Precast slab floating bed

Abstract

The utility model relates to the technical field of civil engineering, concretely relates to a prefabricated slab floating bed. Its including prefabricated slab, shared vibration isolation device and height -adjusting backing plate, still include side formula multifunctional shear hinge, side formula multifunctional shear hinge includes multifunctional shear plate and anchoring connecting piece, multifunctional shear plate sets up on the side vertical surface of the end of the outer side groove, and multifunctional shear plate is equipped with connecting through -hole, and the anchoring connecting piece is fixed correspondingly on the prefabricated slab, and multifunctional shear plate is fixed with the adjacent two prefabricated slab respectively by the cooperation of fastener and anchoring connecting piece through connecting through -hole and is connected;Multifunctional shear plate extends to the upper shell top surface below of shared vibration isolation device along the vertical direction, and shared vibration isolation device is surrounded in the limiting groove that correspondingly sets up in the lower part of the adjacent prefabricated slab end. Its simple structure, good economy, construction is quick, cost-effective, safe and reliable, can be widely used in subway, ground light rail and other rail transit line engineering.

Description

Technical Field

[0001] This utility model belongs to the field of civil engineering technology, and in particular relates to a precast slab floating track bed. Background Technology

[0002] Precast slab floating track technology is widely used in the rail transit field due to its advantages such as short construction period and guaranteed project quality. For example, Chinese Patent Publication No. CN103306168A discloses a precast floating slab track and its construction method, which utilizes slab end vibration isolation devices (i.e., shared vibration isolation devices) set at the ends of adjacent precast slabs and built-in vibration isolation devices in the precast slab body to jointly achieve elastic support for the precast slabs. Then, shear hinges are used to connect the precast slabs together to form a complete floating track structure, thereby achieving a good vibration isolation effect. However, in order to better integrate with the precast short slab, existing slab-end vibration isolation devices typically have lateral and longitudinal limiting structures on their top surface that match the side facade of the precast short slab. On the one hand, the addition of these structures makes the product more complex and consumes more materials, increasing storage and transportation inconvenience and raising product costs. On the other hand, because the track line involves many curved sections, the gaps between the lateral and longitudinal limiting structures of the slab-end vibration isolation device and the side facade of the precast short slab vary considerably, requiring many shims for adjustment, which is time-consuming, difficult to install, slow in construction, and results in poor limiting effect.

[0003] In conclusion, the market urgently needs a precast floating track bed that is cheaper and faster to construct. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned defects and provide a precast floating track bed that is simple in structure, quick to construct, and more economical.

[0005] This utility model of a precast slab floating track bed is implemented as follows: It includes precast slabs, a shared vibration isolation device, and a height adjustment pad. The shared vibration isolation device is installed in a limiting groove corresponding to the lower end of the adjacent precast slab. It also includes a side-mounted multi-functional shear hinge, which comprises a multi-functional shear plate and anchoring connectors. The multi-functional shear plate is installed on the side surface of the outer end of the limiting groove, and has connecting through holes. Anchoring connectors are correspondingly fixed on the precast slabs. Fasteners pass through the connecting through holes and cooperate with the anchoring connectors to fix the multi-functional shear plate to two adjacent precast slabs respectively. The multi-functional shear plate extends vertically below the top surface of the upper shell of the shared vibration isolation device, enclosing the shared vibration isolation device within the limiting groove corresponding to the lower end of the adjacent precast slab.

[0006] The precast floating track bed of this utility model may also include an elastic buffer pad, which is at least disposed between the shared vibration isolation device and the multifunctional shear plate side-mounted multifunctional shear hinge.

[0007] To protect the precast slab from damage during use, the side-mounted multi-functional shear hinge may also include a pressure equalizing plate. This pressure equalizing plate is fixedly installed on the side facade where the precast slab and the multi-functional shear plate mate, and the anchoring connectors are integrally connected to the pressure equalizing plate. Alternatively, the precast slab floating track bed of this invention may also include a wear-resistant layer or wear-resistant components. These layers or components are installed on the surface of the side facade where the precast slab and the multi-functional shear plate mate, or the wear-resistant components are installed between the precast slab and the multi-functional shear plate. Furthermore, the precast slab floating track bed of this invention may also include a low-friction coefficient sliding pair. This low-friction coefficient sliding pair is installed between the precast slab and the multi-functional shear plate, with the low-friction coefficient sliding pairs spaced 20-50 meters longitudinally along the precast slab.

