Track plate buoyancy monitoring device
By designing a track plate buoyancy monitoring device during self-contained concrete pouring of CRTSⅢ type plate ballastless tracks, the problems of vertical displacement and stress concentration caused by the buoyancy of the track plate are solved, and the uniform force and construction quality of the track plate are guaranteed.
Patent Information
- Application Number
- CN202421360497.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-06-14
AI Technical Summary
During the self-contained concrete pouring of CRTSⅢ type plate ball-free tracks, the track plates are subjected to buoyancy, resulting in vertical displacement. The buckle pressure applied to the existing limit workpiece is unclear, which can easily lead to stress concentration and structural damage.
A rail plate buoyancy monitoring device is designed, including a limit beam and a tension monitoring device. By setting a tensile monitoring device at both ends of the limit beam and a pressure monitoring device on both sides of the track plate, the buoyancy changes of the track plate are monitored in real time.
Accurate monitoring of the buoyancy changes of the track plate during self-contained concrete pouring process is achieved, ensuring uniform stress on the track plate, avoiding stress concentration and structural damage, and providing a basis for optimizing the limit tooling structure and ensuring construction quality.
Smart Images
Figure CN222847141U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of rail transportation, in particular to a buoyancy monitoring device for a track plate during the pouring process of self-compacting concrete of a CRTSⅢ type slab ballastless track. Background Art
[0002] The CRTSⅢ slab track structure includes a concrete base plate, a self-compacting concrete filling layer and a pre-supported track plate from bottom to top. In the track plate construction, the self-compacting concrete needs to be poured continuously at one time. The self-compacting concrete is injected from the grouting hole in the middle of the track plate to form a self-compacting concrete filling layer under the track plate. During the concrete pouring process, the track plate is gradually affected by buoyancy, resulting in a certain vertical displacement of the track plate. Therefore, during the pouring of self-compacting concrete, it is necessary to use a buckling limit fixture to constrain the displacement of the track plate to prevent the large floating deformation of the track plate from having an adverse effect on the subsequent track laying construction.
[0003] The traditional track plate buckling and limiting fixture uses multiple limiting devices across the track plate, and the limiting fixture applies a vertical downward buckling force to the track plate to limit the upward deformation of the track plate. During application, a certain buckling force is applied to the buckling fixture through a torque wrench, but the specific value of the buckling force is not clear, and the uniformity of the buckling force applied by each buckling fixture is unknown. In actual construction, in order to ensure that the upward deformation of the track plate meets the requirements, operators often use empirical methods to apply excessive buckling pressure to the track plate, which often causes local stress concentration in the track plate. In severe cases, it causes the limit groove of the base plate to crack and break, and the edge of the track plate is damaged and falls off. Therefore, in order to clarify the stress state of the track plate during the track plate laying construction and ensure that the track plate is evenly stressed, it is necessary to invent a track plate buoyancy monitoring device during the pouring of self-compacting concrete, so as to provide a basis and guidance for optimizing the structure of the new limiting fixture and ensuring the construction quality of the track plate. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a buoyancy monitoring device for a track plate during the pouring of self-compacting concrete for a CRTSⅢ type slab ballastless track, so as to realize accurate measurement of the buoyancy exerted on the CRTSⅢ type ballastless track plate during the pouring of self-compacting concrete.
[0005] In view of the above problems, the technical solution proposed by the utility model is: a track plate buoyancy monitoring device, including a limit beam, the limit beam spans the track plate, and tension monitoring devices are arranged at both ends of the limit beam, and the lower end of the tension monitoring device is fixedly connected to the base plate.
[0006] Preferably, the tension monitoring device includes an upper screw, a lower screw and a tension sensor, both ends of the tension sensor are provided with internal threaded holes, the lower end of the upper screw is tightened into the internal threaded hole at the upper end of the tension sensor, and the upper end of the lower screw is tightened into the internal threaded hole at the lower end of the tension sensor.
[0007] Preferably, the tension monitoring device also includes a limiting nut, a mounting hole penetrating the limiting beam is opened on the limiting beam, the upper end of the upper screw rod passes through the mounting hole, and the limiting nut is installed at the position where the upper end of the upper screw rod extends out of the mounting hole of the limiting beam.
[0008] Preferably, the upper screw, lower screw and tension sensor are all arranged in the vertical direction, and the center lines of the upper screw and the lower screw are on the same straight line. A circular ring is provided at the lower end of the lower screw, and a transverse limit hole is provided at a corresponding position in the base plate. The steel bar passes through the circular ring at the lower end of the lower screw and the transverse limit hole of the base plate.
[0009] Preferably, a pressure monitoring device is also included, which includes a fine-adjusting device and a pressure sensor. Fine-adjusting devices are arranged on both sides of the track plate, a base plate is arranged under the track plate, and a pressure sensor is arranged between each fine-adjusting device and the base plate.
