A method for replacing the overall steel tube concrete pillow ballastless roadbed

Abstract

The present invention discloses a method for replacing a steel tube concrete pillow type ballastless roadbed as a whole, which belongs to the field of railway track technology and is used to replace a defective steel tube concrete pillow type ballastless roadbed. The method comprises the following steps: inspecting the ballastless roadbed and determining the area to be replaced; removing the roadbed concrete above the bottom end surface of the sleepers in the area to be replaced and installing longitudinal reinforcing connectors; removing the roadbed concrete below the bottom end surface of the sleepers in the area to be replaced and installing transition supports; preparing replacement rails; moving the rails to be replaced out of the area to be replaced and installing the replacement rails in the area to be replaced; and recasting the roadbed in the area to be replaced. The present invention provides a method for replacing a steel tube concrete pillow type ballastless roadbed as a whole, which is capable of completing the rapid and accurate treatment of the defective track when defects occur in the steel tube concrete pillow type ballastless roadbed, and ensuring driving safety without affecting traffic during time periods outside the construction window period, without requiring more complicated transition measures.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway tracks, and in particular relates to a method for integrally replacing a steel tube concrete pillow type ballastless roadbed. Background Art

[0002] my country has a vast territory and a complex railway environment. As railway mileage and service life increase, many lines are experiencing problems with their underlying foundations, such as bridge and tunnel settlement and roadbed shifting. High-speed railways and intercity and suburban railways generally utilize ballastless track. This design offers high smoothness, stability, and durability, virtually eliminating the need for frequent maintenance. However, some areas may require ballastless track repair and replacement due to uncontrollable factors such as geological changes and subgrade settlement.

[0003] Steel tube concrete sleeper ballastless track is cast with steel tube concrete sleepers. Steel tube concrete sleepers have good rigidity and stability, so prefabricated steel tube concrete sleepers are widely used in ballastless track. However, in the existing technology, the maintenance and replacement of steel tube concrete sleeper ballastless track bed is often affected by the steel tube connection characteristics of the steel tube concrete sleepers themselves. The construction progress of removing the sleeper products one by one is slow and the construction period is long. It is usually difficult to complete the rapid replacement of the connected steel tube concrete sleeper ballastless track bed within a construction window period, which in turn affects the passage of vehicles outside the construction window period. Summary of the Invention

[0004] In response to one or more of the above-mentioned defects or improvement needs in the prior art, the present invention provides a method for the overall replacement of a steel tube concrete pillow type ballastless track bed, which can quickly and accurately treat the diseased track when defects occur in the steel tube concrete pillow type ballastless track bed, and ensure driving safety while not affecting traffic during time periods outside the construction window period, without the need for more complicated transition measures.

[0005] To achieve the above-mentioned object, the present invention provides a method for replacing a defective steel tube concrete pillow ballastless roadbed, comprising the following steps:

[0006] S1. Detecting the ballastless roadbed to determine the ballastless roadbed in the area to be replaced where the defect occurs;

[0007] S2. Clear the roadbed concrete above the bottom end surface of the sleeper in the area to be replaced, and install longitudinal reinforcement connectors on the exposed steel pipes;

[0008] S3, removing the roadbed concrete below the bottom end surface of the sleeper in the area to be replaced, and installing the transition support member on the bottom end surface of the sleeper to form the rail row to be replaced;

[0009] S4, preparing a replacement rail with the same structure as the rail to be replaced according to the area to be replaced;

[0010] S5, moving the rail row to be replaced out of the area to be replaced, and installing the replacement rail row in the area to be replaced;

[0011] S6. Set up formwork around the area to be replaced, and vibrate after injecting concrete to complete the replacement of the ballastless track bed in the area to be replaced.

[0012] As a further preferred embodiment of the present invention, S2 comprises the following steps:

[0013] S21. Marking the position of the steel pipe on the roadbed concrete;

[0014] S22, clearing the roadbed concrete around the steel pipe in batches;

[0015] S23, connecting all the steel pipes in the area to be replaced longitudinally using at least one longitudinal reinforcing connector;

[0016] S24, removing all the remaining roadbed concrete above the bottom end surface of the sleeper in the area to be replaced in batches.

