Construction method for expanding existing station building

Abstract

The construction method for expanding an existing station building provided by the application comprises a jacking stage and a beam falling stage: in the jacking stage, a distance sensor arranged at the tail end of a slide rail is used to measure the jacking distance of the steel structure of the newly-built station building on the slide rail; the working parameters of a power mechanism for providing jacking power are adjusted according to the jacking distance fed back by the distance sensor; and the jacking precision is improved. In the beam falling stage, height detection units are arranged at multiple positions of the steel structure of the newly-built station building; the extension length of a beam falling support oil cylinder at each position is adjusted according to the height data output by the height detection units at the multiple positions, and the beam falling precision is improved.

Description

Technical Field

[0001] This application relates to the technical field of expanding existing station buildings, specifically to a construction method for expanding existing station buildings. The steel structure of the new station building is pushed from the side to above the operating line, and then reaches the design position and connects with the existing station building by lowering the beams. In order to avoid affecting the normal operation of the operating line, the whole process usually needs to be completed in multiple windows. Background Technology

[0002] The expansion of existing station buildings must be completed while avoiding the existing structure, and there are strict requirements for precise control of the jacking and beam lowering processes. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a construction method for expanding an existing station building.

[0004] Specifically, the construction methods for expanding existing station buildings include:

[0005] Pushing phase:

[0006] A guide beam is installed at the front end of the newly constructed station building's steel structure that is being pushed forward;

[0007] During the jacking process, the guide beam arrives at the existing platform before the newly built station building steel structure and is supported by the temporary support frame for the guide beam installed on the existing platform;

[0008] The new station building steel structure is pushed to a halt after reaching the existing platform and being supported by the temporary main structure support frame set on the existing platform.

[0009] Remove the temporary support frame for the guide beam and continue pushing until the guide beam reaches the existing station building and is supported by the guide beam support frame installed on the existing station building;

[0010] Continue pushing until the steel structure of the new station building reaches the existing station building, then remove the front section of the guide beam;

[0011] The jacking slide rail is equipped with a distance sensor at its tail end. The distance sensor is used to measure the jacking distance of the newly built station building steel structure on the slide rail. The working parameters of the power mechanism used to provide jacking force are adjusted according to the jacking distance fed back by the distance sensor.

[0012] Beam lowering stage:

[0013] A telescopic suspension column is installed on the lower surface of the steel structure of the newly built station building, and the contact wire is connected to the lower end of the telescopic suspension column; the length of the telescopic suspension column is adjustable.

[0014] A sliding track is installed on the floor truss structure of the newly built station building, and the sliding track is provided with a sliding support that is slidably connected to it;

[0015] Connect the rigid crossbeam to the sliding support;

[0016] Remove the rigid crossbeam from the original supporting structure;

[0017] The sliding support moves on the slide rail toward one side of the platform, thereby driving the rigid crossbeam to move toward one side of the platform;

[0018] The rigid crossbeam was lowered onto the platform after it was positioned above the platform.

[0019] In this project, height detection units are installed at multiple locations on the steel structure of the newly built station building; the extension length of the beam-dropping support cylinders at each location is adjusted based on the height data output by the height detection units at multiple locations.

[0020] In one embodiment, the temporary support frame for the guide beam and the temporary support frame for the main structure are erected on existing concrete columns on the existing platform.

[0021] In one embodiment, the temporary support frame for the guide beam and the temporary support frame for the main structure are connected to the existing concrete columns of the existing platform via embedded steel plates.

[0022] In one embodiment, the jacking angle is corrected by a correction cylinder on the temporary support frame of the guide beam.

[0023] In one embodiment, the newly constructed station building steel structure includes a waiting level truss, a transfer passage connected to the waiting level truss, and a skybridge structure connected to the transfer passage. The connection structures between the transfer passage and the waiting level truss, and between the transfer passage and the skybridge structure, include:

[0024] A temporary hinged seat includes a center plate and two limiting posts symmetrical about the plane of the center plate. The center plate slides on a base between the two limiting posts, and the limiting posts are fixed to the base.

