Method for installing high-speed maglev track slab and structural beam

Abstract

The present application belongs to the technical field of manufacturing of magnetic levitation track, and discloses a mounting method for connecting high-speed magnetic levitation track plate and structure beam, comprising: S1, establishing a theoretical model of the magnetic levitation track to obtain a theoretical coordinate; S2, establishing a measurement control network; S3, installing the structure beam according to the theoretical coordinate and the measurement control network; S4, initially positioning the track plate on the structure beam; S5, measuring a first actual coordinate of the track plate; S6, comparing the first actual coordinate with the theoretical coordinate to obtain an adjustment correction amount; S7, adjusting the position of the track plate according to the adjustment correction amount; S8, re-measuring the track plate to obtain a re-measurement result, if the re-measurement result is qualified, then S9 is performed, if not, then return to S7; S9, fastening the track plate and the structure beam; S10, grouting to connect the track plate and the structure beam. Through multiple adjustments, the precision requirement of installing the track plate to the structure beam is met, and the deviation generated in the construction process is eliminated.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation track manufacturing technology, and in particular to an installation method for connecting high-speed magnetic levitation track slabs to structural beams. Background Technology

[0002] Maglev trains, currently the fastest land-based mode of transportation, offer customers numerous conveniences due to their advantages such as large load capacity, high speed, high safety, and comfortable experience.

[0003] The construction method for maglev track structures involves the prefabrication of the track slab and structural beam structures as a whole. This prefabrication method results in large individual weights (each track slab + structural beam weighs over 50 tons), leading to high manufacturing costs and low prefabrication efficiency. Furthermore, after prefabrication, the entire structure needs to be transported to the installation site for installation. This not only incurs high transportation costs but also causes track slab deformation due to bumps during transport, affecting its accuracy. On-site installation requires secondary fine-tuning, which is time-consuming, labor-intensive, and results in a high rework rate.

[0004] Therefore, a method can be adopted to prefabricate the track slab and structural beams (or structural columns) separately and then assemble them as a whole. Since the structural beams do not have functional components and their precision requirements are low, they can be prefabricated on site. After the track slabs are manufactured, they can be transported to the site for installation with the structural beams, thereby reducing transportation costs. The installation of the track slabs to the structural beams needs to ensure installation accuracy. The positioning accuracy of the track slabs directly affects the operating speed of the maglev train. In order to meet the overall accuracy of the maglev track line, the installation of the track slabs must eliminate the deviations generated during the construction process and ultimately meet the positioning accuracy requirements of the high-speed operation line of the maglev train. Currently, there is a lack of a method for installing structural beams and track slabs to ensure the overall track accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an installation method for connecting a high-speed maglev track slab to a structural beam, which uses a step-by-step correction method to meet installation accuracy requirements.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The installation method for connecting the high-speed maglev track slab to the structural beam includes:

[0008] S1. Establish a theoretical model of the entire maglev track and obtain the theoretical coordinates of the maglev track;

[0009] S2. Establish a measurement control network;

[0010] S3. Install the structural beam according to the theoretical coordinates and the measurement control network;

[0011] S4, installing the track slab on the structure beam according to the theoretical coordinates and the measurement control network;

[0012] S5, measuring the first actual coordinates of the track slab;

[0013] S6, comparing the first actual coordinates with the theoretical coordinates to obtain an adjustment correction;

[0014] S7, adjusting the position of the track slab according to the adjustment correction;

[0015] S8, re-measuring the track slab to obtain a re-measurement result, if the re-measurement result is qualified, then S9 is performed; if not, then return to S7;

[0016] S9, fastening the track slab and the structure beam;

[0017] S10, grouting the track slab and the structure beam.

[0018] Preferably, the measurement control network is a CPIII measurement control network, the CPIII measurement control network is a foundation pile control network, and the control points of the CPIII measurement control network are arranged on both sides along the preset extension direction of the maglev track, and the distance between two adjacent control points on the same side of the maglev track is 50-70m.

