Cross-ring repair structure and method for shield segment ring

Abstract

This application discloses a cross-ring repair structure and method for shield tunnel segment rings, belonging to the field of shield tunnel engineering technology. Its main purpose is to solve the problems of limited improvement in the overall longitudinal stiffness of the tunnel by existing single-ring bracing reinforcement methods, the obstruction of operation and maintenance due to anchor bolts and covering connecting bolts, and easy leakage at the joints between shield tunnel segment rings. The aim is to achieve effective reinforcement and repair of the shield tunnel structure, prevent leakage at the joints, and retain space for daily operation and maintenance of the connecting bolts, ensuring the structural safety of the shield tunnel during long-term service. The main technical solution of this application is as follows: The cross-ring repair structure for shield tunnel segment rings includes a steel support. The steel support spans the inner side of two adjacent shield tunnel segment rings and connects the joint between the two adjacent shield tunnel segment rings. A cement-based composite material is filled between the steel support and the inner wall of the two adjacent shield tunnel segment rings.

Description

Technical Field

[0001] This application belongs to the field of shield tunnel engineering technology, specifically relating to a cross-ring repair structure and repair method for shield tunnel segment rings. Background Technology

[0002] During long-term service, shield tunnels are subjected to complex working conditions such as ground pressure, traffic loads, and disturbances from surrounding construction, which can easily cause cumulative damage to the structure. This often results in excessive deformation of the shield segments, which urgently needs to be repaired.

[0003] Existing techniques for repairing shield tunnel segment rings involve adding a steel lining to the inside of the existing shield tunnel structure using annular steel plates anchored with bolts. This reinforcement method requires anchoring the existing shield segment rings and also covers the original connecting bolts, hindering routine maintenance. Furthermore, while this single-ring inner-side bracing reinforcement method significantly improves the performance of individual shield segment rings, it has limited effect on increasing the overall longitudinal stiffness of the shield tunnel. Additionally, the joints between the shield segment rings themselves can become leakage channels in the tunnel. Summary of the Invention

[0004] In view of this, this application provides a cross-ring repair structure and repair method for shield tunnel segment rings. The main purpose is to solve the problems of limited improvement of the overall longitudinal stiffness of the tunnel by the existing single-ring bracing reinforcement method, the obstruction of operation and maintenance by installing anchor bolts and covering connecting bolts, and easy leakage between shield tunnel segment rings. It realizes effective reinforcement and repair of shield tunnel structure, prevents leakage at joints, and retains daily operation and maintenance space for connecting bolts, thus ensuring the structural safety of shield tunnel in long-term service.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: One aspect of this application provides a cross-ring repair structure for shield tunnel segment rings, including a steel support, the steel support being disposed across the inner side of two adjacent shield tunnel segment rings and bridging the joint between the two adjacent shield tunnel segment rings, and a cement-based composite material being filled between the steel support and the inner sidewall of the two adjacent shield tunnel segment rings.

[0006] Optionally, the steel support spans the section between two adjacent shield tunnel segment rings and is aligned with the joint between the two adjacent shield tunnel segment rings.

[0007] Optionally, the steel support includes a cross-joint connecting web, a first flange, and a second flange; the cross-joint connecting web spans the joint between two adjacent shield segment rings; the first flange and the second flange are respectively perpendicularly connected to both ends of the cross-joint connecting web and extend radially toward the inner wall of the shield segment ring; the side of the first flange away from the cross-joint connecting web is attached to the inner wall of one of the two adjacent shield segment rings, and the side of the second flange away from the cross-joint connecting web is attached to the inner wall of the other of the two adjacent shield segment rings; the cross-joint connecting web, the first flange, and the second flange form a groove, and the cement-based composite material is filled in the groove.

[0008] Optionally, the steel support is an assembled structure, comprising multiple steel components, which are sequentially spliced ​​together along the circumference of the shield tunnel segment ring.