[0025] A movable body is disposed between the two limiting posts, and a vertically penetrating flat groove is opened at the vertical center surface of the movable body, and the central plate is located in the flat groove;

[0026] In the connection structure between the transfer passage and the waiting level truss: the transfer passage support frame above the waiting level truss serves as the base of the temporary handover seat, and the steel beam of the transfer passage becomes the movable body;

[0027] In the connection structure between the transfer passage and the overpass structure: the overpass structure serves as the base of the temporary handover seat, and the steel beams of the transfer passage become the movable body.

[0028] In one embodiment, a sliding plate is provided at the bottom of the central plate, and the bottom of the sliding plate is a sliding layer with a low coefficient of friction;

[0029] The sliding plate is located between the two limiting posts;

[0030] The two side ends of the sliding plate extend upward to form limiting plates, the height of which is less than that of the movable body.

[0031] In one embodiment, a sliding shoe is provided on the jacking slide rail to support the steel structure of the newly built station building, and the sliding shoe slides in conjunction with the slide rail.

[0032] A pointer is installed on the sliding shoe, and a scale is installed on the slide rail;

[0033] The pointer is L-shaped, with one end mounted on the slide shoe and the other end bent toward the slide rail and close to the scale.

[0034] In one embodiment, the guide beam is disposed at the first end of the newly built station building steel structure and connects the guide beam above the newly built station building steel structure.

[0035] In one embodiment, the lower surface of the guide beam is parallel to the upper surface of the new station building steel structure, and the upper surface of the guide beam is inclined to its upper surface and the end that connects to the new station building steel structure is the highest.

[0036] In one embodiment, a sliding shoe is provided on the jacking slide rail to support the steel structure of the newly built station building, and the sliding shoe slides in conjunction with the slide rail.

[0037] The slippers are connected by flexible ropes.

[0038] The construction method for expanding an existing station building provided in this application includes a jacking stage and a beam lowering stage: In the jacking stage, a distance sensor installed at the tail end of the slide rail is used to measure the jacking distance of the new station building steel structure on the slide rail; the working parameters of the power mechanism used to provide jacking force are adjusted according to the jacking distance fed back by the distance sensor; thus improving the jacking accuracy. In the beam lowering stage, height detection units are installed at multiple locations on the new station building steel structure; the extension length of the beam lowering support cylinders at each location is adjusted according to the height data output by the height detection units at multiple locations, thereby improving the beam lowering accuracy.

[0039] For further clarity, aspects and advantages of the embodiments disclosed in this application will become apparent in the following description or may be learned by practice of the embodiments disclosed in this application. Attached Figure Description

[0040] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation on the invention.

[0041] Figure 1 This is a schematic diagram of the steel structure of the newly built station building in Embodiment 1 of this application;

[0042] Figure 2 This is a schematic diagram of the guide beam in the jacking method for expanding an existing station building provided in Embodiment 1 of this application;

[0043] Figures 3 to 7 This is a schematic diagram showing the location of the structure being pushed and the existing station building in the jacking method for expanding an existing station building provided in Embodiment 1 of this application.

[0044] Figure 8 This is a schematic diagram of the connection structure between the transfer passage and the overpass structure in Embodiment 1 of this application;

[0045] Figure 9 This is a schematic diagram of the connection structure between the transfer passage and the waiting floor truss in Embodiment 1 of this application;

[0046] Figure 10 This is a partial structural diagram of the sliding shoe and slide rail in Embodiment 1 of this application;

[0047] Figure 11 This is a partial structural diagram of the retractable suspension column in Embodiment 1 of this application;

[0048] Figure 12 This is a partial structural diagram of the method for removing the original rigid crossbeam after the construction of a new station building provided in Embodiment 1 of this application, in step S02, after the rigid crossbeam is connected to the sliding support.

[0049] Figure 13 This is a partial structural diagram of another angle after the rigid crossbeam is connected to the sliding support in S02 of the method for removing the original rigid crossbeam after the new station building is constructed, as provided in Embodiment 1 of this application.

[0050] Figure 14 This is a schematic diagram of the overall structure after the rigid crossbeam is connected to the sliding support in S02 of the method for removing the original rigid crossbeam after the construction of a new station building provided in Embodiment 1 of this application.

