A trackless construction method for a subway platform screen door

Abstract

The present application relates to the field of subway platform screen door construction, in particular to a trackless construction method of subway platform screen door, comprising determining track theoretical center line, base installation hole positioning, base installation, base position adjustment, platform screen door installation, improving subway platform construction efficiency, shortening on-site construction period, reducing dependence on station space, avoiding long-time occupation of track area by traditional screen door construction, reducing interference of track area driving on screen door installation; reducing connection obstacles of each construction link, reducing construction cost, reducing construction personnel participation, avoiding part of construction safety risks; compared with traditional screen door construction, reducing construction process rework, improving construction quality, reducing cross operation; avoiding dislocation of base installation position caused by track position adjustment.

Description

Technical Field

[0001] This invention relates to the field of subway platform screen door construction, and particularly to a trackless construction method for subway platform screen doors. Background Technology

[0002] Traditional subway platform screen doors are constructed using a track-based system. This process requires the completion of track switches and rails in the platform level track area, as well as the adjustment of the rail top elevation and clearance, before the platform screen doors can be installed. Traditional subway platform screen door construction is carried out after the tracks are laid and adjusted. The screen doors need to be positioned based on the clearance measurement of the rail top elevation and the center line of the rail surface to determine the installation location of the screen door base.

[0003] However, the traditional installation of subway platform screen doors has the following drawbacks: (1) When the track top elevation and clearance are readjusted, the base of the platform screen door will be misaligned and the base needs to be reinstalled; (2) When the track is laid, errors may occur in the layout data measured based on the track position, which may lead to misalignment of the platform base installation. (3) The construction of traditional subway platform screen doors with rails needs to be carried out after the rails are laid, which prolongs the construction period and increases the construction cost; (4) Traditional subway platform screen doors are constructed using tracked construction, which involves a lot of cross-operations, limited construction time in the track area, and interference with train traffic in the track area. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the misalignment of the platform screen door base after adjusting the rail top elevation and clearance, the tendency of the layout data measured based on the track position to lead to misalignment of the platform base installation, and the large number of cross-operations in the tracked construction of subway platform screen doors. This invention provides a trackless construction method for subway platform screen doors.

[0005] This invention provides a trackless construction method for subway platform screen doors, comprising the following steps: S1. Determine the theoretical centerline of the track: Determine the theoretical centerline of the track through the CP3 point in the track section; S2. Base mounting hole positioning: Using the theoretical center line of the track as a reference, measure the distance between the edge of the platform plate and the theoretical center line of the track, measure the width of the mounting groove of the platform plate, obtain the mounting hole position of the base, and drill the mounting hole according to the mounting hole position; S3. Base installation: Fix the base through the mounting holes; S4. Base position adjustment: After the track is laid, adjust the installation position of the base according to the actual rail top elevation and clearance of the track. S5. Platform screen door installation: Install the platform plate mounting slot on the base and install the screen door in the platform plate mounting slot.

[0006] Preferably, in step S2, after measuring the width of the platform mounting groove, the base centerline is set along the track direction according to the track centerline determined by point CP3, and several bases are arranged at intervals on the base centerline.

[0007] Preferably, the center line of the base is offset by up to 10 mm towards the center of the platform. Preferably, in step S2, permanent steel nails are provided on the track side of the platform and the base mounting surface of the platform, respectively. The permanent steel nails are used as a reference for laying out the center line of the base.

[0008] Preferably, the platform slab has three permanent steel nails on the side of the track; the platform slab also has three permanent steel nails on the base mounting surface.

[0009] Preferably, in step S2, mounting holes are drilled from the center of the platform outwards along the center line of the base.

[0010] Preferably, in step S2, after the mounting holes are drilled, the position of the mounting hole fixing hole on the track duct beam is located according to the position of the mounting hole, and the mounting hole fixing hole is opened to fix the upper mounting part, which is used to fix the shielding door.