[0010] Preferably, a tension monitoring device is provided at each end of the limit beam to form a group of tension monitoring devices, and at least 5 groups of tension monitoring devices are installed on one track plate; a pressure monitoring device is provided at each relative position on both sides of the track plate to form a group of pressure monitoring devices, and 2 to 3 groups of pressure monitoring devices are installed on one track plate.
[0011] The beneficial technical effect of the utility model is as follows: the limit beam spans the track plate, tension monitoring devices are provided at both ends of the limit beam, and pressure monitoring devices are provided at the fine adjustment devices on both sides of the track plate. With the help of the limit beam and the tension monitoring device, the track plate is limited and constrained during the pouring of self-compacting concrete. At the same time, the buoyancy changes of the track plate during the construction process can be monitored in real time in combination with the tension monitoring device and the pressure monitoring device. The monitoring device has a simple structure and is easy to assemble and disassemble. It can be improved based on the existing buckling limit tooling. The device can accurately obtain the stress state of the track plate during the pouring of self-compacting concrete, and can also provide a basis and guidance for the optimization of the design of the new limit tooling structure and to ensure the construction quality of the track plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the overall installation during construction in Example 1;
[0013] Figure 2 This is a schematic diagram of the installation of the tension monitoring device during construction in Example 1;
[0014] Figure 3This is a schematic diagram of the installation of the pressure monitoring device during construction in Example 1;
[0015] In the figure: a limit beam 11, an upper screw rod 12, a lower screw rod 13, a limit nut 14, a tension sensor 15, a track plate 2, a fine adjustment device 3, a grouting hole 4, a base plate 5, a side formwork 6, a self-compacting concrete filling layer 7, steel bars 8, and a pressure sensor 9. DETAILED DESCRIPTION
[0016] The present invention will be further described below in conjunction with the embodiments and drawings:
[0017] The CRTSⅢ slab track structure includes a concrete base plate 5, a self-compacting concrete filling layer 7 and a track plate 2 from bottom to top. During construction, the track plate 2 is laid on the base plate 5, and the side formwork 6 is used to surround the track plate 2. The self-compacting concrete is injected from the grouting hole 4 of the track plate 2. At this time, the side formwork 6 seals the space for the self-compacting concrete to flow, and the self-compacting concrete will form a self-compacting concrete filling layer 7 between the track plate 2, the base plate 5 and the side formwork 6. The track plate 2 gradually rises under the buoyancy of the self-compacting concrete. When the track plate 2 rises to the required height, it is necessary to limit the track plate 2 with a limiting device to prevent the track plate 2 from continuing to float and deform. In order to prevent the track plate 2 from causing adverse effects on the limiting device and the base plate 5 under the buoyancy of the self-compacting concrete during the pouring of the self-compacting concrete, it is necessary to clarify the law of the change in the buoyancy value of the track plate 2 during the pouring of the self-compacting concrete. Embodiment 1
[0018] like Figure 1 , Figure 2 and Figure 3 As shown, in order to clarify the specific value of the floating effect on the track plate 2 during the pouring of self-compacting concrete, the limit device includes a limit beam 11 and a tension monitoring device. The tension monitoring device is arranged at both ends of the limit beam 11, and a pressure sensor 9 is arranged between the fine adjustment device 3 and the base plate 5.
[0019] The tension monitoring device includes an upper screw rod 12, a lower screw rod 13, a limit nut 14 and a tension sensor 15, and both ends of the tension sensor 15 are provided with internal threaded holes. The upper screw rod 12 and the lower screw rod 13 are both threadedly connected to the tension sensor 15, the lower end of the upper screw rod 12 is tightened in the internal threaded hole at the upper end of the tension sensor 15, and the upper end of the lower screw rod 13 is tightened in the internal threaded hole at the lower end of the tension sensor 15. A circular ring is also integrally formed at the bottom of the lower screw rod 13, and one end of the steel bar 8 passes through the circular ring at the bottom of the lower screw rod 13 and is inserted into the base plate 5, thereby stabilizing the entire tension monitoring device. A mounting hole that passes through the limiting beam 11 is provided on the limiting beam 11, and the upper end of the upper screw rod 12 passes through the mounting hole.
[0020] In order to restrain the upward deformation of the track plate 2 during the pouring of the self-compacting concrete, a limiting beam 11 is required to limit the vertical position of the track plate 2. Figure 2 As shown, in this embodiment, a limiting nut 14 is installed at a position where the upper end of the upper screw rod 12 extends out of the mounting hole of the limiting beam 11, and the limiting nut 14 is screwed so that the limiting nut 14 and the limiting beam 11 are pressed against each other, thereby limiting the position of the limiting beam 11.