[0051] Figure 15 This is a schematic diagram of the overall structure of the method for removing the original rigid crossbeam after the construction of a new station building provided in Embodiment 1 of this application. The sliding support moves on the slide rail to one side of the platform, thereby driving the rigid crossbeam to move to one side of the platform. Detailed Implementation

[0052] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. Example 1

[0053] Expansion of existing station buildings can improve the operational capacity of railway lines and make travel more convenient. The expansion of existing station buildings is achieved by assembling (or temporarily assembling) the structure of the new station building and then connecting it to the existing structure through a jacking method.

[0054] This embodiment provides a construction method for expanding an existing station building, including:

[0055] Pushing phase:

[0056] A guide beam is installed at the front end of the newly constructed station building's steel structure that is being pushed forward;

[0057] In this embodiment, refer to Figure 1 The newly constructed station building steel structure 100, which is being jacked up, includes a waiting level truss 101, a transfer passage 102, a skybridge structure 103, and a transfer passage support frame 104 above the waiting level truss 101. A first guide beam 201 is installed at the front end of the waiting level truss 101; a second guide beam 202 is installed at the front end of the skybridge structure 103. The first guide beam 201 and the second guide beam 202 are located at the front end of the newly constructed station building steel structure being jacked up. During jacking, they can reach the existing structure before the new station building steel structure and be supported, reducing the deformation of the new station building steel structure and lowering the difficulty of jacking up. The first guide beam 201 and the second guide beam 202 have small mass and, by being set up as a truss structure, have a certain resistance to deformation, thereby further reducing the degree of deformation of the structure being jacked up.

[0058] Figure 1 The waiting level truss 101, transfer passage 102, skybridge structure 103, and transfer passage support frame 104 above the waiting level truss 101, as well as the first guide beam 201 and the second guide beam 202, constitute the structure that is pushed.

[0059] Pushing the button:

[0060] S1: The first guide beam 201 and the second guide beam 202 arrive at the existing platform 400 before the newly built station building steel structure 100, and are supported by the temporary support frame of the guide beam set on the existing platform 400.

[0061] In this embodiment, refer to Figure 3 A lifting cylinder 302 is installed on the temporary support frame of the guide beam. The lifting cylinder 302 can adjust the extension length of the cylinder rod according to the height of the pushed structure monitored. If the height of the pushed structure indicates that its deformation is too large, the cylinder rod of the lifting cylinder 302 will extend upward to support the guide beam and reduce the deformation.

[0062] S2: The new station building steel structure 100 reaches the existing platform 400 and is supported by the temporary main structure support frame set on the existing platform 400, after which the jacking is paused. Figure 3 As shown;

[0063] In this embodiment, refer to Figure 3 A sliding cylinder 301 is installed on the temporary support frame of the main structure. The sliding cylinder 301 can adjust the extension length of the cylinder rod according to the height of the pushed structure monitored. If the height of the pushed structure indicates that its deformation is too large, the cylinder rod of the sliding cylinder 301 will extend upward to support the steel structure 100 of the new station building, thereby reducing the deformation.

[0064] S3: Remove the temporary support frame for the guide beam, as follows: Figure 4 As shown; continue pushing, during which the two sliding cylinders 301 provide alternating support and their positions change along the pushing direction, as follows. Figures 5 to 7 As shown, the first guide beam 201 and the second guide beam 202 reach the existing station building 500, and the first guide beam 201 is supported by the guide beam support frame 501 installed on the existing station building 500;

[0065] S4: Continue pushing until the newly built station building steel structure 100 reaches the existing station building 500, then remove the front sections of the first guide beam 201 and the second guide beam 202;

[0066] The jacking slide rail is equipped with a distance sensor at its tail end. The distance sensor is used to measure the jacking distance of the newly built station building steel structure on the slide rail. The working parameters of the power mechanism used to provide jacking force are adjusted according to the jacking distance fed back by the distance sensor.

[0067] The system employs both manual measurement and a real-time monitoring system for the jacking operation using the aforementioned distance sensor to precisely control the jacking synchronization and eliminate accumulated errors. If asynchronous lateral displacement exceeds the limit during the jacking process, the computer uses the pump station to adjust the oil pressure to actively correct the jacking cylinder.