[0011] Preferably, in step S3, after the base is installed, the upper hanging part is installed through the hanging part fixing hole; in step S4, the base and the upper hanging part are arranged opposite to each other, and the position of the upper hanging part is adjusted according to the position of the base after adjustment.

[0012] Preferably, the upper bracket includes an L-shaped connector, and the bracket fixing holes include a first strip hole and a second strip hole. The L-shaped connector is connected to the first strip hole and the L-shaped connector is connected to the second strip hole. The first strip hole is set in a horizontal direction and the first strip hole and the second strip hole are parallel. The L-shaped connector is fixed to the air duct beam by through bolts between itself and the first and second strip holes.

[0013] Preferably, in step S5, before installing the platform plate mounting groove on the base, a column is set on the base, with one end of the column connected to the base and the other end connected to the upper hanging part.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a trackless construction method for subway platform screen doors. The theoretical center line of the track is determined by the CP3 point in the track section, and the mounting holes of the base are positioned by the theoretical center line of the track. This avoids measuring the installation position of the base by the rail top elevation and the rail surface center line, thereby avoiding misalignment of the base installation position due to track position adjustment, and avoiding misalignment of the platform base installation caused by the layout data measured based on the track position.

[0015] 2. This invention provides a trackless construction method for subway platform screen doors. The deviation between the theoretical centerline of the track measured at point CP3 and the actual centerline of the track is small. The theoretical centerline of the track is used to determine the base installation position. After the base is installed, the deviation between the base installation position and the required installation position after track adjustment is small. Fine-tuning the base allows it to be positioned as needed, enabling base installation to be carried out simultaneously with track laying, or concurrently with advanced track laying. This avoids the dependence of base installation on the completion of track laying, allowing for dual-track operations, thereby improving construction efficiency in the subway platform area and reducing overlapping work.

[0016] 3. This invention provides a trackless construction method for subway platform screen doors, which improves the construction efficiency of subway platforms, shortens the on-site construction cycle, reduces dependence on station space, avoids the long-term occupation of the track area by traditional screen door construction, reduces the interference of train traffic in the track area on screen door installation, reduces obstacles in the connection between various construction links, reduces construction costs, reduces the involvement of construction personnel, and avoids some construction safety risks. Compared with traditional screen door construction, it reduces rework of construction procedures and improves construction quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a trackless construction method for subway platform screen doors according to the present invention. Figure 2 This is a schematic diagram of the base structure of a trackless construction method for subway platform screen doors according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the installation groove of the platform plate in a trackless construction method for subway platform screen doors according to Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the base centerline arrangement of a trackless construction method for subway platform screen doors according to Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the arrangement of permanent steel nails in a trackless construction method for subway platform screen doors according to Embodiment 1 of the present invention.

[0018] Marked in the image: 1-Base, 2-Platform mounting groove, 3-Column, 4-Upper bracket, 5-Bracket fixing hole, 6-Base center line, 7-Measurement baseline, 8-Permanent steel nail, 9-Mounting hole 100-Platform plate, 101-Rail duct beam, 102-Base mounting surface, 103-Rail side. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0020] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0021] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0022] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0023] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0024] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0025] Example 1 like Figures 1-5 As shown, a method for trackless construction of subway platform screen doors specifically includes the following steps: S1. Determine the theoretical centerline of the track: The theoretical centerline of the track is determined by the CP3 point in the track section. The CP3 point is a three-level control network used for fine-tuning of the track in track engineering. The first two levels are the CP0 plane reference network and the CP1 / CP2 line control network. It is deployed by high-precision global satellite navigation system, total station and other equipment, and directly serves the fine-tuning process such as track fastener installation, gauge adjustment and elevation calibration to ensure that the track smoothness and stability meet the design standards.