[0009] Optionally, among the multiple steel components arranged circumferentially along the shield tunnel segments, the steel components corresponding to the track bed structure of the shield tunnel are assembled and connected to the track bed structure.

[0010] Optionally, the track bed structure is provided with a connecting part at the position corresponding to the steel component, and the steel component is assembled and connected with the connecting part.

[0011] Optionally, the connecting part includes an anchor plate and an anchor bolt, the anchor plate is fixedly mounted on the track bed structure by the anchor bolt, and the steel component is connected to the anchor plate by welding.

[0012] Optionally, the cement-based composite material is ultra-high performance concrete.

[0013] Another aspect of this application provides a method for cross-ring repair of shield tunnel segment rings, used to carry out the installation of the cross-ring repair structure for shield tunnel segment rings as described in any one of the above claims, comprising the following steps: The steel components in the steel support corresponding to the layout position of the shield tunnel track structure are assembled and connected with the track structure. The cement-based composite material is poured into the gap formed between the steel member connected to the track bed structure and the inner sidewall of two adjacent shield tunnel segment rings; Along the circumference of the shield tunnel segment ring, the remaining steel components are sequentially spliced ​​on the basis of the fixed steel components. After each steel component is assembled, the cement-based composite material is poured into the gap between the corresponding steel component and the inner wall of the two adjacent shield tunnel segment rings. The splicing and pouring operations of the steel components are repeated until all the steel components are spliced ​​and the corresponding gaps are filled with the cement-based composite material, thus completing the cross-ring repair operation.

[0014] Optionally, before assembling and connecting the steel components in the steel support corresponding to the layout position of the shield tunnel track structure with the track structure, the method further includes: The inner wall surfaces of the two adjacent shield tunnel segment rings to be repaired near the joint are roughened.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The cross-ring repair structure and method for shield tunnel segment rings provided in this application, by placing steel supports across the inner sides of two adjacent shield tunnel segment rings and bridging the joint between them, eliminates the need for anchor bolts on the existing shield tunnel segment rings and avoids covering the original connecting bolts, ensuring the daily maintenance of the connecting bolts. Simultaneously, the cross-ring setting of the steel supports effectively improves the overall longitudinal stiffness of the shield tunnel. Furthermore, the cement-based composite material filling between the steel supports and the inner walls of the two adjacent shield tunnel segment rings enables the steel supports and the shield tunnel segment rings to form a synergistic force-bearing system, effectively improving the load-bearing capacity and deformation resistance of the shield tunnel segment rings. It also reliably seals the joint between two adjacent shield tunnel segment rings, eliminating potential leakage hazards at the joint. This achieves integrated treatment of shield tunnel segment ring reinforcement and repair with joint seepage prevention, comprehensively improving the overall service performance and durability of the shield tunnel structure. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of a cross-ring repair structure for a shield tunnel segment ring according to an optional embodiment of this application. Figure 2 This is a schematic diagram of the arrangement of the cross-ring repair structure for a shield tunnel segment ring according to an optional embodiment of this application; Figure 3 A cross-sectional schematic diagram of the steel support and the inner filling structure of the shield segment ring in the cross-ring repair structure of the shield segment ring, which is an optional embodiment of this application. Figure 4 This is a flowchart of a cross-ring repair method for shield tunnel segment rings, which is an optional embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 100. Cross-ring repair structure; 200. Shield tunnel segment ring; 300. Track bed structure; 1. Steel support; 11. Cross-joint web; 12. First flange; 13. Second flange; 2. Connecting part. Detailed Implementation

[0018] In the description of this application, 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", etc., 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 application 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 application.

[0019] 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 one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly 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 connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See also Figures 1 to 3 As shown, according to an embodiment of this application, a cross-ring repair structure 100 for a shield tunnel segment ring 200 is provided, including a steel support 1. The steel support 1 spans the inner side of two adjacent shield tunnel segment rings 200 and crosses the joint between the two adjacent shield tunnel segment rings 200. Cement-based composite material is filled between the steel support 1 and the inner sidewall of the two adjacent shield tunnel segment rings 200.