[0017] As a further preferred embodiment of the present invention, the longitudinal length of the area to be replaced is greater than the length of the longitudinal reinforcing connector, and at least two longitudinal reinforcing connectors are arranged in sequence along the longitudinal direction in the area to be replaced, and the longitudinal lengths of two adjacent longitudinal reinforcing connectors partially overlap.

[0018] As a further preferred embodiment of the present invention, the longitudinal reinforcing connector includes a first steel beam and a second steel beam arranged opposite to each other, and the first steel beam and the second steel beam are provided with a plurality of screw holes and a plurality of semicircular grooves arranged opposite to each other, which are used for longitudinal positioning and connection of the steel pipes between the plurality of sleepers.

[0019] As a further preferred embodiment of the present invention, S3 includes the following steps:

[0020] S31, partially removing the roadbed concrete below the bottom end surface of all the sleepers in the area to be replaced;

[0021] S32, arranging temporary supports in the area where the roadbed concrete has been cleared;

[0022] S33, removing the remaining track bed concrete below the bottom end surface of the sleeper, and exposing the gate-shaped steel bars at the bottom end of the sleeper;

[0023] S34. Arrange two groups of transition support members longitudinally below the bottom end surfaces of the sleepers on both sides of the area to be replaced, and fixedly connect them to the bottom end surfaces of the sleepers to form the rail row to be replaced.

[0024] As a further preferred embodiment of the present invention, the transition support is a third steel beam of an inverted T-shaped structure, which is arranged under the bottom end surface of the sleeper and is used to support the sleepers in the area to be replaced after the roadbed concrete is completely removed.

[0025] As a further preferred embodiment of the present invention, a transversely penetrating screw hole is provided at the top end of the third steel beam, and a long bolt is provided corresponding to the screw hole for fixedly connecting the bottom end surface of the sleeper and the third steel beam.

[0026] As a further preferred embodiment of the present invention, the depth of the roadbed concrete below the bottom end surface of the sleeper reaches the bridge surface of the bridge section, the concrete base surface of the roadbed section, and the tunnel backfill layer surface of the tunnel section.

[0027] As a further preferred embodiment of the present invention, a bolt connection is provided between the transition support and the bridge surface, the concrete base surface or the tunnel backfill layer surface.

[0028] As a further preferred embodiment of the present invention, S5 includes the following steps:

[0029] S51, disconnecting the rails in the area to be replaced from the rails outside the area to be replaced;

[0030] S52, moving the rails to be replaced in the area to be replaced out of the area to be replaced;

[0031] S53: Install the replacement rail in the area to be replaced, and connect the rails on the replacement rail to the rails outside the area to be replaced.

[0032] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0033] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0034] (1) The present invention provides a method for replacing a steel tube concrete sleeper ballastless track bed as a whole. The method accurately detects the ballastless track bed and precisely determines the area of the ballastless track bed to be replaced where there are defects. The method first removes the track bed concrete above the bottom end face of the sleepers in the area to be replaced and sets longitudinal reinforcing connectors. This method not only enables the track bed to be broken in the area to be replaced, but also ensures the structural strength of the ballastless track outside the construction window period, thereby ensuring traffic safety. At the same time, the method removes the track bed concrete below the bottom end face of the sleepers in the area to be replaced and sets transition supports, thereby ensuring the structural strength of the ballastless track outside the construction window period, thereby further ensuring traffic safety.

[0035] (2) The present invention provides a method for replacing a steel tube concrete sleeper ballastless track bed as a whole. The method ...