[0019] Preferably, the S4 step comprises:

[0020] S41, performing a basic re-measurement on the track slab;

[0021] S42, turning over the track slab;

[0022] S43, installing an adjuster on the structure beam;

[0023] S44, hoisting the turned-over track slab to the adjuster,

[0024] S45, determining the position of a support pad iron on the structure beam, and placing the support pad iron between the structure beam and the track slab.

[0025] Preferably, in the S5 step, one measurement point is selected at each of the four corners of the track slab, and the first actual coordinates of each measurement point are measured.

[0026] As preferred, in the S8 step, the deviation between the retest result and the theoretical coordinate needs to meet a preset deviation standard, which includes: the long-wave deviation of the actual slope center line of the track plate relative to the slope center line in the theoretical model is ±5mm, the short-wave deviation is ±1mm; the NGK of the sliding surface on the actual track plate meets 1.5mm / 1m-3.0mm / 1m; the NGK of the guide surface meets 1.0mm / 1m-2.0mm / 1m; the NGK of the stator surface meets 0.75mm / 1m-1.5mm / 1m.

[0027] As preferred, in the S7 step,

[0028] The position of the track plate is adjusted by the adjuster on the basis of the adjustment correction amount, which includes:

[0029] The adjuster adjusts the height of the track plate, and the triangular adjustment pad iron or the number of support pad irons between the track plate and the structure beam are increased or decreased to adjust the levelness of the track plate and the height of the track plate.

[0030] As preferred, when the position of the track plate is adjusted, the height difference of the sliding surface between adjacent track plates should be less than 0.5mm; the dislocation deviation value of the guide surface between adjacent track plates should be less than 0.5mm.

[0031] As preferred, in the S9 step,

[0032] The track plate and the structure beam are connected and fixed by a connecting structure preset between the track plate and the structure beam.

[0033] The adjuster is removed after the track plate and the structure beam are connected.

[0034] As preferred, the connecting structure includes a bolt sleeve preset on the track plate and a threaded sleeve preset on the structure beam, the bolt sleeve penetrates the track plate, a screw rod is arranged in the bolt sleeve, a rotating eccentric nut is arranged in the threaded sleeve, and the screw rod can be connected with the eccentric nut.

[0035] As preferred, between the S3 and the S4, a track plate hoisting simulation is further included.

[0036] The beneficial effects of the present application are:

[0037] The preliminary positioning is installed through the theoretical coordinates and the measurement control network, and then the correction of the first actual coordinates and the theoretical coordinates is measured, so that the track plate can be adjusted; then the track plate is adjusted again during the re-measurement, and the accuracy requirement of the track plate installation to the structure beam can be met through multiple adjustments, and the deviation generated in the construction process is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a flow chart of the installation method of the high-speed maglev track plate and the structure beam connection of the application;

[0039] Figure 2 is a specific flow chart of the S4 step in the installation method of the high-speed maglev track plate and the structure beam connection of the application;

[0040] Figure 3 is a schematic diagram of the measurement points of the track plate in the application;

[0041] Figure 4 is a schematic diagram of the connection structure connecting the track plate and the structure beam in the application.

[0042] In the drawings:

[0043] 1, track plate; 11, sliding surface; 12, guide surface; 13, stator surface;

[0044] 2, structure beam;

[0045] 3, connection structure; 31, bolt sleeve; 32, threaded sleeve; 33, screw; 34, eccentric nut;

[0046] 4, measurement point. DETAILED DESCRIPTION

[0047] The application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the application are shown in the drawings, not all the structures.

[0048] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0050] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and the like orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description and have no special meaning.

[0051] As shown in Figures 1 to 4 The present embodiment provides a mounting method for connecting high-speed maglev track plates and structural beams, which can efficiently and accurately complete the installation of high-speed maglev track plates 1 and structural beams 2. The method comprises the following steps:

[0052] S1, a measurement control network is established on site, which provides a basis for on-site installation and subsequent measurement. In the present embodiment, the measurement control network is a CPIII measurement control network. The control points of the CPIII measurement control network are arranged on both sides along the preset extension direction of the maglev track. In order to ensure the accuracy of subsequent installation and measurement, the distance between two adjacent control points located on the same side of the maglev track is 50-70m. It can be understood that the specific distance value of the control points is determined by the effective working range of the on-site measuring instrument and the line working condition, as long as it is within the range. In addition, the data of the control points of the CPIII measurement control network is collected by a laser tracker and is periodically reviewed. The review operation can be implemented between each step.

