittent spacing of 200 mm) is used on both sides of the slideway plates, the weld form is fillet weld, and the leg height of the weld is greater than 10 mm; After the preloading measurement is completed, spot welding is carried out for fixation. After the three-truss shimming is completed, measurement verification is carried out, and then unified welding is carried out. During measurement, the height difference of a single truss is less than 5 mm, the height difference of the same cross-section is less than 2 mm, and the middle truss is 3 mm lower than the side trusses; The elevation of the middle truss is +30.785, and the elevation of the side trusses is +30.788; Two measurement axes are arranged along the slideway plates for each truss of the slideway beam, and one measurement axis is arranged every 1.5 m along the bridge direction; Before construction, the measuring points in the measurement control network are measured to find the shimming reference points; The reference points are fixed in a reliable position and marked, and each shimming is carried out based on this point. Before each measurement, first level the level and read the value of the measurement reference point (if it is 1.00 m); Then read the value of the top surface of the slideway plate (if the value is greater than 1.00 m, the corresponding difference needs to be shimmed continuously); In the principle of first thick plates and then thin plates, adjust while measuring. After measurement, write the shimming value on the slideway plate surface with a stone pen (for easy comparison) until the requirements are met. Through the lifting and transportation trolley of the slideway plate, the preloading device and elevation control, the slideway plates of the recycled slideway beams are transported, adjusted, measured, shimmed, preloaded and welded to achieve the purpose of precise leveling of the slideway plates, which has the advantages of simple structure, convenient manufacturing, good applicability, simple operation, etc., and effectively solves the technical problem of great difficulty in leveling the recycled slideway plates in a limited space when the relative height difference of the slideway plates is large and the construction conditions cannot be met after the installation of the recycled slideway beams.

[0020] In this application, the shimming steel plates: 2, 5, 6, 8, 10, 16, 20, 24 mm uneven-thickness steel plates are cut according to the on-site measurement data; After cutting, the cutting edges are ground to prevent the shimming from being not dense.

[0021] Further, in step 3, the old welds on both sides of the slideway plate are planed and polished flat.

[0022] Further, in step 4, use the lifting and transporting trolley to transport the slideway plate and move it to the tail of the previous slideway plate. Fix the lifting and transporting trolley and the chain block on the lifting and transporting trolley. Before lowering the slideway plate, polish and clean the bottom of the slideway plate, the top surface of the slideway beam, and the docking interfaces of the two slideway plates.

[0023] Further, the lifting and transporting trolley includes two horizontally and symmetrically arranged gantry supports. A cross beam is horizontally arranged in the middle of the upper parts of the two gantry supports. A support base parallel to the cross beam is arranged at the bottom of each gantry support. At least two braking mechanical directional wheels are arranged at the lower part of each support base. Second lifting lugs are arranged on both sides of the bottom of the cross beam between the two gantry supports (the structure of the lifting and transporting trolley is symmetric, and its central axis is consistent with the central axis of the slideway plate).

[0024] Furthermore, an inverted V-shaped first support is arranged in the middle of the bottom of the cross bar of each gantry support, and the bottom end of the inverted V-shaped first support is fixed inside the vertical bar of the gantry support.

[0025] Furthermore, an inverted V-shaped second support is arranged on each support base, and the top end of each inverted V-shaped second support is fixed on the vertical bar of the gantry support.

[0026] Furthermore, the materials of the first support and the second support are both angle steel.

[0027] Furthermore, the material of the cross beam is square steel pipe; the materials of the gantry support and the support base are both channel steel.

[0028] Furthermore, a chain block is connected to each second lifting lug (the chain block is connected to the lifted object through a steel wire rope below. The second lifting lug, the chain block, and the lifting point of the lifted object are on the same straight line, and the two chain blocks are synchronized during lifting and lowering).

[0029] Furthermore, the cross beam, the gantry support, the support base, the first support, the second support, the second lifting lug, and the braking mechanical directional wheel are connected by welding (use the steel wire rope installed on the chain block to lift the steel member. After the member is lifted, release the brake of the braking mechanical directional wheel and push the tooling to transport the member).