[0036] (3) The overall replacement method of a steel tube concrete sleeper ballastless track bed in the present invention has a simple process, high reliability and wide application. The ballastless track bed is accurately divided into areas to be replaced by detecting the ballastless track bed, and the removal of the track bed concrete above the bottom end face of the sleepers in the area to be replaced and the installation of the longitudinal reinforcement connectors are controlled within a construction window period, the removal of the track bed concrete below the bottom end face of the sleepers and the installation of the transition support members are controlled within a window period, and the removal and installation of the track to be replaced and the replacement track are controlled within a window period. Therefore, it is possible to ensure that the ballastless track has sufficient structural strength within the time period outside the window period, thereby effectively ensuring the safety of traffic, simplifying the replacement process of the ballastless track bed, and having excellent economic benefits and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a method for integrally replacing a steel tube concrete pillow ballastless roadbed in the present invention;

[0038] Figure 2 This is a top view of the assembly of the steel tube concrete pillow type ballastless roadbed in the present invention;

[0039] Figure 3 This is a cross-sectional view of the assembly of the steel tube concrete pillow type ballastless roadbed in the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the longitudinal reinforcement connector in the present invention;

[0041] Figure 5 This is a schematic diagram of the third steel beam structure in the present invention;

[0042] Figure 6 Schematic diagram of the rail to be replaced moving out of the area to be replaced in the present invention;

[0043] Figure 7 It is a schematic diagram of the replacement rail array in the present invention being installed into the area to be replaced.

[0044] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0045] 1. Sleepers; 2. Steel pipes; 3. Gate-shaped steel bars; 4. Longitudinal reinforcement connectors; 41. First steel beam; 42. Second steel beam; 5. Third steel beam; 6. Rails to be replaced; 7. Replacement rails. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0051] Example:

[0052] like Figures 1 to 7 As shown in , the method for rapid replacement of steel tube concrete pillow ballastless track in the preferred embodiment of the present application can quickly and accurately handle the defective track when defects occur in the steel tube concrete pillow ballastless track, and ensure driving safety without affecting traffic during time periods outside the construction window period, without the need for more complicated transition measures.

[0053] Specifically, if Figure 1 As shown in , the method for rapid replacement of steel tube concrete pillow ballastless roadbed includes the following steps:

[0054] S1. Inspect the ballastless roadbed to identify the ballastless roadbed in the area to be replaced where there are defects.

[0055] S2. Clear the roadbed concrete above the bottom end surface of the sleeper 1 in the area to be replaced, and install the longitudinal reinforcement connector 4 on the exposed steel pipe 2;

[0056] Preferably, the removal of the roadbed concrete above the bottom end surface of the sleeper 1 and the installation of the longitudinal reinforcement connector 4 are completed within a window period. At this time, although part of the roadbed concrete is removed, the presence of the longitudinal reinforcement connector 4 and the roadbed concrete below the bottom end surface of the sleeper 1 can ensure the structural strength of the ballastless track, thereby ensuring the safety of traffic.

[0057] S3, clearing the roadbed concrete below the bottom end surface of the sleeper 1 in the area to be replaced, and installing the transition support member on the bottom end surface of the sleeper 1 to form the rail row 6 to be replaced;

[0058] Preferably, the removal of the roadbed concrete below the bottom end surface of the sleeper 1 and the installation of the transition support are completed within one window period. Since longitudinal reinforcing connectors 4 and transition supports below the bottom end surface of the sleeper 1 are provided between the sleepers 1 in the area to be replaced at this time, the structural strength of the ballastless track can be effectively guaranteed, thereby ensuring the safety of traffic.

[0059] S4, preparing a replacement rail 7 with the same structure as the rail 6 to be replaced according to the area to be replaced;

[0060] S5, move the rail row 6 to be replaced out of the area to be replaced, and install the replacement rail row 7 in the area to be replaced;

[0061] Preferably, the removal of the rail row 6 to be replaced and the installation of the replacement rail row 7 are completed within one skylight period.

[0062] S6. Set up formwork around the area to be replaced, and vibrate after injecting concrete to complete the replacement of the ballastless track bed in the area to be replaced.

[0063] Furthermore, if Figure 2 、 3 As shown in , in a preferred embodiment of the present application, S2 includes the following steps:

[0064] S21. Mark the position of the steel pipe 2 on the roadbed concrete;

[0065] S22, clearing the roadbed concrete around the steel pipe 2 in batches;

[0066] S23, using at least one longitudinal reinforcing connector 4 to connect all the steel pipes 2 in the area to be replaced in the longitudinal direction;

[0067] S24. Remove all remaining roadbed concrete above the bottom end surface of the sleeper 1 in the area to be replaced in batches.