[0053] S2, a complete theoretical model of the maglev track is established through the measurement control network and three-dimensional software, so that the theoretical coordinates of the entire maglev track can be obtained according to the theoretical model. It can be understood that the theoretical coordinates of the entire maglev track include the theoretical coordinates of each track plate 1 and structural beam 2, which provides a theoretical basis for installation. Exemplarily, three-dimensional software such as SpatialAnalyzer can be used.

[0054] S3, according to the requirements of the measurement control network and the theoretical coordinates, the structural beam 2 is installed along the preset extension direction of the maglev track, which can be installed in a hoisting manner, and the installation method can adopt the method for the elevated structural beam 2 in the prior art; wherein the position of the structural beam 2 is re-measured after installation, which can be measured by a total station and the like, and S4 can be performed after meeting the standard; it should be noted that the standard here can be executed according to the existing high-speed maglev transportation design standard (CJJ / T310-2021).

[0055] S4, the track plate 1 is initially positioned on the structural beam 2 according to the theoretical coordinates and the measurement control network, and the initial positioning is performed, which specifically includes the following steps:

[0056] It should be noted that after the S3 step is completed, the S4 step can be performed, and the hoisting of the track plate 1 can be simulated in the laboratory, so as to avoid various unexpected situations such as collision during hoisting through hoisting simulation experiment; for example, the variables of various hoisting processes are simulated through BIM combined with 3DMax and the like virtual visualization hoisting simulation technology, and the feasibility of the hoisting scheme is verified in advance;

[0057] S41, the track plate 1 and the structural beam 2 are re-measured; for example, the length, width and height data of the track plate 1 are re-measured to provide basic data support for subsequent installation and adjustment of the track plate 1; the axis position of the track plate 1 is re-measured, and the positions of various functional components of the track plate 1 and the structural beam 2 are re-measured to provide a basis for installation of the track plate 1 on the structural beam 2, wherein the functional components include but are not limited to the connecting structure 3 for connecting the structural beam 2, and the position data of the connecting structure 3 can facilitate subsequent adjustment of the track plate 1 when connecting the structural beam 2;

[0058] S42, generally, the supply state of the track plate 1 is that the stator face 13 is on the top and the sliding surface 11 is on the bottom, so that the track plate 1 is turned over by the hoisting device, so that the stator face 13 is on the bottom and the sliding surface 11 is on the top to enable normal installation; the hoisting device can be but is not limited to a crane and the like;

[0059] S43, before the track plate 1 is installed on the structural beam 2, an adjuster needs to be installed on the structural beam 2, wherein the adjuster is used to adjust the position of the track plate 1 on the structural beam 2 to facilitate subsequent position adjustment; it should be noted that the adjuster is prior art and will not be described in detail.

[0060] S44, hoist the track slab 1 after turning over to the adjuster on the structure beam 2 with the hoisting device mentioned above, and pre-fix it. When installing, the axis of the track slab 1 deviates from the axis of the structure beam 2 by less than 1 mm. In this embodiment, a crane is used. The crane is as close to the installation position as possible to ensure the shortest turning radius. When hoisting, the track slab 1 can be hoisted by using a sling to bundle it. Alternatively, a lifting lug can be installed on the track slab 1 during hoisting, and a stretching device such as a winch is connected through the lifting lug to reduce the hoisting height.

[0061] S45, determine the support pad iron position on the structure beam 2, and place the support pad iron between the structure beam 2 and the track slab 1. The support pad iron supports the track slab 1, facilitating subsequent adjustment, and leaves a gap between the structure beam 2 and the track slab 1, facilitating subsequent grouting connection. In this embodiment, the support pad iron is a thick flat pad iron with a length of 150 mm, a width of 60 mm, and a thickness of 30 mm. The number can be adjusted according to the gap reserved on the design drawing, and can be adjusted and processed according to the site construction. The surface of the support pad iron needs to be chiseled flat.