[0026] S2. Positioning of mounting holes 9: Based on the theoretical center line of the track, measure the distance between the edge of the platform plate 100 and the theoretical center line of the track, and measure the width of the mounting groove 2 of the platform plate to obtain the mounting hole position of the base 1. Drill the mounting hole 9 according to the mounting hole position. The mounting hole position of the base 1 must ensure that the base 1 does not exceed the theoretical limit. In actual operation, a margin can be left for fine adjustment of the position of the base 1 according to the actual rail top elevation and limit of the track after the track is laid. S3, Base 1 installation: Fix base 1 through mounting holes 9, and connect base 1 to platform plate 100 with bolts; S4. Adjustment of the position of base 1: After the track is laid, the installation position of base 1 shall be adjusted according to the actual rail top elevation and clearance of the track. There is a deviation between the actual center line of the track and the theoretical center line of the track in actual construction. The installation position of base 1 shall be adjusted according to the actual center line of the track to avoid base 1 from exceeding the clearance. S5. Platform screen door installation: Install the platform plate mounting groove 2 on the base 1, and install the screen door on the platform plate mounting groove 2; after the position of the base 1 is adjusted, and it is confirmed that the actual center line position of the track will not change, the screen door will be installed.

[0027] In one or more embodiments, in S2, after measuring the width of the platform plate mounting groove 2, the base center line 6 is set along the direction of the track according to the track center line determined by point CP3. Several bases 1 are arranged at intervals on the base center line 6. The mounting groove is supported by several bases 1, so that the platform door can completely isolate the track area and the platform area.

[0028] In an optional implementation, the center line 6 of the base is offset by up to 10mm in the direction of the station center of the platform 100. In the later stage, only the base 1 needs to be adjusted to meet the clearance requirements. In an optional embodiment, in S2, permanent steel nails 8 are respectively provided on the track side 103 of the platform plate 100 and the mounting surface 102 of the base 1 of the platform plate 100. The permanent steel nails 8 are used as the reference for laying out the center line 6 of the base, thereby ensuring the accuracy of the center line 6 of the base.

[0029] In an optional embodiment, the track side 103 of the platform 100 is provided with three permanent steel nails 8; the mounting surface 102 of the base 1 of the platform 100 is provided with three permanent steel nails 8, and the permanent steel nails 8 on the mounting surface 102 of the base 1 of the platform 100 form a measurement reference line 7, which can be used as the basis for subsequent re-measurement of the mounting position of the base 1.

[0030] In an optional implementation, in S2, mounting holes 9 are drilled from the center of the platform to both sides along the direction of the base centerline 6 to reduce cumulative errors and ensure the accuracy of the installation position of the base 1.

[0031] In one or more embodiments, in S2, after the mounting hole 9 is drilled, the position of the hanging fixing hole 5 on the track ventilation beam 101 is located according to the position of the mounting hole. The hanging fixing hole 5 is opened to fix the upper hanging part 4. Then, according to the 2‰ slope of the platform plate 100, the upper hanging part 4 is used to fix the platform door column. The upper part of the platform door is connected through the upper hanging part 4, and the lower part of the platform door is fixed through the platform plate mounting groove 2, so that the platform door is firmly fixed and the platform door can isolate the train running area from the platform area.

[0032] In an optional implementation, in S3, after the base 1 is installed, the upper hanging part 4 is installed through the hanging part fixing hole 5; in S4, the base 1 and the upper hanging part 4 are set opposite to each other, and the position of the upper hanging part 4 is adjusted according to the adjusted position of the base 1, so as to ensure that the shielding door is installed vertically.

[0033] In an optional embodiment, the upper hanger 4 includes an L-shaped connector, and the hanger fixing hole 5 includes a first strip hole and a second strip hole. The L-shaped connector is connected to the first strip hole and the second strip hole. The first strip hole is set in a horizontal direction and is parallel to the second strip hole. The L-shaped connector is convenient to be connected to the side of the track duct beam 101. The position of the L-shaped connector can be adjusted through the first strip hole and the second strip hole. The L-shaped connector is fixed to the track duct beam 101 by through bolts between it and the first strip hole and the second strip hole.