[0023] The cross-ring repair structure 100 for the shield tunnel segment ring 200 provided in this embodiment of the application, by placing the steel support 1 across the inner side of two adjacent shield tunnel segment rings 200 and bridging the joint between the two adjacent shield tunnel segment rings 200, eliminates the need to install anchor bolts on the existing shield tunnel segment rings 200 and does not cover the original connecting bolts of the shield tunnel segment rings 200, thus ensuring the daily operation and maintenance of the connecting bolts. At the same time, the cross-ring setting of the steel support 1 can effectively improve the overall longitudinal stiffness of the shield tunnel, and the steel support 1 The cement-based composite material filling the space between the inner walls of two adjacent shield tunnel segment rings 200 enables the steel support 1 and the shield tunnel segment ring 200 to form a synergistic force-bearing system, effectively improving the load-bearing capacity and deformation resistance of the shield tunnel segment ring 200. It can also reliably seal the joints between two adjacent shield tunnel segment rings 200, eliminating the risk of leakage at the joints. This achieves integrated treatment of shield tunnel segment ring 200 reinforcement and repair with joint seepage prevention, comprehensively improving the overall service performance and durability of the shield tunnel structure.

[0024] It is understandable that the shield tunnel structure is formed by splicing multiple shield segment rings 200 sequentially along the longitudinal direction of the tunnel. Each shield segment ring 200 is formed by splicing multiple arc-shaped shield segments along the circumferential direction of the tunnel. As a result, longitudinal joints are formed between adjacent shield segment rings 200 on the shield tunnel structure. These joints are the weak points of the shield tunnel structure and are also the functional areas of the aforementioned cross-ring repair structure 100 for shield segment rings 200. The cross-ring repair structure 100 achieves integrated repair treatment of the joints between adjacent shield segment rings 200 by arranging them across adjacent shield segment rings 200 and bridging the joints.

[0025] It is understandable that the steel support 1, as the load-bearing component of the cross-ring repair structure 100 of the aforementioned shield tunnel segment ring 200, is integrally arranged in the inner region of two adjacent shield tunnel segment rings 200, and the arrangement range of the steel support 1 directly spans the joint position between two adjacent shield tunnel segment rings 200, so that the steel support 1 simultaneously forms contact and fits with two adjacent shield tunnel segment rings 200, realizing synchronous cross-ring support for two adjacent shield tunnel segment rings 200; at the same time, the gap between the steel support 1 and the inner wall of the two adjacent shield tunnel segment rings 200 is integrally filled with cement-based composite material. After being filled, the cement-based composite material will solidify and form a tight bonding surface with the steel support 1 and the inner wall of the shield segment ring 200, completely eliminating the gaps between the three. This allows the steel support 1 to be firmly connected to the two adjacent shield segment rings 200 as a whole through the cement-based composite material. This ensures that the load-bearing capacity of the steel support 1 can be evenly transferred to the two adjacent shield segment rings 200, and also completely seals the joints between the shield segment rings 200 through the cement-based composite material. Ultimately, this achieves the coordinated implementation of the support and reinforcement of the shield segment rings 200 and the seepage prevention treatment of the joints between the shield segment rings 200.

[0026] It is understood that the cement-based composite material is ultra-high performance concrete (UHPC). There are various types of ultra-high performance concrete that can be used. This application does not limit the specific type. For example, fiber-reinforced ultra-high performance concrete, self-compacting ultra-high performance concrete, etc. can be used.

[0027] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the steel support 1 spans the section between two adjacent shield tunnel segment rings 200 and is aligned with the joint between the two adjacent shield tunnel segment rings 200.