[0062] S5, select a measurement point 4 on the preliminarily positioned track slab 1. The measurement point 4 on each track slab remains fixed to ensure that each measurement is the same point, and the first actual coordinates of the track slab 1 are measured, including X coordinates, Y coordinates, and Z coordinates. As shown in the figure, four measurement points 4 are selected, which are located at the four corners of the track slab 1. The measurement tool uses a total station. Figure 3

[0063] S6, compare the first actual coordinates with the theoretical coordinates, and combine the length, width, and height data of the track slab 1 to obtain the adjustment correction amount. Thus, the installation deviation can be corrected according to the adjustment correction amount to provide data support for adjusting the track slab 1. The correction process can be realized by rotating and translating the coordinates.

[0064] S7, adjust the position of the track slab 1 according to the adjustment correction amount. The specific steps are as follows:

[0065] Translation in the X direction generally does not need to be corrected. When installing two adjacent track slabs 1, length compensation can be performed during the re-measurement based on the next track slab 1.

[0066] ​For the levelness adjustment of the track slab 1, the track slab 1 can be lifted by the adjuster, and then the triangular adjustment pads or the number of support pads between the track slab 1 and the structure beam 2 are increased or decreased for adjustment; for the height (Z direction) adjustment of the track slab 1, the triangular adjustment pads or the number of support pads between the track slab 1 and the structure beam 2 are increased or decreased; the triangular adjustment pad mentioned above is a right-angled triangular pad, and the size is 150mmX60mm, and the thickest part is 30mm. When the position of the track slab 1 is adjusted, the height difference of the sliding surface 11 between the adjacent track slabs 1 should be less than 0.5mm; the misalignment deviation of the guide surface 12 between the adjacent track slabs 1 should be less than 0.5mm.

[0067] S8, the track slab 1 is re-measured to obtain a re-measurement result, if the re-measurement result is qualified, S9 is performed; if not, S7 is returned; specifically, the deviation between the re-measurement result and the theoretical coordinate needs to meet a preset deviation standard, the deviation standard includes: the long wave deviation of the actual track slab 1 gradient center line relative to the gradient center line in the theoretical model is ±5mm, the short wave deviation is ±1mm; the NGK of the sliding surface 11 on the actual track slab 1 satisfies 1.5mm / 1m-3.0mm / 1m; the NGK of the guide surface 12 satisfies 1.0mm / 1m-2.0mm / 1m; the NGK of the stator surface 13 satisfies 0.75mm / 1m-1.5mm / 1m. The long wave deviation of the gradient center line (long wave deviation: in one beam span range, the fitting curve calculated by interpolation according to the discrete track slab measurement point value, the error value between the fitting curve and the theoretical curve), the short wave deviation (short wave deviation: in one beam span range, the fitting curve calculated by interpolation according to the discrete track slab measurement point value, the error value between the fitting curve and the theoretical curve) and the NGK (gradient change index) are common sense of those skilled in the art, which will not be explained here.

[0068] S9, the track slab 1 and the structure beam 2 are connected and fixed through the connecting structure 3 preset between the track slab 1 and the structure beam 2; as shown in Figure 4 The connecting structure 3 includes a bolt sleeve 31 preset on the track slab 1 and a threaded sleeve 32 preset on the structure beam 2, the bolt sleeve 31 penetrates the track slab 1, a screw rod 33 is arranged in the bolt sleeve 31, an eccentric nut 34 rotatingly arranged in the threaded sleeve 32, and the screw rod 33 can be connected with the eccentric nut 34. When connecting, it needs to be noted that the adjustment angle of the eccentric nut 34 is pre-positioned according to the measurement control network when the structure beam 2 is installed. The screw rod 33 in the bolt sleeve 31 is opposite to the eccentric nut 34, and then the screw rod 33 is rotated to connect the screw rod 33 with the eccentric nut 34, so as to connect the track slab 1 with the structure beam 2 together; after the connection is completed, the adjuster is removed; the eccentric nut 34 of the connecting structure 3 can compensate the position deviation during installation and adjustment, and is convenient for connection.