[0008] To ensure a tight fit between the multi-functional shear plate and the side facades of the adjacent precast slabs, a bend can be provided in the middle of the multi-functional shear plate, and the bend of the multi-functional shear plate should be adapted to the included angle between the side facades of the adjacent precast slabs. In addition, a gap leveling and curing layer can be provided between the multi-functional shear plate and the side facades of the adjacent precast slabs. Of course, a gap compensation pad can also be added to the floating track bed of the precast slabs in this utility model, and the gap compensation pad is set between the multi-functional shear plate and the precast slab.

[0009] Preferably, the connecting through holes provided on the multifunctional shear plate are elongated holes. The length direction of the connecting through holes on the multifunctional shear plate that mate with a precast slab is arranged along the longitudinal direction of the precast slab, and the length direction of the corresponding connecting through holes on the multifunctional shear plate that mate with another precast slab is arranged along the vertical direction of the precast slab.

[0010] The precast floating track bed of this utility model may also include a built-in vibration isolation device. The built-in vibration isolation device includes an outer sleeve, a vibration isolator, and a height adjustment pad. The outer sleeve is precast and integrated with the precast slab. A support block is fixedly installed on the outer sleeve. The vibration isolator is installed below the support block and supports the outer sleeve through the height adjustment pad, thereby elastically supporting the precast slab.

[0011] This utility model relates to a precast slab floating track bed. By setting up a side-mounted multi-functional shear hinge, the multi-functional shear plate in the side-mounted multi-functional shear hinge cooperates with a shared vibration isolation device to block the shared vibration isolation device in the corresponding limiting groove set at the lower part of the adjacent precast slab end. This achieves mutual combination and auxiliary limiting between the shared vibration isolation device and the precast slab. Since the shared vibration isolation device no longer has a transverse or longitudinal limiting structure that cooperates with the side facade of the precast slab end, the structure of the shared vibration isolation device is greatly simplified, and the cooperation and installation process between it and the precast slab is also simpler and faster. This is conducive to significantly improving the construction speed and effectively reducing the system cost.

[0012] In summary, the precast floating track bed of this utility model has a simple structure, good economy, quick construction, high cost performance, and is safe and reliable. It can be widely used in rail transit line projects such as subways and light rail. Attached Figure Description

[0013] Figure 1 This is one of the structural schematic diagrams of the precast floating track bed of this utility model.

[0014] Figure 2 for Figure 1 AA sectional view.

[0015] Figure 3 for Figure 1 The partial view from direction B.

[0016] Figure 4 This is the second structural schematic diagram of the precast floating track bed of this utility model.

[0017] Figure 5 for Figure 4 CC section view.

[0018] Figure 6 for Figure 4 DD sectional view.

[0019] Figure 7 for Figure 4 The partial view in direction E.

[0020] Figure 8 This is the third structural schematic diagram of the precast floating track bed of this utility model.

[0021] Figure 9 This is the fourth structural schematic diagram of the precast floating track bed of this utility model.

[0022] Figure 10 This is the fifth structural schematic diagram of the precast floating track bed of this utility model.

[0023] Figure 11 This is the sixth structural schematic diagram of the precast floating track bed of this utility model.

[0024] Figure 12 for Figure 11 FF sectional view.

[0025] Figure 13 This is the seventh structural schematic diagram of the precast floating track bed of this utility model.