[0030] Furthermore, the preloading device includes a portal steel plate welded to the top plate of the slideway beam. A jack is arranged on the inner side of the upper part of the portal steel plate. A longitudinal first square steel pipe is arranged below the jack. A transverse second square steel pipe is arranged below the first square steel pipe below the jack (the jack uniformly applies pressure synchronously and transfers it to the top surface of the slideway plate; preloading is carried out using the jack, and the values before and after preloading are compared. If the values are different, adjustments are made again).

[0031] Furthermore, in step 9, after the preloading is completed and the jack is in the unloaded state, the slideway plate is measured again according to step 5. The jack cannot be unloaded during the measurement until the construction meets the requirements, and then the jack can be unloaded synchronously.

[0032] Furthermore, in step 1, point b where the level is set up and the foresight point a are arbitrarily selected, and each measuring point on the slideway plate is evenly and symmetrically arranged on the slideway plate.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1. Through the hoisting and transportation trolley for the slideway plate, the preloading device and elevation control, the recycled slideway beam slideway plate is transported, adjusted, measured, shimmed, preloaded and welded to achieve the purpose of precise leveling of the slideway plate;

[0035] 2. The hoisting and transportation trolley and the preloading device have simple structures and are easy to manufacture;

[0036] 3. The hoisting and transportation trolley for the slideway plate and the preloading device have simple structures and are easy to calculate. The materials used can be changed according to the site needs to enhance safety; after hoisting with a reasonably sized chain block, shimming is carried out, which greatly enhances the construction safety; after leveling, multiple negative measurements and preloading remeasurements are carried out to ensure the construction quality of the slideway plate leveling and guarantee the safety of the steel beam jacking construction;

[0037] 4. The leveling control method of the present application requires fewer tools, has a simple structure, is material - economical, requires less labor input, simplifies the construction process compared with the traditional construction method, reduces costs while ensuring the construction quality and shortening the construction period;

[0038] 5. The hoisting and transportation trolley for the slideway plate provides a simple and economical device for hoisting and transporting components in special positions. This method provides a simple and fast construction method for the construction of similar projects, showing excellent technical advantages and good economy, and having good prospects for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is the elevation view of the leveling of the recycled slideway beam slideway plate of the present invention;

[0040] Figure 2 is the side view of the leveling of the recycled slideway beam slideway plate of the present invention;

[0041] Figure 3 It is the elevation view of the hoisting and transporting trolley for the slideway plate of the present invention;

[0042] Figure 4 It is the side view of the hoisting and transporting trolley for the slideway plate of the present invention;

[0043] Figure 5 It is the plan layout drawing of the leveling measurement points for the reused slideway beam and slideway plate of the present invention;

[0044] Figure 6 It is the plan view of the preloading of the slideway plate of the present invention;

[0045] Figure 7 It is the side view of the preloading of the slideway plate of the present invention.

[0046] Reference numerals: 1 - slideway beam, 2 - slideway plate, 3 - hoisting and transporting trolley, 4 - cross beam, 5 - gantry support frame, 6a - first support frame, 6b - second support frame, 7a - first lifting lug, 7b - second lifting lug, 8 - braking mechanical directional wheel, 9 - chain block, 10 - limit stop block, 11 - gantry steel plate, 12 - jack, 13 - first square steel pipe, 14 - second square steel pipe. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] Embodiment 1

[0050] As Figures 1 to 7 shown, this embodiment provides a leveling control method for reused slideway beam and slideway plate, including the following steps:

[0051] Step 1: After the high-strength bolts and welding construction of the docking joint of the slideway beam 1 are completed, arrange a measurement point every 2 meters on both sides of each slideway plate 2, and number the measurement points. Set up a level at point b, with the foresight at point a and the backsight at each measurement point of the slideway plate 2. Overall measure the values of 2 points of the single-truss slideway plate and record them as A1, A2, A3......, where 1, 2, 3... represent the numbers of each measurement point. Find the highest point Amax of the slideway plate 2, and use the highest point Amax as the benchmark point for leveling the slideway plate 2;