[0068] Preferably, after removing the remaining roadbed concrete above the bottom end surface of the sleeper 1, a powerful blower is used to blow away the dust on the roadbed.

[0069] Further preferably, in the preferred embodiment of the present application, the depth of the roadbed concrete below the bottom end surface of the sleeper 1 reaches the bridge surface of the bridge section, the concrete base surface of the roadbed section, and the tunnel backfill layer surface of the tunnel section.

[0070] Furthermore, in a preferred embodiment of the present application, the longitudinal length of the area to be replaced is greater than the length of the longitudinal reinforcing connector 4, and at least two longitudinal reinforcing connectors 4 are arranged in sequence along the longitudinal direction in the area to be replaced, and the longitudinal lengths of two adjacent longitudinal reinforcing connectors 4 partially overlap.

[0071] More preferably, Figure 4As shown in , in a preferred embodiment of the present application, the longitudinal reinforcing connector 4 includes a first steel beam 41 and a second steel beam 42. The first steel beam 41 and the second steel beam 42 are provided with a plurality of screw holes and a plurality of semicircular grooves arranged relatively to each other. In actual use, the second steel beam 42 is first arranged longitudinally below the steel pipe 2, and then the first steel beam 41 is placed correspondingly above the second steel beam 42 so that the steel pipe 2 can be accurately stuck in the semicircular groove. Finally, the first steel beam 41 and the second steel beam 42 are locked as a whole by bolts, thereby completing the longitudinal reinforced connection of the plurality of steel pipes 2. Preferably, the semicircular radius of the semicircular groove is the same as the radius of the steel pipe 2, so as to ensure that the outer wall of the steel pipe 2 can be in close contact with the inner wall of the semicircular groove, thereby ensuring the longitudinal positioning reinforcement of the two adjacent sleepers 1.

[0072] In more detail, in a preferred embodiment of the present application, the length of the longitudinal reinforcing connector 4 is no greater than the distance between two transverse sleepers 1 , so that the longitudinal reinforcing connector 4 can extend under the steel pipe 2 .

[0073] Furthermore, the longitudinal reinforcing connector 4 is not limited to the above-described form. In another preferred embodiment of the present application, it can also be a steel beam with a semicircular groove, and a semicircular buckle is provided on the semicircular groove. After the steel beam is buckled onto the steel pipe 2, the buckle is opened to retain the steel pipe 2 in the semicircular groove, thereby achieving the positioning of the steel pipe 2. Preferably, the buckle is configured as a hidden structure, that is, a semicircular receiving groove corresponding to the buckle shape is provided in the semicircular groove, and the buckle can be pushed out of the receiving groove.

[0074] Further preferably, in the preferred embodiment of the present application, a magnetic attraction point is provided in the semicircular groove to assist in the auxiliary positioning of the semicircular groove and the steel pipe 2 .

[0075] Furthermore, in a preferred embodiment of the present application, S3 includes the following steps:

[0076] S31, partially removing the roadbed concrete below the bottom end surface of all sleepers 1 in the area to be replaced;

[0077] S32. Arrange temporary supports in areas where the roadbed concrete has been removed;

[0078] S33, removing the remaining roadbed concrete below the bottom end surface of the sleeper 1 and exposing the gate-shaped steel bar 3 at the bottom end of the sleeper 1;

[0079] S34. Arrange two groups of transition support members longitudinally below the bottom end surfaces of the sleepers 1 on both sides of the area to be replaced, and fix them to the bottom end surfaces of the sleepers 1 to form the rail row 6 to be replaced.

