A method and device for simulating concealed defects between layers of a ballastless track

Abstract

This invention relates to a method and apparatus for simulating hidden defects between layers of ballastless track, belonging to the field of rail transit technology. The invention decomposes a first track slab into multiple segmented track slabs, removes one or more of these segments, and replaces them with a second track slab pre-defined to simulate defect types, degrees, and locations. The defects in the second track slab can be hidden defects between layers of different types. By using multiple second track slabs with different defect types and degrees, simultaneous simulation of hidden defects between layers of ballastless track of different types, degrees, and locations can be achieved. This method enables experimental simulation of various hidden defects. The invention pre-sets a very small hidden defect between layers, and then observes its continuous expansion through experiments until the entire interlayer fails due to voiding or the ballastless track slab arches, thereby enabling experimental research on the incubation and disaster-causing evolution mechanism of different hidden defects between layers.

Description

Technical Field

[0001] This invention belongs to the field of rail transit technology, specifically a method and device for simulating hidden defects between ballastless track layers. Background Technology

[0002] Ballastless track structures are the most widely used track structure type in high-speed railways, mainly including CRTSⅠ type slab ballastless track, CRTSⅡ type slab ballastless track, CRTSⅢ type slab ballastless track, and CRTSⅠ type twin-block ballastless track. These ballastless track structures are primarily composed of vertically multi-layered concrete structures such as ballastless track slabs, buffer layers, and support layers. Because the ballastless track slabs are precast, while the buffer and support layers are cast-in-place, and each layer has different material properties, the interfaces between different vertical layers are the weakest points in the ballastless track structure. Their bonding performance is crucial to the long-term performance of the ballastless track structure. Under the influence of environmental factors (such as temperature, solar radiation, and rain) and train loads, hidden defects such as gaps, voids, and mud pumping at the interfaces between ballastless track layers can easily occur, posing potential threats to train comfort and safety.

[0003] Because these existing hidden defects are located inside the ballastless track structure, it is difficult to conduct accurate experimental simulations. Furthermore, it is even more difficult to simulate different hidden defects on a single ballastless track structure. Therefore, it is impossible to reproduce the entire evolutionary process of hidden defects from their inception and development to their eventual disaster, making it difficult to accurately assess the mechanism and impact of hidden defects.

[0004] Therefore, there is an urgent need to design an experimental simulation method for hidden defects between ballastless track layers to solve the problem of unclear mechanism of the development and evolution of hidden defects between ballastless track layers. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for simulating hidden defects between ballastless track layers, in order to solve the technical problems of existing hidden defects being located inside the ballastless track structure, making it difficult to achieve accurate experimental simulation, and making it difficult to simulate different hidden defects on a single ballastless track structure. Therefore, it is impossible to reproduce the entire evolution process of hidden defects from incubation, emergence, development to disaster, and the mechanism and impact of hidden defects are difficult to accurately assess.

[0006] Therefore, the present invention provides a method for simulating hidden defects between layers of ballastless track, comprising:

[0007] The hidden interlayer defects of the ballastless track to be simulated are identified as the type, degree, and location of the defects to be simulated.

[0008] The intact first track slab is decomposed into n segment track slabs, and the length of each segment track slab is 1 / n of the length of the whole first track slab.

[0009] Remove any one or more segments of the first track bed from the first track bed and move them away;

[0010] The hidden defects between the ballastless track layers of one or more second track slabs are preset as the type, degree, and location of the defects to be simulated. The length of the second track slab is equal to the length of any one or more segment track slabs.

[0011] The second track bed is transported from outside the test site to the designated test location, and then the second track bed is replaced to the original location of any one or more segment track bed boards. The two ends of the second track bed are connected to the adjacent segment track bed boards, or the two ends of the second track bed are connected to the adjacent track bed board and the adjacent segment track bed board.

[0012] Concrete was poured onto the first reassembled bed slab.

[0013] This invention involves decomposing a first track slab into multiple segmented track slabs, removing one or more of these segmented slabs, and replacing them with a second track slab containing a preset type and degree of defect to be simulated. The defects in the second track slab can be hidden defects between different layers. This method enables experimental simulation of different hidden defects and allows for experimental research on the disaster-causing evolution mechanism of these hidden defects.

[0014] In a more preferred embodiment, when the hidden defects between the ballastless track layers of one or more second track slabs are preset as the type, degree, and location of the defects to be simulated, the defect types, degree, and locations of the defects to be simulated are different for the multiple second track slabs.

[0015] By pre-setting multiple second bed boards with different defect types and degrees, it is possible to simultaneously simulate hidden defects between ballastless track layers of different types and degrees.

