Quickly-assembled point vibration isolation ballast bed system

Abstract

A quick-mounting point vibration isolation ballast bed system at least comprises a prefabricated ballast bed plate and a stepless height adjusting device, limiting boss U-shaped grooves are formed in the two ends of the prefabricated ballast bed plate so that limiting bosses can be poured after mounting is completed, and two rows of rail bearing tables which are sequentially arranged at intervals are arranged on the top face of the prefabricated ballast bed plate; the prefabricated roadbed slab is of a prefabricated reinforced concrete cuboid structure, a plurality of rubber spring vibration isolators are arranged on the bottom face of the prefabricated roadbed slab, a stepless height adjusting device is arranged at the bottom of each rubber spring vibration isolator, and the rubber spring vibration isolators are fixed through embedded flange assemblies poured into the prefabricated roadbed slab. Therefore, the vibration reduction track structure system overcomes various defects of an existing vibration reduction track structure system, the height adjusting precision and flexibility are higher, the construction difficulty is lowered, the height adjusting cost and the construction procedures need to be greatly simplified, the vibration reduction performance of a track bed is effectively adjusted, and the application is more flexible and wider.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration reduction and noise reduction of rail transit, in particular to a quick-install point isolation vibration damping track bed system. Background Art

[0002] With the large-scale popularization and development of urban rail transit, the construction period of urban rail transit is becoming increasingly tight, and the construction period pressure is prominent. Generally, the track laying period of a subway line is often compressed to half a year or even shorter. For the existing traditional track structure types, there are many construction operation links, it is not easy to control the construction accuracy, and the construction progress is slow. Under the condition that the overall construction period and the track laying period are compressed, it seriously affects the construction accuracy and the track laying quality, resulting in poor smoothness of the line put into operation and the comfort of the running vehicles, frequent track diseases, and aggravated environmental vibration and noise problems.

[0003] In the prior art, the track bed types of urban rail transit are mainly divided into two categories: ballast track beds and monolithic track beds. The ballast track bed has the characteristics of simple structure, good elasticity, easy laying, convenient replacement, etc. However, it is not easy to ensure the track geometry, and maintenance and repair are required at regular intervals; the monolithic track bed has a stable structure, a clean appearance, and a small amount of maintenance and repair. It can be precast or cast-in-situ, and the construction is relatively convenient, especially suitable for the laying of high-speed lines. Therefore, the monolithic track bed is generally used for the underground section of the main line of urban rail transit projects. The monolithic track bed is generally divided into cast-in-situ track bed and precast track bed, depending on the on-site requirements. The vibration reduction and noise reduction measures of the monolithic track bed are generally divided into non-vibration reduction track bed, surface contact vibration reduction track bed, and point contact vibration reduction track bed. In residential areas or areas with requirements for vibration reduction and noise reduction, the surface contact vibration reduction track bed or the point contact vibration reduction track bed is generally used. As Figure 1A shown, the existing surface contact vibration reduction track bed is generally formed by fully paving a rubber vibration reduction pad 103 between a reinforced concrete track bed 101 and a self-compacting concrete 102. As Figure 1BAs shown in the figure, the point-contact vibration-damping roadbed realizes the purpose of vibration and noise reduction by evenly distributing a number of spring vibration isolators or steel springs 105 on both sides of the reinforced concrete roadbed 101 in the track-laying direction. An embedded outer cylinder 104 is sleeved outside the spring vibration isolator or steel spring 105, and height adjustment is achieved through a number of height-adjusting gaskets 106. Although both can achieve a certain effect of vibration and noise reduction, there are still many problems: For the roadbed with vibration-damping pads, the vibration-damping pads are usually laid in a full-coverage form, which makes the stiffness of the entire vibration-damping system still relatively large, and the height is fixed. It is very difficult to adjust the track elevation. In addition, the vibration-damping pads are usually fixed to the precast slab by secondary processing (such as riveting, pasting), and the process is complex and the construction accuracy is not easy to control. The point-contact vibration-damping roadbed generally uses rubber spring vibration isolators and steel spring vibration isolators to implement the vibration and noise reduction function. For the point-contact vibration-damping roadbed, its construction process is relatively complex and the labor intensity of workers is high. It is not easy to adjust the track elevation, and due to its own structural characteristics, the thickness and weight of the roadbed are relatively large, and it is not applicable to lines with restrictions on the size and weight of the roadbed such as elevated lines.