[0026] Figure 14 This is the eighth structural schematic diagram of the precast floating track bed of this utility model. Detailed Implementation

[0027] Example 1 like Figure 1 , Figure 2 and Figure 3 The precast floating track bed of this utility model, as shown, includes precast slabs, a shared vibration isolation device 4, and a height adjustment pad 16. Rails 5 are mounted on the precast slabs. Multiple precast slabs are provided. (For ease of explanation...) Figure 1 The diagram illustrates three precast slabs: a first precast slab 1, a second precast slab 2, and a third precast slab 3. A shared vibration isolation device 4 is installed within a corresponding limiting groove 6 located at the lower end of the adjacent precast slabs. Figure 2 As shown in the figure, the shared vibration isolation device in this example specifically consists of an upper shell 7, a lower shell 8, an elastic element 9, and a damping element 10. The elastic element 9 is specifically a helical steel spring, and the damping element 10 is specifically a viscous damper. Furthermore, it includes a side-mounted multi-functional shear hinge, which includes a multi-functional shear plate 13. The multi-functional shear plate 13 is mounted on the side facade of the outer end of the limiting groove 6, and the multi-functional shear plate 13 has a connecting through hole (not specifically shown in the figure). Anchoring connectors 15 are correspondingly provided on the precast slab, utilizing… Fasteners 14 are used to pass through the connecting through-holes and engage with anchoring connectors 15 to fix the multifunctional shear plate 13 to the two adjacent precast slabs respectively; the multifunctional shear plate 13 extends vertically to below the top surface of the upper shell 7 of the shared vibration isolation device, surrounding the shared vibration isolation device 4 within the corresponding limiting groove 6 at the lower end of the adjacent precast slab; in addition, the lower shell 8 of the shared vibration isolation device 4 is also fixedly connected to the foundation 12 by anchor bolts 11; to facilitate the height adjustment and leveling of the floating slab, the shared vibration isolation device 4 supports the precast slab through the height adjustment pad 16.

[0028] This utility model relates to a precast slab floating track bed. By setting up a side-mounted multi-functional shear hinge, the multi-functional shear plate in the side-mounted multi-functional shear hinge cooperates with a shared vibration isolation device. The shared vibration isolation device is blocked in the corresponding limiting groove set at the lower part of the adjacent precast slab end. When the floating slab undergoes a large lateral displacement, the multi-functional shear plate will come into close contact with the shared vibration isolation device, restricting further lateral movement of the floating slab. This achieves mutual combination and auxiliary limiting between the shared vibration isolation device and the precast slab. Since the shared vibration isolation device no longer has a lateral or longitudinal limiting structure that cooperates with the side facade of the precast slab end, the structure of the shared vibration isolation device is greatly simplified, and the installation process between it and the precast slab is also simpler and faster. This is conducive to significantly improving the construction speed and effectively reducing the system cost.

[0029] In summary, the precast floating track bed of this utility model has a simple structure, good economy, quick construction, high cost performance, and is safe and reliable. It can be widely used in rail transit line projects such as subways and light rail.

[0030] Example 2 like Figure 4 , Figure 5 , Figure 6 and Figure 7 The precast slab floating track bed of this utility model differs from Embodiment 1 in that, in addition to the shared vibration isolation device 4, it also includes a built-in vibration isolation device 17, such as... Figure 6 The built-in vibration isolation device shown includes an outer sleeve 19, a vibration isolator 20, and a height adjustment pad 16. The outer sleeve 19 is precast integrally with the second precast slab 2. A support block 21 is fixedly installed on the outer sleeve 19. The vibration isolator 20 is located below the support block 21 and supported by the outer sleeve 19 through the height adjustment pad 16, thereby elastically supporting the second precast slab 2. Furthermore, as... Figure 5 As shown, in the shared vibration isolation device, the upper shell 7 and the lower shell 8 adopt box-shaped structures respectively. The damping element 10 is specifically the damping material set in the lower shell 8, and the elastic element 9 is partially placed in the damping material. An elastic buffer pad 18 is also provided between the upper shell 7 and the multifunctional shear plate 13. The elastic buffer pad 18 is specifically a rubber pad, which is vulcanized and fixed to the multifunctional shear plate 13 as a whole. In addition, as Figure 7 As shown, the connecting through holes 22 provided on the multifunctional shear plate 13 are elongated holes. The connecting through holes 22 on the multifunctional shear plate 13 that cooperate with the first precast plate 1 are arranged along the longitudinal direction of the precast plate, and the corresponding connecting through holes 22 on the multifunctional shear plate 13 that cooperate with the second precast plate 2 are arranged along the vertical direction of the precast plate.