[0068] For the newly constructed station steel structure in this embodiment, it will be jacked up using multiple parallel sliding rails. The distance sensor can be a laser rangefinder, which is fixedly installed at the end of each sliding rail to measure the jacking distance of the structure on each rail. The distance measured is the total jacking distance. The main function of the laser rangefinder is to measure the jacking distance of the structure on each axis during the jacking process; the obtained measurement data is used to verify whether the jacking distances of the structures on each sliding rail are consistent and synchronized. The measurement data will be automatically uploaded to the computer terminal in real time. If inconsistencies or deviations occur in the measured data across different axes, the computer terminal will automatically adjust the oil pressure of the hydraulic pump station to correct the deviation.

[0069] The temporary support frame for the guide beam and the temporary support frame for the main structure are erected on existing concrete columns on the existing platform 400. Therefore, the jacking method in this embodiment utilizes the existing concrete columns on the existing platform 400. The temporary support frame for the guide beam and the temporary support frame for the main structure are erected on these existing concrete columns. The lifting cylinder 302 on the temporary support frame for the guide beam and the sliding cylinder 301 on the temporary support frame for the main structure support lift the guide beam and the newly built station building steel structure during the jacking stroke, reducing deformation and improving jacking accuracy. By cleverly utilizing the existing structure, the amount of work is saved and time is reduced, representing a significant improvement.

[0070] This application claims priority to patent application CN 116220368A. In

[0041] of the publication text of that application, it is described that "the temporary sliding support for platform II2 adopts a stepped lattice support frame 20, which includes a structural truss sliding platform 23 and a guide beam temporary support pier 22. The structural truss sliding platform 23 adopts a double-I-beam platform. A structural truss fixed sliding shoe 13, jacks 18, limit rods 21, and a guide beam temporary support pier 22 are installed on the upper part of the structural truss sliding platform 23. The guide beam temporary support pier 22 is installed on the structural truss sliding platform 23. A guide beam fixed sliding shoe support 24 is installed on the upper part of the guide beam temporary support pier 22. A guide beam fixed sliding shoe 12 is installed on the top of the guide beam fixed sliding shoe support 24 to ensure that the elevation of the guide beam fixed sliding shoe 12 on the upper part of the guide beam temporary support pier 22 is consistent with the elevation of the lower chord of the guide beam 9 structure."

[0071] Platform II2 is the existing platform 400 mentioned in this application;

[0072] The structural truss sliding platform 23 is the temporary support frame for the main structure described in this application;

[0073] The temporary support pier 22 for the guide beam is the temporary support frame for the guide beam described in this application.

[0074] In this embodiment, the existing platform 400 is further utilized during the construction of the temporary support frame for the guide beam and the temporary support frame for the main structure. The temporary support frame for the guide beam and the temporary support frame for the main structure are connected to the existing concrete columns of the existing platform 400 via embedded steel plates. In this technical solution, the temporary support frame for the guide beam and the temporary support frame for the main structure can increase stability by connecting to the embedded steel plates of the existing concrete columns, while the existing concrete columns can also be supported and reinforced by the temporary support frame for the guide beam and the temporary support frame for the main structure.

[0075] Furthermore, S1, S2, S3 and S4 can be spaced out over a relatively long period of time, and do not need to be partially or fully completed within a single window period. Therefore, the requirement for the duration of the window period is low, which further improves the applicability of the jacking method provided in this embodiment and makes the expansion of existing stations more feasible.

[0076] In this embodiment, refer to Figures 1 to 7 A first guide beam 201 is installed at the beginning of the new station building steel structure 100 and connected above the new station building steel structure 100. With this technical solution, the guide beam support frame 501 on the existing station building 500 can support the first guide beam 201, and after the jacking is completed, the guide beam support frame 501 can serve as support during the beam lowering stage.

[0077] In this embodiment, the lower surface of the first guide beam 201 is parallel to the upper surface of the newly built station building steel structure 100, and the upper surface of the first guide beam 201 is inclined to its upper surface, with the highest point being the end that connects to the newly built station building steel structure 100. (Refer to...) Figure 2 The upper surface of the first guide beam 201 is inclined downward at the front end, which helps to reduce the weight of the first guide beam 201, thereby maintaining its rigidity and improving the jacking accuracy.