[0004] Surface-contact vibration-damping roadbed (rubber vibration-damping pad roadbed): It has a relatively high stiffness. If the stiffness needs to be adjusted, the whole needs to be replaced, and it is basically impossible to implement; it is impossible to adjust the track elevation because the thickness of the vibration-damping pad is fixed, and the track elevation is controlled by the subsequent self-compacting concrete. The process is relatively complex (it is necessary to jack up the roadbed to the required elevation according to the predicted elevation with a jack, then make self-compacting concrete enclosures to surround the four sides of the roadbed slab, and then inject self-compacting concrete into the grouting port of the roadbed slab. The concrete will fill the gap between the jacked-up roadbed and the ground, and after curing, the required track elevation is achieved, and finally the enclosures and jacks are removed to complete the installation of the roadbed). After the concrete is cured, it is impossible to adjust the elevation, and the construction accuracy is not easy to control.

[0005] Point-contact vibration-damping roadbed (rubber spring and steel spring roadbed): The weight and size of the roadbed are large because the existing rubber spring and steel spring vibration isolators are installed with embedded through-type outer cylinders. Due to structural reasons, it will cause the thickness of the roadbed slab to be relatively large, and the larger the thickness dimension, the greater the weight will be. This not only increases the manufacturing cost but also increases the load burden on the surrounding facilities and the risk of diseases. In addition, it is a bit inconvenient to adjust the track elevation when installing the rubber spring and steel spring. Different thickness height-adjusting gaskets need to be installed between the spring and the embedded outer cylinder to achieve the height-adjusting function. Since the thickness of the height-adjusting gasket is fixed, the height-adjusting precision is doomed not to be very accurate, and when the construction quality of the foundation is not good, the difficulty of height adjustment will also increase.

[0006] Therefore, in view of the above defects, the designer of the present utility model, through painstaking research and design, integrating the experience and achievements of being engaged in the relevant industry for many years, has researched and designed a quick-install point vibration-damping roadbed system to overcome the above defects. Summary of the Utility Model

[0007] The object of the utility model is to provide a quick - installation vibration - isolation roadbed system, which has a simple structure and is convenient to operate, overcomes many defects existing in the current vibration - damping track structure system, has higher adjustment precision and flexibility, reduces the construction difficulty, simplifies the height - adjustment cost and construction process a lot, effectively adjusts the vibration - damping performance of the roadbed, and is more flexible and widely applicable.

[0008] To achieve the above object, the utility model discloses a quick - installation vibration - isolation roadbed system, which at least comprises a precast roadbed slab and an infinitely variable height - adjustment device, and is characterized in that:

[0009] Both ends of the precast roadbed slab are provided with limiting boss U - shaped grooves for casting limiting bosses after installation. The top surface of the precast roadbed slab is provided with two rows of load - bearing platforms arranged at intervals in sequence. The precast roadbed slab is a precast reinforced concrete cuboid structure. The bottom surface of the precast roadbed slab is provided with a plurality of rubber spring vibration isolators, and an infinitely variable height - adjustment device is arranged at the bottom of each rubber spring vibration isolator;

[0010] Each rubber spring vibration isolator is fixed through an embedded flange assembly poured into the precast roadbed slab. The embedded flange assembly is provided with a plurality of fixing holes, and the rubber spring vibration isolator is correspondingly provided with a plurality of connecting holes, and is fixed to the embedded flange assembly through a plurality of connecting bolts.

[0011] Among them: the embedded flange assembly comprises a disc - shaped flange plate, and the inner side surface of the flange plate is welded with a plurality of connecting steel bars extending into the precast roadbed slab. The connecting steel bars are tied and fixed to the roadbed steel bars in the precast roadbed slab.

[0012] Among them: the infinitely variable height - adjustment device is a bag - shaped hollow structure, with a hollow interior and provided with a grouting port and an exhaust port.

[0013] Among them: the bag body of the infinitely variable height - adjustment device is made of a high - molecular flexible polymer, and polymer high - strength mortar material is poured into it so as to adjust the pouring amount according to the size of the gap.

[0014] Among them: a plurality of resonator installation holes are preset on the top surface of the precast roadbed slab. The resonator installation holes are internal - thread holes to detachably install a roadbed resonator device through fastening bolts.

[0015] Among them: the roadbed resonator device is provided with installation hole positions, which are consistent with the hole positions of the resonator installation holes on the top surface of the precast roadbed slab.

[0016] Among them: the roadbed resonator device is made of reinforced concrete and has no metal frame structure.

[0017] Among them: the roadbed resonator device comprises a resonator body made of reinforced concrete. The resonator body is cuboid - shaped, and an elastic buffer structure is arranged at its bottom.