[0031] Compared with Embodiment 1, the technical solution described in this example adds a built-in vibration isolation device. The precast slab is elastically supported by both the shared vibration isolation device and the built-in vibration isolation device, which can be applied to precast slabs with large length and weight. In addition, the damping element in the shared vibration isolation device is replaced with damping material set in the lower shell, which increases the space for placing elastic elements, which is beneficial to improving the load-bearing capacity of the shared vibration isolation device and optimizing its vibration reduction performance. Furthermore, since an elastic buffer pad is set between the upper shell and the multifunctional shear plate, it can effectively prevent direct collision between the upper shell and the multifunctional shear plate during use, which can reduce noise and prevent impact damage, thus extending the service life of the system. Fourth, a side-mounted multifunctional shear hinge is adopted. Figure 7 The connection through-hole setting shown makes the height adjustment and leveling of precast slabs more convenient and faster. On the other hand, when adjacent precast slabs shift relative to each other due to thermal expansion and contraction during use, the connection through-holes can automatically adapt, effectively preventing the precast slabs from being squeezed and damaged.

[0032] Based on the technical principle of this example, in addition to being integrally connected with the multifunctional shear plate, the elastic buffer pad can also be integrally connected with the upper shell of the shared vibration isolation device through vulcanization or bonding. Moreover, the elastic buffer pad can even be set around the upper shell, which can effectively prevent the upper shell from directly colliding with the side facade of the precast slab, thus better protecting the upper shell and improving the product's service life. On the other hand, the materials for the elastic buffer pad can be varied. In addition to the rubber pad already mentioned, other elastic materials such as elastic polyurethane pads can also be used to achieve good technical effects. These are all simple variations based on the technical principle of this utility model, which are only described in words here without drawing pictures, and are all within the protection scope claimed by this utility model.

[0033] Example 3 like Figure 8 The precast floating track bed of this utility model differs from Embodiment 2 in that it also includes a low friction coefficient sliding pair 24. The low friction coefficient sliding pair 24 is disposed between the precast slab and the multifunctional shear plate 13, and the low friction coefficient sliding pair 24 is disposed at intervals of about 20 meters along the longitudinal direction of the precast slab.

[0034] In practical applications, low-friction coefficient sliding pairs can be made of materials such as polytetrafluoroethylene (PTFE) sheets. These materials can effectively adapt to the relative displacement between precast slabs caused by thermal expansion and contraction, ensuring the transmission of shear force between adjacent precast slabs. However, they reduce the resistance to relative movement in the longitudinal direction of the precast slabs, avoiding damage to the slab body or fasteners, and thus extending the service life of the system. Alternatively, low-friction coefficient sliding pairs can be made of materials such as polyurea, which can be directly sprayed onto the mating surfaces of the precast slabs or multi-functional shear plates, achieving excellent technical results. Furthermore, in this example, low-friction coefficient sliding pairs 24 are set at intervals of approximately 20 meters along the longitudinal direction of the precast slabs. This is because setting low-friction coefficient sliding pairs between every adjacent precast slab would increase material usage and thus cost. Setting a low-friction functional zone at intervals of approximately 20 meters, which can adapt to changes in thermal expansion and contraction, ensures safety while avoiding a significant increase in cost, resulting in a better cost-performance ratio. Of course, the spacing of the low-friction coefficient sliding pair can also be varied depending on the length of the precast slab and the actual value of the relative displacement between the precast slabs. Generally speaking, the range of 20 meters to 50 meters is the most suitable. This is only explained in words. These are all simple changes based on the technical principle of this utility model and are all within the protection scope claimed by this utility model.

[0035] Example 4 like Figure 9 The precast floating track bed of this utility model differs from Embodiment 2 in that it also includes a wear-resistant layer 25, which is specifically formed by directly spraying polyurea material onto the side surface of the precast slab and the multifunctional shear plate.