[0028] In this embodiment, the section of the steel support 1 spanning two adjacent shield tunnel segment rings 200 is aligned with the joint between the two adjacent shield tunnel segment rings 200. This allows the steel support 1 to precisely act on the weak points of the shield tunnel structure, enabling the supporting force of the steel support 1 to be directly and evenly transmitted to the shield tunnel segment rings 200 on both sides of the joint. This effectively enhances the structural stability and deformation resistance of the joint area. At the same time, the cement-based composite material filling the space between the steel support 1 and the inner wall of the shield tunnel segment ring 200 can more fully seal the gaps around the joint, further improving the seepage prevention reliability at the joint and strengthening the integrated treatment of shield tunnel segment ring 200 reinforcement and repair and joint seepage prevention.

[0029] It is understandable that the section of the steel support 1 spanning two adjacent shield segment rings 200 is aligned with the joint between the two adjacent shield segment rings 200. This means that the section of the steel support 1 spanning two shield segment rings 200 forms a precise positional correspondence with the joint between the corresponding two adjacent shield segment rings 200 to be repaired in the spatial layout of the shield tunnel. The longitudinal centerline of the tunnel in this spanning section coincides with the longitudinal extension line of the joint, and the circumferential width of the tunnel in this section is not less than the circumferential width of the joint. This ensures that the spanning section of steel support 1 spatially covers the joint between two adjacent shield tunnel segment rings 200. At the same time, the two sides of this spanning section extend into the inner areas of the two adjacent shield tunnel segment rings 200, ensuring both precise alignment between the spanning section of steel support 1 and the joint, and reliable overlap between the spanning section and the two shield tunnel segment rings 200. This allows the spanning section of steel support 1 to directly fit the weak joint area of ​​the corresponding shield tunnel structure, and the overall layout range of this section completely covers the longitudinal and circumferential extension range of the joint, without any positional offset or partial uncovering. This makes the spanning section of steel support 1 the support area directly corresponding to the joint, laying a spatial foundation for the subsequent filling of cement-based composite materials between steel support 1 and the segment ring, as well as the precise transmission of the supporting force of steel support 1.

[0030] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 3As shown, the steel support 1 includes a cross-joint connecting web 11, a first flange 12, and a second flange 13. The cross-joint connecting web 11 spans the joint between two adjacent shield segment rings 200. The first flange 12 and the second flange 13 are respectively vertically connected to the two ends of the cross-joint connecting web 11 and extend radially toward the inner wall of the shield segment ring 200. The side of the first flange 12 away from the cross-joint connecting web 11 is attached to the inner wall of one of the two adjacent shield segment rings 200, and the side of the second flange 13 away from the cross-joint connecting web 11 is attached to the inner wall of the other of the two adjacent shield segment rings 200. The cross-joint connecting web 11, the first flange 12, and the second flange 13 form a groove, and the cement-based composite material is filled in the groove.

[0031] In this embodiment, the groove formed by the cross-joint connecting web 11, the first flange 12, and the second flange 13 provides a stable filling space for the cement-based composite material and acts as a limit, ensuring that the cement-based composite material is fully filled and tightly bonded to the various components of the steel support 1 and the inner wall of the shield segment ring 200. This not only strengthens the connection between the steel support 1 and the shield segment ring 200, making them form a synergistic force-bearing system to further improve the load-bearing capacity and deformation resistance of the shield segment ring 200, but also enables the cement-based composite material to completely seal the joints and surrounding gaps within the groove coverage area, significantly improving the seepage prevention performance at the joints, thereby optimizing the overall effect of the integrated treatment of the reinforcement and repair of the shield segment ring 200 and the seepage prevention at the joints.

[0032] It is understandable that the cross-joint connecting web 11 is an arc-shaped plate structure that matches the inner curvature of the shield segment ring 200, and is symmetrically arranged with the longitudinal center line of the joint between adjacent shield segment rings 200 as the axis of symmetry.

[0033] It is understood that the two ends of the cross-joint connecting web 11 along the longitudinal direction of the shield tunnel are respectively rigidly connected to the first flange 12 and the second flange 13. The first flange 12 can extend radially toward the inner wall of the adjacent left shield segment ring 200 and fit tightly against the inner wall. The second flange 13 can extend radially toward the inner wall of the adjacent right shield segment ring 200 and fit tightly against the inner wall.