[0052] Step 2: After finding the reference points for leveling the slideway plate 2 in Step 1, weld a steel bar head at point a to measure point A' at the same elevation as the reference point for leveling. In subsequent measurements, if the reading of the foresight at A' is greater than the reading of the backsight (the welded steel bar head at the same elevation as the reference point for leveling is used as the foresight, and the measuring point on the slideway plate 2 is used as the backsight, which facilitates directly determining the leveling height of the slideway plate 2 by comparing the readings of the foresight and backsight), then when leveling the backsight at this point, the elevation of the slideway plate 2 needs to be reduced by the absolute value of the difference between the foresight reading and the backsight reading; if the reading of the foresight at A' is less than the reading of the backsight, then when leveling the backsight at this point, the elevation of the slideway plate 2 needs to be increased by the absolute value of the difference between the foresight reading and the backsight reading; if the reading of the foresight at A' is equal to the reading of the backsight, then the slideway plate 2 does not need to be leveled (solving the problem of leveling definition);

[0053] Step 3: Symmetrically weld 4 first lifting lugs 7a on both sides of the slideway plate 2 (for convenient lifting and transportation), and weld limit blocks 10 on the top plates of the slideway beams 1 on both sides of the slideway plate 2 every 4 meters (to prevent the transverse position of the slideway plate 2 from moving during adjustment) (the first lifting lugs 7a welded on both sides of the slideway plate 2 correspond to and are symmetrically arranged with the second lifting lugs 7b of the lifting and transportation trolley 3; the limit blocks 10 welded on both sides of the slideway plate 2 are close to the slideway plate 2 and are evenly and symmetrically arranged);

[0054] Step 4: Lift and transport the slideway plate 2, move it to the tail of the previous slideway plate 2, and lower the slideway plate 2 to complete the docking of the slideway plate 2 (the movement of the slideway plate 2 and the fixation of the lifting and transportation trolley 3 rely on the braking mechanical directional wheels 8);

[0055] Step 5: Measure each measuring point of the single slideway plate 2 after docking. When measuring, the foresight is A', and the backsight is each measuring point. Calculate the leveling height of each point of the slideway plate 2 according to the method in Step 2 (write the leveling height of each point of the slideway plate 2 at the position of the measuring point with a stone pen);

[0056] Step 6: Cut the unequal-thickness leveling steel plates according to the leveling height, and perform the first leveling according to the principle of first large plates and then small plates, first thick plates and then thin plates;

[0057] Step 7: After the first leveling is completed, lower the slideway plate 2, and measure each measuring point of the slideway plate 2 again according to Step 5. If the measurement result does not meet the requirements, perform the second leveling according to Steps 5 and 6 until it meets the requirements (layered leveling should be carried out during leveling);

[0058] Step 8: After leveling to meet the requirements, pre-press the slideway plate 2 with a pre-pressing device for 12 - 24 hours;

[0059] Step 9: After the pre-pressing is completed, measure the slide plate 2 again according to step 5. If the measurement result meets the requirements, remove the pre-pressing device and proceed to the next slide plate 2. If the measurement result does not meet the requirements, follow steps 5 to 9 until it meets the requirements (re-measure the overall height difference of the single-truss slide plate 2 to ensure that the slide plate 2 ensures the padding is dense, improves the padding accuracy, and ensures that the flatness meets the requirements).

[0060] Step 10: Complete the padding of all slide plates 2 of this truss according to steps 3 to 9;

[0061] Step 11: After completing the padding of all slide plates 2 of this truss, measure and verify all the measuring points of the slide plates 2 of this truss. If the measurement results do not meet the requirements, follow steps 5 to 9 until they meet the requirements.

[0062] Step 12: After completing the measurement and verification of the single-truss slideway plate 2, symmetrically weld the slideway plate 2 interface welds and the welds on both sides of the slideway plate 2 from the middle to both ends (ensure there is no excessive deformation during welding), cut off the lugs and limit blocks 10 on both sides of the slideway plate 2, and grind the welding slag on the surface of the slideway plate 2 and the slideway beam 1.