[0016] In a more preferred embodiment, the hidden defects between the ballastless track layers of one or more second track slabs are preset as the type, degree, and location of the defects to be simulated, including: setting pads of different heights on track slabs with hidden defects of smaller width to simulate hidden defects of larger width.

[0017] By laying pads of different heights on the track slab with hidden defects, the width of the hidden defects to be simulated can be flexibly adjusted.

[0018] In a more preferred embodiment, the hidden defects between the ballastless track layers of one or more second track slabs are preset as the type, degree, and location of the defects to be simulated, including: setting thin plates of different areas on track slabs with smaller area ratios to simulate hidden defects with larger area ratios.

[0019] By laying thin plates of different areas on the track slab with hidden defects, the area ratio of the hidden defects to be simulated can be flexibly adjusted.

[0020] In a more preferred embodiment, the types of defects to be simulated include:

[0021] Any one or more of the following: gaps, voids, or mud pumping between the sleeper and the track bed slab;

[0022] Or any one or more of the following: gaps, voids, groove cracks, or mud pumping between the ballastless track slab and the mortar layer / self-compacting concrete;

[0023] Or any one or more of the following: gaps, voids, grooves, or mud pumping between the mortar / self-compacting concrete and the base plate.

[0024] The experimental simulation method for hidden defects between layers of ballastless track of the present invention can be applied to hidden defects of various types and between different layers, and has a wide range of applications.

[0025] In a more preferred embodiment, the location of the defect to be simulated includes any one or more of the following: a corner location, an edge location, an end location, or a location in the middle of the plate.

[0026] The experimental simulation method for hidden defects between ballastless track layers of the present invention can be applied to hidden defects at various locations, and has significant advantages over the existing simulation methods that can only simulate hidden defects inside the ballastless track.

[0027] In a more preferred embodiment, the width of the defect to be simulated is 1mm-20mm, and the area ratio is 1%-100%.

[0028] In a more preferred embodiment, adjacent track slabs and adjacent track segments are connected by steel bars, and the joints between adjacent track slabs and adjacent track segments are filled with concrete or connected by joint blocks.

[0029] This invention involves pre-embedding multiple reinforcing bars at both ends of the track bed slab. These reinforcing bars are staggered, and the reinforcing bars at the ends of adjacent track bed segments are intertwined and tied together. The reinforcing bars are then tensioned, and finally, concrete is poured at the joints to ensure the continuity between track bed segments and the integrity of the entire track bed slab. Alternatively, joint blocks can be used to connect adjacent track bed segments.

[0030] In a more preferred embodiment, a gantry starter is used to remove any one or more segments of the first track bed from the first track bed.

[0031] Using a gantry crane to hoist the slab sections ensures their stability during hoisting and prevents collisions and wear.

[0032] In addition, the present invention also provides a simulation device, comprising: a gantry starter and a track slab with different hidden defects, wherein the track slab with different hidden defects is composed of multiple segmented track slabs connected together, the gantry starter is used to hoist the segmented track slabs, and the track slab with different hidden defects is used to realize the above-mentioned simulation method for interlayer hidden defects of ballastless track.

[0033] Compared with existing technologies, the features and beneficial effects of this invention are as follows: This invention decomposes the first track slab into multiple segmented track slabs, removes one or more of these segmented track slabs, and replaces them with a second track slab that has preset defect types, preset defect degrees, and preset defect locations to be simulated. The defects in the second track slab can be hidden defects between different layers. By using multiple second track slabs with preset defect types and degrees, it is possible to simultaneously simulate hidden defects between ballastless track layers of different types, degrees, and locations. This method enables experimental simulation of different hidden defects and allows for experimental research on the disaster-causing evolution mechanism of different hidden defects between layers. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a structural diagram of multiple track slabs before the intact first track slab is decomposed into n segment track slabs;

[0036] Figure 2 This is a structural diagram of multiple track slabs after the intact first track slab is decomposed into n segment track slabs;

[0037] Figure 3 This is a schematic diagram illustrating the process of disassembling and removing a segment of the first track bed.

[0038] Figure 4 This is a schematic diagram of replacing a second track bed slab with 100% hidden defects between the slab edges and layers with the original location of a segment track bed slab.

[0039] Figure 5 This is a schematic diagram simulating interlayer defects at the corner of a plate.

[0040] Figure 6 This is a schematic diagram simulating interlayer defects in a plate.

[0041] Figure 7 This is a schematic diagram simulating interlayer defects at the edge of the plate.

