Subway track base construction device

Abstract

The utility model provides a subway track base construction device which comprises a base plate body, a pre-stressed anchor bolt set, an elastic cushion, a curvature adjusting mechanism and at least two connecting base plates, dovetail grooves are formed in the two sides of the base plate body, tenons matched with the dovetail grooves are arranged at the ends of the connecting base plates, and the connecting base plates are connected with the pre-stressed anchor bolt set. The pre-stressed anchor bolt set penetrates through the joint face of the base plate body and the connecting base plate, and the elastic cushion layer is bonded to the bottom of the base plate body. The curvature adjusting mechanism comprises an arc-shaped guide rail and a sliding block matched with the arc-shaped guide rail, the arc-shaped guide rail is connected to the top face and / or the bottom face of the base plate body, and the sliding block is connected with the connecting base plate. According to the utility model, through the modularized matching of the dovetail grooves and the tenons and the rigid connection of the pre-stressed anchor bolt groups, the rapid assembly and stable butt joint of the substrate body and the connecting substrate are realized, the elastic cushion layer reduces the vibration transmission of the track, and the curvature adjusting mechanism enables the substrate structure to flexibly adapt to the construction requirements of different linear tracks; and the construction efficiency and the track smoothness are improved.

Description

Technical Field

[0001] This utility model relates to the field of subway construction equipment technology, specifically to a subway track foundation construction device. Background Technology

[0002] Subway track foundation construction is a crucial step in rail transit construction, and its quality directly affects the smoothness and long-term stability of the track system. Traditional construction methods often employ rigid formwork support and manual pouring, which suffers from problems such as mismatch between the support system and dynamic changes in the soil strata, and insufficient construction adaptability. Especially when constructing in soft soil strata or curved sections, existing equipment struggles to achieve precise formwork positioning and pressure equalization control, easily leading to localized stress concentrations or geometric deviations in the concrete structure. Furthermore, conventional equipment has a low level of intelligence, lacking the ability to monitor and coordinate key parameters during construction in real time, relying excessively on manual experience and judgment, making it difficult to meet the dual requirements of efficiency and quality in modern rail transit construction.

[0003] In recent years, with the development of construction technology, some improved devices have enhanced support accuracy by adding formwork adjustment mechanisms. However, their dynamic compensation capabilities under complex geological conditions remain insufficient, failing to effectively address the influence of variables such as ground settlement and temperature deformation during construction. Furthermore, existing technologies exhibit poor adaptability to special working conditions (such as construction in confined spaces and operations in extreme environments), and the problem of limited equipment functionality is prominent, making it difficult to achieve universal construction across multiple scenarios. How to construct construction devices with dynamic response and multi-condition adaptability has become a pressing technical challenge in the field of rail transit construction. Utility Model Content

[0004] One objective of this invention is to solve the problems of traditional substrates having inflexible curvature adjustment, poor connection stability, and low construction efficiency. Therefore, this invention provides a modular subway track base construction device.

[0005] Specifically, this utility model provides a subway track foundation construction device, comprising: a base plate body, a prestressed anchor bolt assembly, an elastic pad, a curvature adjustment mechanism, and at least two connecting base plates. The base plate body has dovetail grooves on both sides, and the connecting base plates have tenons at their ends that match the dovetail grooves. The prestressed anchor bolt assembly passes through the joint surface between the base plate body and the connecting base plates, and the elastic pad is bonded to the bottom of the base plate body. The curvature adjustment mechanism includes an arc-shaped guide rail and a slider that cooperates with the arc-shaped guide rail. The arc-shaped guide rail is connected to the top surface and / or bottom surface of the base plate body, and the slider is connected to the connecting base plates.

[0006] Furthermore, both the substrate body and the connecting substrate are provided with through positioning holes, and the prestressed anchor bolt assembly is disposed in the positioning holes of the substrate body and the connecting substrate.

[0007] Furthermore, the dovetail grooves on both sides of the substrate body are symmetrically distributed, and the positioning holes of the substrate body penetrate the bottom surface of the paired dovetail grooves; the tenons on both sides of the connecting substrate are symmetrically distributed, and the positioning holes of the connecting substrate penetrate the top surface of the paired tenons.