[0021] Since the direction of the concrete floating effect on the track plate 2 is vertically upward, in order to accurately monitor the vertical upward pressure on the limit beam 11, the upper screw 12, the lower screw 13 and the tension sensor 15 are all arranged in the vertical direction, and the center lines of the upper screw 12 and the lower screw 13 are on the same straight line. In order to allow the tension monitoring device to maintain a stable state when the limit device is subjected to the vertical upward pressure of the track plate 2, in this embodiment, a circular ring is set at the lower end of the lower screw 13, and a transverse limiting hole is set at the corresponding position in the base plate 5. The steel bar 8 passes through the circular ring at the lower end of the lower screw and the transverse limiting hole of the base plate to ensure that the lower end of the lower screw 13 will not loosen during the construction process.
[0022] In this embodiment, there are two ways to transmit data of the pressure sensor 9 and the tension sensor 15. One way is to connect to the data collector through a wire, and then connect to the host computer through a wire for on-site real-time monitoring and storage. The other way is to connect to the centralized processing unit in the form of a wire, and the centralized processing unit can wirelessly transmit data to the data coordinator in the form of a private protocol, and the coordinator transmits the data to the host computer through a local area network, thereby realizing remote real-time monitoring and storage.
[0023] like Figure 1 and Figure 3 As shown, the pressure monitoring device includes a fine adjustment device 3 and a pressure sensor 9. The fine adjustment devices 3 are arranged on both sides of the track plate 2, and a base plate 5 is arranged below the track plate 2. A pressure sensor 9 is arranged between each fine adjustment device 3 and the base plate 5. In order to make the force of each tension sensor 15 and pressure sensor 9 controllable and readable, in this embodiment, a tension monitoring device is arranged at each end of the limit beam 11 as a group of tension monitoring devices, and at least 5 groups of tension monitoring devices are installed on one track plate 2.
[0024] like Figures 1 to 3As shown, in this embodiment, the specific process of monitoring the buoyancy of the track plate 2 during construction is as follows: after the track plate 2 is fine-tuned, the values measured by the pressure sensors 9 under all the fine-tuning devices 3 are added together to obtain the deadweight of the track plate 2. Subsequently, a certain amount of buckling pressure is applied to the track plate 2 by adjusting the limit nut 14. The specific buckling pressure value is the sum of the readings of all the pull rod sensors. At this time, the deadweight of the track plate 2, the tension of the limit device and the pressure of the fine-tuning device 3 can all be determined. When the self-compacting concrete under the track plate 2 begins to be poured, the track plate 2 will float and deform under the action of the self-compacting concrete. At this time, the real-time change of the buoyancy applied by the self-compacting concrete to the track plate 2 can be determined by calculating the deadweight of the track plate 2, the tension of the limit device and the pressure of the fine-tuning device 3. After clarifying the change law of the buoyancy applied by the self-compacting concrete to the track plate 2 during the pouring of the self-compacting concrete, and combining it with the displacement deviation of the track plate 2 measured later, it can provide a reference for the value of the torque applied to the limit device in the specific construction, and also provide data support for the structural optimization design of the limit tooling.
[0025] Obviously, without departing from the principle of the present invention, several improvements or modifications made should be regarded as within the protection scope of the present invention.
Claims
1. A track plate buoyancy monitoring device, characterized in that: It includes a limit beam, which spans the track plate. Tension monitoring devices are arranged at both ends of the limit beam, and the lower end of the tension monitoring device is fixedly connected to the base plate; the tension monitoring device includes an upper screw rod, a lower screw rod and a tension sensor, and internal threaded holes are opened at both ends of the tension sensor. The lower end of the upper screw rod is tightened in the internal threaded hole at the upper end of the tension sensor, and the upper end of the lower screw rod is tightened in the internal threaded hole at the lower end of the tension sensor.
2. A track plate buoyancy monitoring device according to claim 1, characterized in that: The tension monitoring device also includes a limiting nut. The limiting beam is provided with a mounting hole that passes through the limiting beam. The upper end of the upper screw passes through the mounting hole. The limiting nut is installed at the position where the upper end of the upper screw extends out of the mounting hole of the limiting beam.
3. A track plate buoyancy monitoring device according to claim 2, characterized in that: The upper screw rod, the lower screw rod and the tension sensor are all arranged in the vertical direction, and the center lines of the upper screw rod and the lower screw rod are on the same straight line. A circular ring is arranged at the lower end of the lower screw rod, and a transverse limit hole is arranged at the corresponding position in the base plate. The steel bar passes through the circular ring at the lower end of the lower screw rod and the transverse limit hole of the base plate.
4. A track plate buoyancy monitoring device according to claim 3, characterized in that: It also includes a pressure monitoring device, which includes a fine-adjusting device and a pressure sensor. The fine-adjusting devices are arranged on both sides of the track plate, a base plate is arranged under the track plate, and a pressure sensor is arranged between each fine-adjusting device and the base plate.
5. A track plate buoyancy monitoring device according to claim 4, characterized in that: A tension monitoring device is set at each end of the limit beam to form a group of tension monitoring devices, and at least 5 groups of tension monitoring devices are installed on a track plate; a pressure monitoring device is set at each relative position on both sides of the track plate to form a group of pressure monitoring devices, and 2 groups of pressure monitoring devices are installed on a track plate.