[0018] As can be seen from the above, the quick - installation point - isolation vibration - damping track bed system of the present utility model has the following effects:

[0019] 1. The point - contact vibration - damping scheme is used, and modular construction of the entire track bed slab vibration - damping system is realized. That is, the track bed slab and the vibration - damping device (rubber spring isolator) are pre - assembled in the slab factory and directly hoisted and placed at the construction site, without the need to install the isolator separately on - site. The track elevation adjustment is achieved by using a separate stepless height - adjustment device, eliminating the subsequent concrete grouting process. If the elevation needs to be adjusted or the isolator needs to be replaced later, it is relatively convenient to disassemble, install, replace the isolator and the height - adjustment device, without cumbersome procedures.

[0020] 2. Resonator installation holes are provided at the top of the track bed slab. When the vibration - damping and noise - reduction requirements of the track bed slab cannot be met or the vibration frequency of the track bed needs to be adjusted, the track bed resonator can be installed to improve or eliminate the diseases.

[0021] The detailed content of the present utility model can be obtained through the following description and the accompanying drawings. Description of the Drawings

[0022] Figure 1A and Figure 1B respectively show the structural schematic diagrams of the surface - contact vibration - damping track bed and the point - contact vibration - damping track bed in the prior art.

[0023] Figure 2 shows the structural schematic diagram of the quick - installation point - isolation vibration - damping track bed system of the present utility model.

[0024] Figure 3 shows the structural schematic diagram of the precast track bed in the present utility model.

[0025] Figure 4 shows the installation schematic diagram of the rubber spring isolator in the present utility model.

[0026] Figure 5 shows the structural schematic diagram of the rubber spring isolator in the present utility model.

[0027] Figure 6 shows the structural schematic diagram of the embedded flange assembly in the present utility model.

[0028] Figure 7 shows the bottom view of the present utility model.

[0029] Figure 8A , Figure 8B and Figure 8C show the construction schematic diagram of the present utility model.

[0030] Reference Signs:

[0031] 10. Prefabricated roadbed slab; 11. U-shaped groove of limit boss; 12. Rail bearing table; 13. Resonator installation hole; 14. Roadbed steel bars; 15. Embedded flange assembly; 151. Flange plate; 152. Connecting steel bars; 153. Fixing hole; 16. Rubber spring isolator; 161. Connecting hole; 162. Connecting bolt; 17. Roadbed resonance device; 18. Tightening bolt; 19. Infinite height adjustment device; 20. Base; 21. Jacking support device; 22. Height adjustment gap. Detailed implementation manners

[0032] Refer to Figures 2 to 7 , which shows the quick-installation point vibration isolation roadbed system of the present utility model.

[0033] As Figure 2 shown, the quick-installation point vibration isolation roadbed system is divided into three parts, namely a roadbed resonance device (optional), a prefabricated roadbed slab, and an infinite height adjustment device from top to bottom. The combination of the three parts realizes the functional requirements of the entire roadbed system. The roadbed resonance device can be optionally installed in some places where resonators are needed. First, refer to Figure 3 simultaneously. Both ends of the prefabricated roadbed slab 10 are provided with U-shaped grooves 11 of limit bosses for pouring limit bosses after the prefabricated roadbed slab 10 is placed and installed. The function of the limit bosses is to limit the lateral movement of the prefabricated roadbed slab 10 and ensure that the relative positions between the prefabricated roadbed slabs 10 do not change significantly. Two rows of rail bearing tables 12 arranged at intervals are provided on the top surface of the prefabricated roadbed slab 10, and a plurality of resonator installation holes 13 are preset on the top surface of the prefabricated roadbed slab 10. The resonator installation holes 13 are internal threaded holes to detachably install the roadbed resonance device 17 through tightening bolts 18. When the roadbed system of this application needs to enhance the vibration reduction performance or change its natural vibration frequency, it can be achieved by installing the roadbed resonance device 17. The roadbed resonance device 18 is provided with installation holes, which are consistent with the hole positions of the resonator installation holes 13 on the top surface of the prefabricated roadbed slab 10. The function requirements can be achieved only by using the tightening bolts 18 to fix the roadbed resonance device 17 to the prefabricated roadbed slab. The applicant has already had a similar patent application for the structural form of this kind of roadbed resonance device, and reference can be made to CN202210872570.4 Roadbed resonator, resonance system, track system and installation method of resonator, CN202221908727.6 Roadbed resonator, resonance system and track system. Preferably, the roadbed resonance device 17 in this application is made of reinforced concrete material and has no metal frame structure and no other redundant accessories, which is more concise and efficient. More preferably, the roadbed resonance device 17 includes a resonance body made of reinforced concrete. The resonance body is in a cuboid shape, and an elastic buffer structure is arranged at its bottom. The tightening bolt 18 is provided with a soft gasket to avoid hard contact.