[0008] Furthermore, the arc-shaped guide rail is detachably connected to the top and / or bottom surface of the substrate body, and the slider is detachably connected to the connecting substrate.

[0009] Furthermore, the top and / or bottom surfaces of the substrate body are provided with screw holes, and the arc-shaped guide rail is connected to the screw holes on the top and / or bottom surfaces of the substrate body by bolts.

[0010] Furthermore, the top and / or bottom surfaces of the connecting substrate are provided with a plurality of screw holes spaced apart, and the slider connects to any one or more of the screw holes on the top and / or bottom surfaces of the connecting substrate.

[0011] Furthermore, the fit tolerance between the dovetail groove of the substrate body and the tenon of the connecting substrate allows the substrate body and the connecting substrate to form any obtuse angle.

[0012] Furthermore, the elastic pad layer is provided with multiple buffer cavities.

[0013] Furthermore, the volume of the buffer cavity of the elastic pad decreases from the edge to the center.

[0014] In this invention, the modular cooperation of dovetail groove and tenon and the rigid connection of prestressed anchor bolt group realize the rapid assembly and stable docking of the base plate body and the connecting base plate. The elastic pad layer reduces the transmission of track vibration, and the curvature adjustment mechanism enables the base plate structure to flexibly adapt to the construction requirements of different track shapes, thereby improving construction efficiency and track smoothness.

[0015] In this invention, a detachable arc-shaped guide rail and slider connection method is adopted, which allows for flexible adjustment of the guide rail installation position according to actual construction needs. This facilitates the construction of track bases with different curvature radii, while also enabling rapid replacement and maintenance of components, reducing construction costs and increasing equipment reuse rate.

[0016] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0018] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0019] In the picture:

[0020] 1-Substrate body; 11-Dovetail groove; 2-Connecting substrate; 21-Tongue; 3-Curvature adjustment mechanism; 31-Arc guide rail; 32-Slider; 4-Elastic pad. Detailed Implementation

[0021] In the description of this embodiment, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, the use of terms such as "first," "second," etc., can explicitly or implicitly include at least one of those features, that is, include one or more of those features.

[0022] In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "setting," 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 expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1As shown, this utility model provides a subway track foundation construction device. The device includes a base plate body 1, a prestressed anchor bolt assembly, an elastic pad 4, a curvature adjustment mechanism 3, and at least two connecting base plates 2. The base plate body 1 has dovetail grooves 11 on both sides, and the connecting base plates 2 have tenons 21 at their ends that match the dovetail grooves 11. The prestressed anchor bolt assembly passes through the joint surface between the base plate body 1 and the connecting base plates 2. The elastic pad 4 is bonded to the bottom of the base plate body 1. The curvature adjustment mechanism 3 includes an arc-shaped guide rail 31 and a slider 32 that cooperates with the arc-shaped guide rail 31. The arc-shaped guide rail 31 is connected to the top and / or bottom surface of the base plate body 1, and the slider 32 is connected to the connecting base plates 2. This embodiment achieves rapid assembly and stable connection between the base plate body 1 and the connecting base plates 2 through the modular cooperation of the dovetail grooves 11 and the tenons 21, and the rigid connection of the prestressed anchor bolt assembly. The elastic pad 4 reduces track vibration transmission, and the curvature adjustment mechanism 3 allows the base plate structure to flexibly adapt to the construction requirements of different track alignments, improving construction efficiency and track smoothness.

[0025] According to one embodiment of this utility model, the base plate 1 is a rectangular plate precast from concrete, 3 meters in length. Symmetrically distributed dovetail grooves 11 are machined along its two edges. Each dovetail groove 11 has a groove width of 80 mm and a depth of 50 mm, with a positioning hole penetrating the thickness of the base plate 1 at the bottom. The connecting base plate 2 is a 1.2-meter-long steel component, with tenons 21 at both ends that match the dovetail grooves 11 of the base plate 1. The tenons 21 have a trapezoidal cross-section, and their top width is 2 mm smaller than the opening of the dovetail groove 11 to form a sliding gap. A through hole with a diameter of 30 mm is provided at the central axis of the tenon 21. The prestressed anchor bolt assembly consists of M27 high-strength bolts. The bolt shanks pass through the positioning holes of the base plate 1 and the connecting base plate 2 to apply preload to both. In one embodiment, a disc spring washer can be provided on the bolt head to compensate for preload loss caused by construction vibration.