[0069] S10, the concrete is grouted to connect the track slab 1 and the structural beam 2, and the concrete grouting process will not be described in detail.

[0070] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation manners of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation manners. Any modification, equivalent substitution and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A method of installing a high-speed maglev track slab to a structural beam, characterized in that, The method comprises the following steps: S1, establishing a measurement control network; S2, establishing a theoretical model of the whole maglev track to obtain a theoretical coordinate of the maglev track; S3, installing a structural beam (2) according to the theoretical coordinate and the measurement control network; S4, initially positioning a track plate (1) on the structural beam (2) according to the theoretical coordinate and the measurement control network; S5, measuring a first actual coordinate of the track plate (1); S6, comparing the first actual coordinate with the theoretical coordinate to obtain an adjustment correction; S7, adjusting the position of the track plate (1) according to the adjustment correction; S8, re-measuring the track plate (1) to obtain a re-measurement result, and if the re-measurement result is qualified, performing S9, otherwise returning to S7; S9, fastening the track plate (1) and the structural beam (2); S10, grouting to connect the track plate (1) and the structural beam (2); The step S4 comprises: S41, performing a basic re-measurement on the track plate (1) and the structural beam (2); S42, turning over the track plate (1); S43, installing an adjuster on the structural beam (2); S44, hoisting the turned-over track plate (1) to the adjuster, S45, determining the position of a support pad iron on the structural beam (2), and placing the support pad iron between the structural beam (2) and the track plate (1); In the step S9, The track plate (1) and the structural beam (2) are connected and fixed through a connecting structure (3) pre-set between the track plate (1) and the structural beam (2); After the track plate (1) and the structural beam (2) are connected, the adjuster is removed; The connecting structure (3) comprises a bolt sleeve (31) pre-set on the track plate (1) and a threaded sleeve (32) pre-set on the structural beam (2), the bolt sleeve (31) penetrates the track plate (1), a screw rod (33) is arranged in the bolt sleeve (31), an eccentric nut is arranged in the threaded sleeve (32) and rotates, and the screw rod (33) can be connected with the eccentric nut.

2. The method of claim 1, wherein, The measurement control network is a CPIII measurement control network, the CPIII measurement control network is a foundation pile control network, control points of the CPIII measurement control network are arranged on both sides along a preset extension direction of the maglev track, and the interval between two adjacent control points located on the same side of the maglev track is 50-70 m.

3. The method of claim 1, wherein, In the step S5, one measurement point (4) is selected at each of four corners of the track plate (1), and the first actual coordinate of each measurement point (4) is measured. In the step S5, one measurement point (4) is selected at each of four corners of the track plate (1), and the first actual coordinate of each measurement point (4) is measured.

4. The method of claim 1, wherein, In the S8 step, the deviation between the retest result and the theoretical coordinate needs to meet the preset deviation standard, and the deviation standard includes: the long wave deviation of the actual slope center line of the track slab (1) relative to the slope center line in the theoretical model is ± 5mm, the short wave deviation is ± 1mm; The NGK of the sliding surface (11) on the actual track slab (1) satisfies 1.5mm / 1m-3.0mm / 1m; The NGK of the guide surface (12) satisfies 1.0mm / 1m-2.0mm / 1m; The NGK of the stator surface (13) satisfies 0.75mm / 1m-1.5mm / 1m.

5. The method of claim 1, wherein, In the S7 step, The position of the track slab (1) is adjusted by the adjuster on the basis of the adjustment correction amount, which includes: The height of the track slab (1) is adjusted by the adjuster, and the triangular adjustment pad iron or the number of support pad irons between the track slab (1) and the structure beam (2) is increased or decreased to adjust the levelness and the height of the track slab (1).

6. The method of claim 5, wherein, When adjusting the position of the track slab (1), the height difference of the sliding surface (11) between adjacent track slabs (1) should be less than 0.5mm; The misalignment deviation value of the guide surface (12) between adjacent track slabs (1) should be less than 0.5mm.

7. The method of installing a high-speed maglev track slab and structural beam connection of claim 1, wherein, Between the S3 and the S4, the track slab (1) hoisting simulation is also included.

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