[0078] In this embodiment, the existing platform 400 is further utilized during the construction of the temporary support frame for the guide beam and the temporary support frame for the main structure. The temporary support frame for the guide beam and the temporary support frame for the main structure are connected to the existing concrete columns of the existing platform 400 via embedded steel plates. In this technical solution, the temporary support frame for the guide beam and the temporary support frame for the main structure can increase stability by connecting to the embedded steel plates of the existing concrete columns, while the existing concrete columns can also be supported and reinforced by the temporary support frame for the guide beam and the temporary support frame for the main structure.

[0079] In this embodiment, the correction cylinder on the temporary support frame of the guide beam can provide a force perpendicular to the jacking direction to the guide beam, correct the jacking angle midway, and more timely and effectively correct the deviation from the jacking direction.

[0080] Reference Figure 1The newly constructed station building steel structure includes a waiting level truss 101, a transfer passage 102 connected to the waiting level truss 101, and a skybridge structure 103 connected to the transfer passage 102. When jacking such a large-span structure, problems such as excessive pressure and abnormal alarms in the jacking hydraulic system occur. By monitoring and analyzing the jacking data from multiple points, the inventors of this application discovered deviations in the jacking distances at different points, indicating that the overall structure was not jacked synchronously. Further investigation revealed that when these structures are connected by completely fixed connections, the asynchronous jacking can cause the structure to jam, thus triggering the aforementioned alarm in the hydraulic system. The construction method provided in this embodiment can solve the above problems.

[0081] Specifically, in the steel structure of the newly built station building, the connection structure between the transfer passage 102 and the waiting floor truss 101 refers to... Figure 9 ,Include:

[0082] The temporary hinged seat includes a central plate 11 and two limiting posts 12 symmetrical about the plane of the central plate 11. The central plate 11 slides between the two limiting posts 12 on the base (the transfer passage support frame 104 above the waiting floor truss 101 is said base). The limiting posts 12 are fixed on the transfer passage support frame 104.

[0083] The movable body (the steel beam of the transfer passage 102 is the movable body) is located between two limiting columns 12, and a vertically penetrating flat groove 2 is opened at the vertical center surface of the steel beam of the transfer passage 102, and the center plate 11 is located in the flat groove 2.

[0084] The connection structure between transfer passage 102 and overpass structure 103 is as follows: Figure 8 ,Include:

[0085] The temporary hinge seat includes a center plate 11 and two limiting posts 12 symmetrical about the plane of the center plate 11. The center plate 11 slides on the base (the sky bridge structure 103 is the base) between the two limiting posts 12, and the limiting posts 12 are fixed to the sky bridge structure 103.

[0086] The movable body (the steel beam of the transfer passage 102 is the movable body) is located between two limiting columns 12, and a vertically penetrating flat groove 2 is opened at the vertical center surface of the steel beam of the transfer passage 102, and the center plate 11 is located in the flat groove 2.

[0087] In this embodiment, the position of the movable body (the steel beam of the transfer passage 102 is the movable body) is allowed to move between the limiting posts 12 of the temporary hinge seat, and the position of the movable body (the steel beam of the transfer passage 102 is the movable body) is also allowed to move along the center plate 11. Figure 8 and Figure 9The vertical direction is defined in the middle. While restricting the relative positions of the waiting floor truss 101, transfer passage 102, and skybridge structure 103 within the newly constructed station building steel structure, it also allows for a range of movement in certain directions. Therefore, while jacking the entire newly constructed station building steel structure, it avoids structural deformation and stress concentration caused by factors such as different jacking distances, temperature changes, and earthquakes, which could lead to jamming. This ensures that the large-span newly constructed station building steel structure is successfully jacked to the target position during large jacking displacements.

[0088] In this embodiment, refer to Figure 8 A sliding plate 3 is provided at the bottom of the central plate 11. The bottom of the sliding plate 3 is a sliding layer with a low coefficient of friction, such as a polytetrafluoroethylene (PTFE) pad. The sliding plate 3 is located between the two limiting posts 12. Furthermore, the friction of the sliding surface is used to bear the load of the structure and allows the structure to interact horizontally.

[0089] In this embodiment, we continue to refer to... Figure 8 The width of the sliding plate 3 is greater than the width of the steel beam of the transfer passage 102. Guided by the sliding plate 3 extending a certain distance below, and with its greater width, this structure allows for a certain range of rotation if the steel beam of the transfer passage 102 is out of sync with the other two structures, further preventing jamming.