[0042] Figure 8 This is a schematic diagram simulating interlayer defects at the plate end;

[0043] Figure 9 A schematic diagram illustrating the replacement of interlayer defects in the board with hidden interlayer defects at the board edge;

[0044] Figure 10 This is a schematic diagram showing the different types of hidden interlayer defects in the segmental track slabs of the first track slab.

[0045] Figure 11 This is a schematic diagram showing the connection between adjacent track bed slabs.

[0046] Attached diagram labels: 1-First bed board, 2-Second bed board, 3-Reinforcing steel. Detailed Implementation

[0047] This invention provides a method and apparatus for simulating hidden defects between layers of ballastless track. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0048] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application’s specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when the invention refers to an element as being “connected” or “coupled” to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein may include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0049] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0055] Example 1

[0056] To address the technical problems in existing technologies where hidden defects are located inside the ballastless track structure, making accurate experimental simulation difficult and simulating different hidden defects on a single ballastless track structure impossible, thus failing to reproduce the entire evolutionary process of hidden defects from incubation to disaster, and making it difficult to accurately assess the mechanism and impact of hidden defects, this invention proposes to decompose a single intact track slab into multiple segmented track slabs. One or more of these segmented track slabs are then removed, and one or more defective track slabs, pre-defined with the type, degree, and location of the defects to be simulated, replace the single or multiple segmented track slabs in the intact track slab. The multiple defective track slabs have different defect types, degrees, and locations, thereby enabling the simultaneous simulation of multiple different defect types, degrees, and locations on a single track slab. This allows for experimental research on the incubation and disaster-causing evolution mechanism of hidden defects between different layers.

[0057] The following describes in detail the experimental simulation method for hidden defects between layers of ballastless track according to the present invention, which includes:

[0058] S1. Determine the type, degree, and location of the hidden defects between layers of the ballastless track to be simulated.

[0059] The types of defects to be simulated include: (1) any one or more of the following: gaps, voids, groove cracks, or mud pumping between the ballastless track slab and the mortar layer / self-compacting concrete; (2) any one or more of the following of the following: gaps, voids, groove cracks, or mud pumping between the mortar layer / self-compacting concrete and the base plate; (3) any one or more of the following of the following: gaps, voids, or mud pumping between the sleeper and the track bed slab.

[0060] The locations of defects to be simulated include plate corner locations (e.g.) Figure 5 As shown), the edge position of the board (e.g.) Figure 7 As shown), plate end position (e.g.) Figure 8 (as shown) or position in the board (e.g.) Figure 6 Any one or more of the following (as shown).

[0061] The width of the defect to be simulated is 1mm-20mm, and the area ratio is 1%-100%, where the area of ​​the gap is the product of the length and width, and the area ratio refers to the ratio of the gap area to the area of ​​the track bed slab segment. In a more preferred embodiment, the width of the defect to be simulated is 1mm-10mm, and the area ratio is 10%-30%.

[0062] S2. Decompose the intact first track bed slab 1 into n segment track bed slabs, and mark each segment track bed slab as ①, ②, ③... The length of each segment track bed slab is 1 / n of the length of the whole first track bed slab 1.

[0063] S3. Remove any one or more segmental track slabs from the first track slab 1 and separate them. Adjacent track slabs and adjacent segmental track slabs are connected by reinforcing bars 3. The joints between adjacent track slabs and adjacent segmental track slabs are filled with concrete or connected by joint blocks. When disassembling the first track slab 1, the reinforcing bars 3 at the ends of adjacent segmental track slabs can be disconnected. In a more preferred embodiment, a gantry crane can be used to lift the segmental track slabs. The gantry crane is a movable gantry starter that can be moved horizontally or tilted from one side, or lifted from the middle. The lifting boom of the gantry crane can extend and retract vertically, and the gantry starter is equipped with hooks for lifting the segmental track slabs.

[0064] S4. Preset the hidden defects between ballastless track layers of one or more second track slabs 2 as the type, degree, and location of the defects to be simulated. The length of the second track slab 2 is equal to the length of any one or more segment track slabs. It should be noted that step S4 can be performed before S1, S2, or S3, as long as S4 is performed before S5. The specific implementation can be adjusted according to the staff's schedule.

[0065] When the hidden defects between the ballastless track layers of multiple second track slabs 2 are preset as the type, degree, and location of defects to be simulated, the defect types, degree, and locations of defects to be simulated will be different for the multiple second track slabs 2.

[0066] The hidden defects between multiple second track slabs 2 are preset as the type, degree, and location of defects to be simulated. This includes setting pads of different heights on track slabs with hidden defects of smaller width to simulate hidden defects of larger width.