[0036] Compared to Example 2, the technical solution described in this example, due to the addition of a wear-resistant layer, effectively avoids damage caused by wear on the mating surfaces of the precast slab and the multi-functional shear plate during use due to relative movement, thus extending the service life of both the precast slab and the multi-functional shear plate and improving the overall system lifespan. Of course, based on the technical principles of this example, in addition to polyurea materials, other wear-resistant materials can be used. For example, a wear-resistant alloy coating can be applied to the surface of the multi-functional shear plate as a wear-resistant layer to achieve the same technical effect. Furthermore, wear-resistant components can be used instead of the wear-resistant layer, for example... Figure 10 As shown, it also includes a wear-resistant component 26, which is specifically made of fiberglass plate. The wear-resistant component 26 is disposed between the precast slab and the multifunctional shear plate 13. Of course, the wear-resistant component 26 can also be made of steel plate or other wear-resistant materials. Furthermore, the wear-resistant component can also be directly fixed on the surface of the precast slab and cooperate with the multifunctional shear plate. These are all simple variations based on the technical principle of this utility model and are all within the protection scope claimed by this utility model.

[0037] It should be noted that in this invention, the wear-resistant layer and the low-friction coefficient sliding pair can be integrated together. For example, in this case, the wear-resistant layer made of polyurea material can also be used as a low-friction coefficient sliding pair, which helps to simplify the system structure.

[0038] Example 5 like Figure 11 and Figure 12 The difference between the precast slab floating track bed of this utility model and Embodiment 2 is that, for working conditions such as curved sections, the multifunctional shear plate 13 has a bend in the middle, and the bend of the multifunctional shear plate 13 is adapted to the included angle between the side facades that are installed and cooperate with the adjacent precast slabs; in addition, the side-mounted multifunctional shear hinge also includes a pressure equalizing plate 23, which is fixedly installed on the side facades that cooperate with the precast slabs and the multifunctional shear plate, and the anchoring connector 15 is fixedly connected to the pressure equalizing plate 23 as a whole.

[0039] Compared with Embodiment 2, in the technical solution described in this example, since an appropriate angle of bend is set on the multifunctional shear plate 13, no additional gap compensation shims are required when assembling it with the side facade of the adjacent precast slab. This ensures a tight fit between the multifunctional shear plate and the corresponding side facade of the precast slab, which reduces the number of installation accessories and improves installation efficiency, making it very convenient. In addition, since a pressure equalizing plate is added to the side-mounted multifunctional shear hinge, the pressure load generated by the multifunctional shear plate during operation can be evenly distributed on the precast slab after being dispersed by the pressure equalizing plate, which can effectively avoid crushing or fatigue damage caused by excessive local stress on the precast slab.

[0040] Example 6 like Figure 13 The difference between the precast slab floating track bed of this utility model and Embodiment 5 is that it still uses a multi-functional front force plate without bends, and a gap leveling and curing layer 27 is set between the multi-functional shear plate 13 and the side facade of the adjacent precast slab where they are installed. The gap leveling and curing layer 27 is made of steel adhesive. In application, according to the actual gap size between the multi-functional shear plate 13 and the side facade of the adjacent precast slab where they are installed, the gap leveling and curing layer of the corresponding thickness is applied to the side facade of the precast slab using steel adhesive, the multi-functional shear plate is installed, and after the steel adhesive has cured, the fasteners 14 are tightened.

[0041] Compared with the technical solution described in Example 5, the advantage of the solution described in this example is that the gap leveling and curing layer can accurately compensate for the gap between the multifunctional shear plate and the side facade of the adjacent precast slab in one go, ensuring that the multifunctional shear plate and the side facade of the precast slab are tightly fitted, which is simple and reliable.

[0042] Of course, based on the technical principle of this example, in addition to steel bonding adhesive, materials such as reinforcing adhesive and high-strength grouting material can also be used to form a gap leveling and curing layer, which can also achieve good results. These are all simple variations based on the technical principle of this utility model and are all within the protection scope claimed by this utility model.

[0043] Example 7 like Figure 14 The precast slab floating track bed of this utility model differs from Embodiment 6 in that it also includes a gap compensation pad 28. The gap compensation pad replaces the gap leveling and curing layer to achieve leveling. The gap compensation pad 28 is set between the precast slab (second precast slab 2) and the multifunctional shear plate 13.