[0090] In this embodiment, we continue to refer to... Figure 8 The two side ends of the sliding plate 8 extend upward to form a limiting plate 1, which can prevent excessive stiffness deformation while ensuring a certain degree of freedom. Furthermore, the height of the limiting plate 1 is less than that of the movable body (102), thus avoiding interference.

[0091] In this embodiment, we continue to refer to... Figure 8 The movable body (102) is higher than the sliding plate 3, and a first support rib 4 and a second support rib 6, as well as a reinforcing rib 5, are provided between the movable body (102) and the sliding plate 3 on the central plate 11.

[0092] The first support rib 4 and the second support rib 6 are used to support the movable body (102).

[0093] The reinforcing rib 5 is used to increase the strength and rigidity of the center plate 11.

[0094] In this embodiment, refer to Figure 10 The jacking system includes a sliding shoe 15 that supports the steel structure of the newly built station building, and the sliding shoe 15 is slidably engaged with the slide rail 14;

[0095] A pointer 13 is set on the slide shoe 15, and a scale is set on the slide rail 14;

[0096] The pointer 13 is L-shaped, with one end mounted on the slide shoe 15 and the other end bent toward the slide rail 14 and close to the scale.

[0097] Pointer 13 is used to read the jacking distance of the structure on each slide rail 14, and can also be used to check whether each axis is synchronized. One worker is assigned to each slide rail 14 to record the readings and report the data in real time via walkie-talkie. With this implementation, accurate readings can be obtained quickly without the need for on-site use and proper placement of measuring tools.

[0098] Each slide rail 14 is equipped with several sliding shoes 15 to support the steel structure of the newly built station building. In this embodiment, the sliding shoes 15 on the same slide rail 14 are connected in series by flexible ropes. During the jacking process, the front sliding shoe will detach from the slide rail. Because it is connected to the rear sliding shoe by the flexible rope, the front sliding shoe will be pulled down slowly to the ground by the flexible rope, instead of falling freely to the ground, thus avoiding noise and potential danger.

[0099] During the expansion of the existing station building, the steel structure of the new station building has been pushed to the design position. The next step is to gradually lower the steel structure of the new station building to the design height. This process of lowering is called beam lowering.

[0100] Beam lowering stage:

[0101] 1) Determine the location of the measuring point based on the finite element calculation results.

[0102] 2) Collect stress data of the monitored structure during the jacking and beam lowering process, compare it with the construction simulation calculation results, and issue an early warning when the collected stress data is abnormal;

[0103] 3) Install telescopic suspension columns on the lower surface of the steel structure of the newly built station building, and connect the contact wire to the lower end of the telescopic suspension columns;

[0104] The length of the telescopic suspension column is adjustable.

[0105] 4) After the beam is lowered, the original rigid crossbeam is removed:

[0106] A sliding track is installed on the floor truss structure of the newly built station building, and the sliding track is provided with a sliding support that is slidably connected to it;

[0107] Connect the rigid crossbeam to the sliding support;

[0108] Remove the rigid crossbeam from the original supporting structure;

[0109] The sliding support moves on the slide rail toward one side of the platform, thereby driving the rigid crossbeam to move toward one side of the platform;

[0110] The rigid crossbeam was lowered onto the platform after being positioned above it.

[0111] In this project, height detection units are installed at multiple locations on the steel structure of the newly built station building; the extension length of the beam-dropping support cylinders at each location is adjusted based on the height data output by the height detection units at multiple locations.

[0112] During the beam lowering process, the height data output by the height detection units at multiple locations will be automatically uploaded to the computer terminal in real time. If the measured data from each height detection unit is inconsistent or deviates, the computer terminal will automatically adjust the oil pressure of the hydraulic pump station to correct and adjust the extension length of the beam lowering support cylinder at each location.

[0113] In this embodiment, before the lowering of the beams of the new station building steel structure 100 begins: a retractable suspension column is installed on the lower surface of the new station building steel structure 100, and the contact wire is connected to the lower end of the retractable suspension column. Completing the installation of the retractable suspension column before the lowering of the beams of the new station building steel structure 100 avoids occupying time during the window period.