[0034] In an optional embodiment, in S5, before installing the platform plate mounting groove 2 on the base 1, a column 3 is set on the base 1. One end of the column 3 is connected to the base 1, and the other end is connected to the upper hanging part 4. The column 3 strengthens the connection between the base 1 and the upper hanging part 4. According to the 2‰ slope of the platform plate 100 and the adjustment diagram, the column 3 and the platform plate mounting groove 2 are kept perpendicular to each other at 90° to ensure the connection of the platform door.

[0035] The specific construction process is as follows: Construction preparation → CP3 result measurement, layout, measurement of base center line 6 and clearance → Drilling of base mounting holes 9, drilling of track duct beam 101 hanging fixing holes 5 on the rail top → Base 1 installation, base 1 clearance detection → Base 1 position adjustment, base 1 clearance re-measurement → Track duct beam 101 upper hanging part 4 installation → Column 3 installation, column 3 clearance re-measurement → Shielding door installation, door clearance re-measurement → Electrical installation.

[0036] Specifically: 1. Based on the CP3 results, using the theoretical centerline of the track as a reference, measure the distance between the edge of the platform plate 100 and the theoretical centerline of the track, and measure the width of the platform plate mounting groove 2; measure the distance between the edge of the platform plate 100 and the theoretical centerline of the track, and the standard width of the platform plate mounting groove 2 is 300mm.

[0037] 2. Using the rail top as the reference elevation, measure the height of the lower surface of the track ventilation beam 101 at the top of the platform slab 100. Compare the measured construction data with the drawing data. If the data error is large, the track ventilation beam 101 at the rail top needs to be rectified. After the rectification is completed, the data of the track ventilation beam 101 at the rail top is remeasured until the track ventilation beam 101 meets the requirements.

[0038] 3. Using the theoretical centerline of the track as a reference, measure the distance between the platform side surface of track ventilation beam 101 and the theoretical centerline of the track, and measure the thickness of track ventilation beam 101; the standard distance between the platform side surface of track ventilation beam 101 and the theoretical centerline of the track is 1600mm, and the standard thickness of track ventilation beam 101 is 250mm.

[0039] 4. Drive three permanent steel nails 8 on the side 103 of the track on the platform 100 and on the mounting groove 2 of the platform 100. One permanent steel nail 8 is located at the center of the platform and one at each of the left and right end door positions on the side 103 of the track on the platform 100. The other permanent steel nail 8 is located at the center of the platform and one at each of the left and right end door positions on the mounting groove 2 of the platform 100. These serve as the benchmark for layout and the basis for subsequent re-measurement.

[0040] 5. The permanent steel nails 8 driven into the side of the track 103 of the platform 100 are 850mm high. Taking the center of the platform as the reference, measure the distance from the top of the track to 850mm every 20m and mark it. After marking, connect the marked points to form the center line 6 of the base. The center line 6 of the base is 850mm away from the top of the track. This height is the standard installation reference for the distance between the platform screen door base 1 and the top of the track.

[0041] 6. The permanent steel nails 8 driven into the mounting groove 2 of the platform plate are 1745mm away from the theoretical center line of the track. Taking the center of the platform as the reference, measure the distance of the distance of the distance of the distance of the distance of the track to the theoretical center line of the track every 20m and mark it. After the marking is completed, the entire side is laid out with the marked points connected to the line, 1745mm away from the theoretical center line of the track.

[0042] 7. If there are embedded parts on the top civil engineering track ventilation beam 101, no line layout is required. If there are no embedded parts, line layout is required on the platform surface of track ventilation beam 101. The line layout is based on the center of the platform. Every 20m, measure and mark the position at a distance of 4350mm from the top of the rail. After marking, the entire side is laid out by connecting the marked points to form the installation center line of the upper hanging part 4. The distance between the installation center line of the upper hanging part 4 and the top of the rail surface is 4350mm.

[0043] 8. On the mounting groove 2 of the platform plate, with the 1745mm line as the reference, drill holes from the center of the platform to both sides according to the center line 6 of the base. Drilling holes from the center of the platform to both sides can reduce drilling error and limit detection error.