[0034] It is understandable that the cross-joint connecting web 11 serves as the arc-shaped bottom of the groove, and the first flange 12 and the second flange 13 serve as the two sides of the groove, respectively. The three together form a groove structure with the opening facing the inner wall of the shield segment ring 200.

[0035] In the above embodiment, the steel support 1 is a modular structure, comprising multiple steel components that are sequentially spliced ​​along the circumference of the shield tunnel segment ring 200. This facilitates transportation, hoisting, and installation within the confined space inside the shield tunnel.

[0036] It is understandable that the multiple steel components that make up the steel support 1 can be made of arc-shaped channel steel. When the steel support 1 is formed by splicing these multiple steel components, each steel component can be fixed by bolt connection or welding, thereby ensuring the continuity of the overall structure of the steel support 1, ensuring that it can form a complete load-bearing frame, and stably play the role of cross-ring support and cooperative force bearing.

[0037] Understandably, the assembled steel support 1 forms an integral support structure, its shape matching the inner arc of the shield tunnel segment ring 200. It is integrally installed across the inner sides of two adjacent shield tunnel segment rings 200, simultaneously bridging the joints between them. After the cement-based composite material is filled between each steel component and the inner wall of the shield tunnel segment ring 200, it completely covers the joints of each steel component. This ensures the sealing of the joints to enhance seepage prevention, and also allows each steel component and the cement-based composite material to form an integral whole, ensuring the continuity and stability of the overall load-bearing capacity of the steel support 1.

[0038] Further, see Figure 1 As shown, among the multiple steel components arranged circumferentially along the shield tunnel segment ring 200, the steel components corresponding to the arrangement positions of the shield tunnel track structure 300 are assembled and connected with the track structure 300.

[0039] In this embodiment, after the steel components corresponding to the layout positions of the shield tunnel track structure 300 are assembled and connected with the track structure 300, they can serve as the assembly foundation and positioning reference for other subsequent steel components. With the stable, reliable, and fixed-position characteristics of the track structure 300, it provides a precise installation reference for other steel components spliced ​​along the circumference of the shield segment ring 200, ensuring that the layout positions of each steel component along the circumference of the segment ring meet the design requirements. This effectively avoids the misalignment and offset of each steel component caused by the lack of assembly reference, and ensures the overall shape of the steel support 1 formed by splicing multiple steel components and its compatibility with the inner side of the shield segment ring 200. Meanwhile, the firm connection between the steel component and the track bed structure 300 forms a stable assembly support, allowing other steel components to be precisely connected and fixed around this foundation in sequence. This simplifies the steel component assembly process within the limited tunnel space, improves assembly efficiency and splicing quality, and ensures that each section of steel component is tightly connected to form a complete and continuous cross-ring support system. This lays a solid foundation for subsequent cement-based composite material filling and overall synergistic stress distribution, further ensuring the support and reinforcement of the segment ring and the joint seepage prevention effect of the cross-ring repair structure 100.

[0040] In the above embodiments, see Figure 1 As shown, a connecting part 2 is provided at the position corresponding to the steel component on the track bed structure 300, and the steel component is assembled and connected with the connecting part 2.

[0041] It is understood that the connecting part 2 can be implemented in various ways, as long as it can achieve the assembly and connection of the steel component and the track bed structure 300. This application does not limit its specific type. For example, the connecting part 2 is set as a slot structure. The slot structure is opened on the track bed structure 300 at a position that matches the corresponding steel component. It is used to insert one end of the steel component that is arranged circumferentially along the shield tunnel segment ring 200 and corresponds to the position of the track bed structure 300, thereby realizing the precise assembly and connection of the steel component and the track bed structure 300, and providing a stable foundation for the subsequent assembly of other steel components.

[0042] In addition, the connecting part 2 can also be configured in the following ways, see Figure 1 As shown, the connecting part 2 includes an anchor plate and an anchor bolt. The anchor plate is fixedly installed on the track bed structure 300 by the anchor bolt, and the steel component is connected to the anchor plate by welding.