[0067] The hidden defects between multiple second track slabs 2 are preset as the types, degrees, and locations of defects to be simulated, including: setting thin plates of different areas on track slabs with smaller area ratios to simulate hidden defects with larger area ratios.

[0068] S5. Transport the second track bed slab 2 from outside the test site to the designated test location, then replace the second track bed slab 2 with any one or more segment track bed slabs in their original positions, and connect both ends of the second track bed slab 2 to the adjacent segment track bed slabs respectively, or connect both ends of the second track bed slab 2 to the adjacent track bed slabs and the adjacent segment track bed slabs respectively.

[0069] S6. Pour concrete on the reassembled first bed board 1.

[0070] Taking a specific implementation method as an example, in this implementation method, such as Figure 1 As shown, three track slabs, A, B, and C, are laid above the sleepers, with track slab B designated as track slab 1. Track slabs A, B, and C are connected by reinforcing bars 3, and concrete is poured at the joints to ensure continuity between adjacent track slabs and the overall integrity of all track slabs. The hidden defect between ballastless track layers to be simulated is determined to be 25% of the gap between the edges of the ballastless track slabs.

[0071] like Figure 2 As shown, the intact first track bed slab 1 is divided into four segments at equal intervals, labeled as ①, ②, ③ and ④ respectively. The length of each segment is 25% of the length of the entire first track bed slab 1.

[0072] like Figure 3 As shown, the reinforcing bars 3 at both ends of the second section of the first track bed slab 1 are disconnected from the reinforcing bars 3 at the ends of the adjacent first section of the track bed slab and the third section of the track bed slab. The gantry starter is placed above the ballastless track. The horizontal lifting rod of the gantry starter is equipped with multiple hooks. When lifting the second section of the track bed slab, each hook is hooked onto a different point on the top of the second section of the track bed slab. The vertical telescopic rod of the gantry starter is shortened, lifting the second section of the track bed slab to a suitable height. The gantry starter moves along the extension direction of the track bed slab, thereby moving the second section of the track bed slab away.

[0073] The hidden defects between the ballastless track layers of the fifth track section, which has the same length as the second track section, are preset to 100% slab edge separation, and are transported from outside the test site to the designated test location.

[0074] like Figure 4 As shown, the track slab of segment ⑤ was replaced in the original position of track slab of segment ②. The reinforcing bars 3 at both ends of track slab ⑤ were then tied and connected to the reinforcing bars 3 at the ends of track slabs of segments ① and ③, respectively. Finally, concrete was poured onto the reassembled track slab B. At this point, the hidden defect between the ballastless track layers of track slab B was 25% edge separation.

[0075] It should be noted that, in addition to the specific implementation methods described above, the ballast slab with hidden defects between ballastless track layers can also be replaced with a ballast slab with hidden defects between ballastless track layers at the edges (e.g., Figure 9 (as shown), or other alternatives, any of which are included within the protection scope of this invention. Figure 10 The four adjacent track slabs in the middle are edge gaps with different degrees of defects.

[0076] The aforementioned experimental simulation method for hidden defects between ballastless track layers allows for the simultaneous simulation of hidden defects of different types, degrees, and locations. This method enables experimental simulation of various hidden defects. The experimental simulation method for hidden defects between ballastless track layers of this invention can pre-set a very small hidden defect, and then observe its continuous expansion through experiments until the ballastless track slab arches or the entire interlayer fails, thereby enabling experimental research on the incubation and disaster-causing evolution mechanism of different hidden defects. Specifically, the incubation and disaster-causing process of hidden defects in this invention is roughly as follows: a very small interlayer gap is set at the end of the track slab. Then, under the action of environment and load, this interlayer gap continuously develops and enlarges, causing interlayer gaps in other locations on the slab. This interlayer gap then enlarges into a void, and interlayer gaps in other locations also continuously develop and enlarge until the entire interlayer fails or the ballastless track slab arches and deforms, leading to a reduction in train speed.

[0077] Example 2

[0078] This invention also provides a simulation device, comprising: a gantry starter and a track slab with different concealed defects. The track slab with different concealed defects is composed of multiple segmented track slabs connected together. Adjacent track slabs and adjacent segmented track slabs are connected by reinforcing bars 3. The joints between adjacent track slabs and adjacent segmented track slabs are filled with concrete or connected by joint blocks, such as... Figure 11 As shown. The gantry starter is used to hoist segmental track slabs, and track slabs with different hidden defects are used to realize the above-mentioned test simulation method for hidden defects between ballastless track layers.