[0034] The precast track bed slab 10 is a precast reinforced concrete cuboid structure. A plurality of rubber spring vibration isolators 16 are provided on the bottom surface of the precast track bed slab 10, and a stepless height adjustment device 19 is provided at the bottom of each rubber spring vibration isolator 16.

[0035] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 . Each rubber spring vibration isolator 16 is fixed by an embedded flange assembly 15 poured into the precast track bed slab 10. The embedded flange assembly 15 is provided with a plurality of fixing holes 153, and the rubber spring vibration isolator 16 is correspondingly provided with a plurality of connection holes 161 to be fixed to the embedded flange assembly 15 through a plurality of connection bolts 162.

[0036] The embedded flange assembly 15 includes a disc-shaped flange plate 151. A plurality of connecting steel bars 152 extending into the precast track bed slab 10 are welded to the inner side surface of the flange plate 151. The connecting steel bars 152 are used for binding and fixing with the track bed steel bars 14 in the precast track bed slab 10. After pouring is completed, the disc-shaped end face of the flange plate 151 is flush with the bottom surface of the precast track bed slab 10.

[0037] Among them, the number of the embedded flange assemblies 15 is arranged in even numbers such as 8, 10, 12, etc. The specific number is determined according to the length dimension of the track bed slab required in actual situations. The conventional number is 8, 4 on each side. The process of connecting the rubber spring vibration isolators to the embedded flange assemblies through connection bolts is completed in the precast slab factory. What is delivered to the construction site is a complete vibration reduction track bed system, and there is no need to install vibration isolators separately.

[0038] The stepless height adjustment device 19 is a separate structure, and one is installed at the bottom of each rubber spring vibration isolator. After the vibration reduction track bed is hoisted in place and the elevation is adjusted, there is still a gap between the rubber spring vibration isolator and the base. Due to the unevenness of the base, this gap also varies slightly. Figure 1B In , the height of the rubber spring vibration isolator is adjusted by height adjustment washers with a fixed thickness. In this application, a stepless height adjustment device is used to achieve height adjustment. The stepless height adjustment device 19 is a bag-shaped hollow structure, with a hollow interior and a grouting port and an exhaust port provided. The bag body is made of a high molecular flexible polymer, and a polymer high-strength mortar material can be poured into it. The pouring amount is adjusted according to the size of the gap. Because the gap is filled with semi-liquid mortar, various size ranges can be taken into account, and the adjustment accuracy is relatively high. After pouring is completed and the mortar is completely solidified and hardened, a reliable support structure is formed to realize the fixed support of the track bed. The stepless height adjustment device is a bag-shaped structure. Preferably, the stepless height adjustment assembly includes a high molecular polymer flexible outer sleeve made of a high molecular flexible material.

[0039] Such as Figure 8A , Figure 8B and Figure 8CAs shown, the specific construction process of this application is significantly different from that of the existing track bed system.

[0040] Construction process of the existing track bed system (vibration damping pad track bed): 1. Precast and pour the concrete track bed slab to form (construction in the precast yard); 2. Brush glue on the bottom surface of the track bed slab, lay the vibration damping pad, install the limit boss pad and grouting sleeve, etc. (construction in the precast yard); 3. Hoist, support, level, and install the enclosing board for the track bed slab on site (on-site construction); 4. Pour self-compacting concrete to solidify the track bed slab (on-site construction); 5. Remove the enclosing board (on-site construction); 6. Lay the track (on-site construction).

[0041] Construction process of the existing track bed system (rubber spring / steel spring isolator track bed): 1. Precast and pour the concrete track bed slab, and it is necessary to embed a steel outer cylinder in the track bed slab (construction in the precast yard); 2. Hoist the track bed slab on site (on-site construction); 3. Lift the track bed slab, and install the rubber spring / steel spring isolator one by one in sequence (on-site construction); 4. Measure the elevation, and install the height adjustment shim according to the height adjustment requirement (on-site construction); 5. Measure the elevation again, finely adjust the height, increase or decrease the height adjustment shim until the height adjustment is completed (on-site construction); 6. Lay the track (on-site construction).