[0043] Understandably, the anchor plate is fixed to the track bed structure 300 by anchor bolts, ensuring a firm and stable connection between the anchor plate and the track bed structure 300, preventing displacement or loosening of the anchor plate, and providing a reliable connection carrier for the steel components. The steel components and anchor plates are connected by welding, achieving a tight and high-strength bond between them, ensuring the stability of the connection between the steel components and the track bed structure 300. This allows the steel components to serve as a stable assembly foundation and precise positioning benchmark for other steel components of the prefabricated steel support 1, effectively avoiding misalignment and offset problems caused by unstable benchmarks during subsequent steel component assembly. It also ensures the overall shape of the steel support 1 formed by splicing multiple steel components and its compatibility with the inner side of the shield tunnel segment ring 200, improving the assembly quality and efficiency of the steel support 1. This provides a solid guarantee for the subsequent filling of cement-based composite materials and overall synergistic stress of the cross-ring repair structure 100, strengthening the support and reinforcement effect of the cross-ring repair structure 100 on the shield tunnel segment ring 200 and the seepage prevention effect on the joints between the shield tunnel segment rings 200.

[0044] Further, see Figure 4 As shown, in order to clearly illustrate the specific construction process of the cross-ring repair structure 100 of the shield tunnel segment ring 200, the embodiments of this application also provide a cross-ring repair method for the shield tunnel segment ring 200, used to carry out the installation operation of the cross-ring repair structure 100 of the shield tunnel segment ring 200 as described above, including the following steps: Step S101: Assemble and connect the steel components in the steel support 1 to the track bed structure 300 at the corresponding locations of the shield tunnel track bed structure 300. Step S102: Pour cement-based composite material into the gap formed between the steel member connected to the track bed structure 300 and the inner wall of the two adjacent shield segment rings 200; Step S103: Along the circumference of the shield tunnel segment ring 200, the remaining steel components are sequentially spliced ​​on the basis of the fixed steel components. After each steel component is assembled, cement-based composite material is poured into the gap between the corresponding steel component and the inner wall of the two adjacent shield tunnel segment rings 200. The splicing and pouring operations of the steel components are repeated until all steel components are spliced ​​and the corresponding gaps are filled with cement-based composite material, thus completing the cross-ring repair operation.

[0045] Understandably, before implementing step S101, the inner wall surfaces of the two adjacent shield tunnel segment rings 200 to be repaired near the joint are roughened. Roughening improves the bonding strength between the subsequently filled cement-based composite material and the inner wall of the shield tunnel segment ring 200, preventing hollowing and peeling at the interface, and ensuring coordinated stress distribution and seepage prevention. For example, the circumferential width of the steel support 1 is 400mm. Correspondingly, a 200mm wide roughening process is performed along the circumferential direction on the inner wall surfaces of the adjacent shield tunnel segment rings 200 to be repaired near the joint. Simultaneously, the roughening operation avoids the original connecting bolts of the shield tunnel segment rings 200, preventing damage to the bolt structure and ensuring that the original connection performance of the shield tunnel segment rings 200 is not affected.

[0046] It is understandable that during the implementation of step S102, the cement-based composite material is poured into the gap between the steel member connected to the track bed structure 300 and the inner wall of the adjacent two shield segment rings 200 through the groove opening end away from the track bed structure 300.

[0047] Understandably, step S103 is implemented as follows: along the circumference of the shield segment ring 200, the remaining steel components are assembled sequentially with the fixed steel components as the reference. After each steel component is assembled and fixed, cement-based composite material is poured into the gap between the steel component and the inner wall of the two adjacent shield segment rings 200, referring to the pouring method in step S102. This splicing and pouring operation is repeated until only the last steel component to be assembled remains. A casting hole is pre-drilled on the last steel component, and the casting hole is connected to the groove of the steel component. After the last steel component is spliced ​​and fixed along the circumference of the shield segment ring 200, cement-based composite material is poured into the groove of the steel component and the gap between the steel component and the inner sidewall of the two adjacent shield segment rings 200 through the casting hole to ensure that the material is filled tightly. The casting operation is stopped when the cement-based composite material overflows naturally from the preset venting position, and the cross-ring repair operation of the shield segment ring 200 is completed.