[0026] According to one embodiment of the present invention, dovetail grooves 11 are symmetrically distributed on both sides of the substrate body 1. In this embodiment, five dovetail grooves 11 are provided on each side of the substrate body, thus providing a total of five pairs of dovetail grooves 11. Each pair of dovetail grooves 11 is located on the same horizontal plane, and the positioning holes of the substrate body 1 penetrate the bottom surface of the paired dovetail grooves 11. Similarly, tenons 21 are symmetrically distributed on both sides of the connecting substrate 2, and the positioning holes of the connecting substrate 2 penetrate the top surface of the paired tenons 21. The arc-shaped guide rail 31 is bolted to the top surface and / or bottom surface of the substrate body 1, and the slider 32 is bolted to the connecting substrate 2. The top surface and / or bottom surface of the substrate body 1 are provided with screw holes, and the arc-shaped guide rail 31 is bolted to the screw holes on the top surface and / or bottom surface of the substrate body 1. The top surface and / or bottom surface of the connecting substrate 2 are provided with multiple screw holes spaced apart, and the slider 32 connects to any one or more screw holes on the top surface and / or bottom surface of the connecting substrate 2.

[0027] According to one embodiment of this utility model, a positioning hole is provided on the bottom surface of the dovetail groove 11 of the substrate body 1, and a stainless steel sleeve is pre-embedded in the hole to prevent concrete abrasion. A corresponding positioning hole is provided on the top of the tenon 21 of the connecting substrate 2. During installation, the operator slides the tenon 21 of the connecting substrate 2 into the substrate body 1 along the dovetail groove 11. After the end of the tenon 21 contacts the limiting stop, a special hole-aligning tool is used to ensure that the axis of the positioning hole of the substrate body 1 and the connecting substrate 2 coincides. Then, a prestressed anchor bolt is inserted and tightened. This design allows the substrate body 1 and the connecting substrate 2 to form any obtuse angle in the horizontal plane, meeting the minimum turning radius requirement of curved tracks.

[0028] According to one embodiment of this utility model, the curvature adjustment mechanism 3 includes an arc-shaped guide rail 31 and a slider 32. The arc-shaped guide rail 31 is an arc-shaped track made of steel plate, and threaded holes are welded to the back of the guide rail at intervals. An array of bolt sleeves is pre-embedded on the top surface of the base plate body 1. During construction, the guide rail with the corresponding curvature is selected according to the design curvature, and the guide rail is fixed to the sleeves at the designated positions on the top surface of the base plate body 1 by hexagonal head bolts. The slider 32 includes a cast steel slider 32 body and a polyurethane damping layer covering the cast steel slider 32 body. The slider 32 is embedded in a groove and is bolted to the bottom surface of the connecting base plate 2. After the operator pushes the connecting base plate 2 to slide along the guide rail to the target position, the relative position of the slider 32 and the guide rail is locked by a positioning pin.

[0029] According to one embodiment of this utility model, the elastic pad layer 4 is made of rubber. The pad layer is 25 mm thick, and its surface is molded to form honeycomb-shaped buffer cavities. The cavities near the edge of the substrate body 1 have a diameter of 10 mm and a depth of 8 mm, while the cavities in the central area have a diameter increased to 15 mm and a depth decreased to 5 mm, forming a gradient buffer structure. The bottom of the pad layer is coated with epoxy resin adhesive, and during construction, it is bonded to the concrete bottom surface of the substrate body 1 using a hot-pressing process. A 20 mm wide sealing tape is applied at the edges to prevent moisture penetration.