[0114] Before the lowering of the steel structure 100 of the new station building, the length of the retractable suspension column is at its maximum. After lowering the beam to a height H1 within a window period, the length of the retractable suspension column is shortened by H1; after lowering the beam to a height H2 within a subsequent window period, the length of the retractable suspension column is shortened by H2 again. This embodiment is only one implementation method, completing the beam lowering in two stages. In actual work, the specific method will be determined based on the actual working conditions.

[0115] In this embodiment, see Figure 11 600mm retractable bollard, including:

[0116] The fixed section 601 includes a first end and a second end. The first end of the fixed section 601 is fixedly connected to the floor truss structure of the newly built station building.

[0117] The movable segment 602 includes a first end and a second end. The first end of the movable segment 602 is connected to the second end of the fixed segment 601, and the second end of the movable segment 602 is connected to the contact wire.

[0118] The length of the telescopic column can be adjusted by changing the distance between the first end of the fixed section 601 and the second end of the movable section 602.

[0119] The construction method provided in this embodiment eliminates the need to disassemble the hanging columns during the beam lowering process. Only the length of the telescopic hanging columns needs to be adjusted to adapt to the 100mm height of the newly built station building steel structure at different beam lowering stages. This method is highly efficient and has low cost for the hanging columns themselves.

[0120] The rigid crossbeam is the supporting structure for the overhead contact line. In the expansion project of the existing station building, after the floor truss structure 4 of the new station building is pushed and the beams are lowered, the rigid crossbeam 2 that previously supported the overhead contact line needs to be removed.

[0121] Specifically, the demolition methods include:

[0122] S01: Install slide rail 3 on the floor truss structure 4 of the newly built station building. Slide rail 3 is provided with sliding support 1 that is slidably connected to it.

[0123] S02: Connect the rigid crossbeam 700 to the sliding support 17, refer to... Figures 12 to 14 ;

[0124] S03: Remove the rigid crossbeam 700 from the original supporting structure;

[0125] S04: The sliding support 17 moves towards one side platform 400 on the slide rail 16, thereby driving the rigid crossbeam 700 to move towards one side platform 400, as shown in the reference. Figure 15 ;

[0126] S05: The rigid crossbeam 700 is located above platform 400 and then lowered onto platform 400.

[0127] In this embodiment, a slide rail 16 is installed above the floor truss structure 101 of the newly built station building, with at least one end of the slide rail 16 extending beyond the rigid crossbeam 700. Installing the slide rail 16 above the floor truss structure 101 of the newly built station building provides a large operating space.

[0128] In this embodiment, a chain hoist is used to connect the rigid crossbeam 700 to the sliding support 17;

[0129] After the rigid crossbeam is positioned above the platform, the chain hoist and pulley system are used to lower it down to the platform.

[0130] Chain hoists utilize the principle of wheel and axle to save effort, making them a simple and portable manual lifting tool. Pulley blocks are also easy to install and operate, offering labor-saving and high efficiency. This embodiment utilizes both tools to move the rigid crossbeam 700, further improving dismantling efficiency.

[0131] In this embodiment, the rigid beam 700 comprises multiple rigid beam units (21, 22, and 23), which are connected by bolts. For this type of rigid beam structure:

[0132] Each section of rigid crossbeam unit slides out ( Figure 15 After the rigid crossbeam unit 21 in the middle reaches above the platform 400, loosen the bolts connected to it;

[0133] The rigid crossbeam unit 21 is lowered onto platform 400.

[0134] For rigid crossbeams that are integral structures, after a portion of the crossbeam is located above platform 400, this portion of the rigid crossbeam can be cut off and then lowered to platform 400 using a pulley system.

[0135] This embodiment utilizes the positional relationship between the floor truss structure and the rigid beam of the newly built station building. A slide rail is installed on the floor truss structure of the newly built station building. After the rigid beam is connected to the sliding support on the slide rail, the rigid beam is transferred to one side of the platform by sliding and hoisting. After the rigid beam is located above the platform, it is lowered onto the platform to complete the dismantling. The dismantling process is efficient and safer to operate.

[0136] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this technical solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this technical solution.

[0137] In this technical solution, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this technical solution according to the specific circumstances.