[0044] 10. The center deviation of the drilling hole 9 should be ≤4mm, the verticality of the drilling should be <3%, and the hole wall should be smooth and vertical to ensure that the PVC pipe used to prevent concrete blockage can pass through the drilling hole 9 normally.

[0045] Specifically, the base 1 is installed at intervals according to the base center line 6 on the platform plate 100. The base 1 is installed sequentially from the center of the platform to both sides along the base center line 6. In order to control the accumulated error, the position of each base 1 is checked against the limit size with the effective platform center line as the reference. The base center line 6 can be offset by 10mm towards the center of the station for layout, which avoids the problem of encroachment caused by uneven platform installation surface. At the same time, it can leave a margin for adjusting the position of the base 1 to prevent the base 1 from exceeding the actual track limit.

[0046] The effective platform centerline is a baseline extending from the center of the platform and perpendicular to the theoretical centerline of the track. The effective platform centerline is perpendicular to the base centerline 6.

[0047] Installation of the upper hanger 4 on the track top of the track ventilation beam 101: According to the position of the upper hanger 4 on the track ventilation beam 101, the upper hanger 4 is installed sequentially from the effective platform centerline to both sides. The upper hanger 4 is an L-shaped connector. In order to control the accumulated error, the position of each L-shaped connector is checked with the effective platform centerline as the reference.

[0048] Specifically, the installation and positioning dimensions of column 3 are based on the top of the rail and the theoretical center line of the track; combined with the 2‰ slope of the platform 100, column 3 must be installed perpendicular to the plane of the platform 100; use a level to check the horizontality of the upper surface of the steel plate of column 3 in the X and Y directions, and level the bottom steel plate of column 3 to a flatness of ±1mm; each of the four adjusting bolts of column 3 has an insulating sleeve to insulate column 3 and the entire shielding door from the ground, preventing the shielding door from being damaged by arcing; the leveling of the base plate of column 3 is also achieved through the four adjusting bolts; the four adjusting bolts are respectively connected to the base 1.

[0049] The platform screen door threshold is installed after the clearance adjustment of base 1 is completed. The platform screen door threshold is fixed to base 1 to ensure that the guide groove gaps of adjacent platform screen door thresholds are consistent, thus avoiding difficulties in opening and closing the sliding door later. The clearance of the platform screen door threshold depends on the clearance of base 1. After the platform screen door threshold is installed, its width will not exceed the side 103 of base 1 near the track, thus ensuring that the clearance of platform screen door threshold is correct when the clearance of base 1 is correct.

[0050] During the installation of column 3, after each column 3 is fixed to the base 1, the installation center line of each column 3 needs to be measured to ensure that the distance between the edge of each column 3 and the theoretical center line of the track is within the error range of the design standard distance; the column 3 also needs to ensure that the perpendicularity between the column 3 and the platform 100 is 90° according to the tilt requirement of 1002‰.

[0051] Specifically, after the column 3 is installed, the gantry beam is installed. The gantry beam is used to support the sliding door, and the center of each sliding door must be aligned with the center of the gantry beam. The deviation between the center of the gantry beam and the center line of the sliding door is ±2mm. In combination with the 2‰ slope of the platform 100, shims are used to adjust the level of the gantry beam when installing it. The slope and verticality of the gantry beam are adjusted by adjusting the shims to ensure that the gantry beam is parallel to the top surface of the track, the vertical surface of the gantry beam is vertical, and the profile surface of the gantry beam is perpendicular to the plane of column 3.

[0052] In the clearance test of the gantry crane beam, since the clearance of the column 3 has been adjusted in the early stage, it is only necessary to measure whether the distance between the side 103 of the column 3 near the track and the side 103 of the gantry crane beam near the track is within the design standard error range. If the deviation is too large, the clearance can be adjusted by moving the gantry crane beam back and forth. There is no need to adjust the clearance of other mechanisms.