[0044] In practical applications, gap compensation pads can be wedge-shaped or composed of multiple sub-pads of different thicknesses. Compared to Example 6, the technical solution described in this example uses gap compensation pads for leveling, which is more convenient and faster, eliminating the time needed for the adhesive to cure and achieving excellent technical results. In practice, specific leveling measures can be selected according to project requirements.

[0045] The embodiments in this utility model are only for better illustrating the technical solutions of this utility model and should not be regarded as a limitation of this utility model. The technical features in many of the embodiments can also be used interchangeably. Based on the technical principles of this utility model, those skilled in the art can recombine the technical solutions described in the above embodiments or use similar technologies to simply replace some of the components. As long as they are based on the technical principles of this utility model, they are all within the protection scope claimed by this utility model.

Claims

1. A precast slab floating track bed, comprising precast slabs, a shared vibration isolation device, and a height adjustment pad, wherein the shared vibration isolation device is disposed in a limiting groove correspondingly provided at the lower part of the end of adjacent precast slabs, characterized in that, It also includes a side-mounted multi-functional shear hinge, which comprises a multi-functional shear plate and anchoring connectors. The multi-functional shear plate is disposed on the side elevation of the outer end of the limiting groove, and the multi-functional shear plate is provided with a connecting through hole. An anchoring connectors are correspondingly fixedly disposed on the precast slab. Fasteners are used to pass through the connecting through hole and cooperate with the anchoring connectors to fix the multi-functional shear plate to two adjacent precast slabs respectively. The multi-functional shear plate extends vertically to below the top surface of the upper shell of the shared vibration isolation device, surrounding the shared vibration isolation device within the limiting groove correspondingly disposed at the lower part of the adjacent precast slab end. The multi-functional shear plate is provided with a bend in the middle, and the bend of the multi-functional shear plate is adapted to the included angle between the side elevations of the adjacent precast slabs that are installed and cooperate.

2. The precast slab floating track bed as described in claim 1, characterized in that, The precast floating track bed also includes an elastic buffer pad, which is at least placed between the shared vibration isolation device and the multifunctional shear plate.

3. The precast slab floating track bed as described in claim 1, characterized in that, The side-mounted multi-functional shear hinge also includes a pressure equalizing plate, which is fixedly installed on the side facade where the precast slab and the multi-functional shear plate cooperate, and the anchoring connector is fixedly connected to the pressure equalizing plate as a whole.

4. The precast slab floating track bed as described in claim 1, characterized in that, The precast floating track bed also includes a wear-resistant layer or wear-resistant components, which are disposed on the surface of the side facade where the precast slab and the multi-functional shear plate cooperate, or the wear-resistant components are disposed between the precast slab and the multi-functional shear plate.

5. The precast slab floating track bed as described in claim 1, characterized in that, The precast floating track bed also includes a low-friction coefficient sliding pair, which is set between the precast slab and the multi-functional shear plate. The low-friction coefficient sliding pair is set at intervals of 20-50 meters along the longitudinal direction of the precast slab.

6. The precast slab floating track bed as described in claim 1, characterized in that, A gap leveling and curing layer is provided between the multifunctional shear plate and the side facade of the adjacent precast slab.

7. The precast slab floating track bed as described in claim 1, characterized in that, The precast floating track bed also includes a gap compensation pad, which is set between the multifunctional shear plate and the precast slab.

8. The precast slab floating track bed as described in claim 1, characterized in that, The connecting through holes provided on the multifunctional shear plate are elongated holes. The length direction of the connecting through holes on the multifunctional shear plate that mate with a precast slab is arranged along the longitudinal direction of the precast slab, and the length direction of the corresponding connecting through holes on the multifunctional shear plate that mate with another precast slab is arranged along the vertical direction of the precast slab.

9. The precast slab floating track bed as described in claim 1, characterized in that, The precast floating track bed also includes a built-in vibration isolation device, which includes an outer sleeve, a vibration isolator, and a height adjustment pad. The outer sleeve is precast and integrated with the precast slab. A support block is fixedly installed on the outer sleeve. The vibration isolator is installed below the support block and supported by the height adjustment pad, thereby elastically supporting the precast slab.

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