Adjustable monolithic inverted arch for solving construction error of ballastless track and construction method thereof

Abstract

This invention relates to an adjustable integrated invert arch for ballastless track and its construction method for resolving construction errors. The adjustable integrated invert arch for ballastless track includes a tunnel invert arch body. The top surface of the tunnel invert arch body has left and right track invert arch reserved grooves. Each track invert arch reserved groove includes two longitudinal invert arch reserved grooves. A high-strength concrete filling layer is poured into the reserved grooves. The rails are fixed to the top surface of short sleepers by fasteners. The lower part of the short sleepers is poured on the upper part of the high-strength concrete filling layer; or, the rails are directly fixed to the upper part of the high-strength concrete filling layer by fasteners. This invention adjusts construction errors through the groove structure and the high-strength concrete filling layer. In curved sections of the line, the position of the cast-in-place sleepers or fasteners is adjusted according to the actual superelevation of the track structure to achieve superelevation matching. This not only improves construction efficiency, saves labor costs, and shortens the construction period, but also enables the adjustment of track superelevation, solving the error problem in the construction process.

Description

Technical Field

[0001] This invention relates to the field of railway tunnel and track engineering technology, specifically to an adjustable ballastless track integrated inverted arch and construction method for solving construction errors. Background Technology

[0002] Precast structures represent the industrialization and green development direction of modern railway construction. Integrated precast invert arch structures are produced using standardized factory methods, ensuring high quality control standards, excellent structural performance, and can be constructed using assembly-style methods. This significantly improves construction efficiency, reduces labor costs, shortens construction time, and yields substantial economic benefits.

[0003] Current ballastless track construction practices employ an integrated inverted arch structure with an integrated rail support platform. The top surface of the inverted arch features an upward-protruding rail support platform, prefabricated as a single unit with the inverted arch body. This design offers higher integration and faster construction speed. However, practice has revealed that this type of integrated inverted arch structure lacks flexibility. After factory fabrication, unavoidable construction errors often exist between the prefabricated components and the actual on-site construction. Because the prefabricated components are an integrated structure, and the rail support platform is an inseparable part of the inverted arch body, the overall structure cannot be adjusted to correct these errors. Furthermore, the outer rail of the track structure requires superelevation in curved sections of the track. For the integrated inverted arch structure with the integrated rail support platform, this same limitation applies if the superelevation needs adjustment.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable integrated inverted arch for ballastless track and a construction method for solving construction errors, so as to solve the problems of poor adaptability, inability to adjust construction errors, and inability to match the superelevation of the outer rail of the track structure in existing structures.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An adjustable integrated ballastless track invert is provided to solve construction errors. The adjustable integrated ballastless track invert includes a tunnel invert body. The top surface of the tunnel invert body has left and right track invert reserved grooves. Each track invert reserved groove includes two longitudinal invert reserved grooves. A high-strength concrete filling layer is poured into the invert reserved groove.

[0008] The rail is fixed to the top surface of the short sleeper by fasteners, and the lower part of the short sleeper is cast on the upper part of the high-strength concrete filling layer;

[0009] Alternatively, the rails can be directly fixed to the upper part of the high-strength concrete filling layer using fasteners.

[0010] Furthermore, the tunnel invert arch body includes a planar top plate and a curved bottom plate, with vertical support ribs provided between the planar top plate and the curved bottom plate.

[0011] Furthermore, the invert arch reserved groove is prefabricated on the surface of the planar top plate, and a connecting steel bar is pre-embedded at the bottom of the groove. The lower part of the connecting steel bar is located inside the planar top plate, and the upper part of the connecting steel bar is embedded in the high-strength concrete filling layer.

[0012] Furthermore, the planar top plate has upwardly protruding tunnel invert splicing surfaces on both sides, and the inner side of the tunnel invert splicing surfaces has an arc-shaped tunnel invert connecting hinge for circumferential connection.

[0013] Furthermore, the top of the longitudinal side of the planar top plate is provided with arc-shaped fixing bolts for longitudinal connection.

[0014] Furthermore, the top of the longitudinal side of the planar top plate is also provided with arc-shaped structural joint reinforcing bars for longitudinal connection.

[0015] Furthermore, the top of the planar top plate is provided with upwardly protruding ballastless track bed protrusions on both sides, and the pre-reserved grooves of the inverted arches of the two tracks are respectively located on the top of the ballastless track bed protrusions on both sides.