[0138] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present technical solution. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0139] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A construction method for expanding an existing station building, characterized in that, Include: Pushing phase: A guide beam is installed at the front end of the newly constructed station building's steel structure that is being pushed forward; During the jacking process, the guide beam arrives at the existing platform before the newly built station building steel structure and is supported by the temporary support frame for the guide beam installed on the existing platform; The new station building steel structure is pushed to a halt after reaching the existing platform and being supported by the temporary main structure support frame set on the existing platform. Remove the temporary support frame for the guide beam and continue pushing until the guide beam reaches the existing station building and is supported by the guide beam support frame installed on the existing station building; Continue pushing until the steel structure of the new station building reaches the existing station building, then remove the front section of the guide beam; The jacking slide rail is equipped with a distance sensor at its tail end. The distance sensor is used to measure the jacking distance of the newly built station building steel structure on the slide rail. The working parameters of the power mechanism used to provide jacking force are adjusted according to the jacking distance fed back by the distance sensor. Beam lowering stage: A telescopic suspension column is installed on the lower surface of the steel structure of the newly built station building, and the contact wire is connected to the lower end of the telescopic suspension column; the length of the telescopic suspension column is adjustable. A sliding track is installed on the floor truss structure of the newly built station building, and the sliding track is provided with a sliding support that is slidably connected to it; Connect the rigid crossbeam to the sliding support; Remove the rigid crossbeam from the original supporting structure; The sliding support moves on the slide rail toward one side of the platform, thereby driving the rigid crossbeam to move toward one side of the platform; The rigid crossbeam was lowered onto the platform after it was positioned above the platform. In this process, height detection units are installed at multiple locations on the steel structure of the newly built station building; the extension length of the beam-dropping support cylinders at each location is adjusted based on the height data output by the height detection units at multiple locations. The steel structure of the newly built station building includes a waiting level truss, a transfer passage connected to the waiting level truss, and a skybridge structure connected to the transfer passage. The connection structures between the transfer passage and the waiting level truss, and between the transfer passage and the skybridge structure, include: A temporary hinged seat includes a center plate and two limiting posts symmetrical about the plane of the center plate. The center plate slides on a base between the two limiting posts, and the limiting posts are fixed to the base. A movable body is disposed between the two limiting posts, and a vertically penetrating flat groove is opened at the vertical center surface of the movable body, and the central plate is located in the flat groove; In the connection structure between the transfer passage and the waiting level truss: the transfer passage support frame above the waiting level truss serves as the base of the temporary hinge seat, and the steel beam of the transfer passage becomes the movable body; In the connection structure between the transfer passage and the overpass structure: the overpass structure serves as the base of the temporary hinged seat, and the steel beam of the transfer passage becomes the movable body.

2. The construction method according to claim 1, characterized in that, The temporary support frame for the guide beam and the temporary support frame for the main structure are erected on the existing concrete columns on the existing platform.

3. The construction method according to claim 2, characterized in that, The temporary support frame for the guide beam and the temporary support frame for the main structure are connected to the existing concrete columns of the existing platform through pre-embedded steel plates.

4. The construction method according to claim 1, characterized in that, The jacking angle is corrected by the correction cylinder on the temporary support frame of the guide beam.

5. The construction method according to claim 1, characterized in that, A sliding plate is provided at the bottom of the central plate, and the bottom of the sliding plate is a sliding layer with a low coefficient of friction; The sliding plate is located between the two limiting posts; The two side ends of the sliding plate extend upward to form limiting plates, the height of which is less than that of the movable body.

6. The construction method according to claim 1, characterized in that, A sliding shoe is installed on the jacking slide rail to support the steel structure of the newly built station building, and the sliding shoe slides in conjunction with the slide rail. A pointer is installed on the sliding shoe, and a scale is installed on the slide rail; The pointer is L-shaped, with one end mounted on the slide shoe and the other end bent toward the slide rail and close to the scale.

7. The construction method according to claim 1, characterized in that, The guide beam is installed at the beginning of the steel structure of the new station building and connects the guide beam to the top of the steel structure of the new station building.

8. The construction method according to claim 1, characterized in that, The lower surface of the guide beam is parallel to the upper surface of the new station building steel structure, and the upper surface of the guide beam is inclined to its upper surface, with the end that connects to the new station building steel structure being the highest.

9. The construction method according to claim 1, characterized in that, A sliding shoe is installed on the jacking slide rail to support the steel structure of the newly built station building, and the sliding shoe slides in conjunction with the slide rail. The slippers are connected by flexible ropes.

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