[0063] In the technical solution of this application: After the high-strength bolts and welding construction of the docking joints of the slideway beams 1 are completed, during shimming: The height difference between the front and rear of the same slideway beam 1 shall not be greater than 5 mm, the height difference between the top surfaces of different truss slideway beams 1 at the same cross-section shall be within 2 mm, and the middle truss shall not be higher than the side trusses, so as to avoid large forces on the supports caused by inconsistent elevations of the slideway beams 1 and inconsistent towing speeds of the three trusses, resulting in lateral displacement of the steel beam or the slider becoming disengaged during towing; After shimming the slideway plates 2, the height difference of a single truss shall not be greater than 5 mm; After shimming the sliders, the height difference of the three trusses shall not be greater than 2 mm; And the middle truss shall not be higher than the side trusses. Use steel plates of unequal thickness for layered shimming. First, shim and roughly adjust with thick steel plates according to the measurement data, and then use thin steel plates to measure and adjust while measuring for fine adjustment. After meeting the requirements, conduct preloading measurement. First thick plates and then thin plates, first large plates and then small plates, first rough adjustment and then fine adjustment, shim tightly without hollowing phenomenon. After the welds are removed by gouging, move the slideway plates 2 as a whole, grind and level the butt joints of the original slideway plates 2, clean them up, level and grind the moved interfaces, and clean up the carbon slag; The butt joints are welded by full penetration welding. After welding is completed, grind the top surface of the welds so that the composite steel plates on both sides of the welds are on the same plane. The two sides of the slideway plates 2 are welded intermittently (the intermittent spacing is 200 mm), the weld form is fillet weld, and the weld leg height is greater than 10 mm; After the preloading measurement is completed, spot welding is carried out for fixation. After the three-truss shimming is completed, measurement verification is carried out, and then unified welding is carried out. During measurement, the height difference of a single truss is less than 5 mm, the height difference of the same cross-section is less than 2 mm, and the middle truss is 3 mm lower than the side trusses; The elevation of the middle truss is +30.785, and the elevation of the side trusses is +30.788; Two measurement axes are arranged along the slideway plates 2 for each truss slideway beam 1, and one measurement axis is arranged every 1.5 m along the bridge direction; Before construction, measure the measuring points in the measurement control network to find the shimming reference points; Fix the reference points at a firm position and make marks. Each shimming is carried out based on this point. Before each measurement, level the level first, read the value of the measurement reference point (if it is 1.00 m); Then read the value of the top surface of the slideway plate 2 (if the value is greater than 1.00 m, the corresponding difference needs to be shimmed continuously); According to the principle of first thick plates and then thin plates, measure and adjust while measuring. After measurement, write the shimming value on the surface of the slideway plate 2 with a stone pen (for easy comparison) until the requirements are met. Through the hoisting and transportation trolley 3 of the slideway plate 2, the preloading device and elevation control, the used slideway beams 1 and slideway plates 2 are transported, adjusted, measured, shimmed, preloaded and welded to achieve the purpose of accurately leveling the slideway plates 2, which has the advantages of simple structure, convenient manufacturing, good applicability, simple operation, etc., and effectively solves the technical problem of great difficulty in leveling the used slideway plates 2 in a limited space when the relative height difference of the slideway plates 2 is large and cannot meet the construction conditions after the installation of the used slideway beams 1.

[0064] Shimming steel plates: Steel plates of unequal thickness of 2, 5, 6, 8, 10, 16, 20, 24 mm are cut according to the on-site measurement data; After cutting, grind the cutting edges to prevent uneven shimming.

[0065] Example 2

[0066] Based on Examples 1, 2, 3 and 5, as Figure 1 shown, in step 3, the old welds on both sides of the slideway plate 2 are planed and polished flat; in step 4, the slideway plate 2 is transported by the hoisting and transporting trolley 3 and moved to the tail of the previous slideway plate 2, and the hoisting and transporting trolley 3 and the chain block 9 on the hoisting and transporting trolley 3 are fixed; before lowering the slideway plate 2, the bottom of the slideway plate 2, the top surface of the slideway beam 1 and the butting joints of the two slideway plates 2 are polished and cleaned.