[0016] Furthermore, a lifting sleeve is pre-embedded in the top of the planar top plate.

[0017] On the other hand, a construction method for an adjustable ballastless track integrated invert arch, as described above, to address construction errors is provided, the construction method comprising:

[0018] The adjustable ballastless track integrated inverted arch was lifted to the construction operation position;

[0019] By using fixing bolts and tunnel invert arch connecting hinges, the adjustable ballastless track integrated invert arch is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure.

[0020] The rails are fixed to the short sleepers using fasteners and pre-embedded sleeves. The spatial position of the short sleepers is adjusted according to the construction error of the tunnel invert and the superelevation design of the curve in the line section. Then, a high-strength concrete filling layer is poured into the invert reserved groove on the surface of the flat top plate.

[0021] Alternatively, the construction method may include:

[0022] The adjustable ballastless track integrated inverted arch was lifted to the construction operation position;

[0023] By using fixing bolts and tunnel invert arch connecting hinges, the adjustable ballastless track integrated invert arch is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure.

[0024] The rails are fixed by fasteners and pre-embedded sleeves. The spatial position of the rails is adjusted according to the construction error of the tunnel invert. After the rails are placed in the groove, a high-strength concrete filling layer is poured, and the pre-embedded sleeves of the fasteners are poured into the high-strength concrete filling layer.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] This invention provides an adjustable integrated invert arch for ballastless track and its construction method to solve construction errors. Based on the integrated invert arch structure, longitudinal grooves are pre-reserved on the invert arch surface, or adjustable grooves are pre-reserved at the fastener installation locations. After the foundation of the adjustable integrated invert arch for ballastless track is completed, construction errors are adjusted using the grooves. In curved sections of the track, the positions of cast-in-place sleepers or fasteners are adjusted according to the actual superelevation of the track structure to achieve superelevation matching. This not only improves construction efficiency, saves labor costs, and shortens the construction period, but also allows for track superelevation adjustment, solving error problems during construction and broadening its application range. Attached Figure Description

[0027] 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 embodiments can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of the adjustable ballastless track integrated arch straight section structure provided in Embodiment 1 of the present invention.

[0029] Figure 2 This is a cross-sectional view of the adjustable ballastless track integrated arch curve section structure provided in Embodiment 1 of the present invention.

[0030] Figure 3 is a plan view of the adjustable ballastless track integrated arch provided in Embodiment 1 of the present invention.

[0031] Figure 4 is a schematic diagram of the connection method at the structural joint of the adjustable ballastless track integrated inverted arch provided in Embodiment 1 of the present invention.

[0032] Figure 5 This is a cross-sectional view of the adjustable ballastless track integrated arch straight section structure provided in Embodiment 2 of the present invention.

[0033] Figure 6This is a cross-sectional view of the adjustable ballastless track integrated arch curve section structure provided in Embodiment 2 of the present invention.

[0034] Figure 7 is a plan view of the adjustable ballastless track integrated arch provided in Embodiment 2 of the present invention.

[0035] Figure 8 is a schematic diagram of the connection method at the structural joint of the adjustable ballastless track integrated inverted arch provided in Embodiment 2 of the present invention.

[0036] The diagram is labeled as follows:

[0037] 1-Tunnel invert body, 2-Steel rail, 3-Short sleeper, 4-Fastener, 5-High-strength concrete filling layer, 6-Connecting steel bar, 7-Fixing bolt, 8-Tunnel invert connecting hinge, 9-Lifting point, 10-Invert reserved groove, 11-Curved bottom plate, 12-Flat top plate, 13-Vertical support rib, 14-Tunnel invert splicing surface, 15-Ballastless track bed raised structure, 16-Structural joint reinforcing steel bar;

[0038] 41-Fastener embedded sleeve;

[0039] 91-Lifting sleeve. Detailed Implementation

[0040] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0041] In the description of this invention, it should be understood that the terms "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "longitudinal", "lateral", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0044] In a specific implementation, the direction of the line is defined as longitudinal, the direction perpendicular to the line is defined as transverse, the direction closer to the centerline of the line is defined as inner, and the direction farther from the centerline of the line is defined as outer.

[0045] This invention provides an adjustable integrated invert arch for ballastless track to solve construction errors. Based on the prefabricated tunnel invert arch body 1, a pre-set groove 10 is provided for the invert arch. Short sleepers 3 or fasteners 4 are placed inside the groove 10. The short sleepers 3 or fasteners 4 are installed on this structure by post-casting to achieve precise positioning and eliminate construction errors of the tunnel invert arch.