[0080] More preferably, Figure 2 、 3As shown in Figure 5, the transition support is a third steel beam 5 of an inverted T-shaped structure, and a transverse screw hole is provided at the top end of the third steel beam 5 corresponding to the gate-shaped steel bar 3, and a corresponding long bolt is provided. In actual use, the top end of the third steel beam 5 is set between the gate-shaped steel bars 3 at the bottom end face of the sleeper 1, and then the long bolt is set to pass through the two gate-shaped steel bars 3 and the screw hole, and nuts are set on both sides of the two gate-shaped steel bars 3 to achieve fastening, thereby completing a stable connection between the third steel beam 5 and the sleeper 1.

[0081] In more detail, in a preferred embodiment of the present application, the top end of the third steel beam 5 is a telescopic structure, so that the third steel beam 5 can extend into the bottom end surface of the sleeper 1 in a retracted state. When reaching the specified position, the top end of the third steel beam 5 is raised until it abuts against the bottom end surface of the sleeper 1, and then the top end of the third steel beam 5 is fixed, thereby achieving support for multiple sleepers 1. Preferably, the top end of the third steel beam 5 adopts an embedded telescopic block structure, and the telescopic block is correspondingly provided with a positioning pin hole and an adjustment rod. Correspondingly, a positioning pin hole is also provided on the third steel beam 5. In actual use, the vertical position of the telescopic block is adjusted by driving the adjustment rod, and then the positioning pins are provided in the two positioning pin holes to complete the position limiting of the telescopic block.

[0082] Furthermore, in a preferred embodiment of the present application, the temporary support is a U-shaped channel steel. During actual use, the roadbed concrete on the transverse inner side of the sleeper 1 is first removed, and then the U-shaped channel steel is arranged vertically with the groove facing the transverse outer side of the sleeper 1. Then, the remaining roadbed concrete is broken, and finally, the transition support is installed under the bottom end surface of the sleeper 1 from the transverse outer side of the sleeper 1.

[0083] Further preferably, in a preferred embodiment of the present application, a friction groove is provided on the bottom end surface of the transition support to increase the stability of the transition support.

[0084] In more detail, in a preferred embodiment of the present application, a connection structure such as a bolt connection is provided between the transition support and the bridge surface, the concrete base surface or the tunnel backfill layer surface to enhance the stability of the transition support.

[0085] Furthermore, if Figure 6 、 7 As shown in , in a preferred embodiment of the present application, S5 includes the following steps:

[0086] S51, disconnecting the rails in the area to be replaced from the rails outside the area to be replaced;

[0087] S52, moving the rail row 6 to be replaced in the area to be replaced out of the area to be replaced;

[0088] Preferably, at least two strands of steel wire rope are used to bundle the rail strip 6 to be replaced or the replacement rail strip 7, and the rail strip 6 to be replaced or the replacement rail strip 7 is hoisted by a crane.

[0089] S53, installing the replacement rail row 7 in the area to be replaced, and connecting the rails on the replacement rail row 7 to the rails outside the area to be replaced.

[0090] The method for quickly replacing a steel tube concrete sleeper ballastless track bed in the present invention has a simple process, high reliability and wide application. It accurately divides the area to be replaced through the detection of the ballastless track bed, and controls the removal of the track bed concrete above the bottom end surface of the sleeper 1 in the area to be replaced and the setting of the longitudinal reinforcement connector 4 within a construction window period, the removal of the track bed concrete below the bottom end surface of the sleeper 1 and the installation of the transition support within a window period, and the removal and installation of the track 6 to be replaced and the replacement track 7 within a window period. Therefore, it can ensure that the ballastless track has sufficient structural strength within the time period outside the window period, thereby effectively ensuring the safety of traffic, simplifying the replacement process of the ballastless track bed, and having excellent economic benefits and promotion value.