[0067] Example 3

[0068] Based on Example 1, as Figures 1-5 shown, the hoisting and transporting trolley 3 includes two horizontally and symmetrically arranged gantry supports 5. A cross beam 4 is horizontally arranged in the middle of the upper parts of the two gantry supports 5. A support base parallel to the cross beam 4 is arranged at the bottom of each gantry support 5. At least two braking mechanical directional wheels 8 are arranged at the lower part of each support base. Second lifting lugs 7b are arranged on both sides of the bottom of the cross beam 4 between the two gantry supports 5 (the structure of the hoisting and transporting trolley 3 is symmetric, and its central axis is consistent with the central axis of the slideway plate 2); an inverted V-shaped first support frame 6a is arranged in the middle of the bottom of the cross bar of each gantry support 5, and the bottom end of the inverted V-shaped first support frame 6a is fixed inside the vertical bar of the gantry support 5; an inverted V-shaped second support frame 6b is arranged on each support base, and the top end of each inverted V-shaped second support frame 6b is fixed on the vertical bar of the gantry support 5; the materials of the first support frame 6a and the second support frame 6b are both angle steel; the material of the cross beam 4 is square steel pipe; the materials of the gantry support 5 and the support base are both channel steel; a chain block 9 is connected to each second lifting lug 7b (the chain block 9 is connected to the lifted object through a steel wire rope below, the second lifting lug 7b, the chain block 9 and the lifting point of the lifted object are on the same straight line, and the two chain blocks 9 are synchronized during hoisting and lowering); the cross beam 4, the gantry support 5, the support base, the first support frame 6a, the second support frame 6b, the second lifting lug 7b and the braking mechanical directional wheel 8 are connected by welding (the steel members are hoisted by using the steel wire rope installed on the chain block 9. After the members are hoisted, the brakes of the braking mechanical directional wheels 8 are released, and the tooling is pushed to transport the members).

[0069] Example 4

[0070] Based on Example 1, as Figure 7As shown in the figure, the preloading device includes a portal steel plate 11 welded to the top plate of the slideway beam 1. Inside the upper part of the portal steel plate 11, a jack 12 is provided. Below the jack 12, a longitudinal first square steel pipe 13 is provided. Below the first square steel pipe 13 under the jack 12, a transverse second square steel pipe 14 is provided (the jack 12 applies pressure synchronously and evenly to transfer it to the top surface of the slideway plate 2; the preloading is carried out by using the jack 12, and the values before and after preloading are compared. If the values are different, adjustments are made again).

[0071] Example 5

[0072] Based on Example 1, as Figure 7 shown in the figure, in step 9, after the preloading is completed and the jack 12 is in the unloaded state, the slideway plate 2 is measured again according to step 5. During the measurement, the jack 12 cannot be unloaded until the construction meets the requirements, and then the jack 12 can be unloaded synchronously.

[0073] Example 6

[0074] Based on Example 1, as Figure 5 and 6 shown in the figure, in step 1, the b point where the level is set up and the foresight point a are arbitrarily selected, and each measuring point on the slideway plate 2 is evenly and symmetrically arranged on the slideway plate 2.