[0046] The adjustable ballastless track integrated invert arch includes a tunnel invert arch body 1, which includes a planar top plate 12 and a curved bottom plate 11. A vertical support rib 13 is provided between the planar top plate 12 and the curved bottom plate 11, which is a prefabricated structure.

[0047] The top surface of the tunnel invert body 1 has two longitudinally arranged invert arch pre-reserved grooves 10 for left and right tracks. Each track invert arch pre-reserved groove 10 includes two longitudinal invert arch pre-reserved grooves 10, and a high-strength concrete filling layer 5 is poured into the invert arch pre-reserved groove 10. The top of the planar top plate 12 can also be provided with upwardly protruding ballastless track bed protrusion structures 15 on both sides, and the two track invert arch pre-reserved grooves 10 are respectively located on the top of the two ballastless track bed protrusion structures 15.

[0048] The invert arch reserved groove 10 is prefabricated on the surface of the flat top plate 12. The bottom of the invert arch reserved groove 10 is pre-embedded with connecting steel bars 6. The lower part of the connecting steel bars 6 is located in the flat top plate 12, and the upper part of the connecting steel bars 6 is embedded in the high-strength concrete filling layer 5.

[0049] The rail 2 is fixed to the top surface of the short sleeper 3 by fasteners 4, and the lower part of the short sleeper 3 is cast on the upper part of the high-strength concrete filling layer 5; or, the rail 2 is directly fixed to the upper part of the high-strength concrete filling layer 5 by fasteners 4. This structural form makes the spatial position of the rail 2 adjustable.

[0050] The prefabricated structure is spliced ​​longitudinally and circumferentially. The transverse sides of the planar top slab 12 are provided with upwardly protruding tunnel invert splicing surfaces 14. The inner side of the tunnel invert splicing surfaces 14 is provided with arc-shaped tunnel invert connecting hinges 8 for circumferential connection. The top of the longitudinal side of the planar top slab 12 is provided with arc-shaped fixing bolts 7 for longitudinal connection. The top of the longitudinal side of the planar top slab 12 is also provided with arc-shaped structural joint reinforcing bars 16 for longitudinal connection.

[0051] The adjustable ballastless track integrated inverted arch of the present invention can adopt two structural forms to meet different construction requirements.

[0052] Example 1:

[0053] like Figure 1-4 The adjustable ballastless track integrated invert arch for resolving construction errors includes a tunnel invert arch body 1, rails 2, short sleepers 3, fasteners 4, fastener embedded sleeves 41, high-strength concrete filling layer 5, connecting steel bars 6, fixing bolts 7, tunnel invert arch connecting hinges 8, lifting sleeves 9, invert arch reserved grooves 10, and structural joint reinforcing steel bars 16. Figure 3 and Figure 4 This is a schematic diagram showing the state without fastener 4 installed.

[0054] The tunnel invert arch body 1 is a precast reinforced concrete structure. The bottom surface of the invert arch is a curved bottom plate 11 that is completely fitted with the secondary lining of the tunnel. The surface of the flat top plate 12 has left and right symmetrical invert arch reserved grooves 10. Lifting points 9 are provided near the two ends. Four lifting sleeves 91 are provided near the lifting points 9 as stress points when lifting the tunnel invert arch structure. Vertical support ribs 12 are used in the middle of the integrated invert arch to form a longitudinally hollow through structure. This saves the amount of reinforced concrete while meeting the load-bearing capacity, and also takes into account the tunnel's drainage channel and other functions.

[0055] The short sleeper 3 is connected to the tunnel invert arch body 1 as a whole by pouring high-strength concrete into the pre-reserved groove 10 in the invert arch. Two short sleepers 3 are arranged longitudinally at certain intervals. According to the construction position of the integrated invert arch structure on site, the spatial position of the short sleepers 3 is adjusted to achieve the setting of track superelevation and adjust the construction error. The connection between the short sleeper 3 and the tunnel invert arch body 1 is reinforced by connecting steel bars 6. The short sleeper 3 has a pre-embedded sleeve 41 for fasteners. Through the interface relationship between the pre-embedded sleeve 41 and the fastener 4, the rail 2 is positioned in the groove, and then the geometry of the track is adjusted.