[0091] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for replacing a steel tube concrete pillow ballastless roadbed as a whole, for replacing a defective steel tube concrete pillow ballastless roadbed, characterized in that: The steps include: S1. Detecting the ballastless roadbed to determine the ballastless roadbed in the area to be replaced where the defect occurs; S2. Clear the roadbed concrete above the bottom end surface of the sleeper in the area to be replaced, and install longitudinal reinforcement connectors on the exposed steel pipes; The track bed concrete above the bottom end surface of the sleeper is removed and the installation of the longitudinal reinforcement connector is completed within a skylight period; The longitudinal reinforcement connector includes a first steel beam and a second steel beam arranged opposite to each other, wherein the first steel beam and the second steel beam are provided with a plurality of screw holes and a plurality of semicircular grooves arranged opposite to each other, for positioning and connecting the steel pipes between the plurality of sleepers in the longitudinal direction; The S2 comprises the following steps: S21. Marking the position of the steel pipe on the roadbed concrete; S22, removing the roadbed concrete around the steel pipe in batches; S23, connecting all the steel pipes in the area to be replaced longitudinally using at least one longitudinal reinforcing connector; S24, removing all the remaining roadbed concrete above the bottom end surface of the sleeper in the area to be replaced in batches; S3, removing the roadbed concrete below the bottom end surface of the sleeper in the area to be replaced, and installing the transition support member on the bottom end surface of the sleeper to form the rail row to be replaced; The removal of the roadbed concrete above the bottom end surface of the sleeper and the installation of the transition support are completed within one skylight period; The S3 comprises the following steps: S31, partially removing the roadbed concrete below the bottom end surface of all the sleepers in the area to be replaced; S32, arranging temporary supports in the area where the roadbed concrete has been cleared; S33, removing the remaining track bed concrete below the bottom end surface of the sleeper, and exposing the gate-shaped steel bars at the bottom end of the sleeper; S34, arranging two sets of transition support members longitudinally below the bottom end surfaces of the sleepers on both sides of the area to be replaced, and fixedly connecting them to the bottom end surfaces of the sleepers to form the rail row to be replaced; S4, preparing a replacement rail with the same structure as the rail to be replaced according to the area to be replaced; S5, moving the rail row to be replaced out of the area to be replaced, and installing the replacement rail row in the area to be replaced; The removal of the rail to be replaced and the installation of the replacement rail are completed within one skylight period; S6. Set up formwork around the area to be replaced, and vibrate after injecting concrete to complete the replacement of the ballastless track bed in the area to be replaced.

2. The method for replacing the entire concrete-filled steel tube pillow ballastless roadbed according to claim 1, wherein: The longitudinal length of the area to be replaced is greater than the length of the longitudinal reinforcing connector. At least two longitudinal reinforcing connectors are arranged in sequence along the longitudinal direction in the area to be replaced, and the longitudinal lengths of two adjacent longitudinal reinforcing connectors partially overlap.

3. The method for replacing the entire concrete-filled steel tube pillow ballastless roadbed according to claim 1, wherein: The transition support is a third steel beam of an inverted T-shaped structure, which is arranged under the bottom end surface of the sleeper and is used to support the sleepers in the area to be replaced after the roadbed concrete is completely removed.

4. The method for replacing the entire concrete-filled steel tube pillow ballastless roadbed according to claim 3, wherein: A transversely penetrating screw hole is provided at the top end of the third steel beam, and a long bolt is provided corresponding to the screw hole for fixedly connecting the bottom end surface of the sleeper and the third steel beam.

5. The method for replacing a ballastless track bed of a concrete-filled steel tube pillow type according to any one of claims 1 to 4, wherein: The depth of the roadbed concrete below the bottom end surface of the sleeper is to reach the bridge surface of the bridge section, the concrete base surface of the roadbed section, and the tunnel backfill layer surface of the tunnel section.

6. The method for replacing the entire concrete-filled steel tube pillow ballastless roadbed according to claim 5, wherein: The transition support is connected to the bridge surface, the concrete base surface or the tunnel backfill layer surface by bolts.

7. The method for replacing a ballastless track bed of a concrete-filled steel tube pillow type according to any one of claims 1 to 4 and 6, wherein: The S5 comprises the following steps: S51, disconnecting the rails in the area to be replaced from the rails outside the area to be replaced; S52, moving the rails to be replaced in the area to be replaced out of the area to be replaced; S53: Install the replacement rail in the area to be replaced, and connect the rails on the replacement rail to the rails outside the area to be replaced.

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