Claims

1. A leveling control method for reusing slideway beams and slideway plates, characterized in that, It includes the following steps: Step 1: After the high-strength bolts and welding construction of the docking joints of the slideway beams (1) are completed, arrange a measuring point every 2 meters on both sides of each slideway plate (2), number the measuring points, set up a level at point b, take the front sight as point a, and the back sight as each measuring point of the slideway plate (2). Measure the values of each point of the single-truss slideway plate (2) as a whole and record them as A1, A2, A3......, where 1, 2, 3... represent the numbers of each measuring point. Find the highest point Amax of the slideway plate (2), and use the highest point Amax as the benchmark point for leveling the slideway plate (2). Step 2: After finding the benchmark point for leveling the slideway plate (2) in Step 1, weld a steel bar head at point a at the same elevation as the benchmark point for leveling. If the front sight reading of A' is greater than the back sight reading during subsequent measurements, when leveling the back sight at this point, the elevation of the slideway plate (2) needs to be reduced by the absolute value of the difference between the front sight reading and the back sight reading; if the front sight reading of A' is less than the back sight reading, when leveling the back sight at this point, the elevation of the slideway plate (2) needs to be increased by the absolute value of the difference between the front sight reading and the back sight reading; if the front sight reading of A' is equal to the back sight reading, the slideway plate (2) does not need to be leveled. Step 3: Weld 4 first lifting lugs (7a) symmetrically on both sides of the slideway plate (2), and weld limit blocks (10) on the top plates of the slideway beams (1) on both sides of the slideway plate (2) every 4 meters. Step 4: Lift and transport the slideway plate (2), move it to the tail of the previous slideway plate (2), and lower the slideway plate (2) to complete the docking of the slideway plates (2). Step 5: Measure each measuring point of the single docked slideway plate (2). When measuring, take the front sight as A', and the back sight as each measuring point, and calculate the leveling height of each point of the slideway plate (2) according to the method in Step 2. ​ ​ ​ ​ ​ ​ ​ 2. The leveling control method of the recycled slideway beam slide plate according to claim 1, characterized in that, In step 4, use the hoisting and transporting trolley (3) to transport the slideway plate (2) and move it to the tail of the previous slideway plate (2). Fix the hoisting and transporting trolley (3) and the chain block (9) on the hoisting and transporting trolley (3). Before lowering the slideway plate (2), clean the bottom of the slideway plate (2), the top surface of the slideway beam (1), and the docking joints of the two slideway plates (2) by grinding.

3. The leveling control method of the recycled slideway beam slide plate according to claim 2, characterized in that The hoisting and transporting trolley (3) includes two horizontally and symmetrically arranged gantry supports (5). A cross beam (4) is horizontally arranged in the middle of the upper parts of the two gantry supports (5). A support base parallel to the cross beam (4) is arranged at the bottom of each gantry support (5). At least two braking mechanical directional wheels (8) are arranged at the lower part of each support base. Second lifting lugs (7b) are arranged on both sides of the bottom of the cross beam (4) between the two gantry supports (5).

4. The leveling control method of the reused slideway beam slide plate according to claim 3, characterized in that, An inverted V-shaped first support frame (6a) is arranged in the middle of the bottom of the cross bar of each gantry support (5), and the bottom end of the inverted V-shaped first support frame (6a) is fixed inside the vertical bar of the gantry support (5).

5. A leveling control method for a reused slideway beam slide plate according to claim 4, characterized in that, An inverted V-shaped second support frame (6b) is arranged on each support base, and the top end of each inverted V-shaped second support frame (6b) is fixed on the vertical bar of the gantry support (5).

6. A leveling control method for a reused slideway beam slide plate according to claim 3, characterized in that A chain block (9) is connected to each second lifting lug (7b).

7. A leveling control method for the reused slideway plate of a slideway beam according to claim 5, characterized in that, The cross beam (4), the gantry support (5), the support base, the first support frame (6a), the second support frame (6b), the second lifting lug (7b), and the braking mechanical directional wheel (8) are connected by welding.

8. A leveling control method for a reused slideway beam slide plate according to claim 1, characterized in that, The preloading device includes a gantry steel plate (11) welded to the top plate of the slideway beam (1). A jack (12) is arranged inside the upper part of the gantry steel plate (11). A longitudinal first square steel pipe (13) is arranged below the jack (12). A transverse second square steel pipe (14) is arranged at the lower part of the first square steel pipe (13) below the jack (12).

9. The leveling control method of the recycled slideway beam slide plate according to claim 8, characterized in that In step 9, after the preloading is completed and the jack (12) is in the unloaded state, measure the slideway plate (2) again according to step 5. During the measurement, the jack (12) cannot be unloaded until the construction meets the requirements, and then the jack (12) can be unloaded synchronously.

10. The leveling control method of the recycled slideway beam slide plate according to claim 1, characterized in that, In step 1, point b where the level is set up and the foresight point a are arbitrarily selected, and the measuring points of the slideway plate (2) are evenly and symmetrically arranged on the slideway plate (2).

Images