[0053] Installation of the rear cover plate of the gantry crane beam: Pre-install bolt groups at both ends of the gantry crane beam, install the rear cover plate onto the gantry crane beam, and bolt the lower part of the rear cover plate to the pre-drilled bolt holes at the lower part of the gantry crane beam. As long as the clearance test of the gantry crane beam is within the design standard, the clearance of the rear cover plate can be guaranteed to be qualified.

[0054] Specifically, after the gantry crane beam rear cover plate is installed, the shielding doors are installed. The shielding doors include sliding doors, fixed doors, and emergency doors. 1. Sliding door installation: Install the upper hanging plate on the upper part of the sliding door with bolts. The upper hanging plate is equipped with hanging wheels. The upper part of the sliding door is hung on the door motor beam guide rail by the hanging wheels. The bottom guide shoe is inserted into the sill gap. Connect the hanging wheels and belt together to complete the sliding door installation.

[0055] 2. Fixed door installation: The platform plate mounting groove 2 serves as the lower shaft seat. The lower part of the fixed door is placed on the lower shaft seat. The upper part of the fixed door near the column 3 is connected and fixed to the column 3 by bolts and brackets. The two sides of the fixed door lintel are fixed to the bracket of the column 3 by bolt groups to complete the installation.

[0056] 3. Emergency door installation: After the emergency door lintel is installed, adjust the emergency door lock rod according to the actual site conditions to ensure that when the emergency door is locked, the lower locking pin can be locked into the lower stop hole by more than 5mm, and the upper locking pin can be locked into the emergency door lintel by more than 8mm; when the emergency door is unlocked and opened and closed, the lower locking pin is 2mm higher than the emergency door threshold.

[0057] 4. Door clearance test: Measure the distance between the sliding door, fixed door, and emergency door and the center line 6 of the base on the side of the track 103 to see if they are within the design standard. If the deviation is too large, the clearance of the base 1 needs to be readjusted.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for trackless construction of subway platform screen doors, characterized in that, Includes the following steps: S1. Determine the theoretical centerline of the track: Determine the theoretical centerline of the track through point CP3 in the track section; S2. Base mounting hole positioning: Using the theoretical centerline of the track as a reference, measure the distance between the edge of the platform plate and the theoretical centerline of the track, and measure the width of the platform plate mounting groove to obtain the mounting hole positions of the base; after measuring the width of the platform plate mounting groove, set the base centerline along the track direction according to the track centerline determined by CP3, with several bases spaced apart on the base centerline; the base centerline is offset by no more than 10mm towards the center of the platform plate; permanent steel nails are set on the track side of the platform plate and the base mounting surface of the platform plate respectively, and the permanent steel nails are used as the reference for laying out the base centerline; three permanent steel nails are set on the track side of the platform plate; three permanent steel nails are set on the base mounting surface of the platform plate; along the direction of the base centerline, drilling mounting holes from the center of the platform to both sides; after the mounting holes are drilled, locate the position of the hanging fixing holes on the track duct beam according to the position of the mounting holes, and open the hanging fixing holes for fixing the upper hanging parts, which are used to fix the platform screen door; S3. Base installation: Fix the base through the mounting holes; after the base is installed, install the upper bracket through the bracket fixing holes; S4. Base Position Adjustment: After the track is laid, adjust the installation position of the base according to the actual rail top elevation and clearance of the track; the base and the upper bracket are set opposite each other, and the position of the upper bracket is adjusted according to the adjusted position of the base; S5. Platform screen door installation: Before installing the platform panel mounting slot on the base, set up a column on the base, with one end of the column connected to the base and the other end connected to the upper hanging part; install the platform panel mounting slot on the base and install the screen door in the platform panel mounting slot.

2. The method for trackless construction of subway platform screen doors according to claim 1, characterized in that, The upper bracket includes an L-shaped connector, and the bracket fixing holes include a first strip hole and a second strip hole. The L-shaped connector is connected to the first strip hole and the L-shaped connector is connected to the second strip hole. The first strip hole is set in the horizontal direction and is parallel to the second strip hole. The L-shaped connector is fixed to the track duct beam by through bolts between itself and the first and second strip holes.

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