[0042] Construction process of the present utility model: 1. Precast and pour the precast track bed slab, embed the connecting flange, and install the rubber spring isolator (construction in the precast yard); 2. Hoist the precast track bed slab on site (on-site construction); 3. Measure the elevation and support the track bed slab (on-site construction, support is carried out between the base 20 and the precast track bed slab through the jacking support device 21, so as to form a height adjustment gap 22 between the rubber spring isolator 16 and the base 20); 4. Install the stepless height adjustment device 19 at the bottom of the rubber spring isolator 16, and pour mortar according to the height adjustment requirement to complete the height adjustment (on-site construction); 5. Lay the track (on-site construction); 6. Install the track resonator according to the requirement.

[0043] Therefore, the track bed system of this invention has the following advantages:

[0044] 1. The height adjustment is point height adjustment, that is, a grouting height adjustment device is placed at the bottom of each rubber spring for height adjustment, with higher height adjustment accuracy and flexibility. If the elevation needs to be adjusted later, it can also be replaced. In addition, this height adjustment method simplifies the cost and construction process of the overall pouring of self-compacting concrete for the vibration damping pad track bed by a lot.

[0045] 2. The track resonator device can be selectively installed to effectively adjust the vibration damping performance of the track bed, and it is more flexible and widely applicable.

[0046] 3. Connection and fixation are carried out through the embedded flange assembly, and the manufacturing cost and construction process of the existing point-supported embedded outer cylinder are greatly reduced and simplified.

[0047] 4. The rubber spring vibration isolators have been pre-installed at the slab factory. The track slab can be directly hoisted and installed on site. The grouting type stepless height adjustment method is adopted, which improves the height adjustment accuracy and reduces the construction difficulty compared with the existing height adjustment method using fixed-thickness height adjustment gaskets.

[0048] It is obvious that the above description and record are only examples and not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the examples and illustrated in the drawings, the present invention does not limit to the specific examples described in the examples and illustrated in the drawings as the currently considered best mode for implementing the teachings of the present invention. The scope of the present invention will include any embodiments falling within the foregoing specification and the appended claims.

Claims

1. A fast-installation point vibration isolation ballast system, comprising at least a prefabricated ballast plate and a stepless height adjustment device, characterized in that: Both ends of the prefabricated roadbed plate are provided with limiting boss U-shaped grooves for casting limiting bosses after installation. The top surface of the prefabricated roadbed plate is provided with two rows of rail bearing platforms arranged in sequence. The prefabricated roadbed plate is a prefabricated reinforced concrete rectangular parallelepiped structure. The bottom surface of the prefabricated roadbed plate is provided with a plurality of rubber spring isolators, and the bottom of each rubber spring isolator is provided with a stepless height adjustment device; Each rubber spring isolator is fixed by a pre-embedded flange assembly cast into the prefabricated track bed slab. The pre-embedded flange assembly is provided with a plurality of fixing holes, and the rubber spring isolator is correspondingly provided with a plurality of connecting holes so as to be fixed to the pre-embedded flange assembly by a plurality of connecting bolts.

2. The quick-installation point vibration isolation track bed system according to claim 1, characterized in that: The embedded flange assembly comprises a disc-shaped flange plate, and a plurality of connecting steel bars extending into the prefabricated roadbed plate are welded to the inner side surface of the flange plate, and the connecting steel bars are tied and fixed to the roadbed steel bars in the prefabricated roadbed plate.

3. The quick-installation point vibration isolation track bed system according to claim 1, characterized in that: The stepless height adjustment device is a bag-shaped hollow structure, which is hollow inside and is provided with a grouting port and an exhaust port.

4. The quick-installation point vibration isolation track bed system according to claim 3, characterized in that: The bag body of the stepless height adjustment device is made of high-molecular flexible polymer, and polymer high-strength mortar material is poured inside to adjust the pouring amount according to the size of the gap.

5. The fast-installation point vibration isolation track bed system according to any one of claims 1 to 4, characterized in that: The top surface of the prefabricated ballast plate is preset with a plurality of resonator mounting holes, and the resonator mounting holes are internal threaded holes for detachably mounting the ballast bed resonance device by tightening bolts.

6. The quick-installation point vibration isolation track bed system according to claim 5, characterized in that: The ballast resonance device is provided with mounting holes which are consistent with the positions of the resonator mounting holes on the top surface of the prefabricated ballast plate.

7. The quick-installation point vibration isolation track bed system according to claim 5, characterized in that: The ballast resonance device is made of reinforced concrete and has no metal frame structure.

8. The fast-installation point vibration isolation track bed system according to claim 5, characterized in that: The track bed resonance device comprises a resonance body made of reinforced concrete. The resonance body is in a rectangular shape, and an elastic buffer structure is arranged at the bottom thereof.

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