[0079] In summary, this invention provides a method for simulating hidden defects between layers of ballastless track. The invention decomposes the first track slab 1 into multiple segmented track slabs, removes one or more of these segments, and replaces them with a second track slab 2 containing pre-defined defects of different types, degrees, and locations. The defects in the second track slab 2 can be hidden defects between layers. By using multiple second track slabs 2 with different defect types and degrees, simultaneous simulation of hidden defects between layers of ballastless track of different types, degrees, and locations can be achieved. This method enables experimental simulation of various hidden defects. Furthermore, a very small hidden defect can be pre-set, and the experiment can observe its continuous expansion until the entire interlayer fails or the ballastless track slab arches, thereby enabling experimental research on the incubation and disaster-causing evolution mechanism of different hidden defects.

[0080] In addition, the present invention also provides a simulation device for implementing the above-mentioned method for simulating hidden defects in the interlayer of ballastless track.

[0081] Of course, the above description of the embodiments of the present invention is quite detailed, but it should not be construed as a limitation on the scope of protection of the present invention. The present invention may have many other implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A method for simulating a concealed defect test between layers of a ballastless track, characterized in that The method comprises the following steps: determining the concealed defects between the layers of the ballastless track to be simulated as the defect type to be simulated, the defect degree to be simulated, and the defect position to be simulated; decomposing the intact first track bed plate into n segment track bed plates, and the length of each segment track bed plate accounts for 1 / n of the length of the whole first track bed plate; removing any one or more segment track bed plates from the first track bed plate; presetting the concealed defects between the layers of the ballastless track of one or more second track bed plates as the defect type to be simulated, the defect degree to be simulated, and the defect position to be simulated, and the length of the second track bed plate is equal to the length of the one or more segment track bed plates; transporting the second track bed plate from the test site to the designated test position, replacing the second track bed plate to the original position of the one or more segment track bed plates, and connecting the two ends of the second track bed plate with the adjacent segment track bed plates respectively, or connecting the two ends of the second track bed plate with the adjacent track bed plates and the adjacent segment track bed plates respectively; pouring concrete on the reassembled first track bed plate.

2. The method according to claim 1, wherein The defect type to be simulated, the defect degree to be simulated, and the defect position to be simulated of the one or more second track bed plates are different.

3. The method according to claim 1, wherein The presetting the concealed defects between the layers of the ballastless track of one or more second track bed plates as the defect type to be simulated, the defect degree to be simulated, and the defect position to be simulated comprises: setting different height of the shims on the track bed plate with the concealed defects of smaller width to simulate the concealed defects of larger width.

4. The method according to claim 1, wherein The presetting the concealed defects between the layers of the ballastless track of one or more second track bed plates as the defect type to be simulated, the defect degree to be simulated, and the defect position to be simulated comprises: setting different area of the thin plates on the track bed plate with the concealed defects of smaller area ratio to simulate the concealed defects of larger area ratio.

5. The method according to claim 1, wherein The defect type to be simulated comprises: any one or more of the separation, void, or heaving and mud pumping between the sleeper and the track bed plate; or any one or more of the separation, void, concave-convex groove cracking, or heaving and mud pumping between the ballastless track plate and the mortar layer / self-compacting concrete; or any one or more of the separation, void, concave-convex groove cracking, or heaving and mud pumping between the mortar layer / self-compacting concrete and the base plate.

6. The method according to claim 1, wherein the method is characterized by: The defect position to be simulated comprises any one or more of the corner position, the edge position, the end position, or the middle position.

7. The method according to claim 3, characterized in that: The parameter corresponding to the defect degree to be simulated comprises: the width of 1mm-20mm.

8. The method according to claim 4, characterized in that: The parameter corresponding to the defect degree to be simulated comprises: the area ratio of 1%-100%.

9. The method according to claim 1, characterized in that: The adjacent track bed plates and the adjacent segment track bed plates are connected through the steel bars, and the joints between the adjacent track bed plates and the joints between the adjacent segment track bed plates are poured with concrete or connected through the joint blocks.

10. The method according to claim 1, characterized in that: The any one or more segment track bed plates in the first track bed plate are removed from the first track bed plate by using the portal starter.

11. An analog device characterized by The method comprises the following steps: The door type launching machine and the track bed plate with different hidden defects connected by a plurality of segment track bed plates, the door type launching machine is used for hoisting the segment track bed plate, and the track bed plate with different hidden defects is used for realizing the test simulation method of the hidden defects between layers of the ballastless track as claimed in any one of claims 1-10.

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