[0030] According to one embodiment of this utility model, the clearance between the dovetail groove 11 and the tenon 21 is controlled within 100 mm, and a 3 mm thick wear-resistant nylon liner is pasted on the inner wall of the groove. The diameter of the positioning hole is 1.5 mm larger than the diameter of the anchor bolt, and a bushing is installed in the hole to reduce friction loss. This clearance design allows the connecting base plate 2 to deflect relative to the base plate body 1 to meet the positioning requirements during construction on curved sections, while maintaining the overall structural stability through the rigid constraint of the prestressed anchor bolt.

[0031] According to one embodiment of this utility model, the installation process of the curvature adjustment mechanism 3 is specified in two stages. The first stage is the pre-installation of the guide rail: before construction, select an arc-shaped guide rail 31 that meets the requirements according to the design drawings, and fix the guide rail to the top surface of the base plate body 1 according to the specified density. The second stage is the positioning of the slider 32: loosen the locking nut of the slider 32, push the connecting base plate 2 to slide along the guide rail to the target scale position, correct the spatial coordinates of the connecting base plate 2 with a laser positioning instrument, tighten the locking nut, and finally insert the anti-reverse pin to complete the fixation.

[0032] According to one embodiment of this utility model, the modular expansion scheme of the connecting base plate 2 is specifically implemented as follows: during construction on straight sections, standard length connecting base plates 2 are used for end-to-end connection; during construction on curved sections, non-standard connecting base plates 2 of different lengths are selected according to the radius of curvature. All connecting base plates 2 are uniformly equipped with standardized interfaces at both ends, with cable channels and grouting pipe holes reserved at the interfaces. During construction, operators complete the electrical connection of the base plate units using a quick-connect device, and simultaneously perform gap grouting using mobile grouting equipment.

[0033] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A subway track foundation construction device, characterized in that, include: The substrate body comprises a prestressed anchor bolt assembly, an elastic pad, a curvature adjustment mechanism, and at least two connecting substrates. The substrate body has dovetail grooves on both sides, and the connecting substrates have tenons at their ends that match the dovetail grooves. The prestressed anchor bolt assembly passes through the joint surface between the substrate body and the connecting substrates. The elastic pad is bonded to the bottom of the substrate body. The curvature adjustment mechanism includes an arc-shaped guide rail and a slider that cooperates with the arc-shaped guide rail. The arc-shaped guide rail is connected to the top surface and / or bottom surface of the substrate body, and the slider is connected to the connecting substrate.

2. The subway track bed construction apparatus according to claim 1, wherein Both the substrate body and the connecting substrate are provided with through positioning holes, and the prestressed anchor bolt assembly is disposed in the positioning holes of the substrate body and the connecting substrate.

3. The subway track bed construction apparatus according to claim 2, wherein The dovetail grooves on both sides of the substrate body are symmetrically distributed, and the positioning holes of the substrate body penetrate the bottom surface of the paired dovetail grooves; the tenons on both sides of the connecting substrate are symmetrically distributed, and the positioning holes of the connecting substrate penetrate the top surface of the paired tenons.

4. The subway track bed construction apparatus according to claim 1, wherein The arc-shaped guide rail is detachably connected to the top and / or bottom surfaces of the substrate body, and the slider is detachably connected to the connecting substrate.

5. The subway track bed construction apparatus according to claim 4, wherein The top and / or bottom surfaces of the substrate body are provided with screw holes, and the arc-shaped guide rail is connected to the screw holes on the top and / or bottom surfaces of the substrate body by bolts.

6. The subway track bed construction apparatus according to claim 4, wherein The top and / or bottom surfaces of the connecting substrate are provided with a plurality of screw holes spaced apart, and the slider connects to any one or more of the screw holes on the top and / or bottom surfaces of the connecting substrate.

7. The subway track foundation construction device according to any one of claims 1 or 4, characterized in that, The fit tolerance between the dovetail groove of the substrate body and the tenon of the connecting substrate allows the substrate body and the connecting substrate to form any obtuse angle.

8. The subway track bed construction apparatus according to claim 1, wherein The elastic pad layer has multiple buffer cavities.

9. The subway track bed construction apparatus according to claim 8, wherein The volume of the buffer cavity of the elastic pad decreases from the edge to the center.

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