[0056] Along the longitudinal direction of the line, the two tunnel invert bodies 1 are spliced ​​and fixed together by fixing bolts 7. In the circumferential direction, the tunnel invert splicing surfaces 14 of the upper and lower segments are spliced ​​together by tunnel invert connecting hinges 8. The adjacent tunnel segments are reinforced by structural joint reinforcing steel bars 16.

[0057] The construction method of this embodiment includes:

[0058] S1: The adjustable ballastless track integrated inverted arch is lifted to the construction operation position via lifting point 9;

[0059] S2: Using fixing bolts 7 and tunnel invert arch connecting hinges 8, the invert arch structure is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure.

[0060] S3: After the tunnel invert construction is completed, the rails 2 are fixed to the short sleepers 3 using fasteners 4 and pre-embedded sleeves 41 to form a rail panel. The rail panel is then temporarily fixed using a rail panel frame. The rail panel frame used in this embodiment is an existing special tooling frame, including beams, legs, struts, etc. It is a rigid skeleton that can be finely adjusted in height, left and right, and gauge. Based on the construction error of the tunnel invert and the superelevation design of the curve section, the spatial position of the short sleepers 3 is adjusted. Then, a high-strength concrete filling layer 5 is poured into the longitudinal invert reserved groove 10 on the surface of the top plate 12, and reinforced with connecting steel bars 6 to address the construction error of the tunnel invert and the adjustment of the superelevation.

[0061] Example 2:

[0062] like Figure 5-8 The adjustable ballastless track integrated invert arch for resolving construction errors includes a tunnel invert arch body 1, rails 2, fasteners 4, fastener embedded sleeves 41, high-strength concrete filling layer 5, fixing bolts 7, tunnel invert arch connecting hinges 8, lifting sleeves 9, invert arch reserved grooves 10, ballastless track bed protrusion structure 15, and structural joint reinforcing steel bars 16. Figure 7 and Figure 8 This is a schematic diagram showing the state without fastener 4 installed.

[0063] The bottom surface of the tunnel invert arch body 1 is a curved bottom plate 11 that is completely fitted with the secondary lining of the tunnel. The surface of the planar top plate 12 has longitudinally continuous ballastless track bed protrusions 15 symmetrically arranged along the central axis. In straight sections, the ballastless track bed protrusions 15 remain horizontal, while in curved sections, in conjunction with the design of the curve superelevation value, an integrated invert arch structure with different superelevation values ​​is prefabricated. On the surface of the ballastless track bed protrusions 15, there are left and right symmetrical invert arch reserved grooves 10 at regular intervals. Lifting points 9 are located near the two ends, and four lifting sleeves 91 are located near the lifting points as stress points when lifting the tunnel invert arch structure. Vertical support ribs 12 are used in the middle of the integrated invert arch to form a longitudinally hollow through-body structure, which saves the amount of reinforced concrete while meeting the load-bearing capacity, and also takes into account the tunnel's drainage channel and other functions.

[0064] Based on the spatial position after the construction of the integrated invert arch on site, the rail 2 is fixed by fastener 4 and fastener pre-embedded sleeve 41. After adjusting the construction error and the geometric position of the track structure, a high-strength concrete filling layer 5 is poured in the reserved groove 10 of the invert arch to achieve a reliable connection between the fastener 4 and the tunnel invert arch body 1.

[0065] Along the longitudinal direction of the line, the two tunnel invert structures 1 are spliced ​​and fixed together by fixing bolts 7. Vertically, the tunnel invert splicing surfaces 14 of the upper and lower tunnel segments are spliced ​​together by tunnel invert connecting hinges 8. The adjacent tunnel segments are reinforced with structural joint reinforcing steel bars 16.

[0066] The construction method of this embodiment includes:

[0067] S1: The adjustable ballastless track integrated inverted arch is lifted to the construction operation position via lifting point 9;

[0068] S2: Using fixing bolts 7 and tunnel invert arch connecting hinges 8, the invert arch structure is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure.

[0069] S3: After the tunnel invert construction is completed, the rails 2 are fixed using fasteners 4 and pre-embedded sleeves 41 to form a rail panel, which is then temporarily fixed using a rail panel frame. The rail panel frame used in this embodiment is an existing specialized tooling frame, including beams, legs, and struts, forming a rigid skeleton that allows for fine-tuning of height, lateral alignment, and track gauge. Based on the construction error of the tunnel invert, the spatial position of the rails 2 is adjusted. After the rails 2 are positioned in the groove, a high-strength concrete filling layer 5 is poured, and the pre-embedded sleeves 41 are poured into the reserved groove 10 of the invert. The construction error of the tunnel invert body 1 is eliminated through the use of cast-in-place fasteners.