[0048] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A cross-ring repair structure for shield tunnel segment rings, characterized in that, The device includes a steel support that spans the inner side of two adjacent shield tunnel segment rings and connects the joint between the two adjacent shield tunnel segment rings. The space between the steel support and the inner wall of the two adjacent shield tunnel segment rings is filled with a cement-based composite material.

2. The cross-ring repair structure for shield tunnel segment rings according to claim 1, characterized in that, The steel support spans the section between two adjacent shield tunnel segment rings and is aligned with the joint between the two adjacent shield tunnel segment rings.

3. The cross-ring repair structure for shield tunnel segment rings according to claim 1, characterized in that, The steel support includes a cross-joint connecting web, a first flange, and a second flange; the cross-joint connecting web spans the joint between two adjacent shield tunnel segment rings; the first flange and the second flange are respectively perpendicularly connected to both ends of the cross-joint connecting web and extend radially toward the inner wall of the shield tunnel segment ring; the side of the first flange away from the cross-joint connecting web is attached to the inner wall of one of the two adjacent shield tunnel segment rings, and the side of the second flange away from the cross-joint connecting web is attached to the inner wall of the other of the two adjacent shield tunnel segment rings; the cross-joint connecting web, the first flange, and the second flange form a groove, and the cement-based composite material is filled in the groove.

4. The cross-ring repair structure for shield tunnel segment rings according to claim 1, characterized in that, The steel support is a modular structure, comprising multiple steel components that are sequentially spliced ​​together along the circumference of the shield tunnel segment ring.

5. The cross-ring repair structure for shield tunnel segment rings according to claim 4, characterized in that, Among the multiple steel components arranged circumferentially along the shield tunnel segments, the steel components corresponding to the track bed structure of the shield tunnel are assembled and connected to the track bed structure.

6. The cross-ring repair structure for shield tunnel segment rings according to claim 5, characterized in that, The track bed structure is provided with a connecting part at the position corresponding to the steel component, and the steel component is assembled and connected to the connecting part.

7. The cross-ring repair structure for shield tunnel segment rings according to claim 6, characterized in that, The connecting part includes an anchor plate and an anchor bolt. The anchor plate is fixedly installed on the track bed structure by the anchor bolt, and the steel component is connected to the anchor plate by welding.

8. The cross-ring repair structure for shield tunnel segment rings according to claim 1, characterized in that, The cement-based composite material is ultra-high performance concrete.

9. A method for cross-ring repair of shield tunnel segment rings, characterized in that, The installation operation for the cross-ring repair structure of the shield tunnel segment ring according to any one of claims 1-8 includes the following steps: The steel components in the steel support corresponding to the layout position of the shield tunnel track structure are assembled and connected with the track structure. The cement-based composite material is poured into the gap formed between the steel member connected to the track bed structure and the inner sidewall of two adjacent shield tunnel segment rings; Along the circumference of the shield tunnel segment ring, the remaining steel components are sequentially spliced ​​on the basis of the fixed steel components. After each steel component is assembled, the cement-based composite material is poured into the gap between the corresponding steel component and the inner wall of the two adjacent shield tunnel segment rings. The splicing and pouring operations of the steel components are repeated until all the steel components are spliced ​​and the corresponding gaps are filled with the cement-based composite material, thus completing the cross-ring repair operation.

10. The method for cross-ring repair of shield tunnel segment rings according to claim 9, characterized in that, Before assembling and connecting the steel components in the steel support corresponding to the layout position of the shield tunnel track structure with the track structure, the method further includes: The inner wall surfaces of the two adjacent shield tunnel segment rings to be repaired near the joint are roughened.

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