[0070] This invention addresses construction errors with an adjustable integrated ballastless track arch, integrating the ballastless track bed structure with the tunnel arch into a single prefabricated unit. The rails and fasteners (with sleeper blocks added in Example 1) are constructed using a pre-cast groove structure. This integration allows for adjustable rail positioning space, reducing construction errors, improving construction efficiency, shortening the construction period, and lowering labor costs. It also solves the problems of poor adaptability in traditional integrated prefabricated structures, thus having broader application prospects.

[0071] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. An adjustable ballastless track integrated inverted arch that solves construction errors, characterized by: The adjustable ballastless track integrated invert includes a tunnel invert body (1). The top surface of the tunnel invert body (1) has left and right track invert reserved grooves (10). Each track invert reserved groove (10) includes two longitudinal invert reserved grooves (10). A high-strength concrete filling layer (5) is poured into the invert reserved groove (10). The rail (2) is fixed to the top surface of the short sleeper (3) by fastener (4), and the lower part of the short sleeper (3) is poured on the upper part of the high-strength concrete filling layer (5). Alternatively, the rail (2) can be directly fixed to the upper part of the high-strength concrete filling layer (5) by fasteners (4).

2. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 1, characterized in that: The tunnel arch body (1) includes a planar top plate (12) and a curved bottom plate (11), and a vertical support rib (13) is provided between the planar top plate (12) and the curved bottom plate (11).

3. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 2, characterized in that: The pre-reserved groove (10) of the invert arch is prefabricated on the surface of the planar top plate (12). The bottom of the groove (10) of the invert arch is pre-embedded with connecting steel bars (6). The lower part of the connecting steel bars (6) is located in the planar top plate (12), and the upper part of the connecting steel bars (6) is embedded in the high-strength concrete filling layer (5).

4. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 3, characterized in that: The planar top plate (12) has upwardly protruding tunnel arch splicing surfaces (14) on both sides of the horizontal direction, and the inner side of the tunnel arch splicing surfaces (14) has an arc-shaped tunnel arch connecting hinge (8) for circumferential connection.

5. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 4, characterized in that: The top of the longitudinal side of the planar top plate (12) is provided with an arc-shaped fixing bolt (7) for longitudinal connection.

6. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 5, characterized in that: The top of the longitudinal side of the planar top plate (12) is also provided with an arc-shaped structural joint reinforcing bar (16) for longitudinal connection.

7. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 6, characterized in that: The top of the planar top plate (12) is provided with upward protruding ballastless track bed protrusions (15) on both sides, and the pre-reserved grooves (10) of the inverted arches of the two tracks are respectively located on the top of the ballastless track bed protrusions (15) on both sides.

8. The adjustable ballastless track integrated inverted arch for solving construction errors according to claim 7, characterized in that: A lifting sleeve (91) is pre-embedded in the top of the planar top plate (12).

9. The construction method for the adjustable ballastless track integrated inverted arch as described in claim 8, characterized in that: The construction method includes: The adjustable ballastless track integrated inverted arch was lifted to the construction operation position; By using the fixing bolts (7) and the tunnel invert arch connecting hinges (8), the adjustable ballastless track integrated invert arch is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure. The rail (2) is fixed on the short sleeper (3) by fastener (4) and fastener pre-embedded sleeve (41). The spatial position of the short sleeper (3) is adjusted according to the construction error of the tunnel arch and the curve superelevation design of the line section. Then, a high-strength concrete filling layer (5) is poured in the arch pre-reserved groove (10) on the surface of the plane top plate (12).

10. The construction method for the adjustable ballastless track integrated inverted arch as described in claim 8, characterized in that: The construction method includes: The adjustable ballastless track integrated inverted arch was lifted to the construction operation position; By using the fixing bolts (7) and the tunnel invert arch connecting hinges (8), the adjustable ballastless track integrated invert arch is spliced ​​longitudinally and circumferentially to form a tunnel profile structure with the same curvature as the secondary lining structure. The rail (2) is fixed by fastener (4) and fastener pre-embedded sleeve (41). The spatial position of the rail (2) is adjusted according to the construction error of the tunnel arch. After the rail (2) is placed in the groove, a high-strength concrete filling layer (5) is poured and the fastener pre-embedded sleeve (41) is poured into the high-strength concrete filling layer (5).

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